Construction method by utilizing solidified earth from sludge

A construction method and soil solidification technology, which is applied in solid waste management, dehydration/drying/concentrated sludge treatment, sustainable waste treatment, etc., can solve the problems of occupying large cultivated land and polluting the environment, so as to save cultivated land, avoid pollution, The effect of solving difficult problems

Active Publication Date: 2006-10-11
JIANGSU JUHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the nearest landfill can solve the problem of dredging silt disposal, but it will occupy a large amount of cultivated land and pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First dig out the silt from Taihu Lake (or other rivers, lakes and seas), and remove the lumps and sticks;

[0018] Afterwards, the sludge that does not contain lumps and sticks is piled up together, and the weight percentage of its water content is 40% and close to the liquid limit by natural precipitation and evaporation of moisture.

[0019] Afterwards, put the silt with a water content of 40% and close to the liquid limit into the agitator, add cement and fly ash, stir for 30 to 80 seconds, and mix evenly to obtain solidified silt soil; wherein: In the cubic meter of sludge, the addition of cement is 50kg, and the addition of fly ash is 50kg;

[0020] Afterwards, pile the solidified silt for 2 to 3 days to allow it to continue to solidify. When it has early strength and is ready for mechanical paving, it can be laid in layers on the subgrade.

[0021] After paving each layer of solidified silt soil, use 5 tons of sheep foot roller to roll it 6 to 8 times for compa...

Embodiment 2

[0026] First dig out the silt from Taihu Lake (or other rivers, lakes and seas), and remove the lumps and sticks;

[0027] Afterwards, the sludge that does not contain lumps and sticks is piled together, and the weight percentage of its water content is 50% and close to the liquid limit through natural precipitation and evaporation of moisture.

[0028] Afterwards, put the silt with a water content of 50% and close to the liquid limit into the agitator, add cement and fly ash, stir for 30 to 80 seconds, and mix uniformly to obtain solidified silt soil; wherein: In the cubic meter of sludge, the addition of cement is 75kg, and the addition of fly ash is 95kg;

[0029] Afterwards, pile the solidified silt for 2 to 3 days to allow it to continue to solidify. When it has early strength and is ready for mechanical paving, it can be laid in layers on the embankment.

[0030] After paving each layer of solidified silt soil, use 5 tons of sheep foot roller to roll it 6 to 8 times fo...

Embodiment 3

[0035] First dig out the silt from Taihu Lake (or other rivers, lakes and seas), and remove the lumps and sticks;

[0036] Afterwards, the sludge that does not contain lumps and sticks is piled together, and the weight percentage of its water content is 60% and close to the liquid limit by natural precipitation and evaporation of moisture.

[0037] Afterwards, put the silt with water content of 60% and close to the liquid limit into the mixer, add cement and fly ash, stir for 30 to 80 seconds, and mix evenly to obtain solidified silt soil; wherein: In the cubic meter of sludge, the addition of cement is 100kg, and the addition of fly ash is 150kg;

[0038] Afterwards, pile the solidified silt for 2 to 3 days to allow it to continue to solidify. When it has early strength and can be paved mechanically, it can be paved in layers on low-lying ground;

[0039] After paving each layer of solidified silt soil, use 5 tons of sheep foot roller to roll it 6 to 8 times for compaction ...

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PUM

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Abstract

The invention discloses a construction method of solidifying soil with sludge, concretely relates to a construction method of laying road, building levee or stuffing mulde with sludge. The method has the following steps: (1) dehydrating sludge dug, making its moisture content being 40%-60% by weight and approaching liquid limit; (2) adding cement and coal ash into dehydrated sludge; wherein: 50-100kg cement and 50-150kg coal ash per cubic meter; (3) stirring for intimate mixing for 30-80s, to get solidified sludge soil; (4) stacking the solidified sludge soil for 2-3 days, to make the soil go on with solidifying reaction, when the soil having early strength and being laid with machines, stratifing the soil and lying it on roadbed, levee and mulde, rolling it with machines. The method can save farmland, avoid environmental pollution.

Description

(1) Technical field [0001] The invention relates to an engineering construction method. Specifically, it is a construction method that uses silt to pave roads, build embankments or fill low-lying land. (2) Background technology [0002] As we all know, there are a lot of silt deposited in rivers, lakes and seas. If dredging is not carried out, the river bed will continue to rise, thereby reducing its water storage and flood resistance capabilities. According to statistics, only Wuxi City needs to dredge more than 2 million cubic meters of river silt every year. How to deal with so much dredged silt has become a major problem for the water conservancy department. The traditional method is to dump the dredged silt nearby. Using the nearest landfill can solve the problem of dredging silt disposal, but it will occupy a large amount of cultivated land and pollute the environment. (3) Contents of the invention [0003] The problem to be solved by the present invention is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14C04B18/30C04B18/08C04B24/38
CPCY02W30/91
Inventor 满志清
Owner JIANGSU JUHUI TECH
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