[1]韩文君,刘松玉,章定文,等.基于双对数压缩模型的真空预压非线性固结解[J].东南大学学报(自然科学版),2013,43(5):967-972.[doi:10.3969/j.issn.1001-0505.2013.05.012]
 Han Wenjun,Liu Songyu,Zhang Dingwen,et al.Nonlinear consolidation of subsoil by vacuum preloading based on bi-logarithmic coordinate compression model[J].Journal of Southeast University (Natural Science Edition),2013,43(5):967-972.[doi:10.3969/j.issn.1001-0505.2013.05.012]
点击复制

基于双对数压缩模型的真空预压非线性固结解()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
967-972
栏目:
土木工程
出版日期:
2013-09-20

文章信息/Info

Title:
Nonlinear consolidation of subsoil by vacuum preloading based on bi-logarithmic coordinate compression model
作者:
韩文君12刘松玉1章定文1刘维正3
1东南大学交通学院, 南京 210096; 2常州市轨道交通发展有限公司, 常州 213022; 3中南大学土木工程学院, 长沙 410075
Author(s):
Han Wenjun12 Liu Songyu1 Zhang Dingwen1 Liu Weizheng3
1School of Transportation, Southeast University, Nanjing 210096, China
2Changzhou Rail Transportation Development Co., Ltd., Changzhou 213022, China
3School of Civil Engineering, Central Southeast University, Changsha 410075, China
关键词:
真空预压法 压缩模型 径向固结 解析解 因素分析
Keywords:
vacuum preloading compression model radial consolidation analytical solution factor analysis
分类号:
TU472
DOI:
10.3969/j.issn.1001-0505.2013.05.012
摘要:
考虑真空荷载实际边界条件,引入对土体压缩曲线线性化的双对数坐标,建立了真空预压砂井地基非线性固结近似解答;利用模型试验结果验证了解答的可靠性,并分析了真空度衰减和土性参数对固结性状的影响.研究结果表明,考虑了真空荷载衰减及双对数坐标的解答计算得到的土体沉降、超静孔压与实测值最为接近.对于超固结土而言,基于变形计算的固结度随着压缩指数与渗透指数比值的增大而减小,随着真空荷载衰减系数的减小而减小;当压缩指数与渗透指数比值大于1时,正常固结状态中基于孔压计算的固结度随真空荷载衰减系数的减小而增大.随着压缩指数与回弹指数比值的增大,地基超静孔压消散速率也随之增加,沉降速率在超固结状态时随之减缓,在正常固结状态时则随之加快,土体由超固结状态进入正常固结状态的时间随之变长.
Abstract:
Based on the bi-logarithmic coordinate compression model and actual vacuum pressure along the drain for normally consolidated and over-consolidated clays, a new analytical solution of the radial consolidation of subsoil by vacuum preloading was derived. The analytical solution was verified by the model test, and the influences of vacuum pressure attenuation and soil parameters on consolidation were analyzed. The results show that the calculated settlement and the excess pore water pressure are most close to the measured data in model tests. For over-consolidated clays, the consolidation degree calculated by deformation decreases with the increase of the ratio of the compression index and the permeability index and with the decease of the vacuum pressure attenuation coefficient. When the ratio of the compression index and the permeability index is more than one, the consolidation degree in normal consolidation state calculated by pore water pressure increases with the decrease of the vacuum pressure attenuation coefficient. With the increase of the ratio of the compression index and the expansion index, the dissipation rate of the excess pore water pressure and the settlement rate in normally consolidated state increase. However, in over-consolidated state, the settlement rate decreases and the stay time is prolonged.

