大厚度湿陷性黄土场地地基处理合理深度  

Reasonable treatment depth for foundation of collapsing loess with a large thickness

作　　者：张豫川[1,2] 赵伟[1,2,3] 熊靖辉[4] 

机构地区：[1]兰州大学西部灾害与环境力学教育部重点实验室,兰州730000 [2]西安理工大学水利水电学院,西安710048 [3]武警工程学院建筑工程系,西安710086 [4]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《兰州大学学报（自然科学版）》2009年第2期31-35,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：教育部重点实验室开放基金项目(200704)

摘　　要：以全部剩余湿陷量作为处理深度经济上是不合理的.基于人工地基具有一定的抵御湿陷变形能力的观点,通过建立人工地基应力应变关系的数学模型,计算分析了湿陷性黄土场地人工地基在发生剪切破坏时的湿陷面积和处理深度的关系及规律.结果表明:人工地基抵御湿陷变形的能力随处理深度的增大而增强,当处理深度达12 m以上时,抵御能力的增加已很小.在剩余湿陷量仍大于规范要求时,选择12 m作为地基处理的合理深度,在安全和经济上是可行的.It was held that tread soil has the capability of resisting deformation caused by collapsibles and that using the remnant collapse as a foundation reinforcing depth is uneconomical. Through the establishment of stress and strain relation of a mathematical model of artificial foundation, the calculations were analyzed regarding the relation and rule of the collapsible loess of artificial foundation on the site of shear damage of collapsible area and reinforcing depth. The results show that artificial foundation resistence capacity of deformation caused by collapsibles was enhanced with the increasing depth and, when the reinforcing depth was at 12 m or above, the increasing resistance was little. When the remnant collapse was still higher than the code requirements, selecting 12 m as a minimum reasonable reinforcement depth was safe and economical.

关 键 词：大厚度湿陷性黄土 应力应变关系 剪切破坏 剩余湿陷量 合理处理深度 

分 类 号：TU444[建筑科学—岩土工程]