Large-scale karst cavity treatment method for karst tunnel

A treatment method and large-scale technology, applied in tunnels, tunnel lining, excavation, etc., can solve the problems of high construction safety and operational safety risks, difficult construction of dissolution cavity treatment, and long treatment time, etc. The effect of short time and low investment cost

Active Publication Date: 2011-11-23
NO 1 ENG LIMITED OF CR20G
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a large-scale solution cavity treatment method for karst tunnels, which has reasonable design, simple construction, safe and reliable construction process, short construction period, and good treatment eff

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  • Large-scale karst cavity treatment method for karst tunnel
  • Large-scale karst cavity treatment method for karst tunnel
  • Large-scale karst cavity treatment method for karst tunnel

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Embodiment Construction

[0048] Such as figure 2 , image 3 , Figure 4 and Figure 5 As shown, the constructed tunnel 2 needs to pass through the interior of the large-scale dissolved cavity 3, the buried depth of the constructed tunnel 2 is 10m-70m, and the constructed tunnel 2 includes the locations located in the large-scale dissolved cavity according to the sequence of layout positions. The front tunnel section 10 on the front side of the cavity 3 and the rear tunnel section 9 positioned at the rear side of the large-scale solution cavity 3, the front road section is laid in the front tunnel section 10, and the rear tunnel section 9 The rear road section is laid, and the front road section and the rear road section are connected by a cross-cutting chamber road section crossing from the inside of the large-scale dissolution chamber 3, and the cross-cutting chamber road section The left and right sides are all suspended (that is, there is no subgrade that can be supported on the left and right ...

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Abstract

The invention discloses a large-scale karst cavity treatment method for a karst tunnel. In the construction tunnel, the section traversing the interior of a large-scale karst cavity is a traversing karst cavity section, the left and right sides of which are suspended; and the size of the large-scale karst cavity is gradually increased from top to bottom, and the karst cavity is divided into an upper karst cavity and a lower karst cavity by the traversing karst cavity section. The treatment method comprises the following steps of: 1, digging a side slope, and performing reinforcing construction, namely digging the inner wall of the upper karst cavity to form the side slope; 2, backfilling rock slag, namely filling the lower karst cavity by adopting the rock slag to form a filling base layer; 3, grouting and reinforcing the filling base layer, namely reinforcing the filling base layer by using a stabilizing pile and obtaining a road cutting I; and 4, performing paving construction of the traversing karst cavity section on the road cutting I. The method is reasonable in design, simple and convenient in construction, safe and reliable in the construction process, short in construction period and good in treatment effect, and can solve the problems of high construction safety risk, high treatment and construction difficulty, long treatment time, poor treatment effect and the like in the conventional large-scale karst cavity treatment.

Description

technical field [0001] The invention relates to a method for treating dissolved cavities, in particular to a method for treating large-scale dissolved cavities of karst tunnels. Background technique [0002] The problem of karst is a major problem in tunnel engineering. The impact of karst on tunnel engineering is mainly manifested in deformation and instability around the tunnel, which often leads to local collapse, falling blocks and rockfall during tunnel excavation; It not only affects the construction safety, but also directly endangers the safety of personnel and mechanical equipment. The tunnels built in the west and southwest of my country often encounter karst problems. Karst areas are generally characterized by undulating topography, and water basins are easy to form in low-lying places. The long-term dissolution and erosion of surface water forms karst depressions or valleys of various shapes. The repeated circulation of surface water and groundwater forms karst p...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/00E21D11/10E02D17/00E02D17/20E02D3/12
Inventor 王作举薛俊峰吴应明宋长甫吴信军王永锋罗宗帆
Owner NO 1 ENG LIMITED OF CR20G
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