路基与半刚性基层间过渡层结构设计

doi:10.6040/j.issn.1672-3961.0.2019.099

山东大学学报 (工学版) ›› 2019, Vol. 49 ›› Issue (3): 80-85.doi: 10.6040/j.issn.1672-3961.0.2019.099

路基与半刚性基层间过渡层结构设计

王聪¹(),张璐²,弋晓明²

1. 交通运输部路网监测与应急处置中心, 北京 100029
2. 公路养护技术国家工程研究中心, 北京 100095

收稿日期:2019-03-05 出版日期:2019-06-20 发布日期:2019-06-27
作者简介:王聪(1983—)，男，山东济南人，工程师，博士，主要研究方向为公路路面病害机理. E-mail: by233@139.com
基金资助:
交通部科技资助项目(2006353337160)

Structural design of transitional layer between subgrade and semi-rigid base

Cong WANG¹(),Lu ZHANG²,Xiaoming YI²

1. Highway Monitoring and Response Center, Ministry of Transport of the P.R.C., Beijing 100029, China
2. National Engineering Research Center of Road Maintenance Technologies, Beijing 100095, China

Received:2019-03-05 Online:2019-06-20 Published:2019-06-27
Supported by:
交通部科技资助项目(2006353337160)

摘要/Abstract

摘要：

路基与半刚性基层间的过渡层缺乏针对性的设计方法,在分析过渡层设置机理的基础上,通过对不同模量和不同厚度情况下过渡层的补强作用进行分析,提出补强递增系数以及最佳补强理论,并结合我国典型半刚性基层路面结构提出过渡层设计的经济模量及厚度。结果表明,过渡层的模量和厚度越大,补强作用越明显,但其补强效率越低;当过渡层模量为200~500 MPa,且厚度不小于20 cm时,过渡层的补强效率较高。

关键词: 过渡层, 结构设计, 补强递增系数, 最佳补强理论, 经济模量

Abstract:

The special design of the transition layer between subgrade and semi-rigid base was scarce in the design system of pavement. The mechanism of the transition layer was studied, and then based on the analyses of reinforcing effect of transition layer under different modulus and thickness, the reinforcement incremental coefficient and optimal reinforcement model were proposed. Meanwhile, combined with typical semi-rigid base pavement structure, the economic modulus and thickness of transition layer were put forward. Results showed that the reinforcing effect was promoted as the increasement of the modulus and thickness of the transition layer, but the reinforcing efficiency was reduced. In order for higher reinforcing efficiency, the modulus of the transition layer should be 200~500 MPa, and the thickness should be not less than 20 cm.

Key words: the transition layer, structural design, reinforcement incremental coefficient, optimal reinforcement model, economic modulus

中图分类号:

U416

王聪,张璐,弋晓明. 路基与半刚性基层间过渡层结构设计[J]. 山东大学学报 (工学版), 2019, 49(3): 80-85.

Cong WANG,Lu ZHANG,Xiaoming YI. Structural design of transitional layer between subgrade and semi-rigid base[J]. Journal of Shandong University(Engineering Science), 2019, 49(3): 80-85.

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层位	模量/MPa	厚度/m	泊松比
面层	1 000	0.2	0.25
基层	1 200	0.2	0.20
路基	40		0.35

结构层	E/MPa	μ	厚度/cm
结构层	E/MPa	μ	结构1	结构2	结构3
上面层	1 400	0.25	5	5	5
中面层	1 200	0.25	5	5	5
下面层	1 000	0.25	5
上基层	1 500	0.20	16	16	16
下基层	1 500	0.20	16	16	16
底基层	800	0.20	18	18
路基	40	0.35

路基与半刚性基层间过渡层结构设计

Structural design of transitional layer between subgrade and semi-rigid base

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