CN108798566B - Self-elastic hydraulic slag removing device for bored pile and construction method thereof - Google Patents
Self-elastic hydraulic slag removing device for bored pile and construction method thereof Download PDFInfo
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- CN108798566B CN108798566B CN201810752895.2A CN201810752895A CN108798566B CN 108798566 B CN108798566 B CN 108798566B CN 201810752895 A CN201810752895 A CN 201810752895A CN 108798566 B CN108798566 B CN 108798566B
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- 239000002893 slag Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000013049 sediment Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 239000002002 slurry Substances 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
- E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
A self-elastic hydraulic slag removing device for a bored pile and a construction method thereof belong to the technical field of pile foundation construction in the building field. The device comprises an upper cavity cylinder, a lower cavity cylinder and an ejector, wherein the upper cavity cylinder comprises an upper cavity cylinder entity, the upper surface of the upper cavity cylinder entity is provided with an upper round cover plate, and the lower part of the upper cavity cylinder entity is provided with a self-locking device and a supporting rod mounting hole; the lower cavity cylinder comprises a lower cavity cylinder entity, and a lower round cover plate is arranged on the lower surface of the lower cavity cylinder entity; the catapult comprises a base and a lower support rod arranged on the base, wherein the lower support rod is sleeved with an upper support rod, a reserved side hole is formed in the outer side of the upper support rod, a spring a is arranged on the upper support rod, a spring b is arranged on the lower support rod, the upper support rod is connected with an upper cavity cylinder and a lower cavity cylinder and is fixed through a self-locking device, and the diameter of the lock rod is matched with the inner diameter of the reserved side hole. The device has the advantages of simple structure, small volume, convenient transportation and operation, no need of other external force auxiliary equipment, and only one operator can realize the whole process slag removal work.
Description
Technical Field
The invention belongs to the technical field of pile foundation construction in the building field, and particularly relates to a self-elastic hydraulic slag removal device for a bored pile and a construction method thereof.
Background
In recent years, the bored pile is widely applied to the field of foundation pit support and pile foundation construction in various building engineering because of the advantages of wide application range, high single pile bearing capacity, low construction noise, low cost, convenient construction and the like. With the increasing of high-rise buildings, the requirements on pile foundation bearing capacity are also increasing. However, due to the specificity of the construction process of the bored pile, the bearing capacity of the bored pile is greatly influenced by factors in construction, and particularly the slag layer at the bottom of the hole seriously influences the exertion of the bearing capacity of the pile foundation. According to the specification of building pile foundation technical specification, the control standard of the pile bottom sediment thickness of the bored pile is as follows: the end-bearing pile should not be greater than 50mm; friction piles should not be greater than 100mm. In order to ensure that the standard requirement is met, the control of the thickness of the sediment at the bottom of the reinforced hole in the construction process becomes one of the key problems of the construction quality of the bored pile and the bearing capacity of the pile foundation.
At present, a secondary slurry hole cleaning method is mainly adopted for the bored pile, namely, the first sediment treatment is to replace poor slurry in the hole by adopting a slurry pump to press new slurry through a conduit after the hole operation reaches a preset depth, and the in-situ soil discharging operation is continued until sediment near the hole bottom is cleaned, the treatment can only clean most of coarse granular soil, then a reinforcement cage and a pouring conduit are arranged, and the slurry small granular sediment in a static period is slowly sunk into the hole bottom due to longer working procedure time; the other method adopts the reverse circulation of gas lift, the compressed air generated by the air compressor is sent into the water outlet pipe of the clear hole through the air supply pipe to be mixed with the mud in the hole, the serious difference of the mud in the water outlet pipe and the mud in the pipe is generated, under the action, the mud in the pipe flows upwards along the water outlet pipe to form mud outside the hole and sediment which flows out of the pile along the water outlet pipe upwards, and new mud is continuously supplied into the hole for replacement, so that the purpose of clear hole is achieved, but the mud removal of the pile within 10 meters is not thorough, the slag removal speed is slow, the auxiliary equipment of the air compressor is also required to be increased, the manpower and material resources are greatly increased, the construction cost is increased, and meanwhile, the operation time is not effectively reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a self-elastic hydraulic slag removing device for a bored pile and a construction method thereof.
