Miniature pipe jacking construction reinforcing part and hole reinforcing structure after miniature pipe jacking construction
By using the base plate and bite arm reinforcements in micro pipe jacking construction, the problem of soil collapse at the junction of the pipe jacking channel and the prefabricated well is solved, thereby improving construction safety and structural safety.
Patent Information
- Application Number
- CN202420495718.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-03-14
AI Technical Summary
In the construction of micro-pipe hoisting, mud and water entering and loosening of soil are prone to occur at the junction of the pipe passage and the pre-built well, resulting in the collapse of the soil around the last section of the pipe, affecting the tight elevation of the pipe section and the safety of soil support.
A micro pipe jacking construction reinforcement is provided, which includes a base plate and a bite arm fixed on the base plate. Through the forward tilt plate, backward tilt plate and bite teeth of the bite arm, the soil environment of the pipe jacking channel is stabilized and fixed to avoid falling off. Collapse.
By stabilizing and fixing the soil environment of the pipe jacking channel, soil collapse is avoided, ensuring the safety and continuity of micro pipe jacking construction, and improving the structural safety of the pipe jacking channel opening.
Smart Images
Figure CN222376496U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of micro-pipe jacking construction, and specifically relates to a micro-pipe jacking construction reinforcement piece and a micro-pipe jacking construction rear hole reinforcement structure. Background Art
[0002] Micro pipe jacking construction is a commonly used construction method in municipal pipeline projects. Micro pipe jacking construction has many advantages, such as being able to be carried out without damaging surface vegetation and the surrounding environment, and being able to be carried out in a small space. The basic principle is to use pipe jacking equipment to push the pipeline into the soil section by section, continuously cutting the soil during the jacking process and discharging it outside the pipe until the jacked pipeline reaches the predetermined position.
[0003] In micro-pipe jacking construction, since the diameter of micro-pipe jacking is smaller than that of ordinary pipe jacking construction, the length of pipe sections is generally shorter. When the jacking channel begins to be excavated and after it is dug through, the junction of the jacking channel and the pre-built well opening often causes soil collapse around the last section of the pipe due to mud and water entering the well chamber and loosening of soil outside the well. Since the jacking force of micro-pipe jacking is generally small, pouring the hole first is not conducive to micro-pipe jacking construction, which makes the soil and rock at this location further loosened each time a new pipe section is jacked in, affecting the tight jacking construction of the pipe section and the safety of the soil support at this location. Utility Model Content
[0004] The utility model aims to provide a micro-pipe jacking construction reinforcement member, so as to realize the micro-pipe jacking construction more conveniently and be beneficial to the structural safety of the opening of the jacking pipe channel.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro-jacking pipe construction reinforcement member, including a base plate and an occlusal arm fixed on the base plate, the base plate is provided with a central through hole, the occlusal arm is provided with a plurality of occlusal arms and is arranged on the inner wall of the central through hole of the base plate at intervals along the circumferential direction, the back side of the base plate is a fitting fixing surface adapted to the inner wall of the pre-built well, the base plate is provided with connecting through holes for connecting and fixing with the inner wall of the pre-built well at intervals along the circumferential direction, the free end of the occlusal arm is extended toward the rear of the base plate, and the occlusal arm includes a forward tilting plate, a rear tilting plate and a bite tooth One end of the forward tilting plate is connected to the inner wall of the central through hole of the base, and the other end of the forward tilting plate is fixedly connected to one end of the rearward tilting plate; the inner side walls of the bite arm are combined to form a pipe joint fixing channel, and the inner diameter of the pipe joint fixing channel formed by the forward tilting plate decreases from front to back, and the inner diameter of the pipe joint fixing channel formed by the rearward tilting plate increases from front to back; the bite teeth are convexly arranged on the side of the bite arm facing away from the pipe joint fixing channel, and the bite teeth are located at the part where the bite arm extends out of the end surface of the base; the forward tilting plate and the rearward tilting plate can undergo plastic deformation after contacting the outer wall of the pipe joint.
