长江科学院院报2013，Vol.30Issue(2)：31-34,4.DOI:10.3969/j.issn.1001-5485.2013.02.007
三河口水利枢纽工程坝址区河谷应力场分析研究
In-situ Stress in the River Valley of Dam Site of Sanhekou Hydro-Junction
摘要
Abstract
Sanhekou Hydro-junction project is located in the river valley of east Qinling area. Complex geological structure and topography determines the complexity of in-situ stress distribution. To investigate the distribution of in-situ stress, hydraulic fracturing test was carried out on 3 boreholes in the slopes of both abutments and the river bed. Measured results show that the stress values are relatively large in buried depth of 0-50m in borehole at the river bed, and elevation of 500-530m in the boreholes at both banks, which can be designated as increased stress zone. Meanwhile, the area of buried depth under 50m in the borehole of river bed and elevation under 500m in the boreholes of both banks can be designated as original stress zone. In the shallow rockmass under the riverbed, the orientation of maximum horizontal principal stress is nearly perpendicular to the river trend, and with the increase of burial depth, it is close to the direction of regional structure. In the surface rockmass of slope, the direction of maximum horizontal principal stress intersects with the river trend at an small angle, and with the increase of burial depth, it transits to the northeast gradually. In deep buried rock mass, the direction of maximum horizontal principal stress is close to the regional tectonic.关键词
三河口水利枢纽工程/地应力/区域构造Key words
Sanhekou hydro-junction project/ in-situ stress/ regional tectonic分类
建筑与水利引用本文复制引用
赵宪民,尹健民,李永松,周春华..三河口水利枢纽工程坝址区河谷应力场分析研究[J].长江科学院院报,2013,30(2):31-34,4.基金项目
国家重点基础研究发展计划973项目(2011CB710603) （2011CB710603）
水利部公益性行业科研专项项目(201001009) （201001009）
中央级公益性科研院所基本科研业务费项目(CKSF2011020/YT) （CKSF2011020/YT）
