Combined steel pipe composite pile driving method

Abstract

The application belongs to the technical field of building construction, and particularly relates to a combined steel pipe composite pile driving method, which comprises pile driving preparation: selecting a first pile position at a construction site, and making a drilling mechanism on the lower surface of a guide frame carry out foundation pit excavation; steel pipe vibration sinking of the composite pile: using a propelling mechanism on the guide frame to push the prefabricated composite pile steel pipe downwards section by section, and using a vibration sinking mechanism to insert the composite pile steel pipe into the ground until the designed pile length is reached. The combined steel pipe composite pile driving method is characterized in that: the driven bevel gear disc rotates along with the rotation of the driving bevel gear, and then drives the spiral rod to rotate, so that the tooth groove rod clamped on the outer surface moves along the track of the spiral rod to the center of the driven bevel gear disc, the four single spiral drill rods can be gathered and combined into a complete drilling spiral rod, and then the drilling spiral rod can rotate under the rotation of the driving pipe to break the marked point rock layer, thereby reducing the friction resistance between the composite pile steel pipe and the inner side of the soil.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a method for driving composite steel pipe piles. Background Technology

[0002] Composite steel pipe piles are a new type of infrastructure construction material, composed of steel pipes and concrete. Traditional steel pipe piles and concrete piles each have their drawbacks; for example, steel pipe piles lack load-bearing capacity and seismic performance, while concrete piles are susceptible to corrosion and fatigue damage. Composite steel pipe piles combine the advantages of both, exhibiting high load-bearing capacity, seismic performance, and durability.

[0003] In the installation of composite steel pipe piles, vibratory hammers or impact hammers are typically used. Vibratory hammers utilize mechanical vibration to gradually push the steel pipe pile into the ground along a designed trajectory, offering advantages such as low noise, low vibration, and minimal impact on the surrounding environment. However, vibratory hammers require longer operating times and consume more energy. Impact hammers, on the other hand, apply a heavy impact force to gradually advance the steel pipe pile into the ground, offering advantages such as high speed and efficiency, but generating noise and vibration, which can have some impact on the surrounding environment.

[0004] Furthermore, during the installation of composite steel pipe piles, the hardness of the ground rock layer makes it difficult for the composite steel pipes to sink. The guide frame is usually fixedly installed on one side of the support bridge and drilling platform. Therefore, how to drill within the fixed guide frame is a key consideration. At the same time, the composite pile steel pipe will rebound due to impact, making it difficult to control the pile driving depth. Therefore, the present invention solves the above-mentioned technical problems. Summary of the Invention

[0005] Based on the aforementioned technical problems, this invention proposes a method for driving combined steel pipe composite piles.

[0006] This invention proposes a method for driving composite steel pipe piles, the method comprising:

[0007] Determine design parameters: Based on the project requirements and geological conditions, determine the design parameters of the composite steel pipe pile, including pile length, pile diameter, steel pipe material and thickness;

[0008] Prepare construction equipment: After the trestle bridge and drilling platform are erected, use a crane to install a sunken guide frame on the trestle bridge platform. The guide frame is designed with steel sections. Lay out the position of the guide frame at the top load-bearing beam of the steel pipe pile of the drilling platform and mark it. The guide frame is supported and installed to the marked position of the load-bearing beam and welded firmly.

[0009] Positioning of composite pile steel pipe: After the guide frame is firmly positioned and welded, the bottom section of the composite pile steel pipe is hoisted to the guide frame and suspended 1m above the ground. The initial positioning is made by measuring and setting out the points at the top of the guide frame platform, and then fine-tuned by measuring with a total station.

[0010] Piling preparation: Select the location of the first pile at the construction site and use the drilling mechanism on the lower surface of the guide frame to excavate the foundation pit;

[0011] Composite pile steel pipe vibratory sinking: The prefabricated composite pile steel pipe is pushed down section by section using the propulsion mechanism on the guide frame, and the composite pile steel pipe is inserted into the ground using the vibratory sinking mechanism until the designed pile length is reached.

[0012] Preferably, the guide frame has a cylindrical hole through its middle surface, and the propulsion mechanism is located inside the cylindrical hole and moves up and down on its inner wall to push the clamped composite pile steel pipe downward. The propulsion mechanism includes a clamping tube that is symmetrically distributed vertically and has grooves on its inner wall.

[0013] The drilling mechanism is connected to the lower surface of the guide frame and extends and rotates downward to excavate a foundation pit on the ground. The drilling mechanism includes single spiral drill rods distributed in a ring array and converged.

[0014] The vibratory sinking mechanism clamps the composite pile steel pipe pile on the outer surface of the upper end and sinks it through impact and vibration. The vibratory sinking mechanism includes a vibratory motor.

[0015] Preferably, the drilling mechanism further includes push cylinders that are obliquely symmetrically distributed and fixedly connected to the lower surface of the guide frame's bottom plate. The piston rod of the push cylinder is fixedly connected to a support base plate with a mounting hole through its middle surface. A rotating bearing is rotatably connected to the inner wall of the mounting hole of the support base plate, and a drive tube is fixedly connected to the inner surface of the inner ring of the rotating bearing.

[0016] With the above technical solution, the guide frame is generally fixedly installed on one side of the support bridge and drilling platform. In order to facilitate the breaking of the rock strata at the marked point for the installation of composite pile steel pipes, the lower surface of the composite pile steel pipe is controlled to be horizontal with the lower surface of the bottom plate of the guide frame. Then, the cylinder is pushed to move, pushing the support base plate downward so that the single spiral drill rod contacts the ground. The rotation of the gathered single spiral drill rods can break the ground. After that, the gathered single spiral drill rods disperse, and the composite pile steel pipe is vibrated and driven.

