Foundation pit support prefabricated row pile with built-in bottom drainage mechanism

Abstract

This invention relates to the field of foundation construction technology, specifically to a precast pile bank for foundation pit support with a bottom-built drainage mechanism. The pile includes a concrete-cast pile, which is cast between an outer steel cylinder and an inner steel cylinder. The bottom ends of the outer and inner steel cylinders are fixed to the surface of a steel base plate. The advantages are: the precast pile bank with a bottom-built drainage mechanism proposed in this invention forms the concrete-cast pile between the outer and inner steel cylinders, making the concrete pile less susceptible to damage. Furthermore, the reinforcing cage composed of steel hoops and vertical steel bars is not exposed, ensuring the strength of the pile bank. Additionally, a mobile, climbable seat is installed on the surface of the anti-bending frame to carry the water pump. This allows the water pump to be placed at different heights on the anti-bending frame as needed. When unclogging the pumping pipe is required, the mobile seat can be raised to the bottom of the outer steel cylinder, lifting the pumping pipe to the top of the foundation pit, reducing the workload of workers pulling the pumping pipe.

Description

Technical Field

[0001] This invention relates to the field of foundation construction technology, specifically to a precast pile foundation for foundation pit support with a built-in drainage mechanism at the bottom. Background Technology

[0002] Foundation pit support refers to the measures taken to support, reinforce, and protect the side walls and surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. Pile support, as a conventional method of foundation pit support, involves laying piles at the edge of the foundation pit.

[0003] In the existing technology, piles are made of concrete-cast steel reinforcement frames, which are usually prefabricated in the factory and then transferred to the foundation pit for construction. During the transportation process, the piles are sometimes damaged by bumps at the ends. Although this does not affect the construction and use, when the concrete of the pile is damaged to the point that the internal steel reinforcement structure is exposed, the exposed steel reinforcement is easily corroded by rainwater.

[0004] Furthermore, when rainy weather occurs during foundation pit construction, the water inside the foundation pit needs to be pumped out quickly. Usually, water pumps are placed on the building foundation surface at the edge of the foundation pit, and water pipes are extended into the foundation pit. During the drainage process, when the water pipes become blocked, workers need to walk back and forth between the foundation pit and the top of the foundation pit to clear the blockage, or pull a large number of water pipes that have been extended into the foundation pit to the top of the foundation pit to clear the blockage, which involves a lot of labor. Summary of the Invention

[0005] The purpose of this invention is to provide a precast pile foundation for foundation pit support with a bottom-built drainage mechanism, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a precast pile for foundation pit support with a bottom-built drainage mechanism, comprising concrete-cast piles, wherein the concrete-cast piles are cast between an outer steel cylinder and an inner steel cylinder, the bottom ends of the outer steel cylinder and the inner steel cylinder are fixed to the surface of a steel base plate, multiple anti-bending frames are integrally formed on the surface of the outer steel cylinder, a steel reinforcement hoop is fixed on the inner ring surface of the anti-bending frame, and vertical steel bars are provided between the steel reinforcement hoop and the outer steel cylinder, a movable seat is slidably connected inside one anti-bending frame, an installation port is opened on the surface of the movable seat, a limit baffle is inserted into the surface of the installation port, one end of the limit baffle extends into a guide rail groove, the guide rail groove is opened on the side plate of the anti-bending frame, an electric telescopic rod is installed on the surface of the movable seat, a brake disc is fixed on the piston rod of the electric telescopic rod, the brake disc faces the anti-bending frame, a water pump is installed on the surface of the movable seat, a water pump is connected to the suction end of the water pump with a water pump pipe, a water pump is connected to the discharge end of the water pump with a drain pipe, and both ends of the movable seat are rotatably connected to traveling wheels.

[0007] Preferably, the folding resistance frame is in a "C"-shaped plate structure. Multiple folding resistance frames are arranged and distributed along the inner ring surface of the outer steel cylinder, and the folding resistance frame protrudes towards the inner ring opening of the outer steel cylinder. Multiple supporting grooves are formed on the inner ring surface of the folding resistance frame. The multiple supporting grooves are arranged vertically at equal distances and of equal size along the long side of the folding resistance frame. The steel bar hoop is simultaneously lapped on the bottom surfaces of the multiple supporting grooves. A limiting block is fixed on the inner ring surface of the outer steel cylinder. The limiting block is in a "U"-shaped block. There are multiple groups of limiting blocks. The limiting block is located between two adjacent supporting grooves. The vertical steel bar penetrates through the groove body of the limiting block and then clings to the outer ring surface of the steel bar hoop.

[0008] Preferably, the steel bottom plate is in a circular ring plate structure. The inner ring diameter of the steel bottom plate is equal to the inner ring pipe diameter of the inner steel cylinder. Multiple notch grooves are formed on the outer ring surface of the steel bottom plate. The notch grooves correspond to the folding resistance frames one by one. The outer steel cylinder, the folding resistance frame, the inner steel cylinder, the vertical steel bar, and the concrete pouring pile have the same height.

