CN113882331A - Wave-absorbing energy-absorbing protection framework capable of improving anti-seismic performance of concrete dam - Google Patents
Wave-absorbing energy-absorbing protection framework capable of improving anti-seismic performance of concrete dam Download PDFInfo
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Abstract
The invention belongs to the technical field of vibration safety and wave absorption and energy absorption of gravity dams, and particularly relates to a wave absorption and energy absorption protective framework for improving the anti-vibration performance of a concrete dam, which is novel in structure, is provided with a wave absorption and energy absorption layer for protecting the surface of a dam body, and the wave absorption and energy absorption layer is used as a buffer layer, so that the density degree of wave crests of transverse waves and longitudinal waves can be effectively reduced, the intensity level of the transverse waves and the longitudinal waves on the gravity dam after action can be reduced, a more reasonable anti-vibration structure can be further realized in the gravity dam, the superposition of bedrocks and a cementing surface of a dam heel of the gravity dam can be better protected, the probability of a slip crack surface is reduced, the anti-slip stability of the gravity dam is indirectly improved, meanwhile, a floating energy dissipation mechanism is utilized for further protecting the horizontal plane of an upstream water body, and the problem of dam body vibration caused by the transverse waves and the longitudinal waves on the dam body caused by upstream reservoir water is effectively solved, the influence of vibration caused by water body impact on the dam body is reduced, and the stability of the dam body is improved.
Description
Technical Field
The invention belongs to the technical field of vibration safety and wave absorption and energy absorption of gravity dams, and particularly relates to a wave absorption and energy absorption protection framework for improving the anti-seismic performance of a concrete dam.
Background
At present, flood disasters occur in summer in China frequently, people are aware of the importance of hydraulic buildings, and the hydraulic buildings are mainly constructed by using materials such as a normal state and roller compacted concrete, so that the requirements on stability and strength are met by means of the gravity of the hydraulic buildings, but the hydraulic buildings are far from the aspects of earthquake-resistant and earthquake-proof work. When people select concrete, the main considered directions are strength, impermeability, frost resistance and scour resistance, but many design projects only have limitation to meet the requirement of earthquake resistance, and no specific measures are provided in the damping project, so that the damping can be considered from the aspect of filling materials of gravity dams and specific damping structures. The concrete gravity dam mainly considers the points for ensuring normal water retaining, flood discharging and the like of the concrete gravity dam for a long time, but concrete materials selected by the dam face of most of the gravity dams cannot play a role in wave absorption and energy absorption, and a structure for offsetting impact force of the water surface by using a specific structure is not provided, so that the concrete gravity dam has defects in anti-seismic and shock-absorbing engineering measures of the dam.
At present, the engineering quantity of the concrete gravity dam is particularly large, the dam building technology is more and more skilled, the economic benefit brought to the society by the dam is huge, but the concrete gravity dam faces the energy caused by transverse waves, longitudinal waves and seismic waves brought by upstream reservoir water, and the concrete gravity dam causes vibration. The series of vibrations may crack the weak part of the concrete gravity dam, further causing the dam to be damaged.
At present, normal concrete is mostly selected in the construction engineering of the gravity dam and is mainly selected according to the performance of the concrete, but the performance of the normal concrete in the wave absorption and energy absorption aspects is poor, waves impact the surface of the gravity dam for a long time in the upstream area of the gravity dam, impact kinetic energy acts on the gravity dam, and the energy dissipation effect is poor.
Disclosure of Invention
Aiming at the defects and problems of the existing equipment, the invention provides a wave-absorbing and energy-absorbing protective framework for improving the seismic performance of a concrete dam, which has the advantages of definite structural action, simple design, obvious shock-absorbing effect and convenient construction, and effectively solves the problems that the dam is cracked and extended at the weakest part of the dam body and the safety and stability of the dam are damaged due to shock waves brought by reservoir water at the upstream and seismic waves brought by earthquake to the gravity dam under the condition of normal operation of the gravity dam at present.
