【摘要】 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。更多还原

【Abstract】 Based on an old excavation deepening project with complex boundary conditions in Guangzhou,a combined scheme of composite soil-nailing wall and pile-anchor retaining structure scheme is selected.The reasonable pile spacing and pile waterproof curtain and other measures are adopted to ensure the safety of excavation and the surrounding environment as well as its smooth constrcution.The monitoring data and the deformation characteristics of the retaining structure show that the combined support achieves satisfactory effectiveness.更多还原