我国现有公路下伏采空区治理技术研究

STUDY ON EXISTING GOVERNING TECHNOLOGY FOR UNDERLYING GOAF IN CHINA

采空区是典型的地质灾害,由于地下采空,上覆掩体在自重作用下冒落、断裂和弯曲,经常造成地裂缝、地表塌陷等灾害的产生。因此,详细阐述了已有采空区的治理技术,主要包括强夯法、跨越法、注浆法,并结合相应的工程实例总结其适用条件。最后从注浆法处置范围的确定、注浆设计、注浆施工工艺、注浆效果检测4个方面介绍了注浆法在公路下伏采空区的应用。

The goaf is a typical geological disaster.Due to underground goaf,the overlying bunker falls,breaks and bends under the effect of self-weight,often causing disasters such as ground fissures and surface subsidence.This paper elaborates on the treatm ent techniques of existing goafs,including the strong rake method,the spanning m ethod and the grouting method,and sum m arizes the applicable conditions with the corresponding engineering exam ples.Finally,the application of grouting m ethod in the undercut go af of highw ay is introduced from four aspects:determ ination of grouting treatm ent scope,grouting design,grouting construction technology and grouting effect detection.