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Significance and Use
4.1 Mechanically stabilized earth walls (MSEW) are engineered earth retaining structures comprised of pre-fabricated wall facing elements and select backfill that is reinforced with inextensible steel elements. The complete system consists of the original ground, concrete leveling pads, wall facing panels, coping, soil reinforcement, and select backfill. A MSEW is typically subjected to earth loads and surface loads (surcharges). The MSEW relies on self-weight and friction to resist the destabilizing earth forces acting at the back of the reinforced soil zone. They are used frequently in transportation-related civil engineering applications. shows a cross section of a typical panel faced MSEW, and shows the components. shows a cross section of a typical wire faced MSEW cross section, and shows the components.
FIG. 1 Typical Panel Faced MSEW Cross Section
FIG. 2 Components of Typical Panel Faced MSEW
FIG. 3 Typical Wire Faced MSEW Cross Section
FIG. 4 Components of Typical Wire Faced MSEW
1.1 Mechanically stabilized earth walls (MSEW) covered in this standard practice are engineered earth retaining structures comprised of pre-fabricated wall facing elements and select backfill reinforced with inextensible steel elements. This practice covers procedures and components for the construction of MSEW including soil reinforcement, connections to panels, and selection and placement of granular backfill. Such walls may have a segmental precast concrete (SPC) facing or a flexible wire facing. This standard practice does not address the design of MSEW.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A36/A36M Specification for Carbon Structural Steel
A123/A123M Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and Alloy Steel
A572/A572M Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
A780/A780M Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
A902 Terminology Relating to Metallic Coated Steel Products
A1011 Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength
A1064/A1064M Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete
C136/C136M Test Method for Sieve Analysis of Fine and Coarse Aggregates
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D2000 Classification System for Rubber Products in Automotive Applications
D3080/D3080M Test Method for Direct Shear Test of Soils Under Consolidated Drained Conditions
F3125/F3125M Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch Dimensions 120 ksi and 150 ksi Minimum Tensile Strength, and Metric Dimensions 830 MPa and 1040 MPa Minimum Tensile Strength
Canadian StandardCAN/CSA G40.20/G40.21
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM A1115 / A1115M-19, Standard Practice for Construction of Mechanically Stabilized Earth Walls with Inextensible Soil Reinforcement, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top