The technical scheme adopted by the invention for solving the technical problems is as follows: a wave-absorbing energy-absorbing protective framework for improving the anti-seismic performance of a concrete dam comprises a wave-absorbing energy-absorbing layer and a floating energy-absorbing mechanism; covering and continuously arranging wave-absorbing and energy-absorbing layers on the surface of the dam body and the foundation; the floating energy dissipation mechanism comprises a guide steel wire, a fixed anchor rod, a fixed seat, a floating frame and an energy dissipation grid plate; the fixed anchor rod is anchored on the foundation, the fixed seat is fixed on the upper part of the dam body, and the upper end and the lower end of the guide steel wire are respectively fixed on the fixed seat and the fixed anchor rod; the rear side of the floating frame is provided with a guide sleeve which is sleeved on a guide steel wire, and the floating frame floats on the water surface and can move up and down along the guide steel wire along with the rise and fall of the water level; the upper side and the lower side of the floating frame are provided with mounting plates, and the middle parts of the upper side and the lower side of the energy dissipation grid plate are provided with rotating shafts which are rotatably arranged on the mounting plates.
Furthermore, the mounting panel is provided with corresponding shaft hole, axle sleeve about the shaft hole endotheca, and the pivot is installed in the axle sleeve through the torsional spring.
Furthermore, the floating frame is of a U-shaped structure, the mounting plate is arranged at the opening, and a guide seat is arranged on the rear side wall of the floating frame and is positioned on the perpendicular bisector of the two rotating shafts.
Furthermore, the floating frames are arranged in a plurality of groups side by side, and two guide steel wires are arranged on the rear side of each group of floating frames; the adjacent floating frames are in clearance or fixedly connected together through side plates.
Furthermore, pivot protrusion and mounting panel to be located same water flat line, the end of pivot is fixed with the connecting rod, and the both ends of connecting rod articulate has the synchronizing bar, the synchronizing bar is parallel with the pivot line, has formed parallelogram's synchronous drive structure, makes each pivot pass through the linkage of synchronous drive structure.
Furthermore, each energy dissipation grid plate is respectively at different inclination angles in the initial state of the torsion spring.
Furthermore, springs are arranged at four end points of the synchronous driving structure, the outer ends of the springs are fixed on the fixing plate, and the elastic coefficients of the two springs at opposite angles are the same.
Furthermore, the wave absorption layer is any one of cast-in-place foam concrete, rubber concrete, steel reinforced concrete and plastic concrete.
Furthermore, the dam body comprises an overflow dam section and a water retaining dam section, the water retaining dam section is divided into five partitions, the overflow dam section is divided into four partitions, concrete partitions of the four dam bodies in front of the water retaining dam section are wave-absorbing energy-absorbing layers, the thickness of the concrete poured by the wave-absorbing energy-absorbing layers is 0.5m-1m, and the V-th partition is made of roller compacted concrete; the concrete partitions of the first three dam bodies of the overflow dam section are wave-absorbing energy-absorbing layers, and the range of the poured thickness is 0.5m-1 m.
Furthermore, two sides of the dam body also comprise side piers and retaining walls; the side piers and the retaining wall are provided with wave-absorbing energy-absorbing layers and form a continuous surface anti-seismic structure.
The invention has the beneficial effects that: the invention adds a wave-absorbing energy-absorbing layer around the dam, the wave-absorbing energy-absorbing layer mainly plays a role in reducing the shock wave brought by the reservoir water at the upstream and the shock influence of the seismic wave brought by the earthquake on the gravity dam, the wave-absorbing energy-absorbing layer has good low elasticity and shock-absorbing property, pressure resistance, durability, water resistance and the like, the energy caused by the shock wave and the seismic wave on the dam can be effectively counteracted by the wave-absorbing energy-absorbing material, in addition, in the consolidation grouting, dilute slurry can be used firstly, then the wave-absorbing energy-absorbing slurry is used, and the gravity dam forms a complete whole after the grouting is finished.
Meanwhile, the invention arranges a floating energy dissipation mechanism in the upstream area of the dam body, the floating energy dissipation mechanism is fixed with the foundation by using a fixed anchor rod, a fixed seat is fixed with the upper part of the dam body, a guide steel wire is arranged between the fixed anchor rod and the fixed seat to form a guide structure with the bottom extending underwater and the upper part extending above the water level, a plurality of groups of guide structures are arranged, the guide structures are used as a fixed foundation to be provided with a floating frame, the floating frame can be provided with self floating coefficients and loads, so that the floating frame can float in the water body and can move up and down on the guide steel wire along with the rising and falling of the water level, the part of the floating frame is positioned above the water level and below the water level, so that the floating frame can be always matched with the position of the horizontal plane, aiming at the position of impact force near the horizontal plane, a grid plate is arranged in the floating frame to dissipate energy, and the kinetic energy is received by the energy dissipation grid plate, and the part of kinetic energy is consumed by the rotation of the energy dissipation grid plate.
