粘钢加固处理基坑支护桩侵限问题研究  

Study on the Invasion Limit Problem of Excavation Retaining Pile Reinforced with Adhesive Steel

作　　者：房江锋 万延 陈世龙 阳唤 杜琦 赖峰 FANG Jiangfeng;WAN Yan;CHEN Shilong;YANG Huan;DU Qi;LAI Feng(Shenzhen Hongyeji Geotechnical Co.,LTD.,Shenzhen Guangdong 518029,China)

机构地区：[1]深圳宏业基岩土科技股份有限公司,广东深圳518029

出　　处：《长春工程学院学报（自然科学版）》2024年第4期38-43,共6页Journal of Changchun Institute of Technology：Natural Sciences Edition

摘　　要：深基坑支护桩施工过程中受地质条件、周边环境、施工工艺及施工设备等因素影响,经常发生支护桩侵界事故。案例综合考虑基坑周边施工环境,建筑使用面积、功能、工期及费用等综合因素,选用粘钢加固方法对侵限桩进行处理和加固。通过计算处理前后支护桩的承载力,结果显示:粘钢加固可以补偿切除侵限后的支护桩的承载力;结合桩身深部水平位移、桩身裂缝监测结果的反分析,论证了粘钢加固方案的可行性。施工期间,利用基坑的空间效应,采用分序施工的方法对侵限支护桩进行切割和加固,处理过程中基坑的各项监测指标均在设计允许范围内。采取粘钢加固方法有效解决了基坑支护桩侵限的难题。可为同类项目提供参考。During the construction of deep excavation retaining piles,accidents of pile intrusion into the boundary often occur due to factors such as geological conditions,surrounding environment,construction technology,and construction equipment.Taking into account the construction environment around the excavation,as well as factors such as building area,function,construction period,and cost,the adhesive steel reinforcement is selected to treat and reinforce the invasion limiting piles.By calculating the bearing capacity of the retaining piles before and after processing,the results show that adhesive steel reinforcement can compensate for the bearing capacity of the retaining piles after cutting off the invasion limit.Based on the back analysis of the deep horizontal displacement of the pile body and monitoring results of pile cracks,the feasibility of the bonded steel reinforcement scheme is demonstrated.During the construction,utilizing the spatial effect of the excavation,a sequential construction is adopted to cut and reinforce the invasion limit retaining piles.All monitoring indicators of the excavation are within the allowable range of the design during the treatment.The use of adhesive steel reinforcement effectively solves the problem of pile invasion limit in excavation retaining.It can provide reference for similar projects.

关 键 词：深基坑 支护桩 侵限 粘钢加固 

分 类 号：TU712[建筑科学—建筑技术科学]