Cement-soil pile construction equipment

Abstract

The present invention discloses a cement-soil pile construction device, aiming to provide a cement-soil pile construction device that can reduce manual operation, lower labor intensity, and improve the construction efficiency of tunnel reinforcement. It includes a high-pressure jet grouting pile machine, which comprises a jet grouting drill rod, a vehicle frame, a support tower rod arranged on the vehicle frame, a first guide rail arranged on the support tower rod, a sliding seat sliding along the first guide rail, a sliding seat moving actuator for driving the sliding seat, and a rotary power head arranged on the sliding seat. The jet grouting drill rod includes a drill body and a drill rod tail connected to the upper end of the drill body, and the drill body is composed of several connected drill pipes connected in sequence; a walking vehicle, on which an installation platform is provided, and the high-pressure jet grouting pile machine is installed on the installation platform through the vehicle frame; a drill pipe automatic installation device, which includes a drill pipe placement rack and a manipulator arranged on the installation platform, and the drill pipe placement rack is used for placing the connected drill pipes of the jet grouting drill rod.

Description

Technical Field

[0001] The present invention relates to a construction equipment for soil-cement piles, and more particularly to a construction equipment for soil-cement piles used for tunnel reinforcement. Background Art

[0002] At present, after the construction of a tunnel (such as a subway tunnel) is completed, it is necessary to reinforce the entire tunnel or a certain section of the tunnel to improve the structural stability of the tunnel. Currently, the general construction equipment for tunnel reinforcement uses a high-pressure jet grouting rig for construction. Specifically, the high-pressure jet grouting rig uses a jet grouting drill rod to drill holes, so that the jet grouting drill rod drills into a set depth, and then uses the jet grouting drill rod to perform high-pressure jet grouting, thereby forming high-pressure jet grouting piles in the soil layer under the tunnel to support the tunnel, so as to achieve the reinforcement of the tunnel. Since the inner diameter of the tunnel is very limited and the length of the jet grouting drill rod is much greater than the inner diameter of the tunnel, the jet grouting drill rod of the current high-pressure jet grouting rig generally consists of several sections of drill pipes connected in sequence. In specific construction, after the jet grouting drill rod drills into a specified depth each time, a section of drill pipe is added, so that the jet grouting drill rod drills into the set depth. At present, in actual construction, the installation of the drill pipes of the jet grouting drill rod of the high-pressure jet grouting rig is generally completely manually installed. Specifically, the drill pipes are manually carried and manually installed on the jet grouting drill rod. In this way, not only is the labor intensity high, but also the installation efficiency is low, which will affect the construction efficiency of tunnel reinforcement and prolong the construction period of tunnel reinforcement. In view of this, how to develop a construction equipment for soil-cement piles used for tunnel reinforcement to reduce manual operation, reduce labor intensity, and improve construction efficiency is of great significance. Summary of the Invention

[0003] The purpose of the present invention is to provide a construction equipment for soil-cement piles that can reduce manual operation, reduce labor intensity, and improve the construction efficiency of tunnel reinforcement.

[0004] The technical solution of the present invention is as follows:

[0005] A construction equipment for soil-cement piles, comprising:

[0006] A high-pressure jet grouting rig, which includes a jet grouting drill rod, a vehicle frame, a support tower rod arranged on the vehicle frame, a first guide rail arranged on the support tower rod, a sliding seat sliding along the first guide rail, a sliding seat moving actuator for driving the sliding seat, and a rotary power head arranged on the sliding seat. The jet grouting drill rod includes a drill body and a drill rod tail connected to the upper end of the drill body. The drill body consists of several sections of connecting drill pipes connected in sequence. The drill rod tail includes a tail drill pipe rotatably arranged on the sliding seat, and the rotary power head is used to drive the tail drill pipe to rotate;

[0007] A walking vehicle is provided with an installation platform, and the high-pressure jet grouting rig is installed on the installation platform through a vehicle frame. The walking vehicle is a crawler-type walking vehicle, a wheel-type walking vehicle, or a track walking vehicle suitable for walking on rails;

[0008] A drill pipe automatic installation device includes a drill pipe placement rack and a manipulator arranged on the installation platform. The drill pipe placement rack is used to place the connecting drill pipes of the jet grouting drill rods, and the manipulator is used to carry and install the connecting drill pipes on the drill pipe placement rack onto the jet grouting drill rods of the high-pressure jet grouting rig, or to remove the connecting drill pipes on the jet grouting drill rods of the high-pressure jet grouting rig and place them on the drill pipe placement rack.

[0009] During the construction of the cement-soil pile by the construction equipment of this solution, when the jet grouting drill rod of the high-pressure jet grouting rig drills into the soil layer, after the jet grouting drill rod drills into the specified depth each time, the manipulator is used to carry and install the connecting drill pipes on the drill pipe placement rack onto the jet grouting drill rod of the high-pressure jet grouting rig; after the jet grouting drill rod of the high-pressure jet grouting rig drills into the set depth of the soil layer, during the process of the jet grouting drill rod moving back, after the jet grouting drill rod moves back a specified length each time, the manipulator is used to remove the connecting drill pipes on the jet grouting drill rod of the high-pressure jet grouting rig and place them on the drill pipe placement rack; thus, during the construction of the high-pressure jet grouting pile, there is no need for manual handling to install or disassemble the connecting drill pipes of the jet grouting drill rod, so as to reduce manual operation, lower labor intensity, and improve the construction efficiency of tunnel reinforcement.

[0010] Preferably, one end of the connecting drill pipe is provided with a polygonal insertion hole, the other end of the connecting drill pipe is provided with a polygonal insertion pipe, the outer side surface of the connecting drill pipe is provided with a radial bolt hole communicating with the polygonal insertion hole and a locking bolt matching with the radial bolt hole. Among any two adjacent connecting drill pipes, the polygonal insertion pipe of one connecting drill pipe is inserted into the polygonal insertion hole of the other connecting drill pipe, and the lower end of the tail drill pipe is also provided with a polygonal insertion pipe for matching with the polygonal insertion hole.

