(1 安徽理工大学土木建筑学院, 淮南 232001； 2 上海强劲地基工程股份有限公司， 上海 200233)

［摘要］研究了在软土地基加固中注浆的压力，根据一般形式的破坏准则，结合超孔隙水压力公式、扩孔和大变形理论推导了软土劈裂注浆压力的理论公式，分析了在不同破坏准则下软土劈裂注浆压力的变化情况。通过对现场试验测得的注浆压力值与注浆压力理论值对比，得出基于Lade-Duncan强度准则和M-C强度准则的注浆压力理论值与现场试验值较为接近，但仍存在一定误差。于是基于Lade-Duncan、SMP和M-C强度准则对试验土层的破坏准则进行了修正，建立了适用于该土层的破坏准则，并提出了一种简单有效的修正方法, 为理论研究和工程实践提供了一定的指导意义。

［关键词］强度准则修正； 劈裂注浆； 注浆压力； 软土加固

中图分类号： TU472.6 文献标识码： A文章编号：  1002-848X(2016)S2-0535-05

Correction of strength criterion for fracture grouting of soft soil

Chen Yue1,2， Hua Xiaoman1， Du Xiaoli1

(1 School of Civil Engineering and Architecture, Anhui University of Science and Technology， Huainan 232001， China;

2 Shanghai Strong Foundation Engineering Co., Ltd., Shanghai 200233, China)

Abstract： The grouting pressure of soft soil foundation reinforcement was studied. According to the general form of soil failure criterion, excess pore water pressure formula, reaming theory and large deformation theory, the theoretical formula for soft soil fracture grouting pressure was established, and the changes of soft soil fracture grouting pressure with different failure criterias were analyzed. The field test value of grouting pressure was compared with the theoretical value derived from the Lade-Duncan strength criterion and the M-C strength criterion, and it is concluded that the experimental value and the theoretical value are close, but there are still some errors. Based on Lade-Duncan strength criterion, SMP strength criterion and M-C strength criterion, the failure criterion of the soil was revised and established, which provided a simple and effective method. This has a certain guiding significance for theoretical research and engineering practice.

Keywords: strength criterion revision; fracture grouting; grouting pressure; soft soil reinforcement

作者简介： 陈越，硕士研究生，Email：yuechen93716@163.com。

*中国博士后科学基金资助项目(2013M541811)，安徽省教育厅自然科学重大项目（KJ2015ZD20）。