深土地压及对冻结壁厚度的影响
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。
Abstract: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 Ps, 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.
中文标题:
深土地压及对冻结壁厚度的影响
Earth Pressure in Deep Soils and Influences to Thickness of Frozen Wall
作者:
赵晓东,周国庆,徐志伟
Zhao Xiaodong,Zhou Guoqing,Xu Zhiwei
作者简介:赵晓东,1981年生,男,岩土工程专业博士研究生,主要从事深土力学、冻上力学与工程方面的研究。
通讯地址:
中国矿业大学深部岩土力学与地下工程国家重点试验室, 江苏徐州 221008
StateKeyLaboratoryforGeomechanicsandDeepUndergroundEngineering,CUMT,XuzhouJiangsu221008China
中图分类号:TU411;TU432
出版物:岩土工程技术
收稿日期:2008-08-28
网络出版日期:2021-07-07
关键词:深厚表土,地压,冻结壁厚度,误差
Key words:deep and thick soils,,earth pressure,thickness of frozen wall,errors
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基金项目:
基金项目: 江苏省普通高校研究生科研创新计划项目“深厚表上高压静止上压力系数试验研究(CX08B_103Z)” 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)”;国家科技支搾计划重点项目“深厍冲积层冻结法凿井技术(2006BABl6B0l)”
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