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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: The piling framed retaining wall (PFRW) as mentioned in this paper is an innovative earth-retention system applicable for soils underlain by rock, which is ideal for applications where only limited right-of-way is available or adjacent structures limit the use of tieback anchors.
Abstract: The piling framed retaining wall (PFRW) is an innovative earth-retention system applicable for soils underlain by rock, which is ideal for applications where only limited right-of-way is available or adjacent structures limit the use of tieback anchors. Two PFRWs were successfully built along the I-40/I-75 corridor in Knoxville, Tennessee, with significant cost savings over traditional retaining wall designs. Although the walls were designed using conventional earth pressure theories, the soil pressures and forces acting on the wall face are not fully understood, and a rational design method has not been fully developed. Traditional theories of lateral earth pressure assume rigid translations or rotations as the fundamental deformation mode, when in reality more complex mechanisms of deformation and earth pressure distributions may exist. A series of FEM analyses was used to evaluate the soil stresses on the face of the wall for various configurations of wall geometry, backfill slopes, and soil pr...
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01 Jan 2018TL;DR: In this paper, the effect of raft thickness on the settlement of a raft footing was evaluated using both analytical and numerical modeling methods and the results showed that thickness of raft footing has no significant effect on the predicted settlement.
Abstract: In engineering practice, settlement of foundations are experimentally determined or numerically modelled based on conventional saturated soil mechanics principles. The study area, Oferekpe in Abakaliki LGA of Ebonyi State, South Eastern Region of Nigeria is characterised with sedimentary formations highly susceptible to compression under applied load. The study was aimed at evaluating raft footing settlement by both analytical and numerical modelling methods and determine the effect of raft thickness on settlement. Standard penetration test (SPT) data was used to correlate soil properties that were used together with laboratory results to obtain the input parameters used for the prediction of settlement. Four footing embedment depths of 1.5, 3.0, 4.5 and 6.0 m with applied foundation pressures of 50, 100, 200, 300, 400 and 500kN/m2 were considered using a raft footing dimension of 20 x 20 m2 at varying thickness of 0.5, 0.75 and 1.0 m. The numerical modelling finite element application package used was Plaxis 3D. For applied pressure of 100 kN/m2 and at footing embedment depths of 1.5, 3.0, 4.5 and 6.0 m, settlement values of (21.89, 11.51, 9.04 and 6.52), (19.70, 8.60, 6.41 and 4.39), (25.62, 14.88, 12.05 and 9.27) and (25.20, 11.59, 5.57 and 2.58) were respectively predicted by the elastic, semi-empirical, empirical and finite element methods. The elastic method of predicting foundation settlement proposed by Steinbrenner yielded a very close range results generally to those predicted by finite element method. It was generally observed that thickness of raft footing has no significant effect on the predicted settlement.
4 citations
Cites methods from "Foundation analysis and design"
...The standard penetration test (SPT) was conducted in accordance with ASTM D-1586-99 [20] and [21]....
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TL;DR: In this paper, two types of geological formations are analysed: residual soils (stationary origin) and mudflows (dynamic origin), and the index properties variability was evaluated for each geology, where mudflows are less variable in comparison with the residual soils.
Abstract: Determining soil properties variability in geotechnical engineering is one of the most important tasks in reliability-based designs (RBDs). However, these analyses have been carried without taking into account the influence of the geological origin on the different aspects that alter the soil properties variability. Therefore, two types of geological formations are analysed: residual soils (stationary origin) and mudflows (dynamic origin). First, the index properties variability was evaluated for each geology, where mudflows are less variable in comparison with the residual soils. It was confirmed that the correlations of the effective friction angle should not be used for high-plasticity and fine-grained soils; however, the shape characteristics of the probability density functions (PDFs) of both effective and total parameters depend on the geological origin. The undrained compressive strength (qu) analyses show that geology influences the shape characteristics of the PDF and is directly proportional to the (N1)60 PDF. From the results, mudflows have a qu PDF with a lognormal tendency, which is inferred to be due to the possible presence of rock fragments and randomness related to the soil9s formation. However, the residual soils, under the same state of weathering, tend to have a normal qu PDF, possibly owing to the stationary origin of these soils. Supplementary material: Datasets are available at https://doi.org/10.6084/m9.figshare.c.5420240
4 citations
02 Jan 2021
TL;DR: In this article, the authors make no warranty, explicit or implied, or make any representation with respect to the contents of any article will be complete or accurate or up to date.
Abstract: Disclaimer All the opinions and statements expressed in the papers are on the responsibility of author(s) and are not to be regarded as those of the journal of Research on Engineering Structures and Materials (RESM) organization or related parties. The publishers make no warranty, explicit or implied, or make any representation with respect to the contents of any article will be complete or accurate or up to date. The accuracy of any instructions, equations, or other information should be independently verified. The publisher and related parties shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with use of the information given in the journal or related means.
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Cites background from "Foundation analysis and design"
...0, then it is inferred that the sample is well graded [15,34,35]....
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TL;DR: In this article, an instrumented load test was performed as part of the foundation design for the Caminada Bay Bridge project in south Louisiana, where both static and dynamic load tests were performed.
Abstract: An instrumented pile load test was performed as part of the foundation design for the Caminada Bay Bridge project in south Louisiana. Both static and dynamic load tests were performed. The load-transfer curve of the test pile was obtained from strain measurements by using sister bar strain gauges at six locations along the pile shaft. The test pile resistance was determined by the Tomlinson method for cohesive soils and by the Nordlund method for cohesionless soils. The dynamic and the static load testing results indicated the test pile did not achieve the desired design resistance. The static analysis model was calibrated on the basis of observations of the pile load testing program. The design pile length was revised to benefit from the shallower scour depths for the revised pile design. The low resistance of the test pile resulted in the engineer's decision to use dynamic testing on the production piles to ensure adequate resistances. Taking advantage of the static load test of the instrumented test pi...
4 citations