桩承式加筋地基室内试验及数值分析

›› 2012, Vol. 33 ›› Issue (S1): 244-250.

桩承式加筋地基室内试验及数值分析

刘飞禹¹，余炜¹，蔡袁强²，张孟喜¹

1. 上海大学土木工程系，上海 200072；2. 浙江大学软弱土与环境土工教育部重点实验室，杭州 310027

收稿日期:2011-01-18 出版日期:2012-09-11 发布日期:2012-09-21
作者简介:刘飞禹，男，1976年生，博士，副教授，主要从事加筋土的动力响应研究
基金资助:
国家自然科学基金资助项目(No. 50808119)；国家高技术研究发展计划资助项目(No. 2009AA032303)；上海大学创新基金资助项目(2007年)

Model test and numerical analysis of geogrid-reinforced pile-supported foundation

LIU Fei-yu¹, YU Wei¹, CAI Yuan-qiang², ZHANG Meng-xi¹

1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2. MOE Key Laboratory of Soft Soils and Geoenviromental Engineering, Zhejiang University, Hangzhou 310027, China)

Received:2011-01-18 Online:2012-09-11 Published:2012-09-21

摘要/Abstract

摘要： 为研究桩承式加筋地基作用机制及影响加筋效果的因素，设计天然软土地基、土工格栅加筋地基、桩承式地基、桩承式加筋地基4组模型试验，通过对试验结果的对比，分析阐述桩承式加筋地基的作用机制。同时，将三维数值模拟的结果与试验结果进行对比验证，在此基础上采用三维流固耦合的数值模型研究影响桩承式加筋地基处理效果的因素。研究结果表明，4组试验中，桩承式加筋地基加载板的沉降量最小，承载力最大；桩承式加筋地基的桩土应力比大于同样荷载条件下的桩承式地基；随着桩间距的增大，桩承式加筋地基表面沉降逐渐增大，桩土应力比逐渐减小；随着格栅模量的增加，桩承式加筋地基表面沉降逐渐减小，桩土应力比逐渐增大。

关键词: 桩承式加筋地基, 模型试验, 土工格栅

Abstract: In order to investigate the mechanism and the beneficial effect of geogrid-reinforced pile-supported foundation, four comparative model tests were carried out, including unreinforced and no-pile foundation, geogrid-reinforced foundation, pile-supported foundation without geogrid, geogrid-reinforced and pile-supported foundation. The mechanism of geogrid-reinforced pile-supported foundation was described by comparing the results of the tests. The measured and computed results were compared and discussed, and then three-dimensional coupled mechanical and hydraulic numerical simulations were conducted to investigate the beneficial effect of geogrid-reinforced pile-supported foundation. The results show that the vertical displacement of geogrid- reinforced and pile-supported foundation are smaller than that of other cases, while the bearing capacity is larger than that of others. The pile-soil stress ratio of geogrid-reinforced pile-supported foundation is less than that of pile-supported foundation without geogrid under the same loading. With the increase of the spacing between piles, the vertical displacement of geogrid-reinforced and pile-supported foundation increases, while the pile-soil stress ratio decrease. With the increase of geogrid stiffness, the vertical displacement of geogrid-reinforced and pile-supported foundation decrease, while the pile-soil stress ratio increase.

Key words: geogrid-reinforced pile-supported foundation, model tests, geogrid

中图分类号:

TU 473

刘飞禹，余炜，蔡袁强，张孟喜 . 桩承式加筋地基室内试验及数值分析[J]. , 2012, 33(S1): 244-250.

LIU Fei-yu , YU Wei , CAI Yuan-qiang , ZHANG Meng-xi . Model test and numerical analysis of geogrid-reinforced pile-supported foundation[J]. , 2012, 33(S1): 244-250.

参考文献

相关文章 15

[1]	王国辉, 陈文化, 聂庆科, 陈军红, 范晖红, 张川, . 深厚淤泥质土中基坑开挖对基桩影响的离心模型试验研究[J]. 岩土力学, 2020, 41(2): 399-407.
[2]	陈贺, 张玉芳, 张新民, 魏少伟, . 高压注浆钢花管微型桩抗滑特性足尺模型试验研究[J]. 岩土力学, 2020, 41(2): 428-436.
[3]	于一帆, 王平, 王会娟, 许书雅, 郭海涛, . 堆积层滑坡地震动力响应的物理模型试验[J]. 岩土力学, 2019, 40(S1): 172-180.
[4]	雷华阳, 胡垚, 雷尚华, 祁子洋, 许英刚, . 增压式真空预压加固吹填超软土微观结构特征分析[J]. 岩土力学, 2019, 40(S1): 32-40.
[5]	王东坡, 陈政, 何思明, 陈克坚, 刘发明, 李明清, . 泥石流冲击桥墩动力相互作用物理模型试验[J]. 岩土力学, 2019, 40(9): 3363-3372.
[6]	陈宇龙, 内村太郎, . 基于弹性波波速的降雨型滑坡预警系统[J]. 岩土力学, 2019, 40(9): 3373-3386.
[7]	王钦科, 马建林, 陈文龙, 杨彦鑫, 胡中波, . 上覆土嵌岩扩底桩抗拔承载特性离心模型试验及计算方法研究[J]. 岩土力学, 2019, 40(9): 3405-3415.
[8]	卢谅, 石通辉, 杨东, . 置换减载与加筋复合处理方法对路基不均匀沉降控制效果研究[J]. 岩土力学, 2019, 40(9): 3474-3482.
[9]	杨文波, 邹涛, 涂玖林, 谷笑旭, 刘雨辰, 晏启祥, 何川. 高速列车振动荷载作用下马蹄形断面隧道动力响应特性分析[J]. 岩土力学, 2019, 40(9): 3635-3644.
[10]	蔡雨, 徐林荣, 周德泉, 邓超, 冯晨曦, . 自平衡与传统静载试桩法模型试验研究[J]. 岩土力学, 2019, 40(8): 3011-3018.
[11]	孙飞, 张志强, 易志伟. 正断层黏滑错动对地铁隧道结构影响的模型试验研究[J]. 岩土力学, 2019, 40(8): 3037-3044.
[12]	詹良通, 胡英涛, 刘小川, 陈捷, 王瀚霖, 朱斌, 陈云敏. 非饱和黄土地基降雨入渗离心模型试验及多物理量联合监测[J]. 岩土力学, 2019, 40(7): 2478-2486.
[13]	周东, 刘汉龙, 仉文岗, 丁选明, 杨昌友, . 被动桩侧土体位移场的透明土模型试验[J]. 岩土力学, 2019, 40(7): 2686-2694.
[14]	赵晓彦, 范宇飞, 刘亮, 蒋楚生, . 铁路台阶式加筋土挡墙潜在破裂面特征模型试验[J]. 岩土力学, 2019, 40(6): 2108-2118.
[15]	储昭飞, 刘保国, 任大瑞, 宋宇, 马强, . 软岩流变相似材料的研制及物理模型试验应用[J]. 岩土力学, 2019, 40(6): 2172-2182.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed