Anti-caving support frame for fault fracture zone

Abstract

The utility model discloses a fault broken zone anticollapse support frame, including two arcuate steel frames, the bottom of each arcuate steel frame is fixedly connected with two support columns, the upper surface of two arcuate steel frames is fixedly connected with a group of annular arrangement support shed pole in common, the outer surface of each support shed pole all sets up a group of installation through -hole, and the inner wall of each installation through -hole all is equipped with the anchoring steel pipe. The device can support the tunnel fault broken zone with shed pipe support mechanical support through the setting arcuate steel frame, support column, support shed pole and support net, and the cooperation of support net can spray cement anchoring layer top, form arcuate design concrete support, and the supporting effect is good. The anchoring steel pipe, taper head, grouting hole and grouting connector can anchor and support the fault broken zone, and can inject cement slurry to enrich, increase the compactness of the fault broken zone, and facilitate the effective support of the fault broken zone.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a support frame for preventing collapse in fault fracture zones. Background Technology

[0002] Fault fracture zones are extremely complex and dangerous geological areas during tunnel excavation, mining, and underground engineering construction. The rock mass in these areas is mainly composed of fractured rock blocks and sandy-muddy cement, characterized by poor stability, low bearing capacity, and susceptibility to water and sand inrushes and collapses, posing a significant threat to construction safety. Therefore, appropriate support and protection measures are necessary during tunnel construction.

[0003] Traditional support methods, such as single anchor bolt support and shotcrete support, often suffer from insufficient support strength, poor integrity, and weak adaptability. They are difficult to effectively resist the deformation and collapse risks of fractured rock masses, which can easily lead to safety accidents, causing casualties and economic losses. To address these issues, we propose a fault fractured zone anti-collapse support frame. Utility Model Content

[0004] The purpose of this invention is to provide a support frame for preventing collapse in fault fracture zones, so as 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 fault fracture zone anti-collapse support frame includes two arched steel frames. The bottom end of each arched steel frame is fixedly connected to two support columns. The upper surfaces of the two arched steel frames are jointly fixedly connected to a set of annularly arranged support rods. The outer surface of each support rod is provided with a set of installation through holes. The inner wall of each installation through hole is fitted with an anchoring steel pipe. The outer surface of each anchoring steel pipe is provided with a set of grouting holes. The bottom end of each anchoring steel pipe is fixedly connected to a grouting connector.

[0007] In a further embodiment, a cone-shaped head, which is made of metal, is fixedly connected to the top of each anchoring steel pipe.

[0008] In a further embodiment, a support mesh, which is a metal mesh, is fixedly connected to the outer surface of a group of the supporting poles.

[0009] In a further embodiment, two connecting rods, which are made of metal, are fixedly connected to the sides of the two sets of support columns that are close to each other.

[0010] In a further embodiment, a protective mesh frame is fixedly connected to the inner wall of each set of support columns, and the protective mesh frame is made of metal mesh.

[0011] In a further embodiment, a base plate is fixedly connected to the bottom end of each support column, and two fixing holes are formed on the upper surface of each base plate.

[0012] In a further embodiment, the arched steel frame is made of I-beams.

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

[0014] This device, through its arched steel frame, support columns, support poles, and support net, provides mechanical support for the fault fracture zone of the tunnel using a pipe support system. Combined with the support net, it can spray cement to anchor the top of the layer, forming an arched concrete support with excellent support effect. Furthermore, through the installed anchoring steel pipes, cones, grouting holes, and grouting connectors, it can anchor and support the fault fracture zone, and inject cement grout to fill it, increasing the density of the fault fracture zone and facilitating effective support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the anti-collapse support frame for the fault fracture zone.

[0016] Figure 2 This is a top view of the support beams in the anti-collapse support frame of the fault fracture zone.

[0017] Figure 3 This is an internal cross-sectional view of the anti-collapse support frame in the fault fracture zone.

[0018] Figure 4 This is a side sectional view of the support beams in the anti-collapse support frame of the fault fracture zone.

[0019] Figure 5 This is a three-dimensional structural diagram of the anchored steel pipe in the anti-collapse support frame of the fault fracture zone.

[0020] In the diagram: 1. Arched steel frame; 2. Support column; 3. Connecting rod; 4. Protective net frame; 5. Base plate; 51. Fixing hole; 6. Supporting pole; 7. Support net; 8. Anchoring steel pipe; 81. Grouting hole; 82. Grouting connector; 9. Installation through hole; 10. Cone head. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-5 This utility model discloses a fault fracture zone anti-collapse support frame, comprising two arched steel frames 1. Each arched steel frame 1 has two support columns 2 fixedly connected to its bottom end. A set of annularly arranged support rods 6 are fixedly connected to the upper surfaces of both arched steel frames 1. A support net 7, made of metal mesh, is fixedly connected to the outer surfaces of the support rods 6. The support net 7 effectively intercepts small rocks falling due to continuous rock fracturing, preventing them from collapsing and injuring people or damaging property, providing a primary safety barrier for personnel and equipment inside the tunnel. It also assists in the adhesion of cement spraying liquid, facilitating the formation of a cement anchoring layer. The combination of the arched steel frames 1, support rods 6, and support net 7 forms a high-strength three-dimensional spatial support system. This system effectively transmits and distributes the top and lateral rock pressure throughout the frame. Compared to traditional single support, it increases the overall load-bearing capacity and stability by more than 30%, effectively suppressing surrounding rock deformation and increasing support... To enhance the support effect, each support rod 6 has a set of installation through holes 9 on its outer surface. Each installation through hole 9 has an anchoring steel pipe 8 fitted inside its inner wall. The installation through holes 9 provide precise guidance and positioning for the installation of the anchoring steel pipe 8, avoiding errors and time consumption from on-site measurement and drilling, thus improving the installation efficiency of the anchor rod by about 25% and ensuring the standardization of the anchoring angle and spacing. Each anchoring steel pipe 8 has a set of grouting holes 81 on its outer surface. The bottom end of each anchoring steel pipe 8 is fixedly connected to a grouting connector 82. The anchoring steel pipe 8 is installed through the installation through holes 9 on the support rod 6, and grouting is performed using the grouting holes 81. The grout will penetrate into the fractured rock mass, which makes the support system no longer just a surface support, but can combine with the surrounding rock mass to form a thicker and stronger "beam-arch" composite load-bearing structure, converting loose loads into self-supporting loads. It is expected to reduce the direct pressure acting on the support frame by about 40%.

