Tunnel engineering supporting system

Abstract

The utility model discloses a tunnel engineering supporting system which comprises two upper arched beams arranged in parallel and two lower arched beams arranged below the two upper arched beams respectively, and a reinforcement cage is jointly bound between the two upper arched beams and the two lower arched beams. A plurality of supporting sleeves are uniformly and fixedly arranged between the two upper arched girders and the two lower arched girders in the circumferential direction jointly, and concrete is poured and filled outside the reinforcement cage and the supporting sleeves jointly; an anchoring grouting pipe is inserted into the supporting sleeve, and the anchoring grouting pipe is implanted into a tunnel rock stratum; a plurality of sets of grouting holes are evenly formed in the circumferential wall of the anchoring grouting pipe in the length direction at intervals, and the multiple grouting holes in each set are evenly formed in the circumferential direction of the anchoring grouting pipe. The main body frame of the supporting system has high structural stability and has high adhesive force with a tunnel rock stratum, and the supporting strength of a tunnel can be effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering, and in particular to a tunnel engineering support system. Background Technology

[0002] After tunnel excavation, the original balance of the surrounding strata is disrupted, causing tunnel deformation or collapse. To protect the stability of the surrounding rock and ensure traffic safety, the tunnel must have a sufficiently strong support structure, namely the tunnel lining. Current technology typically uses anchor bolts combined with steel mesh for support. The anchor bolts are driven into the rock wall, and the steel mesh is used for surface reinforcement before concrete is poured to form a protective layer. However, this support method generally has poor support effectiveness, exhibiting issues such as weak adhesion between the support structure and the tunnel rock strata, and insufficient support strength. Utility Model Content

[0003] The purpose of this utility model is to provide a tunnel engineering support system to solve the technical problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a tunnel engineering support system, comprising two parallel upper arch beams and two lower arch beams respectively positioned below the two upper arch beams. A reinforcing cage is bound together between the two upper arch beams and the two lower arch beams. Multiple support sleeves are uniformly fixed along the circumference between the two upper arch beams and the two lower arch beams. The exterior of the reinforcing cage and the multiple support sleeves are filled with poured concrete. Anchor grouting pipes are inserted into the interior of the support sleeves and embedded within the tunnel rock strata. Multiple sets of grouting holes are evenly spaced along the circumference of the anchor grouting pipe.

[0006] Furthermore, each of the supporting sleeves has an upper support plate fixedly installed below the two upper arch beams, and the end of each upper support plate is fixedly connected to the corresponding upper arch beam; each of the supporting sleeves has a lower support plate fixedly installed above the two lower arch beams, and the end of each lower support plate is fixedly connected to the corresponding lower arch beam.

[0007] Furthermore, each of the upper support plates has an upper bracket fixedly provided at its end, which engages with the corresponding upper arch beam, and the upper bracket is fixedly connected to the corresponding upper arch beam by bolts; each of the lower support plates has a lower bracket fixedly provided at its end, which engages with the corresponding lower arch beam, and the lower bracket is fixedly connected to the corresponding lower arch beam by bolts.

[0008] Furthermore, each of the lower brackets and the corresponding upper arch beam is symmetrically provided with two support rods.

[0009] Furthermore, each of the lower brackets has two lower connecting ears fixedly fixedly arranged symmetrically at both ends, and the upper arch beam has two upper connecting ears symmetrically arranged on the outer side of each of the upper brackets. The two ends of each support rod are fixedly connected to the corresponding lower connecting ears by bolts.

[0010] Furthermore, the inner circumferential wall of the support sleeve is provided with an internal thread, and the outer circumferential wall of the anchoring grouting pipe is provided with an external thread that matches the internal thread on the inner circumferential wall of the support sleeve.

[0011] Furthermore, the end of the anchoring grouting pipe that enters the rock stratum has a pointed structure.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] This invention comprises a support system with a main frame consisting of support sleeves installed between two upper arch beams and two lower arch beams, and reinforced steel cages tied together. The support sleeves, in conjunction with the support rods and the reinforced steel cages, ensure the structural stability of the main frame. Furthermore, anchoring grouting pipes can be inserted into the tunnel rock strata through each support sleeve. Cement mortar injected through the anchoring grouting pipes enters the tunnel rock strata through the grouting holes. After curing, the anchoring grouting pipes are tightly attached to the tunnel rock strata, thereby improving the adhesion between the support system and the tunnel rock strata. Finally, concrete is poured into the reinforced steel cage to form a complete support system, effectively ensuring the support strength for the tunnel. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 A partial sectional view along the central AA direction;

[0017] Explanation of reference numerals in the attached drawings: 1. Upper arch beam; 2. Lower arch beam; 3. Rock stratum; 4. Reinforcing cage; 5. Support sleeve; 6. Concrete; 7. Upper support plate; 8. Upper clamp; 9. Lower support plate; 10. Lower clamp; 11. Support rod; 12. Lower connecting lug; 13. Upper connecting lug; 14. Anchor grouting pipe; 15. Grouting hole. Detailed Implementation

[0018] like Figures 1-2As shown, a tunnel engineering support system includes two parallel upper arch beams 1 and two lower arch beams 2 respectively located below the two upper arch beams 1. The two upper arch beams 1 are set close to the tunnel rock strata 3. A steel cage 4 is tied between the two upper arch beams 1 and the two lower arch beams 2. In addition, multiple support sleeves 5 are uniformly fixedly installed along the circumference between the two upper arch beams 1 and the two lower arch beams 2. The outside of the steel cage 4 and the multiple support sleeves 5 are filled with concrete 6.

