Anchor rod static pressure steel pipe pile

Abstract

The utility model discloses an anchor rod static pressure steel pipe pile. A pile body comprises an anchor rod reaction frame, a jack and a steel pipe pile. Stirring shafts and stirring blades are arranged at the bottoms of the steel pipe piles; water wheels are arranged at the upper ends of the stirring shafts; the water pressure output equipment of the steel pipe pile comprises a high-pressure water pipe, the lower portion of the high-pressure water pipe communicates with an elbow, and the elbow is provided with a nozzle used for pushing a water wheel; the water pressure output equipment further comprises a bracket, cantilevers of the bracket correspond to the elbows, and each cantilever is arranged above the corresponding elbow in a covering mode. A convex ring for clamping the cantilever end of the cantilever to limit the lower limit of the water pressure output equipment is welded on the inner wall of the steel pipe pile; l-shaped clamping plates in one-to-one correspondence with the cantilevers are welded to the inner wall of the steel pipe pile. The anchor rod static pressure steel pipe pile is sufficient and stable in torque input, pile sinking resistance can be reduced, and the power input device is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of building foundation reinforcement construction, in particular to an anchor static pressure steel pipe pile. Background Art

[0002] Existing buildings need to be reinforced due to their age, aging foundations, or changes in the purpose of the buildings, such as exhibition halls being turned into warehouses that require heavy loads. And because the existing building floor height is limited, large equipment cannot enter its basement, so anchor static pressure steel pipe piles are often used to reinforce its foundation. The static pressure piles are mostly prefabricated concrete pipe piles, square piles and steel pipe piles. Among them, steel pipe piles are more widely used because of their high bearing capacity and easy processing. This application uses anchor static pressure steel pipe piles. The pile construction steps are roughly as follows: chiseling pile holes and anchor holes on the basement floor; implanting anchor bars into the anchor holes, fixing reaction frames on the anchor bars and installing jacks to form a pile driver; using the building's own weight as the reaction force, using jacks to statically press the steel pipe piles into the soil until the steel pipe piles reach a predetermined depth; inserting a steel cage into the hollow steel pipe pile, connecting the longitudinal reinforcement of the steel cage with the transverse reinforcement of the basement floor and pouring concrete to connect the pile to the basement floor to increase the bearing capacity of the foundation and control the settlement of the building.

[0003] However, in the actual process of pile driving, it was found that the soil under the pile body was getting more and more compacted, making the resistance to pile driving greater and greater; and due to the limited height of the basement, large equipment could not enter, so only a small anchor static pile driver could be used, and the pile driving load output by the small pile driver was limited, resulting in difficulty and slow progress in pile driving, and in extreme cases, it could not be driven down at all. Of course, some people in the industry have also proposed adding a mixing shaft at the lower end of the pile body, using the mixing blades of the shaft to first disturb and loosen the soil, release the overall stress of the soil, and thus ensure pile driving. But how to input power to the mixing shaft is a difficult problem.

[0004] The conventional idea is to add another power head above the reaction frame on the basement floor to drive the mixing shaft, but the steel pipe piles are often 40 meters deep, and the corresponding mixing shaft also needs to be 40 meters long. Too long will cause large torque transmission losses, which is not only uneconomical, but also requires a large power head to drive it. However, the large power head is large in size and difficult to carry in and out of the basement, which is not convenient; and the large power head at the top of the pile overlaps with the reaction frame pile driver and interferes with each other, making coordinated installation difficult.

[0005] Of course, some people have suggested that the power head be built into the steel pipe pile, close to the bottom of the pile, to provide torque to drive the mixing shaft nearby. However, this idea is not realistic. The diameter of the steel pipe pile generally does not exceed 600mm, and the power head inside the pile body is too small to provide sufficient torque to drive the mixing shaft. Even if there is such a small and powerful power head, its cost is bound to be high, and the above-mentioned power head is fixed in the steel pipe pile and sinks more than 40 meters underground. It is difficult to disassemble and remove it after the pile is sunk into place. In essence, it is a high-cost disposable equipment with poor economic benefits and difficult to promote and apply. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an anchor static pressure steel pipe pile which can continuously and stably transmit torque power to a stirring shaft, thereby disturbing the soil and reducing pile sinking resistance, and the power input device is easy to disassemble and assemble, can be recycled, and has sufficient power.

