Monitoring and stability analysis of roadbed & high slope prior to highway construction

• Published in: PloS one Vol. 19; no. 6; p. e0303860
• Main Authors: Zhao, Rengye, Cao, Shengliang, Ni, Bowen, Liu, Zhao
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 17-06-2024
• Subjects: Accuracy; Analysis; Construction accidents & safety; Deformation; Drainage; Earth Sciences; Engineering; Engineering and Technology; Environmental monitoring; Environmental Monitoring - methods; Gauges; Highway construction; Measuring instruments; Monitoring; Monitoring methods; Physical Sciences; Research and Analysis Methods; Road beds; Road construction; Road construction industry; Roads & highways; Slope stability; Slopes; Soil - chemistry; Soil settlement; Stability analysis; Topography; Transportation authorities
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0303860

Monitoring in highway projects is significant for the safety, efficiency and quality of construction. This paper proposes a detailed method for monitoring soft-soil roadbed and high-slope, and the layered settlement gauge and total station are employed to carry out experimental monitoring. The law and stability of soft-soil roadbed settlement and deformation under high-slope are further analyzed. The results show that the cumulative values of roadbed settlement and slope platform deformation in general both increase with the increase of monitoring time. However, near 180 days, an abnormal settlement phenomenon was monitored on both sides of the highway with a maximum value of 9.44 mm. This phenomenon was captured at gauge #1, #3, and #4 on observation stake 3, and exact oppositely, it was also observed at gauge #2 on observation stake 4. Moreover, unusual deformations of the high-slope platforms occurred over a period of 10 to 30 days, and these unusual settlements and deformations are indicative of the highway's instability. Therefore, the monitoring on soft-soil roadbed settlement and high-slope deformation can provide reference for highway construction.