土工格室处治半填半挖路基的有限元分析
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摘要
近些年来,随着国民经济持续快速健康发展,高等级公路的建设正以前所未有的发展速度向前推进。由于高等级公路所经过地区的地质条件千差万别,所以需要进行大量的半填半挖处理,以免造成路基的不均匀沉降。路基的不均匀沉降是公路的常见病害之一,它可以导致路面产生较大的横向和纵向开裂,甚至错台、坍塌,严重影响道路的使用性能和服务水平,严重制约着高等级公路工程的建设质量和建成后的长期使用性能。
虽然以前也有许多处理方法,但效果并不理想。土工格室是一种新型的土工合成材料,它工程性能优越,近年来被广泛应用于现代土木工程领域,并取得了良好的加固效果。本文通过理论分析和有限元模拟主要进行了以下几方面的工作:
1.分析了土工格室的强度特性和加筋机理,得出土工格室加筋体可以增强地基约束力,提高地基承载力,调整不均匀沉降。
2.详细介绍了ANSYS面-面接触分析方法及生死单元的控制和使用,充分利用ANSYS有限元软件进行模型范围的确定。
3.利用ANSYS有限元软件对半填半挖路基进行了数值分析,分析了土工格室高度、格室模量以及垫层厚度等影响加筋效果的几个因素,所得出的结论对工程实践有一定的参考价值。
High-grade road construction is developing in unexampled speed along with the rapid andhealthy development of the national economy in recent years. The geological conditions of thearea that high-grade road passed through are infinitely different, so massive half-filled andhalf-dug treatments are needed in order to avoid uneven settlement of the roadbed. Unevensettlement of the roadbed is one of the common diseases of road, it may leads to relativelylargetransverse and lengthways cracking, even step and collapse, so affects the performance and theservice level of the road seriously, also restricts construction quality and long-term performanceofthehigh-graderoadprojectseriously.
Though there have been many methods to deal with uneven settlement of the roadbed, buttheeffectisunsatisfactory.Geocellisanewkindofgeosynthtics;ithasspatialconfigurationandpredominant performance. Geocell has been widely used in soft ground reinforcement of manykinds of civil engineering in recent years, and its reinforcement achieved good results. Severalmain works and results of this paper are listed as follows, which were studied by theoreticalanalysisandfiniteelementsimulation.
Firstly, the intensity characteristics and mechanism of embankment reinforced withgeosynthtics were analyzed; it can be concluded that the binding force of roadbed can bestrengthened by geocell, also the carrying capacity of roadbed can be improved and unevensettlementofroadbedcanbeadjustedbygeocell.
Secondly, surface to surface contact analysis method, together with the control and use ofthe birth and death unit in ansys were introduced in detail, the range of model is determined byANSYSfinitesoftware.
Thirdly, half-filled and half-dug road were analyzed by the ansys finite software. Thefactors which effect on road such as the thickness, modulus of geocell and the modulus ofgeocell mat were analyzed. Some useful results were obtained which can be referenced byprojectpractice.
虽然以前也有许多处理方法,但效果并不理想。土工格室是一种新型的土工合成材料,它工程性能优越,近年来被广泛应用于现代土木工程领域,并取得了良好的加固效果。本文通过理论分析和有限元模拟主要进行了以下几方面的工作:
1.分析了土工格室的强度特性和加筋机理,得出土工格室加筋体可以增强地基约束力,提高地基承载力,调整不均匀沉降。
2.详细介绍了ANSYS面-面接触分析方法及生死单元的控制和使用,充分利用ANSYS有限元软件进行模型范围的确定。
3.利用ANSYS有限元软件对半填半挖路基进行了数值分析,分析了土工格室高度、格室模量以及垫层厚度等影响加筋效果的几个因素,所得出的结论对工程实践有一定的参考价值。
High-grade road construction is developing in unexampled speed along with the rapid andhealthy development of the national economy in recent years. The geological conditions of thearea that high-grade road passed through are infinitely different, so massive half-filled andhalf-dug treatments are needed in order to avoid uneven settlement of the roadbed. Unevensettlement of the roadbed is one of the common diseases of road, it may leads to relativelylargetransverse and lengthways cracking, even step and collapse, so affects the performance and theservice level of the road seriously, also restricts construction quality and long-term performanceofthehigh-graderoadprojectseriously.
