Research on Static and Dynamic Loading Performance of Geosynthetic Reinforced and Pile-Supported Embankment

Abstract

Geosynthetic reinforced and pile-supported (GRPS) provide an economic and effective solution for embankments. To investigate the load-bearing mechanism of the GRPS embankment in loess, experimental and numerical studies under static and dynamic loading are carried out. The characteristics of soil arch effect and tensile membrane effect of GPRS embankment under static and dynamic loading are revealed by analyzing pile–soil stress ratio, tension of geogrid, and stress distribution of pile. The test results show that the pile–soil stress ratio under dynamic loading is reduced by 2.3 compared with static loading. In comparison to static load, the soil arching effect is attenuated under dynamic load, and the stronger the static load soil arching effect, the greater the degree of weakening under dynamic load. In addition, under dynamic loading, the tensioned membrane effect is still effective, but its enhancement is not as pronounced as under static loading. Furthermore, by using the finite element software, the numerical model is developed and validated with the experimental results. The parameter analysis of the load-bearing performance of the GRPS embankment is accomplished using the finite element model as well.

Settlement and stress analysis in stabilized slab- and pile-supported embankment based on double-equal settlement plane

“…Rapid and effective improvement techniques have been proposed earlier to improve the mechanical properties and settlement characteristics (Wijerathna et al ., 2017; Yapage et al ., 2015; Zhao et al ., 2019; Ding et al ., 2020) of such soils. In the last few decades, a reasonably expensive improvement technique using geosynthetic-reinforcement combined with pile-supported (GRPS) embankments was proposed in construction practice (Chai et al ., 2015; Fagundes et al ., 2017; Fons et al ., 2019; Liu et al ., 2020; Pham et al ., 2020; Wang et al ., 2019; Lang et al ., 2022; Deng et al ., 2023; Guo et al ., 2023a, b). The geosynthetic-reinforced traditional platform layer made of gravel and sand is a critical part of GRPS embankments (Liu et al ., 2020; Bhasi and Rajagopal, 2015; Han and Gabr, 2002; Rui et al ., 2019; Xu et al ., 2016; Ikbarieh et al ., 2023).…”