铁道科学与工程学报2017，Vol.14Issue(10)：2185-2193,9.
富水砂层越江隧道小直径土压盾构施工技术
Construction technologies of river-crossing tunnel using small-diameter EPB shield in watered sandy stratum
摘要
Abstract
By taking Nanjing Jiangdao substation cable construction as an example, this paper introduced the technology of EPB shield thus tunneling and piercing through Jiajiang in sandy strata whose permeability coefficient is 10-3m/s, the type of shield originating and arriving strengthening manners in disturbed soil and the technology of emergency treatment with sand gushing and water leaking. The influence of shield tunneling on the flood control embankment was analyzed. The results show that the boring parameters such as shield thrust, cutter head torque and speed, pressure of the soil chamber in this putting forward trial driving are reasonable and feasible, and this realizes the fast feed construction. The utilization of combined sleeper can improve the work efficiency greatly and it can also adapt to the narrowness shield space. By using three-shaft stirring pile+vertical freezing to improve strata, the technology of shield water receiving can make sure the safety of shield arriving.关键词
土压盾构/富水砂层/盾构掘进/端头加固/水中接收/地表沉降Key words
EPB shield/watered sandy stratum/shield tunneling/strata improvement/water receiving/ground surface settlement分类
建筑与水利引用本文复制引用
潘荣凯,蒋一德,杨平..富水砂层越江隧道小直径土压盾构施工技术[J].铁道科学与工程学报,2017,14(10):2185-2193,9.基金项目
住房和城乡建设部科学技术项目(2014-k3-029) （2014-k3-029）
上海市机械施工集团有限公司科研项目(13JCSF-09) （13JCSF-09）
