Tunnel fault fracture zone pipe roof

Abstract

The utility model discloses a tunnel fault fracture zone pipe shed, including rock layer, the front of rock layer is provided with the installation pipe shed hole of annular arrangement, and the inner wall of every installation pipe shed hole all has the pipe shed steel pipe of clamping, and the inside of every pipe shed steel pipe all fills with cement mortar layer, and the outer surface of every pipe shed steel pipe all is provided with two groups of equal distance injection hole of arrangement, and the inner wall of the front of every pipe shed steel pipe all is provided with installation thread groove. The device can inject cement slurry into the inside of pipe shed steel pipe through injection head, infiltrate into the inside of rock layer through injection hole, increase the compactness of rock layer, and inject cement mortar layer into the inside of pipe shed steel pipe, form concrete steel bar support shed through the cooperation with reinforcing rib and pipe shed steel pipe, and the effective support of rock layer is convenient, and the effective safe construction work of tunnel fault is convenient.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering construction technology, and in particular to a pipe roof for tunnel fault fracture zones. Background Technology

[0002] In recent years, with the continuous increase in the scale of highway tunnel construction, there have been more and more adverse geological conditions encountered during the construction of tunnel pipe roofs, such as weak surrounding rock, karst, and fault fracture zones. This has led to frequent safety accidents such as water inrush, mudslides, and tunnel collapses. Therefore, in order to increase the safety of tunnel construction, it is necessary to pre-install a row of closely spaced steel pipe systems that form a "shed" or "arch" for protection.

[0003] Current tunnel construction fault support scaffolds have certain shortcomings in their use. They only use steel pipe supports to support the fault and cannot assist in repairing and compacting the fault, thus reducing the supporting effect on the fault and hindering safe construction of tunnel faults. To address these issues, we propose a tunnel fault fracture belt pipe scaffold. Utility Model Content

[0004] The purpose of this invention is to provide a tunnel fault fracture zone pipe roof to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pipe roof for a fault fracture zone in a tunnel includes a rock layer. The rock layer has annularly arranged pipe roof installation holes on its front side. A pipe roof steel pipe is clamped to the inner wall of each installation hole. Each pipe roof steel pipe is filled with a layer of cement mortar. Two sets of equidistant grouting holes are formed on the outer surface of each pipe roof steel pipe. An installation threaded groove is formed on the inner wall of the front end of each pipe roof steel pipe. A sealing cap is threaded to the front end of each pipe roof steel pipe. A grouting connector is fixedly connected to the front end of each sealing cap. A one-way exhaust valve is fixedly embedded in the front end of each sealing cap.

[0007] In a further embodiment, an operating platform is provided at the front end of the rock layer, and a set of anti-slip textures are provided on the upper surface of the operating platform.

[0008] In a further embodiment, a sealing ring is fitted on the outer surface of each sealing cap, and the sealing ring is made of rubber.

[0009] In a further embodiment, each of the steel pipes in the pipe shed is fixedly connected to a reinforcing rib, which is made of metal.

[0010] In a further embodiment, each of the pipe roof steel pipes is fixedly connected to a breaking cone head, which is made of metal.

[0011] In a further embodiment, each of the grouting holes has a diameter of millimeters, and the grouting holes are arranged with a spacing of 20 centimeters.

[0012] In a further embodiment, the inner diameter of the mounting hole is 20-30 mm larger than the outer diameter of the steel pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This device, through its installation pipe roof holes, pipe roof steel pipes, reinforcing ribs, grouting holes, sealing caps, and grouting connectors, allows cement grout to be injected into the pipe roof steel pipes via the grouting connectors. The grout then seeps into the rock layer through the grouting holes, increasing the density of the rock layer and injecting a cement mortar layer into the pipe roof steel pipes. Together with the reinforcing ribs and pipe roof steel pipes, this forms a reinforced concrete support structure, facilitating effective support of the rock layer and ensuring safe and effective construction work on tunnel faults. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the pipe roof in the fault fracture zone of the tunnel.

