市内复杂环境中爆破施工对周边高层建筑影响分析

发布时间：2018-04-10 02:33

本文选题：复杂环境　切入点：爆破施工　出处：《四川建筑科学研究》2016年06期

【摘要】：在周边高楼林立、车流量大、人员密集的环境下进行地基与地下大空间爆破开挖施工,不可避免地会对邻近房屋产生振动影响。针对爆破施工对邻近建筑的影响判断,本文首先对爆破施工周边某高层建筑在爆破施工前、后进行动力特性测试,并对所采集的振动数据进行分析,研究该建筑爆破前、后自振频率是否有异常;同时研究爆破时建筑物所在地基础峰值振动速度是否在安全允许范围以内;对爆破施工进行数据分析,分析该建筑是否在爆破安全距离以外,并对测试建筑在爆破施工前、后裂缝情况进行普查对比,分析爆破施工是否对房屋结构构件产生影响。研究结果表明:该建筑结构自振频率在爆破施工前、后无明显变化;爆破时建筑物所在地基础峰值振动速度在安全允许范围内;该建筑在爆破施工振动安全距离以外;爆破施工对该建筑结构构件裂缝未产生明显影响。
[Abstract]:Blasting excavation of ground and underground large space in the surrounding high-rise buildings with large traffic flow and dense personnel will inevitably affect the vibration of adjacent buildings.In view of the influence of blasting construction on adjacent buildings, this paper first tests the dynamic characteristics of a high-rise building around blasting construction before and after blasting construction, and analyzes the vibration data collected to study the pre-blasting of the building.At the same time, the paper studies whether the peak vibration velocity of the building is within the safe allowable range, analyzes the data of the blasting construction, and analyzes whether the building is outside the safe distance of blasting.A general survey and comparison of the cracks in the test building before blasting construction are carried out to analyze whether the blasting construction has an effect on the structural members of the building.The research results show that the natural vibration frequency of the building structure does not change obviously after blasting construction, the peak vibration velocity of the building is within the safe allowable range, the building is outside the safe distance of blasting construction vibration.The blasting construction has no obvious influence on the cracks of the structural members.
【作者单位】：四川省建筑科学研究院;
【分类号】：TU751.9

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