A series of reduced scale model tests was conducted to inves. Design of mechanically stabilized earth walls and reinforced soil slopes volume ii. This manual is the reference text used for the federal highway administration fhwa national highway institute nhi courses no. Mechanically stabilized earth wall aggregate sampling and testing procedures materials and tests unit february 15, 2019. Mechanically stabilized earth mse or reinforced soil is soil constructed with artificial reinforcing. Experimental evaluation of mechanically stabilized earth walls with. Interaction analysis of backtoback mechanically stabilized earth walls. Design of mse walls for fully saturated conditions introduction over the past three decades, 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. Exponent has extensive experience in evaluating the performance of mechanically stabilized earth mse walls and reinforced soil slopes rss with various types of reinforcement, including metallic reinforcement e. Mechanically stabilized earth mse walls are more popular than ever. Gec 11 design and construction of mechanically stabilized earth walls and reinforced soil slopes. The contract delivery methods vary, often confusing the roles and responsibilities of various project team members. The mechanically stabilized earth mse wall course provides an introductory lesson addressing the basics of mse wall design.
The paper demonstrates reliabilitybased design for tensile rupture and pullout limit states for mechanically stabilized earth mse walls constructed with geosynthetic geogrid reinforcement. Course objectives they seem to crop up everywhere, like cell phone towers. We have provided design and analysis for various types of retaining walls, including rockboulder stacked walls rockery walls, ultrablock gravity walls, lockandload mechanically stabilized earth walls msew, keystone msew, soil nail walls, tangent pile walls, sheet pile walls, and castinplace concrete gravity or cantilever. This research addressed such walls placed in a confined. It can be used for retaining walls, bridge abutments, dams, seawalls, and dikes. 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. Luckily geotechnical engineers have developed a way to strengthen earthen materials with almost no additional effort mechanically stabilized earth aka mse or reinforced soil.
Advantages in economics, ease of construction, and an abundance of proprietary wall systems have increased the popularity of mechanically stabilized earth mse walls. A design criterion for these walls was originally established by the federal highway administration fhwa and has been modified on a state by state basis. Mechanically stabilized earth wall aggregate sampling and. This research document was intended to predict longterm strength loss of geosynthetic tensile capacity, primarily for mechanically stabilized earth mse retaining walls, reinforced soil slopes and foundation applications. Backfill any suitable material, meeting the requirements of section 554, mechanically stabilized earth system, 5542. Mechanically stabilized earth products acf environmental. Mechanically stabilized earth mse walls software geoengineer. Finite element modeling of mechanically stabilized earth walls built. These walls are constructed from the bottom up by placing alternating layers of soil and reinforcement. Reliabilitybased design of internal limit states for. Stability analysis key to designing successful mse structures.
This program is used for design and analysis of reinforced masonry block wall according to various standards. 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 in the plans or established by the rce. Addressing first supported excavations and then mechanically stabilized earth retaining walls. This special provision describes the quality management program qmp for mechanically stabilized earth mse walls. Widening of existing highways often results in new mechanically stabilized earth mse walls being placed in front of existing stable walls. For mse panel walls, use bearing pads that meet section 3.
Retaining wall systems not addressed by the geotechnical engineering design guide no. Fhwa rd97142, 143, 144, and 00157 durability of geosynthetics for highway applications. Land owners are utilizing these structures to create usable space for new development. Design and verification of mechanically stabilized earth with metallic elements or geomembranes, both in static and seismic conditions. Contact the reinforced earth company today for more information about our mse retaining walls. Geosynthetics on the geotechnical information website. Fhwa nhi00044 corrosion degradation of soil reinforcements for mechanically earth stabilized walls and reinforced soil slopes. Although the basic principles of mse have been used throughout history, mse was developed in its current form in the 1960s. Discusses corrosion of metals, corrosive soil environments, geosynthetic durability and degradation, monitoring and testing for soil reinforcements. Prediction of soil reinforcement loads in mechanically.
This means, in some cases material test by valid laboratories is of certain need. This special provision describes designing, furnishing materials and erecting a permanent earth retention system in accordance to the lines, dimension, elevations and details as shown on the plans and provided in the contract. It can be used for retaining walls, bridge abutments, seawalls, and dikes. A quality management program is defined as all activities, including process control, inspection, sampling and testing, and necessary adjustments in the process that are related to the construction of the mse wall, which meets. Design of mechanically stabilized earth walls and reinforced soil slopes volume i. 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. 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. Washington state department of transportation fossc materials laboratory geotechnical branch olympia, washington and richard j. Retaining walls mechanically stabilized earth mse walls earth retaining.
May 16, 2016 luckily geotechnical engineers have developed a way to strengthen earthen materials with almost no additional effort mechanically stabilized earth aka mse or reinforced soil. Retaining wall publications available for free downloading. Assessing the longterm performance of mechanically stabilized earth walls explores methods to assess the longterm performance of mechanically stabilized earth walls. Professor of civil engineering royal military college of canada kingston, ontario, canada. Dec 03, 2009 modular block walls, or segmental retaining walls srws are a type of mechanically stabilized earth mse structure built with mortarless concrete block facing commonly reinforced with geosynthetics. Mechanically stabilized earth walls construction specifier. Trbs national cooperative highway research program nchrp synthesis 437. The reinforced earth company experts in mse retaining walls.
