Auxiliary construction device for bottom-expanded rotor steel pipe pile

Abstract

The invention relates to the technical field of civil engineering pile foundations, and discloses an expanded-base rotor steel pipe pile auxiliary construction device which comprises an auxiliary mounting frame arranged on the outer side of a pile body steel pipe and used for positioning and supporting all sections of pile body steel pipes, and a horizontal detector is arranged on the auxiliary mounting frame and used for detecting the horizontal state of the auxiliary mounting frame; the at least three lifting supporting legs are connected to the bottom end of the auxiliary mounting frame, the bottom ends of the lifting supporting legs are connected with anchoring frames, and through holes allowing the anchoring rods to penetrate through are formed in the outer sides of the anchoring frames; a crawler walking mechanism is arranged on the inner side of the anchoring frame. The multi-section steel pipe structure is buried in soil in a rotary cutting mode, the construction process is relatively simple and rapid, the bearing capacity of a single pile is remarkably improved, the horizontal state of the auxiliary mounting frame is detected, the auxiliary mounting frame is adjusted to be in the horizontal state and kept stable, the stability and position precision of the pile body steel pipe are improved, and butt joint of adjacent sections of pile body steel pipes is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering pile foundations, and more specifically, to an auxiliary construction device for expanded bottom rotor steel pipe piles. Background Art

[0002] In construction projects, pile foundation is a commonly used foundation form, and its main function is to transfer the load of the building to the deep stable soil or rock layer. Traditional pile types such as cast-in-place piles and precast piles have some problems in the construction process, such as the long construction period of cast-in-place piles and the difficulty in controlling the quality; precast piles are easily damaged when passing through hard soil layers. In order to solve these problems, some new pile types have emerged in recent years, such as expanded base piles and screw piles. Expanded base piles increase the bearing capacity of the pile by forming an enlarged head at the bottom of the pile; screw piles use the rotation of the spiral blade to screw the pile body into the soil layer, which has a fast construction speed and little impact on the environment.

[0003] In the prior art, for example, the invention patent with application number CN201910334055.9 discloses a multi-stage serial assembled recyclable micro steel pipe pile and a construction method thereof. The first section of the steel pipe pile body is composed of a spiral drill bit, a thick-walled steel pipe and a spirally driven steel pipe connected in series in sequence, and each subsequent section of the pile body is composed of a thick-walled steel pipe and a spirally driven steel pipe arranged and assembled in an interval manner. The multi-stage serial assembled recyclable micro steel pipe pile adopts a combination of thick-walled steel pipe piles and spiral steel pipe piles as the pile body. The drill bit is also provided with a spiral blade, and a small drilling rig can be used to drill the steel pipe into the soil using a clamp.

[0004] When the steel pipe piles are connected to each other in sections, they will inevitably shake and become unbalanced during the hoisting and installation, making it impossible to accurately position them and making assembly more difficult.

[0005] Therefore, it is necessary to propose an auxiliary construction device for expanded bottom rotor steel pipe piles to at least partially solve the problems existing in the prior art. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] In order to at least partially solve the above problems, the present invention provides a bottom-expanding rotor steel pipe pile auxiliary construction device, comprising: Auxiliary mounting frame, which is arranged outside the pile body steel pipe and used for positioning and supporting each section of the pile body steel pipe. A level detector is arranged on the auxiliary mounting frame to detect the horizontal state of the auxiliary mounting frame; Lifting legs, at least three lifting legs are connected to the bottom end of the auxiliary mounting frame, the bottom end of the lifting legs is connected to an anchor frame, the outer side of the anchor frame is provided with a through hole for the anchor rod to pass through; the inner side of the anchor frame is provided with a crawler walking mechanism, the level detector, the lifting legs and the crawler walking mechanism are electrically connected to the controller.

[0008] Preferably, the expanded bottom rotor steel pipe pile includes: a pile body steel pipe, an expanded bottom wing ring and a pile top grouting blind plate. The pile body steel pipe is arranged as a multi-section steel pipe structure, and an injection cavity is provided in the pile body steel pipe; the expanded bottom wing ring is connected to a part of the sections of the pile body steel pipe; the pile top grouting blind plate is connected to the top of the pile body steel pipe, and the joint end of the pile top grouting blind plate is connected to the power end of the drilling rig.

[0009] Preferably, the pile body steel pipe includes a first-section pile steel pipe, multiple standard-section pile steel pipes without expansion wings, and multiple standard-section pile steel pipes with expansion wings. The standard-section pile steel pipe without expansion wings is not provided with a bottom expansion wing ring, and the first-section pile steel pipe and the standard-section pile steel pipe with expansion wings are surrounded by a bottom expansion wing ring; the top of the first-section pile steel pipe, both ends of the standard-section pile steel pipe without expansion wings, and both ends of the standard-section pile steel pipe with expansion wings are all provided with connecting rings, and the connecting rings of adjacent pile body steel pipe segments are connected by bolts; the outer diameter of the connecting ring is smaller than the outer diameter of the bottom expansion wing ring.

[0010] Preferably, the crawler walking mechanism comprises: Travel drive motor, the travel drive motor is installed on the anchor frame; A triangle plate, one side of which is connected to the bottom end of the anchor frame; A driving gear and a driven gear, the driving gear and the driven gear are rotatably connected to the other side of the triangular plate, two driven gears are provided and symmetrically arranged below the driving gear, the driving gear shaft passes through the triangular plate, and the driving gear shaft is connected to the output shaft of the travel drive motor through a sprocket transmission mechanism; The crawler track is wrapped around the outside of the driving gear and the two driven gears, and is meshed and connected with the driving gear and the driven gears.