In the energy dissipation part, the torsion spring is arranged at the rotating shaft, the torsion spring is used for absorbing and storing the initial kinetic energy of the water body, then the kinetic energy is released when the water body is reset, the energy dissipation part is particularly suitable for wavy vibration, and meanwhile, when the energy dissipation grid plates are arranged, the grid plates are arranged at different angles, so that each energy dissipation grid plate can apply vibration with different amplitudes to the floating frame main body.
Meanwhile, the rotating shafts can be provided with parallelogram synchronous driving structures, so that the rotating shafts are linked through the synchronous driving structures, the acting force exerted on each energy dissipation grid plate is different when the energy dissipation grid plates receive impact, and the energy dissipation grid plates are linked through the connecting rods and the synchronous rods, so that the kinetic energy of each energy dissipation grid plate can be mutually offset, and internal energy dissipation is achieved; further aiming at the energy dissipation structure, springs are arranged at four end points of the synchronous driving structure of the parallelogram, the elastic coefficients of two springs at opposite angles are the same, so that the two springs at the opposite angles stretch synchronously, and the springs at the two opposite angles are a top spring and a tension spring according to the position of the energy dissipation grid plate; wherein the top spring is compressed, and the extension spring is extruded to increased holistic energy dissipation effect, the while elasticity coefficient is the same, overall structure symmetry, stable in structure ensures the stability of floating the frame.
Therefore, the dam body is novel in structure, the wave absorption and energy absorption layer is arranged to protect the surface of the dam body, and the wave absorption and energy absorption layer is used as a buffer layer, so that the density degree of the wave crests of transverse waves and longitudinal waves can be effectively reduced, the intensity level of the transverse waves and the longitudinal waves on the gravity dam after action can be reduced, a more reasonable anti-seismic structure can be further realized in the gravity dam, the superposition of the bedrock and the cementing surface of the dam heel of the gravity dam can be better protected, the probability of the occurrence of a slip crack surface is reduced, the anti-slip stability of the gravity dam is indirectly improved, meanwhile, the floating energy dissipation mechanism is used for further protecting the horizontal plane of an upstream water body, the problem of dam body vibration caused by the transverse waves and the longitudinal waves of upstream reservoir water is effectively solved, the influence of the dam body by vibration caused by water body impact is reduced, and the stability of the dam body is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of one embodiment of the floating frame.
FIG. 3 is a schematic structural view of another embodiment of the floating frame
Fig. 4 is a schematic front view of the floating energy-dissipating mechanism.
Figure 5 is a schematic top view of the floating energy dissipation mechanism.
Figure 6 shows one arrangement of energy dissipating grids.
Fig. 7 is a schematic diagram of a synchronous driving structure.
Fig. 8 is a top view of a synchronous drive configuration.
Fig. 9 is a schematic structural diagram of a further embodiment of the synchronous driving structure.
Fig. 10 is another action diagram of fig. 9.
FIG. 11 is a schematic view of the downstream dam segment structure.
FIG. 12 is a schematic view of an upstream dam segment structure.
FIG. 13 is a schematic diagram of a wave-absorbing structure of the wave-absorbing layer.
The reference numbers in the figures are: the dam comprises a dam body 1, a wave-absorbing energy-absorbing layer 2, a fixed anchor rod 3, a fixed seat 4, a guide steel wire 5, a floating frame 6, a guide sleeve 7, a side plate 8, an energy-dissipating grid plate 9, a shaft sleeve 10, a rotating shaft 11, a mounting plate 12, a guide seat 13, a connecting rod 14, a synchronizing rod 15, a tension spring 16, a top spring 17, a fixing plate 18, an initial transverse wave 19, a transverse wave passing through a wave-absorbing energy-absorbing material 20, an initial longitudinal wave 21 and a longitudinal wave passing through a wave-absorbing energy-absorbing material 22.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1: the embodiment aims to provide a wave-absorbing and energy-absorbing protection framework for improving the seismic performance of a concrete dam, which is mainly used for wave-absorbing and energy-absorbing of the gravity dam, aims at the vibration of the gravity dam caused by shock waves brought by upstream reservoir water and seismic waves brought by earthquake under the condition of normal operation of the current gravity dam, enables the dam to crack and expand at the weakest part of the dam body, and endangers the problem of safety and stability of the dam.
