桩锚与土钉联合支护结构传力机制的对比分析  

The contrast analyzing of the force-transfering mechanism of the combined supporting structure of pile-anechor and soil-nailing

作　　者：申利梅[1] 王坤[1] 曾力[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002

出　　处：《河南科学》2005年第3期387-390,共4页Henan Science

基　　金：河南省自然科学基金资助项目(0211063200)

摘　　要：桩锚支护与土钉可以在竖向或水平向联合使用,土压力的传力机制完全不同,分别适用于不同土层条件.桩锚与土钉竖向联合支护结构中,土钉主要作用是提高桩锚后面土体强度,从而使实际作用于桩锚结构上的土压力相应减小;桩锚与土钉水平向联合支护结构中,土钉主要作用是承担桩锚结构间的土体,并将此部分土体侧压力通过水平土拱传至两侧桩锚结构上.本文通过对比分析联合支护结构间土压力的传力机制,总结了联合支护结构的承载机理和工程适用范围,为此类支护结构的合理选型和工程设计应用提供了理论基础.Pile-anchor retaining structure and soils can be jointly used in vertical or horizontal. Because the force-transfering mechanism of the earth pressure is absolutely different. They apply to different conditions soil layers respectively. In the vertical combined supporting structure of pile-anchor and soil-nailing, the main function of soil nails is to raise the strenhth of the soil behind on the pile-anchor structure decreases correspondingly; In the horizontal combined supporting structure of pile-anchor and soil-nailing, the main function of soil nails is to bear the earth between pile-anchor and structures and transfer the lateral pressure of the earth to the pile-anchor structure beside it. In this paper by contrasting and analyzing the force-transfering mechanism of load-bearing mechanism and the engineering applicability of the combined supporting structure are conluded. So it provides the theoretical basis for the engineering design and applical of this kind of retaining structure.

关 键 词：基坑工程 桩锚支护 土钉体系 作用机理 土拱效应 

分 类 号：TU463[建筑科学—结构工程]