一类双排桩支护结构参数优化与工程应用  

Parameter optimization and engineering application of a type of supporting structure with double-row piles

作　　者：范秋雁[1] 许胜才[2] 崔峰 

机构地区：[1]广西大学资源与冶金学院,广西南宁530004 [2]广西大学土木建筑工程学院,广西南宁530004 [3]广西基础勘察工程有限责任公司,广西南宁530023

出　　处：《广西大学学报（自然科学版）》2012年第4期649-660,共12页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(41162012);广西自然科学基金项目(2010GXNSFA013005)

摘　　要：由于支护空间受到限制等原因,一类双排桩支护型式设计为前后排桩之间没有土体,形成只有后排桩挡土的空间门架式结构。比较分析了一类双排桩三种计算模型之间的差异,在已给出此类双排桩支护结构内力及变形计算方法基础上,结合基本算例,进一步分析竖向弹簧刚度、连梁高度、排距及桩的入土深度对双排桩内力及变形的影响。通过对结果的分析,给出了一类双排桩支护结构设计的参考值。由于弯矩最大值发生在前排桩顶,提出了加强桩顶结点刚度措施的建议。最后结合工程实例对内力变形计算值与实测值作了比较分析,验证了理论分析的合理性,所得结论对一类双排桩支护结构设计具有一定的参考价值。For the reason that retaining space suffers from restraints, a type of supporting structure with double-row piles and without soil between the piles was designed to form a soil-retaining spatial door-frame structure. A comparative analysis on the difference among the three computational models of the supporting structure with double-row piles was carried out. On the basis of the given internal force of the supporting structure with double-row piles, the influence of the vertical stiffness, height of coupling beam, distance between the two rows and embedded depth of pile on the internal force and deformation of the double-row piles was analyzed. Based on the analysis results, a series of reference value for the design of supporting structure with this type of double-row piles was provided. Some measures to strengthen the node stiffness is put forward because the maximum value of flexural moment appears on the top of the pre-row pile. A comparison of the calculated reinforced values with those from the engineering examples shows that the theoretical analysis is reasonable and can be valuable for the design of suoDortinz structure with th;~ t ~ a..,1..1 _＇1__

关 键 词：双排桩 弹性地基梁 杆系有限元 幂级数法 影响因素 

分 类 号：TU318[建筑科学—结构工程]