[0019] Each of the supporting sleeves 5 has an upper support plate 7 fixedly installed below the two upper arch beams 1, and the end of each upper support plate 7 is fixedly connected to the corresponding upper arch beam 1. Specifically, the end of each upper support plate 7 is fixedly provided with an upper clip 8 that engages with the corresponding upper arch beam 1, and the upper clip 8 is fixedly connected to the corresponding upper arch beam 1 by bolts.

[0020] Each of the supporting sleeves 5 has a lower support plate 9 fixedly installed above the two lower arch beams 2, and the end of each lower support plate 9 is fixedly connected to the corresponding lower arch beam 2. The end of each lower support plate 9 is fixedly provided with a lower retainer 10 that engages with the corresponding lower arch beam 2, and the lower retainer 10 is fixedly connected to the corresponding lower arch beam 2 by bolts.

[0021] In addition, each of the lower brackets 10 is symmetrically fixedly installed with two support rods 11 between it and the corresponding upper arch beam 2. Specifically, each of the lower brackets 10 has two lower connecting ears 12 symmetrically fixedly installed at both ends, and the upper arch beam 2 has two upper connecting ears 13 symmetrically installed on the outer side of each of the upper brackets 8. The two ends of each support rod 11 are fixedly connected to the corresponding lower connecting ears 12 and lower connecting ears 13 by bolts 14.

[0022] An anchoring grouting pipe 14 is inserted into the support sleeve 5. In this embodiment, the inner circumferential wall of the support sleeve 5 has an internal thread, and the outer circumferential wall of the anchoring grouting pipe 14 has an external thread that matches the internal thread on the inner circumferential wall of the support sleeve 5. The anchoring grouting pipe 14 is implanted into the tunnel rock stratum 3, and the end of the anchoring grouting pipe 14 that enters the rock stratum is a pointed structure. Multiple sets of grouting holes 15 are evenly spaced along the elongation direction on the circumferential wall of the anchoring grouting pipe 14, and the multiple grouting holes 15 in each set are evenly arranged along the circumference of the anchoring grouting pipe 14.

[0023] In actual installation, this utility model first installs support sleeves between two upper arch beams and two lower arch beams, and then binds a steel cage structure to form the main frame of the support system. The support sleeves, together with the support rods and the steel cage, ensure the structural stability of the main frame of the support system. After the anchoring grouting pipes are inserted into the tunnel rock strata through each support sleeve, cement mortar is injected into the interior of the anchoring grouting pipes. The liquid cement mortar enters the interior of the tunnel rock strata through the grouting holes of the anchoring grouting pipes. After solidification, the anchoring grouting pipes are tightly attached to the tunnel rock strata. Finally, concrete is poured into the steel cage to form a complete support system, which can effectively ensure the support strength of the tunnel.

[0024] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A tunnel engineering support system, characterized in that: The system includes two parallel upper arch beams and two lower arch beams respectively positioned below the two upper arch beams. A steel reinforcement cage is tied between the two upper arch beams and the two lower arch beams. Multiple support sleeves are uniformly fixed along the circumference between the two upper arch beams and the two lower arch beams. The steel reinforcement cage and the multiple support sleeves are filled with poured concrete. Anchor grouting pipes are inserted into the support sleeves and embedded into the tunnel rock strata. Multiple sets of grouting holes are evenly spaced along the elongation direction of the circumference of the anchor grouting pipe. The multiple grouting holes in each set are evenly distributed along the circumference of the anchor grouting pipe.

2. The tunnel support system according to claim 1, characterized in that: Each of the support sleeves has an upper support plate fixedly installed below the two upper arch beams, and the end of each upper support plate is fixedly connected to the corresponding upper arch beam; each of the support sleeves has a lower support plate fixedly installed above the two lower arch beams, and the end of each lower support plate is fixedly connected to the corresponding lower arch beam.

3. The tunnel support system according to claim 2, characterized in that: Each of the upper support plates has an upper bracket fixedly provided at its end, which engages with the corresponding upper arch beam. The upper bracket is fixedly connected to the corresponding upper arch beam by bolts. Each of the lower support plates has a lower bracket fixedly provided at its end, which engages with the corresponding lower arch beam. The lower bracket is fixedly connected to the corresponding lower arch beam by bolts.

4. The tunnel support system according to claim 3, characterized in that: Two support rods are symmetrically arranged between each of the lower brackets and the corresponding upper arch beam.

5. The tunnel support system according to claim 4, characterized in that: Each of the lower brackets has two lower connecting ears fixedly fixed at both ends symmetrically. The upper arch beam has two upper connecting ears symmetrically arranged on the outer side of each of the upper brackets. The two ends of each support rod are fixedly connected to the corresponding lower connecting ears by bolts.

6. The tunnel support system according to claim 1, characterized in that: The inner circumferential wall of the support sleeve is provided with an internal thread, and the outer circumferential wall of the anchoring grouting pipe is provided with an external thread that matches the internal thread on the inner circumferential wall of the support sleeve.

7. The tunnel support system according to claim 6, characterized in that: The end of the anchoring grouting pipe that enters the rock stratum has a pointed structure.

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