盾构施工绕穿钟楼方案的优化研究

Study of the optimization scheme of shield construction passing around the Bell Tower

西安地铁二号线的修建会不可避免地穿越国家级重点保护文物——西安钟楼。本文以该工程为背景,采取有限元数值分析方法,建立三维有限元模型,模拟了七种不同盾构绕穿钟楼的施工方案。在有加固桩和无加固桩两种工况下,得到了钟楼台基及其周围地表土的沉降规律和钟楼台基应力变化规律。对比分析了钟楼加固前后不同施工方案对钟楼的影响程度,优化了设计施工方案。

Xi＇an metro line two construction inevitably passes through the national key cultural relic—the Bell Tower.Based on the engineering background,the finite element numerical analysis method is adopted to establish the three-dimensional finite element model.Under two conditions of reinforced piles and non reinforced piles,the seven different shield construction schemes underneath passing through the Bell Tower are simulated respectively,according to which the Bell Tower platform and the surrounding surface soil settlement rules and the Bell Tower platform stress variation rules are obtained.Different effects of the seven construction schemes on the Bell Tower are compared and analyzed,with the design and construction scheme optimized.