摘要
目前隧道施工过程中泥水盾构施工参数多根据现场施工经验调整,缺乏系统的模型泥水盾构施工参数与泥浆压力大小之间的理论计算模型。通过对泥水平衡盾构的类型和工作原理进行细致的研究分析,提出盾构掘进过程中各施工参数需满足的关系式,并以此建立了泥水盾构泥水仓泥浆压力控制模型,得到了泥水盾构可控施工参数直接量化控制泥水仓泥浆压力的计算方法,并提出泥水仓内的泥浆需要满足盾构施工泥浆渣土悬浮和输送能力的要求,推导了泥水盾构掘进速度与进浆流量的关系式。研究结果表明,泥水仓泥浆压力随着进浆流量及盾构掘进速度的增大而增大,随着排浆流量的增大而减小。结合长沙地铁6号线泥水盾构施工工程,通过实例仿真计算,验证了此计算模型的有效性。研究成果为泥水平衡盾构泥水仓泥浆压力控制的研究提供了理论基础。
The construction parameters of slurry shield in tunnel construction are mostly adjusted according to the field construction experience,and the systematic theoretical calculation model between the construction parameters and mud pressure of slurry shield is lacking.The relationship that each construction parameter needs to be met during the process of shield tunneling has been put forward through a detailed research and analysis on the type and working principle of slurry balance shield.The slurry pressure control model of the slurry chamber of the slurry shield and the calculation method of the directly quantified controllable construction parameters of the slurry shield to control the mud pressure are obtained.The requirement that the mud residue suspension and transportation capacity in shield construction of the slurry pressure in the slurry chamber needs to be met has been presented and the relationship between the tunneling speed of the slurry shield and the slurry flow is deduced.The result shows that the slurry pressure of the slurry chamber increases with the increases of the slurry flow and the shield tunneling speed,and decreases with the increase of slurry discharge flow.The effectiveness of the presented calculation model is verified through the slurry shield construction project in Changsha subway line 6 and numerical simulation.The research result provides a theoretical basis for the study on slurry pressure control in slurry chamber of slurry balance shield.
作者
周中
陈云
刘撞撞
ZHOU Zhong;CHEN Yun;LIU Zhuang-zhuang(School of Civil Engineering,Central South University,Changsha,Hunan 410075,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2022年第S01期286-292,300,共8页
Rock and Soil Mechanics
基金
国家自然科学基金(No.50908234).
作者简介
第一作者:周中,男,1978年生,博士,副教授,硕士生导师,主要从事隧道与地下工程相关的科研工作。E-mail:369144091@qq.com;通讯作者:刘撞撞,男,1994年生,硕士研究生,主要从事隧道与地下工程方面的研究工作。E-mail:1721037578@qq.com