[0009] Preferably, the guide rail groove is a square groove. There are two groups of guide rail grooves, which are respectively distributed on two parallel side plates of the folding resistance frame. The height of the guide rail groove is equal to the height of the folding resistance frame. The moving seat is in a "convex"-shaped plate structure. A recessed groove one is formed on one side of the moving seat. A recessed groove two is formed on the other side of the moving seat. The water pump is fixed in the recessed groove one by bolts. An installation groove is formed on the surface of the recessed groove one. A storage groove is formed on the surface of the installation groove. The electric telescopic rod is installed in the storage groove. The brake disc is located in the recessed groove two.

[0010] Preferably, an embedding groove is formed on one side of the brake disc away from the electric telescopic rod. The embedding groove is a "cross"-shaped groove. A rubber gasket is fixed on the surface of the embedding groove. The rubber gasket is in a "cross"-shaped plate structure. The thickness of the rubber gasket is greater than the depth of the embedding groove. Two screw rods are screwed on the surface of the installation groove. The two screw rods are symmetrically distributed with respect to the storage groove. A pressing plate is fixed at one end of the screw rod. A rubber clamping strip is fixed on the surface of the pressing plate facing the storage groove. The rubber clamping strip clamps between the electric telescopic rod and the pressing plate. Two picking grooves are formed on the surface of the rubber clamping strip away from the storage groove.

[0011] Preferably, there are two installation openings, which are symmetrically distributed with respect to the moving seat. A through hole one is formed on the side wall of the installation opening. The limiting baffle is movably inserted into the through hole one. One end of the limiting baffle extending into the inner side of the guide rail groove has an inclined surface, and the inclined surface faces the folding resistance frame. A traction plate is fixed at the other end of the limiting baffle. Multiple rubber clamping blocks are fixed between the traction plate and the installation opening. A handle is fixed on the surface of the moving seat, and the handle corresponds to the traction plate one by one.

[0012] Preferably, two through holes II are formed on the surface of the traction plate. The two through holes II are symmetrically distributed with respect to the rubber clamping block. A扶正板 (扶正板) is movably inserted into the through hole II. The扶正板 (扶正板) is fixed between the two side walls of the installation port. A round hole is formed on the surface of the rubber clamping block, and a reserved groove is formed inside the rubber clamping block. Elastic support pieces are fixed on the surface of the reserved groove. The elastic support pieces are in the shape of "Ω" strips. There are two elastic support pieces, which are symmetrically distributed with respect to the round hole.

[0013] Preferably, two tube holding handles are fixed on the surface of the moving seat. The tube holding handles are in the shape of "T" - shaped cylinders and are used for winding up the idle water suction pipe and drainage pipe.

[0014] Preferably, side grooves I are formed at both ends of the moving seat. The traveling wheels are inside the side grooves I. One end of the shaft of the traveling wheel is rotatably connected in the wheel shaft groove, and the wheel shaft groove is formed on the side wall of the side groove I. The other end of the shaft of the traveling wheel is fixed on the drive shaft of the servo motor. The servo motor is installed in the side groove II. The side groove II is formed on the surface of the side groove I. The side groove II and the wheel shaft groove are symmetrically distributed with respect to the side groove I. The top surface and the bottom surface of the side groove II are both fixed with stop bars. The servo motor is between the stop bars and the side groove II. And a buckle plate is buckled at the end of the moving seat. The buckle plate is in the shape of a "匚" - shaped plate structure and is fixed on the moving seat by screws.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] For the precast row piles for foundation pit support with a built - in bottom drainage and dewatering mechanism proposed by the present invention, the concrete cast - in - place pile is formed by pouring concrete between the outer steel cylinder and the inner steel cylinder. In this way, the concrete cast - in - place pile is not easily damaged, and there is no hidden danger of exposure for the steel reinforcement cage composed of steel reinforcement hoops and vertical steel bars, ensuring the use strength of the row piles. And a climbable moving seat is installed on the surface of the anti - folding frame to carry the water pump. Not only can the water pump be placed at different height positions on the anti - folding frame as needed, but when it is necessary to dredge the blockage problem of the water suction pipe, the moving seat can climb to the bottom of the outer steel cylinder and pull the water suction pipe to the top of the foundation pit, reducing the labor intensity of the staff in pulling the water suction pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is Figure 1 a schematic enlarged view of the structure at A in

[0019] Figure 3 is a schematic structural diagram of the connection between the outer steel cylinder and the inner steel cylinder of the present invention;

[0020] Figure 4 is a schematic semi - sectional view of the connection between the outer steel cylinder and the inner steel cylinder of the present invention;

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B;

[0022] Figure 6 This is a schematic diagram of the outer steel cylinder structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the connection structure between the steel reinforcement hoop and the vertical steel reinforcement of the present invention;

[0024] Figure 8 This is a schematic diagram of the connection structure between the steel base plate and the inner steel cylinder of the present invention;

[0025] Figure 9 This is a schematic diagram of the bottom partial structure of the present invention after being cut open;

[0026] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C;

[0027] Figure 11 This is a schematic diagram of the movable seat structure of the present invention;

[0028] Figure 12 This is a schematic diagram of the back structure of the movable seat of the present invention;

[0029] Figure 13 This is a schematic diagram of the wheel mounting structure of the present invention;

[0030] Figure 14 This is a partial cross-sectional view of the movable seat of the present invention.

