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| Effects of Water Content on Shear Strength of Silty Sands Reinforced by Grouting First and Freezing Subsequently |
| YU Xue-min |
| The Third Railway Survey and Design Institute Group Corporation，Tianjin 300142，China |
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Abstract Research purposes:Water-bearing silty sands ground is characteristic of small compressibility，large permeating coefficient，none cohesion and poor self-stability，in which there are often accidents of water inflow，sands inflow and collapse. This paper presented a combined method to reinforce the silty sands ground by grouting first and freezing subsequently. Then an experiment was performed，in which the relationship between shear stress and shear displacement of the samples of the silty sands was analyzed under different grouting and freezing conditions and different water context conditions.
Research conclusions:(1)The combined method of grouting first and freezing subsequently can effectively reinforce the silty sands ground.(2)The trends of change in the relationship between shear stress and shear displacement of samples with different water context conditions were obtained by the experiment.(3)Under a certain condition，increasing the water context can improve the shear strength of silty sands ground when applying the combined method.(4)The research results can be applied to the reinforcement of water-bearing silty sands ground and soft ground.
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Received: 18 June 2015
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2015, Vol. 32 
