Tunnel deep hole grouting device for enhancing anchoring slip resistance effect

Abstract

The utility model relates to the field of tunnel deep hole construction technology, concretely relates to a tunnel deep hole grouting device of reinforced anchoring resistance to slip effect, the device includes steel flower pipe body, steel flower pipe body is by top pipe section, bottom pipe section and at least one middle pipe section is composed, each pipe section is connected through the enhanced pipe cover device screw thread, the round table seat side wall of enhanced pipe cover device is equipped with telescopic anchoring rod, and anchoring rod contains telescopic rod, anchoring head, piston and spring, and the inner end of radial direction guide hole is equipped with elastic film, and still can be equipped with modular anchoring unit. The device can be through grouting or inflation pressure to trigger anchoring rod to stretch out, realizes active anchoring, and the segmented structure adapts deep hole construction simultaneously, and the double trigger mechanism adapts complex working condition, significantly improves anchoring resistance to slip performance, guarantees tunnel construction and operation stability.

Description

Technical Field

[0001] This utility model relates to the field of deep hole tunnel construction technology, specifically to a deep hole tunnel grouting device that enhances the anchoring and anti-slip effect. Background Technology

[0002] In the field of tunnel construction, reinforcement of the surrounding rock and soil is crucial to ensure construction safety and long-term structural stability. Grouting technology is one of the core methods to achieve this goal. By injecting grouts such as mud or cement grout into the surrounding rock or soil, the gaps in the medium can be effectively filled and the overall density can be improved. This not only significantly enhances the tunnel structure's resistance to risks but also blocks the path of water infiltration, preventing leakage from causing erosion and damage to the tunnel structure. In specific grouting operations, construction personnel must first precisely drill several grouting holes along the circumferential and radial directions on the inner wall of the tunnel according to the engineering design requirements, and then complete the grouting operation of each grouting hole in a predetermined sequence. When facing construction areas with complex and harsh geological conditions, or key parts that require the pre-construction of support systems, the industry generally adopts a reinforcement scheme of drilling grouting holes first, then installing steel pipes, and then carrying out grouting. Moreover, after the grouting operation is completed, the steel pipes will remain permanently inside the rock strata. Their core function is to achieve an anchoring effect through their own structure and to form resistance to rock strata sliding, thereby improving the overall safety and stability coefficient of the rock strata and providing a guarantee for tunnel construction and subsequent operation. However, a key contradiction exists in the above process: to facilitate the smooth insertion of the steel pipe into the pre-drilled grouting holes, its outer surface is usually processed to be smooth. While this design solves the problem of ease of installation, it directly leads to a significant reduction in the friction between the steel pipe and the surrounding rock strata, greatly diminishing the anchoring performance and anti-slip effect that the steel pipe should possess, making it difficult to fully meet the reinforcement and stability requirements of tunnel engineering. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a tunnel deep hole grouting device that enhances the anchoring and anti-slip effect, aiming to solve the problem of insufficient anchoring and anti-slip effect of traditional steel pipe grouting.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A tunnel deep hole grouting device for enhancing anchoring and anti-slip effect includes a steel flower pipe body, which includes a top pipe section, a bottom pipe section and one or more middle pipe sections. The top pipe section, middle pipe section and bottom pipe section are all fixedly connected by threaded connection through a reinforcing pipe sleeve device. The reinforced casing device includes a casing body, which is provided with a frustum base. The sidewall of the frustum base is evenly distributed with multiple retractable anchor rods for extending after deep hole grouting.

[0005] Preferably, the sidewall of the truncated cone is provided with a plurality of radial guide holes evenly spaced apart. A telescopic rod is provided in the radial guide hole. An anchor head is provided at the outer end of the telescopic rod and a piston adapted to the radial guide hole is provided at the inner end. A spring is fitted onto the telescopic rod, and a limiting plate for limiting the spring is provided on the radial guide hole near the outer end. An elastic membrane is fixedly installed at the inner end of the radial guide hole for sealing and for pushing the piston outward when it undergoes elastic deformation under fluid pressure.

[0006] Preferably, the inner end of the radial guide hole is provided with a streamlined inlet near the piston to accommodate the deformation of the elastic membrane.

[0007] Preferably, the radial guide hole is formed on the anchoring unit, and the side wall of the truncated cone base is provided with mounting holes for mounting the anchoring unit.

[0008] Preferably, the anchoring unit is also provided with an operation hole for easy operation.

