超大直径泥水平衡盾构近距离穿越防汛墙及码头桩基

超大直径泥水平衡盾构在穿越建构筑物时,因其断面大,泥水渗透性强,施工过程中,土体的损失率相对于地铁盾构偏大,当近距离穿越防汛墙或码头桩基时,施工风险巨大,稍有不慎,会影响防汛墙和码头的使用,造成较大的经济损失和恶劣的社会影响。该文通过对上海长江西路越江隧道近距离穿越浦西防汛墙和码头桩基施工的研究和总结,提出了近距离穿越过程中,应注意到的问题及具体的解决措施,可为类似施工提供借鉴。

Super-large-diameter Slurry Balance Shield to Cross Flood Control wall and Wharf Pile Foundation in Short Distance

The soil loss rate is large relatively to the metro shield in the construction because of its large section and strong slurry permeability when the super-large-diameter slurry shield crosses the buildings and structures.The construction risk is huge when it crosses the flood control wall or wharf pile foundation in short distance,which will affect the use of flood control wall and wharf and cause the greater economical loss and the bad social impact in an unguarded moment.The article studies and sums up the construction of Shanghai Changjiang Road(W) Crossing-river Tunnel to cross the flood control wall and wharf pile foundation of Puxi in short distance,and puts forward the issues for attention in the short-distance crossing process and the detail solving measures,which can be referred for the similar construction.