[0011] Preferably, a support plate is provided above the auxiliary mounting frame, and the support plate comprises: The receiving groove is arranged at the top of the supporting plate, and a through hole is arranged through the center of the receiving groove, the diameter of the through hole is larger than the diameter of the pile body steel pipe, and four slide grooves are arranged in the receiving groove and are evenly arranged along the circumferential direction of the through hole; Lead screw, the lead screw is connected in the slide slot and arranged along its length direction, one end of the lead screw is connected to the lead screw motor, and the four lead screw motors are synchronously controlled; The slider is slidably connected in the slide slot and is threadedly connected to the lead screw. The top of the slider is connected to an electric control rotating seat. The four electric control rotating seats are synchronously controlled; A positioning support rod, the bottom end of the positioning support rod is connected to the electric control rotating seat, the top end of the positioning support rod extends above the through hole, and the top end of the positioning support rod is connected with a positioning clamping claw.

[0012] Preferably, the positioning clamp comprises: The limit seat is connected to the top of the positioning support rod, and the limit seat includes two seat bodies arranged up and down; a clamping claw cavity is arranged at the center of the limit seat, and limit posts are arranged at both ends of the clamping claw cavity; The first clamping arm is provided in two pieces, one end of the two first clamping arms is rotatably connected to the center of the limit seat, and a coil spring is provided at the connection, and the other ends of the two first clamping arms have a tendency to approach each other; The second clamping arm is centrally rotatably connected to the other end of the first clamping arm, a clamping groove is arranged on the opposite side of the second clamping arm, and a top block is arranged on the end of the second clamping arm away from the limiting seat.

[0013] Preferably, the positioning clamp comprises: A clamping block, one side of which is provided with a sliding column, which is slidably connected in the clamping groove and passes through the second clamping arm, and a spring is connected between the clamping block and the clamping groove; A rotating arm, one end of which is hinged to the first clamping arm, and the other end of which is hinged to the sliding column, and a waist-shaped hole is arranged at the hinge.

[0014] Preferably, the auxiliary mounting frame includes a rotation adjustment unit, and the rotation adjustment unit includes: The balancing seat is connected to the center of the auxiliary mounting frame, the upper part of the balancing seat is set as a spherical surface, and a steel pipe pile channel is set in the center of the balancing seat. The spherical surface of the balancing seat is rotatably connected to the through hole on the support plate, and the top of the balancing seat is higher than the support plate; The gear ring, the inner ring end of the gear ring is connected to the outer wall of the balance seat, the outer ring end of the gear ring is evenly provided with latch teeth, and the top end of the gear ring is concentrically provided with an annular groove.

[0015] Preferably, the rotation adjustment unit further includes: Gears, multiple gears are evenly arranged on the outside of the gear ring and meshed with the latch teeth, and the top of the gear shaft of the gear is connected with a guide frame; A guide wheel, which is connected to the bottom end of the guide frame and is rotatably arranged in the annular groove; Rotating motors, multiple rotating motors are evenly installed at the bottom end of the support plate and located above the gears, and the output shafts of the rotating motors are connected to the gear shafts through elastic connectors.

[0016] Preferably, the elastic connecting member comprises: Universal joint, the universal joint is connected to the bottom end of the output shaft of the rotating motor; The telescopic frame includes an end plate, a guide column, a slider and a telescopic rod. The lower end plate is connected to the top of the guide frame; the two guide columns are symmetrically connected between the two end plates; the slider is slidably connected to the guide column, and a spring is sleeved on the guide column, and the spring abuts between the slider and the top end plate; the telescopic rod is connected to the center of the slider, and the top of the telescopic rod passes through the upper end plate and is connected to the universal joint.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention provides an auxiliary construction device for expanded bottom rotor steel pipe piles, which can quickly position the auxiliary mounting frame to the construction position through crawler drive. The horizontal state of the auxiliary mounting frame is detected by a level detector, and the elevating legs are controlled to be extended or shortened based on this, so that it can adapt to the uneven ground of the construction site, and the auxiliary mounting frame is adjusted to a horizontal state and kept stable, thereby improving the stability and position accuracy of the pile body steel pipe, and facilitating the docking of adjacent sections of the pile body steel pipe; and solves the problem that when the weight of the pile body steel pipe is large, the pile body steel pipe shakes or is unbalanced when hoisting is used alone, and cannot be accurately positioned and installed. The pile body steel pipe can also be installed with the auxiliary mounting frame and then moved to the construction position, avoiding interference between hoisting and drilling rigs, and the drilling rig needs to be repositioned after the pile body steel pipe is installed. In addition, the installation of the pile body steel pipe and the auxiliary mounting frame can be carried out simultaneously with the construction process, thereby improving construction efficiency.

[0018] The other advantages, objectives and features of the expanded bottom rotor steel pipe pile auxiliary construction device described in the present invention will be partially reflected through the following description, and will also be partially understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the expanded bottom rotor steel pipe pile in the present invention (the standard section pile steel pipe without expanded wings is connected to the first section pile steel pipe); Figure 2 It is a structural schematic diagram of the expanded bottom rotor steel pipe pile in the present invention (the standard section pile steel pipe with expanded wings is connected to the first section pile steel pipe); Figure 3 It is a schematic diagram of the first section of the steel pipe of the expanded bottom rotor steel pipe pile in the present invention; Figure 4 A schematic diagram of a connecting ring of a bottom-enlarged rotor steel pipe pile in the present invention; Figure 5 It is a structural schematic diagram of the pile top grouting blind plate of the expanded bottom rotor steel pipe pile in the present invention; Figure 6 This is a flow chart of the construction of the expanded bottom rotor steel pipe pile in the present invention; Figure 7 It is a structural schematic diagram of the auxiliary construction device of the bottom rotor steel pipe pile of the present invention; Figure 8 It is a structural schematic diagram of the crawler walking mechanism in the present invention; Fig. 9It is a structural schematic diagram of the auxiliary mounting frame in the present invention; Fig.10 It is a structural schematic diagram of the positioning clamp in the present invention; Fig.11 For the present invention Figure 7 A schematic diagram of the local enlarged structure at point A in the middle; Fig.12 It is a schematic diagram of the structure of the elastic connecting member in the present invention.