[0017] Preferably, the drilling mechanism further includes a ring gear fixedly sleeved on the outer surface of the drive tube, a drilling motor fixedly connected to the lower surface of the support base plate, and a drive gear fixedly connected to the outer surface of the output shaft of the drilling motor via a coupling, wherein the outer surface of the drive gear meshes with the outer surface of the ring gear.

[0018] The above technical solution, in order to drive the drive tube to rotate within the inner ring of the rotating bearing and thus realize the rotation of the single auger drill rod, controls the drilling motor to start, which in turn controls the drive gear to rotate, thereby causing the drive tube to rotate under the meshing of the ring gear, and thus breaking through the rock surface.

[0019] Preferably, the drilling mechanism further includes a rotating groove formed inside the drive tube, a driven bevel gear disk rotatably connected to the inner wall of the rotating groove, the outer surface of the composite pile steel pipe being slidably connected to the inner surface of the driven bevel gear disk, a drive motor being installed on the side wall of the drive tube, the output shaft of the drive motor extending into the interior of the rotating groove and being fixedly connected to a driving bevel gear via a coupling, the outer surface of the driving bevel gear meshing with the outer surface of the driven bevel gear disk.

[0020] Through the above technical solution, in order to drive the dispersion and convergence of individual spiral drill rods, the drive motor controls the rotation of the active bevel gear, so that the driven bevel gear disk meshing with it rotates on the inner wall of the rotating groove, thereby enabling the individual spiral drill rods in the ring array to converge or disperse under linkage.

[0021] Preferably, a rotating rod is fixedly connected to the lower surface of the driven bevel gear disk, and slots are distributed in a ring array on the lower surface of the drive tube. The inward end of the slot is fixedly connected to the interior of the rotating groove. A toothed rod with a toothed groove on its upper surface is slidably engaged with the inner wall of the slot. The inner surface of the toothed rod is slidably engaged with the outer surface of the rotating rod. The upper surface of the single spiral drill rod is fixedly connected to the lower surface of the toothed rod.

[0022] Through the above technical solution, in order to drive the individual spiral drill rods to gather or disperse under the rotation of the driven bevel gear disk, thereby connecting the individual spiral drill rods with the toothed rods on the outer surface of the rotating rod, the driven bevel gear disk rotates along with the rotation of the driving bevel gear, thereby driving the rotating rod to rotate. This causes the toothed rods engaged on the outer surface to move along the trajectory of the rotating rod towards or away from the center of the driven bevel gear disk. When the toothed rods move towards the center of the driven bevel gear disk, the four individual spiral drill rods can be gathered and merged into a complete drilling spiral rod. Then, under the rotation of the drive tube, the drilling spiral rod can be rotated to achieve the breaking of the marked rock layer.

[0023] Preferably, the vibratory sinking mechanism includes a support ring tube movably sleeved on the outer surface of the upper end of the composite pile steel pipe. The vibratory motor is fixedly installed on one side of the outer surface of the support ring tube. Clamping cylinders are fixedly connected to the outer surface of the support ring tube in a ring array. The outer surface of the piston rod of the clamping cylinder extends to the inner surface of the support ring tube and is fixedly connected to a clamping ring. The inner surface of the clamping ring is made of rubber. The inner surface of the clamping ring slides in contact with the outer surface of the composite pile steel pipe. Mounting blocks are fixedly installed on the outer surface of the support ring tube at uniform intervals. Hydraulic jacks are mounted on the surface of the mounting blocks. A vibratory hammer is fixedly connected to the upper surface of the piston rod of the hydraulic jack. The lower surface of the vibratory hammer is fixedly connected to the upper surface of the composite pile steel pipe.

[0024] Through the above technical solution, in order to clamp the composite pile steel pipe pile and facilitate its upper surface vibration to sink it, a support ring pipe is sleeved on the outer surface of the composite pile steel pipe. Then, the clamping cylinder on its outer surface is activated to make the clamping ring hold the outer surface of the composite pile steel pipe tightly. In order to achieve the vibration of the composite pile steel pipe, the hydraulic jack on the mounting block is used to lift the vibratory hammer upward and then release it, so that the vibratory hammer impacts the upper surface of the composite pile steel pipe and sinks it. In order to improve the sinking efficiency of the composite pile steel pipe, the vibration motor on the outer surface of the support ring pipe is activated when impacting the composite pile steel pipe, so that the composite pile steel pipe vibrates during the impact sinking process and increases its sinking rate.

[0025] Preferably, the propulsion mechanism further includes pulleys symmetrically distributed on the outer surface of the retaining pipe, and grooves symmetrically distributed on the inner wall of the cylindrical hole of the guide frame. The outer surface of the pulley is slidably connected to the inner wall of the groove. Guide wheels are installed on the opposite side surfaces of the two retaining pipes in a ring array through support ear plates. The outer surface of the guide wheel is in slidable contact with the outer surface of the composite pile steel pipe. Limiting rings with the guide wheels on their surfaces are fixedly connected to the inner side walls of the upper and lower ends of the cylindrical hole of the guide frame.

[0026] The above technical solution aims to guide the sinking composite pile steel pipe through the guide frame. The composite pile steel pipe is inserted into the inner surface of two clamping pipes inside the guide frame. The guide wheels guide and limit the sinking composite pile steel pipe. In order to facilitate the advancement of the sinking composite pile steel pipe and facilitate better pile driving, the two clamping pipes alternately move up and down on the inner wall of the cylindrical hole of the guide frame, which can clamp and deliver the composite pile steel pipe. The two limiting rings can limit the movement distance of the two clamping pipes inside the guide frame.

