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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 paper, the load transfer behavior along the shaft of the prebored and precast piles was investigated by pile loading tests, and the results showed two different load transfer behaviors; ductile and brittle behavior curves.
Abstract: In this study, the load-transfer behavior along the shaft of the prebored and precast piles was investigated by pile loading tests. Special attention was given to quantifying the skin frictions developed between the pile-soil interfaces of the 14 instrumented test piles. Based on this detailed field tests, the load settlement curves and axial load distributions of piles were obtained and the load-transfer curves (t-z curves) for the test piles were proposed. As such, it is found that the test results show two different load transfer behaviors; ductile and brittle behavior curves. The corresponding t-z curves are proposed based on the hyperbolicand sawtooth-shape, respectively. By validating the accuracy of the proposed curves, it is also found that the prediction results based on the proposed load-transfer curve are in good agreement with the general trends observed by the field loading tests.

10 citations

Journal ArticleDOI
TL;DR: In this paper, the breakout resistance of the inclined anchors in sand has been worked out using limit equilibrium approach, and a comparison of predicted values of break out resistance of anchors by the proposed analysis with the experimental values as reported by the other researchers showed reasonably good agreement.
Abstract: Inclined anchors are widely used in a variety of civil engineering problems to resist oblique loads, most relevant being in transmission towers and in rocks and dams for structural strengthening. In the present study, the breakout resistance of the inclined anchors in sand has been worked out using limit equilibrium approach. The breakout resistance has been calculated for different soil friction angles with varying relative depth ratio and anchor inclination. The break out factor increases continuously with the inclination of the anchor. A comparison of predicted values of break out resistance of anchors by the proposed analysis with the experimental values as reported by the other researchers showed reasonably good agreement.

10 citations

Journal ArticleDOI
TL;DR: In this paper, various reinforcement and strengthening details for the improvement of the punching-shear behavior of concrete footings were developed, including the additional placement of a longitudinal reinforcement around the column-footing connections, the inclination of the shear reinforcement, an additional cast of high-strength concrete, and an additional concrete cast with amorphous metallic fibers.

10 citations

Journal ArticleDOI
TL;DR: In this article, the mechanical responses of an offshore monopile foundation mounted in over-consolidated clay are calculated by employing a stochastic approach where a nonlinear p-y curve is incorporated with a finite element scheme.
Abstract: The mechanical responses of an offshore monopile foundation mounted in over-consolidated clay are calculated by employing a stochastic approach where a nonlinear p–y curve is incorporated with a finite element scheme. The random field theory is applied to represent a spatial variation for undrained shear strength of clay. Normal and Sobol sampling are employed to provide the asymptotic sampling method to generate the probability distribution of the foundation stiffnesses. Monte Carlo simulation is used as a benchmark. Asymptotic sampling accompanied with Sobol quasi random sampling demonstrates an efficient method for estimating the probability distribution of stiffnesses for the offshore monopile foundation.

10 citations


Cites background or methods from "Foundation analysis and design"

  • ...1974; Bowles 1988; API 1993). A standard procedure for the design of laterally loaded piles proposed in the relevant guidelines for offshore engineering is the p–y method, cf., e.g. (API 2000; DNV 2004). Numerical methods such as finite-element or finite-deference analyses are commonly used for analysing the pile response. Kim and Jeong (2011) applied the three-dimensional (3-D) finite-element method (FEM) to determine the load distribution and deflection...

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  • ...The p–y curves are the load-displacement relationships which represent the interaction between soil and pile via the springs (Reese et al. 1974; Bowles 1988; API 1993)....

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Journal ArticleDOI
TL;DR: In this paper, a relationship between the soil suction and water content was introduced using a digital monitor, accompanied by eight suction probes planted in CBR molds, which was used to predict the value of suction when conducting tests on models of the unsaturated soil.
Abstract: In this study, an attempt is made to investigate the load transfer in pile groups constructed in saturated and unsaturated soil using aluminum model piles of $$20\times 20$$ mm in cross section and 200 mm in length with six group configurations, single, $$2\times 1$$ , $$3\times 1$$ , $$2\times 2$$ , $$3\times 2$$ , and $$3\times 3$$ , groups in addition to pull-out test. The samples are prepared at three different soil properties: two models with the same degree of saturation and two with different dry unit weights and the third is unsaturated soil model with. A relationship between the soil suction and water content is introduced using a digital monitor, accompanied by eight suction probes planted in CBR molds. This relationship is used to predict the value of suction when conducting tests on models of the unsaturated soil. Further, the soil suction is measured using a filter paper method. Results of ultimate load capacity obtained from the load–displacement curves reveal an increase in the ultimate load with increasing the number of piles in the group for the same soil properties, and also an increase in the soil dry unit weight. Further, the results indicate an increase in pile capacity when the soil becomes in unsaturated state compared with saturated soil for the same pile group tested. On the other hand, the pull-out test gives a maximum load carrying capacity when the single pile tested was in saturated soil with high dry density, and minimum results are obtained when tested in unsaturated condition with the percentage of increase being about 463 and 34% for two saturated soils, compared with that for unsaturated soil.

10 citations