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A mold bag solidified soil for sea reclamation cofferdam and its preparation method and application method

A technology of solidifying soil and mold bags, which is applied in filling, infrastructure engineering, construction, 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: 2019-05-03
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

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] According to the above-mentioned preparation method of mould bag-solidified soil for reclamation cofferdam according to the present invention, the method comprises the following steps: mixing waste mud, composite flocculant, mud structure agent and biomass fiber according to the ratio of raw materials and stirring to form a uniform slurry, and then injecting it into a uniform slurry. In the hydraulic mold bag, it is solidified and hardened in seawater to form mold bag solidified soil, the mold bag is sewn from non-woven fabric, and there are 3 to 6 filling cuffs on the mold bag. Consistent with the size of the axis of the cofferdam embankment, the height of the solidified soil formed into the mold bag after filling is ≥ 500mm, and the thickness of the mold bag is ≥ 0.5mm. The concrete steps for the preparation of the mould bag solidified soil are as follows:

[0040] (1) Use a mud pump to transport the waste mud formed during the excavation of the mud-water shield machi...

Embodiment 1

[0047] In this embodiment, a mold bag for reclamation cofferdam is used to solidify soil, and its components are composed of waste mud formed by muddy water shield, composite flocculant, mud structure agent and biomass fiber, and the dry weight of the waste mud is used as the benchmark. Among them, the dry weight of waste mud accounts for 40% of the dry weight of the solidified soil in the mold bag, the composite flocculant accounts for 6% of the dry weight of the waste mud, the mud structure agent accounts for 3% of the dry weight of the waste mud, and the crude biomass fiber accounts for 3% of the dry weight of the waste mud. 1% of the dry weight of waste mud. After these ingredients are mixed into a uniform slurry, they are poured into hydraulic mold bags, and then cured and hardened in seawater to form mold bag cured soil.

[0048] The waste mud of this embodiment is the waste mud continuously formed during the excavation process of the earth-digging tunnel mud-water shiel...

Embodiment 2

[0056] The difference between the solidified soil in a mold bag for a reclamation cofferdam in this embodiment and the solidified soil in Example 1 is mainly that the specific substance types and mass ratios of the components in the solidified soil are different. The dry weight of the waste slurry in the solidified soil accounts for 60% of the weight of the slurry when grouting the solidified soil in the mold bag. in:

[0057] The waste mud of the present embodiment is the waste mud formed in the construction of the underground diaphragm wall project, and the inorganic component in the composite flocculant is formed by mixing 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 weight of the composite flocculant; the organic component in the composite flocculant is cationic PAM with a molecular weight of 18 million, and its content is 1 / 10,...

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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 particularly relates to a core structure material of a cofferdam, a dam and a bank protection and a preparation method thereof. Background technique [0002] In recent years, the development of tidal flat development and land reclamation projects is in the ascendant, among which the construction of embankments is a necessary step in the reclamation and land reclamation projects. At present, riprap, mould bag sand, mould bag solidified soil or straw bag soil are often used in China to construct the embankment. Among these cofferdam materials, the cost of straw bag soil is relatively low, but if the core of the embankment piled with straw bag soil is in the In the water level fluctuation area outside the breakwater, due to the high liquid limit of the soil used in the straw bag and the small size of the straw bag, after the stacking construction, the soil in the bag wi...

Claims

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Application Information

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Patent Type & Authority Patents(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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