大断面泥水盾构隧道穿越河流施工技术探讨

发布时间：2018-04-28 12:14

本文选题：河底公路隧道 + 浅覆土　；参考：《现代隧道技术》2017年03期

【摘要】：随着城市交通的快速发展,在长三角等河流众多的区域建设大断面短距离河底隧道的需求急剧增加。采用盾构法在河流下方进行隧道施工时,为了满足线路坡度要求,河底段覆土往往较浅,而且盾构在河流驳岸处推进时,覆土深度变化较大,切口水压较难控制,从而增加了施工风险和施工技术难度,成为影响工程安全的关键问题。文章以江阴澄江西路隧道工程为背景,首先分析了河底浅覆土和河流驳岸处的施工风险;其次,为了降低大直径泥水盾构隧道穿越河流段的施工风险,提出了对闸桥河驳岸边及河底进行加固的技术措施;同时,在盾构掘进过程中选取合适的施工参数并采取相应的施工控制措施,综合采用多种手段为盾构顺利穿越河流段施工提供了有力保障,可为类似工程提供借鉴。
[Abstract]:With the rapid development of urban traffic, the demand for the construction of large-section short-range river bottom tunnels in the Yangtze River Delta and other areas is increasing rapidly. In order to meet the requirements of the line slope, the overlying soil in the bottom section of the river is usually shallow when the shield method is used to carry out tunnel construction under the river, and the depth of the overlying soil changes greatly and the water pressure of the notch is difficult to control when the shield tunneling is advanced at the river barge. Therefore, it increases the construction risk and construction technical difficulty, and becomes the key problem affecting the engineering safety. Based on the Jiangyin Chengjianglu tunnel project, the paper first analyzes the construction risk of shallow overlying soil and river bank, and secondly, in order to reduce the construction risk of large diameter mud shield tunnel crossing the river section, At the same time, the appropriate construction parameters are selected and the corresponding construction control measures are taken in the course of shield tunneling. Comprehensive use of a variety of means for the shield tunneling smoothly across the river section construction provides a strong guarantee, can provide reference for similar projects.
【作者单位】：上海交通大学土木工程系;上海城建市政工程(集团)有限公司;
【基金】：国家自然科学基金项目(41372284) 上海市科学技术委员会科研项目(14231200602)
【分类号】：U455.43

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