Abstract
Grouting method is one of foundation treatment methods of immersed tube tunnel, it has good effects on improvement of foundation strength and control of settlement deformation, but there is no mature method yet available for the determination of key technical parameters of foundation treatment by pressure grouting method and for the inspection and assessment of effects of treatment by pressure grouting method of immersed tube tunnel. In response to this problem, through model test, the influences of gradient, roughness, etc. of cushion layer of immersed tube tunnel on the effects of foundation treatment by pressure grouting method are researched and the method for inspection of effects of foundation treatment by pressure grouting method of immersed tube tunnel is proposed. The results show that: the changes of parameters of cushion layer regularly affect the effects of grouting by pressure grouting method and shall be considered in the design; the method combining ground penetrating radar and surface wave detection can effectively inspect the effects of foundation treatment.
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