CN213805251U - Ultra-high performance concrete-common concrete composite gravity dam - Google Patents
Ultra-high performance concrete-common concrete composite gravity dam Download PDFInfo
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- CN213805251U CN213805251U CN202022767279.XU CN202022767279U CN213805251U CN 213805251 U CN213805251 U CN 213805251U CN 202022767279 U CN202022767279 U CN 202022767279U CN 213805251 U CN213805251 U CN 213805251U
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- 239000004567 concrete Substances 0.000 title claims abstract description 33
- 230000005484 gravity Effects 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims abstract description 11
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 239000011374 ultra-high-performance concrete Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of the building, relate to the civil engineering technique in the aspect of the water conservancy, specifically be a compound gravity dam of ultra high performance concrete-ordinary concrete. In order to solve the damage of tensile stress, compressive stress to the dam body during manger plate and earthquake, the utility model discloses a technical scheme be, a compound gravity dam of ultra high performance concrete-ordinary concrete, including dam body and basic dam, the dam body on be provided with dam heel, dam head and roll over slope department, dam heel and dam head roll over slope department and all be provided with first recess, be provided with the enhancement layer in the first recess. The protective layer doped with steel fiber ultra-high performance concrete (UHPC) is arranged on the surface of the dam body, so that the impermeability, the anti-seismic bearing capacity and the durability of the concrete gravity dam are obviously improved.
Description
Technical Field
The utility model belongs to the technical field of the building, relate to the civil engineering technique in the aspect of the water conservancy, specifically be a compound gravity dam of ultra high performance concrete-ordinary concrete.
Background
In recent years, the construction of water conservancy infrastructure in China is developed rapidly. Among them, the reservoir dam plays an important role in national economic development, and has a great impact on agricultural development, industrial construction and production and life of common people. As an old dam with wide application, the gravity dam is mainly maintained to be stable by means of the anti-slip force generated by the dead weight of a dam body. Before the 19 th century, gravity dams were basically built with grouted rubble; in the 20 th century, modern concrete gravity dams are gradually formed. The gravity dam has simple structure, convenient construction, strong flood resistance and strong capacity of resisting accidents such as war damage and the like, and is still widely adopted so far.
Because the concrete gravity dam is large in volume and large in cement consumption, hydration heat and hardening shrinkage of concrete in a construction period can generate unfavorable temperature stress and shrinkage stress, and strict temperature control heat dissipation measures are generally adopted. Many projects develop cracks due to improper temperature control, and some even form harmful cracks, thereby weakening the overall performance of the dam. And the dam body concrete is exposed in water flow and various aggressive media for a long time and can be gradually corroded and damaged, the peripheral concrete is cracked and even peeled off, the water flow leakage problem is caused, and finally the dam body is damaged and destroyed.
In concrete gravity dams, high stress is often generated only in local areas, and the stress is not high in most areas. When water is normally retained, large tensile stress is easily generated at the dam heel and the dam toe, and large tensile stress may occur at the slope breaking position of the dam head when an earthquake occurs. Under a large load, a local area of the dam body is likely to exceed the allowable stress and crack or crush.
SUMMERY OF THE UTILITY MODEL
In order to solve the damage of tensile stress and compressive stress to the dam body during water retaining and earthquake, the utility model discloses a compound gravity dam of ultra high performance concrete-ordinary concrete is through setting up the protective layer that adds steel fibre Ultra High Performance Concrete (UHPC) on the dam body surface, is showing the impermeability, the antidetonation bearing capacity and the durability that improve concrete gravity dam.
The utility model discloses a technical scheme be, a compound gravity dam of ultra high performance concrete-ordinary concrete, including dam body and basic dam, the dam body on be provided with dam heel, dam head and roll over slope department, dam heel and dam head roll over slope department and all be provided with first recess, be provided with the enhancement layer in the first recess.