[0009] Preferably, the top end of the top pipe section is used to connect the joint and the air inlet of the grouting equipment.

[0010] Preferably, the lower inner wall of the bottom pipe section is provided with a limiting port for limiting the sealing ball placed inside the pipe.

[0011] This utility model has at least the following beneficial effects: This invention features retractable anchor rods mounted on a frustum-shaped base of a reinforced pipe sleeve device. Combined with a fluid pressure-triggered extension and retraction mechanism, the anchor rods actively extend and embed themselves into the rock strata during or after grouting operations, forming a multi-point, distributed mechanical interlocking structure. Compared to the passive anchoring method of traditional smooth-surface steel pipes that relies solely on the natural fit between the pipe body and the borehole wall, this invention's active anchoring design significantly enhances the connection strength between the steel pipe and the surrounding rock, effectively increasing resistance to rock slippage. It can fully adapt to reinforcement needs under complex geological conditions such as high ground stress and fractured surrounding rock, providing reliable assurance for safety during tunnel construction and long-term structural stability during operation.

[0012] This utility model designs the steel pipe body as a segmented structure with a top section, a middle section and a bottom section. Each section is fixed by threaded connection through a reinforced pipe sleeve device. This not only solves the problem of the difficulty of transporting and inserting the traditional whole steel pipe in deep hole construction, but also allows for flexible increase or decrease of the number of middle sections according to the depth of the grouting hole, adapting to the depth requirements of different engineering scenarios.

[0013] In this utility model, the anchor rod adopts a modular anchor unit design. The anchor unit is installed in the mounting hole of the truncated cone base by thread and is provided with an operation hole for easy tool operation. This not only reduces the complexity and cost of molds during production and manufacturing, but also facilitates on-site installation and replacement. It avoids the waste of scrapping the entire steel pipe due to the damage of a single component, and significantly improves production and construction efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall internal structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall three-dimensional disassembled structure of this utility model.

[0016] Figure 3 A schematic diagram of the internal structure of the reinforced tubing device.

[0017] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0018] Figure 5 This is a schematic diagram of the internal structure of the bottom pipe section.

[0019] Figure 6 A schematic diagram of the external structure of the reinforced tubing assembly.

[0020] The reference numerals in the attached drawings are as follows: 100, top pipe section; 200, reinforcing pipe sleeve device; 210, truncated cone base; 220, anchoring unit; 221, radial guide hole; 222, telescopic rod; 223, limiting plate; 224, piston; 225, spring; 226, elastic membrane; 227, inlet; 300, middle pipe section; 400, bottom pipe section; 410, limiting port; 420, sealing ball. Detailed Implementation

[0021] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figures 1 to 6 A tunnel deep hole grouting device for enhancing anchoring and anti-slip effect is presented, comprising a steel flower pipe body, wherein the steel flower pipe body comprises a top pipe section 100, a bottom pipe section 400 and one or more middle pipe sections 300, wherein the top pipe section 100, the middle pipe section 300 and the bottom pipe section 400 are all fixedly connected by a reinforcing pipe sleeve device 200 through threaded connection. The reinforced sleeve device 200 includes a sleeve body, which is provided with a frustum 210. The frustum 210 has multiple retractable anchor rods evenly distributed on its side wall, which are used to extend after deep hole grouting to achieve anchoring and anti-slip functions.

[0023] Regarding the specific extension and retraction of the anchor rod, this embodiment provides the following explanation: The frustum base 210 has multiple radial guide holes 221 evenly spaced on its sidewall. A telescopic rod 222 is installed within each radial guide hole 221. An anchor head is provided at the outer end of each telescopic rod 222, and a piston 224 adapted to the radial guide hole 221 is provided at its inner end. A spring 225 is fitted onto the telescopic rod 222, and a limiting plate 223 for limiting the spring 225 is provided near the outer end of the radial guide hole 221. Thus, the structure of the elastic piston 224 is complete. The method for pushing the piston 224, while avoiding interference with the normal operation of the piston 224 and the radial guide hole 221, is explained in this embodiment as follows: An elastic membrane 226 is fixedly installed at the inner end of the radial guide hole 221 for sealing and for pushing the piston 224 outward when it undergoes elastic deformation under fluid pressure. Thus, during normal pouring in the dry tempered pipe, the fluid passes normally through the elastic membrane 226. As pouring progresses, the pressure gradually increases, causing the pouring fluid to push the elastic membrane 226 to deform, thereby entering the radial guide hole 221 and pushing the piston 224 outward. This, in turn, drives the telescopic rod 222 and its anchoring head outward to complete the anchoring.

