GEOENGINEERING INVESTIGATION OF AN EROSION INDUCED HIGHWAY STRUCTURAL FAILURE ALONG IFON – BENIN HIGHWAY, SOUTHWESTERN NIGERIA

Earth Science Malaysia

article

Olumuyiwa Olusola Falowo¹  Adekunle Aliu¹ 

[1] Department of Civil Engineering Technology, Faculty of Engineering Technology

关键词: Bearing capacity;    Erosion;    Geologic section;    Highway;    Penetrative resistance;   

DOI  :  10.26480/esmy.01.2020.51.60

学科分类：地球科学(综合)

来源: Zibeline International

【 摘 要 】

35%), CBR values (<80%) recommended, angle of friction and cohesion are less than minimum standard of 30° and 50 Kpa respectively. The CPT revealed predominant sandy silt to clayey silt topsoil and clay substratum with compressive strength of 20 – 40 KN/m2. The water level is higher than 3 m, consequently far below the road foundation baseline. Findings showed that the upper 6 m of the failed segments has been seriously affected by erosion and flooding. Subsequently the process resulted into excessive settlement of the silt/clayey-subgrade soil underneath the pavement structure. This makes the highway to settle largely under traffic load. In addition, incessant heavy flooding around the embankment/shoulder of the highway might have induced the failure, leading to looseness, and less-cohesion of the layers which invariably reduces subgrade support and weakens various pavement layers.

【 授权许可】

CC BY