A steel pipe pile rapid lowering auxiliary device and method for hard rock stratum

Abstract

The application discloses a kind of steel pipe pile quick drop auxiliary device and method for hard rock stratum, auxiliary device includes: multiple support boots, multiple support boots are symmetrically arranged on the inner wall of steel pipe pile about the center of steel pipe pile;Support platform is detachably arranged on support boot;Horizontal rotating device is arranged on support platform, the output end of horizontal rotating device is coaxially arranged with support platform, and its output end is below support platform;Vertical rotating device is fixedly connected with the output end of horizontal rotating device;The output end of vertical rotating device is connected with telescopic rod, and the end of telescopic rod away from vertical rotating device is rotatably connected with cutter head;Mud treatment box is arranged on the ground outside pile hole, the inlet of mud treatment box is connected with mud pipeline, and the other end of mud pipeline extends to the vicinity of cutter head along telescopic rod.The application can help steel pipe pile to sink in place quickly, effectively improve the sinking efficiency of steel pipe pile in hard rock stratum.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe pile construction, and more particularly to a device and method for quickly lowering steel pipe piles in hard rock formations. Background Art

[0002] Large-diameter pile foundations are commonly used for anchorage foundations of large bridges in areas with favorable geological conditions, or for pile foundations beneath bridge piers. Pile foundations are typically constructed using rotary drilling or percussion drilling. After drilling, steel pipe piles are hoisted into slots using crawler cranes or truck cranes, and finally, concrete is poured to complete the piles. While these pile drilling techniques ensure effective construction in soft soil and strongly weathered rock formations, they suffer from slow efficiency, significant wear and tear on the drill bit, and high costs when constructing in hard rock formations. Furthermore, when drilling large-diameter piles (≥3.5m), a rotary drilling rig with greater torque is required, resulting in significant equipment investment. Given the significant equipment investment, slow drilling efficiency, and severe equipment wear associated with drilling large-diameter piles in hard rock formations, a drilling aid for sinking large-diameter steel pipe piles in hard rock formations is urgently needed. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] In order to achieve these objects and other advantages according to the present invention, a device for quickly lowering a steel pipe pile in a hard rock formation is provided, comprising:

[0005] a plurality of grippers, the plurality of grippers being symmetrically arranged on the inner wall of the steel pipe pile about the center of the steel pipe pile;

[0006] a supporting platform detachably disposed on the gripper shoe;

[0007] a horizontal rotation device, which is arranged on the support platform, wherein the output end of the horizontal rotation device is coaxially arranged with the support platform and the output end is located below the support platform;

[0008] A vertical rotation device is fixedly connected to the output end of the horizontal rotation device; the output end of the vertical rotation device is connected to a telescopic rod, and the end of the telescopic rod away from the vertical rotation device is rotatably connected to a hob head;

[0009] A mud treatment box is arranged on the ground outside the pile hole. The inlet of the mud treatment box is connected to a mud pipeline. The other end of the mud pipeline extends along the telescopic rod to the vicinity of the roller cutter head. The mud treatment box is used to suck out the mud near the roller cutter head through the mud pipeline.

[0010] Preferably, the system further comprises a ground controller connected to the horizontal rotation device, the vertical rotation device and the mud processing box.

[0011] Preferably, the horizontal rotation device includes a central shaft and a first driving device, a central hole is opened in the center of the support platform, the central shaft is vertically passed through the central hole, and the first driving device is fixedly arranged on the support platform to drive the central shaft to rotate.

[0012] Preferably, the vertical rotation device includes a rotating shaft and a second driving device, the rotating shaft is rotatably connected to one end of the central rotating shaft located below the support platform, and the second driving device is fixedly arranged on the central rotating shaft to drive the rotating shaft to rotate.

[0013] Preferably, one end of the telescopic rod is fixedly connected to the rotating shaft.

[0014] Preferably, the central rotating shaft and the telescopic rod are both hollow structures, and the mud pipeline passes through the central rotating shaft and the telescopic rod in sequence and then extends to the vicinity of the cutter head.

[0015] Preferably, a third driving device on the right side is provided on the telescopic rod to drive the telescopic rod to extend and retract.