The self-ejection type hydraulic slag removing device for the bored pile is characterized by comprising an upper cavity cylinder, a lower cavity cylinder and an ejector, wherein the upper cavity cylinder comprises an upper cavity cylinder entity, the upper surface of the upper cavity cylinder entity is provided with an upper round cover plate, and the lower part of the upper cavity cylinder entity is provided with a self-locking device and a supporting rod mounting hole; the lower cavity cylinder comprises a lower cavity cylinder entity, a lower round cover plate is arranged on the lower surface of the lower cavity cylinder entity, and bolt reserved holes a and bolt reserved holes b are symmetrically arranged at the upper and lower positions of the two side surfaces of the lower cavity cylinder entity; the catapult comprises a base and a lower support rod arranged on the base, wherein the lower support rod is sleeved with an upper support rod, a reserved side hole is formed in the outer side of the upper support rod, a spring a is arranged on the upper support rod, a spring b is arranged on the lower support rod, the upper support rod sequentially penetrates through a bolt reserved hole b, a support rod mounting hole and the bolt reserved hole a from bottom to top to connect an upper cavity cylinder with a lower cavity cylinder, the upper support rod is fixedly connected with the reserved side hole through a self-locking device, and the diameter of the lock rod is matched with the inner diameter of the reserved side hole.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that an upper cavity cylinder entity is a cavity cylinder, an upper opening of the upper cavity cylinder entity is parallel and is in a closing shape, the bottom of the cavity cylinder is turned inwards to form a lower inner flanging, and the gap distance between the lower inner flanging and the side wall of the cylinder is larger than the thickness of the upper cavity cylinder entity; the lower cavity cylinder entity is a cavity cylinder, the upper part of the cavity cylinder is turned outwards to form an upper part turned-over edge, the gap between the upper part turned-over edge and the side wall of the cylinder is larger than the thickness of the lower cavity cylinder entity, and the lower part turned-over edge and the upper part turned-over edge are mutually buckled and matched.
A bored pile self-elastic hydraulic slag removal device, its characterized in that goes up cavity cylinder entity lateral wall and corresponds the position and be equipped with the trompil, the trompil is located branch mounting hole one side, self-locking device includes hold-down spring and locking lever, hold-down spring one end is fixed in the trompil, the other end is connected with the locking lever, when hold-down spring is in normal state, the total length of hold-down spring and locking lever is greater than the distance between cavity cylinder entity lateral wall and the branch mounting hole.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that an installation seat is arranged at the bottom of a cylindrical entity of the lower cavity, the installation seat is arranged above a spring b, an opening is arranged in the installation seat, and a lower round cover plate is arranged on the installation seat and matched with the opening.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that bolt reserved holes b are symmetrically formed in two sides of a mounting seat, bolt reserved holes a are symmetrically formed in two sides of the bottom surface of an upper flanging of a lower cavity cylindrical entity, the positions of the bolt reserved holes a, a supporting rod mounting hole and the bolt reserved holes b correspond to each other, the bolt reserved holes a are blind holes, the aperture is smaller than the thickness of the upper flanging of the lower cavity cylindrical entity, and the hole depth is 20-30mm.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that the radius of an upper opening of an upper cavity cylindrical entity is 0.5-0.8 times of the radius of the cylinder, the size of an upper round cover plate is matched with that of the upper opening, one side of the upper round cover plate is provided with a cuboid connecting device protruding outwards, a round hole is reserved in the center of the side face of the cuboid, and a movable bolt connecting piece a arranged on the upper portion of the upper cavity cylindrical entity is connected through a pin.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that the mounting seat is a hollow disc, the ratio of the outer circle radius of the hollow disc to the solid radius of the lower cavity cylinder is 1.1-1.3:1, the ratio of the inner circle radius of the hollow disc to the solid radius of the lower cavity cylinder is 0.3-0.4:1, the inner circle size of the hollow disc is matched with a lower round cover plate, one side of the lower round cover plate is provided with an outwards protruding rectangular connecting device, and a circular hole is reserved in the center of the side face of the cuboid and is connected with the mounting seat through a pin.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that the outer end of a lock rod is of a downward slope-shaped structure, the upper end of a lower support rod is provided with a matched slope-shaped structure, and when the lower support rod moves upwards to the outer end of the lock rod, the lock rod can be pushed to move, and the lock rod is withdrawn from a reserved side hole.