[0007] The technical solution of the utility model is to provide an anchor static pressure steel pipe pile, which includes an anchor reaction frame fixed to the basement floor, a jack installed on the anchor reaction frame and a steel pipe pile statically pressed into the soil by the jack; a stirring shaft is rotatably installed on the bottom diaphragm of the steel pipe pile, the lower end of the stirring shaft extends out of the steel pipe pile and is fixed with a stirring blade; the upper end of the stirring shaft extends into the lower part of the steel pipe pile cavity and a water wheel is fixed on the upper end of the stirring shaft; the anchor static pressure steel pipe pile is provided with a water pressure output device, the water pressure output device includes a high-pressure water pipe extending from the basement floor into the steel pipe pile cavity, and the lower part of the high-pressure water pipe is connected to multiple elbows, each elbow having a nozzle for driving a water wheel at the lower end; the hydraulic output device also includes a bracket, a reinforcement sleeve of the bracket is welded to the lower part of the high-pressure water pipe, the cantilever of the bracket corresponds to the elbow one by one and the inner end of each cantilever is welded to the reinforcement sleeve, and each cantilever covers the corresponding elbow; a convex ring for clamping the cantilevered end of the cantilever to limit the lower limit of the hydraulic output device is welded to the inner wall of the steel pipe pile; an L-shaped clamping plate corresponding to the cantilever one by one is welded to the inner wall of the steel pipe pile, when the nozzle sprays water to drive the water wheel, the elbow and the cantilever rotate in the opposite direction under the reaction force, so that the cantilevered end of the cantilever is automatically clamped with the corresponding L-shaped clamping plate.

[0008] Compared with the prior art, the above anchor static pressure steel pipe piles have the following advantages.

[0009] The anchor static pressure steel pipe pile solves the core problem of power input. It drives the water wheel through the jet of water to continuously and stably transmit the torque to the stirring shaft. Moreover, since the high-pressure nozzle and the water wheel are close to each other, the energy loss is small. Compared with the conventional idea of ​​setting the power head on the top of the pile, the torque power input by this application is strong and sufficient, which can fully meet the needs of stress release of disturbed and relaxed soil, avoid the situation that the soil becomes tighter as it is compressed, effectively reduce soil resistance, and ensure smooth pile sinking.

[0010] Moreover, the high-pressure water pipe extends from the side of the pile top into the steel pipe pile cavity, ensuring that the water pressure output device and the pile top reaction frame are staggered and do not affect each other, overcoming the problem of mutual interference between the large power head and the pile top reaction frame in the prior art; moreover, the installation and disassembly process of the water pressure output device are convenient and fast. During assembly, it is lowered along the steel pipe pile cavity until the bracket cantilever is against the convex ring and reaches the lower limit, and then the water column is sprayed to push the water wheel, and the elbow and the cantilever rotate forward under the reaction of the high-pressure water column, automatically clamping the cantilever end of the cantilever with the corresponding L-shaped card plate, that is, the assembly is completed. During the pile delivery process, the water pressure output device automatically sinks synchronously with the pile body and continuously drives the stirring shaft; and during disassembly, it is only necessary to rotate the bracket in the opposite direction to make the cantilever detach from the L-shaped card plate and then raise the high-pressure water pipe, which is quick and convenient to operate. The bracket swing arm not only serves as a disassembly and assembly component connected to the steel pipe pile, but also covers the corresponding elbow pipe to provide support protection for it, further improving the firmness and integrity of the water pressure output device.

[0011] Precisely because of its convenient assembly and disassembly, it can be recycled repeatedly. After the first pile is sunk, it can be quickly dismantled and moved to the next pile to continue providing power, which fundamentally solves the problem that the small power head assembled in the pile body in the prior art is difficult to dismantle and is forced to remain in the previous pile body, resulting in cost waste. In other words, the more complex and expensive water pressure output equipment such as the elbow nozzle is removed from the bottom of the pile for recycling, while the steel water wheel, agitator shaft, etc. are low in cost, generally a hundred yuan, so they are left at the bottom of the pile, and the cost is completely acceptable. From an economic point of view, this application has a high value and prospect for promotion and application.

[0012] Preferably, a rubber roller is rotatably mounted on the cantilevered end of the cantilever; thus, a buffer is effectively provided to avoid direct rigid contact between the cantilevered end and the convex ring or the L-shaped clamping plate, thereby extending the service life of the bracket of the water pressure output device.

