Draw bar arch-truss combined tunnel segment reinforcing structure

Abstract

The utility model belongs to the field of tunnel reinforcement, and particularly relates to a pull rod arch-truss combined tunnel segment reinforcement structure which mainly comprises a composite pull rod and an arch truss. A composite pull rod in the structure is composed of three pull rods, high-strength arc-shaped steel nails, special steel pipes and lateral supports, a plurality of spherical supports and spherical joints are welded to the outer side arch frame and the inner side arch frame respectively, and the outer side arch frame and the inner side arch frame are fixedly connected through the truss rods through the spherical supports and the spherical joints to form the arch truss. A truss structure and a pull rod arch structure are combined, and the truss has the advantages that a rod piece mainly bears tension or pressure, so that the effect of materials can be fully exerted, the materials are saved, and the structural weight is reduced; and the stress system is simple, the two-force-rod unit is adopted, the construction is convenient, and the construction speed is high. And the reinforcing effect of the tunnel segment reinforcing structure is improved by fully utilizing and combining the advantages of stress and structural form of the pull rod arch and the truss structure.

Description

Technical Field

[0001] The utility model relates to the field of tunnel reinforcement, in particular to a tie-rod arch-truss combined tunnel segment reinforcement structure. Background Art

[0002] In recent years, with the development of urbanization in the country, the urban population density has increased sharply, the ground space has decreased year by year, and the construction of cities has gradually focused on the underground space. my country's tunnel transportation has made great progress. However, with the continuous increase in the number of operating tracks, unfavorable working conditions such as ground loading and surrounding foundation pit unloading will inevitably appear above the subway tunnel, resulting in serious problems such as cracks, peeling, leakage and misalignment of the pipe segments, which brings huge safety hazards to the normal operation of the tunnel. Therefore, it is of great reference significance for urgent projects to reinforce the parts of the tunnel that are greatly affected by environmental factors around the tunnel or have large deformation of the pipe segments.

[0003] Although there are some reinforcement structures and construction methods for tunnels, such as installing steel rings on the inner wall of tunnel segments and using jacks, the structure of installing steel rings on the inner wall of tunnel segments cannot achieve a good reinforcement effect by placing steel rings in a narrow space. Before installation, it is necessary to estimate the linearity of the concrete segment, the gap and the cross-sectional diameter very accurately, and the operation is very complicated and cumbersome. Regarding the method of using jacks to support the tunnel segments, the reinforcement effect of this structure is not ideal, and it may also cause the tunnel segments to be completely destroyed. Therefore, it is necessary to continuously invent and improve the existing tunnel reinforcement structures and construction methods; therefore, a tie-arch-truss combined tunnel segment reinforcement structure is proposed to address the above problems. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model proposes a tie-arch-truss combined tunnel segment reinforcement structure.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a tie rod arch-truss combined tunnel segment reinforcement structure, including a shield tunnel segment, the main body of which is a composite tie rod and an arch truss; the composite tie rod in the structure is composed of three tie rods, high-strength arc steel nails, special steel pipes and lateral supports, and multiple spherical supports and ball nodes are welded on the outer arch frame and the inner arch frame respectively, and the outer arch frame and the inner arch frame are fixedly connected by multiple trusses through the spherical supports and ball nodes to form an arch truss;

[0006] Preferably, the outer arch frame and the inner arch frame are connected to form an arch truss by connecting a plurality of trusses, and the lower ends of the arch trusses are fixedly connected by three tie rods;

[0007] Preferably, the spherical bearings and spherical nodes on the outer arch frame and the inner arch frame are welded to the steel frame;

[0008] Preferably, each of the ball nodes on the inner arch frame and each of the spherical supports on the outer arch frame is provided with a built-in threaded hole, both ends of the truss rod are external threads, and the thread directions of the two ends are opposite, and the truss rod is rotatably connected with the built-in threaded holes on the spherical supports and the ball nodes;