[0016] Preferably, a stone baffle is fixedly provided at the end of the telescopic rod corresponding to the bottom of the hob head.

[0017] Another object of the present invention is to provide a method for quickly lowering steel pipe piles for hard rock formations, using the auxiliary device for quickly lowering steel pipe piles for hard rock formations, comprising the following steps:

[0018] S1. Install the grippers on the inner wall of the first section of the steel pipe pile, then assemble the steel pipe pile rapid lowering auxiliary device, and connect the support platform to the grippers;

[0019] S2. Lower the steel pipe pile to a certain depth in the soil layer, and adjust the inclination angle and length of the telescopic rod so that the cutter head contacts the soil layer at the bottom of the steel pipe pile;

[0020] S3, starting the horizontal rotation device to drive the cutter head to start cutting until the cutter head completes one circle of cutting; adjusting the inclination angle and length of the telescopic rod to enable the cutter head to complete a second circle of cutting; repeating the above process until the cutter head completes cutting a layer of soil;

[0021] S4. Repeat step S3 until the steel pipe pile is lowered to a predetermined depth.

[0022] The present invention has at least the following beneficial effects:

[0023] The steel pipe pile rapid lowering auxiliary device for hard rock formations provided by the present invention cuts soil and rock formations through a cutter head, and the position of the cutter head can be adjusted by a horizontal steering device, a vertical steering device and a telescopic rod, so that the cutter head can perform all-round soil and rock cutting at the bottom of the steel pipe pile. In the cutting process, soil and rock particles are quickly discharged from the pile hole along with the mud through a mud pipeline and a mud treatment box, thereby helping the steel pipe pile to sink quickly into place and effectively improving the sinking efficiency of the steel pipe pile in the hard rock formation.

[0024] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of the auxiliary device for rapidly lowering steel pipe piles in hard rock formations according to the present invention;

[0026] Figure 2 This is a schematic diagram of the bottom structure of the support platform of the present invention;

[0027] Figure 3 This is a schematic diagram of the arrangement of the mud processing box and the ground controller of the present invention;

[0028] Figure 4 This is a cross-sectional view of the steel pipe pile rapid lowering auxiliary device for hard rock formations according to the present invention when cutting in the formation;

[0029] Figure 5 This is a schematic structural diagram of the stone baffle of the present invention; DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0031] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 cannot be understood as a limitation to the present invention.

[0032] like Figures 1 to 5 As shown, the present invention provides a steel pipe pile rapid lowering auxiliary device for hard rock formations, comprising:

[0033] A plurality of grippers 1, wherein the plurality of grippers 1 are symmetrically arranged on the inner wall of the steel pipe pile 11 about the center of the steel pipe pile 11;

[0034] a supporting platform 2, which is detachably mounted on the gripper shoe 1;

[0035] a horizontal rotation device, which is arranged on the support platform 2, wherein the output end of the horizontal rotation device is coaxially arranged with the support platform 2 and the output end is located below the support platform 2;

[0036] A vertical rotation device is fixedly connected to the output end of the horizontal rotation device; the output end of the vertical rotation device is connected to a telescopic rod 5, and the end of the telescopic rod 5 away from the vertical rotation device is rotatably connected to a hob head 6;

[0037] A mud treatment box 9 is provided on the ground outside the pile hole. The inlet of the mud treatment box 9 is connected to a mud pipeline 4. The other end of the mud pipeline 4 extends along the telescopic rod 5 to the vicinity of the roller cutter head 6. The mud treatment box 9 is used to suck out the mud near the roller cutter head 6 through the mud pipeline 4.

