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Method for constructing underground excavated tunnel by adopting chemical grouting for sand layer consolidation

A kind of technology of chemical grouting and construction method

Active Publication Date: 2016-07-20
GUANGDONG NO 2 HYDROPOWER ENGINEERING COMPANY LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method has the disadvantages of long construction time and high cost

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  • Method for constructing underground excavated tunnel by adopting chemical grouting for sand layer consolidation
  • Method for constructing underground excavated tunnel by adopting chemical grouting for sand layer consolidation
  • Method for constructing underground excavated tunnel by adopting chemical grouting for sand layer consolidation

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Embodiment Construction

[0024] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection / connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

[0025] refer to Figure 1 ~ Figure 3 , a construction method for chemically grouting and consolidating sand lay...

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Abstract

The invention discloses a method for constructing an underground excavated tunnel by adopting chemical grouting for sand layer consolidation. Hardening treatment is performed on a tunnel face at a drilling end of a tunnel or culvert, holes are drilled by a spiral drill pipe in gaps of advanced support pipe roofs of the tunnel or culvert, chemical grout is fed from a through hole in the middle of the spiral drill pipe through a grout feeding pipe, discharged at a drill bit and poured into sandy soil, stage grouting is performed in a to-be-grouted interval from outside to inside along the tunnel face of the drilling end, grouting is performed on the a tunnel face at the drilling end of the tunnel or culvert, a plurality of single-hole sand soil consolidated bodies are formed and the sand layer is consolidated. The strength of the sand layer is improved, the construction speed is high, and the cost is low.

Description

technical field [0001] The invention relates to a construction method in the research field of tunnel or culvert construction, in particular to a construction method suitable for chemical grouting and consolidation of sand layers in underground excavation tunnels with loose bottom layers. Background technique [0002] Urban underground transportation construction in municipal engineering, railway engineering construction, and water diversion engineering construction in water conservancy engineering usually require the excavation of underground tunnels or culverts to achieve the purpose of engineering construction. [0003] The stability of the surrounding rock during the excavation of underground tunnels or culverts is crucial to safe construction. However, when tunnels or culverts are excavated in shallow and loose strata, the sand layers that are often encountered are easily collapsed. Tunnel construction is very tricky construction puzzle. At present, the commonly used c...

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Application Information

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IPC IPC(8): E21D9/00E21D11/14
CPCE21D9/001E21D11/14
Inventor 丁仕辉汪文剑
Owner GUANGDONG NO 2 HYDROPOWER ENGINEERING COMPANY LTD