[0027] Preferably, the propulsion mechanism includes elastic clamps fixedly installed in a ring array on the inner wall of the pipe-holding groove. The other ends of the multiple elastic clamps are tapered. A rubber balloon is fixedly connected to the inner surface of the elastic clamps. The outer surface of the rubber balloon slides in contact with the outer surface of the composite pile steel pipe. A fixing ring is movably sleeved on the outer surface of the elastic clamps. The outer surface of the fixing ring is slidably connected to the inner side wall of the pipe-holding groove through a key and keyway. A jacking cylinder is fixedly connected to the inner top wall of the pipe. The outer surface of the piston rod of the jacking cylinder is fixedly connected to one side surface of the fixing ring. A return spring is fixedly connected to one side surface of the limiting ring. The free end of the return spring is fixedly connected to one side outer surface of the pipe.

[0028] Through the above technical solution, in order to facilitate the clamping and feeding of the composite pile steel pipe when the clamping pipe is inserted into the clamping pipe and impacts it downwards, the upper clamping pipe clamps and moves the composite pile steel pipe. At this time, the upper clamping pipe clamps and moves the composite pile steel pipe. Then, the jacking cylinder is activated to push the fixing ring to move, thereby retracting the conical elastic clamping plate. During the retraction process, the rubber balloon on the inner surface squeezes the outer surface of the composite pile steel pipe to achieve clamping. As the composite pile steel pipe sinks due to the impact, the upper clamping pipe clamps the composite pile steel pipe and moves downwards within the guide frame, while the lower clamping pipe loosens its clamping of the composite pile steel pipe and moves upwards. In order to achieve the gradual sinking of the composite pile steel pipe, the two clamping pipes are reciprocated by a return spring to achieve the pushing action.

[0029] Preferably, the propulsion mechanism further includes a reduction motor mounted on the outer surface of the guide frame via a connecting block. The outer surface of the output shaft of the reduction motor is fixedly connected to a pulley via a coupling. A discontinuous reciprocating belt is rotatably sleeved on the outer surface of the pulley. The higher end face of the reciprocating belt penetrates the upper surface of the upper limiting ring and is fixedly connected to the upper surface of the upper holding tube. A movable groove with a cylindrical hole communicating with its interior is opened through one side surface of the guide frame. A movable rod is fixedly connected to one side surface of the lower holding tube. The outer surface of the movable rod is slidably engaged with the inner wall of the movable groove. The lower end face of the reciprocating belt is fixedly connected to the upper surface of the movable rod.

[0030] Through the above technical solution, the vibratory hammer resets after one impact to prepare for the second impact, but the vibratory motor keeps the composite pile steel pipe vibrating, causing it to sink due to vibration. To prevent the composite pile steel pipe from rebounding due to the impact of the vibratory hammer, the sinking composite pile steel pipe can be clamped and pushed. Thus, as the vibratory hammer resets, the upper clamping pipe resets, and the elastic clamping plate inside the lower clamping pipe clamps and pushes the composite pile steel pipe downward. To achieve this action, the belt pulley is controlled by the reduction motor to reciprocate, so that the reciprocating belt on its outer surface drives the two clamping pipes to move relative to each other, thereby achieving the clamping and pushing of the composite pile steel pipe.

[0031] The beneficial effects of this invention are as follows:

[0032] 1. By setting up a propulsion mechanism, the composite pile steel pipe can be clamped downwards. During the adjustment process, as the composite pile steel pipe sinks due to impact, the upper clamping pipe moves downwards within the guide frame, while the lower clamping pipe loosens its grip on the composite pile steel pipe and moves upwards. This avoids the composite pile steel pipe from shaking and rebounding due to impact. The propulsion mechanism clamps and propels the composite pile steel pipe as it sinks due to impact, thereby improving its driving efficiency.

[0033] 2. By setting up a drilling mechanism, the drilling mechanism and guide frame can be designed as an integrated unit, allowing it to accurately drill holes at the marked points and break through the surface rock layer during the installation of the composite pile steel pipe. During the adjustment process, the driven bevel gear disk rotates along with the rotation of the driving bevel gear, which in turn drives the rotating rod to rotate. This causes the toothed rod that is engaged on the outer surface to move along the trajectory of the rotating rod towards the center of the driven bevel gear disk, allowing the four individual spiral drill rods to converge and merge into a complete drilling spiral rod. Then, under the rotation of the drive tube, the drilling spiral rod can rotate to break through the rock layer at the marked point, thereby reducing the internal frictional resistance between the composite pile steel pipe and the soil, making it easier to install. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a combined steel pipe composite pile driving method proposed in this invention;

[0035] Figure 2 This is a three-dimensional view of the guide frame structure for a combined steel pipe composite pile driving method proposed in this invention;

[0036] Figure 3 This is a three-dimensional view of the supporting base plate structure of a combined steel pipe composite pile driving method proposed in this invention;

[0037] Figure 4 This is a three-dimensional view of the ring gear structure of a combined steel pipe composite pile driving method proposed in this invention;

[0038] Figure 5 This is a three-dimensional view of the driven bevel gear disk structure of a combined steel pipe composite pile driving method proposed in this invention;

[0039] Figure 6 This is a three-dimensional view of the spiral rod structure of a combined steel pipe composite pile driving method proposed in this invention;

[0040] Figure 7 This is a three-dimensional view of a single spiral drill rod structure for a combined steel pipe composite pile driving method proposed in this invention.

