Author: Highway Innovative Technology Evaluation Center (U.S.)
Publisher: ASCE Publications
ISBN: 9780784475591
Category : Technology & Engineering
Languages : en
Pages : 232
Book Description
Evaluation of the Retained Earth MSE Wall System by Foster Geotechnical, a Division of L.B. Foster Company
Author: Highway Innovative Technology Evaluation Center (U.S.)
Publisher: ASCE Publications
ISBN: 9780784475591
Category : Technology & Engineering
Languages : en
Pages : 232
Book Description
Publisher: ASCE Publications
ISBN: 9780784475591
Category : Technology & Engineering
Languages : en
Pages : 232
Book Description
Evaluation of the Retained Earth MSE Wall System by Foster Geotechnical, a Division of L.B. Foster Company
Author:
Publisher: Hitec
ISBN: 9780784407554
Category : Concrete walls
Languages : en
Pages :
Book Description
Publisher: Hitec
ISBN: 9780784407554
Category : Concrete walls
Languages : en
Pages :
Book Description
Evaluation of the Geo-Con VERT Wall System
Author: Highway Innovative Technology Evaluation Center (U.S.)
Publisher: ASCE Publications
ISBN: 9780784475133
Category : Technology & Engineering
Languages : en
Pages : 198
Book Description
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF/IIEC Innovation Center This report describes a HITEC evaluation designed to determine the basic capabilites and limitations of the Geo-Con VERT Wall for use as a technically viable permanent excavation support retaining wall system. The evaluation was conducted based on design, construction, performance, and quality assurance information outlined in the HITEC Protocol. The Geo-Con VERT Wall System is an in-situ retaining wall system intended as an alternative to other types of cut walls such as soldier pile and anchored retaining walls. Geo-Con VERT Wall System is comprised of: deep soil mix columns consisting of overlapping or tangent soil-cement columns along the front face backed up by tangent rows of overlapping soil-cement columns; a soil-cement relieving platform overtop the columns; steel beams embedded in the front face soil-cement columns for support of the permanent facing; and permanent facing consisting of precast, reinforced concrete panels or reinforced cast-in-place concrete. The relieving platform is intended to provide internal stability by typing the soil-mix columns together and transferring the load to the bottom of the columns.
Publisher: ASCE Publications
ISBN: 9780784475133
Category : Technology & Engineering
Languages : en
Pages : 198
Book Description
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF/IIEC Innovation Center This report describes a HITEC evaluation designed to determine the basic capabilites and limitations of the Geo-Con VERT Wall for use as a technically viable permanent excavation support retaining wall system. The evaluation was conducted based on design, construction, performance, and quality assurance information outlined in the HITEC Protocol. The Geo-Con VERT Wall System is an in-situ retaining wall system intended as an alternative to other types of cut walls such as soldier pile and anchored retaining walls. Geo-Con VERT Wall System is comprised of: deep soil mix columns consisting of overlapping or tangent soil-cement columns along the front face backed up by tangent rows of overlapping soil-cement columns; a soil-cement relieving platform overtop the columns; steel beams embedded in the front face soil-cement columns for support of the permanent facing; and permanent facing consisting of precast, reinforced concrete panels or reinforced cast-in-place concrete. The relieving platform is intended to provide internal stability by typing the soil-mix columns together and transferring the load to the bottom of the columns.