[0031] Figure 15 for Figure 14 Enlarged schematic diagram of the structure at point D;

[0032] Figure 16 This is a schematic diagram of the connection structure between the limiting baffle and the traction plate of the present invention;

[0033] Figure 17 This is a schematic diagram of the rubber clamping block structure of the present invention;

[0034] Figure 18 This is a schematic diagram of the half-section structure of the rubber clamping block of the present invention;

[0035] Figure 19 This is a schematic diagram of the connection structure between the screw and the pressure plate of the present invention;

[0036] Figure 20 This is a schematic diagram of the side groove structure of the present invention;

[0037] Figure 21 This is a schematic diagram of the pressure plate structure of the present invention.

[0038] In the diagram: 1. Outer steel cylinder; 2. Anti-bending frame; 3. Steel base plate; 4. Inner steel cylinder; 5. Support groove; 6. Rebar hoop; 7. Limiting block; 8. Vertical reinforcing bar; 9. Notched groove; 10. Concrete pile; 11. Guide rail groove; 12. Moving seat; 13. Installation port; 14. Through-hole one; 15. Limiting baffle; 16. Traction plate; 17. Handle; 18. Through-hole two; 19. Straightening plate; 20. Rubber clamp; 21. Reserved groove; 22. Elastic support plate; 23. Installation groove; 24. Storage groove; 25. Electric telescopic rod; 26. Brake disc; 27. Embedding groove; 28. Rubber gasket; 29. ​​Screw; 30. Pressure plate; 31. Rubber clamp strip; 32. Picking groove; 33. Water pump; 34. Water suction pipe; 35. Drainage pipe; 36. Bundled pipe handle; 37. Side groove one; 38. Walking wheel; 39. Wheel axle groove; 40. Side groove two; 41. Servo motor; 42. Stop bar; 43. Buckle plate. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1

[0041] Please see Figures 1 to 8, the present invention provides a technical solution: a precast row pile for foundation pit support with a built-in drainage mechanism at the bottom, including a concrete pouring pile 10, the concrete pouring pile 10 is poured between an outer steel cylinder 1 and an inner steel cylinder 4, the bottom ends of the outer steel cylinder 1 and the inner steel cylinder 4 are fixed on the surface of a steel bottom plate 3, a plurality of anti-fold frames 2 are integrally formed on the surface of the outer steel cylinder 1, a steel bar hoop 6 is fixed on the inner ring surface of the anti-fold frame 2, vertical steel bars 8 are provided between the steel bar hoop 6 and the outer steel cylinder 1, a movable seat 12 is slidably connected inside one anti-fold frame 2, an installation opening 13 is formed on the surface of the movable seat 12, a limiting baffle 15 is inserted on the surface of the installation opening 13, one end of the limiting baffle 15 extends into a guide rail groove 11, the guide rail groove 11 is formed on the side plate of the anti-fold frame 2, an electric telescopic rod 25 is installed on the surface of the movable seat 12, a brake disc 26 is fixed on the piston rod of the electric telescopic rod 25, the brake disc 26 faces the anti-fold frame 2, a water pump 33 is installed on the surface of the movable seat 12, a suction pipe 34 is connected to the suction end of the water pump 33, a drain pipe 35 is connected to the discharge end of the water pump 33, and walking wheels 38 are rotatably connected to both ends of the movable seat 12; the concrete pouring pile 10 is poured and formed between the outer steel cylinder 1 and the inner steel cylinder 4, so that the concrete pouring pile 10 is not easily damaged, and there is no hidden danger of exposure for the steel bar cage formed by the steel bar hoop 6 and the vertical steel bars 8, ensuring the use strength of the row pile; and a climbable movable seat 12 is installed on the surface of the anti-fold frame 2 to carry the water pump 33, which not only realizes placing the water pump 33 at different height positions on the anti-fold frame 2 according to needs, but also when it is necessary to dredge the blockage problem of the suction pipe 34, the movable seat 12 is climbed to the bottom of the outer steel cylinder 1, and the suction pipe 34 is pulled to the top of the foundation pit, reducing the labor intensity of the staff in pulling the suction pipe 34.