[0041] Figure 8 This is a three-dimensional view of the pipe-holding structure of a combined steel pipe composite pile driving method proposed in this invention;

[0042] Figure 9 This is a three-dimensional view of the guide wheel structure of a combined steel pipe composite pile driving method proposed in this invention;

[0043] Figure 10 This is a three-dimensional view of the elastic clamping plate structure of a combined steel pipe composite pile driving method proposed in this invention;

[0044] Figure 11 This is a three-dimensional view of the fixed ring structure of a combined steel pipe composite pile driving method proposed in this invention;

[0045] Figure 12 This is a three-dimensional view of the reciprocating belt structure of a combined steel pipe composite pile driving method proposed in this invention;

[0046] Figure 13 This is a three-dimensional view of the hydraulic jack structure for a combined steel pipe composite pile driving method proposed in this invention.

[0047] Figure 14 This is a three-dimensional view of the clamping ring structure of a combined steel pipe composite pile driving method proposed in this invention.

[0048] In the diagram: 1. Guide frame; 2. Composite pile steel pipe; 3. Drilling mechanism; 31. Single spiral drill rod; 32. Push cylinder; 33. Support base plate; 34. Rotary bearing; 35. Drive tube; 36. Ring gear; 37. Drilling motor; 38. Drive gear; 40. Driven bevel gear disc; 41. Drive motor; 42. Active bevel gear; 43. Rotating rod; 44. Slot; 45. Gear rod; 5. Vibration sinking mechanism; 51. Vibration motor; 52. Support ring tube; 53. Clamping cylinder; 54. Clamping ring; 55. Mounting block; 56. Hydraulic jack; 57. Vibratory hammer; 6. Propulsion mechanism; 61. Pipe clamp; 62. Pulley; 63. Slide groove; 64. Guide wheel; 65. Limiting ring; 66. Elastic clamping plate; 67. Rubber balloon; 68. Fixing ring; 69. Pushing cylinder; 70. Return spring; 71. Gear motor; 72. Pulley; 73. Reciprocating belt; 75. Moving rod. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] Reference Figures 1-14 A method for driving composite steel pipe piles, the method comprising:

[0051] Determine design parameters: Based on the project requirements and geological conditions, determine the design parameters of the composite steel pipe pile, including pile length, pile diameter, steel pipe material and thickness;

[0052] Prepare construction equipment: After the trestle bridge and drilling platform are erected, use a crane to install the sunken guide frame 1 on the trestle bridge platform. The guide frame 1 is designed with steel sections. Lay out the position of the guide frame 1 at the top load-bearing beam of the steel pipe pile of the drilling platform and mark it. The guide frame 1 is supported and installed to the marked position of the load-bearing beam and welded firmly.

[0053] Positioning of composite pile steel pipe 2: After the guide frame 1 is firmly positioned and welded, the bottom section of composite pile steel pipe 2 is hoisted to the guide frame 1 and suspended 1m above the ground. The initial positioning is made by measuring and setting out the layout points at the top of the guide frame 1 platform, and then fine-tuned by measuring with a total station.

[0054] Piling preparation: Select the location of the first pile at the construction site and have the drilling mechanism 3 on the lower surface of the guide frame 1 excavate the foundation pit;

[0055] Composite pile steel pipe 2 vibration sinking: The prefabricated composite pile steel pipe 2 is pushed down section by section using the propulsion mechanism 6 on the guide frame 1, and the composite pile steel pipe 2 is inserted into the ground using the vibration sinking mechanism 5 until the designed pile length is reached.

[0056] like Figures 2-7As shown, the drilling mechanism 3 is connected to the lower surface of the guide frame 1 and extends and rotates downward to excavate the foundation pit on the ground. The drilling mechanism 3 includes single spiral drill rods 31 distributed in a ring array and clustered together.

[0057] The guide frame 1 is generally fixedly installed on one side of the support bridge and drilling platform. In order to facilitate the breaking of the rock strata at the marked point for the installation of the composite pile steel pipe 2, the drilling mechanism 3 also includes a push cylinder 32 that is obliquely symmetrically distributed and fixedly connected to the lower surface of the bottom plate of the guide frame 1. The piston rod of the push cylinder 32 is fixedly connected to a support base plate 33 with a mounting hole through its middle surface. The inner wall of the mounting hole of the support base plate 33 is rotatably connected to a rotating bearing 34. The inner surface of the inner ring of the rotating bearing 34 is fixedly connected to a drive pipe 35. By pushing the cylinder 32, the support base plate 33 is pushed downward to make the single spiral drill rod 31 contact the ground. The single spiral drill rod 31 then rotates to break the ground. Afterward, the single spiral drill rod 31 disperses, and the composite pile steel pipe 2 is vibrated and driven.

[0058] To drive the drive tube 35 to rotate within the inner ring of the rotating bearing 34 and thus rotate the single spiral drill rod 31, the drilling mechanism 3 further includes a ring gear 36 fixedly sleeved on the outer surface of the drive tube 35. To drive the drive tube 35 to rotate within the inner ring of the rotating bearing 34 and thus rotate the single spiral drill rod 31, a drilling motor 37 is fixedly connected to the lower surface of the support base plate 33. The outer surface of the output shaft of the drilling motor 37 is fixedly connected to a drive gear 38 via a coupling. The outer surface of the drive gear 38 meshes with the outer surface of the ring gear 36, controlling the drilling motor 37 to start, thereby controlling the drive gear 38 to rotate. Thus, under the meshing of the ring gear 36, the drive tube 35 rotates, thereby breaking through the rock surface.

