GeoGauge is a portable instrument for rapid determination of the stiffness and modulus compacted soil, which can quickly, safely, nondestructively evaluate quality each layer. In order to deeply study effectiveness detection equipment used in soil-rock mixed subgrade, based on construction project Beijing-Qinhuangdao Expressway, influence water content compaction degree test results correlation...

Nomenclature a = stoichiometric coefficient av = surface-to-volume ratio C;, Cb; = surface and bulk concentration, vol % Da = Damkohler number Eif R = activation energy, K F = steady-state function h = heat-transfer coefficient K, = adsorption equilibrium coefficient k, k0 = reaction rate constant and preexponential factor, respectively kc = mass-transfer coefficient l = apparent reaction order...

This study introduced at first the background of numerous highway widening projects that have been developed in recent years in China. Using a large ground settlement simulator and a fiber Bragg grating (FBG) strain sensor network system, a large-scale model test, with a similarity ratio of 1:2, was performed to analyze the influence of differential settlement between new and old subgrades on p...

in many structures, the applied lateral loads are comparable with gravity loads. these types of piles which are subject to high lateral load are usually divided into two categories including long and short piles. the general methods to estimate lateral bearing capacity of short and long piles are based on ultimate bearing capacity and allowable horizontal displacement respectively. in the prese...

To facilitate pavement design, the new proposed mechanistic-empirical pavement design guide recommends the resilient modulus to characterize subgrade soil and its use for calculating pavement responses attributable to traffic and environmental loading. Although resilient modulus values could be determined through laboratory testing of actual subgrade soil samples, such testing would require sig...

One of the effective techniques to strengthen subgrade is boring and mixing technology, which based on immersion vertical elements – piles into subgrade. This method strengthening significantly affects stress state track superstructure. Two options placement are examined in this paper. To determine influence position superstructure, appropriate finite-element models were created. The fully refl...