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A Freezing Method for Repairing Holes in Underpasses of Tunnels

A technique of freezing and voiding, which is applied in infrastructure engineering, construction, soil protection, etc.

Active Publication Date: 2021-07-06
合肥九州龙腾科技成果转化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In view of the traditional landfill treatment of gobs, there are many environmental problems and related problems in the later stage, which have a strong impact on the tunnel passing through

Method used

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  • A Freezing Method for Repairing Holes in Underpasses of Tunnels
  • A Freezing Method for Repairing Holes in Underpasses of Tunnels

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Experimental program
Comparison scheme
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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] The method for repairing the tunnel underpass by the freezing method comprises the following steps:

[0034] 1. Measurement positioning: such as figure 1 , after the owner handed over the site, the construction technology department is responsible for organizing the geological drilling rig to conduct detailed drilling, and at the same time to measure and locate, first reflect the position of the underground excavation tunnel to the surface, and then release the drilling position for the cavity area existing in the original design as required :

[0035] The drilling requirements are as follows: according to the results of the cavity investigation, the air outlet 1 is placed at the highest point of the cavity, and the water injection hole 2 is drilled at the hole port at the far end of the cavity from the air outlet, so as to facilitate freezing of the hose 4 Di...

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Abstract

In view of the many environmental problems in the traditional landfill treatment goaf and the related problems in the later stage, the purpose of the present invention is to provide a method for repairing the tunnel under the tunnel through the freezing method, including: S1. Measurement and positioning; S2. Drilling S3. Intubation; S4. Embedding of frozen hoses; S5. Freezing construction. After the construction of the lowered tunnel is completed, the salt water is circulated to cool down and gradually freeze. The hose used in the present invention flows into the underground cavity together with the frozen water, and can effectively enter the narrow cavity area for freezing, which improves the freezing efficiency more effectively, and can effectively freeze the surrounding rock of the cavity, thereby strengthening the cavity stability of surrounding rock. The invention effectively reduces the impact of undercutting the goaf.

Description

technical field [0001] The invention relates to the field of tunnel cavity treatment, in particular to a method for repairing tunnel underpass cavity by freezing method. Background technique [0002] When the engineering construction encounters abandoned underground cavities in relevant strata or cavities that need to be repaired later in the construction process of related projects, most of them use pile row support for the surrounding soil, or sand and soil backfill for the cavities. However, no matter it is row pile support or sandy soil backfill, other materials need to be injected into the soil that does not exist in the original soil. For example, row piles need to be drilled and injected with concrete. The research on subsidence theory and control of underground mining of railways, water bodies and buildings has achieved fruitful results. The practical application of the theory of rock and soil subsidence has reached the international advanced level, and valuable prac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/11
CPCE02D3/115
Inventor 贺瑞霞胡蓉白文博贾明钊袁延召杨铭斐张硕刘帅
Owner 合肥九州龙腾科技成果转化有限公司
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