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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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Journal ArticleDOI
TL;DR: In this article, the authors contribute to the seismic performance assessment of a historic brick masonry building by finding a strength reduction coefficient through the use of linear and nonlinear coefficients.
Abstract: This article aims at contributing to the seismic performance assessment of a historic brick masonry building by finding a strength reduction coefficient through the use of linear and nonlin...

17 citations

Journal ArticleDOI
TL;DR: In this article, the axial capacity of a steel model pile having a diameter of 30 mm was investigated under different loading rates for axial compression and uplift axial capacities.
Abstract: The strength of cohesive soils is affected by the rate at which the external load is applied. Bearing capacity of foundations is also affected by the rate of loading since it is a function of the shear strength of soils. In this study, the influence of loading rate on the axial capacity of piles in clay is experimentally investigated. Two series of model tests were carried out using a steel model pile having a diameter of 30 mm under different loading rates. The first group of tests was performed under axial compression loads, while the model pile was subjected to axial uplift loads in the second set of tests. In addition, consolidated undrained triaxial tests were performed under the same loading rates used in the axial capacity tests. Compressive and uplift axial capacities of the model pile were found to increase as the loading rate increases. The relationship between time to failure, and both the undrained shear strength of the clay and the axial capacity of the model pile can be represented by a straight line on a log-log plot.

17 citations

Journal ArticleDOI
TL;DR: In this article, two very simple and accurate equations are introduced that enable geotechnical engineers to determine the undrained ultimate bearing capacity of shallow strip foundations resting on two-layered clays.
Abstract: In this paper, two very simple and accurate equations are introduced that enable geotechnical engineers to determine the undrained ultimate bearing capacity of shallow strip foundations resting on two-layered clays. Results of the analyses show that in the case of weak-over-strong clay, usually general shear failure occurs, and in the case of strong-over-weak clay, the soil will most likely experience punching failure with a large amount of plastic settlement before it reaches its ultimate bearing capacity. This study applied the finite-difference method using a computer program to evaluate the undrained bearing capacity for all cases analyzed. The Mohr-Coulomb failure criterion was used for modeling the plastic behavior of soil. Simple equations are presented for cases of both strong-over-weak clay and weak-over-strong clay representing the bearing capacity of shallow foundations resting on two-layered clays. Results of this study are verified by acceptable statistical methods, and advantages of ...

17 citations

Journal ArticleDOI
Li Li1
TL;DR: In this article, the wick drain is introduced in the backfill within mine stopes to improve the drainage of conventional backfill design in backfilled stopes and numerical modeling is used to demonstrate the drainage improvement.
Abstract: Backfilling represents an environmentally friendly mining waste disposal technique. It is increasingly used in underground mines all over the world. However, its primary purpose remains to improve ground stability and to reduce ore dilution. Previous investigations have shown that fill drainage plays a key role in backfill and barricade design. With a poor drainage system in the backfilled stope, the required dimension of barricade, which is constructed at the base of the stope near the drift entrance, has to be increased. A poor backfill drainage system can also lead to a significant increase in drainage waiting time and further reduction in mining productivity. In this paper, the drainage of conventional backfill design in backfilled stopes is briefly reviewed. For the first time, the application of the wick drain is introduced in the backfill within mine stopes. The drainage improvement from the introduction of the wick drain is illustrated using numerical modeling.

17 citations

Journal ArticleDOI
TL;DR: In this article, a three-dimensional finite element approach was used to assess the lateral pile and pile group response subjected to pure lateral load, and a design equation was derived from predicted design curves to be used in the evaluation of lateral pile group action.
Abstract: A three-dimensional finite element approach was used to assess the lateral pile and pile group response subjected to pure lateral load. The study evaluated three pile group configurations (i.e. 2 × 1, 2 × 2 and 3 × 2 pile groups) with four values of pile spacing (i.e. 2D, 4D, 6D and 8D, where D is the pile diameter). The results of the influence of load intensities, group configuration, pile spacing are discussed in terms of response of load vs. lateral displacement, load vs. soil resistance and corresponding p–y curves. The improved plots can be used for laterally loaded pile design and also to produce the group action design p-multiplier curves and equations. As a result, design curves were developed and applied in the actual case studies and similar expected cases for assessment of pile group behavior using improved p-multiplier. A design equation was derived from predicted design curves to be used in the evaluation of the lateral pile group action. The equation was used with the previous results to predict the expected design curve take in the account different source of p-multiplier. It was found that the group interaction effect led to reduced lateral resistance for the pile in the group relative to that for the single pile. In addition, the present study was compatible with the results of previous results for the first and second trailing row and was less compatible with the result from the previous works in the case of piles in leading row.

17 citations