scholarly journals Bearing Capacity of the Working Platform with Kinematic Method

2015 ◽  
Vol 37 (1) ◽  
pp. 3-8
Author(s):  
Katarzyna Białek ◽  
Lech Bałachowski
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Soft Soil ◽  
Failure Mechanisms ◽  
Cohesionless Soils ◽  
Angle Of Internal Friction ◽  
Kinematic Method ◽  
Margin Of Safety ◽  
Effective Angle ◽  
Different Thickness

Abstract Bearing capacity of the working platform for heavy tracks was analysed using Distinct Layout Optimization (DLO) method. The platform layer constructed from cohesionless soils is resting on weak cohesive subgrade. Different thickness of the platform, its effective angle of internal friction and undrained shear strength of the soft soil were taken into consideration. Kinematic method permits different failure mechanisms to be analyzed. Margin of safety for a given load and subsoil conditions was determined using two approaches: increasing the load or decreasing the shear strength up to failure. The results were compared with solution proposed in BRE recommendations.

The settlement and bearing capacity of very large foundations on strong soils: 1996 R.M. Hardy keynote address

1998 ◽  
Vol 35 (1) ◽  
pp. 131-145 ◽  
Author(s):  
Jack I Clark
Keyword(s):  
Bearing Capacity ◽  
Data Base ◽  
Tall Buildings ◽  
Friction Angle ◽  
Geologic History ◽  
Cohesionless Soils ◽  
In Situ Tests ◽  
Angle Of Internal Friction ◽  
Undisturbed Samples ◽  
Order Of Magnitude

Strong soils are not typically problem soils, and hence their behaviour has not been extensively studied. Strong soils are best defined on the basis of their geologic history, but for this paper they can be roughly defined as cohesive soils with an N value of about 15 or over and cohesionless soils with N values over 30. Settlement of tall buildings on strong soils has always been of interest. The means of estimating settlement of the large foundations or pile foundations associated with these structures varies but is generally understood to be predominantly elastic. Although predictions of settlement based on laboratory tests or in situ tests may vary as much as an order of magnitude, there now exists a reasonable data base which suggests that large buildings will settle similar amounts regardless of the size or bearing pressure of the foundations or, for that matter, the type of foundations. No data base exists for quantifying the maximum bearing pressure that will be tolerated by large foundations without failure. The angle of internal friction is known to be critical and to decrease with increasing pressure. It is difficult to measure the undisturbed strength of strong soils, since undisturbed samples are very difficult to secure. Centrifuge model tests of large foundations of different shapes confirm that the bearing capacity factor N gamma decreases with increased size of footing, but the decrease of N gamma may not be accounted for entirely by the friction angle change with pressure. Selection of a friction angle to determine the peak capacity of very large foundations must be done very carefully and with a great deal of judgement, since it cannot be accurately measured.Key words: settlement, bearing capacity, foundation behaviour.

scholarly journals Effect of GGC (Geoform Granule Column) on Acceleration of Settlement in Soft Soil

2020 ◽  
Vol 14 (3) ◽  
pp. 194-203
Author(s):  
Adelina Maulidya F ◽  
◽  
Yulvi Zaika ◽  
As’ad Munawir ◽  
◽  
...  
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Triaxial Test ◽  
Soft Soil ◽  
Strength Parameter ◽  
Test Results ◽  
Consolidation Process ◽  
Soft Soils ◽  
Short Period ◽  
Effect Test

Soft soils has low bearing capacity and high compressibility which is potentially damage the structure laid above it. An effort is taken to use EPS beads to form GGC will accelerate of consolidation process. The purpose of study to investigate the influence of density and diameters of GGC against strength and settlement. Triaxial test are conducted to identify the shear strength parameter after consolidation test were done. The equivalence value of permeability (kve) is calculated using the Chai Method (2001) by considering smear effect. Test results showed that the settlement of soft soil in 90 degree consolidation reached in short period of time upon for smallest density and largest diameter of GCC.

Undrained Uniaxial Capacities of Suction Bucket Foundations in Rows

2018 ◽  
Author(s):  
Zhong Xiao ◽  
Yumin Lu ◽  
Ying Liu
Keyword(s):  
Finite Element ◽  
Shear Strength ◽  
Soft Soil ◽  
Failure Mechanisms ◽  
Soft Clay ◽  
Finite Element Models ◽  
Simple Construction ◽  
Bucket Foundation ◽  
Spacing Ratio ◽  
Soil Shear Strength

Suction bucket foundations in rows, sunk by self-weight and passive suction, can be used as footings of breakwater, trestle bridge, offshore cofferdam and other structures, and they have a fine application prospect on soft soil for their advantages of good bearing capacities, simple construction, low investment, being reusable and so forth. A large number of finite-element models for suction bucket foundations in undrained soft clay were established to investigate uniaxial capacities of suction bucket foundations, and the effects of foundations spacing ratio, embedment ratio and soil shear strength were studied. The results show that foundations spacing ratio has certain effect on the uniaxial capacities of a suction bucket foundation but is less influential than other factors; embedment ratio and soil shear strengths have more influence on the uniaxial bearing capacities and failure mechanisms of bucket foundation. Based on these results, simplified formulae are proposed to predict uniaxial capacities of suction bucket foundations in rows for designers to use directly.

