摘要
在对深厚表土中地压计算公式总结的基础上,根据冻结凿井的施工力学行为过程探讨了深厚表土中地压特点;通过深部重塑土的高压K0固结水平加(卸)荷试验,获得了挤压(松弛)应力Ps与水平挤压(松弛)位移δ之间的关系式,并进一步分析了忽略挤压(松弛)应力Ps造成的深土地压及冻结壁厚度的计算误差;对深厚表土的地压应根据冻结凿井施工过程确定,以避免重大工程事故。
Based on summing up earth pressure calculating formulas in the deep and thick soils,the properties of earth pressure are presented according to the construction process of freezing engineering. In addition,the relations between extrusion （relaxation） displacement and extrusion （relaxation） stress Ps are obtained from horizontal loading （unloading） tests of remodeled deep soils experienced high pressure Ko consolidation and the calculating errors of earth pressure as well as thickness of frozen wall caused by neglecting P., are investigated too. The results indicate that earth pressure in deep and thick soils should be selected in accordance with the construction process of freezing engineering in order to avoid project accident.
出处
《岩土工程技术》
2008年第6期281-285,共5页
Geotechnical Engineering Technique
基金
国家自然科学基金重点项目"深厚表土层中人工冻结法凿井基础研究(50534040)"
国家科技支撑计划重点项目"深厚冲积层冻结法凿井技术(2006BAB16B01)"
江苏省普通高校研究生科研创新计划项目"深厚表土高压静止土压力系数试验研究(CX08B_103Z)"
关键词
深厚表土
地压
冻结壁厚度
误差
deep and thick soils
, earth pressure
thickness of frozen wall
errors
