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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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01 Jan 2007
TL;DR: In this paper, the authors reviewed the recent developments in advanced stress-strain and strength testing of geomaterials, together with engineering application of the test results and showed two case histories with reference to excavation work in urban area, and the failure of reinforced wall due to heavy rainfalls.
Abstract: Advanced laboratory stress-strain and strength testing of geomaterials is a need for geotechnical engineering practice. In this keynote paper, recent developments in advanced stress-strain and strength testing of geomaterials, together with engineering application of the test results are reviewed by showing two case histories with reference to excavation work in urban area, and the failure of reinforced wall due to heavy rainfalls.
1 citations
01 Jun 2021
TL;DR: In this paper, the authors investigated the physical and geomechanical characteristics needed to assess the geotechnical suitability of the subsurface at Ataqa industrial zone, Suez, Egypt for constructing some industerial facilities.
Abstract: Our investigations are aimed to calculate the physical and geomechanical characteristics needed to assess the geotechnical suitability of the subsurface at Ataqa industrial zone, Suez, Egypt for constructing some industerial facilities To accomplish our target, four seismic profiles are conducted using the refraction technique to estimate the primary seismic wave velocity as well as four profiles using the method of "Multichannel Analysis of Surface Waves" for estimating the velocity of shear waves The stage of processing and interpretation are performed through using the "SeisImager/2D" Software The results clarify the existence of two layers to a depth of 18 m The top layer ranges in thickness between 2 and 4m and has a primary wave velocity ranging between 924 and 1247 m/s and a shear wave velocity ranging between 530 and 745 m/s On the other hand, the second layer possesses an average primary velocity ranging between 1277 and 1573 m/s and a shear wave velocity ranging between 684 and 853 m/s The measured velocities are utilized to calculate many physical and geomechanical properties of the earth materials comprising the two layers in our study area The integration between all these parameters proves the suitability of both layers for erecting the proposed constructions
1 citations
TL;DR: In this paper, the authors used geotechnical information obtained from a subway project in Qom city, Iran to evaluate deformation and strength parameters of soils for various projects, including subway projects.
Abstract: A pressuremeter test (PMT) is one of the in situ tests, which is used to evaluate deformation and strength parameters of soils for various projects, including subway projects. The limit pressure (PL) and undrained shear strength (Su) are the key parameters that are obtained directly and indirectly from the pressuremeter testing results. This research was carried out using geotechnical information obtained from a subway project in Qom city, Iran. Based on 44 PMT and uniaxial tests on very stiff to hard saturated clayey soils, a linear empirical equation between Su − PL and Su − PL* = (PL − σH) with R2 = 0.68 was proposed and it was found that σH had an insignificant effect on the proposed relationship. The effect of physical properties of soil, including plastic index (PI), liquid limit (LL), and water content (ω), was evaluated, and a multivariate equation was proposed between them. A comparison between the equations obtained in this research and those proposed by other researchers reveals that the empirical relationships between Su and PL are associated with the consistency of soils; the stiffer the soil is, the slope of relationship between Su and PL is less.
1 citations
TL;DR: In this paper, the authors studied the topology optimization for jet-grout distribution as a structural material beneath a foundation under static and dynamic loadings, and the results showed that the jet grout mainly tends to concentrate near the edges of the foundation.
1 citations
TL;DR: In this article, a modified mechanistic model is presented to study the pullout responses of geosynthetic reinforced soil walls, and the analysis is performed using a linear-elastic subgrade based on Pasternak model and the resulting second order differential equations in nondimensionalized form are solved applying the finite difference method with the proper boundary conditions.
Abstract: This paper presents a modified mechanistic model to study the pullout responses of geosynthetic reinforced soil walls. The analysis considers the kinematics of the failure, the stiffness and the deformation compatibility of the reinforcement. An updated discretization technique is proposed to account for the deformation compatibility of the reinforcement. A simple iteration scheme is suggested to compute the active length of the reinforcement, which is essential for the before pullout response of an extensible reinforcement. The analysis is performed using a linear-elastic subgrade based on Pasternak model and the resulting second order differential equations in nondimensionalized form are solved applying the finite difference method with the proper boundary conditions. A case study is conducted for a series of full-scale instrumented reinforced soil walls to validate the present analysis. The reinforcement load at each level was back-predicted using the present analysis, and the results are compared with the measured data, AASHTO simplified method and K-stiffness method. The back-analysis demonstrates that the present analysis can be readily integrated with the existing method of analysis (AASHTO) and gives a better prediction of the reinforcement load. A parametric study is also conducted to quantify, predominantly the effect of reinforcement stiffness on the pullout response. The pullout is found to be the prevalent mode of failure for higher reinforcement stiffness; however, for a lower stiffness, the strain may exceed the allowable limit causing a tension failure before the pullout.
1 citations