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《Rock and Soil Mechanics》 2007-10
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Space effect of soil-nailing excavation protection

WU Zhi-min,TU Yu-min(Department of Civil Engineering,Zhejiang University,Hangzhou310027,China)  
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.
【CateGory Index】: TU470.3
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