[0011] Preferably, the high-pressure jet grouting rig further includes a centrifugal locking device. Radial installation holes are provided on the outer side surfaces of the polygonal insertion pipes of each connecting drill pipe and the polygonal insertion pipe at the lower end of the tail drill pipe. The centrifugal locking device corresponds to the radial installation holes one by one. The centrifugal locking device includes a radial sliding sleeve arranged in the corresponding radial installation hole and a radial locking rod slidably arranged in the radial sliding sleeve. The inner end of the radial sliding sleeve is closed, and a tension spring is connected between the inner end of the radial locking rod and the inner end of the radial sliding sleeve. Annular clamping grooves for cooperating with the radial locking rods are provided on the inner side walls of the polygonal insertion holes of each connecting drill pipe.

[0012] After the polygonal insertion pipe is inserted into the polygonal insertion hole, the radial locking rod on the polygonal insertion pipe faces the annular clamping groove in the corresponding polygonal insertion hole;

[0013] When the rotation speed of the jet grouting drill pipe exceeds the set value, the radial locking rod on the jet grouting drill pipe will overcome the tension of the tension spring under the action of centrifugal force, slide outward along the radial sliding sleeve, and insert the outer end of the radial locking rod into the corresponding annular card slot.

[0014] In the prior art, after the jet grouting drill pipe drills into the specified depth each time, the sliding seat moving actuator drives the sliding seat, the rotary power head and the tail of the drill pipe to move upward by a set distance along the first guide rail. Then, the operator installs another connecting drill pipe onto the jet grouting drill pipe. Then, the sliding seat moving actuator drives the sliding seat, the rotary power head and the tail of the drill pipe to move downward by a set distance along the first guide rail, so that the polygonal insertion pipe at the lower end of the tail drill pipe is inserted into the polygonal insertion hole at the upper end of the connecting drill pipe. Then, the operator tightens the locking bolt to connect the two adjacent connecting drill pipes. However, in actual construction, there are situations where the operator does not tighten the locking bolt properly during operation, or the tightening is insufficient, or the thread of the locking bolt and / or the thread of the threaded hole cooperating with the locking bolt is damaged, or the locking bolt becomes loose due to vibration, resulting in unreliable connection of the two adjacent connecting drill pipes. As a result, during the process of the sliding seat moving actuator driving the sliding seat and the jet grouting drill pipe to move upward along the first guide rail, the connecting drill pipe connected at a certain place in the jet grouting drill pipe drilled into the soil layer becomes disconnected, causing a failure in the construction of the high-pressure jet grouting pile, and a part of the jet grouting drill pipe falls off into the soil layer. To solve the above problems, this solution sets up a centrifugal locking device. Specifically,

[0015] During the process of the jet grouting drill pipe constructing a high-pressure jet grouting pile, the jet grouting drill pipe is in a high-speed rotating state. At this time, the radial locking rod will be inserted into the corresponding annular card slot under the action of centrifugal force. In this way, while the jet grouting drill pipe rotates, it generally moves back. During the process of constructing a high-pressure jet grouting pile in the soil layer, even if the locking bolts of the two connecting drill pipes are not tightened, these two connecting drill pipes will not become disconnected under the cooperation of the radial locking rod and the annular card slot, thus effectively solving the above problems. On the other hand, since the polygonal insertion pipe at the lower end of the tail drill pipe is also provided with a centrifugal locking device, during the process of the jet grouting drill pipe constructing a high-pressure jet grouting pile, the radial locking rod on the polygonal insertion pipe at the lower end of the tail drill pipe will be inserted into the corresponding annular card slot under the action of centrifugal force. In this way, the operator does not need to tighten the locking bolt on a connecting drill pipe adjacent to the tail drill pipe, and the operation of tightening the locking bolt to connect the tail drill pipe and the connecting drill pipe can be omitted, which can further simplify the operation steps of manually tightening the locking bolt. During the process of the jet grouting drill pipe of the high-pressure jet grouting machine drilling into the soil layer, and during the process of the jet grouting drill pipe of the high-pressure jet grouting machine moving back after drilling into the set depth of the soil layer, the operator only needs to tighten the locking bolt to connect the two adjacent connecting drill pipes, and the operation of tightening the locking bolt to connect the tail drill pipe and the connecting drill pipe can be omitted.

[0016] Preferably, the radial sliding sleeve and the radial mounting hole are connected by a thread. In this way, the installation and disassembly of the radial sliding sleeve are facilitated.

[0017] Preferably, a limiting chute extending along the axial direction of the radial sliding sleeve is provided on the inner wall of the radial sliding sleeve, and a sliding block cooperating with the limiting chute is provided on the outer side surface of the radial locking rod.

[0018] Preferably, the high-pressure rotary jet grouting pile machine further includes a tail drill pipe separation anti-rotation and alignment device. The sliding seat includes a first sliding seat slidably arranged on the first guide rail, a second guide rail arranged on the first sliding seat and parallel to the first guide rail, an upper limiting block and a lower limiting block of the sliding seat arranged on the first sliding seat, and a second sliding seat slidably arranged on the second guide rail and located between the upper limiting block and the lower limiting block of the sliding seat. The sliding seat moving actuator is used to drive the first sliding seat to move along the first guide rail; the tail drill pipe separation anti-rotation and alignment device includes a torsion spring, a fixed sleeve fixedly arranged at the lower part of the tail drill pipe, a plurality of axial locking grooves circumferentially and uniformly distributed on the lower outer side surface of the fixed sleeve, a locking sleeve sleeved on the lower part of the tail drill pipe, a connecting member connecting the locking sleeve and the first sliding seat, a locking plate accommodating groove arranged on the inner wall of the locking sleeve, a locking plate for cooperating with the axial locking groove, and a locking plate limiting member arranged in the locking plate accommodating groove. The outer side surface of the fixed sleeve, the locking sleeve and the rotation axis of the tail drill pipe are coaxially distributed. The axial locking groove extends along the rotation axis direction of the tail drill pipe, and the lower end of the axial locking groove communicates with the lower end surface of the fixed sleeve. The upper part of the locking plate is located in the locking plate accommodating groove, and the upper part of the locking plate is rotatably arranged in the locking plate accommodating groove through a through shaft rod. The locking plate limiting member is located outside the locking plate. The torsion spring is used to drive the lower part of the locking plate to rotate towards the axis direction of the locking sleeve around the shaft rod; when the second sliding seat abuts against the lower limiting block of the sliding seat, the locking sleeve is sleeved outside the fixed sleeve, the lower part of the locking plate abuts against the upper part of the outer side surface of the fixed sleeve under the action of the torsion spring, and the locking plate is located above the locking plate accommodating groove; when the second sliding seat abuts against the upper limiting block of the sliding seat, the fixed sleeve is located above the locking sleeve.

