红层软岩水平抗力系数确定方法探讨  

Study on determination method of horizontal resistance coefficient of red bed soft rock

作　　者：刘海军 王新 刘蕴琨 Liu Haijun;Wang Xin;Liu Yunkun(China Southwest Geotechnical Investigation&Design Institute Corporation,Chengdu 610059,China)

机构地区：[1]中国建筑西南勘察设计研究院有限公司,成都610059

出　　处：《工程勘察》2023年第3期17-20,共4页Geotechnical Investigation & Surveying

摘　　要：本文分析了现行标准水平抗力系数现场测试方法的异同,考虑室内外试验岩体完整性和尺寸效应,建立采用岩石弹性模量等参数快速确定水平抗力系数的方法,同时依托重庆江北国际机场项目对推导公式进行了验证,并结合8个典型项目进一步印证判断新方法的适用性。研究结果表明:江北机场红层软岩水平抗力系数现场测试值为242.5MPa/m;采用岩石弹性模量等参数确定的水平抗力系数与现场实测值基本一致,为经验值的2.2倍;该计算方法在其它8个工程实例中同样适用。本文建立的计算方法可靠、合理,对工程设计具有参考价值。The similarities and differences of the field test methods to determine the lateral resistance coefficient in current standards was analyzed. Considering the rockmass integrity and size effect on laboratory and field test results, the horizontal resistance coefficient is quickly determined by the parameters such as elastic modulus of rock. At the same time, based on Chongqing Jiangbei International Airport project, the derived formula is verified, and the applicability of the new method is further verified in eight typical projects. The results show that the horizontal resistance coefficient of red bed soft rock in Jiangbei Airport is 242.5MPa/m. The horizontal resistance coefficient determined by rock elastic modulus and other parameters is basically consistent with the field measured value, which is 2.2 times of the empirical value. The calculation method is also applicable to the other 8 projects. The calculation method established in this paper is reliable and reasonable, and could be referred by the similar design.

关 键 词：软岩 水平抗力系数 弹性模量 修正系数 计算方法 

分 类 号：TU45[建筑科学—岩土工程]