劲性搅拌桩竖向荷载传递规律理论计算  

Transfer Mechanism and Theoretical Calculation of Reinforced Mixing Pile

作　　者：高星江 贾沼霖 

机构地区：[1]华电重工股份有限公司天津分公司,天津300010 [2]天津市软土特性与工程环境重点实验室,天津300384

出　　处：《海河水利》2017年第5期46-49,共4页Haihe Water Resources

摘　　要：通过对一种劲性搅拌桩在竖向荷载作用下的荷载传递规律进行理论分析,提出该桩型竖向承载力标准值的计算公式。计算结果表明,芯桩的置入提高了水泥搅拌桩的桩身刚度和截面承载力,使极限状态下的水泥土的侧摩阻力和桩身混凝土的材料强度得以充分发挥,劲性搅拌桩兼有水泥土搅拌桩和预制桩的优点,具有承载力高、沉降小、造价低和侧摩阻力大的优势,是一种极具潜力的桩型。This paper analysed a kind of load transfer law of a reinforced mixing pile under the vertical load and put forward the calculation formula of vertical bearing capacity of the pile,experimental results show that the core pile driven in improves the rigidity of the cement mixing pile and bearing capacity of the section and gives the skin resistance of cement in ultimate states and the strength of the concrete to their full play. As the reinforced mixing pile has the advantages of both cement-soil mixing pile and prefabricated concrete pile including high bearing capacity small settlement low costs and high skin resistance it has great potential as the mixing pile in soft ground.

关 键 词：劲性搅拌桩 接触面摩阻力 变形协调 荷载分担比 荷载传递 

分 类 号：TU473.1[建筑科学—结构工程]