Wet and soft soil foundation treatment method

Abstract

The invention discloses a wet and soft soil foundation treatment method which comprises the steps of 1, backfilling completely within the roadbed width range; 2, before roadbed construction, firstly, removing surface water, and then removing the surface layer salinized soil and surface organic matter of a construction region; 3, backfilling gravel soil within the treatment range, and carrying out primary rolling; after rolling is finished, leveling to form a cross slope; 4, excavating two trapezoid drainage ditches respectively at the two sides of a roadbed; 5, laying a plastic drainage plate; 6, dynamic compaction, compacting by points for twice and fully compacting for once; 7, after dynamic compaction treatment, rearranging the roadbed, and cleaning the overground part of the top of the drainage plate; laying a middle coarse sand cushion layer as a drainage channel, wherein the gradient of the middle coarse sand cushion layer is equal to that of the roadbed; placing a bending part of the plastic drainage plate in the center of the sand cushion layer to enable the bending part to be communicated with the sand cushion layer; 8, backfilling gravel soil onto the middle coarse sand cushion layer; 9, after the roadbed is finished, laying gravel on the surface layer, rolling and compacting.

Description

technical field [0001] The invention discloses a wet and soft soil foundation treatment method. Background technique [0002] At present, in some coastal or riverside areas, the foundation soil is divided into 8 layers from top to bottom: [0003] ①Plain fill: yellowish brown, loose, slightly wet to very wet, mainly composed of pebbles and gravel, which is new fill. [0004] ② Layer of muddy silty clay: gray-yellow-gray, fluid-soft plastic, medium dry strength, medium toughness, fishy smell, containing sporadic broken shells. [0005] ③ layer of muddy silt, gray, loose, saturated, medium shaking response, dull response, low dry strength, low toughness, fishy smell, containing a small amount of fine sand and broken shells. [0006] ④ layer of muddy silty clay: gray, soft plastic, medium dry strength, medium toughness, fishy smell, containing sporadic broken shells. The field is widely distributed; [0007] ⑤ layer of silty clay: gray, plastic, medium dry strength, medium ...

AI Technical Summary

Problems solved by technology

[0028] For foundation treatment in areas with thicker silt layers, the high-vacuum compaction method is also called "low-level layered preloading high-vacuum compaction method". This method has a large treatment depth, but the cost is slightly higher