Keywords
Reconstruction and expansion
Roadbed widening
Settlement control
Submitted : 2024-02-26
Accepted : 2024-03-12
Published : 2024-03-27
Abstract
This article analyzes the differential settlement of new and old roadbeds after widening and its characteristics based on a highway reconstruction and expansion project case study. The research proposes a subgrade settlement control standard that states that the maximum differential settlement value should be less than 5 cm when the embankment fill height exceeds 20 m. Similarly, the maximum differential settlement value should be less than 10 cm when the embankment fill height does not exceed 20 m. The findings of the study can provide a useful reference for the design of roadbed widening in highway reconstruction and expansion projects.
References
Zhang YQ, Shi Q, Zhang WM, et al., 2023, Research on Settlement Control Standards for Roadbed Widening in Mountainous Highway Reconstruction and Expansion. China Standardization, 2023(24): 204–208.
Hong L, 2023, Research on Differential Settlement Factors and Control Technology of Fill Roadbed in Highway Reconstruction and Expansion. Transportation World, 2023(24): 44–46.
Li TF, 2023, 400 km/h High-Speed Railway Subgrade-Post-Foundation Settlement Deformation Mapping Relationship and Control Standards. Railway Construction, 63(08): 107–112.
Jia DM, 2023, Analysis of Settlement Patterns of Roadbed during Reconstruction and Expansion of Highways. Shanxi Transportation Science and Technology, 2023(01): 44–46.
Zhao Y, 2022, Application of Differential Settlement Control Technology in the Roadbed Widening Section during Highway Reconstruction and Expansion. Transportation Manager World, 2022(34): 41–43.
Tang L, 2022, Discussion on the Allowable Differential Settlement Control Standards for New and Old Subgrades of Expanded Highways. Transportation World, 2022(30): 144–146.
Zhang KL, 2022, Application of Differential Settlement Control Technology in the Roadbed Widening Section during Highway Reconstruction and Expansion. Transportation World, 2022(25): 58–60.
He WN, Li JC, Zhang X, et al., 2022, Research on Differential Settlement Control Standards and Classification of Old and New Roadbeds. Jiangxi Building Materials, 2022(07): 40–41 + 44.
Du XF, 2022, Standards and Technologies for Settlement Control of Ultra-Shallow Tunnels under Highway Subgrade. Heilongjiang Transportation Science and Technology, 45(05): 147–149.
Chen ZM, Zhou F, Wen Y, et al., 2022, Research on Settlement Control Standards and Technology of Ultra-Shallow Tunnels under High-Speed Roadbeds. Highway Engineering, 47(04): 61–69 + 116.
Luo QF, 2021, Discussion on the Subgrade Settlement Control Method of Widening the Soft Soil Section of the Reconstructed and Expanded Expressway in Jiangsu Province. Brick and Tile, 2021(03): 80–81.
Min XY, Chen B, Yang H, et al., 2021, Research on the Differential Settlement Law and Control Technology of New and Old Roadbeds in Highway Reconstruction and Expansion. Construction Technology Development, 48(03): 159¬–160.
Hou J, 2020, Research on Differential Settlement Control Standards for the Reconstruction, Expansion, and Widening of the Beijing-Shanghai Expressway based on the Fluid-Solid Coupling Model. Northern Communications, 2020(09): 70–73.
Liu JM, 2019, Monitoring and Analysis of Uneven Settlement of Highway Roadbed Widening. Shanxi Transportation Science and Technology, 2019(02): 15–18.