土工格栅二灰改良土在路基加宽中的应用分析
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摘要
为了实现路基加宽工程中新老路基的有效连接,提出了使用土工格栅二灰改良土加宽路基的技术方法。以沧州市沿海公路路基加宽工程为研究对象,基于面向岩土工程的有限元分析程序MIDAS/GTS建立数值模型,分析土工格栅二灰土加宽路基的改良效果。结果显示土工格栅作为柔性加筋材料,有效改善了所加宽路基的受力性能。
In order to realize effective connection between the new and the existing subgrades in subgrade widening,the method of using lime-flyash-improved soil and geogrid for subgrade widening is put forward.Taking the subgrade widening project of coastal highway in Cangzhou as research subject,and based on the rock-soil-faced ANSYS Midas/GTS platform,the improvement effect of lime-flyash-improved soil and geogrid for subgrade widening is analyzed.The result shows that as a flexible reinforcement material,the geogrid improves effectively the mechanical properties of the widened subgrade.
In order to realize effective connection between the new and the existing subgrades in subgrade widening,the method of using lime-flyash-improved soil and geogrid for subgrade widening is put forward.Taking the subgrade widening project of coastal highway in Cangzhou as research subject,and based on the rock-soil-faced ANSYS Midas/GTS platform,the improvement effect of lime-flyash-improved soil and geogrid for subgrade widening is analyzed.The result shows that as a flexible reinforcement material,the geogrid improves effectively the mechanical properties of the widened subgrade.
引文
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[10]MIDAS/GTS Inc.Theory and Modeling Guide[M].[S.l.]:MIDAS Inc,2000.
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[12]高翔,石名磊,刘松玉.加筋土支挡结构侧向位移的有限元分析[J].公路交通科技,2003,20(2):20-23.GAO Xiang,SHI Minglei,LIU Songyu.Finite element analysis on lateral displacement of reinforced retaining structure[J].Journal of Highway and Transportation Research and Development,2003,20(2):20-23.
[13]杨明,吴德伦.加筋挡墙侧向变形分析模型[J].土木工程学报,2001,4(5):68-71.YANG Ming,WU Delun.A model for lateral displacement of reinforced soil retaining wall[J].China Civil Engineering Journal,2001,4(5):68-71.
[14]汪自力,朱明霞,高青伟,等.饱和-非饱和渗流作用下边坡稳定分析的混合法[J].郑州大学报(工学版),2002,23(1):25-27.WANG Zili,ZHU Mingxia,GAO Qingwei,et al.A composite method to analyse the slop stability under saturated-unsaturated seepage flow[J].Journal of Zhengzhou University(Engineering Science),2002,23(1):25-27.
[15]周亦涛,梁小勇,王蓉蓉,等.工作状态下加筋土挡墙土压力分布规律研究[J].河北科技大学学报,2010,31(1):67-70.ZHOU Yitao,LIANG Xiaoyong,WANG Rongrong,et al.Study on distribution of working lateral soil pressures for reinforced earth retaining wall[J].Journal of Hebei University of Science and Technology,2010,31(1):67-70.
[2]高翔,刘松玉,石名磊.软土地基上高速公路路基扩建加宽中的关键问题[J].公路交通科技,2004,21(2):30-33.GAO Xiang,LIU Songyu,SHI Minglei.Key problems in embankment widening of expressway on soft ground[J].Journal of Highway and Transportation Research and Development,2004,21(2):30-33.
[3]钟勇强,李浩,徐伟.软土地基上路基加宽工程沉降变形的数值分析[J].路基工程,2011,159(6):162-165.ZHONG Yongqiang,LI Hao,XU Wei.Numerical analysis of settlement deformation of subgrade widening engineering in soft foundation[J].Subgrade Engineering,2011,159(6):162-165.
[4]聂鹏,曲向进,刘奉侨,等.沈大高速公路改扩建工程路基加宽容许工后不均匀沉降指标研究[J].公路交通科技,2005,22(11):18-21.NIE Peng,QU Xiangjin,LIU Fengqiao,et al.Allowable differential settlement for widened roadbed in shen-da expressway reconstruction[J].Journal of Highway and Transportation Research and Development,2005,22(11):18-21.
[5]杨广庆,高民欢,陈君朝,等.高速公路改扩建路基加宽锚固加筋技术研究[J].岩土工程学报,2013,35(10):10-15.YANG Guangqing,GAO Minhuan,CHEN Junchao,et al.Anchorage-reinforced technology for subgrade widening project of highways[J].Chinese Journal of Geotechnical Engineering,2013,35(10):10-15.
[6]张轶润,周保华,郭斌,等.改性脱硫灰掺加矿渣粉煤灰制备生态型胶凝材料[J].河北科技大学学报,2009,30(1):35-40.ZHANG Yirun,ZHOU Baohua,GUO Bin,et al.Modified desulphurization ash mixing slag and fly ash toprepare ecocementitious materials[J].Journal of Hebei University of Science and Technology,2009,30(1):35-40.
[7]黄俊,苏向明,江炜平.土坝饱和-非饱和渗流数值分析方法研究[J].岩土工程学报,1990,12(5):30-39.HUANG Jun,SU Xiangming,WANG Weiping.Numerical analysis method for saturated-unsturated seepage flow in earth dams[J].Chinese Journal of Geotechnical Engineering,1990,12(5):30-39.
[8]平扬,白世伟,徐燕平.深基坑工程渗流-应力耦合分析数值模拟研究[J].岩土力学,2001,22(1):37-41.PING Yang,BAI Shiwei,XU Yanping.Numerical simulation of seeapage and stress coupling analysis in deep foundation pit[J].Chinese Journal of Geotechnical Engineering,2001,22(1):37-41.
[9]GRIFFITHS D V,LAN E P A.Slope stability analysis by finite elements[J].Geo-technique,1999,49(3):387-403.
[10]MIDAS/GTS Inc.Theory and Modeling Guide[M].[S.l.]:MIDAS Inc,2000.
[11]BOLTZ L R,BENSON C H,BOUTWELL G P.Estimating optimum water content and maximum dry unit weight for compacted clays[J].Journal of Geotechnical and Geoenvironmental Engineering,1998,24(9):907-912.
[12]高翔,石名磊,刘松玉.加筋土支挡结构侧向位移的有限元分析[J].公路交通科技,2003,20(2):20-23.GAO Xiang,SHI Minglei,LIU Songyu.Finite element analysis on lateral displacement of reinforced retaining structure[J].Journal of Highway and Transportation Research and Development,2003,20(2):20-23.
[13]杨明,吴德伦.加筋挡墙侧向变形分析模型[J].土木工程学报,2001,4(5):68-71.YANG Ming,WU Delun.A model for lateral displacement of reinforced soil retaining wall[J].China Civil Engineering Journal,2001,4(5):68-71.
[14]汪自力,朱明霞,高青伟,等.饱和-非饱和渗流作用下边坡稳定分析的混合法[J].郑州大学报(工学版),2002,23(1):25-27.WANG Zili,ZHU Mingxia,GAO Qingwei,et al.A composite method to analyse the slop stability under saturated-unsaturated seepage flow[J].Journal of Zhengzhou University(Engineering Science),2002,23(1):25-27.
[15]周亦涛,梁小勇,王蓉蓉,等.工作状态下加筋土挡墙土压力分布规律研究[J].河北科技大学学报,2010,31(1):67-70.ZHOU Yitao,LIANG Xiaoyong,WANG Rongrong,et al.Study on distribution of working lateral soil pressures for reinforced earth retaining wall[J].Journal of Hebei University of Science and Technology,2010,31(1):67-70.