[0013] As a further preference, the agitator shaft is connected to the steel pipe pile diaphragm via a sealed bearing, and the water sprayed from each nozzle is contained in the steel pipe pile cavity; the anchor static pressure steel pipe pile also includes a water tank, a return pipe connecting the water tank and the steel pipe pile cavity, and a return pump arranged on the return pipe; the inlet of the high-pressure water pipe is also connected to the water tank, and the water delivery pump is arranged on the high-pressure water pipe; firstly, the sealed bearing blocks the lower opening of the steel pipe pile cavity to prevent the sprayed water from infiltrating into the soil in large quantities and destroying the mechanical properties of the soil and reducing the bearing capacity of the pile end; the water is blocked by the sealed bearing and stored in the steel pipe pile cavity, and in order to avoid overflowing from the cavity, the return pump is used to pump excess water into the water tank, thereby ensuring that the construction site is clean and orderly; furthermore, the surplus water in the first pile will not be idle and wasted after being pumped into the water tank, but can be recycled to supply the water wheel that drives other steel pipe piles on the construction site, which is efficient, energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1The utility model is a structural schematic diagram of an anchor static pressure steel pipe pile.

[0015] Figure 2 The utility model is a structural schematic diagram of a half-sectioned anchor static pressure steel pipe pile.

[0016] Figure 3 The utility model is a structural schematic diagram of a water pressure output device for an anchor static pressure steel pipe pile.

[0017] As shown in the figure, 1. steel pipe pile, 2. diaphragm, 3. stirring shaft, 4. sealed bearing, 5. stirring blade, 6. water wheel, 7. high-pressure water pipe, 8. elbow, 9. nozzle, 10. reinforcement sleeve, 11. cantilever, 12. convex ring, 13. L-shaped pallet, 14, rubber roller. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 3 As shown, the utility model anchor static pressure steel pipe pile comprises an anchor reaction frame fixed to the basement floor foundation, a through-hole jack installed on the anchor reaction frame and a steel pipe pile 1 statically pressed into the soil by the jack.

[0020] The bottom of the steel pipe pile 1 is provided with two upper and lower diaphragms 2, and the center hole of each diaphragm 2 is rotatably mounted with the same stirring shaft 3 via a sealed bearing 4, and the sealed bearing 4 can be a commercially available waterproof sealed bearing. The lower end of the stirring shaft 3 extends out of the steel pipe pile 1 and is fixed with a plurality of stirring blades 5, such as three; the upper end of the stirring shaft 3 extends into the lower part of the tube cavity of the steel pipe pile 1 and is fixed with a water wheel 6.

[0021] The anchor static pressure steel pipe pile is provided with an independent hydraulic output device, which includes a high-pressure water pipe 7 extending from the basement floor into the lower part of the steel pipe pile 1, and the lower part of the high-pressure water pipe 7 is connected to a plurality of elbows 8, such as four elbows, and the lower end of each elbow 8 is provided with a nozzle 9 for driving the water wheel 6. The hydraulic output device also includes a steel bracket, and the reinforcement sleeve 10 of the bracket is welded to the lower part of the high-pressure water pipe 7. The cantilever 11 of the bracket corresponds to the elbow 8 one by one, and the inner end of each cantilever 11 is welded to the reinforcement sleeve 10, each cantilever 11 covers the corresponding elbow 8, and each swing arm and the corresponding elbow 8 can be tied firmly by wire.

[0022] A convex ring 12 is welded to the lower area of ​​the inner wall of the steel pipe pile 1 for clamping the cantilevered end of the cantilever 11 to limit the lower limit of the water pressure output device; an L-shaped clamping plate 13 corresponding to the cantilever 11 is welded to the inner wall of the steel pipe pile 1. When the nozzle 9 sprays water to push the water wheel 6, the elbow 8 and the cantilever 11 rotate in the opposite direction under the reaction force, so that the cantilevered end of the cantilever 11 is automatically clamped with the corresponding L-shaped clamping plate 13; thereby assembling the water pressure output device into the pipe cavity of the steel pipe pile 1.

[0023] A radially inwardly concave annular groove is provided at the cantilevered end of each cantilever 11, and a rubber roller 14 is rotatably mounted in the annular groove.

