Mechanically stabilized earth wall abutments for bridge support. Mechanically stabilized earth mse retaining walls have been increasingly used as design alternatives to traditional reinforced concrete retaining walls for supporting earth fills in civil infrastructure projects. Mechanically stabilized earth mse walls introduction this manual is designed for the inspector of mechanically stabilized earth walls. It follows the design guidelines of aashto98 demo 82, aashto02 fhwanhi00043, aashto 20072010, or ncma97 98. Retaining walls mechanically stabilized earth mse walls slope stability slope stabilization. At that time, the reinforced earth company and, to a much lesser extent, vsl retained earth, enjoyed the distinction of being the only designerssuppliers.
This manual is the reference text used for the federal highway administration fhwa national highway institute nhi courses no. Another key features incorporated into vespa2 is the automatic bdf and gdf file updates. Fill type retaining walls are retaining structures constructed from the base of. Design of mechanically stabilized earth walls and reinforced soil slopes volume ii. Inspectors manual for mechanically stabilized earth walls. The dimension systems composite structure distributes loads widely and uniformly over underlying soils. This mechanically stabilized earth walls mse and reinforced soil slopes rss, design and construction guidelines manual which is an update of the current fhwa nhi00043, has evolved from the following aashto and fhwa references. In this study, the plaxis software was utilized to perform the twodimensional 2d numerical. Professor of civil engineering royal military college of canada kingston, ontario, canada. Vespa mse mechanically stabilized earth design software is.
All of these can be analysed efficiently and accurately using the optum g2. Backtoback mechanically stabilized earth walls after berg et al. It is a mechanically stabilized earth mse system composed of cohesionless soil and tensar triax geogrids. Andrew thompson ssl mse plustm ssl, llc 4740 scotts valley dr scotts valley, ca 95066 ph. Shored mechanically stabilized earth walls at the nc194. This manual has been developed in support of fhwa educational programs on the design and. Tencate geosynthetics introduces tencate miraslope design solutions software for mechanically stabilized earth mse applications. The reinforced earth company reco has completed more than 45,000 reinforced earth mse walls across the usa. A mechanically stabilized earth mse retaining wall is a composite structure consisting of alternating layers of compacted backfill and soil reinforcement elements, fixed to a wall facing. The reinforced earth company experts in mse retaining walls.
It can be used for retaining walls, bridge abutments, seawalls, and dikes. Mse walls are typically more costeffective than conventional reinforcedconcrete retaining structuresin some cases by 50 percent or more. Note that aashto9802 is based on allowable stress design asd whereas aashto 20072010 is based on load resistance factor design lrfd. The program allows to transfer some data for additional verification to the following programs. Advantages in economics, ease of construction, and an abundance of proprietary wall systems have increased the popularity of mechanically stabilized earth mse walls. Evaluation of mechanically stabilized earth walls for bridge. This easy to use software program of tencate will assist engineers in determining the reinforcement requirements for reinforced soil slopes and walls. Education center association for mechanically stabilized. The contract delivery methods vary, often confusing the roles and responsibilities of various project team members. Numerical analysis of a mechanically stabilized earth wall.
Education center association for mechanically stabilized earth. Centrifuge modeling of shored mse walls with different. This program is used for design and analysis of reinforced masonry block wall according to various standards. For intermediate geometries between cases 1 and 2, when 0 mechanically stabilized earth walls.
Mechanically stabilized earth walls construction specifier. Mechanically stabilized earth mse walls are wellrecognized alternatives to conventional retaining walls. Vespa mse mechanically stabilized earth design software is different. The course, which has been separated into three parts, covers the following topics. Mechanically stabilized earth mse walls are more popular than ever. Reinforcement pullout capacity in mechanically stabilized earth walls with marginalquality soils kianoosh hatami, jaime e. Download citation centrifuge modeling of shored mse walls with different interface connections in some cases the space available for the mechanically stabilized earth mse wall is less than. Mechanically stabilized earth wall abutments for bridge support introduction using mse structures as direct bridge abutments would be a significant simplification in the design and construction of current bridge abutment systems and would lead to faster construction of highway bridge infrastructures. Evaluation of mechanically stabilized earth walls for. Our mission is to promote the use of mechanically stabilized earth mse retaining structures, engineered and supplied through a single source of. Mse wall this program is used for verification of mechanically stabilized earth walls and segmental retaining walls reinforced by geogrids georeinforcements.
It will provide general guidelines for the inspector. Design and construction of mechanically stabilized earth walls and reinforced soil slopes volume i and ii. Land owners are utilizing these structures to create usable space for new development. Mechanically stabilized earth mse walls software geoengineer. Department of transportation usdot and federal highway administration fhwas 2001 publication, mechanically stabilized earth walls and reinforced soil slopes design and.
