福州中粗砂地层泥水盾构泥浆成膜特性试验研究  

Laboratory test and characteristic of filter film formation of slurry shield in medium-coarse sand stratum in Fuzhou

作　　者：叶伟涛 王靖禹 付龙龙[1] 周顺华[1] 宁纪维 YE Weitao1, WANG Jingyu1, FU Longlong1, ZHOU Shunhua1, NING Jiwei2(1. Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China; 2. CCCC Tunnel Engineering Co., Ltd., Beijing 100102, Chin)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]中交隧道工程局有限公司,北京100102

出　　处：《岩石力学与工程学报》2018年第5期1260-1269,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51708423)~~

摘　　要：泥水平衡盾构在掘进过程中维持开挖面土体稳定的关键在于泥浆性能与地层相匹配。以福州地铁泥水平衡盾构全断面穿越中粗砂层掘进为工程背景,首先分析制浆材料对泥浆性质的影响,并开展泥浆成膜室内试验,采用析因设计综合分析不同泥浆相对密度和黏度下试验的单位滤水量、成膜时间和泥膜形态,以及泥仓压力和含砂率对泥浆成膜的影响。结果表明:在本试验泥浆成膜试验条件下,最终滤水量随着相对密度的增大先减小后增加,随着黏度的增大而减小,同时,黏度对试验最终滤水量的影响小于相对密度的影响;随着泥浆中含砂率的增加,试验最终滤水量先减小后增大;当含砂率为10%~16%时,泥浆成膜最终单位滤水量小,泥浆成膜效果良好;就地取材,将淤泥质土作为泥浆组分之一时,适应福州中粗砂层的泥浆相对密度为1.12~1.18,黏度为26~30 s。The matching of slurry to stratum is the key factor to maintain the stability of the excavation face in tunnel construction using the slurry balance shield. The tunnel project in Fuzhou,where slurry balance shield was driven in medium-coarse sand,was investigated with the laboratory tests to explore the influence of constituents on slurry property. The influence of slurry properties including slurry relative density,viscosity and sand factor on the forming of filter film under different slurry pressures was analyzed. The final unit water filtration was found to decrease firstly and then increase with the slurry relative density increasing. The final unit water filtration decreases as the slurry viscosity increases. The viscosity has less influence on the final unit water filtration than the slurry relative density does. The final unit water filtration decreases firstly and increases later with increasing the sand content in slurry. When the sand content is between 10% and 16% ,the final unit water filtration in the tests is the smallest with a well-formed filter film. When the local mucky soil is taken as a component of slurry,the suitable slurry relative density which matches the medium-coarse sand stratum is in the range 1.12 to 1.18 and the viscosity is in the range 26 to 30 seconds.

关 键 词：隧道工程 泥水平衡盾构 泥浆成膜 泥浆配比 单位滤水量 室内试验 

分 类 号：U45[建筑科学—桥梁与隧道工程]