摘要
以往的冻结法在淤泥质土及特殊工程土体中,由于所需的冻结温度低、冻结扩展速度慢、形成冻结壁的强度低等原因,在施工时容易出现片帮、底鼓、突水、涌砂等事故。轻则影响工程进度,重则造成严重的经济损失。针对此类问题,提出了用三圈冻结法优化淤泥质土深基坑开挖的方案,并应用大型数值模拟软件ADINA进行模拟分析。对普通冻结法、连续桩及三圈冻结法等围护结构的位移进行了对比,得出三圈冻结法围护结构不仅最大位移小,而且位移随深度变化平稳。
As the low freezing temperature required, freeze the expansion of slow, the low intensity of frozen wall, the usual freezing programs used in muddy soil and other special soil often bring about spalling, floor heave, water inrush, Chung sand accident in the construction prone, affecting the progress, even leading to serious economic losses Aiming at this kind of problems, the optimization freezing program of muddy soil deep foundation is proposed. Large-scale simulation analysis simulation software ADINA is used to compare the displacement of envelope of ordinary freezing, continuous piles and three circle freezing. The results show that the displacement of three circle freezing envelope is not only small, but also changing steady with depth.
出处
《世界科技研究与发展》
CSCD
2012年第5期798-800,806,共4页
World Sci-Tech R&D
基金
国家自然科学基金(50978131)
辽宁省教育厅科学技术研究重点实验室项目(2008S114)
辽宁省高等学校优秀人才支持计划项目(2008RC23)资助
关键词
冻结法
淤泥质土
深基坑
优化方案
freezing method
mud
deep foundation
optimization program
