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華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (12): 96-101 DOI10.13245/j.hust.201217

欄目:土木工程
剛性擋土墻后設置EPS墊層的設計方法研究
鄭俊杰 , 景 丹 , 謝明星 , 邵安迪
華中科技大學土木與水利工程學院,湖北 武漢 430074
摘要 基于模型試驗和數值模擬對設置聚苯乙烯泡沫(EPS)墊層的剛性擋土墻受力特性進行分析,首先驗證了EPS墊層的減壓作用,其次討論了EPS墊層的彈性模量及厚度對EPS墊層減壓效果的影響,最后提出了剛性擋土墻后EPS墊層的設計方法.結果表明:在擋土墻后設置EPS墊層可降低擋土墻土壓力,EPS墊層的減壓效果隨墊層彈性模量的減小和厚度的增加而增加,提出的EPS墊層設計方法能夠同時滿足減壓效果、路面沉降和經濟性要求.
關鍵詞 擋土墻 ;土壓力 ;主動狀態 ;柔性墊層 ;模型試驗 ;數值模擬
Study on design scheme of installing EPS cushion behind the rigid retaining wall
ZHENG Junjie , JING Dan , XIE Mingxing , SHAO Andi
School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
Abstract Based on the model test and numerical simulation,the mechanical characteristics of the rigid retaining wall with expanded polystyrene (EPS) cushion behind the wall were studied.Firstly,the effect of EPS cushion on reducing earth pressure was verified.Secondly,the influences of elastic modulus and thickness of EPS cushion on the earth pressure reduction were discussed.Finally,a design method of EPS cushion behind rigid retaining wall was proposed.The results show that the earth pressure of retaining wall is reduced effectively by installing EPS cushion behind the retaining wall.The decompression effect of EPS cushion increases with the decrease of cushion elastic modulus and increase of thickness.The EPS cushion design method proposed can meet the requirements of pressure reduction effect,road settlement and economy.
Keywords retaining wall ; earth pressure ; active state ; flexible inclusion ; model test ; numerical simulation
基金資助國家重點研發計劃資助項目(2016YFC0800200);國家自然科學基金資助項目(51878313,51678267)

中圖分類號TU43
文獻標志碼A
文章編號1671-4512(2020)12-0096-06
參考文獻
[1] 胡慶國,陽軍生,黃生文.采用泡沫聚苯乙烯修筑的輕型橋臺路堤特性分析[J].中南大學學報(自然科學版),2006,37(2):408-413.
[2] TSUKAMOTO Y,ISHIHARA K,KON H,et al.Use of compressible expanded polystyrene blocks and geogrids for retaining wall structures[J].Soils and Foundations,2002,42(4):29-41.
[3] LAL B R R,PADADE A H,Mandal J N.Numerical simulation of EPS geofoam as compressible inclusions in fly ash backfill retaining walls[C]// Proc of Geo-Shanghai 2014.Shanghai:[s.n.],2004.DOI:10.1061/978078- 4413401.052.
[4] 鄭俊杰,呂思祺,曹文昭.剛柔復合抗滑樁受力與變形特性數值模擬分析[J].華中科技大學學報(自然科學版),2017,45(4):39-44.
[5] ERTUGRUL O L,TRANDAFIR A C.Reduction of lateral earth forces acting on rigid non-yielding retaining walls by EPS geofoam inclusions[J].Journal of Materials in Civil Engineering,2011,23(12):1711-1718.
[6] 潘詩婷,蘭鵬,劉小文,等.擋土墻填充緩沖層前后土壓力變化規律試驗研究[J].鐵道建筑,2017(6):98-100.
[7] HATAMI K,WITTHOEFT A F.A numerical study on the use of geofoam to increase the external stability of rein- forced soil walls[J].Geosynthetics International,2008,15(6):452-470.
[8] 彭文斌.FLAC3D實用教程[M].北京:機械工業出版社,2007.
[9] ERTUGRUL O L,TRANDAFIR A C.Lateral earth pressures on flexible cantilever retaining walls with deformable geofoam inclusions[J].Engineering Geology,2013,158:23-33.
[10] 東南大學,浙江大學,湖南大學,等.土力學[M].北京:中國建筑工業出版社,2010.
[11] 交通部公路科學研究院.JTG E40—2007公路土工試驗規程[S].北京:人民交通出版社,2007.
文獻來源
鄭俊杰, 景 丹, 謝明星, 邵安迪. 剛性擋土墻后設置EPS墊層的設計方法研究[J]. 華中科技大學學報(自然科學版), 2020, 48(12): 96-101
DOI:10.13245/j.hust.201217
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