超深基坑内支撑爆破拆除对围护结构及周边建筑物的影响分析

Influence on the surrounding buildings by support demolition blasting in the deep foundation pit

以马场道东侧平泰大厦项目超深基坑内支撑爆破拆除工程为背景,介绍了超深基坑在特别复杂环境下内支撑爆破拆除前所采取的相关技术保护措施,对爆破后基坑围护结构及周边建(构)筑物实时变形监测数据进行了深入分析研究。实践结果表明,该项目围护结构及天然地基居民楼变形均在合理范围内,可为类似基坑工程内支撑爆破拆除的顺利开展提供理论依据。

Based on the background of the inner support demolition blasting project in the ultra-deep foundation pit of PingTai Mansion on the east side of Ma Chang Road,this paper introduces the relevant technical protection measures taken before the blasting,makes an in-depth analysis of the real-time monitoring data for deformation of foundation pit enclosure and surrounding structures after blasting.The results show that deformation of the surrounding palisade structure and residence are within reasonable range,which provides a theoretical basis for similar excavation engineering by using demolition blasting.