[0020] In the figure: 1. First section pile steel pipe; 2. Standard section pile steel pipe without expansion wing; 3. Standard section pile steel pipe with expansion wing; 4. Connecting ring; 5. Expanded bottom wing ring; 6. Pile top grouting blind plate; 7. Pile body steel pipe; 10. Auxiliary mounting frame; 101. Grouting hole; 102. Alloy steel column; 601. Grouting valve interface; 11. Lifting legs; 12. Anchor frame; 13. Anchor rod; 14. Travel drive motor; 15. Sprocket transmission mechanism; 16. Support plate; 17. Triangle plate; 18. Driving gear; 20. Track; 21. Receiving groove; 22. Through hole; 23. Slide groove; 24. . Screw; 25. Slider; 26. Electric control rotating seat; 27. Positioning support rod; 28. Positioning clamp; 31. Limit seat; 32. Limit column; 33. First clamp arm; 34. Second clamp arm; 35. Clamping groove; 36. Clamping block; 37. Rotating arm; 38. Top block; 39. Sliding column; 51. Balance seat; 52. Gear ring; 53. Gear; 54. Annular groove; 55. Gear; 56. Gear shaft; 57. Guide frame; 58. Guide wheel; 59. Rotating motor; 61. Universal joint; 62. End plate; 63. Guide column; 64. Slider; 65. Telescopic rod. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0023] Example 1 like Figure 7 As shown, the present invention provides a bottom-expanding rotor steel pipe pile auxiliary construction device, comprising: Auxiliary mounting frame 10, the auxiliary mounting frame 10 is arranged outside the pile body steel pipe 7, and is used to position and support each section of the pile body steel pipe 7. A level detector is arranged on the auxiliary mounting frame 10 to detect the horizontal state of the auxiliary mounting frame 10; Lifting legs 11, at least three lifting legs 11 are connected to the bottom end of the auxiliary mounting frame 10, the bottom end of the lifting legs 11 is connected to an anchor frame 12, the outer side of the anchor frame 12 is provided with a through hole for the anchor rod 13 to pass through; the inner side of the anchor frame 12 is provided with a crawler walking mechanism, and the level detector, the lifting legs 11 and the crawler walking mechanism are electrically connected to the controller.

[0024] Among them, Figure 1-Figure 6 As shown, the expanded bottom rotor steel pipe pile includes: a pile body steel pipe 7, an expanded bottom wing ring 5 and a pile top grouting blind plate 6. The pile body steel pipe 7 is arranged as a multi-section steel pipe structure, and an injection cavity is arranged in the pile body steel pipe 7; the expanded bottom wing ring 5 is connected to a part of the segment of the pile body steel pipe 7; the pile top grouting blind plate 6 is connected to the top of the pile body steel pipe 7, and the joint end of the pile top grouting blind plate 6 is connected to the power end of the drilling rig.

[0025] The pile body steel pipe 7 includes a first-section pile steel pipe 1, a plurality of standard-section pile steel pipes without expansion wings 2 and a plurality of standard-section pile steel pipes with expansion wings 3. The standard-section pile steel pipe 2 without expansion wings is not provided with a bottom expansion wing ring 5, and the first-section pile steel pipe 1 and the standard-section pile steel pipe 3 with expansion wings are surrounded by a bottom expansion wing ring 5; the top of the first-section pile steel pipe 1, both ends of the standard-section pile steel pipe 2 without expansion wings and both ends of the standard-section pile steel pipe 3 with expansion wings are all provided with connecting rings 4, and the connecting rings 4 of adjacent pile body steel pipe 7 sections are connected by bolts; the outer diameter of the connecting ring 4 is smaller than the outer diameter of the bottom expansion wing ring 5.

[0026] The standard section pile steel pipe without expansion wing 2 and the standard section pile steel pipe with expansion wing 3 are arranged at intervals, and the standard section pile steel pipe without expansion wing 2 is preferentially connected to the first section pile steel pipe 1, or the standard section pile steel pipe with expansion wing 3 is preferentially connected to the first section pile steel pipe 1.

[0027] The bottom expansion wing ring 5 includes two or more involute expansion wings, which are staggeredly connected to the first section pile steel pipe 1 and the standard section pile steel pipe with expansion wings 3, and the axis of the involute expansion wings is staggered with the axis of the pile body steel pipe 7.

[0028] The bottom end of the first section of the pile steel pipe 1 is set as the pile tip breaking end. An alloy steel column 102 is welded to the pile tip area of ​​the first section of the pile steel pipe 1 and a grouting hole 101 is opened at the pile tip. The grouting hole 101 is connected to the injection cavity of the pile body steel pipe 7.

[0029] A grouting valve interface 601 is arranged at the center of the pile top grouting blind plate 6 , the bottom end of the pile top grouting blind plate 6 is connected to the top connecting ring 4 of the pile body steel pipe 7 by bolts, and the grouting valve interface 601 is communicated with the injection cavity in the pile body steel pipe 7 .

[0030] The working principle and beneficial effects of the above technical solution are: The present invention provides an auxiliary construction device for a bottom-enlarged rotor steel pipe pile, which is applied to the construction of a bottom-enlarged rotor steel pipe pile. During the construction, a pile body steel pipe 7, a bottom-enlarged wing ring 5, an alloy steel column 102 and a connecting ring 4 are first manufactured according to preset dimensions, the alloy steel column 102 is welded to the first section of the pile body steel pipe 7, and the bottom-enlarged wing ring 5 and the connecting ring 4 are welded to the pile body steel pipe 7; then the connecting ring 4 at the joint end of the pile body steel pipe 7 is connected to the power end of a drilling rig through bolts, the power of the drilling rig is transmitted to the pile body steel pipe 7 through a flange bolt connection, the alloy steel column 102 at the pile tip breaks the soil layer, the pile body steel pipe 7 and the bottom-enlarged wing ring 5 are rotated and cut into the soil, after being inserted into the soil to a preset depth, the connection between the connecting ring 4 of the first section of the pile body steel pipe 7 and the power end of the drilling rig is removed; the remaining sections of the pile body steel pipe 7 are sequentially connected and constructed according to the above steps, and finally slurry is injected into the pile body steel pipe 7 to increase the horizontal and vertical load resistance of the steel pipe pile.

