摘要
强风化花岗岩在某核电站厂址区普遍发育,研究其剪切强度对于核岛边坡及常规岛地基的稳定性评价具有重要意义。由于该岩体风化不均匀,常夹有中等风化及微风化较硬夹层或球状风化体,扰动后即碎裂,现场取样和室内试样的难度较大,而且目前进行岩体强度参数反分析的资料相对匮乏。本文作者通过设计堆载式加荷直剪试验方法,并经野外大量现场试验,获得了强风化花岗岩原位直剪的剪应力—应变关系曲线,对强风化花岗岩的剪切强度性质进行了相应的理论分析,为工程区强风化花岗岩设计输入提供了可参考的c、φ值,保证了工程的可靠性,也避免过于保守,并为类似工程积累了经验。
There are large areas of highly weathered granites existed in the site for certain nuclear power station. The shear strength properties of the highly weathered granite are very important to the stability analysis for the slope of the nuclear islands and the ground of convention islands. Owing to the non-uniform weathering of the rocks and the disintegrating after disturbance, it is difficult to sample in field and to test in laboratory. The direct shear tests with stack loading are put forward and a number of field tests are carried out. The stress-strain relation curves for the highly weathered granites are obtained and the shear strength parameters （c and φ） are gotten, which ensure the reliability of engineering and avoid the conservative design.
出处
《工程勘察》
CSCD
北大核心
2009年第12期40-43,共4页
Geotechnical Investigation & Surveying
关键词
原位直剪试验
强风化花岗岩
核电站
in-situ direct shear test
highly weathered granite
nuclear power station
