Sand production is a crucial geotechnical issue for safe and efficient gas recovery from natural hydrate (NGH) reservoirs. Although the same method of depressurization was chosen trials in Nankai Trough Northern South China Sea, their sand behaviors differed greatly due to skeleton diversity clayey-silt which resulted different control characteristics. In this study, we conducted experiments co...

Unsaturated soil shear strength is a significant topic in geotechnical engineering. The measurement of unsaturated properties such as and matric suction could be costly, hard, time-consuming, often impractical to obtain. purpose this research propose new model for predict the by using degree saturation directly because water easy More specifically, study focused on Bishop’s theory van Genuchten...

The paper analyzes the problem of initial compaction a non-cohesive soil sample on example dry silty sand samples. Two different methodologies were used: I) dynamic - using split Hopkinson pressure bar and II) vibration vibrating shaker. A better result process was obtained for with an value 0.5 (small difference in both methods comparable results). also includes numerical analysis calibration ...

Using the Nanjing Dinghuaimen Yangtze River Tunnel project as a case study, we proposed method to reuse excavated silty-fine sand by adjusting proportion of waste replace commercial sand. This would address issue recycling significant amount generated when slurry shield passes through stratum. Moreover, have evaluated grout indicators such density, fluidity, consistency, bleeding rate, volumetr...

An attractive approach to reduce the carbon dioxide footprint of deep soil mixing (DSM) is replace Portland cement-based binders by geopolymers based on metakaolin. Safe design requires a good understanding mechanical and hydraulic properties improved ground, but very little known about metakaolin–soil mixtures. For instance, shrinkage during curing significant issue for metakaolin-based concre...

The article considers the possibility of using wastepaper sludge ash (WSA) as a soil reinforcement material for construction layers road wear. Loamy sand, sandy loam, silty clay were chosen soils strengthening. maximum density skeleton at optimum humidity was established by method Proctor. Wastepaper and Portland cement grade 400 used separately Six compositions strengthened each type investiga...

The clogging of infiltration basins is the main problem affecting proper functioning groundwater artificial recharge systems. In this study, several parameters have been varied to understand their impacts on water infiltration. experimental results show that effect initial humidity significant for less porous material such as silty soil (Hamri) and sand. air bubbles are also an important factor...