摘要
为解决现有人工冻结法施工后周围地层产生冻胀融沉所引发的不良后果问题,设置加热限位管对冻土帷幕的发展进行限制。运用有限元软件分析在冻土帷幕主面上设置加热限位管时对冻土帷幕温度场发展的影响规律,主要得出：随着加热限位管盐水温度的升高,冻土帷幕厚度呈线性减小趋势;限位管循环盐水温度越高,最终形成的冻土帷幕边界平整性就越好,从而具有较好的限位效果;限位管应与冻结管对齐设置在冻土帷幕主面上;限位管与冻结管距离由最终控制冻土帷幕的厚度决定;循环热盐水的温度不宜过高,宜为5~10℃。
The thermal limiting pipes are used to lay restrains on the development of frozen soil curtain. The influencing rules of thermal limiting pipe on development of frozen soil curtain are analyzed by means of finite-element method. The conclusions are drawn as follows： 1） The frozen soil curtain thickness decreases linearly as the water temperature of thermal limiting pipe increases. 2） A more even boundary of the frozen soil curtain can be obtained under a higher temperature of the water of thermal limiting pipes. 3） The thermal limiting pipes should be aligned perpendicularly to the freezing pipes. 4） The distance between thermal limiting pipe and freezing pipe is controlled by the thickness of frozen soil curtain. 5） The temperature of thermal limiting pipes is recommended to be 5-10 ℃.
出处
《隧道建设》
北大核心
2016年第6期688-694,共7页
Tunnel Construction
基金
中国博士后科学基金资助项目(2015M580559)
海南省科技项目(ZDXM2015117)
海南省重点研发计划科技合作方向项目(ZDYF2016226)
关键词
加热限位管
冻土帷幕
温度场
冻结法
冻胀融沉
数值模拟
thermal limiting pipe
frozen soil curtain
temperature field
ground freezing method
heaving thaw settlement
numerical simulation
