Load Bearing Capacity of Cohesive-Frictional Soils Reinforced with Full-Wraparound Geotextiles: Experimental and Numerical Investigation

Applied Sciences

Arul Arulrajah¹  Menglim Hoy²  Suksun Horpibulsuk²  Gampanart Sukmak³  Patimapon Sukmak³ 

[1] Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne, VIC 3122, Australia;School of Civil Engineering, Undergraduate Program in Civil and Infrastructure Engineering, Center of Excellence in Innovation for Sustainable Infrastructure Development, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand;School of Engineering and Technology, Center of Excellence in Sustainable Disaster Management, Walailak University, 222 Thaiburi, Thasala District, Nakhon Si Thammarat 80161, Thailand;

关键词: ground improvement;    earth reinforcement;    geotextiles;    numerical analysis;   

DOI  :  10.3390/app11072973

来源: DOAJ

【 摘 要 】

This research investigated the effects of types of cohesive-frictional soil and geotextile reinforcement configurations on the bearing capacity of reinforced soil foundation (RSF) structures, via laboratory test and numerical simulation. The four reinforcement configurations studied for the RSF included: (i) horizontal planar form of geotextile, (ii) full-wraparound ends of geotextile, (iii) full-wraparound ends of geotextile with filled-in sand, and (iv) full-wraparound ends of geotextile with filled-in sand and sand backfill. The foundation soils studied were mixtures of fine sand and sodium bentonite at replacement ratios of 0, 20, 40, 60, 80, and 100% by dry weight of sand to have various values of plasticity index (PI). The numerical analysis of RSF structures was performed using PLAXIS 2D software. Several factors were studied, which included: embedment depth of the top reinforcement layer (U), width of horizontal planar form of the reinforcement (W), and spacing between geotextile reinforcement layers (H). Number of reinforcement layers (N) was varied to determine the optimum parameters of U/B, W/B, H/B, and N, where B is the footing width. The most effective improvement technique was found for the full wraparound ends of geotextile with filled-in sand and sand backfill. The outcome of this research will provide a preliminary guideline in a design of RSF structure with different ground soils and other RSF structures with different geosynthetic types.

【 授权许可】

Unknown