TBM tunnel section steel arch frame connecting device

Abstract

The utility model discloses a TBM tunnel section steel arch frame connecting device. An existing steel arch is formed by welding a steel plate and the end of a profile steel arch and then connecting the steel plate and the end of the profile steel arch into a whole through bolts, so that the profile steel arch is poor in rockburst impact resistance and flexible supporting performance. The device comprises a plurality of profile steel lagging jacks a, wherein two profile steel lagging jacks b are arranged between the two profile steel lagging jacks a at the head and the tail; every two adjacent profile steel arches a are connected through channel steel a and bolts; the two profile steel lagging jacks b are connected through channel steel b and bolts; and the channel steel is arc-shaped. The integrity and the stability of the section steel arch frame are enhanced, and the strength, the rigidity and the impact resistance of the whole structure are improved.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction technology, specifically relating to a TBM tunnel steel arch frame connection device. Background Technology

[0002] As the use of TBM (Tunnel Boring Machine) construction methods in deep-buried long tunnel projects in my country becomes increasingly frequent, the problem of rockburst hazards faced by these tunnels is also becoming more prominent. Frequent rockbursts pose a serious threat to the personal safety of construction workers and the safety of construction machinery such as TBMs. Furthermore, rockbursts increase the cost of support measures. In cases of high-level rockbursts, large-scale block and plate-like spalling, ejection, and flying debris can occur. In severe cases, tons of rock can bounce off the arch, causing large-scale collapses induced by rockbursts. Rockbursts often occur without obvious warning signs, exhibiting suddenness, uncertainty, and randomness. As a global challenge, the prediction and management of rockbursts are still under continuous exploration and improvement.

[0003] TBM (Transportation Machine) tunnel support using circular steel arch frames is a commonly used technique in tunnel engineering construction in my country. During construction, to better reinforce the initial support system of the tunnel, especially in areas with poor geological conditions, support is needed for the tunnel's roof and surrounding area. Steel arch frames have good load-bearing capacity and can play a better supporting role during construction, serving as the main support structure in tunnel engineering. However, because existing steel arch frames use a closed design, with each arch section made by welding steel plates to the ends of the arch and then bolting them together, the steel arch frames suffer from insufficient resistance to rockburst impacts and inadequate flexible support performance. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a TBM tunnel steel arch frame connection device, which improves the overall strength, rigidity and impact resistance of the steel arch frame, effectively reduces the risk of torsional deformation of the steel arch frame, reduces the probability of geological disasters, and ensures the safety of tunnel construction personnel and equipment.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A TBM tunnel steel arch frame connection device includes multiple steel arch frames a, and two steel arch frames b are set between the first and last two steel arch frames a;

[0007] Two adjacent steel arch frames a are connected by channel steel a and bolts; two steel arch frames b are connected by channel steel b and bolts.

[0008] Furthermore, the channel steel a is arc-shaped.

[0009] Furthermore, channel steel a is provided on both sides of the web of the steel arch frame a, and the channel steel a is positioned between the end plates of the steel arch frame a. The web of the channel steel a coincides with the web of the steel arch frame a, and the end plate of the channel steel a coincides with the end plate of the steel arch frame a.

[0010] Furthermore, the channel steel a is provided with 3 channel steel round holes, and the two ends of the steel arch frame a are respectively provided with U-shaped holes and waist-shaped holes, and the U-shaped holes on two adjacent steel arch frames a form a waist-shaped hole;

[0011] The U-shaped holes and waist-shaped holes on the steel arch frame a correspond to the positions of the three channel steel round holes on the channel steel a.

[0012] Furthermore, the web and end plates of the channel steel a and the steel arch frame a are reinforced by welding.

[0013] Furthermore, the channel steel b is arc-shaped.

[0014] Furthermore, channel steels b are respectively provided on both sides of the web of the steel arch frame b; the channel steels b are located between the end plates of the steel arch frame b, the web of the channel steels b coincides with the web of the steel arch frame b, and the end plates of the channel steels b coincide with the end plates of the steel arch frame b.

[0015] Furthermore, the web of the channel steel b is provided with three waist-shaped holes; a bolt is provided in the middle waist-shaped hole of the channel steel b to connect the two channel steels b; the two ends of the channel steel b are respectively connected to the steel arch frame b by bolts.