Members association for mechanically stabilized earth. The reinforced earth company has built a reputation for engineering excellence, architectural creativity, and an unyielding focus on quality and customer support. Large scale triaxial testing of mechanically stabilized earth. As a federal highway administration design reference for highway projects, this report was prepared to enable the engineer to identify and evaluate potential applications of shored mechanically stabilized earth smse walls. The association for mechanically stabilized earth amse is a professional trade association for producers of mechanically stabilized earth mse retaining structures and their suppliers. Mechanically stabilized earth system mses walls require a high quality backfill for durability, constructability, satisfactory drainage and good soil reinforcement interaction which can be obtained from well graded, granular materials.
Mse wall is an intuitive program for mse wall design mechanically stabilized earth wall. This special provision describes designing, furnishing materials and erecting a permanent earth retention system in accordance to the lines, dimension, elevations. Mechanically stabilized earth wall how is mechanically. The design of these walls is unique because limited rightofway often forces the length of the reinforcing strips to be shorter than normally used. Retaining walls slope stability mechanically stabilized earth mse walls this program is used for verification of mechanically stabilized earth walls and segmental retaining walls reinforced by geogrids georeinforcements. Jun 01, 20 advantages in economics, ease of construction, and an abundance of proprietary wall systems have increased the popularity of mechanically stabilized earth mse walls. Retaining walls mechanically stabilized earth mse walls slope stability slope stabilization. Backfill and compact behind the stabilized volume, with the specified material according to subsections 209. Shored mechanically stabilized earth smse wall systems design guidelines. Bsp wall modular block mechanically stabilized earth lrfdqmp. Mechanically stabilized earth or mse is soil constructed with artificial reinforcing.
Mechanically stabilized earth mse walls, also called reinforced soil walls, are commonly used structures for retaining the earth under bridges, highways, railroads, water front ports, and various other types of infrastructure. Provide mse walls that are reinforced with galvanized. We reduce uncertainty and improve the bottom line on projects for highways, waterfronts, industries, commercial and military projects in all 50 states. The stability of the wall system is derived from the interaction between the backfill and soil reinforcements, involving friction and tension. Variations on the basic design, including curves, tiers, railings, stairs, walkways and the like are making them more and more attractive to designers and architects. Abaqus, mechanically stabilized earth walls, welded wire. D 698 moisture density relationship for soils, standard proctor density method q. Stabilized earth solutions engineering services new. Prediction of soil reinforcement loads in mechanically stabilized earth mse walls by tony m. Shored mechanically stabilized earth smse wall systems.
Mechanically stabilized earth mse retaining walls are growing in popularity. A mechanically stabilized earth mse retaining wall is a composite structure consisting of alternating layers of compacted backfill and soil reinforcement. Microwave synthetic aperture radar imaging for nondestructive evaluation of mechanically stabilized earth walls article pdf available in materials evaluation 752 february 2017 with 609 reads. Design and construction of mechanically stabilized earth walls and reinforced soil slopes volume i and ii. Bsp wall wire faced mechanically stabilized earth lrfdqmp. Ncma national concrete masonry association uses the ncma design manual for segmental retaining walls, first edition 1993, second edition 1997 and third edition 2009. Verification and design of retaining walls gravity, semigravity and cantilever. D 4595 tensile properties of geotextiles by the wide width strip method n. Where the stabilized volume supports spread footings for bridges or other structural loads, compact the top 5 feet 1.
Fhwanhi 00043, 2001 and mechanically stabilized earth wall inspectors handbook published by florida department of transportation, geotechnical. Chapter two state of mechanically stabilized earth wall. This program is used for verification of mechanically stabilized earth walls and. Pdf microwave synthetic aperture radar imaging for.
Wall modular block mechanically stabilized earth structure, item spv. Mechanically stabilized earth wall aggregate sampling and testing procedures materials and tests unit february 15, 2019 north carolina department of transportation. This manual was prepared to enable the engineer to identify and evaluate potential applications of mse walls. Modular block walls, or segmental retaining walls srws are a type of mechanically stabilized earth mse structure built with mortarless concrete. The following mechanically stabilized earth mse panel type systems are approved for use on txdot projects. Design of mechanically stabilized earth walls and reinforced. The course, which has been separated into three parts, covers the following topics. Vespa mse mechanically stabilized earth design software is different. Nhi00043, mechanically stabilized earth walls and reinforced soil slopes design and construction guidelines, march 2001. Design and construction of mechanically stabilized earth walls and.
Gec 11 design and construction of mechanically stabilized. It follows the design guidelines of aashto98demo 82. We hereby certify that the design calculations for the internal stability of the mechanically stabilized earth retaining structure and the detail drawings included in this construction submission are in complete conformance with the aashto standard specifications for highway bridges, 17th edition, 2002 and the mse wall supplemental. The use of mechanically stabilized earth mse retaining walls has become quite prevalent in highway embankment applications.