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以广州某复杂边界条件深大基坑工程为背景,基于该基坑属于旧基坑加深的工程特点,通过选择复合土钉墙与桩锚(预应力)支护相结合的组合支护结构方案,以及合理的桩间距及桩间止水帷幕等措施,既保证了基坑及周边环境的安全和基坑工程的顺利实施,也保证了工程的经济合理性,分析基坑实施期间的各项监测数据和受力变形特点表明该组合支护形式取得了良好的实施效果。
Based on the engineering of a deep foundation pit project with a complex boundary condition in Guangzhou, based on the engineering characteristics that the foundation pit belongs to the deepening of the old foundation pit, a composite support structure scheme combining composite soil nailing wall and pile anchor (prestressing) , As well as reasonable measures such as spacing between piles and curtains between piles, which not only ensure the safety of foundation pit and surrounding environment and the smooth implementation of foundation pit engineering, but also ensure the economic rationality of the project, and analyze various items during the implementation of foundation pit The monitoring data and the characteristics of mechanical deformation show that the combined support form has achieved good results.