真空预压条件下的砂井地基Hansbo固结解

摘要
图/表
参考文献(19)
相关文章 (15)

全文: PDF (522 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要结合真空预压时的实际边界条件，引入负压沿砂井的线性衰减分布模式，将Hansbo砂井地基径向固结理论推广到真空预压(负压)情况，并与现有的董志良解及Indraratna解进行比较，以验证其正确性。结果表明，3种解析解得到的任意时刻径向固结度Ur的关系为：本文解＞董志良解＞Indraratna解。当时间因素Th≤0.5时，三者间相对误差较大，但绝对误差很小，随着时间的增长(Th＞0.5)，误差逐渐减小。本文解较Indraratna解更接近较为严密的董志良解，且本文解形式简单，利于工程推广应用。当不考虑井阻作用时，3种解析解均可简化为负压条件下的无井阻固结Hansbo解。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	周琦
	张功新
	王友元
	邓志勇

关键词 ：土力学, 真空预压, 砂井地基径向固结理论, Hansbo解, 砂井中负压分布模式

Abstract：The Hansbos consolidation theory for sand-drained ground was extended to the condition of vacuum preloading，in which the distribution pattern of negative pressure along the sand drain was considered，and then it was compared with the existing Dong Zhiliangs solution and Indraratnas solution to verify its correctness. The results show that the relation of the radial consolidation degree Ur obtained by the three analytical solutions is that the new solution＞Dong Zhiliangs solution＞Indraratnas solution. When Th≤0.5，the relative error among the three analytical solutions is relatively large，but the absolute error is small；and then the error decrease gradually with time(Th＞0.5). The new solution is more close to Dong Zhiliangs solution than Indraratnas solution；and its form is simple，which is advantaged to engineering practice. When the well resistance of sand drain isnt considered，the three analytical solutions can be simplified to Hansbos solution under vacuum preloading.

Key words： soil mechanics vacuum preloading radial consolidation theory for sand-drained ground Hansbos solution distribution pattern of negative pressure in sand drain

引用本文:

周琦，张功新，王友元，邓志勇. 真空预压条件下的砂井地基Hansbo固结解[J]. 岩石力学与工程学报, 2010, 29(S2): 3994-3999.
ZHOU Qi，ZHANG Gongxin，WANG Youyuan，DENG Zhiyong. HANSBOS CONSOLIDATION SOLUTION FOR SAND-DRAINED GROUND UNDER VACUUM PRELOADING. , 2010, 29(S2): 3994-3999.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/3994

[1] BARRON R A. Consolidation of fine-grained soils by drain wells[J]. Transaction of the American Society of Civil Engineers，1948，113：718–754.

[2] YOSHIKUNI H，NAKANODO H. Consolidation of soils by vertical drain wells with finite permeability[J]. Soils and Foundations，1974，14(2)：35–46.

[3] Hansbo S. Consolidation of fine-grained soils by prefabricated drains[C]// Proceedings of 10th International Conference on Soil Mechanics and Foundation Engineering. Stockholm：[s.n.]，1981：677–682.

[4] 谢康和，曾国熙. 等应变条件下的砂井地基固结解析理论[J]. 岩土工程学报，1989，11(2)：3–17.(XIE Kanghe，ZENG Guoxi. Consolidation theories for drain wells under equal strain condition[J]. Chinese Journal of Geotechnical Engineering，1989，11(2)：3–17.(in Chinese))

[5] 谢康和，周开茂. 未打穿竖向排水井地基固结理论[J]. 岩土工程学报，2006，28(6)：679–684.(XIE Kanghe，ZHOU Kaimao. Consolidation theory for soft soil with partially penetrated vertical drains[J]. Chinese Journal of Geotechnical Engineering，2006，28(6)：679–684.(in Chinese))

[6] 闫富有. 砂井地基径向非线性固结解析[J]. 郑州大学学报(工程科学版)，2007，28(2)：35–38.(YAN Fuyou. Analysis of radial nonlinear consolidation of sand drain ground[J]. Journal of Zhengzhou University (Engineering Science)，2007，28(2)：35–38.(in Chinese))

