水泥土桩复合桩墙前墙抗裂计算与工程实例分析

Anti-crack calculation and engineering case of compound soil-cement pile wall

复合桩墙支护结构是一种新型支护结构,具有止水挡土双重作用,介于刚性重力式挡墙和柔性悬臂桩墙之间的一种属半刚、半柔性支护结构,前墙水泥土桩身应力受墙身弯矩、墙顶混凝土刚度(约束)、墙后侧土体沉降量、侧阻力和墙前挖土速度、墙前后水位降差、降速等因素影响。通过对上述因素的分析,结合工程实例,讨论了前墙水泥土开裂的理论计算和控制问题。

The compound pile wall is a new supporting structure type.It has strong ability to reduce the pressure of water and soil.Its stiffness is between that of gravity retaining walls and cantilever-retaining pile wall.The stress of the front pile is affected by the moment of the wall,the concrete stiffness of the top of the wall,the soil settlement and resistance behind the wall,the speed of soil excavation of the front wall,the difference of water levels and the speed drops in front of and behind the wall.Based on the analysis of the above factors and project examples,the theoretical calculation and control problem of the crack about the front cement-soil wall were discussed.