[0042] Embodiment 2

[0043] On the basis of Embodiment 1, in order to realize the enclosure of the pouring space of the concrete pouring pile 10 and the protection of the concrete pouring pile 10 after pouring and forming, the anti-fold frame 2 is in a "C"-shaped plate structure, a plurality of anti-fold frames 2 are arranged and distributed along the inner ring surface of the outer steel cylinder 1, and the anti-fold frame 2 protrudes towards the inner side of the inner ring opening of the outer steel cylinder 1. A plurality of supporting grooves 5 are formed on the inner ring surface of the anti-fold frame 2, and the plurality of supporting grooves 5 are arranged vertically at equal distances and equal sizes along the long side of the anti-fold frame 2. The steel bar hoop 6 is simultaneously lapped on the bottom surfaces of the plurality of supporting grooves 5. A limiting block 7 is fixed on the inner ring surface of the outer steel cylinder 1. The limiting block 7 is in a "U"-shaped block, and there are multiple groups of the limiting block 7. The limiting block 7 is located between two adjacent supporting grooves 5. The vertical steel bars 8 pass through the groove body of the limiting block 7 and then closely adhere to the outer ring surface of the steel bar hoop 6; the steel bottom plate 3 is in a circular ring plate structure, the inner ring diameter of the steel bottom plate 3 is equal to the inner ring pipe diameter of the inner steel cylinder 4, a plurality of notch grooves 9 are formed on the outer ring surface of the steel bottom plate 3, and the notch grooves 9 correspond to the anti-fold frames 2 one by one. The heights of the outer steel cylinder 1, the anti-fold frame 2, the inner steel cylinder 4, the vertical steel bars 8 and the concrete pouring pile 10 are equal.

[0044] When prefabricating the cast-in-place concrete pile 10, first weld the limit block 7 to the inner ring surface of the outer steel cylinder 1, and then place multiple steel bar hoop rings 6 one by one in the corresponding supporting grooves 5. Since the steel bar hoop rings 6 are formed by bending steel bars, there are gaps at both ends of the steel bar hoop rings 6, which facilitates squeezing the steel bar hoop rings 6 to cause slight deformation, so as to ensure that the steel bar hoop rings 6 can be pushed into the supporting grooves 5. Then weld both the outer steel cylinder 1 and the inner steel cylinder 4 to the steel base plate 3. Next, pass the vertical steel bars 8 through the corresponding multiple limit blocks 7 in sequence, and then erect the outer steel cylinder 1 and the inner steel cylinder 4. At this time, pour concrete between the outer steel cylinder 1 and the inner steel cylinder 4. After the concrete wraps the steel bar hoop rings 6 and the limit blocks 7, it forms the cast-in-place concrete pile 10. The outer ring surface of the formed cast-in-place concrete pile 10 is protected by the outer steel cylinder 1, and the inner ring surface of the formed cast-in-place concrete pile 10 is protected by the inner steel cylinder 4, avoiding the problem of concrete bumping and damage during the turnover of the cast-in-place concrete pile 10. Moreover, after the cast-in-place concrete pile 10 is wrapped by the outer steel cylinder 1 and the steel base plate 3, the service strength of the row piles is improved; and multiple folding-resistant frames 2 are integrally formed on the cylinder body of the outer steel cylinder 1, enhancing the folding-resistant strength of the outer steel cylinder 1.

[0045] Embodiment III

[0046] Refer to the attached Figures 9 to 14 and Figure 21 As shown, on the basis of Embodiment II, in order to brake the moving seat 12 in the folding-resistant frame 2, the guide rail groove 11 is a square groove, and there are two groups of guide rail grooves 11, which are respectively distributed on two parallel side plates of the folding-resistant frame 2. The height of the guide rail groove 11 is equal to the height of the folding-resistant frame 2. The moving seat 12 is in a "convex"-shaped plate structure. A recessed groove one is opened on one side of the moving seat 12, and a recessed groove two is opened on the other side of the moving seat 12. The water pump 33 is fixed in the recessed groove one by bolts. An installation groove 23 is opened on the surface of the recessed groove one, and a storage groove 24 is opened on the surface of the installation groove 23. The electric telescopic rod 25 is installed in the storage groove 24, and the brake disc 26 is in the recessed groove two; a fitting groove 27 is opened on one side of the brake disc 26 away from the electric telescopic rod 25. The fitting groove 27 is a "cross"-shaped groove, and a rubber gasket 28 is fixed on the surface of the fitting groove 27. The rubber gasket 28 is in a "cross"-shaped plate structure, and the thickness of the rubber gasket 28 is greater than the depth of the fitting groove 27. Two screw rods 29 are screwed on the surface of the installation groove 23, and the two screw rods 29 are symmetrically distributed with respect to the storage groove 24. One end of the screw rod 29 is fixed with a pressing plate 30, and a rubber clamping strip 31 is fixed on the surface of the pressing plate 30 facing the storage groove 24. The rubber clamping strip 31 is clamped between the electric telescopic rod 25 and the pressing plate 30, and two picking grooves 32 are opened on the surface of the rubber clamping strip 31 facing away from the storage groove 24.

