| 新加坡地应力测量 |
| |
| 引用本文： | 孟文,陈群策,杜建军,丰成君,秦向辉,安其美.新加坡地应力测量[J].地球物理学报,2012,55(8):2611-2619. |
| |
| 作者姓名： | 孟文 陈群策 杜建军 丰成君 秦向辉 安其美 |
| |
| 作者单位： | 1. 中国地质科学院地质力学研究所, 北京 100081;2. 国土资源部新构造运动与地质灾害重点实验室, 北京 100081;3. 中国地震局地壳应力研究所, 北京 100085 |
| |
| 基金项目： | 国家深部探测技术与实验研究专项项目(Sinoprobe-06-03);中国地质科学院地质力学研究所基本科研业务费项目(DZLXJK201107);公益性行业科研专项经费项目(200811070)联合资助 |
| |
| 摘 要： | 2008年和2009年, 通过和新加坡宜康地质技术有限责任公司合作, 在新加坡18个浅钻孔中进行了水压致裂地应力测量. 通过测量获得了新加坡地壳浅部的现今应力状态, 为新加坡拟建地下管缆隧道设计施工提供了地应力依据, 也为世界应力环境数据库提供了参考. 测试结果表明, 在38.00~56.95 m深度域内最大水平主应力σh值为3.45~9.64 MPa, 最小水平主应力σh为2.49~6.28 MPa. 水平主应力和用上覆岩层重量计算的垂直应力σv之间的关系为σh>σh>σv,最大、最小水平主应力平均值分别是垂直应力平均值的5.13倍和3.23倍, 表明新加坡应力场以水平应力为主导. 初步分析认为, 新加坡陆域浅部构造应力场的量值大致呈南、北两端偏低, 中间高的态势, 在北端最大与最小水平主应力值都小于它们各自的平均值, 而南端则与平均值相当. 最大水平主应力优势方向为NE—NEE向, 该方向与前人在其邻区获得的构造应力场方向和由震源机制解反映的主压应力方向较为一致. 新加坡现今构造应力场状态与印度板块、澳大利亚板块、菲律宾板块与欧亚板块的汇聚作用有着密切的联系. 根据库仑摩擦滑动准则, 断层面摩擦系数取0.6~1.0, 分析了研究区内断层产生摩擦滑动的可能性.
|
| 关 键 词： | 新加坡 水压致裂法 地应力测量 摩擦滑动 |
| 收稿时间： | 2011-12-19 |
In-situ stress measurement in Singapore |
| |
| MENG Wen
,
CHEN Qun-Ce
,
DU Jian-Jun
,
FENG Cheng-Jun
,
QIN Xiang-Hui
,
AN Qi-Mei.In-situ stress measurement in Singapore[J].Chinese Journal of Geophysics,2012,55(8):2611-2619. |
| |
| Authors: | MENG Wen CHEN Qun-Ce DU Jian-Jun FENG Cheng-Jun QIN Xiang-Hui AN Qi-Mei |
| |
| Institution: | 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;2. Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resources, Beijing 100081, China;3. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China |
| |
| Abstract: | In the year 2008 and 2009, in-situ stresses were measured in 18 boreholes by the hydraulic fracturing method to determine the present-day stress state of the shallow crust in Singapore, which provide key parameters for the design and construction of underground tunnels and data for the study of world stress environment. The test results show that at depths ranging from 38.00~56.95 m, the maximum horizontal principal stress σh is 3.45~9.64 MPa, and the minimum horizontal principal stress σh is 2.49~6.28 MPa. The relative stress magnitudes are σh>σh>σv, and the mean values of maximum horizontal principal stress and minimum horizontal principal stress are respectively 5.13 and 3.23 times the vertical stress, which reveals that the horizontal stress is dominant. The magnitudes of the tectonic stress field in the shallow crust of Singapore exhibit heterogeneity, which are low in the north and south and high in the middle. The maximum and minimum principal stresses are both lower than their mean values in the northern end, and are well matched in the southern end. The dominant direction of the maximum principal tectonic stress is NE—NEE, in agreement with the orientation of the tectonic stress field and that from focal mechanism solutions in adjacent areas from previous work. The current stress state of Singapore has a close relationship with convergence of the India, Australia, Philippine and Eurasia plates. According to Coulomb friction criteria, and taking the friction coefficient as 0.6~1.0, the possible slide on the faults in Singapore has been analyzed in this work. |
| |
| Keywords: | Singapore Hydraulic fracturing In-situ stress measurement Frictional sliding |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
