摘要
为了探究土压平衡盾构在富水砂黏复合地层中掘进参数与地层的相关性,依托青岛地铁4号线沙子口站至崂山六中站区间,对盾构原始掘进参数进行二次转化,并利用陆域段与河域段的比推力、比扭矩与复合比进行分析。研究结果表明,利用沿隧道纵向每一环开挖面积中黏土所占的比例来计算复合比是合理的;利用复合比的变化趋势来调整比推力、比扭矩是合理的;陆域段的地层复合比范围在33.2%~78.6%时,比推力控制在129.6~411.6 kN/mm之间,比扭矩控制在12.5~51.9 kN·m/mm之间;河域段地层复合比范围在25.4%~97.3%时,比推力控制在109.6~380.1 kN/mm之间,比扭矩控制在14.0~40.8 kN·m/mm之间。
In order to explore the correlation between the strata and tunneling parameters of the earth pressure balance shield in the water-rich sand-clay composite stratum,the original tunneling parameters of the shield are transformed consecutively.Based on the section from Shazikou Station to Laoshan No.6 Middle Station of Qingdao metro line 4,the specific thrust,specific torque,the compound ratio of the land section,and the river section are used for analysis.The measured results show that:it is reasonable to use the proportion of clay in the excavated area of each ring along the longitudinal direction of the tunnel to calculate the composite ratio;it is reasonable to use the change trend of the compound ratio to adjust the specific thrust and specific torque;when the stratum composite ratio of the land section is in the range of 33.2%-78.6%,the specific thrust is controlled between 129.6-411.6 kN/mm,and the specific torque is controlled between 12.5-51.9 k N·m/mm;when the stratum composite ratio of the river section is in the range of 25.4%-97.3%,the specific thrust is controlled between 109.6-380.1 kN/mm,and the specific torque is controlled between 14.0-40.8 kN·m/mm.
作者
曹云飞
王旭春
韩旭
吴文瑞
洪勇
CAO Yun-fei;WANG Xu-chun;HAN Xu;WU Wen-rui;HONG Yong(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,Shandong,China)
出处
《地基处理》
2021年第5期433-439,共7页
Journal of Ground Improvement
基金
国家重点研发计划项目(2018YFC1505302)。
关键词
土压盾构
复合地层
掘进参数
复合比
相关性
earth pressure shield
composite strata
tunneling parameters
composite ratio
correlation
