In view of the lack of design theory and construction experience of the freezing method of the cross passage in the large buried depth and water rich stratum,the freezing design scheme and main safety technical measures of the project were systematically introduced against the background of No.10 pedestrian cross passage in Beijing East Sixth Ring Road Reconstruction Project.The design thickness of the freezing wall was 3.5 m,and the average temperature was≤-12 ℃.The bearing ca-pacity of the frozen wall was checked by the method of structural mechanics,and the temperature field was checked according to the designed hole position.The main safety technical measures were de-signed to protect the door,tunnel support and filling and thaw collapse grouting.The construction of the project had been completed safely and smoothly,and it had initiated the freezing project of the cross channel of the water rich stratum with the largest buried depth in China,which provided valua-ble experience for subsequent similar projects.
关键词
大埋深/富水地层/横通道/冻结法/冻结设计
Key words
large buried depth/water rich stratum/crosspassage/freezing method/freezing design
维普
万方数据