摘要
随着城市轨道交通的发展,城市山岭隧道勘察已成岩土工程勘察中热门课题之一。文章以南沙至珠海(中山)城际工程(万顷沙—兴中段)地铁工程过山段勘察为例,选用微动探测法、高密度电法和土壤氡浓度测量法进行综合探测,划分了该区域岩土分界面,推断出2条隐伏断裂的位置及影响范围。探测结果表明,微动探测法在山岭地区干扰小的条件下,能够采集到高质量的数据,划分岩土分界面和推断断裂的效果较好;高密度电法对于断裂破碎带较为敏感,但对于地层结构划分的能力较弱;土壤氡浓度测量能大致圈定断裂的位置,但无法确定断裂的影响深度和倾向。
With the development of urban rail transit,the survey of urban mountain tunnels has become one of the hot topics in geotechnical engineering survey.This paper takes the survey of the mountain crossing section of Nansha to Zhuhai intercity subway project as an example.Three methods are selected for comprehensive detection including microtremor survey method,highdensity electrical method,and soil radon measurement method.The rock soil interface in the area is divided and the locations and impact ranges of two hidden faults are inferred with good detection results.The research indicates that the microtremor survey method can obtain high-quality data in mountainous areas with minimal interference,and is effective in dividing rock soil interfaces and inferring faults.The high-density electrical method is more sensitive to fracture zones,but less ideal for classifying geological structures.The soil radon concentration measurement can roughly delineate the location of faults,but cannot determine the fault tendency and depth of influence.
作者
孙思亮
SUN Siliang(Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou 510010,Guangdong,China)
出处
《城市地质》
2024年第3期398-405,共8页
Urban Geology
基金
广州地铁设计研究院股份有限公司科研项目城市地下空间病害体综合物探探测技术研究(KY-2022-125)资助。
关键词
山岭隧道
微动探测法
高密度电法
土壤氡浓度测量
mountain tunnel
microtremor survey method
high-density electrical method
soil radon measurement