[0047] After the movable seat 12 is pushed into the anti-bending frame 2, the limiting baffle 15 extends into the guide rail groove 11, thus preventing the movable seat 12 from moving away from the anti-bending frame 2. At this time, the traveling wheel 38 is in close contact with the surface of the anti-bending frame 2. To prevent the movable seat 12 from sliding down at will, when the movable seat 12 needs to be braked, the switch of the electric telescopic rod 25 is triggered. After the electric telescopic rod 25 is started, the piston rod of the electric telescopic rod 25 extends and pushes the brake disc 26 to press against one side of the anti-bending frame 2. At this time, the mounting groove 27 is deformed by pressure, which plays an anti-slip role. The brake disc 26 continuously applies force to the anti-bending frame 2 to prevent the movable seat 12 from falling off. When it is necessary to repair or replace the electric telescopic rod 25, first loosen the bolts on the surface of the water pump 33, remove the water pump 33 from the recessed groove of the movable seat 12, and then turn the pressure plate 30 to drive the screw 29 to rotate. During the loosening of screw 29, pressure plate 30 and electric telescopic rod 25 are misaligned. At this time, electric telescopic rod 25 is no longer clamped by pressure plate 30. After loosening and removing the connecting screw between brake disc 26 and piston rod of electric telescopic rod 25, electric telescopic rod 25 can be pulled out from mounting slot 23. Replace electric telescopic rod 25 is pushed into storage slot 24. Brake disc 26 and piston rod of electric telescopic rod 25 are fixed together with connecting screw. Then, pressure plate 30 is moved to lock screw 29. At this time, pressure plate 30 clamps electric telescopic rod 25 to prevent electric telescopic rod 25 from bumping in storage slot 24. Rubber clip 31 is clamped between pressure plate 30 and electric telescopic rod 25 and deforms. The elasticity of rubber clip 31 supports pressure plate 30 and drives screw 29 to engage tightly with screw hole.

[0048] Example 4

[0049] See attached document Figures 16 to 18 Based on Embodiment 3, in order to enable quick loading and unloading of the movable seat 12 on the anti-bending frame 2, two mounting ports 13 are provided, symmetrically distributed about the movable seat 12. A through-hole 14 is provided on the side wall of each mounting port 13, and a limiting baffle 15 is movably inserted into the through-hole 14. One end of the limiting baffle 15 extending into the guide rail groove 11 has an inclined surface facing the anti-bending frame 2. A traction plate 16 is fixed to the other end of the limiting baffle 15. Multiple rubber clamps 20 are fixed between the traction plate 16 and the mounting port 13, and a handle 17 is fixed to the surface of the movable seat 12. 7 corresponds one-to-one with the traction plate 16; the surface of the traction plate 16 is provided with a second through hole 18, and there are two sets of second through holes 18. The two sets of second through holes 18 are symmetrically distributed about the rubber clamp 20. A straightening plate 19 is movably inserted into the inside of the second through hole 18. The straightening plate 19 is fixed between the two side walls of the mounting port 13. The surface of the rubber clamp 20 is provided with a round opening, and the inside of the rubber clamp 20 is provided with a reserved groove 21. An elastic support plate 22 is fixed on the surface of the reserved groove 21. The elastic support plate 22 is in the shape of an "Ω" strip. There are two elastic support plates 22, and the two elastic support plates 22 are symmetrically distributed about the round opening.

[0050] After the limit baffle 15 extends into the guide rail groove 11, the rubber clamping block 20 elastically supports between the traction plate 16 and the mounting port 13, preventing the limit baffle 15 from disengaging from the guide rail groove 11 without external force pulling. When it is necessary to detach the moving seat 12 from the folding frame 2, the middle fingers of both hands respectively toggle the traction plate 16 to squeeze the corresponding rubber clamping block 20. After the rubber clamping block 20 is compressed and deformed, the traction plate 16 slides along the扶正板 19, and the limit baffle 15 moves synchronously with the traction plate 16 until the limit baffle 15 is withdrawn from the guide rail groove 11. At this time, the thumbs and index fingers of both hands hold the handle 17, and pulling the handle 17 can drive the moving seat 12 to be detached from the folding frame 2. The reason for installing the扶正板 19 is to ensure that the traction plate 16 slides along a straight line when toggled, and after the扶正板 19 penetrates the traction plate 16, they jointly bear the pressure of the limit baffle 15 being squeezed against the surface of the guide rail groove 11, thereby reducing the problem of the limit baffle 15 being squeezed and deformed.

[0051] Embodiment Five

[0052] On the basis of Embodiment Four, in order to enable the moving seat 12 to travel along the folding frame 2, two bundle tube handles 36 are fixed on the surface of the moving seat 12. The bundle tube handles 36 are "T"-shaped cylinders and are used to wind up the idle water suction pipe 34 and drain pipe 35. Both ends of the moving seat 12 are provided with side grooves one 37. The traveling wheels 38 are inside the side grooves one 37. One end shaft body of the traveling wheel 38 is rotatably connected in the wheel shaft groove 39, and the wheel shaft groove 39 is opened on the side wall of the side groove one 37. The other end shaft body of the traveling wheel 38 is fixed on the driving shaft of the servo motor 41. The servo motor 41 is installed in the side groove two 40. The side groove two 40 is opened on the surface of the side groove one 37. The side groove two 40 and the wheel shaft groove 39 are symmetrically distributed about the side groove one 37. The top surface and the bottom surface of the side groove two 40 are both fixed with a retaining strip 42. The servo motor 41 is between the retaining strip 42 and the side groove two 40, and a buckle plate 43 is buckled on the end of the moving seat 12. The buckle plate 43 is a "C"-shaped plate structure and is fixed on the moving seat 12 by screws.

