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Support structure for hard rock large-section tunnel construction, and construction method for support structure

A technology for tunnel construction and support structures, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of cumbersome and slow support procedures, and large damage caused by demolition and blasting of temporary supports, so as to benefit the construction structure and reduce damage , The effect of short construction steps

Active Publication Date: 2012-01-04
CHINA RAILWAY 16TH BUREAU GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The main purpose of the present invention is to solve the problems of cumbersome and slow support procedures in the multi-step blasting and excavation construction of (extra) large-section hard rock, and to provide a simple structure, fast construction progress, Support structure and construction method for hard rock large-section tunnel construction that are safe in construction and can minimize damage to temporary support systems caused by hard rock blasting

Method used

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  • Support structure for hard rock large-section tunnel construction, and construction method for support structure
  • Support structure for hard rock large-section tunnel construction, and construction method for support structure
  • Support structure for hard rock large-section tunnel construction, and construction method for support structure

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Embodiment Construction

[0033] The present invention is described in further detail below in conjunction with embodiment.

[0034] Such as figure 2 and Figure 4 As shown, the support used in excavation includes initial support 1, temporary support 2, temporary support 2 is composed of vertical temporary support 3 and longitudinal temporary support 4 connected with the initial support 1 of the tunnel vault; wherein The vertical temporary support 3 is arranged at the center line of the tunnel between the tunnel vault and the tunnel arch line, and its bottom is supported on the unexcavated rock at the arch line, which is a half-leg type. The vertical temporary support 3 and the longitudinal temporary support 4 are I22B I-shaped and I20A I-shaped steel frames respectively. image 3 shown.

[0035] Such as figure 2 and Figure 5 Shown, implement the step of the construction method of above-mentioned structure of the present invention as follows:

[0036] (1) Excavate the left upper step 7, implem...

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Abstract

The invention discloses a support structure for hard rock large-section tunnel construction, and a construction method for the support structure. The support structure comprises an initial support and a temporary support which consists of a plurality of vertical temporary supports and longitudinal temporary supports which are connected with the initial support of a tunnel arch crown, wherein the vertical temporary supports are arranged on a tunnel central line between the tunnel arch crown and a tunnel spring line and the bottoms of the vertical temporary supports are supported on unexcavatedrock on the spring line and are not needed to extend to the bottom of the tunnel section. The support structure solves the problem that support processes are complex and slow and the temporary supports are damaged seriously during blasting in the multistep blasting and excavation construction of (especially) large-section hard rock, and has the advantages of simple structure, quick construction progress, high construction safety and capacity of reducing damage of hard rock blasting to a temporary support system to the maximum extent, and the like.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a support structure for hard rock large-section tunnel construction and a construction method thereof. Background technique [0002] Large-section tunnels usually mainly refer to railway, highway and subway tunnels, and generally refer to tunnels with excavation sections within 40m 2 The above tunnels are used to distinguish tunnels such as hydraulic tunnels with smaller sections. With the improvement of the national economy and the acceleration of national infrastructure construction, with the rapid development of the economy and the continuous improvement of the technical level, more and more railways, highways and subway tunnels have been built in my country, and large-section and extra-large-section tunnels in underground projects construction is also increasing. [0003] Due to the large and flat excavation span of the (extra) large-section tunnel, the interaction of many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D19/06E21D9/00E21D11/10
Inventor 陈鹰凌树云杨征
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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