Though there have been many methods to deal with uneven settlement of the roadbed, buttheeffectisunsatisfactory.Geocellisanewkindofgeosynthtics;ithasspatialconfigurationandpredominant performance. Geocell has been widely used in soft ground reinforcement of manykinds of civil engineering in recent years, and its reinforcement achieved good results. Severalmain works and results of this paper are listed as follows, which were studied by theoreticalanalysisandfiniteelementsimulation.
Firstly, the intensity characteristics and mechanism of embankment reinforced withgeosynthtics were analyzed; it can be concluded that the binding force of roadbed can bestrengthened by geocell, also the carrying capacity of roadbed can be improved and unevensettlementofroadbedcanbeadjustedbygeocell.
Secondly, surface to surface contact analysis method, together with the control and use ofthe birth and death unit in ansys were introduced in detail, the range of model is determined byANSYSfinitesoftware.
Thirdly, half-filled and half-dug road were analyzed by the ansys finite software. Thefactors which effect on road such as the thickness, modulus of geocell and the modulus ofgeocell mat were analyzed. Some useful results were obtained which can be referenced byprojectpractice.
引文
[1]江明生,赵健.半填半挖路基加固技术探讨.中外公路,2005,25(3):26～28
[2]梁什森.保证土质公路路基压实度的探讨.广西交通科技,1996,21(3):20～23
[3]罗良繁,李永龙.半填半挖路基的施工.水运工程,2003,(8):69～70
[4]肖亚辉.深切高填及挖填交界、半填半挖路基施工.湖南交通科技,2002,28(2)26～29
[5]邓卫东,张兴强,陈波,等.路基不均匀沉降对沥青路面受力变形影响的有限元分析.中国公路学报,2004,17(1):12～15
[6]张兴强,陈波.路基不均匀沉降对沥青路面受力变形影响的有限元分析.中国港湾建设,2000,12(6):41～44
[7]曹映.公路路基施工应注意的质量问题.露大采煤技术,2002(5):19～21
[8]汤秀英.挖方路基过湿土处治技术的试验研究.重庆交通学院学报,2000,19(3):88～93
[9]谭继承.半挖半填高填方路基加固施工技术.山西建筑,2004,30(3):106～107
[10]宋继先,姜涛,牛树伟.处理高填方路基下沉的措施.黑龙江交通科技,2003,(6):19～20
[11]韩字乐.沟谷高填方路基施工质量的控制.广西交通科技,1997(增刊):31～32
[12]史志勇.挖方路基施工方法简介.建筑工程,2002,23(1):11～12
[13]高伏良.高填方路基自然沉降现象与应对措施.中南公路工程,2003,28(2):63～65
[14]邵建梁.高填方路基分层铺设土工格栅验算方法探讨.兰州石化职业技术学院学报,2003,3(2):20～23