[0016] Furthermore, the web and end plates of the channel steel b and the steel arch frame b are reinforced by welding.

[0017] The beneficial effects of this utility model are:

[0018] 1) The steel arch frames a of this utility model are connected by arc-shaped channel steel a and reinforced by welding. This makes the steel arch frames a more effectively connected, enhances the integrity and stability of the steel arch frames a, and improves the strength, rigidity and impact resistance of the overall structure.

[0019] 2) The steel arch frame b of this utility model adopts an open design. By using the equipment arch frame installer in combination with the hydraulic cylinder, the assembled steel arch frame is supported and tightened on the rock surface. Then, bolts are used to fasten and lock the opening position of the arch frame. This allows the steel arch frame to be quickly closed into a ring, closely fitting the surrounding rock, improving construction efficiency, saving time and labor, and enabling the initial support to quickly exert its rigidity effect. To a certain extent, it restricts the deformation of the surrounding rock mass, enhances the self-stabilizing ability of the surrounding rock, and ensures construction safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a detailed drawing of the connection of the steel arch frame a of this utility model;

[0022] Figure 3 This is a cross-sectional view of the steel arch frame of this utility model;

[0023] Figure 4 This is a cross-sectional view of channel steel a of this utility model;

[0024] Figure 5 This is a sectional view of the channel steel a connection of this utility model;

[0025] Figure 6 This is a detailed drawing of the connection of the steel arch frame b of this utility model;

[0026] In the diagram, 1-steel arch frame a, 2-channel steel a, 3-waist-shaped hole, 4-U-shaped hole, 5-channel steel round hole, 6-φ22 steel bar, 7-steel arch frame b, 8-channel steel b, 9-bolt. Detailed Implementation

[0027] The present invention will now be described in detail with reference to specific embodiments.

[0028] This invention improves the overall strength, rigidity, and impact resistance of the steel arch frame; and adopts an open design to tighten the assembled steel arch frame against the rock surface, enabling the steel arch frame to be quickly closed into a ring, closely fitting the surrounding rock, improving construction efficiency, saving time and labor, allowing the initial support to quickly exert its rigidity effect, limiting the deformation of the surrounding rock mass to a certain extent, enhancing the self-stabilizing ability of the surrounding rock, and ensuring construction safety.

[0029] like Figure 1 As shown, this utility model includes multiple steel arch frames a1, and two steel arch frames b7 are set between the first and last two steel arch frames a1; adjacent steel arch frames a1 are connected by channel steel a2 and bolts 9; two steel arch frames b7 are connected by channel steel b8 and bolts 9.

[0030] like Figure 2 , 3 As shown in Figures 4 and 5, channel steel a2 is arc-shaped; channel steel a2 is provided on both sides of the web of the steel arch frame a1, and channel steel a2 is located between the end plates of the steel arch frame a1. The web of channel steel a2 coincides with the web of the steel arch frame a1, and the end plate of channel steel a2 coincides with the end plate of the steel arch frame a1.

[0031] The channel steel a2 has three channel steel circular holes 5. The two ends of the steel arch frame a1 have U-shaped holes 4 and waist-shaped holes 3 respectively. The U-shaped holes 4 on two adjacent steel arch frames a1 form a waist-shaped hole. The positions of the U-shaped holes 4 and waist-shaped holes 3 on the steel arch frame a1 correspond to the three channel steel circular holes 5 on the channel steel a2. The web and end plates of the channel steel a2 and the steel arch frame a1 are reinforced by welding.

[0032] like Figure 6 As shown, channel steel b8 is arc-shaped; channel steel b8 is provided on both sides of the web of the steel arch frame b7; channel steel b8 is provided between the end plates of the steel arch frame b7, the web of channel steel b8 coincides with the web of the steel arch frame b7, and the end plates of channel steel b8 coincide with the end plates of the steel arch frame b7.

[0033] The web of channel steel b8 has three oblong holes 3; the middle oblong hole is shorter than the two side oblong holes; bolts 9 are installed in the middle oblong hole 3 of channel steel b8 to connect the two channel steels b8; both ends of channel steel b8 are connected to the steel arch frame b7 by bolts 9. The bolts 9 pass through the web of both channel steel b8 and steel arch frame b7, and bolt holes are provided on the web of steel arch frame b7. The web and end plates of channel steel b8 and steel arch frame b7 are reinforced by welding.

