摘要
在地铁隧道施工中常常遇到如地下空洞、暗河、建筑物桩等不良地质,不仅影响施工质量,而且存在重大安全隐患,因此需要对盾构掌子面开挖地质情况进行超前探测和预报。作者采用基于时域有限差分法FDTD(Finite-different time-domain)的雷达图像模拟软件GPRmax2D对盾构掌子面探地雷达探测过程中可能遇到的不良地质进行正演数值模拟,并对图像进行特征分析和规律总结,最后使用IDS-K2雷达对典型空洞和水泡进行实例分析,得到了有益结论,为盾构施工超前地质探测提供图像参考和依据。
Unfavorable geology such as underground cavity,underground river and building piles are often encountered during the construction of subway tunnel,which not only affects the quality of construction,but presents significant and potential dangers.In that case,it is necessary to carry out advanced exploration and prediction of geology for tunnel excavation of the shield driving face.In this paper,FDTD(Finite - different time - domain) and soft ware of CPRmax2D for radar image simulation were adopted to proceed with numerical simulation for unfavorable geology that may be encountered when the ground penetrating radar on shield driving face is exploring,and to carry out feature analysis and regularity summarization for the image.Finally,IDS - K2 radar was utilized to analyze the typical underground cavity and blister,and valuable conclusion was deduced which provides advanced geology exploration of shield construction with image reference and basis.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第A6期1110-1114,共5页
Chinese Journal of Underground Space and Engineering
基金
上海市协助项目(04-2185-1000)
校企合作项目(09-0984-1000)资助
关键词
探地雷达
时域有限差分法
模拟
识别
ground penetrating radar
finite-different time-domain
simulation
recognition