The self-elastic hydraulic slag removing device for the bored pile is characterized in that round gaskets are respectively arranged at two ends of a spring a and a spring b.
The construction method of the self-elastic hydraulic slag removal device for the bored pile is characterized by comprising the following steps of:
1) Before use, the upper cavity cylinder is compressed to the bottom of the lower cavity cylinder, so that the self-locking device is ejected to the reserved side hole of the upper support rod at the lower side of the lower cavity cylinder, and the whole device is in a compression locking state;
2) Erecting a triangular bracket, ensuring that the self-elastic hydraulic slag removing device is downwards placed along the center of the steel reinforcement cage, and uniformly placing the self-elastic hydraulic slag removing device to the bottom along the center by utilizing the self weight of the device;
3) When the whole device is lowered to the bottom of a pile hole, the ejector is stopped from moving downwards by the rock and soil at the bottom, the upper device continues to move downwards due to the inertia of gravity, when the slope surface at the top of the lower supporting rod contacts the slope surface of the lock rod of the self-locking device and continues to move upwards, the lock rod is ejected out of the reserved side hole of the upper supporting rod, the self-locking device is opened, the upper cavity cylinder is ejected upwards under the action of the elasticity of the spring a, the cavity volume of the whole device is suddenly increased, the internal and external water pressure differences are generated, the external pressure is higher than the internal pressure principle, the lower round cover plate is ejected, and the lower sediment and water flow are sucked into the upper cavity cylinder and the lower cavity cylinder together;
4) The pile hole is vertically lifted by the whole device manually, under the action of pressure and gravity, the upper round cover plate and the lower round cover plate are covered, sediment and water flow are taken out together and poured into the treatment container device, the operation is repeated after the sediment is cleaned, and the sediment is taken out completely, so that the quick sediment removal is realized.
Compared with the prior art, the self-elastic hydraulic slag removing device for the bored pile and the construction method thereof have the following advantages:
1) The device adopts the combination of the upper round cover plate and the lower round cover plate, the slag removing device sinks under the action of dead weight, the two cover plates are simultaneously and automatically opened through the resistance of water, the sinking speed is improved, after the slag removing device reaches the bottom, the upper round cover plate is automatically triggered to be ejected by the ejector, the upper round cover plate is automatically closed under the resistance of water on the upper surface, the lower round cover plate is automatically opened under the action of internal and external water pressure difference, internal and external water pressure difference is formed, and the slag is sucked into the device, so that simple, quick and accurate cleaning of the slag can be realized;
2) The device has simple structure and small volume, is convenient to transport and carry, is very convenient to operate, does not need other external force auxiliary equipment, and can realize the whole process slag removal work by only one operator.
3) The method of the invention replaces the traditional method of replacing the whole slurry in the pile hole by adopting the limited device to clean the concentrated bottom of the slurry, and the construction of the method is irrelevant to the influence of the depth of the pile hole, thereby being simpler and more practical, saving the construction period and obviously reducing the construction cost;
4) The method adopts the technical scheme of ensuring no sediment at the bottom of the hole before grouting, saves a large amount of new slurry supplement and operation time required by secondary hole cleaning, and also saves old slurry discharged by secondary hole cleaning, thereby reducing environmental pollution and ensuring the operation environment to be more environment-friendly.
Drawings
FIG. 1 is a schematic view of the structure of an upper cavity cylinder;
FIG. 2 is a schematic view of the structure of the lower cavity cylinder;
FIG. 3 is a schematic view of a split structure of an ejector;
FIG. 4 is a schematic diagram of the overall structure of the self-ejecting hydraulic slag removing device;
FIG. 5 is an enlarged view of a partial node of the locking state of the self-locking device;
FIG. 6 is a schematic view of a closing body of the self-ejecting hydraulic slag removing device;
fig. 7 is a schematic view of an opened body of the self-elastic hydraulic slag removing device.