Bearing capacity of anisotropic cohesionless soils

1978 ◽  
Vol 15 (4) ◽  
pp. 592-595 ◽  
Author(s):  
G. G. Meyerhof
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Shallow Foundations ◽  
Test Results ◽  
Cohesionless Soils ◽  
Inclined Load ◽  
Load Tests

Previous test results of the anisotropic shear strength of cohesionless soils are reviewed. The theory of the ultimate bearing capacity of shallow foundations on homogeneous isotropic soils is extended to anisotropic cohesionless soils. The proposed method of analysis is compared with the results of some load tests on anisotropic sand. An extension of this method to foundations under inclined load is briefly discussed.

scholarly journals Effect of several patterns of floating stone columns on the bearing capacity and porewater pressure in saturated soft soil

2021 ◽  
Author(s):  
Mahdi Karkush ◽  
◽  
Anwar Jabbar ◽  
Keyword(s):  
Bearing Capacity ◽  
Soft Soil ◽  
Ultimate Bearing Capacity ◽  
Geotechnical Properties ◽  
Stone Columns ◽  
Stone Column ◽  
Angle Of Internal Friction ◽  
Design Requirements ◽  
The Common ◽  
Porewater Pressure

One of the common geotechnical problems is the construction on soft soil and the improvement of its geotechnical properties to meet the design requirements. A stone column is one of the well-known techniques used to improve the geotechnical properties of soft soils. Sometimes thick layers of soft soil imposed the designer to use floating stone columns for improvement of such soil; in this case, the designer will be lost the end bearing of the stone column. In this study, the effects of several patterns of floating stone columns distribution under footing on the bearing capacity of soil and the distribution of excess porewater pressure are investigated. The soft soil used in this study has a very low undrained shear strength (cu) of 5.5 kPa and improved by several patterns of stone columns (single, two linear, triangular, square, and quadrilateral). The stone column has a length of 180 mm and a diameter of 30 mm. The material of the stone column is poorly graded sand has an angle of internal friction (48.5°) at a relative density of 65%. The results indicated a significant increase in the ultimate bearing capacity of soft soil when treated with floating stone columns despite the small ratio of area replacement and reducing the excess porewater pressure and settlement. Also, the ultimate bearing capacity of soil calculated from experimental work is compared with the corresponding values obtained from the proposed equations in the previous studies to evaluate the validity of using such equations.

scholarly journals Effect of Urease Enzyme on Shear Strength of Clay Shale

2018 ◽  
Vol 7 (4.36) ◽  
pp. 424 ◽  
Author(s):  
Maxwel Joseph Henri Nainggolan ◽  
Wiwik Rahayu ◽  
Puspita Lisdiyanti
Keyword(s):  
Shear Strength ◽  
Bearing Capacity ◽  
Triaxial Test ◽  
Clay Soil ◽  
Soil Strength ◽  
Clay Shale ◽  
Strength Performance ◽  
Enzyme Mixture ◽  
Urease Enzyme

In recent years, utilization of biotechnology in geotechnical field has rapidly grown. One of the biotechnologies being utilized is urease enzyme, a stabilization material by bio-cementation method studied in this research.  Urease enzyme is manually mixed with additional 10% of clay soil to clay shale. The objective of mixing it is to increase the bearing capacity of the clay shale. Consolidated undrained triaxial test was performed for testing the soil strength performance for samples that had undergone curing for 2, 4, and 6 weeks. The results indicated that the sample stiffens, proved by the increase of shear strength from consolidated undrained triaxial test. The shear strength value produced by the variation of the urease enzyme mixture + 10% the clay is higher than that of without the original clay shale.  

scholarly journals Prediction of Effects of Geogrid Reinforced Granular Fill on the Behaviour of Static Liquefaction

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
A. Hemalatha ◽  
N. Mahendran ◽  
G. Ganesh Prabhu
Keyword(s):  
Bearing Capacity ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Large Size ◽  
Static Liquefaction ◽  
Granular Fill ◽  
Size Dimension ◽  
Subgrade Modulus ◽  
Different Thickness

The experimental investigation on the effects of granular fill and geogrid reinforced granular fill on the behaviour of the static liquefaction potential of the subsoil is reported in this study. A series of plate load test were carried out with different thickness of the granular fill, number of geogrid layers, and size/dimension of the footing. The test results were presented in terms of bearing capacity and subgrade modulus for the settlement ofδ10,δ15, andδ20. The experimental results revealed that the introduction of granular fill significantly increases the bearing capacity and effectively control the settlement behaviour of the footing. The introduction of geogrid in granular fill enhanced the Percentage of Control in Settlement and Bearing Capacity Ratio by a maximum of 328.54% and 203.41%, respectively. The introduction of geogrid in granular fill interrupts the failure zone of the granular fill and enhances the subgrade modulus of the footing by a maximum of 255.55%; in addition subgrade modulus of the footing was increased with an increase in the number of geogrid layers. Based on the test results it is suggested that the footing with large size has beneficial improvement on the reinforced granular fill.

Prediction of shear strength of soft soil using machine learning methods

CATENA ◽  
2018 ◽  
Vol 166 ◽  
pp. 181-191 ◽  
Author(s):  
Binh Thai Pham ◽  
Le Hoang Son ◽  
Tuan-Anh Hoang ◽  
Duc-Manh Nguyen ◽  
Dieu Tien Bui
Keyword(s):  
Machine Learning ◽  
Shear Strength ◽  
Soft Soil ◽  
Learning Methods ◽  
Machine Learning Methods
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