Rotary jet grouting pile construction device in deep foundation pit engineering

Abstract

The utility model relates to the technical field of building construction, in particular to a jet grouting pile construction device in deep foundation pit engineering. The jet grouting pile construction device in the deep foundation pit engineering comprises a steel pipe, and an inner abutting assembly used for enabling the inner end of the steel pipe to abut against an inner cavity of a pile bottom remaining hole is arranged in the steel pipe. An annular sleeving groove is formed in the outer pipe wall of the middle of the steel pipe, the annular sleeving groove is sleeved with an elastic wrinkled air bag, and a pressing ring used for abutting against the elastic wrinkled air bag is installed on the steel pipe. According to the jet grouting pile construction device in the deep foundation pit engineering, after a steel pipe is inserted into a remaining hole, the pushing rod is pushed inwards to enable the pressing ring to compress the elastic wrinkled air bag, and therefore the elastic wrinkled air bag extends towards the outer ring wall, a gap between the steel pipe and the remaining hole can be quickly blocked, the sealing effect on the remaining hole of a pile body is greatly improved, and the construction efficiency is improved. And meanwhile, under the hooking action of the toothed plate, the steel pipe cannot slip off from the remaining hole.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a rotary jet grouting pile construction device in a deep foundation pit project. Background Art

[0002] Jet grouting is also called rotary jet grouting. The rotary jet pile uses a drilling rig to place the rotary jet grouting pipe and nozzle at the designed elevation of the pile bottom. The pre-prepared cement slurry is passed through a high-pressure generator to give the liquid flow huge energy, and then it is sprayed out at high speed from the nozzle on the side of the grouting pipe to form a highly energy-concentrated liquid flow that directly destroys the soil. During the spraying process, the drill rod rotates and lifts at the same time, so that the cement slurry and the soil are fully mixed and mixed, forming a columnar consolidation body of a certain diameter in the soil, thereby strengthening the foundation;

[0003] When construction workers carry out slag removal construction at the bottom of the pile, they follow the traditional construction process, which can easily cause the sealing to be loose and slag to seep into the remaining holes; traditional tools do not have valves, and the air pressure in the sealing holes is too low, so the sealing tools cannot be pulled out, and the sealing operation is difficult.

[0004] Therefore, it is necessary to provide a new rotary jet grouting pile construction device in deep foundation pit engineering to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a rotary jet grouting pile construction device in deep foundation pit engineering.

[0006] The utility model provides a jet grouting pile construction device in a deep foundation pit project, comprising a steel pipe, wherein an inner abutment component is arranged inside the steel pipe for the inner end of the steel pipe to abut against the inner cavity of the residual hole at the bottom of the pile;

[0007] The inner abutment assembly includes a gear, which is rotatably mounted in the steel pipe through a mounting frame and is located at the insertion end of the steel pipe, and both sides of the gear are meshedly connected with tooth plates, and the two ends of the tooth plates are respectively inserted into the outer sliding holes opened in the steel pipe, and a rotating rod extending from the other end of the steel pipe is fixedly mounted on the gear;

[0008] An annular sleeve groove is provided on the outer tube wall in the middle of the steel tube, and an elastic pleated airbag is sleeved on the annular sleeve groove. A compression ring for abutting against the elastic pleated airbag is installed on the steel tube.

[0009] Preferably, the inner tube walls on both sides of the steel tube insertion end are fixedly installed with limit plates, and the limit protrusions on the two limit plates are respectively inserted into the sliding grooves opened on the back sides of the two tooth plates and are slidably connected to the sliding grooves.

[0010] Preferably, a knob is fixedly mounted on the rotating rod.

[0011] Preferably, an abutment ring is fixedly sleeved on the steel pipe at the bottom of the annular sleeve groove, and the abutment ring is fixedly connected to the bottom bag wall of the elastic pleated airbag.

[0012] Preferably, the compression ring is sleeved on an annular sleeve groove formed on the steel tube and fixedly engaged with the upper bag wall of the elastic pleated airbag.

[0013] Preferably, two symmetrically distributed pushing rods are fixedly mounted on the compression ring.

[0014] Preferably, the two push rods extend out of two threaded through holes provided at the ends of the steel pipe respectively, and a threaded column for rotational connection is installed on the rod head of each push rod.

