广州市轨道交通穿越房屋密集区物探方法的选择与应用  

Selection and application of geophysical prospecting methods in dense housing area along Guangzhou metro lines

作　　者：李开朗 刘红兵 LI Kailang;LIU Hongbing(Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou 510010,Guangdong,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510010

出　　处：《城市地质》2023年第2期225-231,共7页Urban Geology

摘　　要：随着广州市城市轨道交通迅速发展,多处轨道交通设计线路穿越下穿住宅区、工业园区、城中村等房屋密集区。对于勘察实施中受场地协调或建筑物、构筑物影响等限制钻孔稀疏区域,开展物探探测来弥补无法利用钻探获取的局部地层信息,这对后期城市轨道交通设计、安全施工具有重要意义。选择广州市城中村3个实例,采用微动勘探法、弹性波CT法获取不同房屋密集区地下浅层信息,分析不同物探方法适用条件及应用环境。结果表明:1)地面微动探测法在房屋密集区施工方便,在地层分层、软硬夹层、溶蚀发育区、断裂破碎带等地质条件下探测效果良好。2)跨孔弹性波CT在对溶洞以及孤石的划分,有较高的精度;在探测结果上,可与微动探测法相互印证,提高解释准确度。With the rapid development of urban rail transit in Guangzhou,many subway lines pass through under residential areas,industrial parks,urban villages and other dense housing areas.For areas where sparse drilling is restricted by site coordination or building and structure conditions,geophysical exploration can complete the formation information that otherwise cannot be obtained by drilling.This is of great significance to the safety of urban rail transit design and construction.In this paper,three geophysical examples of urban villages in Guangzhou were selected,where the micro-motion exploration method and elastic wave CT method were used to obtain the underground shallow information in the dense housing area.By analyzing the applicable conditions and application environments of different geophysical methods,the following conclusions are obtained:1)The microtremor exploration is convenient to operate in dense housing areas,and has good detection effect under geological conditions such as strata stratification,soft and hard interlayer,dissolution development area,fault fracture zone and so on;2)Cross-hole elastic wave CT has high accuracy in the division of caves and solitary stones.It can verify the detected results by the micro-motion detection method and improve the interpretation accuracy.

关 键 词：广州轨道交通 房屋密集区 微动勘探法 弹性波CT 

分 类 号：U239.5[交通运输工程—道路与铁道工程] P631[天文地球—地质矿产勘探]