小净距叠线隧道的施工及运营对临近建筑物的影响

Influence of Construction and Operation of Multi-line Tunnel with Small Interval on Adjacent Buildings

本文以某叠线盾构隧道施工侧穿居民楼为背景,通过三维有限元软件MIDAS/GTS NX对盾构隧道的掘进过程及列车运营进行模拟,分析小净距情况下居民楼的沉降情况,并对居民楼的结构安全进行评估。数值模拟的结果表明在盾构隧道的掘进施工期间居民楼的沉降及位移均在允许范围内;运营期间列车振动诱发的最大垂向Z振级和最内最大噪声均在规范的容许限制内。表明在不采取措施的情况下,居民楼仍然安全可靠。该研究结果可为其他类似情况提供参考。

In this paper,based on the background of a multi-line shield tunnel construction,the tunneling process and train operation of the shield tunnel were simulated by three-dimensional finite element software MIDAS/GTS NX.The settlement of the residential building under the condition of small distance was analyzed,and the structural safety of the residential building was evaluated.The results of numerical simulation show that the settlement and displacement of residential buildings are within the allowable range during the construction of shield tunnel.The maximum vertical Z-level and maximum internal noise induced by train vibration during operation are within the allowable limits of the code.It shows that residential buildings remain safe and secure even if no measures are taken.The results of this study can provide reference for other similar situations.