[0019] Preferably, the high-pressure rotary jet grouting pile machine further includes a rotating seat rotatably arranged on the vehicle frame through a horizontal shaft and a rotating seat rotation actuator for driving the rotating seat to rotate. The support tower rod is fixed on the rotating seat. In this way, the inclination state of the rotary jet grouting rod can be adjusted to construct a right-inclined high-pressure rotary jet grouting pile in the lower right of the tunnel and a left-inclined high-pressure rotary jet grouting pile in the lower left of the tunnel, so as to provide reliable multi-angle support and reinforcement for the tunnel through the right-inclined high-pressure rotary jet grouting pile and the left-inclined high-pressure rotary jet grouting pile, and the tunnel reinforcement effect is good.

[0020] Preferably, the drill pipe placement rack includes a chassis disposed on the installation platform, a rotating bracket rotatably disposed on the chassis through a vertical shaft rod, and a rotation driving device for driving the rotating bracket to rotate around the vertical shaft rod. A plurality of vertically inserted holes are circumferentially and uniformly distributed around the vertical shaft rod on the rotating bracket, and the vertically inserted holes are used for inserting the connecting drill pipes of the jet grouting drill rod. In this way, the connecting drill pipes to be installed and the connecting drill pipes disassembled from the jet grouting drill rod can be inserted into the vertically inserted holes. On the one hand, it is beneficial to utilize the height space to place the connecting drill pipes, and on the other hand, it is convenient for the manipulator to grab the connecting drill pipes.

[0021] Preferably, the rotating bracket includes an upper installation flat plate and a lower installation flat plate. The vertically inserted holes include a polygonal insertion hole disposed on the upper installation flat plate and a lower limit hole disposed on the lower installation flat plate.

[0022] The beneficial effects of the present invention are as follows: It can reduce manual operation, lower labor intensity, and improve the construction efficiency of tunnel reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a soil-cement pile construction device according to the first specific embodiment of the present invention.

[0024] Figure 2 is Figure 1 a partial enlarged view of part A in

[0025] Figure 3 is a partial structural schematic diagram of a jet grouting drill rod according to the first specific embodiment of the present invention.

[0026] Figure 4 is a schematic structural diagram of a drill pipe placement rack according to the first specific embodiment of the present invention.

[0027] Figure 5 is a partial structural schematic diagram of a centrifugal locking device according to the second specific embodiment of the present invention.

[0028] Figure 6 is Figure 5 a partial enlarged view of part B in

[0029] Figure 7 is a partial structural schematic diagram of a soil-cement pile construction device according to the third specific embodiment of the present invention, in which the second sliding seat abuts against the lower sliding seat limiting block in this figure.

[0030] Figure 8 is a partial enlarged view of part C in 7..

[0031] Figure 9 is another partial structural schematic diagram of a soil-cement pile construction device according to the third specific embodiment of the present invention, in which the second sliding seat abuts against the upper sliding seat limiting block in this figure.

[0032] In the figure:

[0033] Traveling vehicle 1;

[0034] High-pressure jet grouting rig 2, jet grouting drill pipe 2.1, connecting drill pipe 2.11, polygonal insertion pipe 2.111, polygonal insertion hole 2.112, tail drill pipe 2.12, drill pipe head 2.13, drill bit 2.131, high-pressure jet grouting hole 2.132, vehicle frame 2.2, support tower 2.3, rotary power head 2.4, rotating seat 2.5, sliding seat 2.6, first sliding seat 2.61, second guide rail 2.62, second sliding seat 2.63, upper limit block of sliding seat 2.64, lower limit block of sliding seat 2.65, rotating actuator of rotating seat 2.7, first guide rail 2.8, centrifugal locking device 2.9, radial sliding sleeve 2.91, radial locking rod 2.92, tension spring 2.93, limit sliding groove 2.94, slider 2.95;

[0035] Manipulator 3;

[0036] Drill pipe placement rack 4, drill pipe placement rack 4.1, lower mounting plate 4.11, upper mounting plate 4.12, rotary drive device 4.2;

[0037] Tail drill pipe separation anti-rotation alignment device 5, fixed sleeve 5.1, locking sleeve 5.2, axial locking groove 5.3, locking plate receiving groove 5.4, locking plate 5.5, shaft rod 5.6. Detailed implementation mode

[0038] To make the objectives, technical solutions and advantages of the embodiments of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly explained and described below with reference to the accompanying drawings. However, the following embodiments are only the preferred embodiments of the present invention, rather than all embodiments. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0039] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the solution, and cannot be construed as a limitation to the solution of the present invention.

[0040] These and other aspects of the embodiments of the present invention will be apparent from the following description and the accompanying drawings. In these descriptions and drawings, specific embodiments of the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited thereto. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined, and the meaning of "several" means one or more.

[0042] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Specific Embodiment 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 shown, a cement-soil pile construction device includes a walking vehicle 1, a high-pressure jet grouting rig 2, and a drill pipe automatic installation device. An installation platform is provided on the walking vehicle. The walking vehicle is a crawler-type walking vehicle, a rubber wheel-type walking vehicle, or a track walking vehicle suitable for walking on rails. In this embodiment, the walking vehicle is a track walking vehicle suitable for walking on rails.

