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地铁隧道施工经常有穿越既有桥梁基础的现象,穿越施工对桥梁造成的潜在威胁受业内普遍重视。合肥地铁三号线习友路站一芙蓉路站区间隧道为双线隧道,下穿翡翠路辉煌桥。隧道施工会对桥梁浅埋基础造成影响,导致桥梁结构的附加应力、变形及沉降.本文以区间隧道穿越辉煌桥掘进施工为例,基于Midas GTS NX建立三维模型,对由于双线隧道穿越既有桥梁施工引起的桥梁沉降进行了全过程计算和分析。结果表明,桥梁的沉降指标低于容许限值要求.
Subway tunnel construction often has the phenomenon of crossing the existing bridge foundation. The potential threat to bridges caused by construction is generally valued by the industry. Hefei Metro Line Xi You Road Station Furong Road Station section of the tunnel as a double tunnel, under the Jade Road Brilliant Bridge. The tunnel construction will affect the shallow foundation of the bridge and lead to the additional stress, deformation and settlement of the bridge structure.In this paper, tunneling through the brilliant bridge as an example, the Midas GTS NX is used to build the 3D model, Bridge construction caused by the settlement of the whole process of calculation and analysis. The results show that the settlement index of the bridge is below the allowable limit.