Cyclic loading always results in great damage to the pore structure and fractal characteristics of soft soil. Scanning electron microscope (SEM) can help collect data describe microstructure This paper conducted a series SEM tests interpret effect consolidation confining pressure, circulating dynamic stress ratios overconsolidation ratio on soil’s micro-pore characteristics. The demonstrate tha...

chemical flooding, especially alkaline/surfactant/polymer flooding, is of increasing interest due to the world increasing oil demand. this work shows the aspects of using alkaline/surfactant/polymer as an enhanced oil recovery method in the porous media having a high dead-end pore frequency with various dead-end pore parameters (such as opening, depth, aspect ratio, and orientation). using glas...

Previous studies have revealed that prefabricated vertical drains (PVDs) are effective in stabilizing the soft subgrade soils under traffic-induced cyclic loads. A consolidation model of clays loading incorporating both radial and drainages, nonlinear variation compressibility permeability is presented this paper. The prediction matches well with result from a large-scale triaxial test conducte...

Three different liquefaction mitigation techniques for an earthen embankment resting on saturated loose cohesionless soil have been compared in the present study as densification of foundation soil, stone column mitigation, and hybrid pile-stone mitigation. Numerical modelling has done using finite element assuming plane strain condition. Liquefaction behaviour modelled effective stress-based e...

Solutions for the stress and pore pressure p are derived due to sudden introduction of a plane strain shear dislocation on a leaky plane in a linear poroelastic, fluid-infiltrated solid. For a leaky plane, y 1⁄4 0, the fluid mass flux is proportional to the difference in pore pressure across the plane requiring that Dp 1⁄4 R@p=@y, where R is a constant resistance. For R 1⁄4 0 and R ! 1, the exp...

The utilization of the lining type in pressure tunnels is highly dependent on the geological and hydraulic conditions. There are two types of lining, namely concrete and steel lining but steel lining is one of the most expensive arrangements. To decrease the length of steel lining in these tunnels, the concrete lining, which prevents water seepage from the surrounding rock mass, is the appropri...

Heavy haul rail transport certainly demands a more robust and stable railway foundation as the subgrade soils are prone to instability at higher axle loads. The current paper presents series of cyclic triaxial tests investigate response different with varying stress ratio (CSR). Theoretical models based on Modified Cam Clay (MCC) model extended predict experimental results. Two hypotheses propo...

As the composite pile, precast concrete piles reinforced with cement-treated soil (PCCS) is formed by driving cement (PC) pile into deep mixing (DM) column, which has been successfully and widely utilized to support buildings embankments over soft soil. To increase spacing give full play economic merits of PCCS, a reinforcement scheme, involves combined use rigid flexible columns, employing pen...

The aim of this study was to investigate the effect of high pressure CO(2) on the crosslinking of elastin-based polymers and the characteristics of the fabricated hydrogels. A hydrogel was fabricated by chemically crosslinking alpha-elastin with glutaraldehyde at high pressure CO(2). The effects of pressure, reaction time, and crosslinker concentration on the characteristics of the fabricated h...