以某水电站坝址岩体现场承压板试验为依据,通过对比分析两组岩质及岩体结构基本相同的岩体承压板变形试验的数据及结果,揭示了节理的存在和数量对岩体现场变形试验测试值的影响。在此基础上,采用数值模拟手段,探讨了层面裂缝间距、倾角对层状岩体变形模量的影响规律。研究成果对提高岩体现场变形试验的准确性及代表性具有较好的参考价值。
Simulating cylindrical rock masses specimens containing non-penetrating joints were created by using ANSYS/FLAC3D software . The method of simulating fractured rock masses was confirmed rationally by comparing the simulating uniaxial compression test results of a rock masses containing a single structural surface with the results of the real rock masses tests had been done before. Based on that,the im-pact of the non-penetrating joints on the compressive strength of rock mass specimens was revealed and the size effect features of the uniaxial compressive strength of the non-penetrating jointed rock mass with different inclination was revealed by simulating the uniaxial compression tests of the simulating cylindrical specimens with the different sizes and inclinations. When the non-penetrating joint inclinations changes between 45°~60°,the minimum uniaxial compressive strength is present. When the non-penetrating joint inclinations is 90°,the maximum uniaxial compressive strength is present. That is,when the non-penetrating joints is parallel with the stress direction,the impact on the u-niaxial compressive strength of a rock mass is lower. The changes pattern of the uniaxial compressive strength with the changes of the non-penetrating joints inclinations is basically the same although the sizes of the rock mass specimens are different. The uniaxial compressive strength of a rock mass containing non-penetrating joints is impacted larger by the joints inclinations. And the changes pattern is similar with the rock mass containing penetrating joints. Except the 90°inclinations rock mass,the uniaxial compressive strength of a rock mass con-taining non-penetrating joints exists a significant size effect features.
克孜尔水库的方山是主坝左肩和副坝右肩的联接段,由构造形成的方山分布有叠瓦断层、滑塌体、地裂缝等,工程地质条件复杂,对方山的工程地质勘察、评价直接影响到坝段坝线位置选择和工程建设,就方山工程地质勘察、工程地质条件评价及工程处理进行了论述.
新近系的砂岩、泥岩在新疆广泛分布,岩体膨胀对工程的建设影响较大;结合铜场水库工程导流洞岩性进行分类并取样试验,对导流洞岩体的膨胀性做出了分析和评价,为工程建设提供了基础设计资料.
1999年3月15日地震后,克孜尔水库主坝右坝肩排水廊道两侧潮湿区有明显上升趋势,排水廊道内渗水范围扩大,渗水点增多,廊道底板混凝土已被严重腐蚀,对右坝肩安全运行影响较大,经过采取合理的加固处理措施,排水廊道至今运行情况良好.
塔勒克河与新疆干旱区许多河流一样,也具有随流程的增加地表水量急剧损失的特点,但原因各有不同.在塔勒克引水工程闸址比选的各个阶段,上下闸址间集中渗漏问题一直倍受关注,此问题的焦点是下闸址在枯水期有多少水可引.本文通过调查实例介绍了此类问题的调查评价思路,主要采用常规水文工程地质调查方法取得调查结果,采用地质分析法、水文水均衡分析法推断得出渗漏通道位置和渗漏量,提出适宜布置闸址的河段和可引水量的结论.