In the figure: the upper cavity cylinder 1, the upper cavity cylinder body 11, the upper round cover plate 12, the movable bolt connecting piece a13, the self-locking device 14, the compression spring 141, the lock rod 142, the support rod mounting hole 15 and the lower inner flanging 16; the lower cavity cylinder 2, a lower cavity cylinder entity 21, a lower round cover plate 22, a movable bolt connecting piece b23, a bolt reserved hole a24, a bolt reserved hole b25, an upper external flanging 26 and a mounting seat 27; ejector 3, upper strut 31, reserved side hole 32, lower strut 33, spring a34, spring b35.
Detailed Description
The invention is further illustrated by the following figures and examples.
The invention aims to provide a self-elastic hydraulic slag removal device for a bored pile and a construction method thereof.
As shown in fig. 1-7, the self-elastic hydraulic slag removing device for the bored pile comprises an upper cavity cylinder 1, a lower cavity cylinder 2 and an ejector 3, wherein the upper cavity cylinder 1 comprises an upper cavity cylinder body 11, the upper surface of the upper cavity cylinder body 11 is provided with an upper round cover plate 12, and the lower part of the upper cavity cylinder body is provided with a self-locking device 14 and a supporting rod mounting hole 15; the lower cavity cylinder 2 comprises a lower cavity cylinder body 21, a lower round cover plate 22 is arranged on the lower surface of the lower cavity cylinder body 21, and bolt preformed holes a24 and bolt preformed holes b25 are symmetrically arranged at the upper and lower positions of the two side surfaces of the lower cavity cylinder body 21; the catapult 3 comprises a base and a lower support rod 33 arranged on the base, wherein an upper support rod 31 is sleeved on the lower support rod 33, a reserved side hole 32 is formed in the outer side of the upper support rod 31, a spring a34 is arranged on the upper support rod 31, a spring b35 is arranged on the lower support rod 33, the upper support rod 31 sequentially penetrates through a bolt reserved hole b25, a support rod mounting hole 15 and a bolt reserved hole a24 from bottom to top to connect the upper cavity cylinder 1 with the lower cavity cylinder 2, and the upper cavity cylinder is fixedly connected with the reserved side hole 32 through a self-locking device 14.
As shown in the figure, the upper hollow cylindrical entity 11 is a hollow cylindrical entity, the upper opening of the upper hollow cylindrical entity is parallel and is in a closed shape, the bottom of the hollow cylindrical entity is turned inwards to form a lower inward flanging 16, and the gap spacing between the lower inward flanging 16 and the side wall of the cylindrical entity 11 is larger than the thickness of the upper hollow cylindrical entity; the lower cavity cylinder entity 21 is a cavity cylinder, the upper part of the cavity cylinder is turned outwards to form an upper outward flange 26, the gap between the upper outward flange 26 and the side wall of the cylinder is larger than the thickness of the lower cavity cylinder entity 21, and the lower inward flange 16 and the upper outward flange 26 are mutually buckled and matched; the corresponding position of the side wall of the upper cavity cylinder body 11 is provided with an opening, the opening is positioned at one side of the support rod mounting hole 15, the self-locking device 14 comprises a compression spring 141 and a lock rod 142, the diameter of the lock rod 142 is matched with the inner diameter of the reserved side hole 32, one end of the compression spring 141 is fixed in the opening, the other end of the compression spring 141 is connected with the lock rod 142, and when the compression spring 141 is in a normal state, the total length of the compression spring 141 and the lock rod 142 is larger than the distance between the side wall of the upper cavity cylinder body 11 and the support rod mounting hole 15; the radius of the upper opening of the upper cavity cylindrical body 11 is 0.5-0.8 times, preferably 0.67 times, the radius of the cylinder; the size of the upper round cover plate 12 is matched with the size of the upper opening, one side of the upper round cover plate 12 is provided with a cuboid connecting device protruding outwards, a round hole is reserved in the center of the side face of the cuboid, and a pin is connected with a movable bolt connecting piece a13 arranged on the upper portion of the upper cavity cylindrical entity 11.
