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Structure for reinforcing integrality and stability of tunnel surrounding rock through cable ropes and method

An integral and stable technology, applied in the direction of tunnels, earthwork drilling, mining equipment, etc., can solve problems such as landslides, untimely support, and inability to form quickly, so as to reduce local deformation, strengthen initial support, and achieve good results. The effect of bearing tension

Active Publication Date: 2020-01-24
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Drilling and blasting tunnel excavation will cause too much disturbance to the surrounding area when excavating a large section, and it is difficult to control the over-excavation boundary. If the lithology of the previous geological survey is incomplete, the large disturbance generated during the blasting will easily cause landslides, which is time-consuming and labor-intensive.
The roadheader method is slow when excavating large-section tunnels, especially when encountering hard areas such as stonework, the support is not timely, and the support cannot be formed quickly

Method used

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  • Structure for reinforcing integrality and stability of tunnel surrounding rock through cable ropes and method
  • Structure for reinforcing integrality and stability of tunnel surrounding rock through cable ropes and method
  • Structure for reinforcing integrality and stability of tunnel surrounding rock through cable ropes and method

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Effect test

Embodiment 1

[0040] see Figure 1-8 , a structure that uses cables to reinforce the integrity and stability of the surrounding rock of the tunnel, which includes a tunnel 8 excavated inside the surrounding rock mass 7, the top of the tunnel 8 is anchored with anchor rods 2, and the anchor rods 2 are connected by cables 1 is fixedly connected, and the two ends of the cable 1 are fixedly connected to the tunnel anchorage 4 through the tower-type tunnel opening 3 or the pressure-bearing tunnel opening 10 respectively, and the two ends of the cable 1 are anchored. By adopting the above-mentioned structure, during the reinforcement process of the surrounding rock of the tunnel, the longitudinal tension generated by the cable 1 is used to generate a force towards the rock and soil body on the surrounding rock, so as to improve the integrity and stability of the surrounding rock of the tunnel so that the entire surrounding rock of the tunnel can reach the Force balance, offset the deformation of ...

Embodiment 2

[0049] The method for reinforcing the tunnel surrounding rock by the structure of the cable-reinforced tunnel surrounding rock integrity and stability described in any one, is characterized in that it comprises the following steps:

[0050] Step1, calculation: select the position of the main tunnel entrance through the preliminary geological survey and design, and select the position of the tunnel anchorage 4 to determine the distance;

[0051] Step2, construction layout of tunnel anchorage 4: first excavate the tunnel of tunnel anchorage 4, determine the width a, height 2a, depth H and inclination angle α of the tunnel according to the actual situation, and then lay the anchor rod skeleton on it, pouring concrete;

[0052] Step3, the construction layout of the cable tower tunnel entrance 3: determine the position of the entrance according to the design, erect the arch frame of the portal, and build the basic skeleton of the cable tower and the tunnel entrance. The length of t...

Embodiment 3

[0060] Tunnel anchorage 4 is divided into two situations according to the actual situation. The first one uses tunnel anchorage 4 in combination with the tunnel opening, including the following steps: ① Tunnel anchorage 4 excavates its tunnels on both sides of the main tunnel entrance Width a, height 2a, depth H, inclination angle α, ② build a cable tower with a height H above the tunnel entrance, and pre-embed a steel pipe with a diameter D at the tunnel entrance, ③ install a loose cable saddle on the cable tower, and connect the cable 1 to the Anchor, dispersed by scatter saddles, passed through steel pipes into the tunnel. In the above method, the width a, height 2a, depth H, inclination angle α, cable tower height H, and steel pipes of diameter D of the anchorage tunnel are all determined by the actual situation.

[0061] The second type adopts the excavation of the tunnel-type anchorage 4 above the tunnel entrance, including the following steps: ① The tunnel-type anchorag...

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Abstract

The invention provides a structure for reinforcing integrality and stability of tunnel surrounding rock through cable ropes and a method. The structure comprises a tunnel excavated in a surrounding rock body. Anchor rods are anchored on the top of the tunnel and are fixedly connected through the cable ropes. The two ends of each cable rope are fixedly connected with tunnel type anchorages throughcable tower type tunnel portals or pressure bearing type tunnel portals correspondingly, and the two ends of each cable rope are anchored. The structure and the method are widely suitable for variouspoor-geology sections, such as karst caves, fault fracture zones and sections complex in stratum lithology and geological structure, in the tunnel excavation process, avoidance of large-scale landslide of the tunnel surrounding rock will be facilitated, and the possibility of tunnel construction sudden-onset disasters is reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel surrounding rock construction, in particular to a structure and a method for reinforcing the integrity and stability of tunnel surrounding rock by using cables. Background technique [0002] Traditional tunnel excavation methods include drill and blast and roadheader methods. Drilling and blasting tunnel excavation will cause too much disturbance to the surrounding area when excavating a large section, and it is difficult to control the over-excavation boundary. If the lithology of the previous geological survey is incomplete, the large disturbance generated during the blasting will easily cause landslides, which is time-consuming and labor-intensive. . The tunnel boring machine method is slow when excavating large-section tunnels, especially when encountering hard areas such as stonework, the support is not timely, and the support cannot be quickly formed. Contents of the invention [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00E21D20/02E21D21/00E21D9/00
CPCE21D9/006E21D20/00E21D20/021E21D21/00
Inventor 刘杰杜卓兴杨浩宇石谦李运舟谢晓康唐洪宇李洪亚邹冬冬王雨竹高素芳孙涛
Owner CHINA THREE GORGES UNIV