[0009] Preferably, both ends of the tie rod are externally threaded, the tie rod is threadedly connected to the truss, and the tie rod is threadedly connected to the ball node through the truss;

[0010] Preferably, both ends of the composite tie rod are made of special steel pipes to bear the force, and the tie rod is made of high-strength steel;

[0011] Preferably, high-strength arc-shaped steel nails are welded on the spherical support and the spherical node and anchored to the foundation below;

[0012] Preferably, the lateral supports are fixed in corresponding reserved holes on the shield tunnel segments, and the expansion bolts of the lateral supports connected to the spherical supports are embedded in the shield segments by anchoring.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model uses a tie-rod arch structure, which is a major improvement on the tunnel reinforcement structure and is a relatively important innovative idea in the entire utility model. The arch together with its support or tie rods constitute an arch structure. Due to the existence of horizontal thrust, each section of the arch is mainly under compression, and the bending moment and shear force in the arch are much smaller. Therefore, it can save materials, improve rigidity, increase span, and greatly improve the reinforcement effect, reducing deformation and cracking of the tunnel. The lower end of the arch surface is connected by a tie rod to prevent stress concentration at both ends from damaging the segments during segment reinforcement. It is highly innovative and feasible to apply the advantages of the tie-rod arch to tunnel segment reinforcement;

[0015] 2. The utility model adopts a combination of truss structure and tie-rod arch structure. The advantage of truss is that the rods mainly bear tension or pressure, which can give full play to the role of materials, save materials and reduce the weight of the structure; and its force system is simple, all of which are two-force rod units, easy to construct and fast to build. Make full use of and combine the advantages of tie-rod arch and truss structure in force and structural form to improve the reinforcement effect of tunnel segment reinforcement structure;

[0016] 3. Each spherical support on the outer truss of the utility model is connected with an expansion bolt, and anchoring it on the shield tunnel segment can greatly improve the integrity between the reinforcement structure and the shield tunnel segment; the evenly distributed expansion bolts can also better balance the evenly distributed load, so that the structure has better stress performance and reinforcement effect;

[0017] 4. The composite tie rod used in the utility model can withstand greater forces. In terms of node processing, the utility model adopts the method of inserting high-strength arc steel nails into the foundation and anchoring the lateral supports in the shield segment to unload the load transmitted to the support, and selects tie rods with greater tensile strength and special steel pipes to resist external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the composite pull rod of the utility model;

[0022] Figure 4 It is a schematic diagram of the bottom support of the utility model;

[0023] Figure 5 It is a schematic diagram of a ball node of the utility model;

[0024] Figure 6 It is a schematic diagram of the spherical bearing of the utility model.

[0025] In the figure:

[0026] Spherical bearing 101, outer arch frame 102, inner arch frame 103, truss 104, tie rod 105, ball node 106, expansion bolt 107, high-strength arc steel nail 108, special steel pipe 109, lateral bearing 110, composite tie rod 1, arch truss 2. DETAILED DESCRIPTION

[0027] 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.

[0028] The following is combined with Figure 1-6 To further explain this application in detail,

[0029] The embodiment of the present application discloses a tie rod arch-truss combined type tunnel segment reinforcement structure, including a shield tunnel segment, the main body of which is a composite tie rod 1 and an arch truss 2; the composite tie rod 1 in the structure is composed of three tie rods 105, high-strength arc steel nails 108, special steel pipes 109 and lateral supports 110, and the outer arch frame 102 and the inner arch frame 103 are respectively welded with a plurality of spherical supports 101 and ball nodes 106, and the outer arch frame 102 and the inner arch frame 103 are fixedly connected by a plurality of trusses 104 through the spherical supports 101 and the ball nodes 106 to form an arch truss 2;

[0030] The outer arch frame 102 and the inner arch frame 103 are connected to form an arch truss 2 by connecting a plurality of trusses 104, and the lower ends of the arch truss 2 are fixedly connected by three tie rods 105;

[0031] The spherical support 101 and the spherical node 106 on the outer arch frame 102 and the inner arch frame 103 are welded to the steel frame;