[0059] To drive the dispersion and convergence of the individual spiral drill rods 31, the drilling mechanism 3 also includes a rotating groove inside the drive tube 35. The inner wall of the rotating groove is rotatably connected to a driven bevel gear disk 40. The outer surface of the composite pile steel pipe 2 is slidably connected to the inner surface of the driven bevel gear disk 40. A drive motor 41 is installed on the side wall of the drive tube 35. The output shaft of the drive motor 41 extends into the interior of the rotating groove and is fixedly connected to a drive bevel gear 42 via a coupling. The outer surface of the drive bevel gear 42 meshes with the outer surface of the driven bevel gear disk 40. The drive motor 41 controls the rotation of the drive bevel gear 42, causing the driven bevel gear disk 40 meshing with it to rotate on the inner wall of the rotating groove. Thus, the individual spiral drill rods 31 in the ring array can be converged or dispersed under linkage.

[0060] In order to drive the single auger drill rod 31 to converge or disperse under the rotation of the driven bevel gear disk 40, a rotating rod 43 is fixedly connected to the lower surface of the driven bevel gear disk 40. The lower surface of the drive tube 35 has slots 44 arranged in a ring array. The inward-facing end of the slot 44 is fixedly connected to the interior of the rotating groove. A toothed rod 45 with a toothed upper surface is slidably engaged with the inner wall of the slot 44. The inner surface of the toothed rod 45 is slidably engaged with the outer surface of the rotating rod 43. The upper surface of the single auger drill rod 31 is engaged with the toothed rod 45. The lower surface is fixedly connected, and the driven bevel gear disk 40 rotates with the rotation of the driving bevel gear 42, which in turn drives the rotating rod 43 to rotate. This causes the toothed rod 45, which is engaged on the outer surface, to move along the trajectory of the rotating rod 43 towards or away from the center of the driven bevel gear disk 40. When the toothed rod 45 moves towards the center of the driven bevel gear disk 40, the four individual spiral drill rods 31 can be gathered and merged into a complete drilling spiral rod. Then, the drilling spiral rod can be rotated under the rotation of the drive tube 35 to break the rock layer at the marked point.

[0061] By setting up the drilling mechanism 3, the drilling mechanism 3 and the guide frame 1 can be designed as an integral part, so that it can accurately drill holes at the marked points and break through the surface rock layer during the driving of the composite pile steel pipe 2. During the adjustment process, the driven bevel gear disk 40 rotates with the rotation of the active bevel gear 42, which in turn drives the rotating rod 43 to rotate. This causes the toothed rod 45, which is engaged on the outer surface, to move along the trajectory of the rotating rod 43 towards the center of the driven bevel gear disk 40. This allows the four individual spiral drill rods 31 to converge and merge into a complete drilling spiral rod. Then, under the rotation of the drive tube 35, the drilling spiral rod can rotate to break through the rock layer at the marked point, thereby reducing the frictional resistance between the composite pile steel pipe 2 and the inner side of the soil, making it easier to drive.

[0062] like Figures 13-14 As shown, the vibratory sinking mechanism 5 clamps the upper outer surface of the composite pile steel pipe 2 and causes it to sink through impact and vibration. The vibratory sinking mechanism 5 includes a vibratory motor 51.

[0063] In order to clamp the composite pile steel pipe 2 and facilitate the vibration of its upper surface to make it sink, the vibration sinking mechanism 5 includes a support ring pipe 52 that is movably sleeved on the outer surface of the upper end of the composite pile steel pipe 2. The vibration motor 51 is fixedly installed on one side of the outer surface of the support ring pipe 52. The outer surface of the support ring pipe 52 is fixedly connected with clamping cylinders 53 in a ring array. The outer surface of the piston rod of the clamping cylinder 53 extends to the inner surface of the support ring pipe 52 and is fixedly connected with a clamping ring 54. The inner surface of the clamping ring 54 is made of rubber. The inner surface of the clamping ring 54 slides in contact with the outer surface of the composite pile steel pipe 2. By the action of the clamping cylinder 53, the clamping ring 54 can be used to clamp the outer surface of the composite pile steel pipe 2.

[0064] To achieve the vibration driving of the composite pile steel pipe 2, mounting blocks 55 are fixedly installed on the outer surface of the support ring pipe 52 at uniform intervals. Hydraulic jacks 56 are installed on the surface of the mounting blocks 55. A vibratory hammer 57 is fixedly connected to the upper surface of the piston rod of the hydraulic jack 56. The lower surface of the vibratory hammer 57 is fixedly connected to the upper surface of the composite pile steel pipe 2. Thus, the vibratory hammer 57 is lifted upward by the hydraulic jacks 56 on the mounting blocks 55 and then released, so that the vibratory hammer 57 can impact the upper surface of the composite pile steel pipe 2 and make it sink. In order to improve the sinking efficiency of the composite pile steel pipe 2, the vibration motor 51 on the outer surface of the support ring pipe 52 is activated when impacting the composite pile steel pipe 2, so that the composite pile steel pipe 2 vibrates during the impact sinking process and increases its sinking rate.

[0065] like Figures 8-12 As shown, the guide frame 1 has a cylindrical hole through its middle surface. The propulsion mechanism 6 is located inside the cylindrical hole and moves up and down on its inner wall to push the clamped composite pile steel pipe 2 downward. The propulsion mechanism 6 includes a clamping tube 61 that is symmetrically distributed up and down and has grooves on its inner wall.