[0053] When it is necessary to control the movement of the moving seat 12 along the folding frame 2, trigger the switch of the electric telescopic rod 25. While the electric telescopic rod 25 starts and the piston rod retracts, the brake disc 26 no longer clamps the folding frame 2. At this time, the moving seat 12 lacks braking. At this time, the switch of the servo motor 41 is triggered simultaneously with the electric telescopic rod 25. The servo motor 41 drives the traveling wheel 38 to rotate. The servo motor 41 is programmed with two modes of forward rotation and reverse rotation, so as to facilitate controlling the lifting of the moving seat 12 along the folding frame 2. When the switch of the servo motor 41 is turned off, the switch of the electric telescopic rod 25 is triggered. The piston rod of the electric telescopic rod 25 extends to squeeze the brake disc 26 to clamp the folding frame 2, realizing braking of the moving seat 12. After triggering the switch of the water pump 33, the water pump 33 sucks the accumulated water inside the foundation pit through the water suction pipe 3, and discharges it through the drain pipe 35.

[0054] In actual use, when casting the precast concrete pile 10, firstly, the limiting block 7 is welded to the inner ring surface of the outer steel cylinder 1. Then, multiple steel reinforcement hoops 6 are placed one by one in the corresponding support grooves 5. Since the steel reinforcement hoops 6 are formed by bending steel bars, there are notches at both ends of the steel reinforcement hoops 6, which facilitates the compression of the steel reinforcement hoops 6 to cause slight deformation, thereby ensuring that the steel reinforcement hoops 6 can be pushed into the support grooves 5. Then, the outer steel cylinder 1 and the inner steel cylinder 4 are both welded to the steel base plate 3. Next, the vertical steel bars 8 are passed through the corresponding multiple limiting blocks 7 in sequence, and then the outer steel cylinder 1 and the inner steel cylinder 4 are erected. At this time, concrete is poured between the outer steel cylinder 1 and the inner steel cylinder 4. The concrete encapsulates the steel reinforcement hoops 6 and the limiting block 7 to form a pile. The concrete pile 10 is a cast-in-place concrete pile. The outer ring of the cast-in-place concrete pile 10 is protected by an outer steel cylinder 1, and the inner ring of the cast-in-place concrete pile 10 is protected by an inner steel cylinder 4. This prevents damage to the concrete pile 10 during handling. Furthermore, the outer steel cylinder 1 and steel base plate 3 encase the concrete pile 10, increasing its structural strength. Multiple bending supports 2 are integrally formed on the outer steel cylinder 1, enhancing its bending strength. After the moving seat 12 is pushed into the bending supports 2, the limiting baffle 15 extends into the guide rail groove 11, preventing the moving seat 12 from moving away from the bending supports 2. At this time, the traveling wheels 38 are in close contact with the surface of the bending supports 2 to prevent movement. When the movable seat 12 slides down freely and braking is required, the switch of the electric telescopic rod 25 is triggered. After the electric telescopic rod 25 is activated, its piston rod extends and pushes the brake disc 26 against one side of the anti-bending frame 2. At this time, the mounting groove 27 is deformed under pressure, which plays an anti-slip role. The brake disc 26 continuously applies force to the anti-bending frame 2 to prevent the movable seat 12 from falling off. When the electric telescopic rod 25 needs to be repaired or replaced, first loosen the bolts on the surface of the water pump 33 and remove the water pump 33 from the recessed groove of the movable seat 12. Then, move the pressure plate 30 to drive the screw 29 to rotate. During the loosening of the screw 29, the pressure plate 30 and the electric telescopic rod 25 are misaligned. At this time, the electric telescopic rod... After the brake disc 26 and the electric telescopic rod 25 are no longer held by the pressure plate 30, the connecting screw between the brake disc 26 and the piston rod of the electric telescopic rod 25 is loosened and removed. The electric telescopic rod 25 can then be pulled out from the mounting slot 23. The replacement electric telescopic rod 25 is pushed into the storage slot 24. The connecting screw is used to fix the brake disc 26 and the piston rod of the electric telescopic rod 25 together. Then, the pressure plate 30 is moved to drive the screw 29 to lock. At this time, the pressure plate 30 holds the electric telescopic rod 25 to prevent the electric telescopic rod 25 from bumping in the storage slot 24. The rubber clamp 31 is clamped between the pressure plate 30 and the electric telescopic rod 25 and deforms. The elasticity of the rubber clamp 31 supports the pressure plate 30 and drives the screw 29 to engage tightly with the screw hole.After the limiting baffle 15 extends into the guide rail groove 11, the rubber clamp 20 is elastically supported between the traction plate 16 and the mounting port 13, preventing the limiting baffle 15 from detaching from