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A safe and rapid excavation and support method for tunnels in water-rich fault zones

A technology for tunnels and faults, which is applied in the direction of tunnels, tunnel linings, and installation of anchor rods. It can solve problems such as slow grouting reinforcement process, affecting construction progress, and poor tunnel reinforcement effects in water-rich fault zones.

Active Publication Date: 2022-03-08
高军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the construction difficulty and improve the construction safety, the tunnels in the existing water-rich fault zone generally adopt the method of top blocking and bottom row, and grouting reinforcement. Although this method can play a better role in drainage and certain reinforcement and support, However, the slowness of the grouting reinforcement process affects the construction progress, and at the same time, this method does not have a good reinforcement effect on tunnels in water-rich fault zones

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  • A safe and rapid excavation and support method for tunnels in water-rich fault zones
  • A safe and rapid excavation and support method for tunnels in water-rich fault zones
  • A safe and rapid excavation and support method for tunnels in water-rich fault zones

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Embodiment 1

[0046] see Figure 8-10 , a safe and rapid excavation and support method for a tunnel in a water-rich fault zone, including advance support, primary support and secondary support, that is, advance support is performed before tunnel excavation, and initial support and secondary support are performed during tunnel excavation. Secondary support.

[0047] With the advancement of the face, geological engineers are required to carry out continuous geological sketch records on the face, and make predictions based on the changes in the geological sketch of the face combined with geological survey data, and propose pre-reinforcement and reinforcement for possible complex geological conditions. Engineering measures to support or change the construction method; among them, the method of obtaining address information can take seismic wave detection as the main means, supplemented by geological radar detection, infrared water detection and other geophysical methods, and the unfavorable geo...

Embodiment 2

[0053] see Figure 9-10 , a safe and rapid excavation and support method for a tunnel in a water-rich fault zone, including advance support, primary support and secondary support, that is, advance support is performed before tunnel excavation, and initial support and secondary support are performed during tunnel excavation. Secondary support.

[0054] With the advancement of the face, geological engineers are required to carry out continuous geological sketch records on the face, and make predictions based on the changes in the geological sketch of the face combined with geological survey data, and propose pre-reinforcement and reinforcement for possible complex geological conditions. Engineering measures for supporting or changing the construction method; when the internal structure of the tunnel is simple and there is no soft soil, there is no need to carry out advanced support at this time, and only need to carry out primary support and secondary support.

[0055] The init...

Embodiment 3

[0061] A method for safe and rapid excavation and support of a tunnel in a water-rich fault zone. Further, the internal structure of the tunnel needs to be tested before the advance support is performed before the tunnel is excavated, including:

[0062] Calculate the detection value of the internal structure of the tunnel according to the detection data;

[0063]

[0064] Among them, h is the detection value of the internal structure of the tunnel, λ is the complexity of the internal structure of the tunnel, a is the amount of sand particles in the soil sampling sample inside the tunnel, m is the amount of the soil sampling sample inside the tunnel, and b is the open source taken to obtain the soil sampling sample inside the tunnel. Excavation method, d is the number of excavation methods that can be used to obtain soil samples inside the tunnel; when the detection value h of the internal structure of the tunnel is less than the preset threshold, it indicates that the struc...

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Abstract

The invention discloses a safe and rapid excavation and support method for a tunnel in a water-rich fault zone, belonging to the technical field of tunnel excavation, in which the tunnel excavation surfaces are divided into central section I, left upper section II, right upper section III, middle step section IV and Five sections, including the lower step section V, will be constructed sequentially according to the requirements. Among them, the initial support type of the central section Ⅰ, the upper left section Ⅱ and the upper right section Ⅲ adopts double-layer support, and the connection of the initial support of the three uses steel bars connected, so that the entire initial support will form a semicircular shape, and at the same time, the strength will be higher; after the central section Ⅰ, the upper left section Ⅱ and the upper right section Ⅲ are excavated 20 meters forward, the construction will be stopped, and then the circular curtain grouting will start; The safe and rapid excavation and support method of the entire tunnel, through simple and effective excavation construction and support cooperation, ensures efficient tunnel excavation, reduces the possibility of tunnel collapse and water seepage, and greatly reduces the construction time cost and energy consumption cost.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation, in particular to a method for safe and rapid excavation and support of a water-rich fault zone tunnel. Background technique [0002] Tunnels are engineering structures buried in the ground. The construction of roads and railways is inseparable from the construction of tunnels, especially in hilly, mountainous and other areas with undulating terrain. Tunnel construction is an indispensable part of the process of road construction. section. Compared with flat road construction, tunnel construction is more difficult and has a longer construction period. Tunnels are often the focus and difficulty of road construction. Since tunnel construction is an excavation of invisible strata, it will face many unknowns. In order to ensure the safe and effective progress of the construction, it is necessary to use the existing technical means to detect the formation conditions, and take corresponding c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/15E21D11/18E21D21/00E21D9/14
CPCE21D9/14E21D11/10E21D11/152E21D11/18E21D21/0026
Inventor 高军林晓翁小川谭发刚熊晓晖黄正凯杨立云贾超吴德兴项小珍李行利张旭东游国平蔡荣喜王东旭徐腾辉
Owner 高军