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Supporting device and method for loess tunnel

A support device and technology for loess tunnels, applied in tunnels, earthwork drilling, tunnel lining, etc., can solve problems such as instability, inappropriateness, and instability of loess water absorption, so as to prevent falling off, increase safety reserves, and facilitate stability Effect

Inactive Publication Date: 2015-05-13
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tunnels generally adopt the support method of bolts and shotcrete. Since the shotcrete must contain water, the loess absorbs the water in the concrete and tends to become unstable. This makes it unsuitable for loess areas to use traditional bolts plus shotcrete. Concrete support method
The shield machine suitable for soft soil adopts the principle of mud-water balance, so there will also be water on the excavation surface, making the loess on the excavation surface easy to absorb water and become unstable.
In the existing methods, there is no support scheme in an anhydrous environment. Therefore, it is of great significance to study the tunnel construction method in a dry environment in the loess area

Method used

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  • Supporting device and method for loess tunnel
  • Supporting device and method for loess tunnel

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 and figure 2 The support structure of a collapsible loess tunnel is shown, including: a wooden plank 1 used for tunnel support, a steel arch frame 2 used for tunnel support, prefabricated reinforced concrete segments 3 and two steel arches Wooden planks for padding between the shelves 24.

[0025] Tunnel support is divided into two supports, the inner one (near the cave wall) is called the first lining, the outer one is called the second lining, the first lining is the main force-bearing component, and the second lining also bears the force, and the second lining is mainly used as a safety reserve .

[0026] Wooden board 1 and steel arch 2 form a lining. Wooden board 1 surrounds the tunnel to prevent the soil from falling off the surface of the tunnel and form a load-bearing ar...

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Abstract

The invention discloses a supporting device and method for a loess tunnel. The method includes the steps that first wood boards are arranged on the outmost layer of the supporting device, are tightly attached to the wall of the tunnel and surround the tunnel by one circle, so that a load-bearing arch is formed; a plurality of steel arch frames are arranged on the inner layers of the first wood boards at intervals, and the steel arch frames are tightly attached to the first wood boards; the space between every two adjacent steel arch frames is filled with a second wood board, and the second wood boards are flush with the surfaces of the steel arch frames; prefabricated steel reinforced concrete pipe pieces are tightly attached to the inner layers of the steel arch frames and the inner layers of the second wood boards and arranged on the innermost layer of the supporting device. The supporting device and method have the advantages that construction is convenient, supporting strength is high, safety and reliability are achieved, no water is needed in the whole process, the number and spacing of the steel arch frames can be adjusted according to on-site practical situations, the prefabricated steel reinforced concrete pipe pieces are adopted as a secondary lining so that construction quality can be better guaranteed compared with conventional anchor sprayed concrete, and the prefabricated steel reinforced concrete pipe pieces also make the tunnel more attractive.

Description

technical field [0001] The invention relates to the technical field of tunnel construction support, in particular to a collapsible loess tunnel support device and a support method. Background technique [0002] The collapsibility of loess is a special engineering geological property of loess. Loess has the property of rapid structural damage and sudden subsidence after being soaked by water under its own weight or external load. The cause of collapsibility is that the loess is mainly composed of silt and weakly hydrophilic minerals, has a macroporous structure, has a small natural water content, and has strong bonded water bonds of clay particles and cement bonds of salt, which can bear a certain amount of moisture when dry. The deformation is not large due to the load, but after soaking, the connection of soil particles is significantly weakened, causing the damage of the soil structure and collapsing deformation. [0003] Loess widely distributed in parts of Northeast, N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/02E21D11/18E21D11/08
CPCE21D11/02E21D11/08E21D11/18
Inventor 王者超宗智李术才王永刚乔丽苹韩友续
Owner SHANDONG UNIV
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