[1]王非,缪林昌.落水洞上覆路堤土工加筋设计新方法[J].东南大学学报(自然科学版),2009,39(6):1217-1221.[doi:10.3969/j.issn.1001-0505.2009.06.025]
 Wang Fei,Miao Linchang.New design method of geosynthetic-reinforced embankment over sinkholes[J].Journal of Southeast University (Natural Science Edition),2009,39(6):1217-1221.[doi:10.3969/j.issn.1001-0505.2009.06.025]
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落水洞上覆路堤土工加筋设计新方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第6期
页码:
1217-1221
栏目:
交通运输工程
出版日期:
2009-11-20

文章信息/Info

Title:
New design method of geosynthetic-reinforced embankment over sinkholes
作者:
王非 缪林昌
东南大学岩土工程研究所,南京 210096
Author(s):
Wang Fei Miao Linchang
Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,China
关键词:
土工织物 落水洞 不完全发展的剪应力 不完全发展的土拱效应 土拱高度
Keywords:
geosynthetics sinkholes partially-developed shear stress partially-developed soil arching effect soil arch height
分类号:
U213.14
DOI:
10.3969/j.issn.1001-0505.2009.06.025
摘要:
为了改变由于土工织物的存在抑制了落水洞上覆路堤土不均匀变形,使得路堤中的土拱效应和剪应力不能完全发展的问题,提出了基于不完全发展的土拱效应的设计方法.首先根据Handy的土拱为最小主应力拱的假设,利用摩尔圆推导出了在土工织物不同挠曲变形时土中剪应力的计算方法.然后将其与土拱效应的计算理论相结合提出了不完全发展的土拱效应计算公式.最后考虑不同的填土高度,以不完全发展的土拱效应计算理论为基础得到土拱高度确定方法.利用数值分析和本文方法以及现有的设计方法分别计算同一算例,结果表明,所提出的方法与数值分析计算结果更为接近.这证明在用土工织物加固落水洞上覆路堤时考虑土中剪应力的不完全发展更符合工程的实际情况.
Abstract:
The current methods of designing the embankment over sinkholes reinforced by geosynthetic are based on the assumption that the shear stress in the fill soil is fully-developed. However,the existence of the geosynthetic can block the development of the differential settlement,which can consequently induce the partially developing of the shear stress and the soil arching effect. To overcome this insufficiency,a new method is proposed, which is based on the assumption presented by Handy that the soil arch is the minor principle stress arch. By using the Mohr circle the formula of shear stress at different geosynthetic deflection is derived. Combining with the soil arching calculation procedure,the partially-developing soil arching method is presented. Finally,considering the different height of the embankments,the soil arch height determination method is developed based on the proposed partially-developing soil arching method. A comparison of the results from the numerical method,the proposed method,and the current design method demonstrates that the proposed method is more close to the numerical result,which means the proposed method is more accurate than the current design method.

参考文献/References:

[1] Giroud J P,Bonaparte R,Beech J F,et al.Design of soil layer-geosynthetic systems overlying voids[J].Geotextiles and Geomembranes,1990,9(1):11-50.
[2] Villard P,Briancon L.Design of geosynthetic reinforcements for platforms subjected to localized sinkholes[J].Can Geotech J,2008,45(2):196-209.
[3] Bonaparte R,Berg R R.The use of geosynthetics to support roadways over sinkhole prone areas[C] //Proceedings of the 2nd Multidisciplinary Conference on Sinkhole and the Environmental Impacts of Karst. Orlando,Florida,USA,1987:437-445.
[4] British Standard Institution.BS 8006 Code of practice for strengthened/reinforced soils and other fills[S].London:British Standards Institution,1995.
[5] Han J,Wang F,Miao L C.Numerical analysis of embankments supported by geosynthetics over drilled shafts in Karst terrain[C] //Proceedings of 11th Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst. Tallahassee,FL,USA,2008:22-16.
[6] Wang M C,Feng Y X,Jao M.Stability of geosyntheticreinforced soil above a cavity[J].Geotextiles and Geomembranes,1996,14(1):95-109.
[7] Briancon L,Villard P.Design of geosynthetic-reinforced platforms spanning localized sinkholes[J].Geotextiles and Geomembranes,2008,26(4):416-428.
[8] Terzaghi K.Theoretical soil mechanics[M].New York:John Wiley & Sons,1943.
[9] Villard P,Gourc J P,Giraud H.Ageosynthetic reinforcement solution to prevent the formation of localized sinkholes[J].Can Geotech J,2000,37(5):987-999.
[10] Handy R L.The arch in soil arching[J].Journal of Geotechnical Engineering,1985,111(3):302-317.

备注/Memo

备注/Memo:
作者简介: 王非(1982—),男,博士生; 缪林昌(联系人),男,博士,教授,博士生导师,lc.miao@seu.edu.cn.
基金项目:国家自然科学基金资助项目(50478072)、江苏省“六大人才高峰”资助项目.
引文格式: 王非,缪林昌.落水洞上覆路堤土工加筋设计新方法[J].东南大学学报:自然科学版,2009,39(6):1217-1221.
[doi:10.3969/j.issn.1001-0505.2009.06.025]
更新日期/Last Update: 2009-11-20