[0032] Each of the ball nodes 106 on the inner arch frame 103 and each of the spherical seats 101 on the outer arch frame 102 is provided with an internal threaded hole, both ends of the truss rod 104 are external threads, and the thread directions of the two ends are opposite, and the truss rod 104 is rotatably connected with the internal threaded holes on the spherical seats 101 and the ball nodes 106;

[0033] Both ends of the tie rod 105 are externally threaded, the tie rod 105 is threadedly connected to the truss rod 104, and the tie rod 105 is threadedly connected to the ball node 106 through the truss rod 104;

[0034] The two ends of the composite tie rod 1 are made of special steel pipes 109 to bear the force, and the tie rod 105 is made of high-strength steel;

[0035] High-strength arc-shaped steel nails 108 are welded on the spherical support 101 and the spherical node 106 and anchored to the foundation below;

[0036] The lateral supports 110 are fixed in corresponding reserved holes on the shield tunnel segments. The lateral supports 110 are connected to the expansion bolts 107 on the spherical supports 101 and embedded in the shield segments by anchoring.

[0037] Working principle: According to the actual requirements of tunnel segment reinforcement, the outer arch frame and the inner arch frame are processed, and the positions for the installation and welding of the spherical bearings and ball nodes are reserved. The spherical bearings are installed in the reserved positions, and then the trusses are tightened to install them one by one on the spherical bearings and ball nodes, and the expansion bolts are connected one by one to the spherical bearings on the outer arch frame, and the three tie rods are connected to the ball nodes at the lower end of the arch truss by bolts, and the high-strength arc steel nails and lateral bearings are respectively installed on the ball nodes and spherical bearings at the lower end of the tie rod arch, corresponding holes are drilled on the shield tunnel segments, and the expansion bolts, high-strength arc steel and lateral bearings are fixed accordingly to complete the installation.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A tie-arch-truss combined tunnel segment reinforcement structure, comprising a shield tunnel segment, characterized in that: The main body is a composite tie rod (1) and an arch truss (2); the composite tie rod (1) in the structure is composed of three tie rods (105), a high-strength arc-shaped steel nail (108), a special steel pipe (109) and a lateral support (110); a plurality of spherical supports (101) and ball nodes (106) are welded on the outer arch frame (102) and the inner arch frame (103), respectively; a plurality of trusses (104) are used to fix the outer arch frame (102) and the inner arch frame (103) through the spherical supports (101) and the ball nodes (106) to form an arch truss (2).

2. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: The outer arch frame (102) and the inner arch frame (103) are connected to a plurality of trusses (104) to form an arch truss (2), and the lower ends of the arch truss (2) are fixedly connected via three tie rods (105).

3. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: The spherical support (101) and the spherical node (106) on the outer arch frame (102) and the inner arch frame (103) are welded to the steel frame.

4. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: Each of the ball nodes (106) on the inner arch frame (103) and each of the spherical supports (101) on the outer arch frame (102) is provided with an internal threaded hole, both ends of the truss rod (104) are external threads, and the thread directions of the two ends are opposite, and the truss rod (104) is rotatably connected with the internal threaded holes on the spherical supports (101) and the ball nodes (106).

5. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: Both ends of the pull rod (105) are externally threaded, the pull rod (105) is threadedly connected to the truss rod (104), and the pull rod (105) is threadedly connected to the ball node (106) through the truss rod (104).

6. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: Special steel pipes (109) are used at both ends of the composite tie rod (1) to bear force, and the tie rod (105) is made of high-strength steel.

7. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: High-strength arc-shaped steel nails (108) are welded on the spherical support (101) and the spherical node (106) and are anchored to the foundation below.

8. The tie-arch-truss combined tunnel segment reinforcement structure according to claim 1, characterized in that: The lateral support (110) is fixed in a corresponding reserved hole on the shield tunnel segment, and the expansion bolt (107) of the lateral support (110) connected to the spherical support (101) is embedded in the shield segment by anchoring.

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