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

Abstract

The invention discloses an auxiliary device and method for quickly lowering a steel pipe pile in a hard rock stratum, and the auxiliary device comprises a plurality of supporting shoes which are symmetrically arranged on the inner wall of the steel pipe pile relative to the center of the steel pipe pile; the supporting platform is detachably arranged on the supporting boot; the horizontal rotating device is arranged on the supporting platform, the output end of the horizontal rotating device and the supporting platform are coaxially arranged, and the output end of the horizontal rotating device is located below the supporting platform; the vertical rotating device is fixedly connected with the output end of the horizontal rotating device; the output end of the vertical rotating device is connected with a telescopic rod, and the end, away from the vertical rotating device, of the telescopic rod is rotationally connected with a hob head. And the slurry treatment box is arranged on the ground outside the pile hole, an inlet of the slurry treatment box is connected with a slurry pipeline, and the other end of the slurry pipeline extends to the position near the hob head along the telescopic rod. The method can assist the steel pipe pile to rapidly sink in place, and effectively improves the sinking efficiency of the steel pipe pile in a hard rock stratum.

Description

Technical Field

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

[0002] Generally, large-diameter pile foundations are often used for anchor foundations of large bridges in areas with good geological conditions, or this type of structure is often used for the pile foundations at the bottom of the bridge pier. At this time, the pile foundation is often drilled by rotary drilling or impact drilling during construction. After the drilling is completed, the steel pipe pile is hoisted into the slot by a crawler crane or a car crane, and finally the concrete is poured to form the pile. The construction effect of the above-mentioned pile drilling process can be guaranteed in the face of soft soil and strongly weathered rock formations, but when encountering hard rock formations, the use of the above-mentioned construction equipment has slow construction efficiency, large wear and tear on the drill bit, and high cost. At the same time, when large-diameter piles (≥3.5m) are drilled, a rotary drilling rig with greater torque is required, and the equipment investment is large. In view of the problems of large equipment investment, slow punching efficiency, and severe equipment wear in the drilling process of large-diameter piles in hard rock formations, there is an urgent need for a drilling and sinking aid device for hard rock formations to solve the technical problem of large-diameter steel pipe piles sinking in hard rock formations. 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 purposes and other advantages according to the present invention, a steel pipe pile rapid lowering auxiliary device for hard rock formations is provided, comprising: A plurality of grippers, wherein the plurality of grippers are 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 support shoe; A horizontal rotating device, which is arranged on the supporting platform, wherein the output end of the horizontal rotating device is coaxially arranged with the supporting platform and the output end is located below the supporting platform; A vertical rotating device, which is fixedly connected to the output end of the horizontal rotating device; the output end of the vertical rotating device is connected to a telescopic rod, and one end of the telescopic rod away from the vertical rotating device is rotatably connected to a hob head; 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.

[0005] Preferably, it further comprises a ground controller connected with the horizontal rotating device, the vertical rotating device and the mud processing box.

[0006] Preferably, the horizontal rotation device includes a central rotating shaft and a first driving device, a central hole is opened at the center of the support platform, the central rotating shaft is vertically passed through the central hole, and the first driving device is fixedly disposed on the support platform to drive the central rotating shaft to rotate.

[0007] Preferably, the vertical rotating 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 disposed on the central rotating shaft to drive the rotating shaft to rotate.

[0008] Preferably, one end of the telescopic rod is fixedly connected to the rotating shaft.

[0009] 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 roller cutter head.

[0010] Preferably, a third driving device on the right is provided on the telescopic rod to drive the telescopic rod to extend and retract.

[0011] Preferably, a stone baffle is fixedly provided at the end of the telescopic rod corresponding to the bottom of the roller cutter head.

[0012] 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: S1, installing each of the support shoes on the inner wall of the first section of the steel pipe pile, then assembling the steel pipe pile rapid lowering auxiliary device, and connecting the support platform with the support shoes; S2, lowering the steel pipe pile to a certain depth in the soil layer, adjusting the inclination angle and length of the telescopic rod, so that the roller cutter head abuts against the soil layer at the bottom of the steel pipe pile; S3, start the horizontal rotation device to drive the roller cutter head to start cutting until the roller cutter head completes one circle of cutting; adjust the inclination angle and length of the telescopic rod to make the roller cutter head complete a second circle of cutting; repeat the above process until the roller cutter head completes cutting of one layer of soil; S4. Repeat step S3 until the steel pipe pile is lowered to a predetermined depth.