[0031] The expanded base rotor steel pipe piles are driven into the ground by rotary cutting, and the construction process is relatively simple and quick, which can significantly improve the construction efficiency. At the same time, since there is no need for a large amount of mud treatment and soil discharge operations, the construction time and cost are further saved and the pollution of mud to the environment is reduced. The expanded base rotor steel pipe piles do not require on-site welding, which reduces the risk source of hot work and has higher safety. In addition, due to the high construction efficiency and low material usage, energy consumption and carbon emissions are also reduced, which is in line with the current concept of green building and sustainable development. The expanded base rotor steel pipe piles have high bearing capacity and construction efficiency, which can reduce the number of piles and save material costs. At the same time, they have the advantages of short rest period and high economic benefits. When the steel pipe piles need to resist horizontal loads, concrete, cement slurry, crushed stone + cement slurry can be poured into the pile core steel pipe to increase the steel pipe pile's ability to resist horizontal loads.

[0032] The pile body steel pipe 7 includes a first section pile steel pipe 1 and two or more standard section pile steel pipes 2 without expansion wings and standard section pile steel pipes 3 with expansion wings. Adjacent steel pipe sections are connected in a detachable manner, and multiple sections of steel pipe sections can be bolted together through a connecting ring 4. When the construction height is limited and the operation space is limited, the present invention can manufacture the pile body steel pipe 7 in sections, construct in sections, and bolt multiple sections of steel pipe standard sections through the connecting ring 4. The construction speed is fast and the rest period is short. After the construction is completed, it can be put into use without the curing period of concrete.

[0033] The bottom expansion wing ring 5 includes one or more involute expansion wings, and the bottom expansion wing ring 5 is connected to the drilling end of the first section pile steel pipe 1 and the standard section pile steel pipe 3 with expansion wings; the axis of the involute expansion wing is staggered with the axis of the pile body steel pipe, and the bottom expansion wing ring 5 is welded to the pile body steel pipe at a suitable angle according to different soil layers, which is beneficial to improve its drilling and breaking effect in different soil environments.

[0034] The steel pipe pile is provided with a pile top grouting blind plate 6, and the grouting port of the pile top grouting blind plate 6 is communicated with the cavity in the pile body steel pipe 7, so as to facilitate the injection of cement slurry or other chemical slurry into the pile bottom enlarged head and the soil around the pile.

[0035] The auxiliary construction device is used for the installation of adjacent pile shaft steel pipes 7, and the specific working principle is as follows: When the pile body steel pipes 7 of adjacent sections are connected, the standard section steel pipe is hoisted above the standard section steel pipe that has been buried, and the hoisted standard section is clamped and positioned by the auxiliary mounting frame 10 and removed. The controller controls the movement of the crawler walking mechanism, drives the lifting legs 11 to move at the construction position, and the auxiliary mounting frame 10 moves accordingly, so that the center of the auxiliary mounting frame 10 coincides with the drill bit center of the drilling rig, and the position sensor can be used for auxiliary positioning; the level detector detects the horizontal state of the auxiliary mounting frame 10, and when the auxiliary mounting frame 10 tilts, the lifting legs 11 are started to extend or shorten, so that the crawler walking mechanism adapts to the uneven ground of the construction site; the anchor rod 13 can also be connected to the ground through the through hole on the anchor frame 12 to improve the stability of the auxiliary mounting frame 10; the setting of the lifting legs 11 can adjust the height of the auxiliary mounting frame 10 to adapt to standard sections of different lengths, and at the same time facilitate the docking of adjacent sections of the pile body steel pipes 7. After the pile body steel pipe 7 is installed, the auxiliary installation frame 10 is raised to a level higher than the pile body steel pipe 7, the anchor rod 13 is removed, the crawler walking mechanism is moved away from the construction location, and then the pile body steel pipe 7 is connected to the power end of the drilling rig equipment to be rotated and cut into the soil.

[0036] The bottom-enlarged rotor steel pipe pile auxiliary construction device provided by the present invention can quickly position the auxiliary mounting frame 10 to the construction position through crawler drive, and the level detector detects the horizontal state of the auxiliary mounting frame 10, and controls the elongation or shortening of the lifting legs 11 based on this, so that it can adapt to the uneven ground of the construction site, adjust the auxiliary mounting frame 10 to a horizontal state and keep it stable, improve the stability and position accuracy of the pile body steel pipe 7, and facilitate the docking of adjacent sections of the pile body steel pipe 7; solve the problem that when the weight of the pile body steel pipe 7 is large, the pile body steel pipe 7 is shaken or unbalanced by hoisting alone, and cannot be accurately positioned and installed. The pile body steel pipe 7 can also be installed with the auxiliary mounting frame 10 and then moved to the construction position, avoiding interference between hoisting and drilling rigs, and the drilling rig needs to be repositioned after the pile body steel pipe 7 is installed, and the installation of the pile body steel pipe 7 and the auxiliary mounting frame 10 can be carried out simultaneously with the construction process, thereby improving construction efficiency.

[0037] Based on the above embodiment 1, an engineering application example of a bottom-enlarged rotor steel pipe pile is provided: The project is located in the petrochemical industrial park area of ​​a city in southern my country. Due to the increase in pipeline layer load, the project plans to add a cap in the middle of the corridor and use a pile foundation. The reinforced pile foundation construction of this project is located below the existing corridor, with a net construction height of about 3.5~4.3m. The pile foundation construction is carried out in a space of only about 3.5~4.3m in operation space, which is an ultra-low clearance construction and is very difficult to construct. During the construction, the corridor pipelines will not stop running, and it is necessary to ensure the safe height and horizontal range of the construction and that vibration does not affect the operation. The pipelines are all toxic and harmful substances, with extremely high safety requirements and great danger.