[0016] Figure 2 This is a side cross-section of the rock strata in the pipe roof of the fault fracture zone of the tunnel.

[0017] Figure 3 This is a three-dimensional structural diagram of the steel pipes in the pipe shed of a tunnel fault fracture zone.

[0018] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the steel pipes in the pipe roof of a tunnel fault fracture zone.

[0019] Figure 5 This is a front view of the steel pipes in the pipe shed of the tunnel fault fracture zone.

[0020] Figure 6 In the tunnel fault fracture zone pipe roof Figure 4 A magnified structural diagram of part A in the middle.

[0021] In the diagram: 1. Rock layer; 2. Operating platform; 21. Anti-slip texture; 3. Pipe shed installation hole; 4. Pipe shed steel pipe; 5. Cement mortar layer; 6. Breaking cone head; 7. Grouting hole; 8. Sealing ring; 9. Sealing cap; 10. One-way exhaust valve; 11. Grouting connector; 12. Reinforcing rib; 13. Installation threaded groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 In this utility model, a pipe roof in a fault fracture zone of a tunnel includes a rock layer 1. The front of the rock layer 1 has annularly arranged pipe roof installation holes 3. A pipe roof steel pipe 4 is clamped to the inner wall of each installation hole 3. The interior of each pipe roof steel pipe 4 is filled with a cement mortar layer 5. The cement mortar layer 5 serves not only as a grouting medium but also fills the interior of the pipe roof steel pipe, playing a dual role: firstly, preventing internal corrosion of the steel pipe and extending its service life; secondly, working together with the internal reinforcing ribs 12, significantly improving the bending and deformation resistance of the steel pipe itself, thereby increasing its load-bearing capacity by approximately [missing information]. With a strength of 25%, it can better cope with the continuous deformation of the strata. The outer surface of each pipe roof steel pipe 4 is provided with two sets of grouting holes 7 arranged at equal distances, which can allow cement mortar to penetrate into the broken rock mass around the steel pipe evenly and in all directions under pressure, realizing three-dimensional grouting and doubling the reinforcement effect. The inner wall of the front end of each pipe roof steel pipe 4 is provided with an installation thread groove 13, and the front end of each pipe roof steel pipe 4 is threaded with a sealing cap 9. The front end of each sealing cap 9 is fixedly connected to a grouting connector 11, which can realize the push-type grouting from the front end of the pipe roof to the end (bottom of the hole). Under pressure, the grout overflows sequentially from each row of grouting holes, effectively expelling air and water from the borehole. This ensures the grout fills the entire borehole and rock fissures, increasing the grout density to over 98% and essentially eliminating reinforcement blind spots. Each sealing cap 9 has a fixed one-way vent valve 10 embedded at its front end. Through the installation threaded groove 13 at the front end and the sealing cap 9, a quick and sealed connection of the grouting pipeline is achieved. Workers do not need to perform complex on-site welding or binding; they only need to tighten the sealing cap 9 and connect the grouting pump to begin grouting. This reduces the grouting preparation time for a single pipe roof from the traditional 15-20 minutes to less than 5 minutes, improving overall construction efficiency by approximately 30%. The one-way vent valve 10 on the sealing cap 9 is a key safety design. During grouting, it allows air and a small amount of groundwater to escape smoothly from the borehole while preventing grout from spraying out. This avoids the risk of the sealing cap 9 bursting open or grout spraying and injuring people due to pressure buildup, reducing the accident rate of grouting operations to near zero.

[0024] An operating platform 2 is provided at the front end of the rock layer 1. The upper surface of the operating platform 2 is provided with a set of anti-slip textures 21, which can support the construction machinery and facilitate the construction operation of the pipe shed. Each sealing cover 9 is fitted with a sealing ring 8 on its outer surface. The sealing ring 8 is made of rubber, which can increase the sealing performance of the sealing cover 9 and prevent the leakage of cement grout. Each pipe shed steel pipe 4 is fixedly connected with a reinforcing rib 12. The reinforcing rib 12 is made of metal, which can increase the support and stability of the cement mortar layer 5 and facilitate the effective support of the pipe shed.

