Construction method for managing underground mined-out area or cavity

Abstract

The invention discloses a construction method for managing an underground mined-out area or a cavity, which comprises the following steps of: firstly, drilling a hole from the ground till drilling through the top surface of the mined-out area or the cavity; secondly, putting a steel pipe into the drilled hole with vertical traction of a rope till the bottom of the mined-out area or the cavity; and finally, pouring concrete layer by layer from the drilled hole, namely pouring the concrete to the bottom of the mined-out area or the cavity layer by layer through the steel pipe in the drilled hole till a concrete cone rises to the top surface of the mined-out area or the cavity. The arrangement of the concrete cone can greatly reduce the filling amount of the filler, save the cost and shorten the construction period; and the reinforced effect is greatly superior to that of the grouting scheme in the prior art.

Description

technical field [0001] The invention relates to a construction method for controlling underground goafs or cavities, that is, constructing a concrete circular platform in the underground goafs or cavities to support the top of the gobs or cavities, which can effectively prevent the gobs or cavities from collapsing, Cause damage to structures on the ground. Background technique [0002] With the continuous development of industrial and civil buildings, railways, and highways, the proposed site often encounters underground goafs or cavities, which brings hidden dangers to the construction of ground buildings. Because the underground is gobs or cavities, ground subsidence often occurs Already built structures wreak havoc. Railway and highway construction also often encounter underground mined-out areas or cavities. In the prior art, the treatment of underground mined-out areas or cavities generally adopts a grouting scheme or for small-volume cavities, an integral cavity pour...

AI Technical Summary

Problems solved by technology

The amount of grouting is large, the construction period is long, and the cost is high

In addition, due to the complexity of underground mined-out areas or cavities and low filling saturation, it is difficult to achieve the effect of ensuring that mined-out areas or cavities do not collapse

Hidden dangers ambush for ground engineering construction

Especially for railway and highway projects, often the area of ​​underground mined-out area or cavity is large, and the purpose of reinforcement along the subgrade line cannot be achieved by using the grouting scheme