摘要
在盾构的掘削过程中,千斤顶顶进推力是一个重要的施工参数,它不仅决定着施工速度,而且还影响着刀盘的切削扭矩、转动速度等其他参量。但是,目前对千斤顶顶进推力的变化规律,尤其是土体与盾壳之间摩擦阻力的研究还不够深入。以上海地区粉砂地层为参照原型,借助于模型试验方法,通过对盾构机工作参数和地层特性参数进行不同的组合试验,研究了土压平衡盾构推进过程中顶进推力变化的规律,以及土体与盾壳之间摩擦作用的机理及其影响因素。在此基础上推导了盾构千斤顶顶进推力的计算公式。
Thrust force is an important construction parameter during tunnel excavation with shield machine. It not only determines the advance rate but also influences other working parameters, such as cutter torque and rotation speed, etc. But so far, the research on thrust force, especially on frictional force between soil and shield tube, still does not go into enough depth. Therefore, a special model test scheme on tunnel excavation with earth pressure balance（EPB） shield machine is designed by the authors; while the silt sandy ground in Shanghai area is taken as prototype, then different parameters of shield machine and ground properties can be combined for testing. Based on the test results, studies are carried out to discover the variation law of thrust force, the mechanism of friction between soil and shield tube and its influence factors. Furthermore, a calculation formula of thrust force is deduced.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第8期1587-1594,共8页
Rock and Soil Mechanics
基金
国家863计划项目(No.2002AA420020)
上海市重点学科(岩土工程)资助课题
关键词
模型试验
土压平衡盾构机
顶进推力
摩擦阻力
model test
earth pressure balance shield machine
thrust force
frictional force
