Settlement patterns of mountainous half-filled and half-cut widened subgrade with retaining wall

作     者：FU Yong-guo JIANG Xin GU Han-yan QIU Yan-jun FU Yong-guo;JIANG Xin;GU Han-yan;QIU Yan-jun

作者机构：School of Civil EngineeringSouthwest Jiaotong UniversityChengdu 610031China MOE Key Laboratory of High-speed Railway EngineeringSouthwest Jiaotong UniversityChengdu 610031China Highway Engineering Key Laboratory of Sichuan ProvinceSouthwest Jiaotong UniversityChengdu 610031China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2021年第18卷第10期

页      面：2791-2802页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：supported by Sichuan Science and Technology Program (No.2019YFS0492) Key Laboratories Open Engineering Practice Program to Undergraduates of SWJTU (No.ZD2020010010) 

主　　题：Mountain road widening Balance weight retaining wall Subgrade settlement Pavement utilization Retaining wall inclination 

摘      要：The settlement of widened highway subgrade in mountainous area is not only affected by the interaction between new and existing subgrade, but also seriously restricted by the external retaining wall. Based on the practical engineering of half-filled and half-cut widened mountainous highway subgrade with external balance weight retaining wall(BWRW), a sophisticated finite element numerical model is established. The evolution law of subgrade settlement is revealed during the whole process of new subgrade filling and BWRW inclination after construction. The settlement component of subgrade is clarified considering whether the existing pavement continues to be used. The results show that the additional settlement caused by the BWRW inclination after construction cannot be ignored in the widening and reconstruction of mountainous highway subgrade. In addition, pursuant to the comprehensive design of subgrade and pavement, the component of subgrade settlement should be determined according to whether the existing pavement continues to be used, while considering the influence of BWRW inclination after construction. When the existing pavement continues to be used, the settlement of the existing subgrade is caused by the new subgrade filling and the BWRW inclination after construction. On the contrary, the settlement is only caused by the BWRW inclination after construction.