PC桩联合塑料排水板堆载预压法处理软基数值模拟探析  

Numerical Simulation of PC Pipe Piles Combined with Plastic Drain Board for Preloading Soft Foundation Treatment

作　　者：李雪锋 赵倩 王翀霄 程钰博 李耀东 徐振扬 Li Xuefeng;Zhao Qiang;Wang Chongxiao;Cheng Yubo;Li Yaodong;Xu Zhenyang(Kunshan City Traffic Engineering Quality Supervision Station,Suzhou,Jiangsu 215300;Hohai University,Nanjing,Jiangsu 210098)

机构地区：[1]昆山市交通工程质量监督站,江苏苏州215300 [2]河海大学,江苏南京210098

出　　处：《工程技术研究》2020年第17期1-3,共3页Engineering and Technological Research

基　　金：江苏省研究生科研与实践创新计划项目(SJCX20_0615)。

摘　　要：文章选取软土层较为深厚的昆山市312国道青龙港桥头段为研究对象,采用PLAXIS 2D建模分析了PC-400预应力混凝土管桩桩间距以及塑料排水板堆载预压法对地基沉降的影响。结果表明:在桩间距2.0~3.2m范围内,随着桩间距的减小,工后沉降逐渐减小,但减小幅度也随之下降,间距小于2.6m,处理效果变化不大;塑料排水板堆载预压法能较大缩短预压时间,就该工程实例而言,采用14m长的塑料排水板预压3个月可达到无排水板预压6个月的效果。The bridge head section of Qinglonggang,National Highway 312,Kunshan City,where the soft soil layer is relatively deep,was selected,and the impact of prestressed concrete pipe piles with an outer diameter of 400 mm(PC-400 pipe piles)spacing and plastic drain board preloading on foundation settlement were analyzed using PLAXIS 2D modeling.The results show that in the range of pile spacing 2.0~3.2m,as the pile spacing decreases,the post-construction settlement gradually decreases,but the reduction also decreases.The spacing is less than 2.6m,and the treatment effect does not change much;The plastic drain board preloading method can greatly shorten the preloading time.In the case of this project,using 14m long plastic drain boards to preload for 3 months can achieve the effect of 6 months of preloading without plastic drain board.

关 键 词：PC管桩 塑料排水板 堆载预压 数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]