城市隧道施工期间既有建筑物安全性模糊综合评判

Comprehensive Fuzzy Evaluation of the Safety of Existing Buildings During Tunneling Construction in Urban Areas

城市暗埋隧道一般埋深浅、断面大,围岩条件差,隧道上方有密集建筑群,施工风险很大。文章针对既有建筑物在隧道施工期间的安全风险问题,综合考虑建筑物自身性能、隧道条件和工程现场实时监测数据三方面影响因素,建立了二级模糊综合评价模型,对既有建筑物的安全性进行了全面、动态评判,根据评判结果确定了合理的建筑物安全防护措施;结合厦门市成功大道梧村山隧道下穿既有建筑物工程实例,对其进行安全评判,并根据评判结果分别采取了不同的应对措施,取得了很好的效果,验证了该方法的实用性和有效性。

Generally, bored tunnels in urban areas are characterized by a shallow depth, a large section, poor surrounding rock, dense buildings above the tunnel, and high-risk construction. Aiming at the safety risk to existing buildings during tunneling construction, the three influential factors of building performance, tunnel condition, and in-situ monitoring data are considered and a two-level fuzzy comprehensive model is established to dynamically evaluate the safety of existing buildings and determine reasonable safeguarding measures for buildings according to evaluation consequences. Using the case of the Wushancun tunnel passing under existing buildings on Chenggong avenue in Xiamen, construction safety was evaluated and relevant measures were adopted according to evaluation consequences, and sound results were achieved.