摘要
基坑开挖,坑底被动区土体卸荷,坑底一定范围内土体强度降低较大,竖向回弹量较大、侧压力发生变化较大,这些将对基坑的变形产生不利影响。以卸荷试验为基础,根据直剪试验中受卸荷影响最大深度、常规固结试验中的强回弹深度、K0固结试验中的侧压力变化较大提出了上海软土地区基坑工程中被动区土体的合理加固深度;并通过计算及工程实践加以验证。得出的结论对该类地区受卸荷影响的基坑工程的加固设计具有参考价值。
Based on the unloading experiments and according to the extreme depth affected by unloading in the direct shear tests, the strong rebound depth in the conventional consolidation tests and the large depth with varying lateral pressures in K0 consolidation tests, the proper stabilization depth of soil in passive area of foundation pits was put forward, and was verified through calculation and engineering practice. The obtained results were valuable to the reference for engineering design of stabilization affected by unloading.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2008年第6期935-940,共6页
Chinese Journal of Geotechnical Engineering
关键词
软土地区
基坑开挖
被动区土体
加固深度
soft-clay area
excavation of foundation pits
soil in passive area
stabilization depth
