盾构无障碍接收施工工艺及工程应用

The Construction Technology and Engineering Applications of Shied Machine Barrier-Free Receiving

在我国城市地铁工程快速发展的过程中,盾构法施工已成为轨道交通施工中不可缺少的施工工法。而在盾构法施工的始发、掘进与接收3个阶段中,传统的盾构接收由于需要人工凿除钢筋混凝土围护结构。致使大量有关涌水和塌方等工程事故的发生。而随着玻璃纤维筋混凝土的应用推动了盾构无障碍接收技术,免除了人工凿桩的过程,盾构可以直接切削围护结构。本文给出了盾构无障碍接收的工艺流程,并以北京地铁16号线某盾构工程为应用对象,观察该工法的地表沉降现场监测。结果表明基于盾构无障碍接收较常规的接收人工凿除钢筋混凝土围护桩体工程效率有了显著的提高,并节约了工期及管理成本。对盾构施工的提高有这深远影响。

In the process of rapid development of urban subway projects in China,shield construction has become an indispensable construction method for rail transit construction. There are three stages of shield construction: shield launching,shield tunneling,and shield receiving. The traditional shield receiving need to artificially cut out the reinforced concrete envelope structure. That caused a large number of engineering accidents such as water inflow and landslides. With the application of glass fiber reinforced polymer,shield receiving technology is promoted,which eliminates the process of artificial chiseling. The shield can directly cut the envelope structure. In this paper,a certain shield tunneling project of Beijing Metro Line 16 is given,and the process flow of the shield is accepted,and the ground settlement is monitored. The results show that the shied machine barrier-free receiving has significantly improved the engineering efficiency compared with conventional receiving artificially chiseled reinforced concrete retaining piles,and saved time and management costs. This has a profound effect on the improvement of shield construction.