工程物探在S244省道K9+500～K10+100采空区的应用

山东省S244省道K9+500～K10+100段存在较严重的采空塌陷隐患,如何准确查清采空区的空间分布特征,对于道路的安全运营非常重要。根据以往类似工程经验,采用单一的物探方法,在准确探测采空塌陷形状、埋深等空间分布特征时存在较大难度,工程钻探可以比较直观的揭露采空塌陷的情况,但需要施工大量钻孔,在经济、时间等方面不可取,综合采用多种物探方法是一种准确有效的工作方法。以该工程为例,通过采用浅层地震反射波法和高密度电阻率法等工程物探方法,准确查明了该路段采空区空间分布特征,并通过比较直观的工程钻探对上述方法进行验证,效果良好。

Application of Engineering Geophysical Exploration in K9 +500 ~ K10 +100 Mined-out Area of S244 Provincial Highway

There is serious mined-out collapse hazards in K9 +500 ~ K10 +100 mined-out area of S244 Provincial Highway in Shandong province. How to accurately identify the space distribution characteristics is very important for the safe operation of the road. Based on past experience in similar projects, using a single geophysical methods, there is a big difficulty in accurately detecting the shape, depth and spatial distribution characteristics of mining subsidence. Engineering drilling can be more intuitive to expose mining subsidence, but need to construct a large number of drill holes. But it is not reasonable in the economy and time. Combination of a variety of geophysical methods is an accurate and efficient working method. Setting this project as an example, by using shallow seismic reflection method and high-density resistivity method, spatial distribution characteristics of the mined-out area in this road have been identified accuratly. By testing through intuitive engineering drilling, it is regarded that the above methods have good effect.