[7] 耿雪玉. 复杂条件下软黏土地基多维固结分析[博士学位论文][D]. 杭州：浙江大学，2008.(GENG Yuxue. Multi-dimensional consolidation of soft soils under complicated conditions[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2008.(in Chinese))

[8] 刘加才. 层状砂井地基固结分析及其工程应用[博士学位论文][D]. 南京：河海大学，2004.(LIU Jiacai. Consolidation analysis for layered-ground improved by sand wells and its engineering application [Ph. D. Thesis][D]. Nanjing：Hohai University，2004.(in Chinese))

[9] 董志良. 堆载及真空预压砂井地基固结解析理论[J]. 水运工程，1992，(9)：1–7.(DONG Zhiliang. Analytical consolidation theory of sand drain ground under preloading with vacuum preloading[J]. Port and Waterway Engineering，1992，(9)：1–7.(in Chinese))

[10] INDRARATNA B，RUJIKIATKAMJORN C，SATHANANTHAN L. Analytical and numerical solutions for a single vertical drain including the effects of vacuum preloading[J]. Canadian Geotechnical Journal，2005，42(4)：994–1014.

[11] 刘家豪，董志良. 塑料排水板真空预压法加固软基固结理论解析讨论[C]// 塑料板排水固结法加固软基技术研讨会论文集. 南京：河海大学出版社，1990，285–294.(LIU Jiahao，DONG Zhiliang. Analytical consolidation theory of PVD ground under vacuum preloading[C]// Proceedings of the Conference on Reinforcement Technology of Soft Soil with PVD. Nanjing：Hohai University Press，1990，285–294.(in Chinese))

[12] 彭劼，刘汉龙，陈永辉，等. 真空–堆载联合预压法软基加固对周围环境的影响[J]. 岩土工程学报，2002，24(5)：656–659.(PENG Jie，LIU Hanlong，CHEN Yonghui， et al. Effect of soft ground under preloading with vacuum preloading on environment[J]. Chinese Journal of Geotechnical Engineering，2002，24(5)：656–659.(in Chinese))

[13] 沈珠江，陆舜英. 软土地基真空排水预压的固结变形分析[J]. 岩土工程学报，1986，8(3)：7–15.(SHEN Zhujiang，LU Shunying. Consolidation deformation of soft soil under vacuum preloading[J]. Chinese Journal of Geotechnical Engineering，1986，8(3)：7–15.(in Chinese))

[14] 刘佳有，吴正友，席平. 国产SPB-1型和日本丸红GEODRAIN－L型塑料排水板真空度传递性能的现场试验研究[C]// 塑料板排水固结法加固软基技术研讨会论文集. 南京：河海大学出版社，1990：86–96.(LIU Jiayou，WU Zhengyou，Xi Ping. Performance of vacuum degree diffusion in SPB-1 PVD and GEODRAIN-L PVD[C]// Proceedings of the Conference on Reinforcement Technology of Soft Soil with PVD. Nanjing：Hohai University Press，1990：86–96.(in Chinese))

[15] 李建宁. 关于塑料排水板一些问题的讨论[C]// 塑料板排水固结法加固软基技术研讨会论文集. 南京：河海大学出版社，1990：260–267.(LI Jiannin. Discussion on some problems of PVD[C]// Proceedings of the Conference on Reinforcement Technology of Soft Soil with PVD. Nanjing：Hohai University Press，1990：86–96.(in Chinese))

[16] HANSBO S. How to evaluate the properties of prefabricated drains[C]// Proceedings of the 8th European Conference on Soil Mechanics and Foundation Engineering. Helsinki：[s.n.]，1983：621–626.

[17] CHAI J C，MIURA N，BERGADO D T. Behavior of vertical drain improved subsoil under embankment loading[J]. Soils and Foundations，1995，35(4)：49–61.

[18] CHAI J C，MIURA N. Investigation of factors affecting vertical drain bahavior[J]. Journal of Geotechnical and Geoenvironmental Engineering，1999，125(3)：216–266.

[19] 岑仰润. 真空预压加固地基的试验及理论研究[博士学位论文][D]. 杭州：浙江大学，2003.(CEN Yangrun. Vacuum preloading：experiment and theory[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2003.(in Chinese))