|
|
论文:2022,Vol:40,Issue(6):1366-1374 |
|
|
引用本文： |
|
|
李丽华, 郑志刚, 严寒, 黄少平, 周鑫隆. 土工格栅加筋土挡墙土压力分析及其计算方法改进[J]. 西北工业大学学报 |
|
|
LI Lihua, ZHENG Zhigang, YAN Han, HUANG Shaoping, ZHOU Xinlong. Analysis of earth pressure on geogrid reinforced retaining wall and improvement of its calculation method[J]. Journal of Northwestern Polytechnical University |
|
|
|
|
|
|
|
| 土工格栅加筋土挡墙土压力分析及其计算方法改进 |
|
| 李丽华, 郑志刚, 严寒, 黄少平, 周鑫隆 |
|
| 湖北工业大学 土木建筑与环境学院, 湖北 武汉 430068 |
| 摘要: |
| 土压力分布规律与计算方法一直是加筋土挡墙研究中的难点问题。通过有限元方法探究了不同工况下加筋土挡墙主动土压力的大小和分布规律。结合内、外摩擦角的动态发挥提出针对非极限状态下的土压力计算方法,并与传统理论公式解、有限元数值解和实测结果进行对比,验证其合理性。结果表明:挡墙土压力数值大小受到土工格栅刚度和层数影响,呈现出随配筋层数和刚度增加,土压力逐渐减小的趋势。挡墙土压力大小与深度呈负相关,不同工况下加筋土挡墙土压力随深度变化趋势差异不大,加筋效果主要体现在挡墙上部。采用改进经验公式得到的非极限状态计算结果与实测结果整体一致,证明了改进公式的合理性。 |
| 关键词:
土压力
数值模拟
土工格栅
加筋土挡墙
外摩擦角
|
|
| Analysis of earth pressure on geogrid reinforced retaining wall and improvement of its calculation method |
|
| LI Lihua, ZHENG Zhigang, YAN Han, HUANG Shaoping, ZHOU Xinlong |
|
| School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China |
| Abstract: |
| The distribution law and calculation method of earth pressure have always been a difficult problem in the research of reinforced retaining wall. In this paper, the magnitude and distribution law of active earth pressure of reinforced earth retaining wall under different working conditions are explored by using the numerical simulation finite element method. Combined with the dynamic play of the internal and external friction angles, a calculation method of earth pressure under non-limit state is proposed, and it is compared with the traditional theoretical formula solutions, finite element numerical solutions and measured results to verify its rationality. The results show that the numerical value of the earth pressure of the retaining wall is affected by the stiffness and the number of layers of the geogrid, showing a general trend that the earth pressure gradually decreases with the increasing of number of the reinforcement layers and the stiffness. The earth pressure of the retaining wall is negatively correlated with the depth. The earth pressure of the reinforced earth retaining wall varies slightly with the depth under different working conditions, and the reinforcement effect is mainly reflected in the upper part of the retaining wall. The non-limit state calculation results obtained by using the improved empirical formula are consistent with the measured results, which proves that the improved formula is reasonable. |
| Key words:
earth pressure
numerical simulation
geogrid
reinforced retaining wall
external friction angle
|
|
| 收稿日期: 2022-03-10
修回日期:
|
| DOI: 10.1051/jnwpu/20224061366 |
| 基金项目: 武汉市应用基础前沿专项(2020020601012278)、国家自然科学基金(52278347,52108315)、湖北省重点研发计划(2022BCA059)与湖北工业大学杰出人才基金(XJ2021000501)资助 |
| 通讯作者: 黄少平(1989—),湖北工业大学讲师、博士,主要从事斜坡岩土体稳定性分析评价与利用研究。 e-mail:792116933@qq.com
Email：792116933@qq.com |
| 作者简介: 李丽华(1978—),湖北工业大学教授,主要从事加筋土及环境岩土研究
|
|
|
|
|
|
|
|
参考文献: |
|
|
[1] CHOWDHURY S S. A study on lateral earth pressure against strutted retaining wall in cohesionless soil deposit[J]. International Journal of Geotechnical Engineering, 2017, 13(2):122-138
[2] AHMADABADI M, GHANBARI A. New procedure for active earth pressure calculation in retaining walls with reinforced cohesive-frictional backfill[J]. Geotextiles & Geomembranes, 2009, 27(6):456-463
[3] VAHEDIFARD F, LESHCHINSKY B A, MORTEZAEI K, et al. Active earth pressures for unsaturated retaining structures[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2015, 141(11):04015048
[4] YOO C, LEE D. Deep excavation-induced ground surface movement characteristic a numerical investigation[J]. Computers & Geotechnics, 2008, 35(2):231-252
[5] HSIUNG B C B. A case study on the behaviour of a deep excavation in sand[J]. Computers & Geotechnics, 2009, 36(4):665-675
[6] BILGIN O. Numerical studies of anchored sheet pile wall behavior constructed in cut and fill conditions[J]. Computers & Geotechnics, 2010, 37(3):399-407
[7] LI L. Behavior of tire-geogrid-reinforced retaining wall system under dynamic vehicle load[J]. International Journal of Geomechanics, 2020, 20(4):04020017
