甘肃省会宁县跨祖厉河大桥地基土的快剪与固结快剪比对试验分析  

Comparative Test Analysis of Quick Shear and Consolidated Quick Shear of Foundation Soil of the Crossing Zuli River Bridge in Huining County,Gansu Province

作　　者：张程 Zhang Cheng(Gansu Water Conservancy and Hydropower Survey Design and Research Institute Co.,Ltd.,Lanzhou 730000,Gansu)

机构地区：[1]甘肃省水利水电勘测设计研究院有限责任公司,甘肃兰州730000

出　　处：《陕西水利》2021年第10期170-172,176,共4页Shaanxi Water Resources

摘　　要：正确地测定土的抗剪强度参数(内摩擦角φ,粘聚力c),在工程上具有重要意义。对甘肃省会宁县跨祖厉河大桥地基土料进行的快剪试验和固结快剪试验分析,得出固结快剪试验的抗剪强度高于快剪试验的抗剪强度。对快剪和固结快剪实验数据进行拟合分析表明:快剪的黏聚力增大固结快剪的黏聚力同时增大,快剪的黏聚力与固结快剪的黏聚力呈线性关系;快剪摩擦角增大固结快剪的摩擦角同时增大,快剪的摩擦角与固结快剪的摩擦角呈线性关系。说明快剪和固结快剪实验数值具有很强的相关性。地基评价和承载力计算时通常采用固结快剪的试验数据,当固结快剪试验条件缺乏时可利用快剪与固结快剪的相关性估算固结快剪数据,结果可供设计人员参考使用。The correct determination of the shear strength parameters(internal friction angleφ,cohesion c)of the soil is of great significance in engineering.This paper analyzes the quick-shear test and consolidation quick-shear test of the foundation soil of the bridge across the Zuli River in Huining County,Gansu Province.The results show that the shear strength of the consolidation rapid shear test is higher than that of the rapid shear test.The fitting analysis of the experimental data of fast shear and consolidated fast shear shows that the cohesive force of fast shear increases and the cohesive force of consolidated fast shear increases at the same time.There is a linear relationship between the cohesive force of fast shear and the cohesive force of consolidated fast shear.The friction angle of fast shear increases and the friction angle of consolidated fast shear increases at the same time.The friction angle of quick shear has a linear relationship with the friction angle of consolidated quick shear.This shows that the experimental values of fast shear and consolidated fast shear have a strong correlation.Consolidation rapid shear test data is usually used in foundation evaluation and bearing capacity calculation.When the conditions of the consolidation fast shear test are lacking,the correlation between the fast shear and the consolidation fast shear can be used to estimate the consolidation fast shear data,and the results can be used for reference by the designer.

关 键 词：快剪试验 固结快剪试验 黏聚力c 摩擦角φ 相关性 

分 类 号：TU411[建筑科学—岩土工程]