[0038] In this technical solution, each of the support shoes 1 is first fixed to the inner wall of the steel pipe column 11. After the rest of the auxiliary device is assembled, the support platform 2 is connected to the support shoe 1. Preferably, the two can be connected by fasteners. Each of the support shoes 1 jointly supports the support platform 2. The horizontal rotation device is used to drive the vertical rotation device, the telescopic rod 5 and the cutter head 6 to perform circular motion in the horizontal plane, so that the cutter head 6 can cut around the inner wall of the pile hole. The vertical rotation device is used to drive the telescopic rod 5 and the cutter head 6 to rotate in the vertical plane to adjust the pitch angle of the two. In conjunction with adjusting the length of the telescopic rod 5, it can adapt to pile holes of different diameters, so that the cutter head 6 can abut against the inner wall of the pile hole for cutting. If the pile 11 encounters any obstruction during its lowering process, the cutter head 6 can be used to cut the hard rock formation on the inner wall of the pile hole to assist the pile 11 in sinking, thereby improving the efficiency of lowering the pile 11 into the hard rock formation. During the cutting process by the cutter head 6, the soil and rock particles removed are sucked into the mud treatment tank 9 through the mud pipeline 4 along with the mud. The mud treatment tank 9 is equipped with a mud pump.

[0039] In another technical solution, Figure 3As shown, the auxiliary device further includes a ground controller 10, which is connected to the horizontal rotation device, the vertical rotation device, and the mud treatment box 9. The ground controller 10 can be a controller device conventionally used in the art, and construction personnel control the opening and closing of the horizontal rotation device, the vertical rotation device, and the mud treatment box 9 through the ground controller 10.

[0040] In another technical solution, the horizontal rotation device includes a central shaft 3 and a first drive device. The support platform 2 has a central hole, and the central shaft 3 is vertically inserted into the hole. The first drive device is fixed to the support platform 2 to drive the central shaft 3 to rotate. The first drive device is connected to the ground controller, and the central shaft 3 is coaxially arranged with the central hole. Preferably, the first drive device can be a servo motor, and the output end of the motor drives the central shaft 3 to rotate directly or through a transmission structure.

[0041] In another technical solution, the vertical rotation device includes a rotating shaft 8 and a second drive device. The rotating shaft 8 is rotatably connected to the end of the central rotating shaft 3 located below the support platform 2. The second drive device is fixed to the central rotating shaft 3 to drive the rotating shaft 8 to rotate. The second drive device is connected to the ground controller and can be a servo motor. The output end of the motor drives the rotating shaft 8 to rotate, thereby driving the telescopic rod 5 and the roller cutter head 6 to adjust the tilt angle.

[0042] In another technical solution, one end of the telescopic rod 5 is fixedly connected to the rotating shaft 8. The rotating shaft 8 drives the telescopic rod 5 to rotate.

[0043] In another technical solution, Figure 4 As shown, the central rotating shaft 3 and the telescopic rod 5 are both hollow structures. The mud pipeline 4 passes through the central rotating shaft 3 and the telescopic rod 5 in sequence and then extends to the vicinity of the roller cutter head 6 to avoid the mud pipeline 4 being exposed to the outside, thereby providing protection. At the same time, it can also make the end of the mud pipeline 4 as close to the roller cutter head 6 as possible without interfering with the cutting operation of the roller cutter head 6.

[0044] In another technical solution, a third driving device on the right side is provided on the telescopic rod 5 to drive the telescopic rod 5 to extend and retract. Figure 2 As shown, the third driving device can adopt a hydraulic telescopic rod 7.

[0045] In another technical solution, a stone baffle 12 is fixedly provided at the end of the telescopic rod 5 corresponding to the bottom of the hob head 6. Figure 5As shown, the stone baffle 12 can prevent rock blocks from entering between the cutter head 6 and the telescopic rod 5 and causing jamming when the cutter head 6 is cutting hard rock formations.

[0046] The present invention also provides a method for quickly lowering steel pipe piles for hard rock formations, using the auxiliary device for quickly lowering steel pipe piles for hard rock formations, comprising the following steps:

[0047] S1. Install each gripper shoe 1 on the inner wall of the first section of the steel pipe pile 11, then assemble the steel pipe pile rapid lowering auxiliary device, and connect the support platform 2 to the gripper shoe 1;

[0048] S2, lowering the steel pipe pile 11 to a certain depth in the soil layer, adjusting the inclination angle and length of the telescopic rod 5 so that the cutter head 6 abuts against the soil layer at the bottom of the steel pipe pile;

[0049] S3, start the horizontal rotation device to drive the roller cutter head 6 to start cutting until the roller cutter head 6 completes one circle of cutting; adjust the inclination angle and length of the telescopic rod 5 to make the roller cutter head 6 complete a second circle of cutting; repeat the above process until the roller cutter head 6 completes cutting of one layer of soil;

[0050] S4. Repeat step S3 until the steel pipe pile 11 is lowered to a predetermined depth.

