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Tunnel transverse cave-to-master cave top brushing construction method and top brushing structure

A technology for main tunnels and horizontal tunnels, applied in tunnels, tunnel linings, shaft linings, etc., can solve problems such as poor risk, achieve the effects of small excavation area, save construction cost and construction time, and increase safety

Inactive Publication Date: 2015-09-23
DALIAN MUNICIPAL DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the two-lane horizontal tunnel entering the three-lane main tunnel, the cross-section and the main tunnel are both large in size, and the risk is higher if the surrounding rock conditions are poor

Method used

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  • Tunnel transverse cave-to-master cave top brushing construction method and top brushing structure
  • Tunnel transverse cave-to-master cave top brushing construction method and top brushing structure
  • Tunnel transverse cave-to-master cave top brushing construction method and top brushing structure

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the attached drawings. Accordingly, the directional terms are used to illustrate, not to limit, the invention.

[0034] figure 1 shows the roof structure when the horizont...

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Abstract

The invention discloses a tunnel transverse cave-to-master cave top brushing construction method. The tunnel transverse cave-to-master cave top brushing construction method comprises the steps that firstly, a transverse cave is constructed to an upper step of a regulated master cave, climbing and direct top brushing are carried out from the top arc outline of the master cave to the width direction of the master cave through a small guiding cave, and a beam is erected at the joint of the transverse cave top and the master cave; secondly, a primary support is carried out on the master cave of the small guiding cave part; thirdly, a vertical support temporarily supported by the small guiding cave in the master cave large mileage direction is dismounted, and the upper step of the master cave is excavated through expanding in the master cave large mileage direction; fourthly, a vertical support temporarily supported by the small guiding cave in the master cave small mileage direction is dismounted, and the upper step of the master cave is excavated through expanding in the master cave small mileage direction through a step method. The invention further discloses a tunnel transverse cave-to-master cave top brushing structure. The small guiding cave top and the master cave top of the top brushing structure are consistent in structure, the beam is erected at the joint of the transverse cave top and the master cave, and a small guiding cave temporary support is located above a master cave primary support. The top brushing excavation area is small, and the construction risk is low.

Description

technical field [0001] The invention relates to the construction field of tunnels, in particular to a roof-raising method and a roof-raising structure of a tunnel with a horizontal hole entering a main hole. Background technique [0002] The current method of raising the roof from the horizontal tunnel into the main tunnel usually adopts the following methods: figure 1 In this way, the profile of the roof is larger than that of the main hole, the distance of the roof is longer, the range is larger, the economic cost and construction efficiency are slow, and the connection between the main hole and the arch frame of the profile is very cumbersome, and after the roof is completed During the construction of the main tunnel, it is necessary to remove the steel frame on the roof and replace the support, especially in the case of poor surrounding rock conditions, the risk is high. In addition, the current way of raising the roof of the main tunnel from the horizontal tunnel is mo...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/14
Inventor 张兵兵
Owner DALIAN MUNICIPAL DESIGN & RES INST
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