[0006] Preferably, the biting teeth are arranged at one end of the front tilting plate close to the rear tilting plate, and the biting teeth are located on both sides of the front tilting plate.
[0007] Preferably, the bite teeth are formed by bending the edge of the rake plate by 90 degrees.
[0008] On the basis of the micro-jacking pipe construction reinforcement member described above, the utility model provides a micro-jacking pipe construction post-hole reinforcement structure with a simple and reliable structure, including a pre-built well, a jacking pipe channel and a pipe segment. The two pre-built wells are connected to each other through the jacking pipe channel at the inner wall position, and the pipe segment is arranged in the jacking pipe channel. The inner walls of the two pre-built wells are fixedly installed with the micro-jacking pipe construction reinforcement member described above at the port position of the jacking pipe channel. The central through hole of the base plate is aligned with the port of the jacking pipe channel, and the inner diameter of the central through hole of the base plate is larger than the inner diameter of the jacking pipe channel. The base plate is fixed to the inner wall of the pre-built well by fasteners through the connecting through hole. The outer wall of the pipe segment forms a surface contact with the inner wall of the pipe segment fixing channel formed by the forward inclined plate and the rear inclined plate. The side of the forward inclined plate and the rear inclined plate facing away from the axis of the pipe segment fits with the soil layer on the outer periphery of the jacking pipe channel, and the biting teeth are embedded in the soil layer on the outer periphery of the jacking pipe channel.
[0009] Preferably, a mounting plate is stacked on the side of the base plate facing the center of the pre-built well, the mounting plate and the base plate are connected and fixed by a second fastener, the mounting plate is provided with a center hole coaxial with the center through hole of the base plate, a closing ring is fixed on the inner wall of the center hole of the mounting plate, the closing ring serves as an axial limiting function for the end of the pipe segment, and the inner ring diameter of the closing ring is not less than the inner diameter of the pipe segment.
[0010] The beneficial effects of the utility model are as follows: the reinforcement structure of the utility model is installed in the pre-built well through the base plate, and the bite arm provided on the base plate is extended from the hole into the jacking channel, and the shield excavator head or pipe section in the jacking construction is used to push the forward and rearward inclined plates to both sides, so that the forward and rearward inclined plates are attached to the soil layer around the hole and the bite teeth are buckled to the surrounding soil layer, thereby stabilizing the soil environment around the hole at the front and rear holes of the jacking channel to avoid falling off and collapse. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a three-dimensional structural schematic diagram of the implementation of the utility model (only one of the holes is shown).
[0012] Figure 2 It is a three-dimensional structural schematic diagram of the micro-pipe jacking construction reinforcement member described in the utility model.
[0013] Figure 3 It is a schematic diagram of the cross-sectional structure when the utility model is implemented.
[0014] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at A in the figure.
[0015] Figure 5 It is a three-dimensional structural schematic diagram of the installation plate and the closing ring in cooperation with the base plate of the utility model.
