Dynamic response of prestressed wrap-reinforced earth retaining walls
LU Liang1,2,3, ZHANG Jun-jun2,5, MA Shu-wen2,4, WANG Zong-jian6, CHEN Zhi-xiong1,2,4
1. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 3. Fundamental Research Funds for the Central Universities (Chang'an University), Xi'an 710000, China; 4. National Joint Engineering Research Center for Prevention and Control of Environmental Geological Hazards in the TGR Area (Chongqing University), Chongqing 400045, China; 5. The IT Electronics Eleventh Design & Research Institute Scientific and Technological Engineering Corporation Limited, Chengdu 610066, China; 6. College of River & Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
Abstract：Under the action of earthquakes, as a flexible structure, the wrap-reinforced retaining wall structure can not be used normally because of large lateral deformation or local damage. The prestressed wrap-reinforced earth retaining wall, in which prestress is applied in geosynthetics in order that it is pilled in advance, is proposed. In order to improve the design theory of prestressed reinforced earth retaining walls, takeing the pseudo-dynamic method and the additional stress method as the theoretical basis, the reinforced earth retaining wall with prestressing back-pack is investigated. Based on the existing theory of lateral dynamic earth pressure and lateral displacement of reinforced earth retaining wall, a set of theoretical formulas for calculating the lateral dynamic earth pressure and lateral displacement of prestressed wrap-reinforced earth retaining walls are proposed. The accuracy and reliability of the method are verified by shaking table model tests. The proposed method has the advantages of simple calculation, wide application, and can be used to calculate the lateral dynamic earth pressure and lateral displacement of retaining walls, and it is of a certain significance of guiding and reference for the design theory of prestressed wrap-reinforced earth retaining walls.
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