[0013] The present invention has at least the following beneficial effects: The steel pipe pile rapid lowering auxiliary device for hard rock formations provided by the present invention cuts soil and rock formations through a roller cutter head, and the position of the roller cutter head can be adjusted through a horizontal steering device, a vertical steering device and a telescopic rod, so that the roller cutter head can perform all-round soil and rock cutting at the bottom of the steel pipe pile, and during 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.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the auxiliary device for rapidly lowering steel pipe piles for hard rock formations according to the present invention; Figure 2 This is a schematic diagram of the bottom structure of the support platform of the present invention; Figure 3 It is a schematic diagram of the arrangement positions of the mud processing box and the ground controller of the present invention; Figure 4 It is a cross-sectional view of the steel pipe pile rapid lowering auxiliary device for hard rock formations of the present invention when cutting in the formation; Figure 5 The figure is a schematic diagram of the structure of the stone baffle of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] 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 "lateral", "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 on the present invention.

[0018] like Figures 1 to 5 As shown, the present invention provides a steel pipe pile rapid lowering auxiliary device for hard rock formations, comprising: 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; A supporting platform 2, which is detachably arranged on the gripper shoe 1; A horizontal rotating device, which is arranged on the supporting platform 2, wherein the output end of the horizontal rotating device is coaxially arranged with the supporting platform 2, and the output end thereof is located below the supporting platform 2; A vertical rotating device, which is fixedly connected to the output end of the horizontal rotating device; the output end of the vertical rotating device is connected to a telescopic rod 5, and one end of the telescopic rod 5 away from the vertical rotating device is rotatably connected to a hob head 6; A mud treatment box 9 is arranged 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.

[0019] In this technical solution, each of the support shoes 1 is first fixed on 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 roller cutter head 6 to make circular motion in the horizontal plane, so that the roller 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 roller cutter head 6 to rotate in the vertical plane to adjust the pitch angle of the two. In combination with adjusting the length of the telescopic rod 5, it can adapt to pile holes of different diameters, so that the roller cutter head 6 can abut against the inner wall of the pile hole for cutting. During the process of lowering the steel pipe pile 11, if the lowering is blocked, the cutter head 6 can be used to cut the hard rock formation on the inner wall of the pile hole to assist the steel pipe pile 11 in sinking and improve the lowering efficiency of the steel pipe pile 11 in the hard rock formation. During the cutting process of the cutter head 6, the soil and rock particles cut down are sucked into the mud treatment box 9 through the mud pipeline 4 together with the mud. A mud pump is arranged in the mud treatment box 9.

[0020] In another technical solution, Figure 3 As shown, the auxiliary device also 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 adopt a controller device conventionally used in the art, and the 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 on the ground.

[0021] In another technical solution, the horizontal rotation device includes a central rotating shaft 3 and a first driving device. A central hole is opened at the center of the support platform 2, and the central rotating shaft 3 is vertically inserted into the central hole. The first driving device is fixedly arranged on the support platform 2 to drive the central rotating shaft 3 to rotate. The first driving device is connected to the ground controller, and the central rotating shaft 3 is coaxially arranged with the central hole; preferably, the first driving device can select a servo motor, and the output end of the motor drives the central rotating shaft 3 to rotate directly or through a transmission structure.

[0022] In another technical solution, the vertical rotation device includes a rotating shaft 8 and a second driving device, the rotating shaft 8 is rotatably connected to one end of the central rotating shaft 3 located below the supporting platform 2, and the second driving device is fixedly arranged on the central rotating shaft 3 to drive the rotating shaft 8 to rotate. The second driving device is connected to the ground controller, and a servo motor can be selected. The output end of the motor drives the rotating shaft 8 to rotate, thereby driving the telescopic rod 5 and the hob head 6 to adjust the tilt angle.

