青藏铁路L型挡土墙的土压力实测与分析

青藏铁路L型挡土墙的土压力实测与分析 English Version

基金项目: 铁道部科技攻关项目 (2 0 0 1G0 0 1 -A - 0 1 ) ;;兰州交通大学“青兰工程”基金资助项目

1.Civil Engineering School of Lanzhou Jiaotong University Lanzhou 730070 China 2.The First Railway Survey Design Institute Lanzhou Lanzhou 730070 China

摘要: 结合青藏铁路格拉段目前唯一的支挡结构———L型挡墙这一工程措施 ,对墙后土压力或冻胀力进行了一个冻融循环期的现场测试。同时 ,研究了土压力和冻胀力的几种分析模式。对比分析表明 ,多年冻土区的墙后实际受力状态远大于设计应力状态。因此 ,结合多年冻土的特点 ,提出了考虑破裂滑动楔体以外可能的其他作用力修正分析模型 ,为今后类似工程的设计、施工提供了参考依据。
- 多年冻土 /
- L型挡墙 /
- 土压力 /
- 冻胀力 /
- 现场测试 /
- 分析模型
Abstract: In this paper, considering the retaining structure—L type retaining wall used in section from Golmud to Lhasa, Qinghai-Tibet railway,we test the earth pressure or frost-heave in a frost-thaw cycle for one year,and we study several different analytic models of earth pressures and frost-heave.Compared with site test and theoetical analysis, we know that the actual earth pressure is large than the designed earth pressure.Then a revised analytic model of earth pressure is put forward,which could consider other possible force outside slide medge.This model could give a reference to some similar engineering projects.
- permafrost /
- L type retaining wall /
- earth pressure /
- frost-heaving force /
- site test /
- analysis model