Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

A lot of soil nail retaining walls in southern California are under construction. Some of them will be used as shoring systems for bridge or other kind of retaining wall constructions. Design and design review process are very time consuming, and the possibility of mistakes encourages us to find a simplified method for designing the soil nail walls. The maximum height of the soil nail walls in that region were about 14m, including 9 rows of 25mm steel rods (nails) in 150mm diameter holes with different lengths. Whole length of the drilled holes will be filled with grout after setting the nails in. A steel mesh along with the rebar will be set at middle of the shotcrete thickness before placing shotcrete. After placing shotcrete, the bearing plate and the nut will be set at each nail location. At this stage, the shotcrete and the nails would be enough to act like as shoring system. To build a soil nail retaining wall another mesh of rebar will be installed between the shotcrete and the LOL (lay out line) of the wall before placing the wall concrete The simplified KZP5 method is based on the soil mechanic concepts for the granular soils and the Boussinesq strip load method for the possible surcharge behind the wall. In this paper besides considering the soil nail wall design and construction procedure, regular dimensions and loading, the simplified method (KZP5) will be presented. An example will be solved based on this and the conventional method to show the accuracy of the simplified method. An example will be considered to show the accuracy of this trail and error method.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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The Simplified KZP5 Method for Soil Nail Design in Granular Soils

Arlington, Virginia

A lot of soil nail retaining walls in southern California are under construction. Some of them will be used as shoring systems for bridge or other kind of retaining wall constructions. Design and design review process are very time consuming, and the possibility of mistakes encourages us to find a simplified method for designing the soil nail walls. The maximum height of the soil nail walls in that region were about 14m, including 9 rows of 25mm steel rods (nails) in 150mm diameter holes with different lengths. Whole length of the drilled holes will be filled with grout after setting the nails in. A steel mesh along with the rebar will be set at middle of the shotcrete thickness before placing shotcrete. After placing shotcrete, the bearing plate and the nut will be set at each nail location. At this stage, the shotcrete and the nails would be enough to act like as shoring system. To build a soil nail retaining wall another mesh of rebar will be installed between the shotcrete and the LOL (lay out line) of the wall before placing the wall concrete The simplified KZP5 method is based on the soil mechanic concepts for the granular soils and the Boussinesq strip load method for the possible surcharge behind the wall. In this paper besides considering the soil nail wall design and construction procedure, regular dimensions and loading, the simplified method (KZP5) will be presented. An example will be solved based on this and the conventional method to show the accuracy of the simplified method. An example will be considered to show the accuracy of this trail and error method.