the guide rail groove 11 without external pulling. When the movable seat 12 needs to be removed from the anti-bending frame 2, the middle fingers of both hands respectively push the traction plate 16 to squeeze the corresponding rubber clamp 20. After the rubber clamp 20 is deformed by pressure, the traction plate 16 slides along the straightening plate 19, and the limiting baffle 15 moves synchronously with the traction plate 16 until the limiting baffle 15 is pulled out of the guide rail groove 11. At this time, the thumbs and index fingers of both hands grasp the handle 17, and the traction handle 17 drives the movable seat 12 to be pulled out of the anti-bending frame 2. The reason for adding the straightening plate 19 is to ensure that the traction plate 16 slides in a straight line when it is pushed, and after the straightening plate 19 passes through the traction plate 16, it shares the pressure of the limiting baffle 15 being squeezed and pushed against the surface of the guide rail groove 11. This reduces the problem of the limit baffle 15 being squeezed and deformed. When the movable seat 12 needs to be adjusted to move along the anti-bending frame 2, the switch of the electric telescopic rod 25 is triggered. At the same time as the piston rod retracts after the electric telescopic rod 25 is activated, the brake disc 26 no longer clamps the anti-bending frame 2. At this time, the movable seat 12 lacks braking. At this time, the switch of the servo motor 41 is triggered simultaneously with the electric telescopic rod 25. The servo motor 41 drives the walking wheel 38 to rotate. The servo motor 41 is programmed to have two modes: forward rotation and reverse rotation, which facilitates the adjustment of the movable seat 12 to rise and fall along the anti-bending frame 2. When the switch of the servo motor 41 is turned off, the switch of the electric telescopic rod 25 is triggered. The piston rod of the electric telescopic rod 25 extends and pushes the brake disc 26 to clamp the anti-bending frame 2, thereby braking the movable seat 12. After triggering the switch of the water pump 33, the water pump 33 sucks up the water accumulated inside the pit through the water suction pipe 34 and discharges it through the drainage pipe 35.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precast pile foundation for pit support with a bottom-built drainage mechanism, comprising concrete-cast piles (10), characterized in that: The cast-in-place concrete pile (10) is cast between the outer steel cylinder (1) and the inner steel cylinder (4). The bottom ends of the outer steel cylinder (1) and the inner steel cylinder (4) are fixed on the surface of the steel bottom plate (3). A plurality of folding-resistant frames (2) are integrally formed on the surface of the outer steel cylinder (1). The folding-resistant frames (2) are in the shape of "匚"-shaped plate structures. The plurality of folding-resistant frames (2) are arranged and distributed along the inner ring surface of the outer steel cylinder (1), and the folding-resistant frames (2) protrude towards the inner side of the inner ring opening of the outer steel cylinder (1). A steel bar hoop (6) is fixed on the inner ring surface of the folding-resistant frame (2). A vertical steel bar (8) is provided between the steel bar hoop (6) and the outer steel cylinder (1). A moving seat (12) is slidably connected inside one folding-resistant frame (2). An installation opening (13) is formed on the surface of the moving seat (12). A limiting baffle (15) is inserted on the surface of the installation opening (13). One end of the limiting baffle (15) extends into the guide rail groove (11). The guide rail groove (11) is formed on the side plate of the folding-resistant frame (2). An electric telescopic rod (25) is installed on the surface of the moving seat (12). A brake disc (26) is fixed on the piston rod of the electric telescopic rod (25). The brake disc (26) faces the folding-resistant frame (2). A water pump (33) is installed on the surface of the moving seat (12). The suction end of the water pump (33) is connected to a suction pipe (34). The discharge end of the water pump (33) is connected to a discharge pipe (35). And walking wheels (38) are rotatably connected to both ends of the moving seat (12).

2. The precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 1, characterized in that: A plurality of supporting grooves (5) are formed on the inner ring surface of the folding-resistant frame (2). The plurality of supporting grooves (5) are arranged vertically at equal distances and equal sizes along the long side of the folding-resistant frame (2). The steel bar hoop (6) is simultaneously lapped on the bottom surfaces of the plurality of supporting grooves (5). A limiting block (7) is fixed on the inner ring surface of the outer steel cylinder (1). The limiting block (7) is in the shape of a "U"-shaped block. There are multiple groups of the limiting blocks (7). The limiting blocks (7) are located between two adjacent supporting grooves (5). The vertical steel bar (8) passes through the groove body of the limiting block (7) and then abuts against the outer ring surface of the steel bar hoop (6).

