【摘要】 针对软土地区复合土钉墙的应用特点及施工方法,通过对滑移土体极限平衡条件下的受力机理进行分析,通过与现有计算方法的比较分析,提出复合土钉墙设计中整体稳定安全系数的计算方法,改进现有算法.通过算例分析,说明了复合土钉支护中超前桩的设置对提高其整体稳定安全系数具有明显效果.同时分析了土钉倾角及土层摩擦角对超前桩所起作用的影响,计算结果与复合土钉墙在软土地区的工程实际应用情况是一致的,说明了计算方法的合理性.更多还原

【Abstract】 Composite soil-nailed wall(CSNW) is widely used in soft soil areas in China,and has been proved to be effective and reliable by practice.However,the current method for calculating CSNW is unsatisfactory.In this paper,a new method was proposed for calculating the whole stability of CSNW by limit equilibrium analysis of slide wedge.The example calculating results indicated that the installations of the leading piles greatly improve the factor of stability of CSNW.Under general construction conditions,the factor of stability would increase about 0.3 or so.Furthermore,the influence of soil nails’ inclined angle(α),soil friction angle(φ) on the role of leading piles were discussed,and the results coincided with practice.更多还原