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介绍了反射波地震法在老空区分布形态及其发育情况勘测的工作原理,并给出了测线布设原则及成果解释方法。以武云高速老空区段建设场地为例,在K31+500~K33+000路段左、右10 m布设地震反射测线。勘探结果表明:该路段采空区上覆地层已发生整体性沉降,未见明显层位错动现象,现阶段地层沉降稳定,无明显错动,对路基和小型涵洞通道等工程影响较小。
The working principle of reflected wave seismic method in the distribution of old space and the survey of its development is introduced, and the principle of survey line layout and the method of interpretation of results are given. Taking the construction site of the old empty section of Wuyun Expressway as an example, seismic reflection survey lines are laid on the left and right of K31 + 500 ~ K33 + 000 sections. The exploration results show that the overlying strata of the mined-out area of this section have been completely subsided, and no obvious stratification has been observed. At this stage, the subsidence of the strata is stable with no obvious dislocation and little influence on the subgrade and small culvert passage.