As shown in fig. 1, the present embodiment provides a wave-absorbing energy-absorbing protective framework for improving the seismic performance of a concrete dam, which includes a wave-absorbing energy layer 2 and a floating energy-absorbing mechanism, wherein the wave-absorbing energy layer 2 is disposed on the surface layer of a gravity dam 1, and the wave-absorbing energy layer 2 is specifically covered and continuously disposed on the surface of the dam body and the foundation; the wave absorption layer is any one of cast-in-place foam concrete, rubber concrete, steel fiber concrete and plastic concrete.
In this embodiment, a layer of wave-absorbing and energy-absorbing material (such as cast-in-place foam concrete, rubber concrete, steel fiber concrete, plastic concrete, etc.) is added around the concrete gravity dam; a layer of wave-absorbing and energy-absorbing material is required to be arranged at the foundation of the gravity dam; when the anti-seepage curtain is constructed, consolidation grouting is firstly adopted, and then curtain grouting is carried out. During the consolidation grouting, the thin slurry is used firstly, then the consistency of the slurry is gradually increased, simultaneously the slurry with wave absorption and energy absorption is added, and finally curtain grouting is adopted.
This embodiment divides the concrete gravity dam into two dam sections with it: no. 1-6 and No. 8-10 dam sections are water retaining dam sections, and No. 7 dam section is overflow dam section. When the gravity dam works normally, the corresponding requirements of different parts of the dam body are different, so that the requirements of materials for absorbing energy of wave are different under the conditions of different parts and different working conditions. The concrete gravity dam is wrapped in a wave-absorbing energy-absorbing material in all aspects, the water-retaining dam section is divided into five subareas, the overflow dam section is divided into four subareas, different concretes are poured in the subareas, the concretes are matched with the actual conditions in the aspects of strength, impermeability, frost resistance and scour resistance, certain adjustment is made according to the construction site, in the overflow dam section, the concrete can be seen through vertical drawings of upstream and downstream, two sides of the whole dam section also comprise two parts, namely a side pier and a retaining wall, the side pier and the retaining wall are provided with wave-absorbing energy-absorbing layers, and a continuous surface anti-seismic structure is formed.
The dam body comprises an overflow dam section and a water retaining dam section, concrete partitions of the four dam bodies in front of the water retaining dam section are wave absorbing and energy absorbing layers, the poured thickness is 0.5m-1m, and the V-th partition is made of roller compacted concrete; the concrete partitions of the first three dam bodies of the overflow dam section are wave-absorbing energy-absorbing layers, and the range of the poured thickness is 0.5m-1 m; most of the selected overflow surfaces of the overflow dam sections are irregular, and WES-shaped section curves are selected, so that the thickness of the top end is rounded as much as possible.
As can be seen from figure 1, the subareas of the concrete and the thickness of the poured concrete are firstly contacted with the rock stratum by the wave-absorbing energy-absorbing material from the base rock surface of the dam heel when the whole gravity dam is filled, the concrete of the wave-absorbing energy-absorbing material poured in the layer can reduce the influence of seismic waves on the vibration of the gravity dam, then the gravity dam is poured upwards, because the upstream scouring capability is strong, most of the impact energy and the waves come from the upstream, the influence on the vibration of the dam is reduced by the wave-absorbing energy-absorbing material, the influence on the wave of the downstream dam surface is smaller, compared with the upstream dam surface, the thickness of the wave-absorbing energy-absorbing material poured in the downstream dam surface is smaller, then the dam top of the gravity dam is filled, the size of the thickness of the concrete required to be poured is in the range of 0.5m-1m according to the specification, and the overflow dam section also comprises a retaining wall and a side pier, the two blocks are also filled with materials for absorbing energy by absorbing wave, and finally slurry for absorbing energy by absorbing wave is added into the anti-seepage curtain, compared with the traditional consolidation grouting, the grouting method is different from the traditional consolidation grouting in that slurry is poured in the first step, better seepage is carried out on joint cracks and fault fracture zones of the foundation, the integrity of the bedrock is better improved, and the next step is to pour the slurry for absorbing energy by absorbing wave, so that the damage of seismic wave to the whole dam is effectively reduced, the water permeability of the foundation can be reduced, the consistency of the slurry is gradually increased, and finally curtain grouting is carried out, so that the seepage flow of the dam foundation is reduced.
