Soil arching is a phenomenon describing stress redistribution due to relative movement between adjoining portions. It commonly exists when soil interacts with structure elements, such as tunnels, retaining walls, buried structures, and piles in pile-supported embankments. A yielding or ultimate state of (i.e., the shear equal its strength) mostly assumed analytical models for arching. In reality, level shape slip surface depend on magnitude soil. this study, custom-made trapdoor test box was...

A geosynthetic-reinforced pile-supported (GRPS) embankment that consists of fill, geosynthetic, piles, and foundation soils is a complex soil–structure system. Its key load transfer mechanisms include soil arching tensioned membrane effects subsoil resistance. Type fill (cohesive or cohesionless) type pile (end-bearing floating) are expected to affect these mechanisms; however, their influence has not been well investigated. Six scaled model tests were conducted in this study investigate the...

Buried structures, such as pipes and culverts, are extensively used for transportation applications. The existence of these structures within the soil mass causes a redistribution stresses. stiffness buried structure relative to surrounding affects magnitude distribution vertical Higher stresses on may cause excessive deformations even failure structure. Expanded polystyrene (EPS) geofoam, lightweight material, has been increasingly above compressible inclusion reduce acting structures. This...

The purpose of this study is to assess effects two different simulation methods (i.e., interfaces with a single spring-slider system and double systems) for interactions between reinforcement the surrounding medium on performances geosynthetic-reinforced soil (GRS) structures when conducting numerical analyses. fundamental difference these number systems used connect nodes structural elements simulating geosynthetic points solid grids medium. Numerical results pull-out tests show that both...

A special device was designed, manufactured, and used to create a three-dimensional (3D) layout of rigid supports investigate the spatial tensile behavior geosynthetic reinforcement material over supports. polyester (PET) sheet simulate material. The results from model tests using this were evaluate distribution tension deformed shape simulated couple analytical solutions currently available in literature selected for comparison calculated deflections with measured data. This study found...

Internal erosion causes massive damage to the soil local and integral fabric with loss of fine particles. In order further compare mechanical consequence different internal scenarios, a series dissolution tests were designed simulate suffusion concentrated by using small amounts salt For both salt-free clean sand specimens erodible salt-sand specimens, drained triaxial compression combined bender element measurement performed evaluate degradation stiffness strength after erosion....

Abstract The tensile strength of geogrids and the shear reinforced soil interface are critical technical indicators for designing structures. This study developed a temperature-controlled apparatus to examine properties subjected freeze-thaw cycles within soil, effect temperature on behavior geogrid-soil interface. Eight four groups direct tests were conducted geogrids, respectively, under varying conditions. peak remained similar that non-freeze-thaw samples after experiencing freeze–thaw...

A wall of mechanically stabilized earth (MSE) with large concrete panel facing, reinforced polyester straps, is an emerging technology in the United States. To enable design this system through AASHTO's methodology, system's classification extensibility must be established. Therefore, a section such was instrumented as part newly constructed interchange on I-95 at Christiana, Delaware. The one several similar walls that allow access to bridges composing interchange. Monitoring included...

The total pullout resistance of geogrid in a soil includes two components: (1) the interface friction that takes place along longitudinal ribs and (2) passive against front transverse ribs. A series tests analyses were conducted to quantify contributions above components overall resistance. It was found mobilized is much higher than under same test conditions. Furthermore, values these are influenced by both displacement normal stress large extent.

High-energy impact rollers (IR) have been increasingly used for earthworks by compacting on-site soils. The IR applies high energy to the ground and densifies deeper soils than conventional plate-type compactors. A trial program was implemented on third runway of Shanghai Pudong International Airport in China validate performance technology. Field monitoring in-situ testing were undertaken during or after compaction. cone penetration data indicated that significant improvement soil...