复杂环境下盾构机水平冰冻始发技术

盾构始发到达常给隧道施工带来不小风险,盾构始发到达施工技术已成为隧道工作者日益关注的热点。水平冻结法作为盾构始发土体加固的一种可靠方法,得到广泛的应用。某工程盾构始发周边环境较为复杂,有重要管线、高架桥及社会道路,常规搅拌桩、旋喷桩施工场地条件没有,无法实施,只能选用水平冰冻加固方法。该文结合该工程盾构始发实际情况,详细介绍了水平冻结的施工方法,并取得了较好的效果。其所取得的工程经验和教训可为今后类似工程采用该工艺施工提供参考。

Horizontal Freezing Construction Technique of Shield Machine under Complex Environment

The shield arrival often brings the risk to the tunnel construction.The shield arrival construction technique has become the focus increasingly paid attention by the tunnel operators.The horizontal freezing method,as a reliable method of shield original soil reinforcement,has been widely used.The shield original surrounding environment of a project is more complex,where there are the important pipelines,viaducts and social roads.It is hard to implement because of no conventional mixing pile and rotary jet grouting pile construction fields.It has to select the horizontal freezing reinforcement method.As the practical case of the shield in this project,the article introduces the construction method of horizontal freezing and its better achieved effect in detail.The achieved engineering experience and lessons can be referred for the similar projects by this construction technology.