[0044] The high-pressure jet grouting rig 2 includes a jet grouting drill rod 2.1, a vehicle frame 2.2, a support tower rod 2.3 arranged on the vehicle frame, a first guide rail 2.8 arranged on the support tower rod, a sliding seat 2.6 sliding along the first guide rail, a sliding seat moving actuator for driving the sliding seat, and a rotary power head 2.4 arranged on the sliding seat. The sliding seat moving actuator is an oil cylinder or an electric cylinder or a linear slide rail or other moving actuators arranged on the support tower rod. In this embodiment, the sliding seat moving actuator is a chain drive mechanism arranged on the support tower rod, and the sliding seat is connected to the chain of the chain drive mechanism. The high-pressure jet grouting rig is installed on the installation platform through the vehicle frame. The jet grouting drill rod includes a drill body and a drill rod tail connected to the upper end of the drill body. The drill body is composed of a plurality of connecting drill pipes 2.11 connected in sequence. The drill rod tail includes a tail drill pipe 2.12 rotatably arranged on the sliding seat. The rotary power head is used to drive the rotation of the tail drill pipe. In this embodiment, the rotary power head includes a drive motor for driving the tail drill pipe.

[0045] The upper end of the connecting drill pipe 2.11 is provided with a polygonal insertion hole 2.112, and the lower end of the connecting drill pipe is provided with a polygonal insertion pipe 2.111. The outer side surface of the connecting drill pipe is provided with a radial bolt hole communicated with the polygonal insertion hole and a locking bolt matched with the radial bolt hole. Among any two adjacent connecting drill pipes, the polygonal insertion pipe of one connecting drill pipe is inserted into the polygonal insertion hole of the other connecting drill pipe. The lower end of the tail drill pipe is also provided with a polygonal insertion pipe 2.111 for cooperating with the polygonal insertion hole.

[0046] The drill pipe automatic installation device includes a drill pipe placement rack 4 and a manipulator 3 arranged on the installation platform. The drill pipe placement rack is used to place the connecting drill pipes of the jet grouting drill rod, and the manipulator is used to carry and install the connecting drill pipes on the drill pipe placement rack onto the jet grouting drill rod of the high-pressure jet grouting rig, or to remove the connecting drill pipes on the jet grouting drill rod of the high-pressure jet grouting rig and place them on the drill pipe placement rack.

[0047] During the construction of the high-pressure jet grouting pile by the cement-soil pile construction equipment of this embodiment, when the jet grouting drill pipe of the high-pressure jet grouting rig drills into the soil layer, after the jet grouting drill pipe drills into the specified depth each time, the sliding seat moving actuator drives the sliding seat, the rotary power head and the tail of the drill pipe to move upward by a set distance along the first guide rail, so that the polygonal insertion pipe at the lower end of the tail drill pipe is separated from the polygonal insertion hole at the upper end of the connecting drill pipe; then, the manipulator is used to carry and install a connecting drill pipe on the drill pipe placing rack onto the jet grouting drill pipe of the high-pressure jet grouting rig. Specifically, the manipulator grabs a connecting drill pipe on the drill pipe placing rack, and then inserts the polygonal insertion pipe at the lower end of the connecting drill pipe into the polygonal insertion hole of the connecting drill pipe at the upper end of the jet grouting drill pipe; then, the sliding seat moving actuator drives the sliding seat, the rotary power head and the tail of the drill pipe to move downward by a set distance along the first guide rail, so that the polygonal insertion pipe at the lower end of the tail drill pipe is inserted into the polygonal insertion hole at the upper end of the connecting drill pipe. To realize that the manipulator is used to carry and install a connecting drill pipe on the drill pipe placing rack onto the jet grouting drill pipe of the high-pressure jet grouting rig; then the operator tightens the locking bolts to connect two adjacent connecting drill pipes.

[0048] Similarly, after the jet grouting drill pipe of the high-pressure jet grouting rig drills into the set depth of the soil layer, during the process of the jet grouting drill pipe moving back (i.e., moving upward), after the jet grouting drill pipe moves back by the specified length each time, the connecting drill pipe on the jet grouting drill pipe of the high-pressure jet grouting rig is removed by the manipulator and placed on the drill pipe placing rack; thus, during the construction of the high-pressure jet grouting pile, there is no need for manual handling to install or remove the connecting drill pipe of the jet grouting drill pipe, so as to reduce manual operation, lower labor intensity, and improve the construction efficiency of tunnel reinforcement.

[0049] Specifically, as Figure 3 shown, the jet grouting drill pipe further includes a drill pipe head 2.13 provided at the lower end of the drill body, and a drill bit 2.131 is provided at the lower end of the drill pipe head. The inner hole of the connecting drill pipe constitutes a grouting pipeline. A high-pressure jet grouting hole 2.132 is provided at the lower part of the side wall of the drill pipe head, and the high-pressure jet grouting hole is communicated with the grouting pipeline. The tail of the drill pipe further includes a rotary joint rotatably connected to the upper end of the tail drill pipe, and a cement grouting port and an air injection port are provided on the rotary joint. The high-pressure jet grouting rig can directly use this drill pipe device to drill holes, so as to drive the high-pressure jet grouting hole of the drill pipe head to drill into the set depth; then directly use the drill pipe device for high-pressure jet grouting to form a high-pressure jet grouting pile, thus combining the two processes of pilot hole drilling and high-pressure jet grouting in the MJS method into one, realizing the integrated operation of pilot hole drilling and high-pressure jet grouting, and improving the construction efficiency.

