【摘要】 针对新型疏排桩-土钉墙组合基坑支护结构,以土拱效应分析为基础,阐述疏排桩-土钉墙组合支护技术的基本原理,通过建立平衡条件,推导拱前土体所产生的土压力,以计算疏排桩与土钉墙的荷载分担比例。基于对疏排桩-土钉墙组合支护结构不同潜在滑裂面的假定,对支护结构的拱前土体失稳破坏、土拱自身强度破坏与失稳破坏和结构整体失稳破坏三种破坏模式进行探讨,推导局部稳定性和整体稳定性验算公式。结合对实际工程的验算,说明该计算方法的合理性,具有工程应用价值。更多还原

【Abstract】 The composite structure of scattered row piles and soil nailing is a new retaining technology.According to the theory of soil arching effect,the basic principles of such composite structure are analyzed,and the earth pressure due to the slope in front of soil arch is calculated using a group of equilibrium equations.Solution of the relative load ratios between scattered row piles and soil nailing walls is derived.Furthermore,three types of slope failures are discussed,including slope failure in front of soil arch,strength and slope failure of soil arch,slope failure of structure as an entity.Shallow and base stability check formulas are obtained,depending on the hypothesis of different potential slip surfaces.Through a real project,the calculation procedure is verified.更多还原