After grouting is finished, the whole wave-absorbing and energy-absorbing material can form a sealed whole around the gravity dam, and can play a corresponding protective measure when facing the transverse waves and the longitudinal waves of the upstream reservoir water to the gravity dam and the seismic waves caused by earthquakes; as shown in fig. 13, when the transverse wave and the longitudinal wave act on the wave-absorbing energy-absorbing material, the wave crests of the transmitted transverse wave and the transmitted longitudinal wave are reduced, so that the vibration of the gravity dam caused by the wave is reduced, when the seismic wave caused by the earthquake acts on the anti-seepage curtain and the dam base surface, the wave-absorbing energy-absorbing material can achieve the same effect, the influence of the vibration of the gravity dam caused by the wave and other factors is reduced by the wave-absorbing energy-absorbing material, the maintenance and reinforcement tasks of the gravity dam are reduced, and the safety of the gravity dam is further enhanced.
The floating energy dissipation mechanism comprises a guide steel wire 5, a fixed anchor rod 3, a fixed seat 4, a floating frame 6 and an energy dissipation grid plate 9; the fixed anchor rod 3 and the fixed seat 4 play a role of fixed support, wherein the fixed anchor rod 3 is anchored on a foundation, the fixed seat 4 is fixed on the upper part of the dam body 1, and the upper end and the lower end of the guide steel wire 5 are respectively fixed on the fixed seat and the fixed anchor rod.
The fixing base is fixed on the upper portion of dam body through adjusting the seat, it includes alignment jig, an adjusting cylinder, adjusts pole and adjusting wire to adjust the seat, the alignment jig is fixed on the upper portion of dam body, the upper and lower of alignment jig is provided with corresponding an adjusting cylinder, wherein go up the adjusting cylinder and fix on the upper portion of alignment jig, the outside of lower adjusting cylinder is square tubular construction, and the suit is on the alignment jig, and can slide along the alignment jig, inside is provided with the internal thread, it is provided with the internal thread that screw thread opposite direction in the section of thick bamboo to go up adjusting cylinder and the lower adjusting cylinder, the upper and lower side of adjusting the pole is provided with corresponding and screw thread opposite direction's screw thread section, the adjusting wire is fixed at the middle part of adjusting the pole, the upper and lower both ends of guide steel wire are fixed respectively on adjusting cylinder and the fixed stock down, can adjust the tensioning degree of guide steel wire.
The rear side of the floating frame 6 is provided with a guide sleeve 7, the guide sleeve 7 is sleeved on the guide steel wire 5, and the floating frame 6 floats on the water surface and can move up and down along the guide steel wire along with the rise and fall of the water level; utilize this structure can make the frame of floating in the horizontal plane department all the time, during the concrete implementation, this example utilizes fixed stock and ground fixed, and fixing base and dam body upper portion are fixed to install the guide steel wire between fixed stock and fixing base and form the bottom and go deep into under water, the guide structure above the water level is stretched out on upper portion, and this guide structure sets up the multiunit, and has set up the frame of floating as fixed basis with it.
The embodiment is provided with the wave absorption energy layer for protecting the surface of the dam body, the wave absorption energy layer is used as a buffer layer, the wave crest of transverse waves and the density degree of longitudinal waves can be effectively reduced, the intensity grade of the transverse waves and the longitudinal waves caused by action on the gravity dam can be reduced, a more reasonable anti-seismic structure can be further played in the gravity dam, the superposition of bedrock and a cementing surface of a dam heel of the gravity dam can be better protected, the probability of a slip crack surface is reduced, the anti-slip stability of the gravity dam is indirectly improved, meanwhile, the floating energy dissipation mechanism is used for further protecting the horizontal plane of an upstream water body, the problem of the vibration of the dam body caused by the transverse waves and the longitudinal waves caused by upstream reservoir water is effectively solved, the influence of the vibration caused by water body impact on the dam body is reduced, and the stability of the dam body is improved.
Example 2: this example is substantially the same as example 1, except that: the present embodiment provides a torsion spring at the rotating shaft.
The mounting panel is provided with corresponding shaft hole in this embodiment, and axle sleeve 10 about the shaft hole endotheca, the pivot passes through the torsional spring to be installed in axle sleeve 10.
