强震水下盾构管廊砂土液化区穿越方案研究

Study on Scheme for Underwater Shield Tunnel Through Sand Liquefaction Zone in Strong Earthquake Load

以"河北第一盾"曹妃甸工业区综合管廊工程为依托,选取典型砂土液化断面,利用FLAC2D有限差分软件对强震水下盾构管廊砂土液化区穿越方案进行对比分析。研究结果表明:地层加固范围取3 m,地基强度参数提高1倍即能达到安全与经济的平衡。其结论可为类似工程提供很好的参考和借鉴。

Based on the comprehensive pipe Project of Caofeidian Industrial Zone Gallery known as ‘the 1st shield of He Bei＇,select typical section of sand liquefaction,cossing scheme for underwater shield tunnel through sand liquefaction zone in strong earthquake load is studied by flac2 d. The result show that the balance of safety and economic can be reached by range of 3m stratum reinforcement and increasing foundation strength parameters to 2 times. and provided some reference to perfect the related design specifications.