渗流引起的筒型基础土体软化分析  

An Analysis of Soil Soften of Bucket Foundation Caused by Seepage

作　　者：丁红岩[1] 张超[1] 杨柏松[1] 

机构地区：[1]天津大学建筑工程学院土木工程系,天津300072

出　　处：《海洋技术》2005年第4期63-67,共5页Ocean Technology

基　　金：国家自然科学基金资助项目(50079016)

摘　　要：筒型基础在施工下沉过程中,负压水头值随着贯入深度的增加而逐渐加大,通过有限元法进行了不同下沉阶段的渗流场计算;总结了渗流场的基本特点并建立渗流场方程;由计算出的速度和梯度通过水土相互作用的微观分析,确定不同下沉阶段的土体软化范围;结合土力学的基本理论,通过土的基本物理指标在软化后的变化确定土的软化程度;最后通过算例计算方法的正确性和理论的合理性。During the construction period of the bucket foundation penetration, the negative water level becomes high with penetrating. The seepage field in different penetration phrases is calculated by finite element method, and the characteristic of the bucket foundation seepage is summarized, the flow equation is established. The thesis first determines the range of soil soften in different phrase by the microscopic analysis of the water soil action using the speed and gradient calculated earlier. Second determines the degree of soil soften by the variety of the soil＇s physical index after soil soften combines the basic theories of soil mechanics. At last, the examples are listed to demonstrate the accuracy of the program and the rationality of the proposed method.

关 键 词：筒型基础 负压沉贯 渗流场 软化 强度 

分 类 号：D357.3[政治法律—政治学] P75[政治法律—国际共产主义运动]