渑栾高速采空区路段覆岩赋存状态与处治对策

Overburden Conditions and Treatment Measures of the Mian-Luan Expressway Goaf Section

为保障车辆的安全运营,在建设采空区上方高速公路之前,查明高速公路下伏采空区的覆岩赋存状态尤为重要。以渑栾高速采空区路段为研究对象,综合采用现场钻探、理论分析和高密度电法分析此区域下伏采空区深部的覆岩破坏与浅层的扰动情况。结果表明:基于关键层位置的理论方法更适用于分析本区下伏采空区的覆岩破坏高度,研究路段仅K4+790~K5+070路段的采空区位于地表下方10~20 m,其余路段的采空区赋存深度均超过100 m,并以此为基础,提出了渑栾高速采空区路段的处治对策。研究成果可为类似工程的设计与建设提供借鉴意义,具有一定的参考价值。

In order to ensure the safe operation of vehicles,it is very important to analyze the overburden conditions before constructing the expressway above old goafs.Taking the MianLuan expressway goaf section as the research object,the field drilling,theoretical analysis and high-density electrical method were used to analyze the deep overburden damage and shallow disturbance in this area.The results show that the theoretical method based on the key layer location is more suitable for analyzing the overburden failure height in the studied area.Only the goaf of K4+790~K5+070 section is located within the range of 10~20 m below the surface,and the goaf depth of other sections is more than 100 m.On the basis of the above research,the treatment measures for MianLuan expressway goaf section are put forward.The research results can provide reference for the design and construction of similar projects and have certain reference value.