[8] 汪益敏, 闫岑, 于恒, 等. 静载作用下土工格栅加筋拓宽路堤土中应力特征试验研究[J]. 岩土力学,2018,39(增刊1):311-317 WANG Yimin, YAN Cen, YU Heng, et al. Experimental study on stress characteristics of geogrid reinforced widening embankment soil under static load[J]. Rock and Soil Mechanics, 2018, 39(suppl 1):311-317 (in Chinese)
[9] 王家全, 徐良杰, 黄世斌, 等. 动载下土工格栅加筋桥台挡墙承载性能分析[J]. 岩土力学,2019,40(11):4220-4228 WANG Jiaquan, XU Liangjie, HUANG Shibin, et al. Analysis of bearing capacity of geogrid reinforced abutment retaining wall under dynamic load[J]. Rock and Soil Mechanics, 2019, 40(11):4220-4228 (in Chinese)
[10] SRBULOV M. Active earth pressure in cohesive soils with an inclined ground surface[J]. Canadian Geotechnical Journal, 2010, 37:171-177
[11] LEE I K, HERRINGTON J R. A theoretical study of the pressure acting on a rigid wall by sloping earth or rock fill[J]. Geotechnique, 1972, 22(1):1-27
[12] BATHURST R, ALLEN T, WALTERS D. Reinforcement loads in geosynthetic walls and the case for a new working stress design method[J]. Geotextiles and Geomembranes, 2005, 23(4):287-322
[13] SILVESTRI V. Active earth pressure in cohesive soils with an inclined ground surface[J]. Canadian Geotechnical Journal, 2001, 37(1):171-177
[14] CHENG Y M. Seismic lateral earth pressure coefficients for c-φ soils by slip line method[J]. Computers and Geotechnics, 2003, 30(8):661-670
[15] LIU F Q, WANG J H, ZHANG L L. Axi-symmetric active earth pressure obtained by the slip line method with a general tangential stress coefficient[J]. Computers and Geotechnics, 2009, 36(1/2):352-358
[16] 李丽华, 李行, 肖衡林, 等. 加筋土挡墙压实应力数值模拟分析[J]. 岩石力学与工程学报, 2020, 39(增刊1), 3130-3138 LI Lihua, LI Hang, XIAO Henglin, et al. Numerical simulation analysis of compaction stress of reinforced earth retaining wall[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(suppl 1):3130-3138 (in Chinese)
[17] 李丽华, 石安宁, 肖衡林, 等. 加筋土挡墙静载模型试验及其力学性能研究[J]. 岩土力学, 2018, 39(12):4360-4368 LI Lihua, SHI Anning, XIAO Henglin, et al. Static load model test and mechanical properties of reinforced earth retaining wall[J]. Rock and Soil Mechanics, 2018, 39(12):4360-4368 (in Chinese)
[18] FUMIO T, SHINYA N, CHINGCHUANG H. et al. Strength anisotropy and shear band direction in plane strain tests of sand[J]. Soils and Foundations, 1990, 30(1):35-54
[19] TATSUOKA F, HAIBARA O. Shear resistance between sand and smooth or lubricated surfaces[J]. Soils and Foundations, 2008, 25(1):89-98
[20] RUIKEN A. Zum spannungs-dehnungsverhalten des verbundbaustoffs geogitterbewehrter boden[D]. Nordrhein-Westfalen:Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013
[21] JACOBS F, RUIKEN A, ZIEGLER M. Investigation of kinematic behavior and earth pressure development of geogrid reinforced soil walls[J]. Transportation Geotechnics, 2016, 8:57-68
[22] 高水琴. 考虑时间效应的软土地基上加筋土挡墙性能研究[D]. 广州:华南理工大学, 2011 GAO Shuiqin. Study on performance of reinforced earth retaining wall on soft soil foundation considering time effect[D]. Guangzhou:South China University of Technology, 2011 (in Chinese)
[23] BATHURST R J, BENJAMIN D J. Preliminary assessment of sidewall friction on large-scale wall models in the RMC test facility//The application of polymeric reinforcement in soil retaining structures[M]. Dordrecht:Springer, 1988
[24] JARRETT P M, MCGOWN A. Reinforced soil wall analysis and behaviour[M]. Netherlands:Springer, 1988
[25] JAYASREE P K, RAJAGOPAL K, GNANENDRAN C T. Influence of sidewall friction on the results of small-scale laboratory model tests:numerical assessment[J]. International Journal of Geomechanics, 2012, 12(2):119-126
[26] 徐日庆, 龚慈, 魏纲, 等. 考虑平动位移效应的刚性挡土墙土压力理论[J]. 浙江大学学报工学版, 2005, 39(1):119-122 XU Riqing, GONG Ci, WEI Gang, et al. Earth pressure theory of rigid retaining wall considering translational displacement effect[J]. Journal of Zhejiang University Engineering Edition, 2005, 39(1):119-122 (in Chinese)
[27] 陈林. 不同变位模式下挡土墙主动土压力计算方法研究[D]. 重庆:重庆大学, 2010 CHEN Lin. Study on calculation method of active earth pressure of retaining wall under different displacement modes[D]. Chongqing:Chongqing University, 2010 (in Chinese)
[28] 卢坤林, 杨扬. 考虑位移影响的主动土压力近似计算方法[J]. 岩土力学, 2009(2):553-557 LU Kunlin, YANG Yang. Approximate calculation method of active earth pressure considering displacement effect[J]. Rock and Soil Mechanics, 2009(2):553-557 (in Chinese) |
|
|
|
|
|
|
|
