盾构隧道泥浆劈裂的室内试验研究  

Laboratory Tests of Slurry Fracturing during Shield Tunneling

作　　者：张祥龙[1,2] 李斌 陈振业 

机构地区：[1]山东大学岩土与结构工程研究中心,济南250014 [2]山东广播电视大学,济南250014 [3]联兴建设湖北有限公司,武汉430073 [4]无锡市民用建筑设计院有限公司,无锡214000

出　　处：《城市轨道交通研究》2016年第11期64-67,72,共5页Urban Mass Transit

摘　　要：防止泥浆劈裂是保证泥水盾构开挖面稳定的关键问题之一。利用自制的模具来模拟现场盾构机在地层中掘进的情形,结合应变控制式三轴仪开展了室内泥浆劈裂试验。研究表明：当泥浆黏度在18~30 s范围内,泥浆劈裂压力值随着黏度值的增大而明显增大;但当泥浆黏度超过30 s后,泥浆劈裂压力值随着黏度值的增大而变化较小;当泥浆黏度在25~30 s之间,森麟经验公式中的系数α取1.0左右。此外,增加围压也可以有效提高泥浆劈裂压力值。To ensure the stability of excavation face, how to avoid the slurry fracturing during shield tunneling is always one of the most difficult problems. In this paper, a homemade testing instrument is used to simulate the process of slurry fracturing during shield tunneling with strain - controlled triaxial apparatus in laboratory. Testing results show that fracturing pressure value will notably increase when the increasing slurry viscosity is ranging from 18 s to 30 s, whereas the pressure effect is insignificant when the slurry viscosity is larger than 30 s. It is also found that parameter α in Mori＇s formula will be about 1.0 when slurry viscosity varies from 25 s to 30 s. In addition, the fracturing pressure value will also be increased remarkably by increasing the confining pressure.

关 键 词：盾构 泥浆劈裂 泥浆黏度 围压 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]