Shield end reinforcing structure

Abstract

The utility model relates to the technical field of tunnel engineering, in particular to a shield end reinforcing structure which comprises a first reinforcing layer arranged on a tunnel pit wall in a tightly attached mode, a second reinforcing layer is arranged on the first reinforcing layer in a tightly attached mode, and a reinforcing net for bonding concrete is arranged in the first reinforcing layer. A plurality of rotating blocks are uniformly arranged on the reinforcing net; and the anchoring assembly is used for fastening the first reinforcing layer to the tunnel pit wall and comprises a fixing rod rotationally arranged on the rotating block and a drill bit arranged at the end of the fixing rod and used for drilling in the tunnel pit wall to form a channel. According to the reinforcing structure, when a shield tunneling machine enters and exits a hole and breaks walls, the reinforcing structure formed by combining the first reinforcing layer and the second reinforcing layer can effectively prevent soil at the upper end of the tunnel pit wall from loosening and collapsing, the construction safety is improved, the reinforcing net plays a role in bonding concrete, concrete forming is facilitated, and the structural strength of the reinforcing structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a shield end head reinforcement structure. Background Art

[0002] As a typical representative of mechanical tunnel excavation, the shield method has been gradually and widely used in tunnel construction in the fields of transportation engineering, urban rail transit, water conservancy engineering and municipal engineering.

[0003] At present, when the shield machine enters and exits the tunnel, it is very easy to cause the tunnel end to collapse, leak water, leak mud or leak slurry. Therefore, effective measures must be taken to reinforce the soil so that the tunnel soil has strong self-stability and no seepage occurs.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not mean that the above content is the closest prior art. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned deficiencies and provide a shield end head reinforcement structure.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a shield end reinforcement structure, comprising a first reinforcement layer tightly arranged on the tunnel pit wall, a second reinforcement layer tightly arranged on the outside of the first reinforcement layer, a reinforcement mesh bonded to concrete arranged inside the first reinforcement layer, and a plurality of rotating blocks evenly arranged on the reinforcement mesh;

[0007] The anchoring assembly is used to fasten the first reinforcement layer to the tunnel pit wall, and includes a fixing rod rotatably arranged on the rotating block, and a drill bit arranged at the end of the fixing rod and used to drill a hole in the tunnel pit wall to open a channel.

[0008] Furthermore, the fixing rod is provided with an opening for outputting the freezing gas into the channel.

[0009] Furthermore, a connecting sleeve is provided on one end of the fixing rod away from the drill bit, and a connecting member for extending the anchoring length of the fixing rod is rotatably provided on the other end of the connecting sleeve.

[0010] Furthermore, the connecting component includes an externally threaded rotating rod rotatably connected to the connecting sleeve and an internally threaded rotating seat arranged at the end of the externally threaded rotating rod.

[0011] Furthermore, the internal structure of the second reinforcement layer is the same as that of the first reinforcement layer.

[0012] Furthermore, the outer end of the internal thread rotary seat is provided with a mounting opening.

[0013] Compared with the existing technology, the utility model has the following beneficial effects: the utility model sets the first reinforcement layer and the second reinforcement layer in a stacked assembly, and when the shield machine enters and exits the hole to break the wall, the reinforcement structure of the combination of the first reinforcement layer and the second reinforcement layer can effectively prevent the loosening and collapse of the soil at the upper end of the tunnel pit wall, thereby improving the safety of construction. The reinforcement mesh plays the role of bonding concrete, which helps to form concrete and improve the structural strength of the reinforcement structure; and through the set anchoring assembly, not only can the first reinforcement layer and the second reinforcement layer be fastened to the tunnel pit wall, and the evenly distributed anchoring assembly makes the reinforcement structure more evenly and stably fastened, and the length of the anchoring assembly can be selected to increase or decrease according to actual construction requirements, and the reinforcement structure can be fastened and installed more stably. It is not only limited to double-layer reinforcement, and has the advantages of easy installation and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 A three-dimensional structural diagram of an embodiment of the present invention from one perspective;

[0016] Figure 2 for Figure 1 A in the middle shows the enlarged structure diagram;

[0017] Figure 3 for Figure 1 The structure diagram at B is enlarged;

[0018] Figure 4 A three-dimensional structural diagram of an anchor assembly according to an embodiment of the present invention from one perspective;

[0019] Figure 5 This is a three-dimensional structural diagram of a cross section of an anchoring assembly according to an embodiment of the present invention.

[0020] In the figure: 1. Tunnel pit wall; 2. First reinforcement layer; 201. Reinforcement mesh; 202. Rotating block; 3. Second reinforcement layer; 4. Anchor assembly; 41. Fixing rod; 411. Opening; 42. Drill bit; 43. Connecting sleeve; 44. Connecting member; 441. Externally threaded rotary rod; 442. Internally threaded rotary seat. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] like Figure 1-5 As shown, the present invention provides a shield end reinforcement structure, comprising a first reinforcement layer 2 tightly arranged on a tunnel pit wall 1, a second reinforcement layer 3 tightly arranged on the outside of the first reinforcement layer 2, a reinforcement mesh 201 bonded with concrete arranged inside the first reinforcement layer 2, and a plurality of rotating blocks 202 evenly arranged on the reinforcement mesh 201;

[0025] The anchoring assembly 4 is used to fasten the first reinforcement layer 2 to the tunnel pit wall 1, and includes a fixing rod 41 rotatably arranged on the rotating block 202, and a drill bit 42 arranged at the end of the fixing rod 41 and used to drill a hole in the tunnel pit wall 1 to open a channel.