[15]王晋明,李国华,孙林.高填方路基沉陷分析及防治措施.林业科技,2002,27(1):59～61
[16]刘以波,穆道贵,木根芳.古滑坡体复活的治理设计与施工.探矿工程(岩土钻掘工程),2004(1):38～40
[17]湖南省交通厅项目.潭邵高速公路岩溶与采空路、桥基础设计施工与质量控制方法研究,2003,12
[18]广西自治区交通厅项目.高填方路基施工与质量控制技术研究,2002,12,54～67
[19]公路土工合成材料应用技术规范(JTJ/T 019-98).北京:人民交通出版社.1999
[20]土工合成材料工程应用手册(第二版).北京:中国建筑工业出版社.2000
[21]曾锡庭,于志强. 土工格室及其应用. 中国港湾建设,2001(2):33～37
[22]北京燕山石油化工股份有限公司树脂应用研究所.土工格室及其工程性能简介.2000
[23]张荣,杨有海.土工格室处理盐渍土、湿地、沼泽地区软弱地基试验研究报告.铁道部结合工程的科研试验项目.1998
[24]雷胜友.加筋土强度的新认识.西北建筑工程学院学报(自然科学版),2000,17(3):10～13
[25]陈艳平.土工格室碎石垫层+碎石桩复合地基模型试验研究. 湖南大学硕士学位论文,2003
[26]岑洪辉.土工格室在公路建设中的应用.福建建材,2006,(3):60～62
[27]袁东进.土工格室加筋路堤机理及沉降计算方法的研究.河海大学硕士学位论文,2006
[28]Jewell A. The mechanics of reinforced embankments on soft soils. Geotextiles and Geomembranes,1988,7:237～273
[29]Rowe K. Stabilization of very soft soil using high strength geosynthetics: the role of finite elementanalyses.GeotextilesandGeomembranes, 1987,6:53～80
[30]袁斌.土工格室施工方法和质量检测标准.地基与基础,2006,20(1):63～64
[31]曾锡庭,于志强. 土工格室及其应用.2001,(2):35～37
[32]康国政.大型有限元程序的原理、结构与使用.西南交通大学出版社,2004
[33]龚曙光.ANSYS 工程应用实例解析.机械工业出版社,2003
[34]贺丽.塑料土工格栅加筋土挡土墙的应用研究.昆明理工大学硕士学位论文,2001
[35]习俊通,梅雪松,吴序堂.面向对象的接触问题的有限元分析.机械强度,1999,(3):39～41
[36]张文轩. 基于 ANSYS 的混合陶瓷球轴承接触分析与试验研究. 大津大学硕士学位论文,2004
[37]吕西林,金国芳等.钢筋混凝土结构非线性有限元理论与应用,上海同济大学出版社,1997
[38]周志刚,郑健龙.公路土工合成材料设计原理及工程应用.人民交通出版社.2001
[39]马卓军.格室加筋土强度特性和格室加筋砂土地基的研究.兰州铁道学院硕士论文.1998
[40]廖红建等.岩土工程数值分析.北京:机械工业出版社.2006
[41]Clough G W,Duncan J M. Finite element analysis of retaining wall behavior. Journal of Soil Meoh &FoundDieASCE,1971,97(2):1657～1674
[42]殷宗泽,朱泓 ,许国华.土与结构材料接触面的变形及数学模拟[J] .岩土工程学报,1994,16(3):14～22
[43]张冬霁,卢延浩.土与结构接触面模型的建立及其应用[J].岩土工程学报,1998,20( 6): 62～66
[2]梁什森.保证土质公路路基压实度的探讨.广西交通科技,1996,21(3):20～23
[3]罗良繁,李永龙.半填半挖路基的施工.水运工程,2003,(8):69～70
[4]肖亚辉.深切高填及挖填交界、半填半挖路基施工.湖南交通科技,2002,28(2)26～29
[5]邓卫东,张兴强,陈波,等.路基不均匀沉降对沥青路面受力变形影响的有限元分析.中国公路学报,2004,17(1):12～15
[6]张兴强,陈波.路基不均匀沉降对沥青路面受力变形影响的有限元分析.中国港湾建设,2000,12(6):41～44
[7]曹映.公路路基施工应注意的质量问题.露大采煤技术,2002(5):19～21
[8]汤秀英.挖方路基过湿土处治技术的试验研究.重庆交通学院学报,2000,19(3):88～93