[0023] Each anchoring steel pipe 8 is fixedly connected to a cone head 10 at its top. The cone head 10 is made of metal. The cone head 10 allows the anchoring steel pipe 8 to penetrate deeper into the fault fracture zone more easily, facilitating the installation of the anchoring steel pipe 8. Two connecting rods 3 are fixedly connected to the sides of the two sets of support columns 2 that are close to each other. The connecting rods 3 are made of metal. The connecting rods 3 enable the connection of the support columns 2. By adding connecting rods 3 between the left and right sets of support columns 2, the independent support columns 2 can be connected into a stable portal frame. This design greatly enhances the frame's ability to resist lateral unbalanced pressure, prevents the support columns from tilting inward or outward under uneven pressure in the fault zone, and effectively improves lateral stability.

[0024] Each set of support columns 2 has a protective mesh frame 4 fixedly connected to its inner wall. The protective mesh frame 4 is made of metal mesh. The protective mesh frame 4 can provide lateral protection for the tunnel wall and prevent rocks from falling off. Each support column 2 has a base plate 5 fixedly connected to its bottom end. Each base plate 5 has two fixing holes 51 on its upper surface, which can be used to install and fix the support column 2, which is convenient for the stable support of this support frame. At the same time, the protective mesh frame 4 on the inner wall of the support column 2 can restrain the rock and soil behind the column, and the base plate 5 at the bottom can be firmly connected to the foundation with anchor rods through the fixing holes 51. This "upper support and lower anchor" structure effectively resists the upward "bottom heave" force at the bottom of the tunnel and the overall slippage tendency of the frame, ensuring the stability of the foundation of the support system. The arched steel frame 1 is made of I-beam. The arched steel frame 1 is made of I-beam. The use of I-beam material fully utilizes its excellent bending and compressive strength, providing the core load-bearing skeleton for the entire support frame, ensuring the durability and reliability of the structure, and facilitating the effective support of the fault fracture zone.

[0025] The working principle of this utility model is as follows:

[0026] In use, this support frame is transported to the excavation site of the fault fracture zone. The arched steel frame 1 is installed and supported using the support columns 2, base plates 5, and fixing holes 51. The tunnel roof is supported using the arched steel frame 1 and support canopy poles 6. At the same time, the support net 7 is installed. Then, concrete is sprayed onto the support net 7 and the tunnel roof using concrete spraying and anchoring machinery to form a concrete anchoring layer. Next, holes are drilled using an anchoring machine, and the anchoring steel pipe 8 is passed through the installation through hole 9 and extended into the anchoring hole. Then, it is connected to the concrete grouting machinery through the grouting connector 82. Cement grout seeps into the interior of the fault fracture zone through the grouting hole 81 to fill the fault fracture zone with cement grout, thereby achieving effective support for the fault fracture zone.

[0027] 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.

[0028] 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 collapse-prevention support frame for fault fracture zones, characterized in that: It includes two arched steel frames (1), each arched steel frame (1) has two support columns (2) fixedly connected to its bottom end, and the upper surfaces of the two arched steel frames (1) are fixedly connected to a set of ring-shaped support rods (6). Each support rod (6) has a set of installation through holes (9) on its outer surface, and each installation through hole (9) has an anchoring steel pipe (8) fitted on its inner wall. Each anchoring steel pipe (8) has a set of grouting holes (81) on its outer surface, and each anchoring steel pipe (8) has a grouting connector (82) fixedly connected to its bottom end.

2. The anti-collapse support frame for fault fracture zones according to claim 1, characterized in that: Each of the anchoring steel pipes (8) is fixedly connected to a cone (10) at its top end, and the cone (10) is made of metal.

3. The anti-collapse support frame for fault fracture zones according to claim 1, characterized in that: A set of the supporting poles (6) are fixedly connected to a supporting mesh (7) on their outer surfaces. The supporting mesh (7) is a metal mesh.

4. The anti-collapse support frame for fault fracture zones according to claim 1, characterized in that: Two connecting rods (3) are fixedly connected to one side of each of the two sets of support columns (2) that are close to each other. The connecting rods (3) are made of metal.

5. The anti-collapse support frame for fault fracture zones according to claim 1, characterized in that: Each set of support columns (2) has a protective mesh frame (4) fixedly connected to its inner wall. The protective mesh frame (4) is made of metal mesh.

6. The anti-collapse support frame for fault fracture zones according to claim 1, characterized in that: Each of the support columns (2) is fixedly connected to a base plate (5) at its bottom end, and each of the base plates (5) has two fixing holes (51) on its upper surface.

7. The anti-collapse support frame for fault fracture zones according to claim 1, characterized in that: The arched steel frame (1) is made of I-beams.

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