[0050] Furthermore, as Figure 1 、 Figure 4As shown in the figure, the drill pipe placement rack 4 includes a chassis disposed on the installation platform, a rotating bracket 4.1 rotatably disposed on the chassis through a vertical shaft rod, and a rotary drive device 4.2 for driving the rotating bracket to rotate around the vertical shaft rod. A plurality of vertically inserted holes are circumferentially and uniformly distributed around the vertical shaft rod on the rotating bracket, and the vertically inserted holes are used for inserting the connecting drill pipes of the jet grouting drill pipe. The rotating bracket includes an upper mounting flat plate 4.12, a lower mounting flat plate 4.11, and a connecting member connecting the upper mounting flat plate and the lower mounting flat plate. The vertically inserted holes include a polygonal insertion hole disposed on the upper mounting flat plate and a lower limit hole disposed on the lower mounting flat plate. In this way, the connecting drill pipes to be installed and the connecting drill pipes disassembled from the jet grouting drill pipe can be inserted into the vertically inserted holes. On the one hand, it is beneficial to utilize the height space to place the connecting drill pipes, and on the other hand, it is convenient for the manipulator to grasp the connecting drill pipes.

[0051] Further, as Figure 1 , Figure 2 shown, the high-pressure jet grouting pile machine further includes a rotating seat 2.5 rotatably disposed on the vehicle frame through a horizontal shaft and a rotating seat rotation actuator 2.7 for driving the rotating seat to rotate. The horizontal shaft is parallel to the front-rear direction of the vehicle frame. In this embodiment, the rotating seat rotation actuator is an oil cylinder, one end of the oil cylinder is hinged to the vehicle frame, and the other end of the oil cylinder is hinged to the rotating seat. The support tower is fixed on the rotating seat. In this way, the jet grouting drill pipe can be adjusted to be in an inclined state to construct a right-inclined high-pressure jet grouting pile in the lower right of the tunnel and a left-inclined high-pressure jet grouting pile in the lower left of the tunnel, so as to provide reliable multi-angle support and reinforcement for the tunnel through the right-inclined high-pressure jet grouting pile and the left-inclined high-pressure jet grouting pile, and the tunnel reinforcement effect is good.

[0052] Specific Embodiment 2, the rest of the structure of this embodiment refers to Specific Embodiment 1, and the difference is that

[0053] As Figure 5 , Figure 6As shown in the figure, the high-pressure jet grouting rig further includes a centrifugal locking device 2.9. Radial mounting holes are provided on the outer side surfaces of the polygonal insertion pipes 2.111 connecting each drill pipe and the polygonal insertion pipe 2.111 at the lower end of the tail drill pipe. The radial mounting holes extend along the radial direction of the polygonal insertion pipe. The centrifugal locking devices correspond to the radial mounting holes one by one. The centrifugal locking device includes a radial sliding sleeve 2.91 disposed in the corresponding radial mounting hole and a radial locking rod 2.92 slidably disposed in the radial sliding sleeve. The axis of the radial sliding sleeve extends along the radial direction of the polygonal insertion pipe. The outer end of the radial sliding sleeve is open, and the outer end of the radial sliding sleeve is located in the radial mounting hole. The inner end of the radial sliding sleeve is closed, and the inner end of the radial locking rod is connected to the inner end of the radial sliding sleeve by a tension spring 2.93. In this embodiment, a tension spring receiving hole is provided at the inner end of the radial locking rod, the tension spring is located in the tension spring receiving hole, one end of the tension spring is connected to the inner end of the tension spring receiving hole, and the other end of the tension spring is connected to the inner end of the radial sliding sleeve. The inner end of the radial locking rod abuts against the inner end face of the radial sliding sleeve under the action of the tension spring. When the inner end of the radial locking rod abuts against the inner end face of the radial sliding sleeve, the radial locking rod is completely located within the radial sliding sleeve. Annular clamping grooves for cooperating with the radial locking rods are provided on the inner side walls of the polygonal insertion holes of each connecting drill pipe.

[0054] After the polygonal insertion pipe is inserted into the polygonal insertion hole (in the text, after the polygonal insertion pipe is inserted into the polygonal insertion hole means that the lower end face of the connecting drill pipe where the polygonal insertion pipe is located abuts against the upper end face of the connecting drill pipe where the polygonal insertion hole is located), the radial locking rod on the polygonal insertion pipe faces the annular clamping groove in the corresponding polygonal insertion hole. When the rotation speed of the jet grouting drill rod exceeds the set value, the radial locking rod on the jet grouting drill rod will overcome the tension of the tension spring under the action of centrifugal force, slide outwards along the radial sliding sleeve, and insert the outer end of the radial locking rod into the corresponding annular clamping groove.

[0055] In the prior art, after the jet grouting drill pipe drills to a specified depth each time, the sliding seat moving actuator drives the sliding seat, the rotary power head and the tail of the drill pipe to move upward a set distance along the first guide rail. Then, the operator installs another connecting drill pipe onto the jet grouting drill pipe. Then, the sliding seat moving actuator drives the sliding seat, the rotary power head and the tail of the drill pipe to move downward a set distance along the first guide rail, so that the polygonal insertion pipe at the lower end of the tail drill pipe is inserted into the polygonal insertion hole at the upper end of the connecting drill pipe. Then, the operator tightens the locking bolt to connect two adjacent connecting drill pipes. However, in actual construction, there are situations where the operator does not tighten the locking bolt properly due to non-standard operation, or the tightening is insufficient, or the thread of the locking bolt and / or the thread of the threaded hole cooperating with the locking bolt is damaged, or the locking bolt becomes loose due to vibration, resulting in unreliable connection of two adjacent connecting drill pipes. As a result, during the process of the sliding seat moving actuator driving the sliding seat and the jet grouting drill pipe to move upward along the first guide rail, the connecting drill pipe connected at a certain position in the jet grouting drill pipe inserted into the soil layer becomes disconnected, causing a failure in the construction of the high-pressure jet grouting pile, and a part of the jet grouting drill pipe falls into the soil layer. To solve the above problems, this solution provides a centrifugal locking device. Specifically,