[0066] To enable the guide frame 1 to guide the sinking composite pile steel pipe 2, the propulsion mechanism 6 also includes pulleys 62 symmetrically distributed on the outer surface of the clamping pipe 61. The inner wall of the cylindrical hole of the guide frame 1 is symmetrically provided with sliding grooves 63. The outer surface of the pulleys 62 is slidably connected to the inner wall of the sliding grooves 63. Guide wheels 64 are mounted on opposite sides of the two clamping pipes 61 in a circular array via support ears. The outer surface of the guide wheels 64 slides in contact with the outer surface of the composite pile steel pipe 2. The composite pile steel pipe 2 is inserted into the guide... The inner surfaces of the two clamping tubes 61 inside the guide frame 1 are guided and limited by guide wheels 64. In order to facilitate better pile driving by advancing the composite pile steel pipe 2, the inner walls of the upper and lower ends of the cylindrical hole of the guide frame 1 are fixedly connected with limiting rings 65 with guide wheels 64 on their surfaces. The two clamping tubes 61 alternately move up and down on the inner wall of the cylindrical hole of the guide frame 1 to clamp the composite pile steel pipe 2, and the two limiting rings 65 can limit the movement distance of the two clamping tubes 61 inside the guide frame 1.

[0067] To facilitate the clamping and feeding of the composite pile steel pipe 2 by clamping the clamping pipe 61 within the guide frame 1 during its telescopic movement, the propulsion mechanism 6 includes elastic clamping plates 66 fixedly installed in a circular array on the inner wall of the groove of the clamping pipe 61. The other ends of the multiple elastic clamping plates 66 are tapered. A rubber balloon 67 is fixedly connected to the inner surface of the elastic clamping plates 66, and the outer surface of the rubber balloon 67 slides in contact with the outer surface of the composite pile steel pipe 2. A fixing ring 68 is movably sleeved on the outer surface of the elastic clamping plates 66. The outer surface of the fixing ring 68 slides in contact with the inner wall of the groove of the clamping pipe 61 through a key and keyway. A pushing cylinder 69 is fixedly connected to the inner top wall of the clamping pipe 61. The outer surface of the piston rod of the pushing cylinder 69 is fixedly connected to one side surface of the fixing ring 68. When the composite pile steel pipe 2 is inserted into the clamping pipe 61, it impacts downwards. The composite pile steel pipe 2 is clamped and moved by the upper clamping pipe 61. The jacking cylinder 69 is activated to push the fixing ring 68 to move, thereby retracting the conical elastic clamping plate 66. During the retraction process, the rubber balloon 67 on the inner surface squeezes the outer surface of the composite pile steel pipe 2 to achieve clamping. As the composite pile steel pipe 2 sinks due to impact, the upper clamping pipe 61 clamps the composite pile steel pipe 2 and moves downward within the guide frame 1, while the lower clamping pipe 61 loosens its clamping of the composite pile steel pipe 2 and moves upward. In order to achieve the segmented sinking of the composite pile steel pipe 2, a return spring 70 is fixedly connected to one side surface of the limiting ring 65. The free end of the return spring 70 is fixedly connected to one side outer surface of the clamping pipe 61. The return spring 70 causes the two clamping pipes 61 to reciprocate to achieve the pushing action.

[0068] After one impact, the vibratory hammer 57 resets to prepare for the second impact, but the vibratory motor 51 keeps the composite pile steel pipe 2 vibrating, causing it to sink due to vibration. To prevent the composite pile steel pipe 2 from rebounding due to the impact of the vibratory hammer 57, and to simultaneously clamp the sinking composite pile steel pipe 2, the propulsion mechanism 6 also includes a reduction motor 71 mounted on the outer surface of the guide frame 1 via a connecting block. The outer surface of the output shaft of the reduction motor 71 is fixedly connected to a pulley 72 via a coupling. A discontinuous reciprocating belt 73 is rotatably sleeved on the outer surface of the pulley 72. The higher end face of the reciprocating belt 73 penetrates the upper surface of the upper limiting ring 65 and is fixedly connected to the upper surface of the upper clamping pipe 61. A movable groove with a cylindrical hole inside is opened through one side surface of the frame 1. A movable rod 75 is fixedly connected to one side surface of the lower end of the clamping tube 61. The outer surface of the movable rod 75 is slidably engaged with the inner wall of the movable groove. The lower end face of the reciprocating belt 73 is fixedly connected to the upper surface of the movable rod 75. Thus, as the vibrating hammer 57 is reset, the upper end of the clamping tube 61 is reset, and the elastic clamping plate 66 inside the lower end of the clamping tube 61 clamps and pushes the composite pile steel pipe 2 downward. To achieve this action, the belt pulley 72 is controlled by the reduction motor 71 to reciprocate, so that the reciprocating belt 73 on its outer surface can drive the two clamping tubes 61 to move relative to each other and achieve the clamping and feeding of the composite pile steel pipe 2.

[0069] By setting the propulsion mechanism 6, the composite pile steel pipe 2 can be clamped downward. During the adjustment process, as the composite pile steel pipe 2 sinks due to impact, the upper clamping pipe 61 clamps the composite pile steel pipe 2 and moves downward within the guide frame 1, while the lower clamping pipe 61 loosens its grip on the composite pile steel pipe 2 and moves upward. This can prevent the composite pile steel pipe 2 from shaking and rebounding due to impact. The propulsion mechanism 6 clamps and propels the composite pile steel pipe 2 as it sinks due to impact, thereby improving its driving efficiency.

[0070] Working principle: such as Figures 1-14 As shown, in a specific embodiment of the present invention, the vibratory hammer 57 and the support ring pipe 52, which are connected as a whole, are suspended by a crane, and the vertical composite pile steel pipe 2 is inserted into the inner surface of the support ring pipe 52. The clamping cylinder 53 on the outer surface is activated, so that the clamping ring 54 can hold the outer surface of the composite pile steel pipe 2 tightly.

