带井电法在城市障碍区间探测中的应用研究
Research on Application of Resistivity Method with Borehole in Detection of Urban Obstacle Interval
杨亮 1周聪 1王轲 2姚振岸 1谢尚平1
作者信息
- 1. 东华理工大学核技术应用教育部工程研究中心,南昌 330013
- 2. 北京城建勘测设计研究院有限责任公司,北京 100101
- 折叠
摘要
城市地下空间探测是当前浅部地球物理勘探的研究热点,城市中复杂的障碍区间给地下空间探测施工带来了极大的困难.针对城市岩土工程勘察中常见的障碍区间探测问题,本文基于带井直流电阻率法,采用数值模拟与应用试验,通过设置不同的观测数据密度,对比分析不同障碍区间宽度条件下的反演效果,开展了方法的可行性研究,分析了方法的适用范围.结果表明:带井电法的探测精度与障碍区间的跨度范围、目标深度及钻井深度等均相关,跨度越大、目标深度越大,提高探测精度所需的钻井深度越大.当障碍区间跨度超过工程钻探相关规范要求的间距时,采用带井电法可为地下空间勘察提供依据.
Abstract
Urban underground space exploration is a research hotspot of shallow geophysical exploration.The complex obstacle interval in the city has brought great difficulties to underground space exploration.Aiming at the common problem of large-span obstacle interval detection in urban geotechnical engineering survey,based on the DC resistivity method with wells,this paper used numerical simulation and application experiments to compare and analyze the inversion effect under different obstacle interval widths by setting different observation data densities.In addition,the feasibility of the method was studied and the scope of application of the method was analyzed.The results show that the detection accuracy is related to the span range of the obstacle interval,the target depth and the drilling depth.With the larger span and the target depth,the greater the drilling depth required to improve the detection accuracy.When the span of the obstacle interval exceeds the spacing required by the relevant engineering drilling regulations,the borehole electrical method has the ability to provide information for underground space exploration.
关键词
城市地下空间/工程勘察/带井电阻率法/数值模拟/障碍区间Key words
urban underground space/engineering survey/resistivity method with borehole/numerical simulation/obstacle interval引用本文复制引用
基金项目
云南省重点研发计划项目(202303AA080006)
江西省教育厅科学技术研究项目(GJJ210703)
核技术应用教育部工程研究中心开放基金(HJSJYB2021-18)
出版年
2024
NETL
NSTL
万方数据