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Full-Text Articles in Engineering
Development Of A Laboratory Test For Evaluation Of Geogrid Materials, Charlie Sun, R. Clark Graves
Development Of A Laboratory Test For Evaluation Of Geogrid Materials, Charlie Sun, R. Clark Graves
Kentucky Transportation Center Research Report
Two test methods have been developed in this project. The first test method is a compression test of a cylinder constructed out of geogrid material and filled with crushed stone. This test is simple and can be easily performed. Only a compression loading machine is needed for this test. The sample preparation is straightforward. However, multiple tests must be run to analyze geogrids with different ultimate tensile strength or different grid aperture size on machine direction and cross machine direction. The second test method is Geogrid Bearing Ratio (GBR) test. This test was developed to measure the effect of geogrids …
Analysis Of The Pile Load Tests At The Us 68/Ky 80 Bridge Over Kentucky Lake, Edward Lawson
Analysis Of The Pile Load Tests At The Us 68/Ky 80 Bridge Over Kentucky Lake, Edward Lawson
Theses and Dissertations--Civil Engineering
Large diameter piles are widely used as foundations to support buildings, bridges, and other structures. As a result, it is critical for the field to have an optimized approach for quality control and efficiency purposes to measure the suggested number of load tests and the required measured capacities driven piles. In this thesis, an analysis of a load test program designed for proposed bridge replacements at Kentucky Lake is performed. It includes a detailed site exploration study with in-situ and laboratory testing. The pile load test program included monitoring of a steel H-pile and steel open ended pipe pile during …
Bearing Capacity Analysis And Design Of Highway Base Materials Reinforced With Geofabrics, Tommy C. Hopkins, Liecheng Sun, Mikhail E. Slepak
Bearing Capacity Analysis And Design Of Highway Base Materials Reinforced With Geofabrics, Tommy C. Hopkins, Liecheng Sun, Mikhail E. Slepak
Kentucky Transportation Center Research Report
The primary objective of this study was to develop and implement mathematical bearing capacity models originally proposed by Hopkins (1988, 1991) and Slepak and Hopkins (1993; 1995). These advanced models, which are based on limit equilibrium and are operated together, can be used to analyze the bearing capacity, or stability, of early construction of loads on a single layer of material, two-layered problems involving a layer of base aggregate and subgrade, and a foundation involving multiple layers of different materials, such as a flexible asphalt pavement. A Prandlt-type shear surface is used in the model analyses of layered foundations. In …
Construction And Performance Of Highway Soil Subgrades Modified With Atmospheric Fluidized Bed Combustion Residue And Multicone Kiln Dust, David Q. Hunsucker, Tommy C. Hopkins, Tony L. Beckham, R. Clark Graves
Construction And Performance Of Highway Soil Subgrades Modified With Atmospheric Fluidized Bed Combustion Residue And Multicone Kiln Dust, David Q. Hunsucker, Tommy C. Hopkins, Tony L. Beckham, R. Clark Graves
Kentucky Transportation Center Research Report
In an effort to increase the utilization of by-product materials in highway construction projects, the Kentucky Transportation Cabinet authorized the experimental use of reside from an atmospheric fluidized bed combustion (AFBC) process and multicone kiln dust (MKD), a by-product resulting from the production of lime, as subgrade soil modifiers. This report presents information relative to preconstruction and post-construction laboratory evaluations, construction procedures, construction monitoring activities, and performance evaluations of a highway subgrade solid modified using AFBC spent lime, MKD, Type IP cement, and hydrated lime. An untreated section served as a control section for the project located on Kentucky Route …
Bearing Capacity Analysis Of Pavements, Tommy C. Hopkins
Bearing Capacity Analysis Of Pavements, Tommy C. Hopkins
Kentucky Transportation Center Research Report
A multilayered, mathematical model for analyzing the ultimate bearing capacity of soil subgrades and asphalt pavements is presented. Theoretical considerations and mathematical derivations of limit equilibrium equations, based on plasticity principles, for analyzing the ultimate bearing capacity of soil subgrades and partially completed asphalt pavements, and the extension of these equations to the analyses of asphalt pavements composed of multiple layers, are presented. The model is unique since shear strength parameters, Φ and c, (the angle of internal friction and cohesion, respectively) are used to describe each layer of material of the pavement structure and a factor of safety against …
Unstable Subgrade, I 65, Hardin County (I 65 - 5 (17) 92; Fsp 047-0065-091-0396), Tommy C. Hopkins, Gary W. Sharpe
Unstable Subgrade, I 65, Hardin County (I 65 - 5 (17) 92; Fsp 047-0065-091-0396), Tommy C. Hopkins, Gary W. Sharpe
Kentucky Transportation Center Research Report
During construction of the southbound lanes of I 65, Stations 120+00 to 218+00, in Hardin County, Kentucky, near Elizabethtown, large deformations were observed when dense-graded aggregate (DGA) base courses were loaded with construction traffic. Rutting and cracking of the DGA also was noticeable. A study was performed to determine the causes of the unstable subgrade and base, recommend remedial actions, and evaluate the effectiveness of the remedial measures. The stability, or bearing capacity, of the unstable pavement was determined for different construction stages and combinations of pavement layer thicknesses using a relatively new stability model HOPK-I. The stability of the …