[0015] Compared with the related art, the rotary jet pile construction device in deep foundation pit engineering provided by the utility model has the following beneficial effects:

[0016] After the steel pipe is inserted into the residual hole, the push rod is pushed inwardly to make the compression ring compress the elastic pleated airbag. Since the inner ring wall of the elastic pleated airbag is restricted by the steel pipe, and the upper and lower sides of the elastic pleated airbag are restricted by the compression ring and the abutment ring, the elastic pleated airbag extends toward the outer ring wall, thereby quickly sealing the gap between the steel pipe and the residual hole, greatly improving the sealing effect of the residual hole of the pile body, and at the same time, under the action of the tooth plate hook, the steel pipe will not slip out of the residual hole. After completion, the threaded column is inserted into the threaded through hole and the thread is tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a preferred embodiment of a rotary jet grouting pile construction device in a deep foundation pit project provided by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the explosion structure shown;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the inner resistance assembly shown;

[0020] Figure 4 for Figure 2 Schematic diagram of the structure of the elastic pleated airbag shown.

[0021] Numbers in the figure: 1, steel pipe; 11, abutment ring; 1a, annular sleeve groove; 1b, outer sliding hole; 1c, threaded through hole; 2, inner abutment assembly; 21, gear; 22, mounting frame; 23, tooth plate; 23a, sliding groove; 24, limit plate; 25, rotating rod; 26, knob; 3, elastic pleated airbag; 4, compression ring; 5, push rod; 6, threaded column. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] See also Figures 1 to 4 The embodiment of the utility model provides a rotary jet grouting pile construction device in a deep foundation pit project, and the rotary jet grouting pile construction device in a deep foundation pit project includes: a steel pipe 1, an inner resistance component 2 and an elastic pleated airbag 3.

[0025] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 and Figure 3 The steel pipe 1 is provided with an inner abutment assembly 2 for the inner end of the steel pipe 1 to abut against the inner cavity of the residual hole at the bottom of the pile, and the inner abutment assembly 2 includes a gear 21, and the gear 21 is rotatably installed in the steel pipe 1 through a mounting frame 22 and is located at the insertion end of the steel pipe 1, and both sides of the gear 21 are meshedly connected with tooth plates 23, and the two ends of the tooth plate 23 are respectively inserted into the outer sliding holes 1b opened in the steel pipe 1, and a rotating rod 25 extending from the other end of the steel pipe 1 is fixedly installed on the gear 21, and a knob 26 is fixedly installed on the rotating rod 25.

[0026] It should be noted that: after the steel pipe 1 is inserted into the residual hole at the bottom of the pile, the knob 26 is rotated to drive the gear 21 to rotate, so that the gear 21 drives the toothed plates 23 on both sides to slide outward along the limit plate 24 toward the outer sliding hole 1b (the two toothed plates 23 slide in opposite directions), so that the toothed plates 23 slide out of the steel pipe 1 to form a hooking structure so that the steel pipe 1 cannot slip out of the residual hole;

[0027] Among them, the inner tube walls on both sides of the inserted end of the steel pipe 1 are fixedly installed with limit plates 24, and the limit protrusions on the two limit plates 24 are respectively inserted into the sliding grooves 23a opened on the back of the two tooth plates 23 and are slidably connected with the sliding grooves 23a, thereby improving the stability of the tooth plate 23 when sliding left and right.

[0028] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 and Figure 4, an annular sleeve groove 1a is provided on the outer tube wall in the middle of the steel tube 1, and an elastic pleated airbag 3 is sleeved on the annular sleeve groove 1a, a pressing ring 4 for abutting against the elastic pleated airbag 3 is installed on the steel tube 1, and an abutting ring 11 is fixedly sleeved on the steel tube 1 at the bottom of the annular sleeve groove 1a, and the abutting ring 11 is fixedly connected to the bottom bag wall of the elastic pleated airbag 3, the pressing ring 4 is sleeved on the annular sleeve groove 1a provided on the steel tube 1 and fixedly embedded in the upper bag wall of the elastic pleated airbag 3, and two symmetrically distributed pushing rods 5 are fixedly installed on the pressing ring 4;

[0029] The two push rods 5 extend out of the two threaded through holes 1c opened at the ends of the steel pipe 1 respectively, and a threaded column 6 for rotational connection is installed on the rod head of each push rod 5.

[0030] It should be noted that: when the steel pipe 1 is inserted into the residual hole, the push rod 5 is pushed inward so that the compression ring 4 compresses the elastic pleated airbag 3. Since the inner wall of the elastic pleated airbag 3 is restricted by the steel pipe 1, and the upper and lower sides of the elastic pleated airbag 3 are restricted by the compression ring 4 and the abutment ring 11, the elastic pleated airbag 3 extends toward the outer wall, thereby quickly blocking the gap between the steel pipe 1 and the residual hole, greatly improving the sealing effect of the residual hole of the pile body, and at the same time, under the hooking action of the tooth plate 23, the steel pipe 1 will not slip out of the residual hole. After completion, the threaded column 6 is inserted into the threaded through hole 1c and the thread is tightened;

[0031] When the steel pipe 1 needs to be removed from the residual hole later, the reverse knob 26 drives the toothed plates 23 on both sides to slide along the limit plate 24 into the outer sliding hole 1b, and then the threaded column 6 is loosened and the push rod 5 is pulled outward to restore the compressed elastic pleated airbag 3 that has been compressed and expanded, and then the steel pipe 1 can be taken out from the residual hole.

