汶川地震对加筋土挡墙的影响分析
|
摘要
阐述了加筋土挡墙的结构和作用机理,利用有限元软件PLAXIS,结合震区公路调查资料,分析加筋土挡墙的受力变形状态。结果表明:在汶川地震作用下,加筋土挡墙下部应力最大,而上部位移最大。设计、施工中,对地震频发区的加筋土挡墙,可适当提高其顶部与底部的强度,或将加筋土挡墙的竖直墙面,改为略朝内倾的墙面,来减小地震对挡墙结构的影响。
The structure and mechanism of reinforced earth retaining wall are described in this paper.Then the deformation state of reinforced earth retaining wall is analyzed using finite element software PLAXIS combined with the survey data of highways in the affected area.The results show that the lower part of the reinforced earth retaining wall has the maximum stress and the upper part of the reinforced earth retaining wall has the maximum replacement under Wenchuan Earthquake.Therefore,in the future design and construction,the strength of the top and bottom of reinforced earth retaining wall can be improved properly,or the vertical gradient of the reinforced earth wall can be reduced in a reasonable way to reduce the impact of earthquakes on the wall.
The structure and mechanism of reinforced earth retaining wall are described in this paper.Then the deformation state of reinforced earth retaining wall is analyzed using finite element software PLAXIS combined with the survey data of highways in the affected area.The results show that the lower part of the reinforced earth retaining wall has the maximum stress and the upper part of the reinforced earth retaining wall has the maximum replacement under Wenchuan Earthquake.Therefore,in the future design and construction,the strength of the top and bottom of reinforced earth retaining wall can be improved properly,or the vertical gradient of the reinforced earth wall can be reduced in a reasonable way to reduce the impact of earthquakes on the wall.
引文
[1]苏骏,毕辉.双面加筋挡土墙结构特性分析[J].路基工程,2010(2):101-102.
[2]梅利芳,余天庆.高路堤双面直立互锚薄壁挡土墙模型试验研究[J].路基工程,2008(3):116-117.
[3]柏永生,于广云,李洪波.加筋土挡墙差异沉降数值模拟研究[J].路基工程,2008(1):71-72.
[4]李海光,周德培.新型支挡结构设计与工程实例[M].北京:人民交通出版社,2004:169-170.
[5]袁金秀,王道远.考虑地震荷载的挡土墙土压力计算方法的研究[J].路基工程,2010(3):187-189.
[6]刘华北.水平与竖向地震作用下土工格栅加筋土挡墙动力分析.岩土工程学报,2006,28(5).
[7]郑颖人,沈珠江,龚晓南.岩土塑性力学原理[M].北京:中国建筑工业出版社,2002.
[8]BRINKGREVE R B J,BROERE W.Plaxis V8专业版手册[K].代尔伏特技术大学,PLAXIS公司,荷兰.
[2]梅利芳,余天庆.高路堤双面直立互锚薄壁挡土墙模型试验研究[J].路基工程,2008(3):116-117.
[3]柏永生,于广云,李洪波.加筋土挡墙差异沉降数值模拟研究[J].路基工程,2008(1):71-72.
[4]李海光,周德培.新型支挡结构设计与工程实例[M].北京:人民交通出版社,2004:169-170.
[5]袁金秀,王道远.考虑地震荷载的挡土墙土压力计算方法的研究[J].路基工程,2010(3):187-189.
[6]刘华北.水平与竖向地震作用下土工格栅加筋土挡墙动力分析.岩土工程学报,2006,28(5).
[7]郑颖人,沈珠江,龚晓南.岩土塑性力学原理[M].北京:中国建筑工业出版社,2002.
[8]BRINKGREVE R B J,BROERE W.Plaxis V8专业版手册[K].代尔伏特技术大学,PLAXIS公司,荷兰.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心