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结合深圳地铁7号线下穿大沙河泄水渠、侧穿水库桥,采用数值模拟计算方法,研究盾构施工对水工建筑物的影响规律。通过分析盾构施工对泄水渠沉降、隧道正上方纵向沉降及水库桥位移、应力的影响程度,表明泄水槽横向断面沉降呈现两个V断面形状,一个位于水库桥附近,另一个位于隧道上方泄水槽附近;水库桥最大/小沉降值均有所增加,最小沉降值增幅较大,水库桥在盾构掘进后存在一定的倾斜。
Combined with the Dashahe drainage canal under the Shenzhen Subway Line 7 and the side of the reservoir bridge, numerical simulation is used to study the influence of shield construction on hydraulic structures. Through the analysis of the effect of shield construction on the settlement of drains, the longitudinal settlement directly above the tunnel and the displacement and stress of the reservoir bridge, it shows that the cross section of the draining groove has two V sections, one near the reservoir bridge and the other above the tunnel Near the sink; the maximum / minimum settlement values of reservoir bridges have increased, and the minimum settlement values have increased greatly, and the reservoir bridges have some inclination after the shield tunneling.