scholarly journals EFFECT OF SOIL CEMENT COLUMN SPACING AND AREA REPLACEMENT RATIO ON EMBANKMENT BEARING CAPACITY: A QUEENSLAND CASE STUDY

2016 ◽  
Author(s):  
Mark Bolton
Keyword(s):  
Bearing Capacity ◽  
Replacement Ratio ◽  
Soil Cement ◽  
Area Replacement Ratio

Bearing capacity of spread footings on aggregate pier–reinforced clay: updates and stress concentration

2020 ◽  
Vol 57 (5) ◽  
pp. 717-727 ◽  
Author(s):  
Taeho Bong ◽  
Armin W. Stuedlein ◽  
John Martin ◽  
Byoung-Il Kim
Keyword(s):  
Stress Concentration ◽  
Bearing Capacity ◽  
Cross Validation ◽  
Slenderness Ratio ◽  
Ground Improvement ◽  
Analytical Models ◽  
Loading Test ◽  
Replacement Ratio ◽  
Area Replacement Ratio ◽  
Reinforced Clay

Aggregate piers represent an economical ground improvement technique used to increase bearing capacity and reduce settlements of weak soils. Several approaches have been developed to estimate the bearing capacity of aggregate pier–reinforced clay, but these models exhibit large prediction bias and uncertainty. This study uses newly developed footing loading test data to investigate the relationship between the bearing capacity and the area replacement and slenderness ratios. The bearing capacity of a single aggregate pier, whether isolated or in groups, below a loaded footing increases as the area replacement ratio decreases due to increase in extent of confined soil surrounding the pier. The length and diameter of an aggregate pier is also shown to result in significantly increased bearing capacity, an effect that diminishes with increasing slenderness. New modifications are proposed to existing simplified and cavity expansion models to account for the effect of confinement, area replacement ratio, and slenderness ratio using a leave-one-out cross-validation technique. The cross-validation analysis resulted in robust bearing capacity models that are more accurate than existing analytical models. Additionally, the stress concentration ratio for shallow foundations supported by aggregate pier–reinforced plastic soils at failure was estimated and compared with the available data, indicating its sensitivity to design variables and showing that this critical design parameter may be predicted using the updated models.

Optimum Design Study on Leveling Variable Stiffness of Composite Foundation with Rammed Soil-Cement Pile

2010 ◽  
Vol 168-170 ◽  
pp. 2631-2635
Author(s):  
Zhen Shuan Zhang ◽  
Yu Deng ◽  
Wei Zhang ◽  
De Sheng Ju
Keyword(s):  
Optimum Design ◽  
Bending Moment ◽  
Variable Stiffness ◽  
Composite Foundation ◽  
Design Study ◽  
Replacement Ratio ◽  
Practical Project ◽  
Soil Cement ◽  
Area Replacement Ratio ◽  
Pile Length

According to the practical project, settlement, reaction and bending moment of composite foundation with rammed soil-cement pile are recalculated, which based on the change of the original area replacement ratio, pile length and foundation thickness. The method of optimum design study on leveling variable Stiffness is investigated.

scholarly journals Dynamic lot sizing problem under uncertainty of returned products in remanufacturing industry

2018 ◽  
Vol 204 ◽  
pp. 07005
Author(s):  
Iman Setyoaji
Keyword(s):  
Bayesian Inference ◽  
Lot Sizing ◽  
Replacement Ratio ◽  
Total Cost ◽  
Lot Sizing Problem ◽  
Holding Cost ◽  
Dynamic Lot Sizing ◽  
Lot Sizes

Remanufacturing processes face uncertainty in the quality of the items being returned by customers, this significant variability complicates the control of inventories. Demands can be satisfied by procured new items, but also by remanufactured returned items. This paper develops dynamic lot sizing model for remanufacturing industry under uncertainty of returned items and proposes Bayesian Inference to estimate the replacement ratio of returned items that used to determine those lot sizes for new items. The objective of this paper is to minimize the total cost composed of holding cost and set-ups cost. A numerical example is provided based on case study. The result shows that total cost is reduced to be 45%.

