摘要
土压平衡盾构斜向掘削地下连续墙时姿态控制难度较大,需要合理控制盾构推进力。以南宁市轨道交通5号线新广区间盾构隧道工程为背景,针对左右线斜向穿越1号线广西大学站地下连续墙的掘进工况,通过盾构推进荷载理论模型,考虑刀盘刀具破岩荷载以及盾构-土相互作用的影响,利用MATLAB软件进行盾构作用荷载静力平衡方程的矢量计算,得到斜穿地下连续墙的盾构推进力;并结合工程实例进行对比,验证该修正理论模型的合理性。通过斜穿地下连续墙推进力计算实例的分析可以发现,盾构推进力的计算误差在20%左右,总体满足工程要求,下穿段盾构总推进力宜控制在15000~20000 kN。
The shield thrust should be reasonably controlled to regulate the earth pressure balance(EPB)shield when obliquely cutting through an underground diaphragm wall.The Nanning rail transit line 5 obliquely crosses the underground diaphragm wall of the Guangxi University station of line 1.The rock-breaking load of the EPB shield cutters and the cutterhead is analyzed as well as the interaction between the shield and soil.Furthermore,the vector calculation of the static equilibrium equation of shield action load is conducted using MATLAB software based on a theoretical model of the shield thrust load.The shield thrust is computed when obliquely cutting through the underground diaphragm wall and is compared with practical results to verify the rationality of the modified theoretical model.The comparative results demonstrate that the calculated shield thrust deviates 20%,which is acceptable for overall construction.The total shield thrust is recommended to be 15000 to 20000 kN for the undercrossing section.
作者
肖昌军
陆云贤
周志
付循伟
王树英
XIAO Changjun;LU Yunxian;ZHOU Zhi;FU Xunwei;WANG Shuying(China Railway Guangzhou Engineering Group Urban Rail Engineering Co.,Ltd.,Guangzhou 511459,Guangdong,China;School of Civil Engineering,Central South University,Changsha 410075,Hunan,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2021年第9期1485-1491,共7页
Tunnel Construction
基金
国家自然科学基金项目(52022112)。
关键词
盾构隧道
土压平衡盾构
复合地层
刀具破岩
推进力
MATLAB
shield tunnel
earth pressure balance shield
composite strata
rock breaking of cutters
thrust
MATLAB
