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Foundation analysis and design
01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
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TL;DR: In this paper, a finite-element code was developed in MATLAB to model three-dimensional soil-pile-structure systems and frequency dependent Kelvin elements (spring and dashpots) were used to model the radiation boundary conditions.
Abstract: Nonlinearity of the soil medium plays a very important role on the seismic behavior of soil-pile-structure interaction. The problem of soil-pile-structure interaction is further complicated when the piles are embedded in liquefiable soil medium. A finite-element code was developed in MATLAB to model three-dimensional soil-pile-structure systems. Frequency dependent Kelvin elements (spring and dashpots) were used to model the radiation boundary conditions. A work-hardening plastic cap model was used for constitutive modeling of the soil medium. The pore pressure generation for liquefaction was incorporated by a two-parameter volume change model reported in the literature. In this paper, a 2×2 pile group in liquefiable soil is considered and a parametric study is conducted to investigate its seismic behavior. The effects of loading intensity and stiffness of the soil on the seismic behaviour of the soil-pile system are investigated, considering nonlinearity and liquefaction of the soil medium for a wide ran...
80 citations
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TL;DR: In this paper, the optimal location and number of geogrid layers have not been established for train, highway and runway unbound aggregate behavior using geogrids is investigated.
80 citations
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TL;DR: In this article, bagasse ash (BA), a type of agricultural waste from the sugar industry, was used as an admixture to improve the unconfined compressive strength, chemical composition and microstructural properties of soft clay.
79 citations
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TL;DR: In this article, a modified set of bearing capacity factors based on soil properties, footing geometry, and slope configuration is proposed for shallow foundations placed on slopes of native c′-ϕ′ soils in which the bearing capacity can be the critical design constraint.
Abstract: Conventional bearing capacity analyses for shallow foundations placed on slopes use a modified set of bearing capacity factors based on soil properties, footing geometry, and slope configuration, but are restricted to purely cohesionless or purely cohesive soils. This approach is adequate for establishing bearing capacity on engineered fills with controlled foundation properties, yet does not adequately address design for bearing capacity on soils that have both cohesion and internal frictional resistance—a common scenario for native soils. This role becomes increasingly important in design for mechanically stabilized earth walls, which are often placed on slopes of native c′-ϕ′ soils in which the bearing capacity can often be the critical design constraint. Prior approaches to bearing capacity on horizontal ground for c′-ϕ′ soils utilize principles of limited state plasticity in their formulation, yet the most commonly applied bearing capacity approaches on slopes use semiempirical formulations t...
79 citations
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TL;DR: In this article, a study was conducted to determine the dynamic properties of compacted clayey soils subjected to low amplitude vibration using a fast and simple ultrasonic pulse transmission method, and the effects of soil type, compaction conditions, and degree of saturation on the dynamic response of the soils were investigated.
Abstract: A study was conducted to determine the dynamic properties of compacted clayey soils subjected to low amplitude vibration. A fast and simple ultrasonic pulse transmission method was used. Tests were conducted on three clayey soils with low to high plasticity compacted using standard and modified Proctor effort over a range of water contents. The samples were allowed to dry after compaction and P-wave velocity, S-wave velocity, Poisson's ratio, and shear modulus were determined. The effects of soil type, compaction conditions, and degree of saturation on the dynamic response of the soils were investigated. The elastic wave velocities and the dynamic shear modulus increased as the soil plasticity decreased. The velocities and the modulus increased and the Poisson's ratio decreased as the degree of saturation decreased due to drying. Generally, the velocities and moduli increased significantly at the early stages of drying with the changes becoming more gradual as drying progressed. Variations were high for soils compacted with low energy and high water content. The shear moduli of the soils were also estimated using a common empirical equation. Suction values obtained for the test soils in a different study were used as effective stresses in the estimation. The estimated shear moduli agreed well with the measured values.
79 citations