Embankment Supported by Low Area Replacement Ratio Stone Columns, Monitoring and Numerical Studies

2021 ◽  
Author(s):  
Mario V. Riccio F ◽  
Marcio S. S. Almeida ◽  
Silvana M. Vasconcelos ◽  
Liliana G. S. Pires ◽  
Luiz F. Nicodemos R
Keyword(s):  
Stone Columns ◽  
Replacement Ratio ◽  
Low Area ◽  
Numerical Studies ◽  
Area Replacement Ratio

scholarly journals Bearing Capacity Improvement Using Micropiles: A Case Study

2004 ◽  
Author(s):  
G. L. Sivakumar Babu ◽  
B. Srinivasa Murthy ◽  
D. S. N. Murthy ◽  
M. S. Nataraj
Keyword(s):  
Bearing Capacity ◽  
Capacity Improvement

Flexural Performance Experimental Study on the Recycled Concrete Beams Under the Influence of Various Factors

2014 ◽  
Vol 926-930 ◽  
pp. 571-575
Author(s):  
Bin Bin Li ◽  
She Liang Wang ◽  
Juan Li Zhao
Keyword(s):  
Experimental Study ◽  
Shear Strength ◽  
Bearing Capacity ◽  
Concrete Beams ◽  
Fiber Composites ◽  
Recycled Concrete ◽  
Experimental Results ◽  
Replacement Ratio ◽  
Flexural Performance ◽  
Aggregate Content

Considering the replacement ratio, reinforcement ratio, baked brick aggregate content, SF, superplasticizer content and multiphase fiber composites content, the 13 RAC beams were tested to study the 5 kinds of effects on the bearing capacity and deformation performance. Based on the experimental results, the following conclusions are drawn: the formulas for the bending bearing capacity and shear strength of recycled concrete beams were recommended, and compared with the experiment results, the reliability of the formulas was verified.

scholarly journals Sustainable ground improvement method using encapsulated polypropylene (PP) column reinforcement

2021 ◽  
Vol 930 (1) ◽  
pp. 012016
Author(s):  
M Hasan ◽  
M S I Zaini ◽  
N A W Hong ◽  
A Wahab ◽  
K A Masri ◽  
...  
Keyword(s):  
Shear Strength ◽  
Soil Sample ◽  
Ground Improvement ◽  
Soft Soil ◽  
Control Sample ◽  
Replacement Ratio ◽  
Replacement Method ◽  
Penetration Ratio ◽  
Area Replacement Ratio ◽  
Strength Improvement

Abstract This study investigates the effectiveness of encapsulated polypropylene (PP) column in enhancing the undrained shear strength of kaolin (soft clay). The usage of PP in treating problematic soil is a more sustainable and cost-effective alternative compared to other materials. The installation of granular column can be done by using vibro-replacement method. Several geotechnical tests to determine the properties of materials were conducted. The shear strength of treated kaolin sample was examined by using Unconfined Compression Test (UCT). There are seven (7) batches of soil sample in total which included a control sample, three (3) batches of 14 mm and three (3) batches of 20 mm diameter PP column. Different diameters of PP column were examined with 60 mm, 80 mm and 100 mm height, respectively with soil sample of 50 mm in diameter and 100 mm in height. The shear strength improvement of kaolin is 33.82%, 46.51%, and 49.88% when implanted with a PP column with a 7.84 area replacement ratio and 0.6, 0.8 and 1.0 penetration ratio. The soft soil treated using 16.00 area replacement ratio with 0.6, 0.8 and 1.0 penetration ratio has a shear strength increment of 25.22%, 33.39% and 37.59% respectively. In short, the shear strength improvement of the kaolin clay depends on the parameter of the PP column used to reinforce the sample.

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