Study On Model Experimentation Of The Micro-steel Piles Composite Soil Nailing Retaining Wall By Simulate Rain And Stacking Simulate Heavy

With the exploiting and utilizing of urban underground space, the problem of foundation excavation support of underground structures has become increasingly serious. Foundation excavation support technology develop continually, the Micro-steel Piles advance-Supported Composite Soil Nailing Retaining Wall is a new technology in china .It has many strong points compare with big diameter support piles, for example ,adaptability, easy construction, small transmutation ,low cost and so on .The Micro-steel Piles advance-Supported Composite Soil Nailing Retaining Wall is a new technology ,which is one of Soil Nailing Retaining Wall .It has small transmutation and can be used in excavation support that the deep exceeds 12 meters and that the angle lesses than 0.1.This paper briefly reviews the research in The Micro-steel Piles advance-Supported Composite Soil Nailing Retaining Wall , also introduces its mechanism and transmutation characteristic. In simulate rain and stacking simulate heavy experimentation , it obtains data includes Soil Pressure, Soil Nailing Pull, Micro-steel Piles Moment, and expatiates on mechanism.In Simulate Rain condition,Soil Pressure curve doesn't accord with classics curve,and the Overconsolidated Soil Pressure decreases drastically, Soil Pressure increases along with Moisture Content. In Simulate Rain condition,Soil Nail axi-force curve form doesn't change, and Horizontal Steel Bar Stress and Displacement increases.In Atacking Simulate heavy condition,Soil Pressure curve doesn't accord with classics curve, Soil Pressure intense changes, but not surely increases. In Atacking Simulate heavy condition,Soil Nail axi-force curve form doesn't change, and Horizontal Steel Bar Stress and Displacement increases.By the data analysis, discovers the Soil Pressure, Soil Nailing Pull, Micro-steel Piles Moment, surface strengthened reinforcing steel bar stress change rule in analog rain and stacking analog heavy experimentation conditions .The paper provides availability and reference for The Micro-steel Piles advance-Supported Composite Soil Nailing Retaining Wall design.