[0038] The soil layers in the site are distributed as follows: Plain fill; medium sand; pebbles; silty clay containing pebbles and gravels; silty clay; completely weathered mudstone.

[0039] According to the conventional pile foundation design, the pile diameter of this project is 500mm, the wall thickness is 8mm, and the pile length needs to reach 17m. The fully weathered mudstone layer is used as the bearing layer to meet the bearing capacity requirements. The construction of a pile foundation with a pile length of 17m and a pile diameter of 500mm in a clearance of about 3.5~4.3m is very difficult, expensive, and has a long construction period. The use of expanded bottom rotor steel pipe piles only requires one expanded bottom rotor steel pipe pile with a total pile length of 8~16m, a standard section pile length of 1.5~2m, a pile diameter of 325mm, and an expanded wing of 650mm to be constructed in sections for each cap. The pebble layer or silty clay is used as the bearing layer to meet the bearing capacity requirements. Compared with conventional processes, the construction period can be saved by more than 50%, and the cost can be saved by 20%~50%.

[0040] Successful implementation process of the method: During the implementation of this project, since the construction net height was restricted and the construction area was located in the production unit area where open flame welding was not suitable, the specifications of the expanded bottom rotor steel pipe piles were selected: pile diameter 325mm, steel pipe wall thickness 8mm, expanded bottom wing ring 650mm, first section pile steel pipe length 2m, standard section pile steel pipe length 1.5m, standard sections and standard sections, and standard sections and first sections are connected with bolted connectors.

[0041] The specific steps of this project construction are as follows: According to the design requirements, the appropriate sizes of the pile steel pipe 7 and the bottom wing ring 5 are selected, and multiple standard section pile steel pipes 2 without wing expansion and standard section pile steel pipes 3 with wing expansion are manufactured. A connecting ring 4 is provided at the connection of multiple steel pipe standard section piles, and two adjacent steel pipe standard sections are firmly connected by the connecting ring 4 to form a pile steel pipe 7 that meets the preset length requirements, and the bottom wing ring 5 is installed at a preset angle on the first section pile steel pipe 1 at the bottom of the pile steel pipe 7. Then, the first section pile steel pipe 1 is connected to the drilling rig power head using appropriate drilling equipment, and the drilling rig power is transmitted to the steel pipe pile to break the soil layer below through the alloy steel column 102 and the bottom wing ring 5 is rotated and cut into the soil.

[0042] After the first section of the pile steel pipe 1 is buried to a certain depth, the piles are connected, and the standard section of the steel pipe is bolted together through the connecting ring 4, and the above steps are repeated until the design elevation is reached; When the steel pipe pile needs to resist horizontal and vertical loads, cement slurry can be poured into the pile body steel pipe 7 to increase the bearing capacity of the steel pipe pile; grouting ports can be reserved on the pile side and pile end, and grouting on the pile side and pile end can increase the pile side and pile end resistance, further improving the horizontal and vertical bearing capacity of the pile foundation.

[0043] Example 2 like Figure 8 As shown, based on the above embodiment 1, the crawler walking mechanism includes: A travel drive motor 14, which is mounted on the anchor frame 12; A triangular plate 17, one side of which is connected to the bottom end of the anchor frame 12; The driving gear 18 and the driven gear are rotatably connected to the other side of the triangular plate 17. Two driven gears are provided and symmetrically arranged below the driving gear 18. The rotating shaft of the driving gear 18 passes through the triangular plate 17. The rotating shaft of the driving gear 18 is connected to the output shaft of the travel drive motor 14 through the sprocket transmission mechanism 15. The crawler track 20 surrounds the driving gear 18 and the outsides of the two driven gears, and is meshed and connected with the driving gear 18 and the driven gears.

[0044] The working principle and beneficial effects of the above technical solution are: When the crawler walking mechanism is in use, the walking drive motor 14 is started, and a reducer can be set at the output end of the walking drive motor 14. The output end of the reducer is connected to the driving sprocket shaft to drive the driving sprocket to rotate. The driving sprocket drives the driven sprocket to rotate through the transmission chain. A tensioning wheel can be set on the inner side of the transmission chain; the driven sprocket shaft drives the driving gear 18 to rotate, and the driving gear 18 drives the crawler 20 to rotate. The crawler 20 is meshed with the driven gear for transmission, thereby realizing the crawler 20 to rotate around the driving gear 18 and the driven gear; the bottom of the crawler 20 is in contact with the ground, thereby realizing flexible walking at the construction location.

[0045] Through the above-mentioned structural design, the auxiliary mounting frame 10 can walk at the construction location under the control of the controller and flexibly adjust its position without manual handling, thereby reducing the difficulty of construction operations; by adopting the crawler walking mode, the crawler 20 between the two driven gears can undergo a small amount of deformation, which can better adapt to the uneven construction ground and reduce the impact of the uneven ground on the auxiliary mounting frame 10.

[0046] Example 3 like Figure 7 , Fig. 9 As shown, on the basis of the above-mentioned embodiment 1, a support plate 16 is arranged above the auxiliary mounting frame 10, and the support plate 16 includes: The receiving groove 21 is arranged at the top of the support plate 16, and a through hole 22 is arranged through the center of the receiving groove 21. The diameter of the through hole 22 is larger than the diameter of the pile body steel pipe 7. Four slide grooves 23 are arranged in the receiving groove 21 and are evenly arranged along the circumferential direction of the through hole 22. Lead screw 24, the lead screw 24 is connected in the slide slot 23 and arranged along the length direction thereof, one end of the lead screw 24 is connected to a lead screw motor, and the four lead screw motors are synchronously controlled; The slider 25 is slidably connected in the slide slot 23 and is threadedly connected to the lead screw 24. The top of the slider 25 is connected to an electrically controlled rotating seat 26. The four electrically controlled rotating seats 26 are synchronously controlled. The positioning support rod 27 has a bottom end connected to the electric control rotating seat 26 , a top end of the positioning support rod 27 extends upwardly to the through hole 22 , and a positioning clamp 28 is connected to the top end of the positioning support rod 27 .

