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冻结法联络通道工程前期阶段风险管控——以福州市轨道交通2号线紫阳站—五里亭站区间超长联络通道及泵站冻结工程为例
网络出版日期: 2020-09-15
Risk Management in Early Stage of Connection Gallery with Freezing Method: a Case Study on Freezing Project of Superlong Connection
Gallery and Pump Station on Ziyang StationWuliting Station of Fuzhou Rail Transit Line 2
Online published: 2020-09-15
王书磊, 管攀峰, 丁国胜 . 冻结法联络通道工程前期阶段风险管控——以福州市轨道交通2号线紫阳站—五里亭站区间超长联络通道及泵站冻结工程为例[J]. 隧道建设, 2020 , 40(S1) : 258 -265 . DOI: 10.3973/j.issn.2096-4498.2020.S1.033
The connection gallery with freezing method is a selfrisk project, and there is not any risk management measures for early stage of connection gallery with freezing method. Hence, the risk source identification and risk level evaluation of the connection gallery with freezing method are analyzed. The technical measures that can reduce or avoid the risk of the connection passage with freezing method are proposed, which include: (1) The location of the connection gallery should be rationally selected by avoiding areas with serious environmental and geological risks. (2) The number of steel pipe pieces at the connection gallery should be appropriately increased to enhance the overall strength of the tunnel structure and the ability to resist risks. (3) The secondary grouting should be carried out behind segments ahead of and behind connection gallery, and the ground should be reinforced. (4) The structural dimensions of the connection galley and pump station should be optimized to facilitate freezing construction. (5) The special design of freezing method reinforcement should be rationally carried out to avoid freezing weak surface.
Key words: freezing method; connection gallery; risk management; early stage; risk evaluation
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