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Abstract

By combining the study process and conclusion of the interchange scheme of the Lugao hub as an important node of G4216 Jinyang-Ningnan Expressway Project, this paper discussed the ideas and methods of selecting the hub interchange shape under complex terrains and high functional requirements. It aimed to provide certain references for the design of hub interchange schemes in special Y-shaped terrain conditions. The Lugao hub interchange location is deeply cut by the Jinsha River and its branches, with narrow valley bottoms, extremely steep cross slopes, and harsh engineering construction conditions. Meanwhile, in the limited space, the specific requirements of the highways for hub conversion and landing function should be satisfied. In addition, there are more controlled factors. In the main line where the bridge tunnel ratio is as high as 92.4%, the hub interchange is extremely limited in the open sections. The ramp connection location is controlled by the super major bridge of the main line (continuous rigid frame). The elevation of the connected highway is 40 m higher than the intersection of the two projects, while that of the ground level intersection is 62 m lower than the intersection. This paper systematically reviewed and summarized the experience of systematically grasping control factors, selecting reasonable schemes appropriately, and continuously optimizing the schemes in complex terrain conditions from multiple perspectives and throughout the entire process. Finally, new ideas are provided for the design of hub interchange schemes in similar terrain conditions.

Publication Date

9-14-2023

DOI

10.14048/j.issn.1671-2579.2023.04.049

First Page

303

Last Page

308

Submission Date

March 2025

Reference

[1]四川省交通勘察设计研究院有限公司.G4216线金阳至宁段段高速公路JN1标段施工图设计[Z]，2020. Sichuan Provincial Transportation Survey and Design Research Institute Co.Ltd.Construction drawing design of JN1 bidding section of highway Jinyang-Ningduan section of G4216 line [Z], 2020. [2]中交第一公路勘察设计研究院有限公司,四川省交通勘察设计研究院有限公司.G7611线昭通（川滇界）至西昌段高速公路A1标段初步设计[Z]，2019. CCCC First Highway Survey and Design and Research Institute Co Ltd,Sichuan Provincial Transportation Survey and Design and Research Institute Co Ltd.Preliminary design of the A1 bidding section of Zhaotong (Sichuan-Yunnan Boundary) to Xichang section of highway of G7611 line [Z], 2019. [3] 梁海文. 特定复杂条件下枢纽互通式立交方案研究[J]. 中外公路, 2018, 38(4): 333-336. LIANG Haiwen. Research on the scheme of hub interchange under specific complex conditions[J]. Journal of China & Foreign Highway, 2018, 38(4): 333-336. [4] 谢琪. 福州市二环路白湖亭立交工程方案研究[J]. 中外公路, 2017, 37(1): 286-291. XIE Qi.Fuzhou second ring road baihu ting interchange project programme study[J]. Journal of China & Foreign Highway, 2017, 37(1): 286-291. [5] 周艳丽. 复杂条件下互通式立交方案研究[J]. 中外公路, 2010, 30(2): 264-267. ZHOU Yanli. Study of interchange options under complex conditions[J]. Journal of China & Foreign Highway, 2010, 30(2): 264-267. [6] 中交第一公路勘察设计研究院有限公司. 公路路线设计规范: JTG D20—2017[S]. 北京: 人民交通出版社, 2018. CCCC First Highway Consultants Co., Ltd..Design specification for highway alignment: JTG D20—2017[S]. Beijing: China Communications Press, 2018. [7] 中国公路工程咨询集团有限公司. 公路立体交叉设计细则: JTG/T D21—2014[S]. 北京: 人民交通出版社, 2014. China Highway Engineering Consulting corporation Guidelines for design of highway grade-separated intersections: JTG/T D21—2014[S]. Beijing: China Communications Press, 2014.

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