[0047] The working principle and beneficial effects of the above technical solution are: When the auxiliary mounting frame 10 is not in use, the slider 25 is located at the end of the lead screw 24 away from the through hole 22, and the electrically controlled rotating seat 26 rotates the positioning support rod 27 to a nearly horizontal position and close to the lead screw 24, so that the positioning support rod 27 is stored in the receiving groove 21; when the auxiliary mounting frame 10 is in use, the electrically controlled rotating seat 26 is started to drive the positioning support rod 27 to rotate so that it is tilted upward relative to the auxiliary mounting frame 10 and maintains a preset angle; the standard section is placed in the through hole 22 from above by hoisting, and the diameter of the through hole 22 is larger than the diameter of the standard section; then the lead screw motor is started The screw 24 is driven to rotate, and the screw 24 and the slider 25 are threadedly transmitted, so that the slider 25 slides along the slide groove 23 and approaches the through hole 22, so that the positioning claw 28 of the positioning support rod 27 contacts the upper part of the standard section; under the joint action of the four positioning support rods 27 and the positioning claw 28, the standard section is positioned to the center of the auxiliary mounting frame 10; finally, the connection between the hoisting and the standard section is released, and the standard section of the pile body steel pipe 7 moves downward a small amount under the action of gravity, so that the positioning claw 28 abuts against the connecting ring 4 at the top of the standard section, maintaining the stability of the upper part of the standard section of the pile body steel pipe 7.

[0048] Through the above-mentioned structural design, when the auxiliary mounting frame 10 is not in use, the positioning support rod 27 can be stored in the accommodating groove 21 of the support plate 16, thereby reducing the influence of the auxiliary mounting frame 10 on the stability of the positioning support rod 27 during its movement; when the auxiliary mounting frame 10 is in use, the angle of the positioning support rod 27 can be flexibly adjusted, and the standard section of the pile body steel pipe 7 can be synchronously clamped around, and the standard section of the pile body steel pipe 7 can be quickly positioned to its center, and can adapt to pile body steel pipes 7 of different diameters; the positioning support rod 27 is tilted to the standard section of the pile body steel pipe 7, and when the pile steel pipe 3 with a standard section of expanded wings is installed, the expanded bottom wing ring 5 on it can be avoided to reduce the collision with the expanded bottom wing ring 5; and the top end of the tilted positioning support rod 27 is supported on the connecting ring 4, so that the overall support stability is better.

[0049] Example 4 like Fig.10 As shown, based on the above-mentioned embodiment 3, the positioning clamp 28 includes: The limiting seat 31 is connected to the top of the positioning support rod 27. The limiting seat 31 includes two seat bodies arranged up and down. A clamping claw cavity is arranged at the center of the limiting seat 31, and limiting posts 32 are arranged at both ends of the clamping claw cavity. The first clamping arms 33 are provided in two numbers, one end of the two first clamping arms 33 is rotatably connected to the center of the limiting seat 31, and a coil spring is provided at the connection, and the other ends of the two first clamping arms 33 tend to approach each other; A second clamping arm 34, the center of the second clamping arm 34 is rotatably connected to the other end of the first clamping arm 33, a clamping groove 35 is provided on the opposite side of the second clamping arm 34, and a top block 38 is provided on the end of the second clamping arm 34 away from the limiting seat 31; A clamping block 36, a sliding post 39 is provided on one side of the clamping block 36, the sliding post 39 is slidably connected in the clamping groove 35 and passes through the second clamping arm 34, and a spring is connected between the clamping block 36 and the clamping groove 35; The rotating arm 37 has one end hinged to the first clamping arm 33 and the other end hinged to the sliding column 39 and a waist-shaped hole is provided at the hinge.

[0050] The working principle and beneficial effects of the above technical solution are: When the positioning clamp 28 is in use, the positioning support rod 27 drives the limiting seat 31 to move to a position close to the pile body steel pipe 7, and the clamping block 36 contacts the pile body steel pipe 7. The positioning clamp 28 adapts to the size of the pile body steel pipe 7, pushes the two clamping blocks 36 away from each other, drives one end of the two second clamping arms 34 away from each other, and the coil spring at the connection of the other ends of the two first clamping arms 33 maintains the clamping force of the clamping block 36 on the pile body steel pipe 7, and the limiting column 32 limits the rotation range of the first clamping arm 33; at the same time, the pile body steel pipe 7 presses the clamping block 36 to slide in the clamping groove 35, drives the sliding column 39 to slide on the second clamping arm 34, and then drives the rotating arm 37 to rotate, that is, changes the relative angle between the first clamping arm 33 and the second clamping arm 34, so that the clamping block 36 can better fit on the pile body steel pipe 7; a waist-shaped hole is set at the hinge of the rotating arm 37 and the sliding column 39 to provide a rotation space for the rotating arm 37.

[0051] Through the above structural design, the first clamping arm 33 and the second clamping arm 34 are arranged on the positioning clamping claw 28, and the clamping block 36 on the second clamping arm 34 can be clamped on the pile body steel pipe 7 to position and support the pile body steel pipe 7; the relative angle between the second clamping arm 34 and the first clamping arm 33 is variable, which can adapt to different diameters of the pile body steel pipe 7 and different clamping positions, so that the clamping block 36 always keeps in contact with the pile body steel pipe 7, improves the positioning and clamping effect of the pile body steel pipe 7, and reduces the risk of separation between the pile body steel pipe 7 and the clamping block 36.

