Rapid repair construction method and repair structure of pavement subsidence in karst area

A construction method and a technology for repairing structures, which are applied in the direction of road repair, roads, roads, etc., and can solve problems such as no effect and poor effect of road surface subsidence

Active Publication Date: 2021-04-27
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the repair construction of road surface subsidence, the construction method of grouting first and then backfilling for subsidence weak subgrade is mainly adopted at present. However, due to the deep subsidence area of ​​the building ground caused by underground karst caves or similar reasons, the existing pavement subsidence repair The effect of repairing pavement subsidence in karst areas is poor or ineffective

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  • Rapid repair construction method and repair structure of pavement subsidence in karst area
  • Rapid repair construction method and repair structure of pavement subsidence in karst area
  • Rapid repair construction method and repair structure of pavement subsidence in karst area

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Embodiment Construction

[0054] The present invention will be further specifically described below in conjunction with the accompanying drawings and embodiments.

[0055] like Figure 1 to Figure 7 As shown, in this embodiment, the rapid repair construction method of road surface collapse in karst area includes the following steps:

[0056] Step 1: In order to prevent further subsidence, first remove the loose soil layer in the subsidence area of ​​the road surface along the direction of the collapse line 11, and excavate along the edge 14 of the subsidence area around the collapse cavity 12 to form a stepped side slope 2 (the step type side slope can be increased Stabilize the friction between the soil layer and the backfill material to prevent the settlement difference between the backfill material and the stabilized soil layer), and form a 2m-wide ring platform 3 (i.e. the construction platform) at the bottom of the collapse cavity. The ring platform 3 should be on the stable soil layer 1 ;

[00...

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Abstract

The invention discloses a quick repair construction method for road surface collapse in a karst area, which comprises digging a side slope on a stable soil layer to form a ring platform, setting a circle of cofferdam around the ring platform, and erecting a pouring dam on the top of the cofferdam Concrete slab, and backfill foam concrete and gravel layers sequentially above the poured concrete slab, and lay pavement materials above the gravel layer. Compared with the prior art, the rapid repair construction method and repair structure of road surface collapse in karst areas provided by the present invention can be used for the treatment of road surface collapse caused by the roof collapse of underground caves, and the depth of underground caves is greater than 10m and cannot be backfilled. It is also applicable to the treatment of ground subsidence of buildings caused by similar reasons.

Description

technical field [0001] The invention belongs to the field of road subgrade and pavement collapse repair construction, and in particular relates to a construction method and structure for repairing road pavement collapse caused by underground karst cave collapse. Background technique [0002] Karst collapse refers to the general term for the collapse or subsidence of roof instability due to the expansion of the cave itself or the instability of the roof of the karst caves in the lower soluble rock layer or the soil caves in the overlying soil layer in karst areas. Ground subsidence in karst areas is a relatively common adverse geological phenomenon. The cause of the collapse is often due to the ubiquitous underground soil caves in karst areas. The soil caves are shallow buried, densely distributed, fast-growing, and the strength of the top soil is low. They have a great impact on the stability of buildings and threaten them to varying degrees. safe and normal use. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C23/10
CPCE01C23/10
Inventor 陈爱军袁朝阳刘艳平
Owner GUILIN UNIV OF ELECTRONIC TECH
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