雪花形钢板桩桩身变形影响因素研究  

Study on Influencing Factors of Deformation of Snowflake Shaped Steel Sheet Pile

作　　者：徐中权 高磊[1] 张峻玮 王权 张振雷 XU Zhongquan;GAO Lei;ZHANG Junwei;WANG Quan;ZHANG Zhenlei(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210024,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210024

出　　处：《防灾减灾工程学报》2023年第3期550-558,共9页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金(52027812);中央高校基本科研业务费专项资金(B210202047)资助。

摘　　要：雪花形钢板桩是一种新型异型桩,为研究其在荷载作用下桩身变形特征,开展了雪花形钢板桩桩身变形数值模拟与室内模型试验研究,采用有限差分软件FLAC 3D构建雪花形钢板桩数值分析模型,并与室内模型试验结果进行对比,验证了数值模型建立的合理性;同时研究了雪花形钢板桩翼缘数量、腹板(翼缘)厚度、腹板(翼缘)长度、桩长和钢板弹性模量对桩身变形的影响。结果表明:在竖向荷载作用下,雪花形钢板桩桩身应变随着深度增加而减小;增加雪花形钢板桩翼缘数量可以减小最大受力及改善桩体受力的均匀性;在相同条件下,雪花形钢板桩桩身应变随着腹板(翼缘)厚度增大而减小,随着腹板(翼缘)长度增大而减小,随着钢板弹性模量的增大而减小;随着桩长增长,距桩顶相同位置处的桩身应变不断增大,但最大应变大小一致发生在桩顶处。Snowflake-shaped steel sheet piles are a new type of special-shaped pile.To study their deformation characteristics under load,numerical simulations and laboratory model test were carried out.The finite difference software FLAC3D was used to construct the numerical analysis model of the snowflake-shaped steel sheet pile,and the validity of the numerical analysis is verified by the results of the laboratory model test.At the same time,the influences of flange number,web(flange)thickness,web(flange)length,pile length,and steel plate elastic modulus on pile deformation are studied.The results show that under vertical loads,the strain of the snowflake-shaped steel sheet pile decreases with increasing depth.Increasing the number of flanges of the snowflake-shaped steel sheet pile can reduce the maximum stress and improve the uniformity of the pile force.Under the same conditions,the strain of the snowflake-shaped steel sheet pile decreases with increasing thickness and length of web(flange),as well as the increasing elastic modulus of the steel plate.With the increase of pile length,the strain of the pile shaft at the same position from the pile top increases,but the maximum strain remains the same,which occurs at the pile top.

关 键 词：雪花形钢板桩 桩身变形 竖向荷载 数值模拟 模型试验 

分 类 号：TU441[建筑科学—岩土工程]