Author(s)

Kaitong Li ¹, Jiangfeng Lv ¹, Zhuoming Chen ¹

Affiliation(s)

¹ Municipal Engineering Branch Inst, Broadvision Engineering Consultants Co., LTD, Kunming, China

Corresponding Author

Kaitong Li

ABSTRACT

With the rapid development of the economy and the sustained growth of vehicle retention, road traffic in our country is facing great pressure. The expressway, as an important traffic trunk, its traffic capacity has become a bottleneck in regional economic development. In order to solve this problem, highway reconstruction and expansion project came into being, among which the construction technology of splicing and widening roadbed has become the key. This paper focuses on the construction technology of spliced and widened roadbed in the construction process of highway reconstruction and expansion engineering, aiming at improving the traffic capacity and carrying capacity of highways to meet the needs of modern traffic. In the highway reconstruction and expansion project, the construction of splicing and widening roadbed faces many challenges, such as uneven settlement of new and old roadbed, poor roadbed stability, and great difficulty in construction. In order to solve these problems, this paper first analyzes the construction preparation before the reconstruction and expansion, and provides scientific basis for the subsequent construction. Then, the construction technology of spliced and widened roadbed is deeply discussed. In the subgrade splicing construction process, this paper focuses on the subgrade splicing method and the technical points of the splicing surface treatment: in the subgrade splicing process, the methods of low fill section treatment, soil subgrade treatment, subgrade filling and compaction are put forward; In the treatment of splicing surface, the construction is carried out through elevation adjustment, joint treatment and rolling. In addition, this paper also discusses the problem of settlement control in the construction process, by observing and calculating the residual settlement, timely measures are taken to adjust the construction scheme, to ensure that the construction of the road or road bed is carried out within the allowed settlement range. At the same time, according to the special geological conditions such as soft soil foundation, the specific technical measures are put forward to ensure that the post-construction settlement of the newly widened roadbed can meet the design requirements. The research in this paper not only improves the technical level of the roadbed construction, but also provides strong support for the smooth advancement of our country's road reconstruction and expansion project.

KEYWORDS

Highway reconstruction and expansion; New and old roadbed splicing; Construction technique

CITE THIS PAPER

Kaitong Li, Jiangfeng Lv, Zhuoming Chen, Research on the Construction Technology of Spliced and Widened Roadbed in the Construction Process of Highway Reconstruction and Expansion Project. Frontiers in Traffic and Transportation Engineering (2024) Vol. 4: 162-170. DOI: http://dx.doi.org/10.23977/ftte.2024.040119.

REFERENCES

[1] Qiqi L ,Yuhe Z ,Chenjun Y , et al.Evaluation of Differential Settlement of Subgrade for Highway-Widening Projects[J]. Sustainability,2023,15(4):2950.
[2] Zhao L ,Liu L .Analysis of Roadbed Splicing at Hub Interchanges[J].Journal of World Architecture,2024,8(1):24-30.
[3] Jiarong L ,Kai W ,Shiping C , et al.Influence of Subgrade Splicing Mode and Width on Differential Settlement of Pavement Subgrade[J].IOP Conference Series: Earth and Environmental Science,2021,719(3).
[4] Zhiqiang Q ,Yun S ,Lei J .Reinforcement Technology for Soft Soil Roadbed in the Widened Section of Expressway Expansion[J].Journal of World Architecture,2024,8(2):25-30. 
[5] Xiong B ,Yang G ,Wang X .Settlement Analysis of Widening Subgrade in the Highway Considering Technology Parameter of Composite Foundation[J].International Journal of Earth Sciences and Engineering,2016,9(4):1429-1433.
[6] Liu, Qianhui,Zhang, Zhengxin.Analysis of bidirectional geogrid based on pavement structure under roadbed stability [J]. IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association,2018,30(06):455-460.
[7] Wei G Y ,Zhou F W ,Li Y Y .Management Research on Treatment Measures for Differential Settlement of Tianjin-Binhai Expressway's Widened Subgrade[J].Applied Mechanics and Materials,2014,2973(505-506):28-34.
[8] Zhao Q ,Hu C ,Xia G , et al.Research of Highway Bridge Settlement Monitoring Technology based on Machine Vision [J]. Journal of Research in Science and Engineering,2024,6(7):29-32.
[9] Wang, Meng,Cai, Guo-Jun,Liu, Wen-Liang, et al.Evaluation of engineering characteristics of new and old soft soil foundation based on advanced CPTU data[J].Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering, 2019, 41:81-84.
[10] Rui Z ,Zhengnan L ,Jianlong Z , et al.Utilisation of expansive soils as highway embankment materials in humid environments[J].International Journal of Pavement Engineering,2022,23(7):2176-2190.

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