[0034] The installation method of this utility model is as follows:

[0035] Use the arch frame installer to assemble from bottom to top; align the two sections of steel arch frame a1, align the channel steel a2 with the web opening of the steel arch frame a1, and use bolts 9 to connect the two adjacent steel arch frames a1 and channel steel a2; rotate the arch frame installer to assemble the next section of arch frame, and repeat the process. After the upper arch frame is assembled, re-check and tighten all bolts at the connection points of the steel arch frames, and weld reinforcement at the flange position of the channel steel a2 and the steel arch frame a1, and at the interface of the steel arch frame a1.

[0036] Rotate the steel arch frame installer to turn the arch foot to the bottom, support the steel arch frame in the measurement position, set the two channel steels b8 on both sides of the web of the steel arch frame b7 respectively, and tighten the bolts 9 through the waist-shaped hole 3 in the middle of the channel steel b8, thereby clamping the two sides of the web of the steel arch frame b7 and realizing the connection of the two channel steels b8.

[0037] Rotate the arch frame installer to turn the arch foot to the bottom, then operate the hydraulic cylinder to tighten the steel arch frame b7 with the surrounding rock. Adjust the overlap length between the two ends of the channel steel b8 and the steel arch frame b7, and pass the bolts 9 through the waist-shaped holes 3 on both sides of the channel steel b8 and the steel arch frame b7 to achieve the connection between the channel steel b8 and the steel arch frame b7, so that the two sides of b8 are locked with the web of the steel arch frame b7. Finally, weld reinforcement is used at the end plate positions of the channel steel b8 and the steel arch frame b7, and at the steel arch frame interface.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A steel arch frame connection device for TBM tunnels, characterized in that: It includes multiple steel arch frames a(1), and two steel arch frames b(7) are set between the first and last two steel arch frames a(1); Two adjacent steel arch frames a(1) are connected by channel steel a(2) and bolts (9); two steel arch frames b(7) are connected by channel steel b(8) and bolts (9).

2. The TBM tunnel steel arch frame connection device according to claim 1, characterized in that: The channel steel a(2) is arc-shaped.

3. The TBM tunnel steel arch frame connection device according to claim 2, characterized in that: Channel steel a(2) is provided on both sides of the web of the steel arch frame a(1). The channel steel a(2) is located between the end plates of the steel arch frame a(1). The web of the channel steel a(2) coincides with the web of the steel arch frame a(1), and the end plate of the channel steel a(2) coincides with the end plate of the steel arch frame a(1).

4. The TBM tunnel steel arch frame connection device according to claim 3, characterized in that: The channel steel a(2) is provided with 3 channel steel round holes (5), and the two ends of the steel arch frame a(1) are respectively provided with U-shaped holes (4) and waist-shaped holes (3). The U-shaped holes (4) on two adjacent steel arch frames a(1) form waist-shaped holes. The U-shaped hole (4) and waist-shaped hole (3) on the steel arch frame a (1) correspond to the positions of the three channel steel round holes (5) on the channel steel a (2).

5. The TBM tunnel steel arch frame connection device according to claim 4, characterized in that: The channel steel a(2) and the web and end plates of the steel arch frame a(1) are reinforced by welding.

6. The TBM tunnel steel arch frame connection device according to claim 5, characterized in that: The channel steel b(8) is arc-shaped.

7. A TBM tunnel steel arch frame connection device according to claim 6, characterized in that: Channel steel b(8) is provided on both sides of the web of the steel arch frame b(7); the channel steel b(8) is provided between the end plates of the steel arch frame b(7), the web of the channel steel b(8) coincides with the web of the steel arch frame b(7), and the end plate of the channel steel b(8) coincides with the end plate of the steel arch frame b(7).

8. The TBM tunnel steel arch frame connection device according to claim 7, characterized in that: The web of the channel steel b (8) has three waist-shaped holes (3); the waist-shaped hole (3) in the middle of the channel steel b (8) is provided with bolts (9) to connect the two channel steels b (8); the two ends of the channel steel b (8) are respectively connected to the steel arch frame b (7) by bolts (9).

9. A TBM tunnel steel arch frame connection device according to claim 8, characterized in that: The web and end plates of the channel steel b(8) and the steel arch frame b(7) are reinforced by welding.

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