综合物探在大瑞铁路怒江特大桥地质勘测中的应用

以新修铁路大理至瑞丽怒江特大桥为例,经过对其现场地质条件及地球物理特征等综合因素的考虑,采用高密度电法、地震反射波法、电磁波CT法相结合的综合物探方法,较为准确地查明了桥基区域持力层深度范围内的岩溶发育、断层位置走向、地层界线及岩体完整程度等地质情况,为大桥桥位最终的选线和桥梁基础设计提供了良好的勘探资料。

Application of Comprehensive Geophysical Prospecting in Geological Survey at Grand Nujiang River Bridge on Dali-RuiLi Railway

Taking Grand Nujiang River Bridge on the new railway from Dali to Ruili as an example, this paper, with the combination of site geological conditions and geophysical features considered, used a geophysical prospecting method, which integrates high-density resistivity method, seismic reflection wave method and electromagnetic CT method; and found the relatively correct geological situations in the depth range of bearing stratum in the bridge foundation area, such as the karst development, fault trend, stratigraphic boundary and rock integrity, which are the helpful prospecting information for final selection of the bridge location and design of bridge foundation.