应变软化Tresca材料中扩孔问题解答及其应用
注意：本论文已在《岩土力学》2004, 25(2): 261-265发表
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梁发云, 陈龙珠
（上海交通大学建工学院 安全与防灾工程研究所，上海，200030）
摘要： 依据常规试验成果，对岩土材料的剪胀、剪缩和应变软化特性进行简化后，利用弹塑性理论和体积平衡原理，推导
出应变软化Tresca 材料中扩孔问题的一般解答，并分析了不排水饱和土扩孔问题的规律性，对解决诸如沉桩挤土效应等工程
问题具有一定的应用价值。
关键词： 剪胀；应变软化；Tresca 屈服准则；扩孔；饱和软粘土
中图分类号：TU 473
Analytical solution to cavity expansion in strain-softening soils with Tesca yield criterion and its applications
LIANG Fa-yun, CHEN Long-zhu
（ Institute of Disaster Prevention, School of Civil Engineering and Mechanics, Shanghai Jiaotong University, Shanghai 200030, China ）
Abstract: Based on conventional experiment results, a simplified constitutive model is given to simulate the strain-softening and shear dilating characters of soils. By using elastoplastic theory and volume-balance equation, an analytical solution to cavity expansion of saturated clays is established with Tresca yield criterion. The regularities of cavity expansion in saturated clays are analyzed under undrained condition. The results have practical significances for analyzing engineering problems such as static piling in clays.
Key words: shear dilation; strain-softening; Tresca yield criterion; cavity expansion; saturated clays
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