[0052] Example 5 like Fig.11 , Fig.12 As shown, based on the above-mentioned embodiment 3, the auxiliary mounting frame 10 includes a rotation adjustment unit, and the rotation adjustment unit includes: The balancing seat 51 is connected to the center of the auxiliary mounting frame 10. The upper part of the balancing seat 51 is set as a spherical surface, and a steel pipe pile channel is set in the center of the balancing seat 51. The spherical surface of the balancing seat 51 is rotatably connected to the through hole 22 on the support plate 16, and the top of the balancing seat 51 is higher than the support plate 16; A gear ring 52, wherein the inner ring end of the gear ring 52 is connected to the outer wall of the balance seat 51, the outer ring end of the gear ring 52 is evenly provided with latch teeth 53, and the top of the gear ring 52 is concentrically provided with an annular groove 54; Gears 55, multiple gears 55 are evenly arranged outside the gear ring 52 and meshed with the latch teeth 53, and the top of the gear shaft 56 of the gear 55 is connected to a guide frame 57; A guide wheel 58, which is connected to the bottom end of the guide frame 57 and is rotatably disposed in the annular groove 54; Rotating motor 59, multiple rotating motors 59 are evenly installed at the bottom end of the support plate 16 and located above the gear 55, and the output shaft of the rotating motor 59 is connected to the gear shaft 56 through an elastic connecting piece.

[0053] The working principle and beneficial effects of the above technical solution are: When the rotation adjustment unit is in use, multiple rotating motors 59 are started synchronously, and the rotating motors 59 drive the gear shaft 56 to rotate, so that the gear 55 rotates. The gear 55 meshes with the latching teeth 53 on the outer side of the gear ring 52 for transmission. When the gear 55 rotates, it moves along the circumferential direction of the gear ring 52, thereby driving the upper support plate 16 to rotate horizontally with the balance seat 51 as the center, and the pile body steel pipe 7 itself rotates, so that the through hole of the connecting ring 4 of the pile body steel pipe 7 to be installed corresponds to the through hole of the connecting ring 4 of the pile body steel pipe 7 that has been buried; the gear shaft 56 drives the guide wheel 58 to roll in the annular groove 54 through the guide frame 57, so that the support plate 16 keeps rotating in the horizontal direction.

[0054] Through the above structural design, the angle of the pile body steel pipe 7 itself is effectively adjusted, so that the through hole of the connecting ring 4 of the pile body steel pipe 7 to be installed corresponds to the through hole of the connecting ring 4 of the pile body steel pipe 7 already buried in the ground, which is convenient for bolt installation and improves the assembly efficiency of the pile body steel pipe 7.

[0055] Example 6 like Fig.11 , Fig.12 As shown, based on the above embodiment 5, the elastic connecting member includes: Universal joint 61, universal joint 61 is connected to the bottom end of the output shaft of the rotating motor 59; The telescopic frame includes an end plate 62, a guide column 63, a slider 64 and a telescopic rod 65. The lower end plate 62 is connected to the top of the guide frame 57; the two guide columns 63 are symmetrically connected between the two end plates 62; the slider 64 is slidably connected to the guide column 63, and a spring is sleeved on the guide column 63, and the spring abuts between the slider 64 and the top end plate 62; the telescopic rod 65 is connected to the center of the slider 64, and the top of the telescopic rod 65 passes through the upper end plate 62 and is connected to the universal joint 61.

[0056] The working principle and beneficial effects of the above technical solution are: During the movement of the auxiliary mounting frame 10 and the construction process, the pile body steel pipe 7 may tilt due to external forces and external environment, so that one side of the positioning clamping claw 28 is subjected to greater force. By setting the elastic connector, the elastic connector does not deform when the pile body steel pipe 7 is normally positioned and supported; when the pile body steel pipe 7 is subjected to a force exceeding a preset range, it tilts, driving the support plate 16 to tilt, and the support plate 16 rotates around the spherical surface of the balance seat 51, driving the joint of the universal joint 61 below to bend, and at the same time the universal joint 61 squeezes or pulls the telescopic rod 65, and the telescopic rod 65 drives the slider 64 to slide on the guide column 63, so that the length of the entire telescopic frame becomes shorter or longer, and then when the rotating motor 59 is in motion, the torque can still be transmitted even in a tilting state, ensuring reliable rotation adjustment; and after the artificial external force or external environmental wind force and other factors disappear or weaken, it automatically resets to the original positioning state under the elastic action of the spring; the unbalanced force on the positioning clamp 28 is effectively reduced by rotating the support plate 16, and the positioning clamp 28 is kept in a fitting state with the pile body steel pipe 7, effectively preventing the pile body steel pipe 7 from falling off due to external force.

[0057] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An auxiliary construction device for expanded bottom rotor steel pipe piles, characterized in that: include: An auxiliary mounting frame (10), the auxiliary mounting frame (10) being arranged outside the pile body steel pipe (7) and used for positioning and supporting each section of the pile body steel pipe (7), and a level detector being arranged on the auxiliary mounting frame (10) and used for detecting the horizontal state of the auxiliary mounting frame (10); A lifting leg (11), at least three lifting legs (11) are connected to the bottom end of the auxiliary mounting frame (10), the bottom end of the lifting leg (11) is connected to an anchor frame (12), the outer side of the anchor frame (12) is provided with a through hole for the anchor rod (13) to pass through; the inner side of the anchor frame (12) is provided with a crawler walking mechanism, and the level detector, the lifting leg (11) and the crawler walking mechanism are electrically connected to the controller.

2. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 1 is characterized in that: The expanded bottom rotor steel pipe pile comprises: a pile body steel pipe (7), an expanded bottom wing ring (5) and a pile top grouting blind plate (6); the pile body steel pipe (7) is arranged as a multi-section steel pipe structure, and an injection cavity is arranged in the pile body steel pipe (7); the expanded bottom wing ring (5) is connected to a part of the sections of the pile body steel pipe (7); the pile top grouting blind plate (6) is connected to the top of the pile body steel pipe (7), and the joint end of the pile top grouting blind plate (6) is connected to the power end of the drilling rig.

3. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 1, characterized in that: The pile body steel pipe (7) comprises a first section pile steel pipe (1), a plurality of standard section pile steel pipes without expansion wings (2) and a plurality of standard section pile steel pipes with expansion wings (3); the standard section pile steel pipe without expansion wings (2) is not provided with a bottom expansion wing ring (5); the first section pile steel pipe (1) and the standard section pile steel pipe with expansion wings (3) are connected by a surrounding bottom expansion wing ring (5); the top of the first section pile steel pipe (1), both ends of the standard section pile steel pipe without expansion wings (2) and both ends of the standard section pile steel pipe with expansion wings (3) are all provided with connecting rings (4); the connecting rings (4) of adjacent sections of the pile body steel pipe (7) are connected by bolts; the outer diameter of the connecting ring (4) is smaller than the outer diameter of the bottom expansion wing ring (5).

4. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 1, characterized in that: The crawler walking mechanism includes: A travel drive motor (14), wherein the travel drive motor (14) is mounted on the anchor frame (12); A triangular plate (17), one side of the triangular plate (17) being connected to the bottom end of the anchor frame (12); A driving gear (18) and a driven gear, the driving gear (18) and the driven gear are rotatably connected to the other side of the triangular plate (17), two driven gears are provided and symmetrically arranged below the driving gear (18), the rotating shaft of the driving gear (18) passes through the triangular plate (17), and the rotating shaft of the driving gear (18) is connected to the output shaft of the travel drive motor (14) through a sprocket transmission mechanism (15); The crawler belt (20) surrounds the outer sides of the driving gear (18) and the two driven gears, and is meshed and connected with the driving gear (18) and the driven gears.

5. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 1, characterized in that: A support plate (16) is arranged above the auxiliary mounting frame (10), and the support plate (16) comprises: A receiving groove (21), the receiving groove (21) is arranged at the top of the support plate (16), and a through hole (22) is arranged through the center of the receiving groove (21), the diameter of the through hole (22) is larger than the diameter of the pile body steel pipe (7), and four slide grooves (23) are arranged in the receiving groove (21) and are evenly arranged along the circumferential direction of the through hole (22); A lead screw (24), the lead screw (24) is connected to the slide groove (23) and arranged along the length direction thereof, one end of the lead screw (24) is connected to a lead screw motor, and the four lead screw motors are synchronously controlled; A slider (25), the slider (25) is slidably connected in the slide groove (23) and is threadedly connected to the lead screw (24), the top of the slider (25) is connected to an electric control rotating seat (26), and the four electric control rotating seats (26) are synchronously controlled; A positioning support rod (27), wherein the bottom end of the positioning support rod (27) is connected to the electric control rotating seat (26), the top end of the positioning support rod (27) extends upwardly from the through hole (22), and the top end of the positioning support rod (27) is connected to a positioning clamping claw (28).

6. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 5, characterized in that: The positioning jaws (28) include: A limit seat (31), the limit seat (31) is connected to the top end of the positioning support rod (27), and the limit seat (31) comprises two seat bodies arranged upper and lower; a clamping claw cavity is arranged at the center of the limit seat (31), and limit posts (32) are arranged at both ends of the clamping claw cavity; A first clamping arm (33), wherein two first clamping arms (33) are provided, one end of the two first clamping arms (33) is rotatably connected to the center of the limiting seat (31), and a coil spring is provided at the connection, and the other ends of the two first clamping arms (33) tend to approach each other; The second clamping arm (34) is centrally rotatably connected to the other end of the first clamping arm (33), a clamping groove (35) is provided on the opposite side of the second clamping arm (34), and a top block (38) is provided on the end of the second clamping arm (34) away from the limiting seat (31).

7. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 6, characterized in that: The positioning jaws (28) include: A clamping block (36), a sliding column (39) is provided on one side of the clamping block (36), the sliding column (39) is slidably connected in the clamping groove (35) and passes through the second clamping arm (34), and a spring is connected between the clamping block (36) and the clamping groove (35); A rotating arm (37) is hinged at one end to the first clamping arm (33), and at the other end to the sliding column (39), and a waist-shaped hole is provided at the hinged position.

8. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 5, characterized in that: The auxiliary mounting frame (10) comprises a rotation adjustment unit, and the rotation adjustment unit comprises: A balancing seat (51), the balancing seat (51) is connected to the center of the auxiliary mounting frame (10), the upper portion of the balancing seat (51) is arranged as a spherical surface, and a steel pipe pile channel is arranged at the center of the balancing seat (51), the spherical surface of the balancing seat (51) is rotatably connected to the through hole (22) on the support plate (16), and the top end of the balancing seat (51) is higher than the support plate (16); The gear ring (52) has an inner ring end connected to the outer wall of the balance seat (51), the outer ring end of the gear ring (52) is evenly provided with latch teeth (53), and the top of the gear ring (52) is concentrically provided with an annular groove (54).

9. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 8, characterized in that: The rotary adjustment unit also includes: Gears (55), a plurality of gears (55) are evenly arranged on the outside of the gear ring (52) and meshed with the latch teeth (53), and a guide frame (57) is connected to the top of the gear shaft (56) of the gear (55); A guide wheel (58), the guide wheel (58) is connected to the bottom end of the guide frame (57) and is rotatably disposed in the annular groove (54); A rotating motor (59), wherein a plurality of rotating motors (59) are evenly mounted on the bottom end of the support plate (16) and are located above the gear (55), and an output shaft of the rotating motor (59) is connected to the gear shaft (56) via an elastic connecting piece.

10. The bottom-enlarged rotor steel pipe pile auxiliary construction device according to claim 9, characterized in that: The elastic connector includes: A universal joint (61), the universal joint (61) being connected to the bottom end of the output shaft of the rotating motor (59); The telescopic frame comprises an end plate (62), a guide column (63), a slider (64) and a telescopic rod (65), wherein the lower end plate (62) is connected to the top of the guide frame (57); the two guide columns (63) are symmetrically connected between the two end plates (62); the slider (64) is slidably connected to the guide column (63), a spring is sleeved on the guide column (63), and the spring abuts between the slider (64) and the top end plate (62); the telescopic rod (65) is connected to the center of the slider (64), and the top of the telescopic rod (65) passes through the upper end plate (62) and is connected to the universal joint (61).

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