In the energy dissipation part, the torsion spring is arranged at the rotating shaft, the torsion spring is used for absorbing and storing initial kinetic energy of the water body, then the kinetic energy is released when the torsion spring is reset, the torsion spring is particularly suitable for wavy vibration, two ends of the torsion spring are fixed in the rotating shaft and the shaft sleeve, and the inclination angle of the energy dissipation grid plate is arranged in an initial state, so that when the water body fluctuates, the energy dissipation grid plate can be impacted, the impact causes the energy dissipation grid plate to rotate directionally, and the torsion force of the torsion spring is overcome to apply work to consume the kinetic energy of the water body.
And when further implementing, the energy dissipation grid plates 9 are in different inclination angles respectively under the torsional spring initial state, and each energy dissipation grid plate 9 can apply vibration of different amplitudes to the floating frame main body.
Example 3: this example is substantially the same as example 1, except that: the present embodiment is directed to providing a guide base 13 in the floating frame 6.
As shown in fig. 5, the floating frame 6 has a U-shaped structure, the mounting plate 12 is disposed at the opening, the guide base 13 is disposed on the rear side wall of the floating frame, and the guide base 13 is located on the midperpendicular of the two rotating shafts.
In this embodiment, the water flow impacts the energy dissipation grid plates 9, enters the floating frame from the gap between the two energy dissipation grid plates 9, acts on the guide seat 13, and flows to two sides by using the guide seat 13, so that the water flow has a drainage function, and the entering water flow and the discharged water flow are converged to reduce kinetic energy.
Example 4: this example is substantially the same as example 1, except that: this embodiment further illustrates the structure of the floating frame.
The floating frames 6 are arranged in a plurality of groups side by side, and the rear side of each group of floating frames is provided with two guide steel wires; the adjacent floating frames have a gap therebetween or are fixedly connected together by side plates 8.
In this embodiment, there is the clearance or connect side by side between the frame 6 floats, to different water level characteristics, can the pertinence set up, sets for according to site environment.
Example 5: this example is substantially the same as example 1, except that: the present embodiment provides a synchronous drive structure.
As shown in fig. 7-10, the rotating shaft 11 protrudes from the mounting plate 12 and is located on the same horizontal line, the end of the rotating shaft 11 is fixed with a connecting rod 14, two ends of the connecting rod 14 are hinged with synchronizing rods 15, the synchronizing rods 15 are parallel to the connecting line of the rotating shaft, and a parallelogram synchronous driving structure is formed, so that the rotating shafts are linked through the synchronous driving structure.
In the embodiment, the rotating shafts are provided with the parallelogram synchronous driving structures, so that the rotating shafts are linked through the synchronous driving structures, the acting force borne by each energy dissipation grid plate is different when the energy dissipation grid plate receives impact, and the energy dissipation grid plates are linked through the connecting rods and the synchronous rods, so that the kinetic energy of each energy dissipation grid plate can be mutually offset, and internal energy dissipation is achieved.
When the energy dissipation grid plate is further implemented, springs are arranged at four end points of the synchronous driving structure, the outer ends of the springs are fixed on the fixing plate, the elastic coefficients of the two diagonal springs are the same, the springs are arranged at the four end points of the synchronous driving structure of the parallelogram, the elastic coefficients of the two diagonal springs are the same, so that the two diagonal springs synchronously extend and retract, and according to the position of the energy dissipation grid plate, the two diagonal springs are a group of top springs 17, and the other group of top springs is a tension spring 18; when carrying out the energy dissipation, the top spring is compressed, and the extension spring is extruded to increased holistic energy dissipation effect, the elasticity coefficient is the same simultaneously, overall structure symmetry, stable in structure ensures the stability of floating the frame.
Claims (10)
1. The utility model provides an improve concrete dam anti-seismic performance's wave absorption energy-absorbing protection framework which characterized in that: comprises a wave-absorbing energy-absorbing layer and a floating energy-dissipating mechanism; covering and continuously arranging wave-absorbing and energy-absorbing layers on the surface of the dam body and the foundation; the floating energy dissipation mechanism comprises a guide steel wire, a fixed anchor rod, a fixed seat, a floating frame and an energy dissipation grid plate; the fixed anchor rod is anchored on the foundation, the fixed seat is fixed on the upper part of the dam body, and the upper end and the lower end of the guide steel wire are respectively fixed on the fixed seat and the fixed anchor rod; the rear side of the floating frame is provided with a guide sleeve which is sleeved on a guide steel wire, and the floating frame floats on the water surface and can move up and down along the guide steel wire along with the rise and fall of the water level; the upper side and the lower side of the floating frame are provided with mounting plates, and the middle parts of the upper side and the lower side of the energy dissipation grid plate are provided with rotating shafts which are rotatably arranged on the mounting plates.
2. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 1, wherein: the mounting panel is provided with corresponding shaft hole, axle sleeve about the shaft hole endotheca, and the pivot is installed in the axle sleeve through the torsional spring.
3. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam as claimed in claim 2, wherein: the floating frame is of a U-shaped structure, the mounting plate is arranged at the opening, the rear side wall of the floating frame is provided with a guide seat, and the guide seat is positioned on the perpendicular bisector of the two rotating shafts.
4. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 1 or 2, wherein: the floating frames are arranged in parallel, and two guide steel wires are arranged on the rear side of each group of floating frames; the adjacent floating frames are in clearance or fixedly connected together through side plates.
5. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 1, wherein: the pivot protrusion and mounting panel to be located same water flat line, the end of pivot is fixed with the connecting rod, and the both ends of connecting rod articulate there is the synchronizing bar, the synchronizing bar is parallel with the pivot line, has formed parallelogram's synchronous drive structure, makes each pivot pass through the linkage of synchronous drive structure.
6. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 2 or 5, wherein: and each energy dissipation grid plate is respectively positioned at different inclination angles in the initial state of the torsion spring.
7. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 5, wherein: the four end points of the synchronous driving structure are provided with springs, the outer ends of the springs are fixed on the fixing plate, and the elastic coefficients of the two springs at opposite angles are the same.
8. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 1, wherein: the wave absorption layer is any one of cast-in-place foam concrete, rubber concrete, steel reinforced concrete and plastic concrete.
9. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 1, wherein: the dam body comprises an overflow dam section and a water retaining dam section, the water retaining dam section is divided into five subareas, the overflow dam section is divided into four subareas, concrete subareas of the four dam bodies in front of the water retaining dam section are wave-absorbing energy-absorbing layers, the poured thickness is 0.5m-1m, and the V-th subarea is made of roller compacted concrete; the concrete partitions of the first three dam bodies of the overflow dam section are wave-absorbing energy-absorbing layers, and the range of the poured thickness is 0.5m-1 m.
10. The wave-absorbing energy-absorbing protective framework capable of improving the seismic performance of the concrete dam according to claim 1, wherein: two sides of the dam body also comprise side piers and retaining walls; the side piers and the retaining wall are provided with wave-absorbing energy-absorbing layers and form a continuous surface anti-seismic structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110999026.1A CN113882331B (en) | 2021-08-28 | 2021-08-28 | Wave-absorbing energy-absorbing protection framework capable of improving anti-seismic performance of concrete dam |
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| CN202110999026.1A CN113882331B (en) | 2021-08-28 | 2021-08-28 | Wave-absorbing energy-absorbing protection framework capable of improving anti-seismic performance of concrete dam |
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| CN113882331A true CN113882331A (en) | 2022-01-04 |
| CN113882331B CN113882331B (en) | 2022-10-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1654436A1 (en) * | 1987-12-08 | 1991-06-07 | Институт Сейсмостойкого Строительства И Сейсмологии Ан Таджсср | Method for protecting plain earth dam against earthquakes |
| CN107988999A (en) * | 2017-11-08 | 2018-05-04 | 三峡大学 | A kind of hydrodynamic force lifts falling zone Wetland ecological governing system and its construction method certainly |
| CN210827308U (en) * | 2019-08-08 | 2020-06-23 | 董峻 | Combined energy-buffering breakwater |
| CN213805251U (en) * | 2020-11-26 | 2021-07-27 | 郑州大学 | Ultra-high performance concrete-common concrete composite gravity dam |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1654436A1 (en) * | 1987-12-08 | 1991-06-07 | Институт Сейсмостойкого Строительства И Сейсмологии Ан Таджсср | Method for protecting plain earth dam against earthquakes |
| CN107988999A (en) * | 2017-11-08 | 2018-05-04 | 三峡大学 | A kind of hydrodynamic force lifts falling zone Wetland ecological governing system and its construction method certainly |
| CN210827308U (en) * | 2019-08-08 | 2020-06-23 | 董峻 | Combined energy-buffering breakwater |
| CN213805251U (en) * | 2020-11-26 | 2021-07-27 | 郑州大学 | Ultra-high performance concrete-common concrete composite gravity dam |
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