3. The precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 1, characterized in that: The steel bottom plate (3) is in the structure of an annular plate. The inner ring diameter of the steel bottom plate (3) is equal to the inner ring pipe diameter of the inner steel cylinder (4). A plurality of notch grooves (9) are formed on the outer ring surface of the steel bottom plate (3). The notch grooves (9) correspond to the folding-resistant frames (2) one by one. The heights of the outer steel cylinder (1), the folding-resistant frames (2), the inner steel cylinder (4), the vertical steel bar (8), and the cast-in-place concrete pile (10) are equal.

4. A precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 1, characterized in that: The guide rail groove (11) is in the shape of a square groove. There are two groups of the guide rail grooves (11). The two groups of guide rail grooves (11) are respectively distributed on the two parallel side plates of the folding-resistant frame (2). The height of the guide rail groove (11) is equal to the height of the folding-resistant frame (2). The moving seat (12) is in the shape of a "凸"-shaped plate structure. A recessed groove one is formed on one side of the moving seat (12). A recessed groove two is formed on the other side of the moving seat (12). The water pump (33) is fixed in the recessed groove one by bolts. An installation groove (23) is formed on the surface of the recessed groove one. A storage groove (24) is formed on the surface of the installation groove (23). The electric telescopic rod (25) is installed in the storage groove (24). The brake disc (26) is located in the recessed groove two.

5. A precast pile foundation for pit support with a bottom-built drainage mechanism as described in claim 4, characterized in that: The brake disc (26) has an insert groove (27) on the side away from the electric telescopic rod (25). The insert groove (27) is a cross-shaped groove. A rubber pad (28) is fixed on the surface of the insert groove (27). The rubber pad (28) has a cross-shaped plate structure. The thickness of the rubber pad (28) is greater than the depth of the insert groove (27). Two screws (29) are screwed onto the surface of the mounting groove (23). The two screws (29) are symmetrically distributed about the storage groove (24). A pressure plate (30) is fixed to one end of the screw (29). A rubber clip (31) is fixed on the side of the pressure plate (30) facing the storage groove (24). The rubber clip (31) is clamped between the electric telescopic rod (25) and the pressure plate (30). Two scooping grooves (32) are opened on the side of the rubber clip (31) facing away from the storage groove (24).

6. A precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 1, characterized in that: The mounting port (13) is provided in two ways. The two mounting ports (13) are symmetrically distributed about the movable seat (12). The side wall of the mounting port (13) is provided with a through-hole (14). The limiting baffle (15) is movably inserted into the through-hole (14). One end of the limiting baffle (15) that extends into the guide rail groove (11) is provided with an inclined surface facing the anti-bending frame (2). The other end of the limiting baffle (15) is fixed with a traction plate (16). Multiple rubber clamps (20) are fixed between the traction plate (16) and the mounting port (13). The surface of the movable seat (12) is fixed with a handle (17). The handle (17) and the traction plate (16) are correspondingly arranged.

7. A precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 6, characterized in that: The surface of the traction plate (16) is provided with a through-hole (18), and there are two sets of through-holes (18). The two sets of through-holes (18) are symmetrically distributed about the rubber clamp (20). A straightening plate (19) is movably inserted into the inside of the through-hole (18). The straightening plate (19) is fixed between the two side walls of the mounting port (13). The surface of the rubber clamp (20) is provided with a round opening, and the inside of the rubber clamp (20) is provided with a reserved groove (21). An elastic support plate (22) is fixed on the surface of the reserved groove (21). The elastic support plate (22) is in the shape of an "Ω" strip. There are two elastic support plates (22), and the two elastic support plates (22) are symmetrically distributed about the round opening.

8. A precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 1, characterized in that: Two bundle handles (36) are fixed to the surface of the movable seat (12). The bundle handles (36) are T-shaped cylinders and are used to wind up the idle water pumping pipe (34) and drain pipe (35).

9. A precast pile foundation for foundation pit support with a bottom-built drainage mechanism as described in claim 1, characterized in that: Both ends of the moving seat (12) are provided with a first side groove (37). The traveling wheels (38) are located inside the first side groove (37). One end of the shaft body of the traveling wheel (38) is rotatably connected in the wheel shaft groove (39). The wheel shaft groove (39) is opened on the side wall of the first side groove (37). The other end of the shaft body of the traveling wheel (38) is fixed on the drive shaft of the servo motor (41). The servo motor (41) is installed in the second side groove (40). The second side groove (40) is opened on the surface of the first side groove (37). The second side groove (40) and the wheel shaft groove (39) are symmetrically distributed with respect to the first side groove (37). The top surface and the bottom surface of the second side groove (40) are both fixed with a retaining bar (42). The servo motor (41) is located between the retaining bar (42) and the second side groove (40). And a fastening plate (43) is buckled on one side of the end of the moving seat (12) where the second side groove (a fastening plate (43) is buckled on one side of the end of the moving seat (12) where the second side groove (40) is located). The fastening plate (43) is in a "C" - shaped plate structure. The fastening plate (43) is fixed on the moving seat (12) by screws.

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