The dam body on still be provided with the highest water level of upstream side and dam body contact surface, the highest water level of downstream side and dam body contact surface, the highest water level of upstream side and dam body contact surface and the highest water level of downstream side and dam body contact surface all be provided with the second recess, be provided with the protective layer in the second recess.
And a reinforcing mesh is arranged in the reinforcing layer.
The protective layer is internally provided with shear steel bars.
The thickness of the reinforcing layer is 1.5-2.5 m.
The thickness of the protective layer is 30-70 mm.
The utility model has the advantages that:
the reinforced layer and the protective layer are both made of ultra-high performance concrete (UHPC) doped with steel fibers, the gravity dam is a concrete gravity dam, the base material is cement, the compatibility between the two materials is good, and the respective advantages can be fully exerted when the two materials work together.
The traditional concrete gravity dam is easy to face the problem of water leakage during service, influences the exertion of engineering benefits and even shortens the service life of the engineering. The ultra-high performance concrete has a compact structure and extremely small porosity, and is specifically characterized in that durability indexes such as chloride ion permeation resistance and sulfate corrosion resistance are improved by multiple times or even orders of magnitude compared with the traditional concrete in a crack-free state, and the water absorption porosity is only about 1/13 of the traditional concrete. And the addition of the steel fiber can inhibit and restrict the formation and development of UHPC microcracks and obviously improve the cracking resistance of the UHPC. The UHPC is used on the contact surface of the dam body and upstream and downstream water flows, so that the ultrahigh durability of the UHPC can be fully exerted, and the service life of the dam is greatly prolonged.
The compressive strength of the ultra-high performance concrete is higher than 150MPa, which is about 3 times of that of the traditional concrete. When the dam toe is used at the position of the dam toe (the contact surface of the downstream highest water level and the dam body) which is easy to generate large pressure stress, the pressure resistance of the dam toe can be obviously improved.
When water is retained normally, large tensile stress is easily generated at the dam heel; under the action of earthquake, the slope fold of the dam head may have larger tensile stress. The UHPC is used at the two positions and is provided with the reinforcing steel bars, so that the tensile property of the dam heel and the slope fold position of the dam head can be greatly improved, the damage degree of the dam body at the position can be reduced, the dam body can be prevented from generating penetrating cracks, and the seismic resistance of the dam can be obviously improved.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the drawing, 1 is a dam body, 2 is an upstream side highest water level and dam body contact surface, 3 is a dam heel, 4 is a dam head slope-folding part, 5 is a downstream side highest water level and dam body contact surface, 6 is shear-resistant steel bars, 7 is a steel bar mesh, 8 is a base dam, 9 is an upstream highest water level, and 10 is a downstream highest water level.
Detailed Description
The ultra-high performance concrete-common concrete composite gravity dam comprises a dam body 1 and a foundation dam 8, wherein a dam heel 3 and a dam head slope folding part 4 are arranged on the dam body 1, first grooves are formed in the dam heel 3 and the dam head slope folding part 4, and reinforcing layers are arranged in the first grooves. The reinforcing mesh 7 is arranged in the reinforcing layer, and the thickness of the reinforcing layer is 1.5-2.5 m.
The upstream maximum water level 9 and the downstream maximum water level 10 are the water flow reference levels. The dam body 1 is further provided with an upstream side highest water level and dam body contact surface 2 and a downstream side highest water level and dam body contact surface 5, the upstream side highest water level and dam body contact surface 2 and the downstream side highest water level and dam body contact surface 5 are both provided with second grooves, and protective layers are arranged in the second grooves. The protective layer is internally provided with shear steel bars 6, and the thickness of the protective layer is 30-70 mm.
The utility model discloses when concrete construction:
the method comprises the following steps: densely distributing a reinforcing mesh 7 at the dam heel 3, vertically arranging a side die, pouring UHPC inwards, pouring the height of about 2m (the specific size is based on the actual engineering), and performing high-temperature steam curing. The curing conditions are required to meet the requirements, and the specific curing conditions are that the curing time is not less than 72 hours when the curing temperature is constant at 80-90 ℃; when the curing temperature is constant at 90-100 ℃, the curing time is not less than 48 h; the relative humidity in the curing environment is not lower than 95%.
