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2007•Rock and Soil MechanicsRequires access

Space effect of soil-nailing excavation protection

TU Yu-min

Open publisher page 8 citations

Abstract

A three-dimension elastoplastic model had been developed to study the space effect of the soil-nailing excavation protection.The positive corner effect,negative corner effect and layered excavation were emphatically analyzed.The researches showed that: the negative corner of excavation could reduce the displacement of excavation and the force of soil-nail;and its influence was once more than the depth of the excavation;meanwhile,the displacement of the excavation and the force of soil-nailing were much larger in the positive corner;and its influence is near to 3 times of the depth of the excavation;the space effect of soil-nailing pit could be used plenarily by layered excavation;its influence was near to the depth of the excavation.It was proved that three-dimension numeric analysis of the soil-nail structure was very useable.

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What this paper is about

A three-dimension elastoplastic model had been developed to study the space effect of the soil-nailing excavation protection.The positive corner effect,negative corner effect and layered excavation were emphatically analyzed.The researches showed that: the negative corner of excavation could reduce the displacement of excavation and the force of soil-nail;and its influence was once more than the depth of the excavation;meanwhile,the displacement of the excavation and the force of soil-nailing were much larger in the positive corner;and its influence is near to 3 times of the depth of the excavation;the space effect of soil-nailing pit could be used plenarily by layered excavation;its influence was near to the depth of the excavation.It was proved that three-dimension numeric analysis of the soil-nail structure was very useable.

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Available abstract

A three-dimension elastoplastic model had been developed to study the space effect of the soil-nailing excavation protection.The positive corner effect,negative corner effect and layered excavation were emphatically analyzed.The researches showed that: the negative corner of excavation could reduce the displacement of excavation and the force of soil-nail;and its influence was once more than the depth of the excavation;meanwhile,the displacement of the excavation and the force of soil-nailing were much larger in the positive corner;and its influence is near to 3 times of the depth of the excavation;the space effect of soil-nailing pit could be used plenarily by layered excavation;its influence was near to the depth of the excavation.It was proved that three-dimension numeric analysis of the soil-nail structure was very useable.

Key concepts: Excavation, Soil nailing, Geotechnical engineering, Displacement (psychology), Geology, Engineering, Psychology, Psychotherapist

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