摘要
在灰岩地区,岩溶较发育,且岩溶形态、延伸及分布缺乏规律。采用钻探方法很难查明地下岩溶的发育情况,故物探技术成为了岩溶勘察的首选方法。基于管波探测法的基本原理,并结合深圳市城市轨道交通16号线田心车辆段桩基岩溶勘察的应用效果,说明采用管波探测法可以快速、有效地判定基岩面埋深,端承桩桩端持力层,以及孔旁岩溶的发育情况,它更有利于指导岩溶注浆和桩基设计方案的变更。该方法具有易解释、精度高、分辨率强、成本低等优点。
In limestone area,karst is relatively highly developed,and the karst morphology,extension and distribution are lack of regularity.It is difficult to find out the development of underground karst by drilling method,so geophysical prospecting technology has become the favoured method for karst exploration.Based on the basic principle of tube wave detecting method and combined with the application effect of pile bedrock solution investigation in Tianxin depot of Shenzhen urban rail transit line 16,this paper illustrates the effectiveness and accuracy of tube wave detecting method in determining the buried depth of bedrock surface,the bearing stratum at the end of end bearing pile,and the development of karst around the hole,which is more conducive to guiding karst grouting and the change of pile foundation design scheme.This method has the advantages of easy interpretation,high precision,high resolution and low cost.
作者
海洋
Hai Yang(Gansu Railway Engineering Survey Institute Limited Co.,Lanzhou Gansu 730000,China)
出处
《工程地球物理学报》
2021年第5期761-773,共13页
Chinese Journal of Engineering Geophysics
关键词
岩溶
桩基础
桩端持力层
管波探测法
karst
pile foundation
pile end bearing stratum
tube wave detecting method