Step two: and after the position of the dam heel 3 is built, a gravity dam body 1 is built according to a conventional method, and concrete is poured.
Step three: a first groove with the thickness of about 2m is reserved at a dam head slope fold 4, second grooves with the thickness of about 50mm are reserved at a water flow upstream side highest water level and dam body contact surface 2 and a water flow downstream side highest water level and dam body contact surface 5, a plurality of shear steel bars are implanted into concrete in the two grooves along the height direction and the width direction of the dam body 1, the length of the part of the shear steel bars extending out of the surface of the concrete dam body 1 is about 20mm, and the horizontal distance and the longitudinal distance of adjacent shear steel bars are about 50-250mm (the specific size is based on actual engineering).
The dam head slope fold 4 adopts the same method for constructing the dam heel 3, namely densely distributing the reinforcing mesh 7, pouring UHPC and carrying out high-temperature steam curing.
And the reserved second grooves of the contact surface 2 of the highest water level on the upstream side of the water flow and the dam body and the contact surface 5 of the highest water level on the downstream side of the water flow and the dam body are roughened. The UHPC is evenly coated on the surface of the concrete dam body 1 implanted with the shear steel bars 6, and the UHPC is required to completely coat the part of the shear steel bars 6 extending out of the surface of the concrete dam body 1. And (5) after finishing the coating, performing high-temperature steam curing.
Step four: and then the construction of the rest part of the dam body 1 is continuously completed. And ending the whole construction process.
Claims (6)
1. The utility model provides an ultra high performance concrete-ordinary concrete compound gravity dam, includes dam body (1) and basic dam (8), dam body (1) on be provided with dam heel (3), dam head slope folding department (4), its characterized in that: the dam heel (3) and the dam head slope folding part (4) are provided with first grooves, and reinforcing layers are arranged in the first grooves.
2. The ultra-high performance concrete-ordinary concrete composite gravity dam of claim 1, wherein: the dam body (1) is further provided with an upstream side highest water level and dam body contact surface (2) and a downstream side highest water level and dam body contact surface (5), the upstream side highest water level and dam body contact surface (2) and the downstream side highest water level and dam body contact surface (5) are respectively provided with a second groove, and a protective layer is arranged in each second groove.
3. The ultra-high performance concrete-ordinary concrete composite gravity dam of claim 1, wherein: and a reinforcing mesh (7) is arranged in the reinforcing layer.
4. The ultra-high performance concrete-ordinary concrete composite gravity dam of claim 2, wherein: the protective layer is internally provided with shear steel bars (6).
5. The ultra-high performance concrete-ordinary concrete composite gravity dam of claim 1, wherein: the thickness of the reinforcing layer is 1.5-2.5 m.
6. The ultra-high performance concrete-ordinary concrete composite gravity dam of claim 2, wherein: the thickness of the protective layer is 30-70 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022767279.XU CN213805251U (en) | 2020-11-26 | 2020-11-26 | Ultra-high performance concrete-common concrete composite gravity dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022767279.XU CN213805251U (en) | 2020-11-26 | 2020-11-26 | Ultra-high performance concrete-common concrete composite gravity dam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213805251U true CN213805251U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022767279.XU Expired - Fee Related CN213805251U (en) | 2020-11-26 | 2020-11-26 | Ultra-high performance concrete-common concrete composite gravity dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213805251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882331A (en) * | 2021-08-28 | 2022-01-04 | 黄河水利职业技术学院 | Wave-absorbing energy-absorbing protection framework capable of improving anti-seismic performance of concrete dam |
-
2020
- 2020-11-26 CN CN202022767279.XU patent/CN213805251U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882331A (en) * | 2021-08-28 | 2022-01-04 | 黄河水利职业技术学院 | Wave-absorbing energy-absorbing protection framework capable of improving anti-seismic performance of concrete dam |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210727 |