底部抽真空预压法砂井地基固结解析解

›› 2014, Vol. 35 ›› Issue (10): 2787-2793.

底部抽真空预压法砂井地基固结解析解

张福海^{1, 2}，陈雷³，郭帅杰⁴，任朋勋^{1, 2}

1. 河海大学岩土力学与堤坝工程教育部重点实验室，南京 210098；2. 河海大学岩土工程科学研究所，南京 210098； 3. 交通运输部天津水运工程科学研究院，天津 300456；4. 铁道第三勘察设计院集团有限公司，天津 300251

收稿日期:2013-06-18 出版日期:2014-10-11 发布日期:2014-10-27
作者简介:张福海，男，1970年生，副教授，主要从事软土地基处理和岩土工程测试方面的研究工作。
基金资助:
中央高校基本科研业务费专项资金资助(No. 2014B04914)。

Analytical solution for consolidation of sand-drained foundation with bottom vacuum preloading method

ZHANG Fu-hai^{1, 2}，CHEN Lei³，GUO Shuai-jie⁴，REN Peng-xun^{1, 2}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 3. Tianjin Research Insititute for Water Transport Engineering, M.O.T., Tianjin 300456, China; 4. The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251, China

Received:2013-06-18 Online:2014-10-11 Published:2014-10-27

摘要/Abstract

摘要： 基于谢康和等应变条件砂井地基固结理论和Hansbo砂井固结理论，考虑底部抽真空预压法加固方法中真空作用面位于固结土层底部的实际边界条件，推导出忽略竖向渗流情况下的底部真空预压加固地基固结方程解析解答。根据超孔压固结方程形成过程以及其解析解表达式，分析其与一般负压径向固结解答的区别。通过室内模型试验实测数据与解析模型计算结果的对比表明，不同位置处孔压和固结度计算值与实测结果吻合较好，从而验证了该模型的合理性，同时运用该模型也可有效验证已有关于底部抽真空室内模拟及现场原位试验结果。底部抽真空轴对称固结解析解可为底部抽真空技术的实际工程应用提供基础性的理论支持，推动底部抽真空技术的大规模推广应用。

关键词: 砂井地基, 真空预压, 解析解, 模型试验, 固结度

Abstract: According to the equal strain axisymmetric consolidation theory of sand-drained foundation developed by Xie and Hansbo, analytical solutions to the axisymmetric consolidation equation with bottom vacuum preloading are derived in this study as the vertical water flow in soil is neglected for the actual loading boundary condition that the vacuum preloading locates at the bottom. Based on the analytical solution formation process of excessive pore pressure axisymmetric consolidation control equation, a comparison between this new developed model and the current solution is carried out gradually. In comparison of the new model outputs and the experimental results by laboratory test, the excessive pore pressure distribution in vertical direction and the consolidation ratio development trends for excessive pore pressure dissipation can be obtained by the new developed analytical model, and it also can be concluded that the calculated results show a good agreement to the laboratory and site experimental results. Therefore, the analytical solution can be further applied to practical engineerings as basic theoretical foundation, which also promotes the application of bottom vacuum preloading method in soft foundation reinforcement engineering.

Key words: sand-drained foundation, vacuum preloading, analytical solution, model test, consolidation degree

中图分类号:

TU 472.3+3

张福海，陈雷，郭帅杰，任朋勋 , . 底部抽真空预压法砂井地基固结解析解[J]. , 2014, 35(10): 2787-2793.

ZHANG Fu-hai ，CHEN Lei ，GUO Shuai-jie ，REN Peng-xun , . Analytical solution for consolidation of sand-drained foundation with bottom vacuum preloading method [J]. , 2014, 35(10): 2787-2793.

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]	程涛, 晏克勤, 胡仁杰, 郑俊杰, 张欢, 陈合龙, 江志杰, 刘强, . 非饱和土拟二维平面应变固结问题的解析计算方法[J]. 岩土力学, 2020, 41(2): 453-460.
[4]	蒙宇涵, 张必胜, 陈征, 梅国雄, . 线性加载下含砂垫层地基固结分析[J]. 岩土力学, 2020, 41(2): 461-468.
[5]	史吏, 胡东东, 蔡袁强, 潘晓东, 孙宏磊, . 增压式真空预压吹填淤泥孔压实时响应及加固机制初探[J]. 岩土力学, 2020, 41(1): 185-193.
[6]	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.
[7]	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.
[8]	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.
[9]	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.
[10]	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.
[11]	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.
[12]	张玉国, 万东阳, 郑言林, 韩帅, 杨晗玥, 段萌萌. 考虑径向渗透系数变化的真空预压竖井地基固结解析解[J]. 岩土力学, 2019, 40(9): 3533-3541.
[13]	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.
[14]	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.
[15]	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.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed