金沙江某水电站地质构造及其对下游坝址的工程影响
|
摘要
某水电站工程场地位于金沙江中游河段内,属于高山峡谷地貌。坝址区前期受印支运动期NE向构造应力作用,后期又逐渐转向为NNE向。坝址区发育有其宗向斜褶皱构造,轴向延NW-SE向展布,由于枢纽方位与坝址区河谷方向近重合,其宗向斜控制了坝址区的岩层产状、地质构造展布。主要构造应力场的三向应力状态由"潜在逆断型"转变为"潜在走滑型"。地质构造的复杂,成为影响坝址选择及枢纽布置格局的关键因素。同时,对坝址区地质构造的研究,也为坝型设计的合理优化,提供了可靠的科学依据。
A hydropower station located on the middle reaches of Jinsha river. The topography belongs to alpine valley. In prophase of dam area endured with NE strike tectonic stress on Indosinian movement epoch, then gradually turned to NNE during anaphase. Dam area developped Qizong synclinal fold structure, axial direction spread NW to SE .For the direction of valley on dam area was approximately coincided with hinge of syncline, Qizong syncline controlled with rock attitude and spread of geological structure on dam site. Triaxial stress state turned "potential thrust type" to "potential strike-slip type" on main tectonic stress field. The geological structure was complicated which became a critical factor of influence on dam site selection and junction lay pattern. At the same time, the geological structure research on dam site also offered reasonable optimization of dam pattern.and give some sound scientifical evidences.
A hydropower station located on the middle reaches of Jinsha river. The topography belongs to alpine valley. In prophase of dam area endured with NE strike tectonic stress on Indosinian movement epoch, then gradually turned to NNE during anaphase. Dam area developped Qizong synclinal fold structure, axial direction spread NW to SE .For the direction of valley on dam area was approximately coincided with hinge of syncline, Qizong syncline controlled with rock attitude and spread of geological structure on dam site. Triaxial stress state turned "potential thrust type" to "potential strike-slip type" on main tectonic stress field. The geological structure was complicated which became a critical factor of influence on dam site selection and junction lay pattern. At the same time, the geological structure research on dam site also offered reasonable optimization of dam pattern.and give some sound scientifical evidences.
引文
[1]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.
[2]王士天.复杂环境中地质工程问题分析的理论与实践[M].成都:四川大学出版社,2002.
[3]徐开礼.构造地质学[M].北京:地质出版社,1989.
[4]谷德振.岩体工程地质力学基础[M].北京:科学出版社,1979.
[5]易明初.长江流域构造活动及地壳稳定性分区评价[J].地质力学学报,1989,(2).
[6]乔来禄.黄河小浪底坝段坝址选择的主要工程地质条件[J].人民黄河,1987,(6).
[7]何果佑.雅鲁藏布江彭错林至塔玛河段新构造运动及对工程的影响[J].水力发电,2005,(6).
[8]戚承志,王明洋,钱七虎,等.地质体构造层次变形破坏的动力特性及地震预报[J].岩石力学与工程学报,2007.
[9]王金龙,构造应力场回归分析方法及应用[J].新疆石油地质,2007,(5).
[10]汤献良,冯汉斌,杨海江,等.小湾水电站枢纽区工程地质条件[J].水力发电,2004,(10).
[2]王士天.复杂环境中地质工程问题分析的理论与实践[M].成都:四川大学出版社,2002.
[3]徐开礼.构造地质学[M].北京:地质出版社,1989.
[4]谷德振.岩体工程地质力学基础[M].北京:科学出版社,1979.
[5]易明初.长江流域构造活动及地壳稳定性分区评价[J].地质力学学报,1989,(2).
[6]乔来禄.黄河小浪底坝段坝址选择的主要工程地质条件[J].人民黄河,1987,(6).
[7]何果佑.雅鲁藏布江彭错林至塔玛河段新构造运动及对工程的影响[J].水力发电,2005,(6).
[8]戚承志,王明洋,钱七虎,等.地质体构造层次变形破坏的动力特性及地震预报[J].岩石力学与工程学报,2007.
[9]王金龙,构造应力场回归分析方法及应用[J].新疆石油地质,2007,(5).
[10]汤献良,冯汉斌,杨海江,等.小湾水电站枢纽区工程地质条件[J].水力发电,2004,(10).
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心