چکیده مقاله
Construction on soft, clayey soils is often challenged by low bearing capacity and excessive settlement Stone column reinforcement, which replaces weak soil with compacted granular columns, has proven to be an effective, economical, and eco friendly method for ground improvement This study experimentally investigates how groups of stone columns affect the shear strength and bearing capacity of loose clayey beds CL and CH clays Unreinforced clay samples and those improved with a triangular group of seven sand columns 30 mm diameter were tested in a large scale direct shear apparatus The tests Fast method, constant normal stresses of 50, 100, and 200 kPa, 20% shear displacement provided equivalent Mohr Coulomb shear parameters Sample construction varied by soil type, number of compaction layers within each column 1 3 layers , and loading orientation apex up vs base up in triangular arrangement Results show that reinforcing loose clay with compacted columns significantly increases shear strength and ultimate bearing capacity Increasing the number of sand compaction layers within the columns yields more uniform density and further boosts strength Moreover, columns in a stiffer CL clay mobilize resistance at lower strain than in a softer CH clay The vertical loading direction also matters: loading from the apex side produces higher strength than from the base side Overall, CL series samples exhibited greater relative improvements than CH series, reflecting that stone columns are more effective in stiffer clays These findings underline the importance of column construction quality layering and compaction in determining the enhanced bearing capacity of the reinforced clay
کلیدواژهها
نویسندگان
Karim Bahari Amineh
Ph D Student, Dept of Civil Engineering, Islamic Azad University, Roudehen Branch, Iran
Seyyed Mohammad Ali Sadreddini
Assistant Professor, Dept of Civil Engineering, Islamic Azad University, Eslamshahr Branch, Iran
Mohammad Hadi Alizadeh Elizei
Assistant Professor, Dept of Civil Engineering, Islamic Azad University, Roudehen Branch, Iran
شیوه ارجاع
Bahari Amineh, Karim and Sadreddini, Seyyed Mohammad Ali and Elizei, Mohammad Hadi Alizadeh,1404,Laboratory Study of Bearing Capacity of Loose Clay Reinforced with Group Stone Columns,Third International Conference on applied researches in civil engineering, architecture and urban planning
ارائهشده در
مجموعه مقالات سومین کنفرانس بین المللی پژوهش های کاربردی در مهندسی عمران، معماری و شهرسازی30 آبان 1404