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Composite additive for heavy wet soft roadbed and pipeline foundation

A composite additive, soft roadbed technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as unstable quality of wet and soft roadbed, and achieve low material prices, high environmental pollution, and soil foundation. The effect of a large modulus of resilience

Active Publication Date: 2022-05-13
XIAN MUNICIPAL ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A new method needs to be proposed to effectively solve the problem of unstable wet and soft roadbed quality

Method used

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  • Composite additive for heavy wet soft roadbed and pipeline foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of heavy wet soft subgrade, pipe foundation composite additive, consisting of 20wt% cement, 15wt% quicklime, 10wt% fly ash, 11wt% MgCO 3 12wt% polyacrylamide, 16wt% coagulant and 16wt% waterproofing agent mixed composition, in the heavy wet soft soil dosage of 6wt%. The above composite additives are added to the heavy wet soft subgrade and pipeline foundation, and the operation steps of the test section are as follows:

[0049](1) First of all the saturated soil and spring soil on the ground are dug out into piles, according to the heavy wet soft roadbed, pipeline foundation composite additives: the soil will be heavily wet soft roadbed, pipeline foundation composite additives infiltrated into the soil in a 6:94 ratio, and constantly mixed, the number of mixing times is not less than three times, and the heavy wet soft roadbed, pipeline foundation composite additives should be mixed uniformly in the soil, the color is consistent, and the heavy wet soft roadbed and p...

Embodiment 2

[0053] A kind of heavy wet soft subgrade, pipe foundation composite additive, consisting of 15wt% cement, 23wt% quicklime, 12wt% fly ash, 12wt% MgCO 3 11wt% polyacrylamide, 15wt% coagulant and 12wt% waterproofing agent mixed, the amount of doping in heavy wet soft soil is 6wt%. The steps of the test section are consistent with Example 1.

Embodiment 3

[0055] A kind of heavy wet soft subgrade, pipe foundation composite additive, consisting of 25wt% cement, 25wt% quicklime, 8wt% fly ash, 8wt% MgCO 3 8wt% polyacrylamide, 12wt% coagulant and 14wt% waterproofing agent are mixed, and the dosage in the heavy wet soft soil is 6wt. The steps of the test section are consistent with Example 1.

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Abstract

The invention discloses a heavy wet soft roadbed and pipeline foundation composite additive which is prepared from cement, quick lime, fly ash, MgCO3, polyacrylamide, a coagulant, a waterproof agent and the like according to a certain proportion, and the doping amount in heavy wet soft soil is 5wt%-7wt%. The composite additive for the heavy, wet and soft roadbed and the pipeline foundation, provided by the invention, is high in active component content and environment-friendly mineral component content, can effectively treat hardened wet mud, spring soil, sludge, the pipeline wet and soft foundation and the like in the heavy, wet and soft roadbed, and avoids more outward-transportation spoil, serious resource waste and serious environmental pollution caused by replacement and filling and the like; and meanwhile, the heavy wet soft roadbed and the pipeline foundation treated by doping the composite additive are high in strength, strong in waterproofness and large in soil foundation rebound modulus, and are suitable for treatment of wet soft roadbeds and pipeline wet soft foundations of roads and urban roads of various grades.

Description

Technical field [0001] The present invention belongs to the field of wet soft subgrade, pipe foundation and trench backfill treatment technology, specifically relates to a heavy wet soft subgrade, pipe foundation composite additive. Background [0002] After entering the new century, China's highway traffic and urbanization have developed rapidly. Highlighting this is the need for a large number of road and urban road construction sites. [0003] Due to the short construction period, usually the construction of highways and urban roads can not avoid the rainy season, which is often accompanied by the occurrence of wet and soft subgrades, that is, the moisture content in the subgrade soil is too large, resulting in low bearing capacity of the wet and soft subgrade, large deformation of the subgrade after force, and the construction is often accompanied by the phenomenon of uneven settlement of the subgrade, which seriously affects the acceptance quality of the subgrade, and lays ...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B111/27
CPCC04B28/10C04B2111/0075C04B2111/00732C04B2111/27C04B7/00C04B18/08C04B14/26C04B24/2652C04B2103/12C04B2103/65Y02W30/91
Inventor 张博杨龙飞钱琳王彬周天宇陈江贺小卫李健王云宁展胡敏乐
Owner XIAN MUNICIPAL ENG DESIGN & RES INST
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