地震作用下返包式加筋土挡墙数值模拟

doi:10.13278/j.cnki.jjuese.20200313

吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (5): 1416-1426.doi: 10.13278/j.cnki.jjuese.20200313

地震作用下返包式加筋土挡墙数值模拟

蔡晓光^1,2,3, 徐洪路¹, 李思汉⁴, 张少秋¹

1. 防灾科技学院地质工程学院, 河北三河 065201;
2. 河北省地震灾害防御与风险评价重点实验室, 河北三河 065201;
3. 中国地震局建筑物破坏机理与防御重点实验室, 河北三河 065201;
4. 中国地震局工程力学研究所/中国地震局地震工程与工程振动重点实验室, 哈尔滨 150080

收稿日期:2020-12-20 出版日期:2021-09-26 发布日期:2021-09-29
通讯作者: 徐洪路(1996-),男,硕士研究生,主要从事岩土工程抗震研究,E-mail:xuhonglu@163.com E-mail:xuhonglu@163.com
作者简介:蔡晓光(1979-),男,教授,硕士生导师,主要从事岩土工程抗震研究,E-mail:caixiaoguang123@163.com
基金资助:
国家自然科学基金项目（51778144）；河北省在读研究生创新能力培养资助项目（CXZZSS2020150）；地震科技星火计划项目（XH204402）

Numerical Simulation of Reinforced Soil Retaining Wall with Wrapped Face Under Seismic Effects

Cai Xiaoguang^1,2,3, Xu Honglu¹, Li Sihan⁴, Zhang Shaoqiu¹

1. College of Geological Engineering, Institute of Disaster Prevention, Sanhe 065201, Hebei, China;
2. Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment, Sanhe 065201, Hebei, China;
3. Key Laboratory of Building Collapse Mechanism and Disaster Prevention, China Earthquake Administration, Sanhe 065201, Hebei, China;
4. Institute of Engineering Mechanics/Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin 150080, China

Received:2020-12-20 Online:2021-09-26 Published:2021-09-29
Supported by:
Supported by the National Natural Science Foundation of China (51778144), Hebei Province Postgraduate Students' Innovative Ability Training Grant Program (CXZZSS2020150) and the Earthquake Science and Technology Starfire Project (XH204402)

摘要/Abstract

摘要： 返包式加筋土挡墙是一种柔性面板挡墙，因其良好的地基适应性及地震安全性广泛应用于交通、市政和水利等诸多领域中。本文使用FLAC^3D数值模拟程序对返包式加筋土挡墙墙面坡度、土工袋填料及筋材强度进行了抗震性能研究。研究结果表明：当墙面坡度<1∶0.30时，墙后侧向土压力分布均匀且数值较小，近似于一条竖向直线；当墙面坡度≥1∶0.30时，墙后侧向土压力分布规律一致且符合朗肯土压力理论。因此，当墙面坡度<1∶0.30时，加筋土结构应按加筋土边坡进行设计；当墙面坡度≥1∶0.30时，加筋土结构应按加筋土挡墙进行设计。土工袋填料种类对返包式加筋土挡墙地震动力响应几乎没有影响，在抗震设计时可不考虑其对挡墙的影响。筋材强度越高，返包式加筋土挡墙抗震性能越好，但筋材强度与挡墙的抗震性能不成正比例，由于加筋土结构的"加筋作用饱和"现象，大幅度提升筋材强度并不会使挡墙的抗震性能得到大幅度提升；因此，工程中在保证筋材强度达标的前提下需注意经济性。

关键词: 返包式加筋土挡墙, 数值模拟, 抗震性能, 墙面坡度, 填料类型, 筋材强度

Abstract: Reinforced soil retaining wall with wrapped face is a kind of flexible panel retaining wall, which is widely used in many fields such as transportation, municipal, and water conservancy because of its good foundation adaptability and seismic safety. In this paper, the seismic performance of the reinforced soil retaining wall with wrapped face is investigated by using FLAC^3D numerical simulation program to study the slope of the wall, geotechnical bag filler, and reinforcement strength. The results show that when the slope of the wall is less than 1:0.30, the distribution of soil pressure behind the wall is uniform and small, approximately vertical straight line; When the slope of the wall is greater than or equal to 1:0.30, the distribution of soil pressure behind the wall is consistent and in accordance with Rankine earth pressure theory. Therefore, when the wall slope is less than 1:0.30, the structure should be designed according to the reinforced soil slope; When the wall slope is greater than or equal to 1:0.30, the reinforced soil structure should be designed according to the reinforced soil retaining wall. The type of geotechnical bag filler has almost no effect on the seismic dynamic response of the reinforced soil retaining wall with wrapped face, so its effect on the retaining wall can be disregarded in the seismic design. The higher the strength of reinforcement, the better the seismic performance of the reinforced soil retaining wall, however the strength of reinforcement is not proportional to the seismic performance of the retaining wall, so, to greatly increase the strength of reinforcement will not greatly improve the seismic performance of the retaining wall due to the phenomenon of "saturation of reinforcement effect" of reinforced soil structure; Therefore, it is necessary to pay attention to the economical efficiency of the project under the premise that the strength of reinforcement meets the standard.

Key words: reinforced soil retaining wall with wrapped face, numerical simulation, seismic performance, wall slope, geobag filler, strength of geogrid

中图分类号:

蔡晓光, 徐洪路, 李思汉, 张少秋. 地震作用下返包式加筋土挡墙数值模拟[J]. 吉林大学学报(地球科学版), 2021, 51(5): 1416-1426.

Cai Xiaoguang, Xu Honglu, Li Sihan, Zhang Shaoqiu. Numerical Simulation of Reinforced Soil Retaining Wall with Wrapped Face Under Seismic Effects[J]. Journal of Jilin University(Earth Science Edition), 2021, 51(5): 1416-1426.

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地震作用下返包式加筋土挡墙数值模拟

Numerical Simulation of Reinforced Soil Retaining Wall with Wrapped Face Under Seismic Effects

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