Mold bag curing soil for sea filling and cofferdam, preparation method and application method thereof

A technology of solidifying soil and mold bags, which is applied in filling, construction, infrastructure engineering, etc., can solve the problems that the extremely dilute engineering waste mud cannot be solidified directly and at low cost, and the sludge solidification effect is difficult to meet the requirements, so as to achieve high efficiency and fast Curing, improving the curing effect, and preventing potential safety hazards

Active Publication Date: 2017-06-30
SHENZHEN HONGYEJI GEOTECHNICAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This application is an environmental protection technology that uses slag, fly ash, alkali slag and other industrial wastes instead of cement for sludge solidification, so that waste utilization, environmental governance and waste environmental protection can be achieved, but its solidification effect on sludge is still It is difficult to meet the requirements, especially the direct and low-cost solidification of extremely dilute engineering waste slurry with a moisture content higher than 80% cannot be realized

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0039] The preparation method of the above-mentioned mold bag solidified soil for sea reclamation cofferdam of the present invention, the method is to mix and stir the waste mud, composite flocculant, mud structure agent and biomass fiber according to the proportion of raw materials to form a uniform slurry, inject The mold bag is solidified and hardened in the seawater to form the mold bag solidified soil. The mold bag is made of non-woven fabric, and there are 3 to 6 filling cuffs on the mold bag. The length direction dimension The size of the axis line of the core of the cofferdam embankment is consistent. After filling, the height of the solidified soil formed into the mold bag is ≥ 500mm, and the thickness of the mold bag is ≥ 0.5mm. The concrete steps of this mold bag solidified soil preparation are as follows:

[0040] (1) Use a mud pump to transport the waste mud formed during the tunneling process of the mud-water shield machine or the waste mud formed in the foundati...

Embodiment 1

[0047] A mold bag solidified soil for sea reclamation cofferdam in this embodiment, its components are composed of waste mud formed by mud-water shield, composite flocculant, mud structure agent and biomass fiber, based on the dry weight of waste mud , wherein the dry weight of waste mud accounts for 40% of the slurry weight during grouting of mold bag solidified soil, the composite flocculant accounts for 6% of the dry weight of waste mud, the mud structure agent accounts for 3% of the dry weight of waste mud, and the coarse biomass fiber accounts for 1% of the dry weight of waste mud. After these ingredients are mixed into a uniform slurry, it is poured into the hydraulic mold bag, solidified and hardened in seawater to form the mold bag solidified soil.

[0048] The waste mud in this embodiment is the waste mud continuously formed during the excavation process of the mud-water shield machine in the ground excavation tunnel, and its water content is 80%, which also contains ...

Embodiment 2

[0056] A kind of mold bag solidified soil for reclamation cofferdam of the present embodiment, its difference with the solidified soil in embodiment 1 mainly lies in: the specific material type and the mass ratio of each component in the solidified soil are different, the mold bag of the present embodiment The dry weight of the waste mud in the solidified soil accounts for 60% of the slurry weight when the mold bag solidified soil is grouted, and the mass ratios of other components are shown in Table 1 (the amount of each component is the percentage of the added absolute dry waste mud composition), in:

[0057] The waste mud of the present embodiment is the waste mud formed in the construction of underground diaphragm wall. The inorganic components in the composite flocculant are mixed by slag fine powder and fly ash, and the mixing ratio is slag fine powder:fly ash=3: 2. The specific surface area of ​​the inorganic component is 510m 2 / kg, its content is 99.99% of the total ...

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Abstract

The invention discloses a mold bag curing soil for sea filling and cofferdam, a preparation method and an application method thereof, and belongs to the technical field of marine materials. The mold bag curing soil is prepared from the following raw materials: waste mud, a composite flocculant, a mud structure agent and biomass fibers, wherein by adopting the dry weight of the waste mud as the reference, the dry weight of the waste mud accounts for 40-60% of the total weight of the slurry during the slurry injection of the mold bag curing soil, the composite flocculant accounts for 6-9% of the dry weight of the waste mud, the mud structure agent accounts for 3-4.5% of the dry weight of the waste mud, and the biomass fibers accounts for 0-2.5% of the dry weight of the waste mud. With the technical scheme of the present invention, the curing effect of the mold bag filling material for the sea filling and cofferdam can be effectively improved, and the product can be directly used for the reclamation project after the curing treatment, and can meet the use requirements of the cofferdam construction project.

Description

technical field [0001] The invention belongs to the technical field of marine engineering materials, and more specifically relates to a core structure material for cofferdams, embankments and bank revetments and a preparation method thereof. Background technique [0002] In recent years, the development of tidal flat land reclamation projects is in the ascendant, and dike construction is a necessary step in the sea reclamation projects. At present, riprap, mold bag sand, mold bag solidified soil or straw bag soil are often used to construct dikes in China. Among these cofferdam materials, the cost of straw bag soil is relatively low. In the water level fluctuation area outside the breakwater, due to the high liquid limit of the soil taken locally in the straw bag, and the small size of the straw bag, after stacking construction, the soil in the bag will be washed away by a large amount of waves and currents. In the end, there are only empty bags left, so construction can on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B28/14E02D19/04E02D17/18C04B111/74
CPCC04B28/065C04B28/144C04B2111/00017C04B2111/00146C04B2111/74C04B2201/50E02D17/18E02D19/04E02D2300/0023C04B18/0418C04B18/141C04B24/2652C04B7/02C04B18/248C04B7/04C04B18/08C04B7/323C04B18/142
Inventor 樊传刚吴瑞吴悠朱伟陈枝东
Owner SHENZHEN HONGYEJI GEOTECHNICAL TECH CO LTD
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