As shown in the figure, the bottom of the lower cavity cylindrical entity 21 is provided with a mounting seat 27, the mounting seat 27 is arranged above the spring b35, an opening is arranged in the mounting seat 27, and the lower round cover plate 22 is arranged on the mounting seat 27 and matched with the opening; the bolt preformed holes b25 are symmetrically arranged at two sides of the mounting seat 27, the bolt preformed holes a24 are symmetrically arranged at two sides of the bottom surface of the upper external flange 26 of the lower cavity cylindrical entity 21, the positions of the bolt preformed holes a24, the supporting rod mounting holes 15 and the bolt preformed holes b25 are corresponding, the bolt preformed holes a24 are blind holes, the aperture is smaller than the thickness of the upper external flange 26 of the lower cavity cylindrical entity 21, and the hole depth is 20-30mm; the mounting seat 27 is a hollow disc, the ratio of the outer circle radius of the hollow disc to the radius of the lower cavity cylindrical entity 21 is 1.1-1.3:1, preferably 1.2:1, the ratio of the inner circle radius of the hollow disc to the radius of the lower cavity cylindrical entity 21 is 0.3-0.4:1, preferably 0.33:1, the inner circle size of the hollow disc is matched with the lower round cover plate 22, one side of the lower round cover plate 22 is provided with an outwards protruding rectangular connecting device, a round hole is reserved in the center of the side face of the cuboid, and the mounting seat 27 is connected through a pin.
In order to facilitate the smooth unlocking of the self-locking device 14, the outer end of the lock rod 142 is provided with a downward slope structure, the upper end of the lower support rod 33 is provided with a matched slope structure, and when the lower support rod 33 moves upwards to the outer end of the lock rod 142, the lock rod 142 can be pushed to move so as to withdraw the lock rod 142 from the reserved side hole 32, and the gradient of the lock rod is preferably 45 degrees.
In order to improve the use convenience, the two ends of the spring a34 and the spring b35 are respectively provided with the circular gaskets, the circular gaskets are matched with the springs for use, the springs encircle the corresponding supporting rods, and the radius and the number of turns of the springs meet the use requirement of ejecting the upper structure.
The upper dome plate 12 and the lower dome plate 22 of the present invention are identical in structure and are each in the shape of a round cake, and are preferably steel plates 0.8-1.5mm thick.
As shown in the figure, the construction method of the self-elastic hydraulic slag removal device for the bored pile comprises the following steps:
1) Before use, the upper cavity cylinder 1 is compressed to the bottom of the lower cavity cylinder 2, so that the self-locking device 14 is ejected to the reserved side hole 32 of the upper supporting rod 31 at the lower side of the lower cavity cylinder 2, and the whole device is in a compression locking state;
2) Erecting a triangular bracket, ensuring that the self-elastic hydraulic slag removing device is downwards placed along the center of the steel reinforcement cage, and uniformly placing the self-elastic hydraulic slag removing device to the bottom along the center by utilizing the self weight of the device;
3) When the whole device is lowered to the bottom of a pile hole, the ejector 3 is stopped from moving downwards by the rock and soil at the bottom, the upper device continues to move downwards under the action of gravity, when the slope surface at the top of the lower supporting rod 33 contacts the slope surface of the lock rod 142 of the self-locking device 14 and continues to move upwards, the lock rod 142 is ejected out of the reserved side hole 32 of the upper supporting rod 31, the self-locking device 14 is opened, the upper cavity cylinder 1 is ejected upwards under the action of the elasticity of the spring a34, and the upper cavity cylinder 1 moves upwards to be fixed when the lower inner flanging 16 and the upper outer flanging 26 are mutually buckled and matched; the volume of the cavity of the whole device is suddenly increased, water pressure difference is generated between the inside and the outside, the lower round cover plate 22 is jacked up by utilizing the principle that the external pressure is higher than the internal pressure, and the lower sediment is sucked into the upper cavity cylinder 1 and the lower cavity cylinder 2 together with water flow;
4) The pile hole is vertically lifted by the whole device manually, under the action of pressure and gravity, the upper round cover plate 12 and the lower round cover plate 22 are covered, sediment and water flow are taken out together and poured into the treatment container device, the operation is repeated after the sediment is cleaned, and the sediment is taken out completely, so that the quick sediment removal is realized.
