Split grouting is the most commonly used grouting method.The grouting process parameters directly affect the grout diffusion range.The study of the grout diffusion characteristics has guiding significance for determining on-site construction parameters.Based on a grouting pile site,a flat crack grout diffusion model was established to study the influence of different factors on the maximum diffusion radius of grouting behind the pile foundation.The results show that the increase in grouting pressure causes the maximum diffusion radius of the grout to increase first and then level off,and the optimal grouting pressure is 4 MPa.As the grouting volume increases,the maximum diffusion radius of the grout first increases and then levels off.The increase in cement slurry viscosity leads to a decrease in the maximum diffusion radius of the slurry.When designing the cement slurry,technicians should introduce the influence of the slurry viscosity on the maximum diffusion radius based on the mechanical properties.The maximum diffusion radius of slurry first increases and then decreases with the increase of crack height.When the crack height is 25 cm,it is beneficial to improve the bearing capacity of cast-in-place piles.The crack width has little impact on the maximum diffusion radius.
关键词
后注浆/桩基/浆液/扩散范围/裂缝
Key words
post grouting/pile foundation/grout/diffusion range/cracks
维普
万方数据