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运用数值分析手段,模拟了某隧道建设过程地下水渗流对紧邻高架桥扩大基础的影响,重点分析了隧道施工过程和运营期扩大基础的水位变化规律。研究结果表明:隧道施工过程中最大水位降为1.35m,发生在7号墩扩大基础部位;运营期隧道止水带失效发生漏水时,沿隧道纵向在沉降缝附近形成明显的降水槽,但未造成隧道两侧扩大基础发生明显的水位下降。因此,认为该隧道建设地下水渗流不会危及紧邻高架桥扩大基础的安全。
Numerical simulation is used to simulate the effect of groundwater seepage on the expansion foundation of a viaduct during the construction of a tunnel. The change rules of water level during tunnel construction and during operation are analyzed emphatically. The results show that the maximum water level dropped to 1.35m during the construction of the tunnel and occurred at the base of No.7 pier. During the operation period, when the failure of the water-stop of the tunnel occurred water leakage, obvious precipitation trough formed along the longitudinal direction of the tunnel near the settlement, As a result, there was a clear drop in water level on both sides of the tunnel. Therefore, it is considered that the tunnel construction of groundwater seepage will not endanger the safety of the foundation immediately adjacent to the viaduct.