Claims (8)
1. The self-ejection type hydraulic slag removing device for the bored pile is characterized by comprising an upper cavity cylinder (1), a lower cavity cylinder (2) and an ejector (3), wherein the upper cavity cylinder (1) comprises an upper cavity cylinder body (11), an upper round cover plate (12) is arranged on the upper surface of the upper cavity cylinder body (11), and a self-locking device (14) and a supporting rod mounting hole (15) are arranged at the lower part of the upper cavity cylinder body; the lower cavity cylinder (2) comprises a lower cavity cylinder body (21), a lower round cover plate (22) is arranged on the lower surface of the lower cavity cylinder body (21), and bolt reserved holes a (24) and bolt reserved holes b (25) are symmetrically arranged at the upper and lower positions of the two side surfaces of the lower cavity cylinder body (21); the ejector (3) comprises a base and a lower support rod (33) arranged on the base, wherein an upper support rod (31) is sleeved on the lower support rod (33), a reserved side hole (32) is formed in the outer side of the upper support rod (31), a spring a (34) is arranged on the upper support rod (31), a spring b (35) is arranged on the lower support rod (33), the upper support rod (31) sequentially penetrates through a bolt reserved hole b (25), a support rod mounting hole (15) and a bolt reserved hole a (24) from bottom to top to connect an upper cavity cylinder (1) with a lower cavity cylinder (2), and is fastened into the reserved side hole (32) by a self-locking device (14) to be connected and fixed, an upper cavity cylinder entity (11) is a cavity cylinder, an upper opening of the upper cavity cylinder is in a parallel closing shape, the bottom of the cavity cylinder is turned inwards to form a lower inner flanging (16), and the gap between the lower inner flanging (16) and the side wall of the cylinder is larger than the thickness of the upper cavity cylinder entity (11); the lower cavity cylinder entity (21) is a cavity cylinder, the upper part of the cavity cylinder is turned outwards to form an upper part turnup edge (26), the gap between the upper part turnup edge (26) and the side wall of the cylinder is larger than the thickness of the lower cavity cylinder entity (21), the lower part turnup edge (16) and the upper part turnup edge (26) are matched in a mutually annular manner, an opening is formed in the corresponding position of the side wall of the upper cavity cylinder entity (11), the opening is positioned on one side of a support rod mounting hole (15), the self-locking device (14) comprises a compression spring (141) and a lock rod (142), one end of the compression spring (141) is fixed in the opening, the other end of the compression spring (141) is connected with the lock rod (142), when the compression spring (141) is in a normal state, the total length of the compression spring (141) and the lock rod (142) is larger than the distance between the side wall of the upper cavity cylinder entity (11) and the support rod mounting hole (15), the diameter of the lock rod (142) is matched with the inner diameter of a reserved side hole (32), the upper cavity cylinder (1) is compressed to the bottom of the lower cavity cylinder (2), the self-locking device (14) is enabled to be in a reserved side hole injection state, and the self-locking device is in a reserved state.
2. The self-elastic hydraulic slag removing device for bored piles according to claim 1, wherein a mounting seat (27) is arranged at the bottom of the lower cavity cylindrical body (21), the lower cavity cylindrical body is arranged above the spring b (35) through the mounting seat (27), an opening is arranged in the mounting seat (27), and the lower round cover plate (22) is arranged on the mounting seat (27) and matched with the opening.
3. The self-elastic hydraulic slag removal device for bored piles according to claim 2, wherein bolt preformed holes b (25) are symmetrically arranged on two sides of a mounting seat (27), bolt preformed holes a (24) are symmetrically arranged on two sides of the bottom surface of an upper outer flanging (26) of a lower cavity cylindrical body (21), the positions of the bolt preformed holes a (24), a supporting rod mounting hole (15) and the bolt preformed holes b (25) correspond, the bolt preformed holes a (24) are blind holes, the aperture is smaller than the thickness of the upper outer flanging (26) of the lower cavity cylindrical body (21), and the hole depth is 20-30mm.
