Backfill repairing method for tunnel collapse cavity

A repair method and cavity technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effects of low risk, high operating efficiency, and reduced construction difficulty

Inactive Publication Date: 2011-09-14
CHINA CONSTR FIFTH ENG DIV CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for backfilling and repairing tunnel collapse cavities that can not only o

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  • Backfill repairing method for tunnel collapse cavity
  • Backfill repairing method for tunnel collapse cavity
  • Backfill repairing method for tunnel collapse cavity

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Embodiment Construction

[0024] figure 1 It is a process flow diagram of the present invention; figure 2 It is a construction schematic diagram of the present invention.

[0025] As shown in the figure: the method for backfilling and repairing the tunnel collapse cavity of the present invention includes the following construction procedures:

[0026] First, positioning drilling: use a total station to assist positioning, and then use a drilling rig to drill holes on the surface 3 above the cavity to form a plurality of through holes 1 connecting the cavity and the surface;

[0027] Second, cavity backfill:

[0028] a. Bottom backfill: choose sand, stone, sandstone cement mixture or cement mortar to backfill the part below the vault;

[0029] b. Backfilling of the landslide cavity: choose materials with cohesive force and certain strength to backfill the landslide cavity;

[0030] Third, excavation and cleaning: after the backfill material in the cavity of the collapse is condensed and stabilized,...

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Abstract

The invention discloses a backfill repairing method for a tunnel collapse cavity, which is a collapse processing method comprising surface drilling and grouting or backfilling. The method comprises the following steps: (1) positioning and drilling; (2) backfilling the cavity; and (3) excavating and cleaning. Through the construction method of drilling and backfilling, the collapse cavity is backfilled with various backfill materials to form a force bearer which bears unstable load of a collapse area so as to prevent further collapse and provide force application point for subsequent support, and then hidden excavation construction is performed; the method reduces the construction difficulty, realizes fast construction, and is equivalent to tunneling in normal geological conditions, and isa very reliable collapse processing method; moreover, the method not only has high safety as the collapse processing staff and machinery carry out construction basically on a safe working surface without potential safety hazards, but also has high construction speed and high operation efficiency.

Description

technical field [0001] The invention relates to an engineering construction method, in particular to a construction method for backfilling and repairing a cavity formed by tunnel collapse. Background technique [0002] Collapse is one of the most common and harmful phenomena in the process of tunnel excavation and construction. Corresponding measures must be taken according to the different conditions of tunnel collapse. At present, the technology of preventing and treating landslides by using advanced small conduits and advanced large pipe sheds in tunnel construction has been relatively mature at home and abroad, but in many cases, this method of dealing with landslides also has its limitations. For example, when a large landslide cavity is formed by a landslide, due to the large landslide area, the rock at the landslide site is extremely unstable, and there is a possibility of further landslide at any time, and personnel and equipment cannot adopt small ahead conduits or ...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 刘灿袁晏仁寻立新
Owner CHINA CONSTR FIFTH ENG DIV CORP LTD
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