[0071] Then, the crane inserts the tightly clamped composite pile steel pipe 2 into the inner surface of the clamping pipe 61 in the guide frame 1 through the support ring pipe 52. During the insertion process, the guide wheel 64 guides and positions the descending composite pile steel pipe 2 so that the composite pile steel pipe 2 can be inserted vertically at the marked point. The composite pile steel pipe 2 is hoisted to the guide frame 1 and suspended about 1m above the ground. The total station is used for measurement and fine adjustment, and the ground is inspected.

[0072] When a hard rock layer is detected on the ground, the cylinder 32 is activated to push the support base plate 33 downward so that the single spiral drill rod 31 contacts the ground. Then, the drive motor 41 controls the active bevel gear 42 to rotate, so that the driven bevel gear disk 40 meshing with it rotates on the inner wall of the rotating groove, thereby driving the rotating rod 43 to rotate. This causes the toothed rod 45, which is engaged on the outer surface, to move along the trajectory of the rotating rod 43 toward the center of the driven bevel gear disk 40, so that the four single spiral drill rods 31 can be gathered together to form a complete drilling spiral rod.

[0073] Next, the drilling motor 37 is started, which controls the drive gear 38 to rotate. Under the meshing of the ring gear 36, the drive tube 35 and the single spiral drill rod 31 on its lower surface rotate, thereby breaking the rock surface. After drilling is completed, the gathered single spiral drill rod 31 is dispersed and reset, and the cylinder 32 is pushed to drive the drive tube 35 to reset.

[0074] Then the crane transports the suspended composite pile steel pipe 2 to the inner bottom wall of the borehole. The hydraulic jack 56 on the mounting block 55 lifts the vibratory hammer 57 upward and then releases it. This allows the vibratory hammer 57 to impact the upper surface of the composite pile steel pipe 2 and cause it to sink. At the same time, the vibration motor 51 supporting the outer surface of the ring pipe 52 operates, causing the composite pile steel pipe 2 to vibrate during the impact sinking process, thereby increasing its sinking rate.

[0075] When the vibratory hammer 57 impacts the composite pile steel pipe 2, the jacking cylinder 69 inside the upper end clamping pipe 61 is activated, causing it to push the fixing ring 68 to move, thereby retracting the cone-shaped elastic clamping plate 66. During the retraction process, the rubber balloon 67 on the inner surface squeezes the outer surface of the composite pile steel pipe 2 to achieve clamping. Furthermore, with the release of the reduction motor 71, the high end of the reciprocating belt 73 drives the upper end clamping pipe 61 downward, while the lower end clamping pipe 61 loosens its clamping of the composite pile steel pipe 2 and moves upward relative to it.

[0076] As the vibratory hammer 57 resets, the upper clamping tube 61 is loosened and reset upwards, while the elastic clamping plate 66 inside the lower clamping tube 61 clamps and pushes the composite pile steel pipe 2 downwards. With the continuous impact of the vibratory hammer 57, the two clamping tubes 61 move up and down alternately to advance the sinking composite pile steel pipe 2, making its sinking effect better.

[0077] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for driving composite steel pipe piles, characterized in that: The method for driving composite piles includes: Determine design parameters: Based on the project requirements and geological conditions, determine the design parameters of the composite steel pipe pile, including pile length, pile diameter, steel pipe material and thickness; Prepare construction equipment: After the support bridge and drilling platform are erected, use a crane to install the sunken guide frame (1) on the support bridge platform. The guide frame (1) is designed with steel sections. Lay out the position of the guide frame (1) at the top load-bearing beam of the steel pipe pile of the drilling platform and mark it. The guide frame (1) is supported and installed to the marked position of the load-bearing beam and welded firmly. Positioning of composite pile steel pipe (2): After the guide frame (1) is firmly welded, the bottom section of composite pile steel pipe (2) is hoisted to the guide frame (1) and suspended 1m above the ground. The initial positioning is made by measuring and setting out the layout points at the top of the guide frame (1) platform, and then fine-tuned by measuring with a total station. Piling preparation: Select the location of the first pile at the construction site and use the drilling mechanism (3) on the lower surface of the guide frame (1) to excavate the foundation pit; Composite pile steel pipe (2) Vibration and sinking: The prefabricated composite pile steel pipe (2) is pushed down section by section using the propulsion mechanism (6) on the guide frame (1), and the composite pile steel pipe (2) is inserted into the ground using the vibration and sinking mechanism (5) until the designed pile length is reached; The guide frame (1) has a cylindrical hole through its middle surface. The propulsion mechanism (6) is located inside the cylindrical hole and moves up and down on its inner wall to push the composite pile steel pipe (2) it clamps downward. The propulsion mechanism (6) includes a clamping tube (61) that is symmetrically distributed up and down and has a groove on its inner wall. The drilling mechanism (3) is connected to the lower surface of the guide frame (1) and extends and rotates downward to excavate the foundation pit on the ground. The drilling mechanism (3) includes single spiral drill rods (31) arranged in a ring array and converged. The vibratory sinking mechanism (5) clamps the upper outer surface of the composite pile steel pipe (2) and sinks it by impact and vibration. The vibratory sinking mechanism (5) includes a vibratory motor (51). The drilling mechanism (3) also includes a push cylinder (32) that is obliquely symmetrically distributed and fixedly connected to the lower surface of the bottom plate of the guide frame (1). The piston rod of the push cylinder (32) is fixedly connected to a support base plate (33) with a mounting hole through the middle surface. The inner wall of the mounting hole of the support base plate (33) is rotatably connected to a rotating bearing (34). The inner surface of the inner ring of the rotating bearing (34) is fixedly connected to a drive tube (35). The drilling mechanism (3) further includes a rotating groove formed inside the drive tube (35). A driven bevel gear disk (40) is rotatably connected to the inner wall of the rotating groove. The outer surface of the composite pile steel pipe (2) is slidably connected to the inner surface of the driven bevel gear disk (40). A drive motor (41) is installed on the side wall of the drive tube (35). The output shaft of the drive motor (41) extends into the interior of the rotating groove and is fixedly connected to a driving bevel gear (42) via a coupling. The outer surface of the driving bevel gear (42) is connected to the outer surface of the driven bevel gear disk (40). Meshing; a rotating rod (43) is fixedly connected to the lower surface of the driven bevel gear disk (40), and a slot (44) is provided in a ring array on the lower surface of the drive tube (35). The inward end of the slot (44) is fixedly connected to the interior of the rotating groove. A toothed rod (45) with a toothed groove on its upper surface is slidably engaged with the inner wall of the slot (44). The inner surface of the toothed groove of the toothed rod (45) is slidably engaged with the outer surface of the rotating rod (43). The upper surface of the single spiral drill rod (31) is fixedly connected to the lower surface of the toothed rod (45). The propulsion mechanism (6) also includes pulleys (62) symmetrically distributed on the outer surface of the tube (61). The inner wall of the cylindrical hole of the guide frame (1) is provided with grooves (63) symmetrically distributed. The outer surface of the pulley (62) is slidably connected to the inner wall of the groove (63). The opposite side surfaces of the two tubes (61) are arranged in a ring array and are equipped with guide wheels (64) through the support ear plate. The outer surface of the guide wheel (64) is in sliding contact with the outer surface of the composite pile steel pipe (2). The inner side walls of the upper and lower ends of the cylindrical hole of the guide frame (1) are fixedly connected with limiting rings (65) with the guide wheels (64) on their surfaces.