4. The self-elastic hydraulic slag removing device for bored piles according to claim 1, wherein the radius of the upper opening of the upper cavity cylindrical body (11) is 0.5-0.8 times of the radius of the cylinder, the size of the upper round cover plate (12) is matched with that of the upper opening, one side of the upper round cover plate (12) is provided with a cuboid connecting device protruding outwards, a round hole is reserved in the center of the side face of the cuboid, and a movable bolt connecting piece a (13) arranged on the upper portion of the upper cavity cylindrical body (11) is connected by a pin.
5. The self-elastic hydraulic slag removing device for bored piles according to claim 2, wherein the mounting seat (27) is a hollow disc, the ratio of the outer circle radius of the hollow disc to the radius of the lower cavity cylindrical entity (21) is 1.1-1.3:1, the ratio of the inner circle radius of the hollow disc to the radius of the lower cavity cylindrical entity (21) is 0.3-0.4:1, the inner circle size of the hollow disc is matched with the lower round cover plate (22), one side of the lower round cover plate (22) is provided with an outwards protruding rectangular connecting device, and a round hole is reserved in the center of the side face of the cuboid and is connected with the mounting seat (27) through a pin.
6. The self-ejecting hydraulic slag removing device for bored piles according to claim 1, wherein the outer end of the lock rod (142) is provided with a downward slope-shaped structure, the upper end of the lower support rod (33) is provided with a matched slope-shaped structure, and when the lower support rod (33) moves upwards to the outer end of the lock rod (142), the lock rod (142) can be pushed to move, and the lock rod (142) is withdrawn from the reserved side hole (32).
7. A bored pile self-ejecting hydraulic slag removing device according to any of claims 1-6, characterized in that both ends of spring a (34) and spring b (35) are respectively provided with circular gaskets.
8. A construction method of a self-elastic hydraulic slag removal device for a bored pile according to claim 1, which is characterized by comprising the following steps:
1) Before use, the upper cavity cylinder (1) is compressed to the bottom of the lower cavity cylinder (2), the self-locking device (14) is ejected to the reserved side hole (32) of the upper supporting rod (31) at the lower side of the lower cavity cylinder (2), and the whole bored pile self-ejection type hydraulic slag removing device is in a compression locking state;
2) Erecting a triangular bracket, ensuring that the self-elastic hydraulic slag removing device of the bored pile is placed down along the center of the reinforcement cage, and utilizing the self-weight of the self-elastic hydraulic slag removing device of the bored pile to be placed down to the bottom at a constant speed along the center;
3) When the whole bored pile is lowered to the bottom of a pile hole from a spring type water pressure slag removal device, the ejector (3) is stopped from moving downwards by the bottom rock and soil, the upper cavity cylinder (1) continues to move downwards due to the inertia effect of gravity, when the slope surface at the top of the lower support rod (33) contacts the slope surface of the lock rod (142) of the self-locking device (14) and continues to move upwards, the lock rod (142) is ejected out of the reserved side hole (32) of the upper support rod (31), the self-locking device (14) is opened, the upper cavity cylinder (1) is ejected upwards under the elastic effect of the spring a (34), the cavity volume of the whole bored pile is suddenly increased, water pressure difference is generated between the inside and the outside, the lower round cover plate (22) is ejected, and the lower sediment is sucked into the upper cavity cylinder (1) and the lower cavity cylinder (2) together with water flow by utilizing the principle of external pressure;
4) The bored pile is wholly and vertically lifted out of a pile hole by manual work from a bullet type hydraulic slag removal device, under the action of pressure and gravity, an upper round cover plate (12) and a lower round cover plate (22) are covered, sediment is taken out together with water flow and poured into a treatment container device, repeated operation is carried out after cleaning, and sediment is completely taken out, so that quick slag removal is realized.
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|---|---|
| CN108798566A (en) | 2018-11-13 |
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