引调水工程隐伏残丘的地球物理勘探  

Geophysical Exploration of Concealed Residual Hill in Water Diversion Project

作　　者：汤克轩 毛深秋[1] 李国瑞[1] 王杰[1] Tang Kexuan;Mao Shenqiu;Li Guorui;Wang Jie(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin,300222)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利水电工程设计》2020年第3期52-55,56,共5页Design of Water Resources & Hydroelectric Engineering

摘　　要：以某大型穿河输水隧洞为例,讨论隐伏凸起地貌的物性分布和地球物理响应特征及其影响因素。通过对工程区域地层电性、弹性参数的分析,探讨水流侵蚀作用、覆盖层厚度变化与隐伏残丘区岩土体物性分布的关系。河水和覆盖层压覆前期,古地层物性也受边坡卸荷、岩体不均匀风化、构造及岩溶发育等因素影响。水流冲刷改造了地表地形,沉积作用加大了异常埋深,蚀变与充填作用使地层物性结构更加复杂,增加了地球物理勘探难度,同时隐伏凸起地貌的存在对一些基于近水平层状地层模型的反演计算存在一定影响。This paper takes a large water conveyance tunnel across the river as an example,discusses the physical property distribution,geophysical characteristics and influencing factors of the hidden convex landform,and the relationship between water erosion,thickness change of the overburden layer and the physical properties distribution of rock and soil in the concealed residual hill area based on the analysis of the electrical and elastic parameters of stratum in the project area.In the early stage of covering of river water and overburden,the physical properties of paleostrata are also affected by slope unloading,uneven weathering of rock mass,structure and karst development.Water erosion changes the surface topography,sedimentation increases the abnormal buried depth,and the erosion and filling effect make the physical structure of stratum more complex,which increases the difficulty of geophysical exploration.At the same time,the existence of concealed uplift landform has certain influence on inversion calculation based on the nearly horizontal layered stratum model.

关 键 词：隐伏山脊 孤山残丘 水下隧洞 地震折射波层析技术 水上高密度电法 

分 类 号：P642[天文地球—工程地质学]