[0016] Parts markings in the figure: 1-base plate; 2-bite arm; 3-mounting plate; 4-closing ring; 5-pre-built well; 6-jacking pipe channel; 7-pipe section; 11-connecting through hole; 21-forward tilting plate; 22-rearward tilting plate; 23-biting tooth. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-Figure 5 The micro-jacking pipe construction reinforcement member described in the utility model includes a base plate 1 and an occlusal arm 2 fixed on the base plate 1, the base plate 1 is provided with a central through hole, the occlusal arm 2 is provided with a plurality of occlusal arms 2 and arranged on the inner wall of the central through hole of the base plate 1 at intervals along the circumferential direction (the occlusal arms 2 are preferably arranged at uniform intervals), the back side of the base plate 1 is a fitting and fixing surface adapted to the inner wall of the pre-built well 5, the base plate 1 is provided with connecting through holes 11 for connecting and fixing to the inner wall of the pre-built well 5 at intervals along the circumferential direction (the connecting through holes 11 are preferably arranged at uniform intervals), the free end of the occlusal arm 2 extends toward the rear of the base plate 1, the occlusal arm 2 includes a forward tilting plate 21, a rear tilting plate 22 and a bite tooth 23, one end of the forward tilting plate 21 is connected to the inner wall of the central through hole of the base plate 1, the front The other end of the tilting plate 21 is fixedly connected to one end of the rear tilting plate 22; the inner side wall combination of the bite arm 2 constitutes a pipe segment fixing channel, the inner diameter of the pipe segment fixing channel formed by the front tilting plate 21 decreases from front to back, and the inner diameter of the pipe segment fixing channel formed by the rear tilting plate 22 increases from front to back. It can be understood that the front and back here are relative to the base plate 1, the front end of the front tilting plate 21 is the end connected to the base plate 1, and the front end of the rear tilting plate 22 is the end connected to the front tilting plate 21; the bite teeth 23 are convexly arranged on the side of the bite arm 2 facing away from the pipe segment fixing channel, and the bite teeth 23 are located at the part of the bite arm 2 extending out of the end surface of the base plate 1; the front tilting plate 21 and the rear tilting plate 22 can undergo plastic deformation after contacting the outer wall of the pipe segment 7. The main function of the bite teeth 23 is to embed into the soil layer after the front tilting plate 21 and the rear tilting plate 22 undergo plastic deformation to ensure the reliability of the overall structure. It is understandable that before the forward tilting plate 21 and the rearward tilting plate 22 produce plastic deformation, the biting tooth 23 needs to extend normally into the hole of the top pipe channel 6 along with the engaging arm 2. Therefore, the radial distance from the tip of the biting tooth 23 to the central axis of the base plate 1 is smaller than the radius of the top pipe channel.
[0019] The bite arm 2 can be made of conventional materials with certain strength and plastic deformation, generally various metal materials such as iron, steel, etc. The base plate 1 can generally be made of the same metal material as the bite arm 2 .
[0020] In order to facilitate the normal extension of the biting teeth 23 into the hole of the top pipe channel 6 along with the bite arm 2, the biting teeth 23 are generally arranged at the position where the front tilting plate 21 and the rear tilting plate 22 are connected. Before the front tilting plate 21 and the rear tilting plate 22 produce plastic deformation, the original inner diameter of the pipe segment fixing channel corresponding to this connection node is the smallest. In this embodiment, it is preferred to set the biting teeth 23 at one end of the front tilting plate 21 close to the rear tilting plate 22. In order to achieve a better connection and fixing effect, the biting teeth 23 are arranged on both sides of the front tilting plate 21. For ease of processing, the biting teeth 23 can be formed by bending the edge of the front tilting plate 21 by 90°. It can be understood that in some alternative embodiments, the biting teeth 23 can also be fixed to a suitable position on the bite arm 2 by welding.
[0021] On the basis of the above-mentioned micro-jacking pipe construction reinforcement member, the utility model provides a micro-jacking pipe construction post-hole reinforcement structure, including a pre-built well 5, a jacking pipe channel 6 and a pipe section 7. The two pre-built wells 5 are connected to each other through the jacking pipe channel 6 at the inner wall position. The pipe section 7 is arranged in the jacking pipe channel 6. The inner walls of the two pre-built wells 5 are fixedly installed with the above-mentioned micro-jacking pipe construction reinforcement member at the port position of the jacking pipe channel 6. The central through hole of the base plate 1 is aligned with the port of the jacking pipe channel 6, and the inner diameter of the central through hole of the base plate 1 is larger than the inner diameter of the jacking pipe channel 6. The base plate 1 is fixed to the inner wall of the pre-built well 5 by a fastener and a connecting through hole 11. The fastener can generally be used. In the form of bolts or anchor bolts, after the pipe segment 7 is installed, the forward tilting plate 21 and the rearward tilting plate 22 have undergone plastic deformation (the deformation parts are generally the parts where the forward tilting plate 21 and the base plate 1 are connected and the connecting parts of the forward tilting plate 21 and the rearward tilting plate 22). At this time, the outer wall of the pipe segment 7 forms a surface contact with the inner wall of the pipe segment fixing channel formed by the forward tilting plate 21 and the rearward tilting plate 22, and the side of the forward tilting plate 21 and the rearward tilting plate 22 facing away from the axis of the pipe segment 7 fits with the soil layer on the periphery of the jacking channel 6, and the biting teeth 23 are embedded in the soil layer on the periphery of the jacking channel 6, thereby stabilizing the soil environment around the two front and rear openings of the jacking channel 6 to avoid falling off and collapse.
