A study on load transfer mechanism of Geosynthetic Reinforcement Pile-Supported

초록

Recently, Geosynthetic Reinforcement Pile-Supported (GRPS) have been widely utilized as a practical method for track construction and operation on the weakly soft ground. The mechanism of GRPS system is that soil arching effect and tensile stress of geosynthetic could restrain the settlement of soft ground and enhance pile efficiency by transferring vertical load acting on soft ground to piles. In this study, a series of full-scale static and cyclic loading tests have been conducted in soft ground and embankment, while changing the condition such as embankment height ratio (h/(s-d)), loading condition, geosynthetics strength and installation method. A number of earth pressure gauge, load cell have installed in the soft ground, pile cap and geosynthetics, in order to measure vertical pressure and load on those of materials. In addition, strain gauges have been also attached on geosynthetics to obtain strain data during embankment, static and dynamic loading. Based on test results, load transfer mechanism of GRPS system by soil arching effect and geosynthetics tensile stress have analyzed quantitatively, furthermore, the ultimate embankment height have also suggested.