Proper Force Occasion of Mid-board in Shallow Buried and Partial Pressure Multi-arch Tunnel
Partial pressure will not take place in multi-tunnel on symmetrical construction. In fact, symmetrical construction is not possible, which causes complex force system of tunnel in the course of construction and adverse force on mid-board. If not appropriately treated, it will cause crack, even soil slip and construction insecurity. Security analysis on Force occasion for mid-board of shallow buried and partial pressure tunnel at entrance of fuxi tunnel is analyzed for security adopting special software FLAC3D combining excavation sequential process. Finally proper force occasion of mid-board is determined. Through contrast analysis of inner force in mid-board and ground settlement respectively caused by earlier stress and later stress of mid-board, we reach the conclusion that top of mid-board ought not to be backfilled immediately but to be backfilled gradually after the primary support acts on it for safety of mid-board.
shallow buried and partial pressure multi-arch tunnel mid-board force occasion
Zhu Zhengguo Qiao Chunsheng Zhu Taoxing
School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China School of Economics and Management. shijiazhuang Raiway Institute, Shijiazhuang 050043, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
2587-2592
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）