[0026] In the specific implementation, a prefabricated first reinforcement layer 2 formed by casting concrete is used on the outside of the reinforcement net 201, and the rotating blocks 202 are evenly distributed and installed on the reinforcement net 201, so that the anchor assembly 4 can be rotatably connected. At this time, a drilling rig is assembled at the outer end of the anchor assembly 4, and the drilling rig is started to drive the drill bit 42 welded at the front end of the fixed rod 41 included in the anchor assembly 4 to rotate, and drill holes are drilled and fixed at the corresponding position on the tunnel pit wall 1, thereby effectively preventing the loosening and collapse of the soil at the upper end of the tunnel pit wall 1 through prefabrication, thereby improving the safety of construction.

[0027] In one embodiment, the fixing rod 41 is provided with openings 411 for delivering freezing gas into the passage. This design, with openings 411 machined on both sides of the fixing rod 41 near the drill bit 42, allows for the freezing gas to be delivered via a pipe inserted into the fixing rod 41 after the fixing rod 41 is inserted into the tunnel pit wall 1. This pipe, activated by power, freezes and reinforces the surrounding surface of the tunnel pit wall 1 through the openings 411, forming a temporary support and ensuring safe subsequent construction.

[0028] It should be noted that the freezing gas output from the opening 411 includes but is not limited to low-temperature liquid CO 2 .

[0029] In one embodiment, a connecting sleeve 43 is provided on the end of the fixing rod 41 away from the drill bit 42, and a connecting member 44 is rotatably mounted on the other end of the connecting sleeve 43 for extending the anchoring length of the fixing rod 41. This design utilizes the connecting sleeve 43, which is internally threaded and welded within a groove machined on the end of the fixing rod 41 away from the drill bit 42, to extend the connecting member 44 on one end of the fixing rod 41 by rotatably mounting it within the connecting sleeve 43. This allows the anchoring length of the fixing rod 41 to be increased or decreased according to actual construction requirements, resulting in excellent performance and universal applicability.

[0030] In one embodiment, the connecting member 44 includes an externally threaded rotating rod 441 rotatably connected to the connecting sleeve 43, and an internally threaded rotating seat 442 disposed at the end of the externally threaded rotating rod 441. This design, by rotating the externally threaded rotating rod 441 at the end of the fixed rod 41 and assembling it within the connecting sleeve 43, and the internally threaded rotating seat 442 welded to the outer end of the externally threaded rotating rod 441, allows for double or even multiple reinforcement of the tunnel wall 1 according to actual construction requirements, thereby ensuring a good reinforcement effect when the shield machine enters and exits the tunnel and breaks through the wall.

[0031] It should be noted that the number of the connecting member 44 is one or more.

[0032] In one embodiment, the internal structure of the second reinforcement layer 3 is identical to that of the first reinforcement layer 2. This design allows for a more stable fastening of the tunnel wall 1 by using concrete to cast the second reinforcement layer 3 having the same structure as the first reinforcement layer 2 on the exterior of the reinforcement mesh 201 and by using the rotating blocks 202 evenly mounted on the reinforcement mesh 201. The corresponding connecting members 44 can be assembled on the outer ends of the fixing rods 41.

[0033] In one embodiment, a mounting opening is provided at the outer end of the internally threaded seat 442. This design allows for the mounting opening to be machined on the outer end of the internally threaded seat 442, allowing for the assembly of a connecting member 44 of the same structure by rotating the externally threaded rod 441 included on the connecting member 44 into the internally threaded groove machined within the internally threaded seat 442. This increases the anchoring length, allows for multiple reinforcements, and facilitates overall construction.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A shield end reinforcement structure, comprising a first reinforcement layer (2) arranged closely on a tunnel pit wall (1), a second reinforcement layer (3) being arranged closely on the outside of the first reinforcement layer (2), characterized in that: A reinforcement mesh (201) bonded to concrete is provided in the first reinforcement layer (2), and a plurality of rotating blocks (202) are evenly arranged on the reinforcement mesh (201); An anchoring assembly (4) is used to fasten the first reinforcement layer (2) to the tunnel pit wall (1), comprising a fixing rod (41) rotatably arranged on the rotating block (202), and a drill bit (42) arranged at the end of the fixing rod (41) and used to drill a hole in the tunnel pit wall (1) to open a channel.

2. A shield end reinforcement structure according to claim 1, characterized in that: The fixing rod (41) is provided with an opening (411) for outputting the freezing gas into the channel.

3. The shield end reinforcement structure according to claim 1, characterized in that: A connecting sleeve (43) is provided at one end of the fixing rod (41) away from the drill bit (42), and a connecting member (44) for extending the anchoring length of the fixing rod (41) is rotatably provided at the other end of the connecting sleeve (43).

4. A shield end reinforcement structure according to claim 3, characterized in that: The connecting member (44) comprises an external threaded rotating rod (441) rotatably connected to the connecting sleeve (43) and an internal threaded rotating seat (442) arranged at the end of the external threaded rotating rod (441).

5. The shield end reinforcement structure according to claim 1, characterized in that: The internal structure of the second reinforcement layer (3) is the same as that of the first reinforcement layer (2).

6. The shield end reinforcement structure according to claim 4, characterized in that: The outer end of the internal thread rotary seat (442) is provided with a mounting opening.

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