[0024] In order to accommodate the deformation of the elastic membrane 226 and facilitate its entry into the radial guide hole 221, the inner end of the radial guide hole 221 is provided with a streamlined inlet 227 on the side near the piston 224.

[0025] To improve production and installation efficiency, this embodiment also incorporates a modular design for the anchor rod, namely, an anchor unit 220. The radial guide hole 221 is formed on the anchor unit 220, and the side wall of the frustum base 210 is provided with an installation hole for mounting the anchor unit 220, which can be a threaded hole. The anchor unit 220 is threadedly installed in the installation hole.

[0026] To facilitate the installation of the anchoring unit 220, the anchoring unit 220 is also provided with an operation hole for easy operation, so that tools can be used to lock and rotate it.

[0027] To better implement this application, other preparations have been made in this embodiment, namely, when the pressure of the grouting fluid cannot achieve the above-mentioned effect, it can be operated in the following manner: The top of the top pipe section 100 may be provided with a threaded hole for connecting the joint and the air inlet of the grouting equipment. The lower inner wall of the bottom pipe section 400 is provided with a limiting port 410 for limiting the sealing ball 420 placed inside the pipe.

[0028] During the pouring process, the joint of the pouring equipment is installed. After the pouring is completed, the sealing ball 420 is first placed into the pipe, and then the air-filled joint is replaced. When the sealing ball 420 falls to the limit port 410, it is stopped and stops falling, and the limit port 410 is blocked. At this time, the pipe is inflated, which causes the elastic membrane 226 to push the piston 224 outward, thereby driving the telescopic rod 222 and its anchoring head to move outward to complete the anchoring.

[0029] This application designs a dual anchoring triggering method for different grouting conditions: Under normal geological conditions, when the grout pressure reaches a threshold during grouting, it can directly push the elastic membrane 226 to deform, thereby driving the anchor rod to extend and complete the anchoring, achieving "simultaneous grouting and anchoring" without additional procedures; Under special geological conditions where the grout viscosity is low and the grouting pressure is insufficient due to hole wall leakage, an air-filled connector can be connected through the threaded hole of the top pipe section 100 to inflate the pipe and use the air pressure to push the elastic membrane 226, ensuring the reliable extension of the anchor rod. This dual triggering mechanism effectively avoids the problem of single triggering methods being prone to failure under complex conditions, improves the adaptability of the device to different geological environments and the construction fault tolerance rate, and ensures the stability of the anchoring effect.

[0030] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0031] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this utility model, are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect, comprising a steel perforated pipe body, characterized in that: The steel pipe body includes a top pipe section, a bottom pipe section, and one or more middle pipe sections. The top pipe section, middle pipe section, and bottom pipe section are all connected and fixed by threaded connection through a reinforced pipe sleeve device. The reinforced casing device includes a casing body, which is provided with a frustum base. The sidewall of the frustum base is evenly distributed with multiple retractable anchor rods for extending after deep hole grouting.

2. The tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect as described in claim 1, characterized in that: The sidewall of the truncated cone is provided with a plurality of radial guide holes evenly spaced apart. A telescopic rod is provided in the radial guide hole. An anchor head is provided at the outer end of the telescopic rod and a piston adapted to the radial guide hole is provided at the inner end. A spring is fitted onto the telescopic rod, and a limiting plate for limiting the spring is provided on the radial guide hole near the outer end. An elastic membrane is fixedly installed at the inner end of the radial guide hole for sealing and for pushing the piston outward when it undergoes elastic deformation under fluid pressure.

3. The tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect as described in claim 2, characterized in that: The inner end of the radial guide hole, near the piston, is designed as a streamlined inlet to accommodate the deformation of the elastic membrane.

4. The tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect as described in claim 2, characterized in that: The radial guide hole is formed on the anchoring unit, and the side wall of the truncated cone base is provided with mounting holes for installing the anchoring unit.

5. The tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect as described in claim 4, characterized in that: The anchoring unit is also provided with an operation hole for easy operation.

6. The tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect as described in any one of claims 1 to 5, characterized in that: The top end of the top pipe section is used to connect the grouting equipment's connector and air inlet connector.

7. The tunnel deep-hole grouting device for enhancing anchoring and anti-slip effect as described in claim 6, characterized in that: The lower inner wall of the bottom pipe section is provided with a limiting port for limiting the sealing ball placed inside the pipe.

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