[0022] In order to make the fixing structure of the pipe segment 7 more reliable, the preferred solution is that a mounting plate 3 is stacked on the side of the base plate 1 facing the center of the pre-built well 5, and the mounting plate 3 and the base plate 1 are connected and fixed by a second fastener. The mounting plate 3 is provided with a center hole coaxial with the center through hole of the base plate 1, and a closed ring 4 is fixed on the inner wall of the center hole of the mounting plate 3. The closed ring 4 plays an axial limiting role on the end of the pipe segment 7 (that is, the inner ring diameter of the closed ring 4 is smaller than the outer diameter of the pipe segment 7), and the inner ring diameter of the closed ring 4 is not smaller than the inner diameter of the pipe segment 7 (that is, it does not block the internal channel of the pipe segment 7). The second fastener can generally be in the form of a bolt. In a preferred embodiment, the base plate 1 can reserve a part of the connecting through hole 11 to connect and fix the mounting plate 3.
[0023] When the utility model is implemented in detail, it can generally be implemented according to the following steps: starting from the pre-built well 5 at the starting end, digging a top pipe channel 6 towards the pre-built well 5 at the ending end, after the shield excavator head digs out the entrance of the top pipe channel 6, the pipe segment 7 drives the shield excavator head to extend further, and drives the pipe segment 7 pushed forward by the shield excavator head to be pulled out after being pushed forward by a length sufficient to engage the bite arm 2. Since the length of the bite arm 2 is extremely short compared with the pipe segment 7, a rope is added to the front section of the jack for pushing the pipe segment 7 so that the pipe segment 7 can be easily pulled out, and then the base plate 1 is installed on the inner wall of the pre-built well 5 at the entrance of the top pipe channel 6 through the connecting through hole 11 by means of a fastener, and then the pipe segment 7 is pushed in again, and the front and rear inclined plates 21 and 22 are pushed open toward the outer peripheral side by using the pipe segment 7 to contact the front inclined plate 21, so that the front and rear inclined plates 21 and 22 are attached to the periphery of the hole. The shield excavator head 21 is placed on the soil layer and the teeth 23 are allowed to hold the surrounding soil layer. On the other side, after the shield excavator head digs through the exit of the jacking channel 6, the pipe segment 7 pushes the shield excavator head out. Since the shield excavator head is heavy, it will fall out of the hole before it is completely pushed out. At this time, there is still a distance between the pipe segment 7 and the exit. Then, the base plate 1 is installed on the inner wall of the pre-built well 5 at the exit of the jacking channel 6 through the connecting through hole 11 with the fastener. The pipe segment 7 is further pushed in and contacts the rear tilting plate 22, and the rear tilting plate 22 is pushed up to the outer peripheral side, so that the front tilting plate 21 and the rear tilting plate 22 are attached to the soil layer around the hole, and the teeth 23 are allowed to hold the surrounding soil layer. Compared with the front reinforcement structure of the pipeline in ordinary jacking construction, the simple reinforcement operation after the jacking operation starts is more suitable for micro jacking construction. After the above construction is completed, the fixing installation plate 3 is finally connected.