[0025] Each pipe roof steel pipe 4 is fixedly connected to a metal breaking cone 6 at its rear end. The breaking cone 6 assists in the insertion and installation of the pipe roof steel pipe 4. Each grouting hole 7 has a diameter of 10 mm and is arranged at a spacing of 20 cm. Through the equidistant grouting holes 7 with a spacing of 20 cm and a diameter of 10 mm on the pipe roof steel pipe 4, cement mortar can penetrate evenly and comprehensively into the broken rock mass around the steel pipe under pressure. This design transforms the point-like pipe roof support into a continuous "root-like" reinforcement, cementing the loose and broken rock mass into a whole, greatly improving the bearing capacity of the surrounding rock. It is expected to increase the overall stiffness of the support system by more than 40%, realize three-dimensional grouting, and double the reinforcement effect. The inner diameter of the pipe roof installation hole 3 is 20-30 mm larger than the outer diameter of the pipe roof steel pipe 4, which facilitates the insertion of the pipe roof steel pipe 4 into the interior of the installation hole 3.

[0026] The working principle of this utility model is as follows:

[0027] In use, the construction machinery is first moved to the operating platform 2, and the drilling machinery is used to drill holes in the rock layer 1 to form the pipe roof installation hole 3. Then, the pipe roof steel pipe 4 is inserted into the installation hole 3, and the pipe roof steel pipe 4 is pushed by the pipe pusher. Then, the sealing cap 9 is threaded onto the left end of the pipe roof steel pipe 4, and connected to the grouting machinery through the grouting connector 11. Cement grout is injected into the interior of the pipe roof steel pipe 4 and discharged through the grouting hole 7 into the interior of the rock layer 1 to fill the rock layer 1 with concrete. After the filling is completed, cement mortar is injected into the interior of the pipe roof steel pipe 4 to form a concrete steel structure frame, which effectively supports the tunnel fault zone.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipe roof system for tunnel fault fracture zones, characterized in that: The system includes a rock layer (1), on the front of which are arranged in a ring of installation pipe roof holes (3). Each installation pipe roof hole (3) is fitted with a pipe roof steel pipe (4) on its inner wall. Each pipe roof steel pipe (4) is filled with a cement mortar layer (5). Each pipe roof steel pipe (4) has two sets of grouting holes (7) arranged at equal intervals on its outer surface. Each pipe roof steel pipe (4) has an installation thread groove (13) on its front inner wall. Each pipe roof steel pipe (4) has a sealing cap (9) threadedly connected to its front end. Each sealing cap (9) has a grouting connector (11) fixedly connected to its front end. Each sealing cap (9) has a one-way exhaust valve (10) fixedly embedded in its front end.

2. The tunnel fault fracture zone pipe roof according to claim 1, characterized in that: An operating platform (2) is provided at the front end of the rock layer (1), and a set of anti-slip textures (21) are provided on the upper surface of the operating platform (2).

3. The tunnel fault fracture zone pipe roof according to claim 1, characterized in that: Each of the sealing caps (9) has a sealing ring (8) fitted on its outer surface, and the sealing ring (8) is made of rubber.

4. A pipe roof system for tunnel fault fracture zones according to claim 1, characterized in that: Each of the steel pipes (4) in the pipe shed is fixedly connected to a reinforcing rib (12), which is made of metal.

5. A pipe roof for a tunnel fault fracture zone according to claim 1, characterized in that: Each of the steel pipes (4) in the pipe shed is fixedly connected to a breaking cone (6) at its rear end, and the breaking cone (6) is made of metal.

6. A tunnel fault fracture zone pipe roof according to claim 1, characterized in that: Each of the grouting holes (7) has a diameter of 10 mm and the grouting holes (7) are arranged with a spacing of 20 cm.

7. A tunnel fault fracture zone pipe roof according to claim 1, characterized in that: The inner diameter of the installation hole (3) is 20-30 mm larger than the outer diameter of the steel pipe (4).

Images