地质与勘探2003，Vol.39Issue(z2)：221-230,10.
深层搅拌桩施工引起的周围粘土的土性变化
PROPERTY CHANGES IN SURROUNDING CLAYS DUE TO INSTALLATION OF DM COLUMNS
沈水龙 1黄醒春 1杜守继1
作者信息
- 1. 上海交通大学建筑工程与力学学院,上海,200030
- 折叠
摘要
Abstract
This paper has identified five major factors causing property changes in surrounding soils during and after installation of deep mixing columns: soil thixotropy, soil fracturing, cement penetration and diffusion,cementation, and consolidation. Laboratory tests were performed to investigate the effects of soil thixotropy, soil fracturing, and cementation in a soft marine clay - Ariake clay. Laboratory tests were conducted to evaluate property changes in surrounding clays due to installation of deep mixing columns. Test results showed that an influential zone of property changes existed in surrounding clay ranging from the edge of the columns to the distance of about twice the radius of the columns. Within this influential zone, water content decreased with a distance close to the columns while pH values increased. Test results also showed that undrained shear strengths of the surrounding clays decreased during mixing but regained after a 7 - day curing period and continued increasing in 28 days in this study.关键词
深层搅拌混合/周围土体/性质变化/劈裂/触变性/胶结作用/固结作用Key words
deep mixing/surrounding soils/property changes/fracturing/thixotropy/cementation/con-solidation分类
建筑与水利引用本文复制引用
沈水龙,黄醒春,杜守继..深层搅拌桩施工引起的周围粘土的土性变化[J].地质与勘探,2003,39(z2):221-230,10.