2. The method for driving a combined steel pipe composite pile according to claim 1, characterized in that: The drilling mechanism (3) also includes a ring gear (36) fixedly sleeved on the outer surface of the drive tube (35), a drilling motor (37) fixedly connected to the lower surface of the support base plate (33), and a drive gear (38) fixedly connected to the outer surface of the output shaft of the drilling motor (37) through a coupling, and the outer surface of the drive gear (38) meshes with the outer surface of the ring gear (36).

3. The method for driving a combined steel pipe composite pile according to claim 2, characterized in that: The vibratory sinking mechanism (5) includes a support ring tube (52) movably sleeved on the outer surface of the upper end of the composite pile steel pipe (2). The vibration motor (51) is fixedly installed on one side of the outer surface of the support ring tube (52). The outer surface of the support ring tube (52) is fixedly connected with clamping cylinders (53) in a ring array. The outer surface of the piston rod of the clamping cylinder (53) extends to the inner surface of the support ring tube (52) and is fixedly connected with a clamping ring (54). The inner surface of the clamping ring (54) is made of rubber. The inner surface of the clamping ring (54) slides in contact with the outer surface of the composite pile steel pipe (2). The outer surface of the support ring tube (52) is fixedly installed with mounting blocks (55) evenly spaced. The surface of the mounting blocks (55) is equipped with hydraulic jacks (56). The upper surface of the piston rod of the hydraulic jack (56) is fixedly connected with a vibratory hammer (57). The lower surface of the vibratory hammer (57) is fixedly connected to the upper surface of the composite pile steel pipe (2).

4. The method for driving a combined steel pipe composite pile according to claim 3, characterized in that: The propulsion mechanism (6) includes elastic clamps (66) fixedly installed in a ring array on the inner wall of the groove of the tube (61). The other end of the multiple elastic clamps (66) is tapered. A rubber balloon (67) is fixedly connected to the inner surface of the elastic clamp (66). The outer surface of the rubber balloon (67) slides in contact with the outer surface of the composite pile steel pipe (2). A fixing ring (68) is movably sleeved on the outer surface of the elastic clamp (66). The outer surface of the fixing ring (68) slides in contact with the inner wall of the groove of the tube (61) through the cooperation of a key and a keyway. A push cylinder (69) is fixedly connected to the inner top wall of the tube (61). The outer surface of the piston rod of the push cylinder (69) is fixedly connected to one side surface of the fixing ring (68). A return spring (70) is fixedly connected to one side surface of the limiting ring (65). The free end of the return spring (70) is fixedly connected to one side outer surface of the tube (61).

5. The method for driving a combined steel pipe composite pile according to claim 4, characterized in that: The propulsion mechanism (6) also includes a geared motor (71) mounted on the outer surface of the guide frame (1) via a connecting block. The outer surface of the output shaft of the geared motor (71) is fixedly connected to a pulley (72) via a coupling. The outer surface of the pulley (72) is rotatably sleeved with a discontinuous reciprocating belt (73). The high end face of the reciprocating belt (73) passes through the upper surface of the upper limit ring (65) and is fixedly connected to the upper surface of the upper clamping tube (61). A moving groove is opened through one side surface of the guide frame (1) to connect to the cylindrical hole inside. A moving rod (75) is fixedly connected to one side surface of the lower clamping tube (61). The outer surface of the moving rod (75) is slidably engaged with the inner wall of the moving groove. The low end face of the reciprocating belt (73) is fixedly connected to the upper surface of the moving rod (75).

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