Roadbed filling construction method for physical modification of silty-fine sand
A construction method and technology of silt and fine sand, applied in the directions of roads, roads, buildings, etc., can solve the problems that the mixing ratio cannot be arbitrarily adjusted, the road mixing method is unevenly mixed, and the construction cost is large, so as to facilitate large-scale construction and improve Quality and the effect of reducing construction costs
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Embodiment 1
[0045] The subgrade filling construction method of physical improvement of silt and fine sand, the particle size of silt and fine sand is 0.3≥d>0.2mm, and the ratio of silt and fine sand: breccia is 1:1, including the following steps:
[0046] (1) Determine the mixing ratio of 1:1, transport the silt and fine sand and breccia to the backfill roadbed, unload the material by retreating, and form a silt and fine sand heap and a breccia heap respectively, and the space between the two filling heaps A site with a backhoe construction; use a backhoe to dig 1 part (1 shovel) of silt and fine sand and dump it on the blank site between the two filling piles, and then shovel and dig a part of breccia and dump it on top of the silt and fine sand , then pour a portion of silty sand on top of the breccia, pour a portion of breccia on top of the silty sand, and repeat this until the stacking amount reaches half of the layer of the filling layer; the thickness of each layer is 0.3m, Each lay...
Embodiment 2
[0058] The roadbed filling construction method of physical improvement of silt fine sand in embodiment 2, the particle size of silt fine sand is 0.2≥d>0.1mm interval, silt fine sand: round gravel soil is 1:1.5, and the specific operation steps are the same as those of embodiment 1 The difference is:
[0059] In step (1), the mixing ratio is 1:1.5. Use a backhoe to shovel 2 parts (2 shovels) of powder and fine sand and pour it on the blank space between the two filling piles, and then shovel and dig 3 parts of round gravel Pour over the silty sand, then pour 2 parts of silty sand over the round gravel, pour 3 parts of round gravel over the silt, repeat this until the stacking volume reaches 9m 3 So far, one-time admixture A is obtained;
[0060] In step (2), when preparing the primary admixture B, according to the mixing ratio, pour 3 parts of round gravel soil first, then pour 2 parts of powder and fine sand, and pour and pile repeatedly to obtain 9m 3 primary admixture B; ...
Embodiment 3
[0068] The roadbed filling construction method for the physical improvement of silt fine sand in embodiment 3, the particle size of silt fine sand is 0.2≥d>0.1mm interval, the ratio of silt fine sand: breccia is 1:2, and the specific operation steps are the same as those of embodiment 1 The difference is:
[0069] In step (1), the mixing ratio is 1:2, use a backhoe to dig out 1 part (1 shovel) of powder and fine sand and pour it on the blank space between the two filling piles, and then shovel and dig out 2 parts of breccia Pour over the silty sand, then pour 1 part of silty sand over the breccia, pour 2 parts of breccia over the silty sand, and repeat until the stacking volume reaches 9m 3 So far, one-time admixture A is obtained;
[0070] In step (2), when preparing the primary admixture B, according to the mixing ratio, first pour 2 parts of breccia, and then pour 1 part of fine sand, and pour and sprinkle repeatedly to obtain 9m 3 primary admixture B;
[0071] In step (...
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