综合物探在复杂滑坡中的应用——以武都杜家沟滑坡为例

Application of Comprehensive Geophysical Prospecting in Complex Landslides:A Case Study of Dujagou Landslide in Wudu District

物探方法作为经济快捷的滑坡勘查手段已得到国内外的广泛认可,但涉及复杂型滑坡的案例较少。以武都杜家沟滑坡为例,利用浅层地震反射法、高密度电法、地震折射层析法组成了有针对性的综合物探勘查模式,有效查明了该滑坡的覆盖层厚度、基岩起伏变化、断裂分布等地质特征。最后使用综合物探成果结合地面调查、钻孔、槽探等信息回答了杜家沟滑坡地面调查中的种种疑惑,对复杂型滑坡勘查有一定的借鉴意义。

Geophysical exploration has been widely recognized as an economical and rapid means of landslide exploration at home and abroad.However,there are few cases on the research of complex landslides.The Dujiagou landslide of Wudu District in Longnan of Gansu province was taken as an example.A targeted comprehensive geophysical exploration model were established by shallow seismic reflection method,high density electrical method and seismic refraction tomography method.And the geological characteristics such as overburden thickness,bedrock fluctuation and fault distribution of the landslide were effectively identified.Finally,combined with the information of surface survey,borehole survey and trough survey,the comprehensive geophysical exploration results were used to answer the doubts in the surface survey of Dujiagou landslide.The research provided some reference for the exploration of complex landslide.