基坑斜直交替支护桩的影响因素研究  

Research on influencing factors of inclined and straight alternating support piles in foundation pit

作　　者：汪东林 汝露军 Wang Donglin;Ru Lujun(School of Civil Engineering,Anhui Jian Zhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,合肥230601

出　　处：《黑龙江科技大学学报》2024年第6期876-883,共8页Journal of Heilongjiang University of Science And Technology

基　　金：安徽省住房城乡建设科学技术计划项目(2023-YF024,2022-YF165)。

摘　　要：为了研究基坑斜直交替支护桩的影响因素,运用岩土工程有限元软件MIDAS GTS NX建立基坑模型,根据斜直交替桩支护的桩-土共同作用抗倾覆工作机理,探究了斜直桩的桩长、桩头位置和支护结构的空间刚架效应对支护效果的影响。结果表明,在控制变形方面,斜桩发挥着更加重要的作用,桩头间距为2 m时坑边桩体最大水平位移比桩头间距为0 m时减小了13.54%,提高支护结构的整体空间刚架效应能够显著提高斜直桩支护的支护效果,进一步完善支护设计。该研究可为斜直交替桩支护的作用机理研究和应用提供一定参考。This paper seeks on investigating the influencing factors of inclined and straight alternating supporting piles in foundation pit.The study involves establishing a foundation pit model by using geotechnical engineering finite element software MIDAS GTS NX,and exploring the influence of patial rigid frame of the pile length,head position and supporting structure on the support effect of the inclined straight pile according to the working mechanism of pile-soil joint action against overturning of inclined straight alternating pile support.The results show that the inclined pile plays a more important role in controlling deformation.When the pile head spacing is 2 m,the maximum horizontal displacement of the pile body at the edge of the pit reduces by 13.54%compared with the pile head spacing by 0 m.The improvement of overall spatial rigid frame effect of the support structure can significantly improve the support effect of the inclined straight pile suppor and perfect the support design further.This research can provide some reference for the research of the mechanism and application of the alternating inclined and straight pile support.

关 键 词：基坑 斜直桩支护 桩长 桩头位置 空间刚架效应 

分 类 号：TU470[建筑科学—结构工程]