Claims
1. Micro-pipe jacking construction reinforcement, characterized by: The invention comprises a base plate (1) and an occlusal arm (2) fixed on the base plate (1), wherein the base plate (1) is provided with a central through hole, and the occlusal arm (2) is provided with a plurality of occlusal teeth (23) arranged at intervals along the circumferential direction on the inner wall of the central through hole of the base plate (1), the back side of the base plate (1) is a fitting and fixing surface adapted to the inner wall of the pre-built well (5), and the base plate (1) is provided with connecting through holes (11) for connecting and fixing with the inner wall of the pre-built well (5) at intervals along the circumferential direction, and the free end of the occlusal arm (2) is extended toward the rear of the base plate (1), and the occlusal arm (2) comprises a forward tilting plate (21), a rear tilting plate (22) and a bite tooth (23), and one end of the forward tilting plate (21) is connected to the base plate (1). On the inner wall of the central through hole of the disk (1), the other end of the forward tilting plate (21) and one end of the rearward tilting plate (22) are fixedly connected; the inner side walls of the bite arm (2) are combined to form a pipe joint fixing channel, the inner diameter of the pipe joint fixing channel formed by the forward tilting plate (21) decreases from front to back, and the inner diameter of the pipe joint fixing channel formed by the rearward tilting plate (22) increases from front to back; the bite teeth (23) are protrudingly arranged on the side of the bite arm (2) facing away from the pipe joint fixing channel, and the bite teeth (23) are located at the part of the bite arm (2) extending outside the end surface of the base disk (1); the forward tilting plate (21) and the rearward tilting plate (22) can undergo plastic deformation after contacting the outer wall of the pipe joint (7).
2. The micro-pipe jacking construction reinforcement member according to claim 1, characterized in that: The biting teeth (23) are arranged at one end of the front tilting plate (21) close to the rear tilting plate (22), and the biting teeth (23) are located on both sides of the front tilting plate (21).
3. The micro-pipe jacking construction reinforcement member according to claim 2, characterized in that: The biting teeth (23) are formed by bending the edge of the forward tilting plate (21) by 90 degrees.
4. A hole reinforcement structure after micro-pipe jacking construction, comprising a pre-built well (5), a pipe jacking channel (6) and a pipe section (7), wherein two pre-built wells (5) are interconnected at the inner wall position through the pipe jacking channel (6), and the pipe section (7) is arranged in the pipe jacking channel (6), characterized in that: The inner walls of the two pre-built wells (5) are fixedly installed with a micro-jacking construction reinforcement member as described in any one of claims 1 to 3 at the port position of the jacking channel (6), the central through hole of the base plate (1) is aligned with the port of the jacking channel (6), and the inner diameter of the central through hole of the base plate (1) is larger than the inner diameter of the jacking channel (6), the base plate (1) is fixed to the inner wall of the pre-built well (5) by fasteners and connecting through holes (11), the outer wall of the pipe segment (7) is in surface contact with the inner wall of the pipe segment fixing channel formed by the forward inclined plate (21) and the rearward inclined plate (22), the side of the forward inclined plate (21) and the rearward inclined plate (22) facing away from the axis of the pipe segment (7) is in contact with the soil layer on the outer periphery of the jacking channel (6), and the biting teeth (23) are embedded in the soil layer on the outer periphery of the jacking channel (6).
5. The micro-pipe jacking post-construction hole reinforcement structure according to claim 4, characterized in that: A mounting plate (3) is stacked on one side of the base plate (1) facing the center of the pre-built well (5); the mounting plate (3) and the base plate (1) are connected and fixed by a second fastener; the mounting plate (3) is provided with a center hole coaxial with the center through hole of the base plate (1); a closing ring (4) is fixedly provided on the inner wall of the center hole of the mounting plate (3); the closing ring (4) plays an axial limiting role on the end of the pipe segment (7); and the inner ring diameter of the closing ring (4) is not less than the inner diameter of the pipe segment (7).