基坑前排桩倾斜的双排桩性状分析  

BEHAVIORS OF DOUBLE-ROW RETAINING PILES WITH RAKING FRONT-ROW PILES IN FOUNDATION PIT

作　　者：王建[1] WANG Jian(School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《低温建筑技术》2017年第1期89-92,共4页Low Temperature Architecture Technology

摘　　要：为优化基坑工程中的双排桩支护形式,改善支护双排桩受力特性,对深基坑前排桩倾斜的双排桩进行了三维数值模拟计算与分析,研究了前排桩不同倾斜角度时,基坑前排桩倾斜的双排桩的变形与受力规律。研究结果表明:前排桩倾斜的双排桩的桩顶水平位移小于常规双排桩的桩顶水平位移,随着倾斜角增加,桩顶水平位移和桩身最大水平位移逐渐减少,支护双排桩的抗倾覆能力得到了提高;前后排桩的桩身负弯矩范围缩小,正弯矩范围逐渐增大,正、负弯矩峰值差值变大,受力不均匀,不能充分发挥桩体材料的承载能力。这为其进一步研究和设计计算提供了一定的参考依据。For the purpose of optimizing double-row piles retaining structure and improving the bear- ing behavior of the retaining double-row pile, a three-dimensional numerical simulation and analysis on double-row piles with raking front-row piles for deep foundation pit is carried out. Then, the load and deformation laws of the double-row piles with raking front-row piles are studied and analyzed further. The research results indicate that the pile-top horizontal displacement of the inclined retaining double-row piles can be significantly reduced compared with that of the vertical retaining double-row piles, the largest horizontal displacement and the pile-top horizontal displacement gradually decrease with the increase of angles, the anti-overturning ability of the retaining double-row piles is improved, the range of minus ben- ding moment also gradually decrease with the increase of angles. This research provides certain references for their design and calculation.

关 键 词：基坑 双排桩 数值模拟 前排桩倾斜 

分 类 号：TU473[建筑科学—结构工程]