高密度电法在特高压多端直流示范工程塔基勘察中的应用  

Application of High-density Electrical Method to Tower Pad Investigation of UHV Multi-terminal DC Demonstration Project

作　　者：王永刚 杨建华 董鹏 刘永 甘小迎 Wang Yonggang;Yang Jianhua;Dong Peng;Liu Yong;Gan Xiaoying(Power China Guizhou Electric Power Engineering Co.,Ltd.,Guiyang Guizhou 550008,China)

机构地区：[1]中国电建集团贵州电力设计研究院有限公司,贵州贵阳550008

出　　处：《工程地球物理学报》2025年第1期74-82,共9页Chinese Journal of Engineering Geophysics

基　　金：中国电建集团贵州电力设计研究院有限公司科技项目(编号:GZEDKJ-2024-05)。

摘　　要：乌东德电站送电广东广西特高压多端直流示范工程穿越我国西南典型的热带、亚热带岩溶地貌,受该区域崎岖地形、高山峡谷、陡倾地层等复杂地层和岩性构造影响,常规勘探手段如麻花钻、静力触探、钻探等难以开展,为了查明该区域塔基地层和岩性分布情况,采用高密度电法对塔基地层结构进行探测。开挖及钻探结果表明:高密度电法的电阻率剖面可以清晰地划分出岩性分界面、风化带分布、断裂带和岩溶的发育及其填充情况,取得了良好的地质探测效果。尤其是在隐伏岩溶精细化探测方面,为设计人员提供了量化的岩溶空间分布,给其后续进行线路优化、基础设计及处理方案提供了可靠的数据支撑。The ultra-high voltage(UHV)multi-terminal direct current(DC)demonstration project of Wudongde power station supplying electricity to the provinces of Guangdong and Guangxi traversed the typical tropical and subtropical Karst landforms in southwest China.The conventional exploration methods like twist drilling,static penetration,and drilling are challenging to implement in this region due to its complex geological structures such as rugged terrain,mountain canyons,and steep strata.In order to investigate the geological distribution of the pylon foundation in the study area,a high-density electrical method is employed for detecting the strata structure of the pylon foundation.The excavation and drilling results indicate that the resistivity section obtained from the high-density electrical method can effectively delineate rock facies boundaries,weathering zones,fault zones,as well as Karst development and filling,achieving significant geological exploration outcomes.In particular,it offers a quantitative distribution of Karst spaces to aid designers,providing reliable data support for subsequent route optimization,foundation design,and treatment solutions.

关 键 词：特高压 高密度电法 隐伏岩溶 断裂带 岩性分界面 

分 类 号：P631.3[天文地球—地质矿产勘探]