[1]戴敬敬.考虑筋土界面相互作用的加筋路基变形特性分析[J].华南地震,2021,41(01):153-160.[doi:10.13512/j.hndz.2021.01.21]
　DAI Jingjing.Analysis of Deformation Characteristics of Reinforced Subgrade Considering the Interaction of Reinforced-soil Interface[J].,2021,41(01):153-160.[doi:10.13512/j.hndz.2021.01.21]
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考虑筋土界面相互作用的加筋路基变形特性分析()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
41
期数:
2021年01期
页码:
153-160
栏目:
土木工程防震减灾
出版日期:
2021-03-20

文章信息/Info

Title:
Analysis of Deformation Characteristics of Reinforced Subgrade Considering the Interaction of Reinforced-soil Interface
文章编号:
1001-8662(2021)01-00153-08
作者:
戴敬敬
上海公路桥梁(集团)有限公司， 上海 200433
Author(s):
DAI Jingjing
Shanghai Road and Bridge(Group)Co.，Ltd.，Shanghai 200433，China
关键词:
加筋路基; 虚功方程; 摩阻系数; 水平荷载; 路面挠度
Keywords:
Reinforced subgrade; Virtual work equation; Friction coefficient; Horizontal load; Pavement deflection
分类号:
U416.01
DOI:
10.13512/j.hndz.2021.01.21
文献标志码:
A
摘要:
为了分析考虑筋土界面相互作用的加筋路基结构的变形特性，分别采用Timoshenko梁模型、Pasternak剪切层模型以及筋土界面摩尔库伦准则对加筋路基中路面结构、基层以及界面相互作用特性进行模拟。根据各层之间的相互作用，得到加筋体的虚功方程。同时，将计算模型退化为Winker地基模型，对比验证了模型的合理性。最后采用分析模型研究了筋材模量及界面摩阻系数、基层参数以及水平荷载的影响。结果表明:在基层中铺设土工合成材料可以有效减小路面沉降，提升基层的抗剪能力，并降低路面水平荷载的影响；提高筋材与基层间摩阻系数、筋材的抗拉模量以及基层的极限剪力可以有效提高加筋效果；同时路面处的水平荷载会引起路面结构挠度的变化，对筋材界面的摩擦阻力影响较大。
Abstract:
In order to analyze the deformation characteristics of reinforced subgrade structures considering the interaction of reinforced-soil interface， the Timoshenko beam model， Pasternak shear layer model and the Mohr Coulomb criterion of reinforced soil interface were used to analyze the pavement， subbase and interface characteristic. According to the relationship of pavement， subbase reinforcement and foundation， the virtual work equation was obtained. Then the calculation model in this paper was degenerated into a Winker foundation model， and the correctness of the calculation model is verified by comparison. The effects of reinforcement and interface parameters， subbase layer parameters and horizontal load were analyzed. The results showed that the inclusion of geosynthetics in the subbase could effectively reduce pavement settlement， strengthen the shear resistance. With the increasing tensile strength of geosynthetic， the coefficient of friction and the ultimate shear strength of subbase， the effect of reinforcement and the ability to resist the deformation increased. Horizontal load will result in change on deflection of pavement， which has great effect on the frictions between geosynthetic and subbase.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-01-10
基金项目:国家自然科学基金资助项目(51678352)
作者简介:戴敬敬(1984- )，男，工程师，主要从事市政高架、道路改扩建，雨水管、污水管道施工总承包管理工作。E-mail:157719507@qq.com
更新日期/Last Update: 2021-03-20