[0032] The working principle of the rotary jet pile construction device in the deep foundation pit project provided by the utility model is as follows:

[0033] After the steel pipe 1 is inserted into the residual hole at the bottom of the pile, the knob 26 is rotated to drive the gear 21 to rotate, so that the gear 21 drives the tooth plates 23 on both sides to slide along the limit plates 24 to the outer sliding holes 1b (the two tooth plates 23 slide in opposite directions), so that the tooth plates 23 slide out of the steel pipe 1 to form a hooking structure so that the steel pipe 1 cannot slip out of the residual hole. When the steel pipe 1 is inserted in the residual hole, the push rod 5 is pushed inward to make the pressing ring 4 compress the elastic pleated airbag 3. Since the inner ring wall of the elastic pleated airbag 3 is restricted by the steel pipe 1, and the upper and lower sides of the elastic pleated airbag 3 are restricted by the pressing ring 4 and the abutting ring 11, the elastic pleated airbag 3 extends toward the outer ring wall, so that the gap between the steel pipe 1 and the residual hole can be quickly blocked, which greatly improves the sealing effect of the residual hole of the pile body. At the same time, under the hooking action of the tooth plate 23, the steel pipe 1 will not slip out of the residual hole. After completion, the threaded column 6 is inserted into the threaded through hole 1c and the thread is tightened;

[0034] When the steel pipe 1 needs to be removed from the residual hole later, the reverse knob 26 drives the toothed plates 23 on both sides to slide along the limit plate 24 into the outer sliding hole 1b, and then the threaded column 6 is loosened and the push rod 5 is pulled outward to restore the compressed elastic pleated airbag 3 that has been compressed and expanded, and then the steel pipe 1 can be taken out from the residual hole.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A jet grouting pile construction device in a deep foundation pit project, characterized in that: It comprises a steel pipe (1), wherein an inner abutment assembly (2) is arranged inside the steel pipe (1) and is used for the inner end of the steel pipe (1) to abut against the inner cavity of the residual hole at the bottom of the pile; The inner abutment assembly (2) comprises a gear (21), the gear (21) being rotatably mounted in the steel pipe (1) via a mounting frame (22) and being located at the insertion end of the steel pipe (1), and both sides of the gear (21) being meshingly connected with tooth plates (23), the two ends of the tooth plates (23) being respectively inserted into the outer sliding holes (1b) opened in the steel pipe (1), and a rotating rod (25) extending from the other end of the steel pipe (1) being fixedly mounted on the gear (21); An annular sleeve groove (1a) is provided on the outer tube wall in the middle of the steel tube (1), and an elastic pleated airbag (3) is sleeved on the annular sleeve groove (1a), and a compression ring (4) for abutting against the elastic pleated airbag (3) is installed on the steel tube (1).

2. The rotary jet grouting pile construction device in deep foundation pit engineering according to claim 1, characterized in that: Limiting plates (24) are fixedly mounted on the inner tube walls on both sides of the insertion end of the steel tube (1), and the limiting protrusions on the two limiting plates (24) are respectively inserted into the sliding grooves (23a) provided on the backs of the two tooth plates (23) and are slidably connected to the sliding grooves (23a).

3. The rotary jet grouting pile construction device in deep foundation pit engineering according to claim 2, characterized in that: A knob (26) is fixedly mounted on the rotating rod (25).

4. The rotary jet grouting pile construction device in deep foundation pit engineering according to claim 1, characterized in that: An abutment ring (11) is fixedly sleeved on the steel pipe (1) at the bottom of the annular sleeve groove (1a), and the abutment ring (11) is fixedly connected to the bottom bag wall of the elastic pleated airbag (3).

5. The rotary jet grouting pile construction device in deep foundation pit engineering according to claim 4, characterized in that: The compression ring (4) is sleeved on the annular sleeve groove (1a) provided on the steel pipe (1) and fixedly engaged with the upper bag wall of the elastic pleated air bag (3).

6. The rotary jet grouting pile construction device in deep foundation pit engineering according to claim 5, characterized in that: Two symmetrically distributed pushing rods (5) are fixedly mounted on the compression ring (4).

7. The rotary jet grouting pile construction device in deep foundation pit engineering according to claim 6, characterized in that: The two push rods (5) respectively extend out of two threaded through holes (1c) provided at the ends of the steel pipe (1), and a threaded column (6) for rotational connection is mounted on the rod head of each push rod (5).

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