[9]谭继承.半挖半填高填方路基加固施工技术.山西建筑,2004,30(3):106～107
[10]宋继先,姜涛,牛树伟.处理高填方路基下沉的措施.黑龙江交通科技,2003,(6):19～20
[11]韩字乐.沟谷高填方路基施工质量的控制.广西交通科技,1997(增刊):31～32
[12]史志勇.挖方路基施工方法简介.建筑工程,2002,23(1):11～12
[13]高伏良.高填方路基自然沉降现象与应对措施.中南公路工程,2003,28(2):63～65
[14]邵建梁.高填方路基分层铺设土工格栅验算方法探讨.兰州石化职业技术学院学报,2003,3(2):20～23
[15]王晋明,李国华,孙林.高填方路基沉陷分析及防治措施.林业科技,2002,27(1):59～61
[16]刘以波,穆道贵,木根芳.古滑坡体复活的治理设计与施工.探矿工程(岩土钻掘工程),2004(1):38～40
[17]湖南省交通厅项目.潭邵高速公路岩溶与采空路、桥基础设计施工与质量控制方法研究,2003,12
[18]广西自治区交通厅项目.高填方路基施工与质量控制技术研究,2002,12,54～67
[19]公路土工合成材料应用技术规范(JTJ/T 019-98).北京:人民交通出版社.1999
[20]土工合成材料工程应用手册(第二版).北京:中国建筑工业出版社.2000
[21]曾锡庭,于志强. 土工格室及其应用. 中国港湾建设,2001(2):33～37
[22]北京燕山石油化工股份有限公司树脂应用研究所.土工格室及其工程性能简介.2000
[23]张荣,杨有海.土工格室处理盐渍土、湿地、沼泽地区软弱地基试验研究报告.铁道部结合工程的科研试验项目.1998
[24]雷胜友.加筋土强度的新认识.西北建筑工程学院学报(自然科学版),2000,17(3):10～13
[25]陈艳平.土工格室碎石垫层+碎石桩复合地基模型试验研究. 湖南大学硕士学位论文,2003
[26]岑洪辉.土工格室在公路建设中的应用.福建建材,2006,(3):60～62
[27]袁东进.土工格室加筋路堤机理及沉降计算方法的研究.河海大学硕士学位论文,2006
[28]Jewell A. The mechanics of reinforced embankments on soft soils. Geotextiles and Geomembranes,1988,7:237～273
[29]Rowe K. Stabilization of very soft soil using high strength geosynthetics: the role of finite elementanalyses.GeotextilesandGeomembranes, 1987,6:53～80
[30]袁斌.土工格室施工方法和质量检测标准.地基与基础,2006,20(1):63～64
[31]曾锡庭,于志强. 土工格室及其应用.2001,(2):35～37
[32]康国政.大型有限元程序的原理、结构与使用.西南交通大学出版社,2004
[33]龚曙光.ANSYS 工程应用实例解析.机械工业出版社,2003
[34]贺丽.塑料土工格栅加筋土挡土墙的应用研究.昆明理工大学硕士学位论文,2001
[35]习俊通,梅雪松,吴序堂.面向对象的接触问题的有限元分析.机械强度,1999,(3):39～41
[36]张文轩. 基于 ANSYS 的混合陶瓷球轴承接触分析与试验研究. 大津大学硕士学位论文,2004
[37]吕西林,金国芳等.钢筋混凝土结构非线性有限元理论与应用,上海同济大学出版社,1997
[38]周志刚,郑健龙.公路土工合成材料设计原理及工程应用.人民交通出版社.2001
[39]马卓军.格室加筋土强度特性和格室加筋砂土地基的研究.兰州铁道学院硕士论文.1998
[40]廖红建等.岩土工程数值分析.北京:机械工业出版社.2006
[41]Clough G W,Duncan J M. Finite element analysis of retaining wall behavior. Journal of Soil Meoh &FoundDieASCE,1971,97(2):1657～1674
[42]殷宗泽,朱泓 ,许国华.土与结构材料接触面的变形及数学模拟[J] .岩土工程学报,1994,16(3):14～22
[43]张冬霁,卢延浩.土与结构接触面模型的建立及其应用[J].岩土工程学报,1998,20( 6): 62～66
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