[0056] During the process of the jet grouting drill pipe constructing a high-pressure jet grouting pile, the jet grouting drill pipe is in a high-speed rotating state. At this time, the radial locking rod will be inserted into the corresponding annular card slot under the action of centrifugal force. In this way, while the jet grouting drill pipe rotates, it also moves back. During the process of constructing a high-pressure jet grouting pile in the soil layer, even if the locking bolts of two connecting drill pipes are not tightened, these two connecting drill pipes will not become disconnected under the cooperative action of the radial locking rod and the annular card slot, thus effectively solving the above problems. On the other hand, since the polygonal insertion pipe at the lower end of the tail drill pipe is also provided with a centrifugal locking device, during the process of the jet grouting drill pipe constructing a high-pressure jet grouting pile, the radial locking rod on the polygonal insertion pipe at the lower end of the tail drill pipe will be inserted into the corresponding annular card slot under the action of centrifugal force. In this way, the operator does not need to tighten the locking bolt on a connecting drill pipe adjacent to the tail drill pipe, and the operation of tightening the locking bolt to connect the tail drill pipe and the connecting drill pipe can be omitted, which can further simplify the operation steps of manually tightening the locking bolt. During the process of the jet grouting drill pipe of the high-pressure jet grouting machine drilling into the soil layer, and during the process of the jet grouting drill pipe of the high-pressure jet grouting machine moving back after drilling to a set depth in the soil layer, the operator only needs to tighten the locking bolt to connect two adjacent connecting drill pipes, and the operation of tightening the locking bolt to connect the tail drill pipe and the connecting drill pipe can be omitted.

[0057] In this embodiment, the radial sliding sleeve and the radial mounting hole are connected by threads. In this way, it is convenient for the installation and disassembly of the radial sliding sleeve.

[0058] On the inner wall of the radial sliding sleeve, there is a limiting chute 2.94 extending along the axial direction of the radial sliding sleeve. On the outer side surface of the radial locking rod, there is a sliding block 2.95 that cooperates with the limiting chute. In this way, the radial locking rod can be prevented from detaching from the radial sliding sleeve.

[0059] Specific Embodiment Three, for the rest of the structure of this embodiment, refer to Specific Embodiment One or Specific Embodiment Two. The difference is that

[0060] As Figure 7 、 Figure 8 shown in the figure, the high-pressure rotary jet grouting pile machine further includes a tail drill pipe separation anti-rotation and alignment device 5. The sliding seat 2.6 includes a first sliding seat 2.61 slidably arranged on the first guide rail, a second guide rail 2.62 arranged on the first sliding seat and parallel to the first guide rail, an upper limit block 2.64 and a lower limit block 2.65 of the sliding seat arranged on the first sliding seat, and a second sliding seat 2.63 slidably arranged on the second guide rail and located between the upper limit block and the lower limit block of the sliding seat. The sliding seat moving actuator is used to drive the first sliding seat to move along the first guide rail.

[0061] The tail drill pipe separation anti-rotation and alignment device 5 includes a torsion spring, a fixed sleeve 5.1 fixedly arranged at the lower part of the tail drill pipe, a plurality of axial locking grooves 5.3 circumferentially and uniformly distributed on the lower part of the outer side surface of the fixed sleeve, a locking sleeve 5.2 sleeved on the lower part of the tail drill pipe, a connecting member connecting the locking sleeve and the first sliding seat, a locking plate accommodating groove 5.4 arranged on the inner wall of the locking sleeve, a locking plate 5.5 for cooperating with the axial locking groove, and a locking plate limiting member arranged in the locking plate accommodating groove. The outer side surface of the fixed sleeve, the locking sleeve and the rotation axis of the tail drill pipe are coaxially distributed. The axial locking groove extends along the rotation axis direction of the tail drill pipe, and the lower end of the axial locking groove communicates with the lower end surface of the fixed sleeve. In this embodiment, the number of axial locking grooves is 10 - 30. The upper part of the locking plate is located in the locking plate accommodating groove, and the upper part of the locking plate is rotatably arranged in the locking plate accommodating groove through a shaft rod 5.6. The locking plate limiting member is located outside the locking plate. The torsion spring is used to drive the lower part of the locking plate to rotate towards the axis direction of the locking sleeve around the shaft rod.

[0062] As Figure 7 shown in the figure, when the second sliding seat abuts against the lower limit block of the sliding seat, the locking sleeve is sleeved outside the fixed sleeve. The lower part of the locking plate abuts against the upper part of the outer side surface of the fixed sleeve under the action of the torsion spring, and the locking plate is located above the locking plate accommodating groove. In this embodiment, a ball is arranged on the side of the lower part of the locking plate facing the center of the locking sleeve. When the second sliding seat abuts against the lower limit block of the sliding seat, the locking sleeve is sleeved outside the fixed sleeve, and the ball on the lower part of the locking plate abuts against the upper part of the outer side surface of the fixed sleeve under the action of the torsion spring, and the locking plate is located above the locking plate accommodating groove.

[0063] As Figure 9As shown, when the second sliding seat abuts against the upper limit block of the sliding seat, the fixed sleeve is located above the locking sleeve. Under the action of the torsion spring, the locking plate abuts against the locking plate limit member, and the lower part of the locking plate extends into the inner hole of the locking sleeve.

[0064] During the construction of high-pressure jet grouting piles by a high-pressure jet grouting rig, the operator often operates irregularly or misoperates, resulting in the inability of the polygonal insertion pipe at the lower end of the tail drill pipe to be inserted into the polygonal insertion hole of the connecting drill pipe, seriously affecting the construction operation efficiency. Specifically, during the process of the jet grouting drill pipe of the high-pressure jet grouting rig drilling into the soil layer, before the jet grouting drill pipe completely stops rotating, the operator controls the sliding seat moving actuator to drive the sliding seat, the rotary power head and the drill pipe tail to move upward along the first guide rail, so that the tail insertion pipe at the lower end of the tail drill pipe is separated from the polygonal insertion hole of the connecting drill pipe; at this time, since the jet grouting drill pipe has not stopped rotating, after the tail insertion pipe at the lower end of the tail drill pipe is separated from the polygonal insertion hole, the connecting drill pipe of the drill body of the jet grouting drill pipe will quickly stop rotating under the action of the soil layer resistance, while the tail drill pipe will continue to rotate for a certain period. In this way, it is very easy for the polygonal insertion pipe at the lower end of the tail drill pipe to be misaligned with the polygonal insertion hole of the connecting drill pipe (that is, the polygonal insertion pipe and the polygonal insertion hole are not aligned). Thus, when the manipulator grabs a connecting drill pipe on the drill pipe placement rack and inserts the polygonal insertion pipe at the lower end of the connecting drill pipe into the polygonal insertion hole of the connecting drill pipe at the upper end of the jet grouting drill pipe, during the process of the sliding seat moving actuator driving the sliding seat, the rotary power head and the drill pipe tail to move downward along the first guide rail, due to the misalignment of the polygonal insertion pipe at the lower end of the tail drill pipe and the polygonal insertion hole of the connecting drill pipe, the polygonal insertion pipe at the lower end of the tail drill pipe will not be able to be inserted into the polygonal insertion hole of the connecting drill pipe.