参考文献/References:

[1] 龚晓南. 地基处理手册[M]. 3版.北京:中国建筑工业出版社,2008.
[2] 赵维炳. 控制工后沉降处理深厚软土地基[M]. 北京:人民交通出版社,2006.
[3] Schiffman R L, Fungaroli A A. Consolidation due to tangential loads[C]//Proceedings of the 6th International Conference on Soil Mechanics and Foundation Engineering. Montreal, Canada, 1965: 188-192.
[4] Hansbo S, Jamiolkowski M, Kok L. Consolidation by vertical drains[J]. Géotechnique, 1981, 31(1): 45-46.
[5] Indraratna B, Rujikiatkamjorn C, Sathananthan L. Radial consolidation of clay using compressibility indices and varying horizontal permeability[J]. Canadian Geotechnical Journal, 2005, 42(1): 330-341.
[6] 周琦,刘汉龙,陈志波. 考虑固结参数变化时砂井地基的非线性径向固结[J].岩土力学,2007,28(S1):855-858.
  Zhou Qi, Liu Hanlong, Chen Zhibo. Non-linear radial consolidation of sand-drained ground with varying volume compressibility and horizontal permeability[J]. Rock and Soil Mechanics, 2007, 28(S1): 855-858.(in Chinese)
[7] 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. Consolidation theory on heaped load and vacuum preloading of sand drain foundation[J]. Port and Water Engineering, 1992(9): 1-7.(in Chinese)
[8] 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.
[9] 彭劼,董江平,宋恩润,等. 考虑加载过程的真空预压轴对称解析解[J]. 岩土力学,2010,31(S1):79-85.
  Peng Jie, Dong Jiangping, Song Enrun,et al. Axisymmetric analytical solution of vacuum preload considering the loading process[J]. Rock and Soil Mechanics, 2010, 31(S1):79-85.(in Chinese)
[10] Tuan A T, Toshiyuki M. Equivalent plane strain modeling of vertical drains in soft ground under embankment combined with vacuum preloading[J]. Computers and Geotechnics, 2008, 35(5): 655-672.
[11] 张仪萍,严露,俞亚南,等. 真空预压加固软土地基变形与固结计算研究[J]. 岩土力学,2011,32(S1):150-154.
  Zhang Yiping, Yan Lu, Yu Yanan,et al. Solutions for settlement and consolidation of soft ground with vacuum preloading[J]. Rock and Soil Mechanics, 2011, 32(S1):150-154.(in Chinese)
[12] Hansbo S. Consolidation of fine-grained soils by prefabricated drains[C]//Proceedings of the 10th International Conference on Soil Mechanics and Foundation Engineering. Stockholm, Sweden, 1981: 677-682.
[13] Butterfield R. A natural compression law for soils [J]. Géotechnique, 1979, 29(4): 469-480.
[14] 刘维正. 饱和粘性土原位力学特性分析与应用研究[D]. 南京:东南大学交通学院,2011.
[15] 韩文君. 劈裂真空法加固软土地基理论与工程应用研究 [D]. 南京:东南大学交通学院,2012.

相似文献/References:

[1]曾玲玲,刘松玉,洪振舜.考虑土结构性影响的改进EVP压缩模型[J].东南大学学报(自然科学版),2012,42(2):346.[doi:10.3969/j.issn.1001-0505.2012.02.029]
 Zeng Lingling,Liu Songyu,Hong Zhenshun.Modified EVP model considering effect of soil structure[J].Journal of Southeast University (Natural Science Edition),2012,42(5):346.[doi:10.3969/j.issn.1001-0505.2012.02.029]
[2]丁建文,万星,冯旭松,等.高含水率疏浚淤泥固化土的压缩模型[J].东南大学学报(自然科学版),2019,49(2):369.[doi:10.3969/j.issn.1001-0505.2019.02.024]
 Ding Jianwen,Wan Xing,Feng Xusong,et al.Compression model for solidified soil of dredged clays with high water content[J].Journal of Southeast University (Natural Science Edition),2019,49(5):369.[doi:10.3969/j.issn.1001-0505.2019.02.024]

备注/Memo

备注/Memo:
作者简介: 韩文君(1984—),男,博士,工程师;刘松玉(联系人),男,博士,教授,博士生导师,liusy@seu.edu.cn.
基金项目: 国家自然基金资助项目(51078083,51208517).
引文格式: 韩文君,刘松玉,章定文,等.基于双对数压缩模型的真空预压非线性固结解[J].东南大学学报:自然科学版,2013,43(5):967-972. [doi:10.3969/j.issn.1001-0505.2013.05.012]
更新日期/Last Update: 2013-09-20