铁道科学与工程学报2017，Vol.14Issue(12)：2670-2677,8.
盾构隧道壁后注浆球孔压滤扩散模型
Spherical cavity pressure filtration expansion model of the back-filled grouts in shield tunnel
王朝亮 1苟长飞1
作者信息
- 1. 温州市铁路与轨道交通投资集团有限公司,浙江 温州 325000
- 折叠
摘要
Abstract
It was assumed that while instant grouting was carried out from holes of Segments in saturated clay, grouts would be contacted with surrounding clay directly and formed a hemisphere centering on the grouting hole. Pressure filtration also emerged in this process. The expansion process of spherical grouting was deducted theoretically based on Darcy's law and elastic-plastic theory. Finally, spherical cavity pressure filtration expansion model of the back-filled grouts in shield tunnel was set up. Pore water pressure around shield tunnel, effective stress and additional pressure were calculated and analysed in the process of back-filled grouts. The analysis results show that with distance being away from grouting holes, pore water pressure would dissipate. The radial effective stress of soil would decreases, while tangent effective stress of soil would increase first and then decreases afterwards. Meanwhile, additional pressure on the segment produced by grouting was increased with the increase of grouting pressure.关键词
盾构隧道/壁后注浆/球孔/压滤效应Key words
shield tunnel/back-filled grouts/spherical cavity/pressure filtration分类
建筑与水利引用本文复制引用
王朝亮,苟长飞..盾构隧道壁后注浆球孔压滤扩散模型[J].铁道科学与工程学报,2017,14(12):2670-2677,8.