[0024] The water sprayed from each nozzle 9 is blocked by the sealed bearing 4 and will not penetrate into the soil at the bottom of the pile to a large extent, but will be contained in the tube cavity of the steel pipe pile 1. The anchor static pressure steel pipe pile also includes a water tank located on the ground, a return pipe connecting the water tank and the tube cavity of the steel pipe pile 1, and a return pump arranged in the return pipe; the high-pressure water pipe 7 extends vertically in the tube cavity of the steel pipe pile 1 and passes through the through-hole jack at the top of the pile. The inlet of the high-pressure water pipe 7 is also connected to the water tank, while the outlet of the high-pressure water pipe 7 is located in the tube cavity of the steel pipe pile 1 and is connected to each elbow 8 pipe. The water delivery pump is arranged on the high-pressure water pipe 7. By pressurizing the water delivery pump, the water pressure of the nozzle 9 is roughly 2 to 10 mPa greater than the water pressure at the bottom of the pile, which can ensure that the water pressure of the nozzle 9 is sufficient to drive the stirring shaft 3 to disturb the soil.

[0025] The construction steps of the anchor static pressure steel pipe pile are as follows. A pile driving hole and an anchor hole are bored in the basement floor; anchor rods are implanted in the anchor holes, a reaction frame is fixed on the anchor rods, and a jack is installed to form a pile driver; a hydraulic output device is placed in the tube cavity of the steel pipe pile 1 and the bracket arm is placed on the convex ring 12, and a high-pressure water pipe 7 of the hydraulic output device is passed through the through-hole jack and connected to the water tank on the ground; the steel pipe pile 1 is statically pressed into the soil by the jack using the dead weight of the building as the reaction force, and the water delivery pump is synchronously started to spray a high-pressure water column through the water wheel 6 to drive the stirring shaft 3 to loosen the soil at the bottom of the pile, and the bracket rotates in the reverse direction under the reaction force of the high-pressure water flow, and automatically engages with the L-shaped clamping plate 13 on the inner wall of the steel pipe pile 1, and continues to press the steel pipe pile 1 down until it reaches a predetermined depth; then it rotates forward and raises the pressure water pipe 7, removes the hydraulic output device from the steel pipe pile 1, and then inserts a steel cage into the hollow steel pipe pile 1, and connects the longitudinal reinforcement of the steel cage with the transverse reinforcement of the basement floor and pours concrete, so that the pile is connected to the basement floor.

Claims

1. An anchor static pressure steel pipe pile, which comprises an anchor reaction frame fixed to the basement floor, a jack installed on the anchor reaction frame and a steel pipe pile statically pressed into the soil by the jack; characterized in that: The bottom diaphragm of the steel pipe pile is rotatably mounted with a stirring shaft, the lower end of the stirring shaft extends out of the steel pipe pile and is fixed with a stirring blade; the upper end of the stirring shaft extends into the lower part of the steel pipe pile cavity and a water wheel is fixed to the upper end of the stirring shaft; the anchor static pressure steel pipe pile is provided with a water pressure output device, the water pressure output device includes a high-pressure water pipe extending from the basement floor into the steel pipe pile cavity, the lower part of the high-pressure water pipe is connected to a plurality of elbows, and the lower end of each elbow is provided with a nozzle for driving the water wheel; the water pressure output device also includes a bracket, the bracket The reinforcement sleeve of the frame is welded to the lower part of the high-pressure water pipe, the cantilever of the bracket corresponds to the elbow one by one and the inner end of each cantilever is welded to the reinforcement sleeve, and each cantilever covers the corresponding elbow; the inner wall of the steel pipe pile is welded with a convex ring used to clamp the cantilevered end of the cantilever to limit the lower limit of the water pressure output device; the inner wall of the steel pipe pile is welded with an L-shaped clamping plate corresponding to the cantilever one by one, when the nozzle sprays water to push the water wheel, the elbow and the cantilever rotate in the opposite direction under the reaction force, so that the cantilevered end of the cantilever is automatically clamped with the corresponding L-shaped clamping plate.

2. The anchor static pressure steel pipe pile according to claim 1, characterized in that: The cantilevered end of the cantilever is rotatably equipped with a rubber roller.

3. The anchor static pressure steel pipe pile according to claim 1, characterized in that: The stirring shaft is connected to the steel pipe pile diaphragm via a sealed bearing, and the water sprayed from each nozzle is contained in the steel pipe pile cavity; the anchor static pressure steel pipe pile also includes a water storage tank, a return pipe connecting the water storage tank and the steel pipe pile cavity, and a return pump arranged on the return pipe; the high-pressure water pipe inlet is also connected to the water storage tank, and the water delivery pump is arranged on the high-pressure water pipe.

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