Evaluation of Precast GeoMega MSE Wall System by the Reinforced Earth Company with Geostrap Polymeric Reinforcement
Reliability Analysis of Mechanically Stabilized Earth (MSE) Walls
Evaluation of the Stabilized Earth Wall System by TandB Structural Systems
Author:
Publisher:
ISBN: 9780784412213
Category : Earth construction
Languages : en
Pages :
Book Description
Publisher:
ISBN: 9780784412213
Category : Earth construction
Languages : en
Pages :
Book Description
Evaluation of the Structural Performance of Bridge MSE Retaining Walls
Author: Zaid SM Momani
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 236
Book Description
Mechanically Stabilized Earth (MSE) walls have been used extensively since the first MSE wall constructed in California in the early 70's. MSE walls proved that they are reliable, cost-effective, aesthetically pleasing, and easily constructible. However, the design criteria of an MSE wall does not always incorporate the comprehensive behavior. A reasonable number of MSE walls do not perform as expected; a few experienced catastrophic failure. The current study was inspired by multiple MSE walls showing excessive movement of the precast panels in Fort Worth and Hurst, Texas. Three most critical MSE walls were selected for this study. The main focus of this research is to 1) periodically monitor the movement of the walls; 2) evaluate the effect of wall movement on earth reinforcement, precast panels, approach slab, copings and traffic barriers; 3) recommend remedial measures on the earth reinforcement to prevent rupture or pullout; 4) perform several field and lab tests on the backfill soil material to check the integrity of the backfill soil; and 5) develop a 3D Finite Element Modeling (FEM) of an MSE wall using ABAQUS software to predict the actual behavior of an MSE wall and investigate the wall failure criteria. Several non-destructive tests were performed on the critical walls. A laser scanner was used to monitor the movement of the precast panels. Ground Penetrating Radar (GPR) was used to examine the integrity of the earth reinforcement. A subsurface investigation was conducted using Resistivity Imaging (RI) technique to investigate the presence of groundwater table or perched water zones. Regression and structural reliability analyses were carried out to investigate the effect of significant parameters on wall performance and check the integrity of MSE wall design formulas of FHWA (2009), respectively.
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 236
Book Description
Mechanically Stabilized Earth (MSE) walls have been used extensively since the first MSE wall constructed in California in the early 70's. MSE walls proved that they are reliable, cost-effective, aesthetically pleasing, and easily constructible. However, the design criteria of an MSE wall does not always incorporate the comprehensive behavior. A reasonable number of MSE walls do not perform as expected; a few experienced catastrophic failure. The current study was inspired by multiple MSE walls showing excessive movement of the precast panels in Fort Worth and Hurst, Texas. Three most critical MSE walls were selected for this study. The main focus of this research is to 1) periodically monitor the movement of the walls; 2) evaluate the effect of wall movement on earth reinforcement, precast panels, approach slab, copings and traffic barriers; 3) recommend remedial measures on the earth reinforcement to prevent rupture or pullout; 4) perform several field and lab tests on the backfill soil material to check the integrity of the backfill soil; and 5) develop a 3D Finite Element Modeling (FEM) of an MSE wall using ABAQUS software to predict the actual behavior of an MSE wall and investigate the wall failure criteria. Several non-destructive tests were performed on the critical walls. A laser scanner was used to monitor the movement of the precast panels. Ground Penetrating Radar (GPR) was used to examine the integrity of the earth reinforcement. A subsurface investigation was conducted using Resistivity Imaging (RI) technique to investigate the presence of groundwater table or perched water zones. Regression and structural reliability analyses were carried out to investigate the effect of significant parameters on wall performance and check the integrity of MSE wall design formulas of FHWA (2009), respectively.
A Field Study of Construction Deformations in a Mechanically Stabilized Earth Wall
Author: Nathan Daniel Abele
Publisher:
ISBN:
Category : Earthwork
Languages : en
Pages : 300
Book Description
Mechanically stabilized earth (MSE) has been used for over thirty years in the United States. The advantages of MSE, including economics, often out weigh their disadvantages. MSE structures are built with a growing frequency and are not likely to disappear in the foreseeable future. Complete understanding of the system has not yet been widely achieved. This thesis is a study of the movement and deformation during construction of a mechanically stabilized earth structure built as a bridge abutment. The MSE wall studied for this research was constructed as part of an ODOT bridge replacement and widening project located in northwest Ohio. The studied MSE system for this project was a Reinforced Earth Company product. The subsurface conditions under the main MSE wall face include an approximate twenty foot thick clay layer over limestone bedrock. Phased construction was used along with both cast in place and precast leveling pads. Some wall facing deformations presented are expected, while others are more difficult to explain. Results of this research provide information that can be used to better understand deformation during the construction process of similar walls constructed in the future. Comparison of these results to performance of other MSE walls may ease concerns of possible larger problems. Further similar work is likely needed to explain some of the trends presented here.
