1. 同济大学 地下建筑与工程系， 上海 200092； 2. 上海城建市政工程(集团)有限公司， 上海 200065；3. 山西省电力勘测设计院， 太原 030001
通讯作者:廖少明，男，教授，博士生导师, 电话(Tel.):021-65987571；E-mail: liaosm@126.com.作者简介:程池浩(1990-)，男，湖北省天门市人，博士生，主要从事盾构隧道及深基坑工程等研究.基金资助:国家重点基础研究发展规划(973)资助项目(2015CB057806)Experiments of Soil Conditioning for Shield Tunneling in Watery Quartz Sand-Gravel Ground
CHENG Chihao,LIAO Shaoming,CHEN Lisheng,FAN Mingxing,HUO Xiaobo1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Shanghai Urban Construction Municipal Engineering (Group) Co., Ltd., Shanghai 200065, China;3. Shanxi Electric Power Exploration Design Institute, Taiyuan 030001, China
摘要/Abstract
摘要： 针对某石英含量较高的富水砂砾地层地铁工程进行了系统的土体改良试验，并以室内试验的添加剂配比方案为基础进行了现场掘进应用及施工试验.结果表明：通过土体改良试验得到了最优的室内试验添加剂配比，即在天然含水率条件下泡沫注入比为10%，泥浆注入比为23%～25%；现场施工应密切关注土仓与螺旋输送机的压力平衡关系，并调整添加剂注入量，以达到防止盾构喷涌和控制刀盘载荷的目的，并使得渣土的坍落度和稠度分别保持在20cm和8cm左右.
关键词: 土压盾构, 富水石英砂砾层, 土体改良, 适应性
Abstract: Through a shield project in watery quartz sand-gravel ground, a series of soil conditioning tests are conducted. Then optimal parameters are obtained under natural water content, namely injection ratio of foam 10% and slurry 23%～25%. Based on formulas of laboratory tests and construction feedback, pressure balancing of soil chamber and screw conveyer should be closely focused. Cutter torque should be controlled in the normal range, while at the same time slumps and consistency of mucks should be about 20cm and 8cm, respectively. The relevant results can be used to provide references for soil conditioning by use of EPB machine in similar ground conditions.
Key words: earth pressure balance shield, flowing quartz gravel, soil conditioning, ground suitability
PDF全文下载地址:
点我下载PDF