Gec 11 design and construction of mechanically stabilized earth walls and reinforced soil slopes. This program is used for verification of mechanically stabilized earth walls. Mse walls can retain earth fills of significant height and sustain surface applied loads at lower cost than reinforced concrete walls. Fill structure the fill type classification refers to the construction method used for the installation of the wall. The bdf block definition file and gdf geogrid definition files will now be automatically updated with all of the latest block and geogrid information. Experimental evaluation of mechanically stabilized earth. The unique ability to compute rigorous upper and lower bounds on the true factor of safety add confidence in the results. Jun 01, 20 reinforcement penetrations from various civil site improvements. This work consists of designing, furnishing materials, and constructing mechanically stabilized earth mse walls in accordance with these specifications and the wall manufacturers recommendations, and in conformance with the lines, grades, designs, and dimensions shown n the i plans or established by the rce.
Prediction of soil reinforcement loads in mechanically. It follows the design guidelines of aashto98demo 82, aashto02fhwanhi00043, aashto07, or ncma9798. Builtin database of available georeinforcement geogrids fortrac, tensar, miragrid, kbgrid, acegrid, secugrid, enkagrid, paralink, paragrid etc. Vespa mse retaining wall design software cti software. Mse wall is an intuitive program for mse wall design mechanically. This work consists of designing, furnishing materials, and constructing mechanically stabilized earth mse walls in accordance with these specifications and the wall manufacturers recommendations, and in conformance with the lines, grades, designs, and dimensions shown n the. Interaction analysis of backtoback mechanically stabilized.
Note that aashto9802 is based on allowable stress design asd whereas aashto07 is based on load resistance factor design lrfd. Geo5 rock stability program analyses the stability of rock slopes and walls for a specified type of failure, including a planar or polygonal slip surface or soil rock. Nebraska transportation center report sprp1 09 p320 final report inspectors manual for mechanically stabilized earth walls this report was funded in part through grants from the federal highway administration and federal transit administration, u. Reinforcement pullout capacity in mechanically stabilized. It follows the design guidelines of aashto98demo 82, aashto02fhwanhi00043, aashto 20072010, or ncma9798. Ncma is limited to geosynthetic reinforced segmental. This practical training program, based on aashto and fhwa technical. Part 1 history or mse structures ancient and modern. Pdf analysis of backtoback mechanically stabilized earth walls. The new york state department of transportation first used mechanically stabilized earth system mses in 1978. Although the basic principles of mse have been used throughout history, mse was developed in its current form in the 1960s. Note that aashto9802 is based on allowable stress design asd whereas aashto 20072010 is based on load resistance factor. This mechanically stabilized earth walls mse and reinforced soil slopes rss, design. Gec 11 design and construction of mechanically stabilized.
The mechanically stabilized earth mse wall course provides an introductory lesson addressing the basics of mse wall design. Inspection and risk assessment of mechanically stabilized earth. Mechanically stabilized earth walls and reinforced soil slopes. The earth retaining structures covered include externally and internally stabilized earth retaining systems. Pdf using a mechanically stabilized earth mse wall as a bridge abutment has. Prequalified mechanically stabilized earth mse wall systems. Downloads retaining wall design software cti software. For intermediate geometries between cases 1 and 2, when 0 download article citation data to the citation manager of your choice. In retaining walls come in a wide variety of types including mass gravity walls, mechanically stabilized earth walls, gabion walls and sheet pile walls. Created by experts in mse design, vespa saves time by automating processes currently done manually, and by integrating the. Mechanically stabilized earth wall abutments for bridge. Fill type retaining walls are retaining structures constructed from the base of the wall to the top i. Mechanically stabilized earth mse or reinforced soil is soil constructed with artificial reinforcing. Berg and others published mechanically stabilized earth walls and reinforced soil slopes design and construction guidelines find, read and cite all the.
It is easily accessible from new york city and its metropolitan area. Interaction analysis of backtoback mechanically stabilized earth walls. Prediction of soil reinforcement loads in mechanically stabilized earth mse walls by tony m. A process for optimizing gradation of marginal backfill of. At that time, the reinforced earth company and, to a much lesser extent, vsl retained earth, enjoyed the distinction of being the only designerssuppliers of this type of system for the department.
Washington state department of transportation fossc materials laboratory geotechnical branch olympia, washington and richard j. Mechanically stabilized earth mse walls, constructed with steel strip reinforcing elements and incremental concrete facing panels, are now an accepted technology in japan and worldwide. Mse wall is an intuitive program for mse wall design mechanically stabilized earth wall. Mse wall mechanically stabilized earth wall design the software in general is very good and ties in well with the way we do things here. Stabilized earth solutions engineering services new. Spreadsheet design of mechanically stabilized earth walls. Mechanically stabilized earth wall abutments for bridge support introduction using mse structures as direct bridge abutments would be a significant simplification in the design and construction of current bridge abutment systems and would lead to faster construction of highway bridge. Created by experts in mse design, vespa saves time by automating processes. Shored mechanically stabilized earth walls at the nc194 averywatagua project keith brabant, p.
The intent of this document is to briefly describe mechanically stabilized earth wall mse wall technology and to describedefine the methodology, equations. Beginning in 1971 with the extremely challenging massive landslide repair in the angeles national forest, and for the next several decades, reinforced earth technology has provided structural, geotechnical and economic solutions for projects of all types. The intent of this document is to briefly describe mechanically stabilized earth wall mse wall technology and to describedefine the methodology, equations and input used for the mse wall design spreadsheet. Design and construction of mechanically stabilized earth.