[0065] To solve the problem that during the construction of high-pressure jet grouting piles by a high-pressure jet grouting rig, the operator often operates irregularly or misoperates, resulting in the inability of the polygonal insertion pipe at the lower end of the tail drill pipe to be inserted into the polygonal insertion hole of the connecting drill pipe, seriously affecting the construction operation efficiency, this embodiment provides a tail drill pipe separation anti-rotation alignment device. Specifically,

[0066] During the process of the rotary jet drill pipe of the high-pressure rotary jet grouting rig drilling into the soil layer, the lower end face of the tail drill pipe abuts against the upper end face of the connecting drill pipe at the upper end of the rotary jet drill pipe, and the second sliding seat abuts against the upper limit block on the sliding seat; the sliding seat moving actuator drives the second sliding seat and the rotary jet drill pipe to move downward together through the upper limit block on the sliding seat of the first sliding seat, so that the rotary jet drill pipe drills into the soil layer; after the rotary jet drill pipe drills into the specified depth each time, if the operator installs and stipulates that after the rotary jet drill pipe completely stops rotating, the sliding seat moving actuator is controlled to drive the sliding seat, the rotary power head and the drill pipe tail to move upward along the first guide rail, so that the tail insertion pipe at the lower end of the tail drill pipe is separated from the polygonal insertion hole of the connecting drill pipe, then the tail insertion pipe at the lower end of the tail drill pipe and the polygonal insertion hole of the connecting drill pipe remain in an aligned state and will not affect normal use;

[0067] If, when the rotary jet drill pipe has not completely stopped rotating, the operator controls the sliding seat moving actuator to drive the sliding seat, the rotary power head and the drill pipe tail to move upward along the first guide rail, in this process, the first sliding seat and the locking sleeve first move upward along the first guide rail until the lower limit block of the sliding seat abuts against the second sliding seat. In this process, the second sliding seat and the tail drill pipe remain abutted against the upper end face of the connecting drill pipe at the upper end of the rotary jet drill pipe under the action of their own weights and do not move; and during the process of the locking sleeve moving upward along the first guide rail, the locking sleeve will sleeved and fixed outside the fixed sleeve from bottom to top, so that the lower part of the locking plate abuts against the outer side surface of the fixed sleeve under the action of the torsion spring. Since the tail drill pipe and the fixed sleeve are still rotating during this process, after the locking plate is aligned with one of the axial locking grooves, the lower part of the locking plate is snapped into the axial locking groove under the action of the torsion spring, thereby locking the tail drill pipe and stopping the rotation of the rotary jet drill pipe; thereafter, the locking sleeve continues to move upward until the lower limit block of the sliding seat abuts against the second sliding seat; when the lower limit block of the sliding seat abuts against the second sliding seat, the locking plate is separated from the locking plate receiving groove and is located above the locking plate receiving groove. After the lower limit block of the sliding seat abuts against the second sliding seat, the sliding seat moving actuator drives the first sliding seat, the second sliding seat, the rotary power head and the drill pipe tail to move upward synchronously along the first guide rail, so that the tail insertion pipe at the lower end of the tail drill pipe is separated from the polygonal insertion hole of the connecting drill pipe. In this process, since the rotary jet drill pipe has stopped rotating, the tail insertion pipe at the lower end of the tail drill pipe and the polygonal insertion hole of the connecting drill pipe remain in an aligned state and will not affect normal use.

[0068] On the other hand, after the rotary jet drill pipe of the high-pressure rotary jet grouting rig drills into the set depth of the soil layer, during the process of the rotary jet drill pipe moving back, the lower limit block of the sliding seat abuts against the second sliding seat, and the sliding seat moving actuator drives the first sliding seat, the second sliding seat, the rotary power head and the drill pipe tail to move upward synchronously along the first guide rail, thereby realizing the movement of the rotary jet drill pipe back; at the same time, since when the lower limit block of the sliding seat abuts against the second sliding seat, the locking plate is separated from the locking plate receiving groove and is located above the locking plate receiving groove, in this way, it will not affect the rotation of the rotary jet drill pipe, and thus will not affect the construction of the high-pressure rotary jet grouting pile by the rotary jet drill pipe.

[0069] The above are only the preferred embodiments of the present invention and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent transformations made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A cement-soil pile construction device, comprising: A high-pressure jet grouting rig, which includes a jet grouting drill pipe, a vehicle frame, a support tower rod arranged on the vehicle frame, a first guide rail arranged on the support tower rod, a sliding seat sliding along the first guide rail, a sliding seat moving actuator for driving the sliding seat, and a rotary power head arranged on the sliding seat. The jet grouting drill pipe includes a drill body and a drill pipe tail connected to the upper end of the drill body. The drill body is composed of several connecting drill pipes connected in sequence. The drill pipe tail includes a tail drill pipe rotatably arranged on the sliding seat. The rotary power head is used to drive the tail drill pipe to rotate. The characteristic is that it further includes: A walking vehicle, on which there is an installation platform. The high-pressure jet grouting rig is installed on the installation platform through the vehicle frame. The walking vehicle is a crawler-type walking vehicle or a wheel-type walking vehicle or a track walking vehicle suitable for walking on a railway track; A drill pipe automatic installation device, which includes a drill pipe placement rack and a manipulator arranged on the installation platform. The drill pipe placement rack is used to place the connecting drill pipes of the jet grouting drill pipe, and the manipulator is used to carry and install the connecting drill pipes on the drill pipe placement rack onto the jet grouting drill pipe of the high-pressure jet grouting rig, or to remove the connecting drill pipes on the jet grouting drill pipe of the high-pressure jet grouting rig and place them on the drill pipe placement rack; The high-pressure jet grouting rig further includes a tail drill pipe separation anti-rotation alignment device, which includes a torsion spring, a fixed sleeve fixedly arranged on the lower part of the tail drill pipe, a plurality of axial locking grooves circumferentially and evenly distributed on the lower outer side of the fixed sleeve, a locking sleeve sleeved on the lower part of the tail drill pipe, a connecting member connecting the locking sleeve and the first sliding seat, a locking plate accommodating groove arranged on the inner wall of the locking sleeve, a locking plate for cooperating with the axial locking groove, and a locking plate limiting member arranged in the locking plate accommodating groove.

2. The cement-soil pile construction device according to claim 1, characterized in that, One end of the connecting drill pipe is provided with a polygonal insertion hole, the other end of the connecting drill pipe is provided with a polygonal insertion pipe, the outer side surface of the connecting drill pipe is provided with a radial bolt hole communicated with the polygonal insertion hole and a locking bolt cooperating with the radial bolt hole. Among any two adjacent connecting drill pipes, the polygonal insertion pipe of one connecting drill pipe is inserted into the polygonal insertion hole of the other connecting drill pipe. The lower end of the tail drill pipe is also provided with a polygonal insertion pipe for cooperating with the polygonal insertion hole.

3. The cement-soil pile construction device according to claim 2, characterized in that, The high-pressure jet grouting rig further includes a centrifugal locking device. Radial installation holes are provided on the outer side surfaces of the polygonal insertion pipes of each connecting drill pipe and the polygonal insertion pipe at the lower end of the tail drill pipe. The centrifugal locking device corresponds to the radial installation holes one by one. The centrifugal locking device includes a radial sliding sleeve arranged in the corresponding radial installation hole and a radial locking rod slidably arranged in the radial sliding sleeve. The inner end of the radial sliding sleeve is closed, and a tension spring is connected between the inner end of the radial locking rod and the inner end of the radial sliding sleeve. Annular clamping grooves for cooperating with the radial locking rod are provided on the inner side walls of the polygonal insertion holes of each connecting drill pipe.

4. The cement-soil pile construction device according to claim 3, characterized in that, After the polygonal insertion pipe is inserted into the polygonal insertion hole, the radial locking rod on the polygonal insertion pipe faces the annular card slot in the corresponding polygonal insertion hole; When the rotation speed of the jet grouting drill pipe exceeds the set value, the radial locking rod on the jet grouting drill pipe will overcome the tension of the tension spring under the action of centrifugal force, slide outwards along the radial sliding sleeve, and insert the outer end of the radial locking rod into the corresponding annular card slot.

5. The cement-soil pile construction equipment according to claim 3, characterized in that, The radial sliding sleeve is threadedly connected with the radial mounting hole.

6. The cement-soil pile construction equipment according to claim 3, characterized in that, A limiting chute extending along the axial direction of the radial sliding sleeve is provided on the inner wall of the radial sliding sleeve, and a slider cooperating with the limiting chute is provided on the outer side surface of the radial locking rod.

7. The cement-soil pile construction equipment according to claim 2, characterized in that, The sliding seat includes a first sliding seat slidably arranged on the first guide rail, a second guide rail arranged on the first sliding seat and parallel to the first guide rail, an upper limit block and a lower limit block of the sliding seat arranged on the first sliding seat, and a second sliding seat slidably arranged on the second guide rail and located between the upper limit block and the lower limit block of the sliding seat. The sliding seat moving actuator is used to drive the first sliding seat to move along the first guide rail; The outer side surface of the fixed sleeve, the locking sleeve and the rotation axis of the tail drill pipe are coaxially distributed. The axial locking groove extends along the rotation axis direction of the tail drill pipe, and the lower end of the axial locking groove communicates with the lower end surface of the fixed sleeve. The upper part of the locking plate is located in the locking plate receiving groove, and the upper through-shaft of the locking plate is rotatably arranged in the locking plate receiving groove. The locking plate limiting member is located outside the locking plate. The torsion spring is used to drive the lower part of the locking plate to rotate towards the axis direction of the locking sleeve around the shaft rod; When the second sliding seat abuts against the lower limit block of the sliding seat, the locking sleeve is sleeved outside the fixed sleeve. The lower part of the locking plate abuts against the upper part of the outer side surface of the fixed sleeve under the action of the torsion spring, and the locking plate is located above the locking plate receiving groove; when the second sliding seat abuts against the upper limit block of the sliding seat, the fixed sleeve is located above the locking sleeve.

8. The cement-soil pile construction equipment according to claim 1, characterized in that, The high-pressure jet grouting pile machine further includes a rotating seat rotatably arranged on the vehicle frame through a horizontal shaft and a rotating seat rotating actuator for driving the rotating seat to rotate. The support tower rod is fixed on the rotating seat.

9. The cement-soil pile construction equipment according to claim 1, characterized in that, The drill pipe placing rack includes a bottom frame arranged on the installation platform, a rotating bracket rotatably arranged on the bottom frame through a vertical shaft rod, and a rotation driving device for driving the rotating bracket to rotate around the vertical shaft rod. A plurality of vertical insertion holes are circumferentially and uniformly distributed around the vertical shaft rod on the rotating bracket, and the vertical insertion holes are used for inserting the connecting drill pipes of the jet grouting drill pipe.

10. The cement-soil pile construction equipment according to claim 9, characterized in that, The rotating bracket includes an upper installation flat plate and a lower installation flat plate. The vertical insertion holes include polygonal insertion holes arranged on the upper installation flat plate and lower limit holes arranged on the lower installation flat plate.

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