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Parallel multi-tunnel structure and construction method thereof

A technology of tunnel structure and construction method, which is applied to tunnels, tunnel lining, earthwork drilling, etc., can solve the problems of low construction safety, increased extra cost, and long construction period, so as to reduce risks, reduce project costs, and improve construction. quality effect

Inactive Publication Date: 2019-04-05
NANNING RAIL TRANSIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of low construction safety, high construction difficulty, easy increase of extra cost, and long construction period in the prior art when multiple tunnels are excavated in parallel with underground tunnels, and to provide a tunnel with multiple tunnels in parallel Structure and its construction method

Method used

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  • Parallel multi-tunnel structure and construction method thereof
  • Parallel multi-tunnel structure and construction method thereof

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Embodiment 1

[0034] A kind of multi-tunnel parallel tunnel structure described in the present invention, such as Figure 1-2As shown, a tunnel one and a tunnel two are included, and the tunnel two is an underground excavation tunnel, and the tunnel one is a shield tunnel, and the tunnel one includes a tunnel section one 11, and the tunnel two includes a tunnel section two 12, The clear distance between the tunnel section two 12 and the tunnel section one 11 l Less than 6m, a row of several isolation piles 2 is arranged between the tunnel section two 12 and the tunnel section one 11, and all the isolation piles 2 are arranged between the tunnel section two 12 and the adjacent tunnel section one 11. In the interval between less than or equal to 4.5m and greater than or equal to 2.2m, the diameter of each of the isolation piles 2 is 1.2-1.5m, and the buried depth of all the isolation piles 2 exceeds at least 12 of the tunnel section two. The depth of the tunnel bottom is 6m, all the isolatio...

Embodiment 2

[0036] The construction method of a kind of multi-tunnel parallel tunnel structure of the present invention adopts a kind of multi-tunnel parallel tunnel structure as in embodiment 1, and its construction method comprises the following steps:

[0037] a. Tunnel 1 and Tunnel 2 are excavated to the parallel section, and several isolation piles 2 are installed in the interval between tunnel section 12 and tunnel section 11 with a net distance of less than or equal to 4.5m and greater than or equal to 2.2m;

[0038] B, carry out sampling inspection to described isolation pile 2;

[0039] C, install displacement settlement monitoring device on the pile top of all described isolation piles 2;

[0040] d. Continue to excavate tunnel one and tunnel two, construct to the interval where the isolation pile 2 is set, first carry out the excavation of the tunnel section two 12, and wait for the tunnel section two 12 in the interval to complete the initial support , continue the excavation...

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Abstract

The invention discloses a parallel multi-tunnel structure and a construction method thereof. The parallel multi-tunnel structure comprises at least one tunnel I and one tunnel II, wherein the tunnel II is a bored tunnel; the at least one tunnel I comprises a tunnel section I, the tunnel II comprises a tunnel section II, the clear distance between the tunnel section I and the tunnel section II is smaller than 6 m, a plurality of isolating piles are arranged at intervals between the tunnel section I and the tunnel section II, the minimum distance between the outer edge of every isolating pile and the outer edge of the tunnel section II is small than or equal to 0.5 m, and every isolating pile is provided with a displacement and settlement monitoring device. The parallel multi-tunnel structure can effectively block stress transfer caused by construction of two neighboring tunnels, avoid accidents during bored tunnel excavation due to insufficient clear distance, facilitate monitoring of disturbance influence, reduce risk during excavation, optimize full-length construction organization, effectively improve the construction efficiency, shorten the construction period and reduce the construction cost.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a multi-tunnel parallel tunnel structure and a construction method thereof. Background technique [0002] With the gradual enhancement of my country's economic strength and the acceleration of urban development, tunnel engineering is becoming more and more common. The tunnel excavation methods mainly include open cut method, underground method and shield method. At present, in the case of parallel construction of adjacent double tunnels, an effective distance should be maintained between the two tunnels (the clear distance between the two tunnels is at least greater than or equal to one time the tunnel diameter, usually 6m), otherwise two tunnels need to be excavated successively, otherwise It is difficult to effectively control the bias pressure on the top of the cave and the side pressure between the caves, and it is difficult to use the underground excavation metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/14E21D11/10E21F17/18
CPCE21D9/00E21D9/14E21D11/10E21F17/18
Inventor 黄钟晖张世荣王炳华何旭升周峰刘昊杨磊周洪徐飞陈潇邓清林唐高红陈哲宏王治宇陆国天黄志肃张子新印卫华王世玮沈海瑞任正云周理忠白庚王强王五洋张勇焕蒋大伦
Owner NANNING RAIL TRANSIT
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