金沙江虎跳峡水电站上江坝址若干关键工程地质问题研究
|
摘要
上江坝址是虎跳峡高坝替代方案的比选坝址,是虎跳峡河段重点研究的开发方案之一。该坝址区域构造背景复杂,河床覆盖层深厚,两岸坝肩发育特大型滑坡,工程地质问题突出。对大量野外工程地质勘察资料的分析表明:工程区域虽然断裂构造发育,地震活动较频繁,但坝址避开了区域主干断裂和活动断层,位于地质构造相对稳定的地块,适宜建坝;在深厚的河床覆盖层上建高土石坝面临的关键技术问题为沉降变形和防渗处理,需采用尖端的筑坝技术;左右坝肩分布的滑坡整体稳定性较好,对大坝存在的影响主要为沉降变形、渗漏、高边坡稳定性等,筑坝技术难度较大。研究结果为上江坝址筑坝技术研究和该河段水电开发方案坝址选择提供了依据,对类似水电工程地质研究具有较好的参考意义。
The Shangjiang dam site, for Tiger Leaping Hydropower Project is one of the options of the high dam sites. The engineering geological problems of this dam site are very complication, such as complicated areal structure background, thick overburden in river bed, occurring of large-scale landslides on both dam abutments, etc. Based on geological investigation some conclusions were attained: (1) the faults are developed, the earthquakes are active, but the dam site is far away from the major fault and located at a relatively stable area, which is suitable for the construction. (2) the key problems for ensuring the safety of the dame are the controlling of settlement deformation, the seepage-proofing and the construction technology. (3) the stability of the landslides on both dam abutments is fine.
The Shangjiang dam site, for Tiger Leaping Hydropower Project is one of the options of the high dam sites. The engineering geological problems of this dam site are very complication, such as complicated areal structure background, thick overburden in river bed, occurring of large-scale landslides on both dam abutments, etc. Based on geological investigation some conclusions were attained: (1) the faults are developed, the earthquakes are active, but the dam site is far away from the major fault and located at a relatively stable area, which is suitable for the construction. (2) the key problems for ensuring the safety of the dame are the controlling of settlement deformation, the seepage-proofing and the construction technology. (3) the stability of the landslides on both dam abutments is fine.
引文
[1]王启国.金沙江虎跳峡河段水电开发重大工程地质问题研究[J].岩土工程学报,2009,31(8):1292-1298.
[2]夏金梧,赵成生,邓瑞生.虎跳峡工程近场区断裂活动性与地震危险分析[J].人民长江,2002,33(6):22-24.
[3]王启国.金沙江虎跳峡河段河床深厚覆盖层成因及工程意义[J].岩石力学与工程学报,2009,28(7):1455-1466.
[4]王启国,孙云志,刘高峰.金沙江上江坝址河床粘土层特性及工程意义[J].水文地质工程地质,2009,36(4):71-74.
[5]王启国,马贵生,杨启贵.金沙江虎跳峡上游大型古堰塞湖对河段水电开发的影响[J].水利学报,2010,41(11):1310-1317.
[6]王启国,刘高峰,严绎强,等.金沙江某坝址左坝肩大型地质异常体的认识[J].长江科学院院报,2010,27(8):50-53.
[7]王启国,刘高峰,宋斌,等.海排滑坡基本特征及对上江坝址枢纽工程的影响[J].资源环境与工程,2009,23(1):28-31.
[8]陈厚群,徐泽平,李敏.汶川大地震和大坝抗震安全[J].水利学报,2008,39(10):1158-1167.
[9]长江勘测规划设计研究院.金沙江其宗—上江河段筑坝技术研究[R].武汉:长江勘测规划设计研究院,2008.
[2]夏金梧,赵成生,邓瑞生.虎跳峡工程近场区断裂活动性与地震危险分析[J].人民长江,2002,33(6):22-24.
[3]王启国.金沙江虎跳峡河段河床深厚覆盖层成因及工程意义[J].岩石力学与工程学报,2009,28(7):1455-1466.
[4]王启国,孙云志,刘高峰.金沙江上江坝址河床粘土层特性及工程意义[J].水文地质工程地质,2009,36(4):71-74.
[5]王启国,马贵生,杨启贵.金沙江虎跳峡上游大型古堰塞湖对河段水电开发的影响[J].水利学报,2010,41(11):1310-1317.
[6]王启国,刘高峰,严绎强,等.金沙江某坝址左坝肩大型地质异常体的认识[J].长江科学院院报,2010,27(8):50-53.
[7]王启国,刘高峰,宋斌,等.海排滑坡基本特征及对上江坝址枢纽工程的影响[J].资源环境与工程,2009,23(1):28-31.
[8]陈厚群,徐泽平,李敏.汶川大地震和大坝抗震安全[J].水利学报,2008,39(10):1158-1167.
[9]长江勘测规划设计研究院.金沙江其宗—上江河段筑坝技术研究[R].武汉:长江勘测规划设计研究院,2008.
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