[0023] 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.

[0024] 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, the end of the mud pipeline 4 can be as close to the roller cutter head 6 as possible without interfering with the cutting operation of the roller cutter head 6.

[0025] In another technical solution, a third right driving device 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 may adopt a hydraulic telescopic rod 7.

[0026] 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 5 As shown, the stone baffle 12 can prevent rock blocks from entering between the roller cutter head 6 and the telescopic rod 5 and causing jamming when the roller cutter head 6 is cutting hard rock formations.

[0027] The present invention also provides a method for quickly lowering a steel pipe pile for a hard rock formation, using the auxiliary device for quickly lowering a steel pipe pile for a hard rock formation, comprising the following steps: S1, installing each of the grippers 1 on the inner wall of the first section of the steel pipe pile 11, then assembling the steel pipe pile rapid lowering auxiliary device, and connecting the support platform 2 with the grippers 1; 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 hob head 6 abuts against the soil layer at the bottom of the steel pipe pile; 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; S4, repeat step S3 until the steel pipe pile 11 is lowered to a predetermined depth.

[0028] 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 roller cutter head 6 can be to cut from the bottom of the pile hole from the outside to the inside with a gradually decreasing radius, or it can be to cut from the center to the outside with a gradually increasing radius; after the roller cutter head 6 completes cutting of a layer of soil, the steel pipe pile 11 can sink to a certain height accordingly; in step S4, in the process of repeating step S3, the steel pipe pile 11 is also included in the process of extending.

[0029] 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 modes, and 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. A steel pipe pile rapid lowering auxiliary device for hard rock formations, characterized in that: include: A plurality of grippers, wherein the plurality of grippers are 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 support shoe; A horizontal rotating device, which is arranged on the supporting platform, wherein the output end of the horizontal rotating device is coaxially arranged with the supporting platform and the output end is located below the supporting platform; A vertical rotating device, which is fixedly connected to the output end of the horizontal rotating device; the output end of the vertical rotating device is connected to a telescopic rod, and one end of the telescopic rod away from the vertical rotating device is rotatably connected to a hob head; 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.

2. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 1, characterized in that: It also includes a ground controller connected with the horizontal rotating device, the vertical rotating device and the mud processing box.

3. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 1, characterized in that: The horizontal rotation device includes a central rotating shaft and a first driving device. A central hole is opened at the center of the support platform, and the central rotating shaft vertically passes through the central hole. The first driving device is fixedly arranged on the support platform to drive the central rotating shaft to rotate.

4. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 3, characterized in that: The vertical rotating 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. The second driving device is fixedly arranged on the central rotating shaft to drive the rotating shaft to rotate.

5. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 4, characterized in that: One end of the telescopic rod is fixedly connected to the rotating shaft.

6. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 5, characterized in that: 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 roller cutter head.

7. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 1, characterized in that: The telescopic rod is provided with a third driving device on the right side for driving the telescopic rod to extend and retract.

8. The steel pipe pile rapid lowering auxiliary device for hard rock formations according to claim 1, characterized in that: A stone baffle is fixedly arranged at the end of the telescopic rod corresponding to the bottom of the roller cutter head.

9. A method for rapidly lowering a steel pipe pile in a hard rock formation, using the auxiliary device for rapidly lowering a steel pipe pile in a hard rock formation as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1, installing each of the support shoes on the inner wall of the first section of the steel pipe pile, then assembling the steel pipe pile rapid lowering auxiliary device, and connecting the support platform with the support shoes; S2, lowering the steel pipe pile to a certain depth in the soil layer, adjusting the inclination angle and length of the telescopic rod, so that the roller cutter head abuts against the soil layer at the bottom of the steel pipe pile; S3, start the horizontal rotation device to drive the roller cutter head to start cutting until the roller cutter head completes one circle of cutting; adjust the inclination angle and length of the telescopic rod to make the roller cutter head complete a second circle of cutting; repeat the above process until the roller cutter head completes cutting of one layer of soil; S4. Repeat step S3 until the steel pipe pile is lowered to a predetermined depth.

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