[0051] In step S1, after the steel pipe pile rapid lowering auxiliary device for hard rock formations is installed, the ground controller 10 is used to test whether the device can operate normally. In step S2, a pile hole with a certain depth is pre-drilled on the ground, and after the steel pipe pile 11 is hung in the pile hole, the position of the roller cutter head 6 is adjusted to the position as shown in FIG. Figure 4 As shown; in step S3, the cutting path of the cutter head 6 can be to draw a circle from the bottom of the pile hole from the outside to the inside with a gradually decreasing radius for cutting, or to draw a circle from the center to the outside with a gradually increasing radius for cutting; after the cutter head 6 completes cutting a layer of soil, the steel pipe pile 11 can be sunk to a certain height accordingly; in step S4, while repeating step S3, the steel pipe pile 11 is also extended.

[0052] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and 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 illustrations shown and described herein.

Claims

1. A steel pipe pile rapid lowering auxiliary device for hard rock formations, characterized in that: include: a plurality of grippers, the plurality of grippers being symmetrically arranged on the inner wall of the steel pipe pile about the center of the steel pipe pile; a supporting platform detachably disposed on the gripper shoe; a horizontal rotation device, which is arranged on the support platform, wherein the output end of the horizontal rotation device is coaxially arranged with the support platform and the output end is located below the support platform; A vertical rotation device is fixedly connected to the output end of the horizontal rotation device; the output end of the vertical rotation device is connected to a telescopic rod, and the end of the telescopic rod away from the vertical rotation device is rotatably connected to a hob head; a mud treatment box disposed on the ground outside the pile hole, the inlet of the mud treatment box being connected to a mud pipeline, the other end of the mud pipeline extending along the telescopic rod to the vicinity of the roller cutter head, the mud treatment box being used to suck out the mud near the roller cutter head through the mud pipeline; It also includes a ground controller connected to the horizontal rotation device, the vertical rotation device and the mud processing box; The horizontal rotation device includes a central shaft and a first driving device. A central hole is opened in the center of the support platform, and the central shaft is vertically inserted into the central hole. The first driving device is fixedly arranged on the support platform to drive the central shaft to rotate. The vertical rotation device includes a rotating shaft and a second driving device, the rotating shaft is rotatably connected to one end of the central rotating shaft located below the supporting platform, and the second driving device is fixedly arranged on the central rotating shaft to drive the rotating shaft to rotate; One end of the telescopic rod is fixedly connected to the rotating shaft; The central rotating shaft and the telescopic rod are both hollow structures, and the mud pipeline passes through the central rotating shaft and the telescopic rod in sequence and then extends to the vicinity of the cutter head; The telescopic rod is provided with a third driving device on the right side for driving the telescopic rod to extend and retract; A stone baffle is fixedly provided at the end of the telescopic rod corresponding to the bottom of the hob head.

2. A method for rapidly lowering steel pipe piles in hard rock formations, using the auxiliary device for rapidly lowering steel pipe piles in hard rock formations according to claim 1, characterized in that: The following steps are involved: S1. Install the grippers on the inner wall of the first section of the steel pipe pile, then assemble the steel pipe pile rapid lowering auxiliary device, and connect the support platform to the grippers; S2. Lower the steel pipe pile to a certain depth in the soil layer, and adjust the inclination angle and length of the telescopic rod so that the cutter head contacts the soil layer at the bottom of the steel pipe pile; S3, starting the horizontal rotation device to drive the cutter head to start cutting until the cutter head completes one circle of cutting; adjusting the inclination angle and length of the telescopic rod to enable the cutter head to complete a second circle of cutting; repeating the above process until the cutter head completes cutting a layer of soil; S4. Repeat step S3 until the steel pipe pile is lowered to a predetermined depth.

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