西安地铁二号线下穿城墙及钟楼保护措施研究

›› 2010, Vol. 31 ›› Issue (1): 223-228.

西安地铁二号线下穿城墙及钟楼保护措施研究

雷永生

中铁第一勘察设计院集团有限公司，西安 710043

收稿日期:2009-07-18 出版日期:2010-01-10 发布日期:2010-02-02
作者简介:雷永生，男，1973年生，高级工程师，主要从事轨道交通工程的设计工作。

Research on protective measures of City Wall and Bell Tower due to underneath crossing Xi’an Metro Line No.2

LEI Yong-sheng

China Railway First Survey and Design Institute Group Ltd., Xi’an 710043, China

Received:2009-07-18 Online:2010-01-10 Published:2010-02-02

摘要/Abstract

摘要：

针对西安地铁二号线穿越国家级文物——城墙北门、南门及钟楼保护区在施工期以及运营期对古建筑物的影响，提出1套城墙北门、南门及钟楼的具体有效的保护措施。对比分析了穿过城墙北门、南门及钟楼的地铁几种设计施工方案，最终采纳地铁线路双侧分绕古建筑物、隔离桩基础加固以及加固古建筑物上部结构的施工方案。利用有限元软件对处理效果分析得出，城墙北门、南门及钟楼加固后地铁影响效果减小2/3。施工期监测数据表明，古建筑物沉降位移比实际预测位移要小，沉降位移均在保护设计范围之内，论证了保护措施有效性和合理性。同时，分析了地铁运营振动对城墙影响，并提出减振措施以及减振效果分析。通过方案选取、数值分析、具体实施以及实时监测，提出并论证一套具有很强实用价值的隧道穿越古建筑物保护措施。

关键词: 西安地铁, 钟楼, 城墙, 保护措施

Abstract:

Based on the influence of Xi’an Metro Line 2 underneath crossing City Wall and Bell Tower in construction period and operation period, a new series of measures for protecting City Wall and Bell Tower have been studied. Many construction plans about protecting City Wall and Bell Tower are compared and analyzed. Finally, the construction plan that is bilateral around ancient buildings, foundation reinforcement about segregation of pile, and strengthening the ancient buildings structure is adopted. Finite element software have been used to analyze the effect of the protective measures; and it is shown that the influence on City Wall and Bell Tower is lower than the before reinforcement about 2/3. The monitoring data during construction is found that the, ancient buildings settlement displacement is lower than earlier forecast data; and it keep within the limits of design value. The data demonstrate that the protective measures are valid and reasonable. At the same time, metro vibration influence on City Wall in the operation period is analyzed; and vibration damping measures are put forward. Through scheme selection, numerical analysis, specific implementation procedures and real-time monitoring, a new series of protective measures for protecting ancient buildings due to tunnel underneath crossing have been put forward and demonstrated. And the series of protective measures is very practical.

Key words: Xi’an Metro, Bell Tower, city wall, protecting measures, design and construction schemes

中图分类号:

U 215

雷永生. 西安地铁二号线下穿城墙及钟楼保护措施研究[J]. , 2010, 31(1): 223-228.

LEI Yong-sheng. Research on protective measures of City Wall and Bell Tower due to underneath crossing Xi’an Metro Line No.2[J]. , 2010, 31(1): 223-228.

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