Application of Cross-borehole Integrated Geophysical Methods for the Detailed Investigation of Karst in Urban Metro Construction
Application of Cross-borehole Integrated Geophysical Methods for the Detailed Investigation of Karst in Urban Metro Construction
复制标题
跨孔综合地球物理方法在城市地铁建设中岩溶详查中的应用
DOI：
10.2113/jeeg24.04.03.525
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发表时间：
2019-12
影响因子：
1
通讯作者：
Chuan Ren
中科院分区：
文献类型：
--
作者：
Jun Zhang;Shengdong Liu;Qinghua Chen;Bo Wang;Chuan Ren
随着我国地铁建设的迅猛发展，城市地下岩溶的发育对相关隧道施工和公共安全构成了严重威胁，隧道施工突泥、突水和城市地面沉降事件时有发生。由于复杂、城市、浅层的地质条件和施工环境，常规物探方法无法满足小尺度、非均质复杂地质体的高精度探测要求。在数值模拟的基础上，综合应用了井间电阻率层析成像（ERT）和井间地震CT（CT）技术，对杭阜城际铁路沿线的城市地下岩溶进行了勘察。结果表明：1）在有限的城市建设条件下，采用先进的地球物理监测设备，大大提高了施工效率; 2）利用钻探地质成果标定异常地球物理场属性参数（包括波速和电阻率），提高了岩溶勘探的精度，减少了地球物理多解释效应的缺陷;（3）利用速度剖面和电阻率剖面的联合对比解释，可以区分和解释岩溶发育带和裂缝发育带; 4）共获得速度、电阻率剖面550对，发现溶洞异常258处，裂缝发育带5条，综合探测精度超过1 m。因此，高精度联合跨孔层析成像技术对指导城际铁路建设具有重要意义。
With the significant development of China's metro construction, the development of urban underground karst poses a serious threat to related tunnel construction and public safety, with frequent occurrences of mud and water inrushes during tunnel construction and urban ground subsidence events. Because of the complex, urban, and shallow geological conditions and construction environments, conventional geophysical methods cannot meet the requirements for high-precision detection of small-scale and inhomogeneous complex geological bodies. Based on numerical simulation, herein we comprehensively applied both cross-borehole electrical resistivity tomography (ERT) and cross-borehole seismic computed tomography (CT) to urban underground karst surveys of the Hangzhou-Fuyang intercity railway. The results showed that: 1) under limited urban construction conditions, the use of advanced geophysical monitoring equipment greatly improved construction efficiency; 2) utilizing drilling geological results to calibrate the abnormal geophysical field attribute parameters (including wave velocity and resistivity) improved the accuracy of karst exploration and reduce defective geophysical multi-explanation effects; 3) applying the joint comparative explanation of both velocity and resistivity profiles can distinguish and explain karst and fracture development zones; 4) 550 pairs of velocity and resistivity profiles were obtained which revealed 258 karst cave anomalies and 5 fracture development zones which integrated detection accuracy exceeded the 1 m level. Thus, the high-precision joint cross-borehole tomography technology was shown to be useful for guiding intercity railway construction.
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影响因子：
7.4
作者：
O. Pueyo-Anchuela;M. Juan;A. Casas‐Sainz
通讯作者：
O. Pueyo-Anchuela;M. Juan;A. Casas‐Sainz
影响因子：
1.6
作者：
E. Cardarelli;M. Cercato;G. D. Donno;G. D. Filippo
通讯作者：
E. Cardarelli;M. Cercato;G. D. Donno;G. D. Filippo
中国岩溶地质及溶洞盾构施工地质灾害防治措施
影响因子：
3.7
作者：
Cui, Qing-Long;Wu, Huai-Na;Ye, Guan-Lin
通讯作者：
Ye, Guan-Lin
影响因子：
7.4
作者：
M.J.S Roth;J.R Mackey;C. Mackey;J.E Nyquist
通讯作者：
M.J.S Roth;J.R Mackey;C. Mackey;J.E Nyquist
影响因子：
2.6
作者：
E. Cardarelli;M. Cercato;A. Cerreto;Gerardina Di Filippo
通讯作者：
E. Cardarelli;M. Cercato;A. Cerreto;Gerardina Di Filippo