Publisher:
ISBN:
Category : Earthwork
Languages : en
Pages : 300
Book Description
Mechanically stabilized earth (MSE) has been used for over thirty years in the United States. The advantages of MSE, including economics, often out weigh their disadvantages. MSE structures are built with a growing frequency and are not likely to disappear in the foreseeable future. Complete understanding of the system has not yet been widely achieved. This thesis is a study of the movement and deformation during construction of a mechanically stabilized earth structure built as a bridge abutment. The MSE wall studied for this research was constructed as part of an ODOT bridge replacement and widening project located in northwest Ohio. The studied MSE system for this project was a Reinforced Earth Company product. The subsurface conditions under the main MSE wall face include an approximate twenty foot thick clay layer over limestone bedrock. Phased construction was used along with both cast in place and precast leveling pads. Some wall facing deformations presented are expected, while others are more difficult to explain. Results of this research provide information that can be used to better understand deformation during the construction process of similar walls constructed in the future. Comparison of these results to performance of other MSE walls may ease concerns of possible larger problems. Further similar work is likely needed to explain some of the trends presented here.
Foundations & Earth Structures
Evaluation of Soil and Rock Properties
Author: P. J. Sabatini
Publisher:
ISBN: 9781410217615
Category : Technology & Engineering
Languages : en
Pages : 392
Book Description
This document presents state-of-the-practice information on the evaluation of soil and rock properties for geotechnical design applications. This document addresses the entire range of materials potentially encountered in highway engineering practice, from soft clay to intact rock and variations of materials that fall between these two extremes. Information is presented on parameters measured, evaluation of data quality, and interpretation of properties for conventional soil and rock laboratory testing, as well as in situ devices such as field vane testing, cone penetration testing, dilatometer, pressuremeter, and borehole jack. This document provides the design engineer with information that can be used to develop a rationale for accepting or rejecting data and for resolving inconsistencies between data provided by different laboratories and field tests. This document also includes information on: (1) the use of Geographical Information Systems (GIS) and Personal Data Assistance devices for the collection and interpretation of subsurface information; (2) quantitative measures for evaluating disturbance of laboratory soil samples; and (3) the use of measurements from geophysical testing techniques to obtain information on the modulus of soil. Also included are chapters on evaluating properties of special soil materials (e.g., loess, cemented sands, peats and organic soils, etc.) and the use of statistical information in evaluating anomalous data and obtaining design values for soil and rock properties. An appendix of three detailed soil and rock property selection examples is provided which illustrate the application of the methods described in the document.
Publisher:
ISBN: 9781410217615
Category : Technology & Engineering
Languages : en
Pages : 392
Book Description
This document presents state-of-the-practice information on the evaluation of soil and rock properties for geotechnical design applications. This document addresses the entire range of materials potentially encountered in highway engineering practice, from soft clay to intact rock and variations of materials that fall between these two extremes. Information is presented on parameters measured, evaluation of data quality, and interpretation of properties for conventional soil and rock laboratory testing, as well as in situ devices such as field vane testing, cone penetration testing, dilatometer, pressuremeter, and borehole jack. This document provides the design engineer with information that can be used to develop a rationale for accepting or rejecting data and for resolving inconsistencies between data provided by different laboratories and field tests. This document also includes information on: (1) the use of Geographical Information Systems (GIS) and Personal Data Assistance devices for the collection and interpretation of subsurface information; (2) quantitative measures for evaluating disturbance of laboratory soil samples; and (3) the use of measurements from geophysical testing techniques to obtain information on the modulus of soil. Also included are chapters on evaluating properties of special soil materials (e.g., loess, cemented sands, peats and organic soils, etc.) and the use of statistical information in evaluating anomalous data and obtaining design values for soil and rock properties. An appendix of three detailed soil and rock property selection examples is provided which illustrate the application of the methods described in the document.