Treatment method for loess stratum road and bridge foundations
A treatment method and loess technology, applied in soil protection, infrastructure engineering, construction, etc., to achieve the effect of simple construction, large adjustable range, and strong durability
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[0015] The present invention will be further described in detail below in conjunction with embodiments:
[0016] a. Measuring and laying out: According to the foundation plan and pile position map, accurately determine the position of each construction pile and make a mark. After the inspection is correct, carry out the construction and make a record. The allowable deviation of the vertical and horizontal pile positions is ± 50mm;
[0017] b. Pile test: There are nine test piles, three in a group. The hammer has a diameter of 40cm, a height of 1.5m, and a mass of 400kg. The height of each lift is 2.2m, and the free fall impacts the filler to tamping; the aperture is 0.45m, hole pile spacing 0.9m×1.0m, hole depth 9-15m, and then layered backfill with semi-rigid mixed materials, each layer thickness of the lower part is 30cm, each layer is rammed 8 times, the height of the pile top is 2m, each layer is rammed 16 times, the height of the final rammed filling exceeded the design pile ...
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