CN101476319A - Curing method for fast forming crust layer on yard surface - Google Patents

Abstract

The invention relates to a solidification method for rapidly forming a hard crust on the surface of a storage yard, which involves water conservancy, water environment treatment, and a method for rapid foundation treatment of a large amount of dredged silt storage yards produced in the construction of ports and waterway projects. The invention comprises the following steps: a) mixing and stirring the silt and the solidified material, and laying the mixture on the surface of the stockyard; b) after the solidified silt to be laid is hardened, the construction personnel and the machinery are put on the surface of the hard shell, and then the mixture is Lay forward in turn until the entire yard is covered. Aiming at the problem that the strength of high moisture content silt is low after filling, construction personnel and machinery cannot enter, and it takes a long time to perform foundation reinforcement treatment, the invention proposes to manually fill the silt in a short period of time after the completion of the filling The method of quickly forming a hard shell on the surface provides an artificial construction platform for the entry of construction personnel and machinery, thereby shortening the time for foundation treatment of the entire yard.

Description

A solidification method for rapid formation of a hard crust on the surface of a stockyard

technical field

The invention relates to water conservancy, water environment treatment, and a method for rapid foundation treatment of a large number of dredged silt yards generated in the construction of ports and waterway projects. Re-use of field land.

Background technique

With the development of water conservancy, water environment management, ports, waterways and other engineering constructions, a large amount of dredged silt will inevitably be produced. Dredged silt is a kind of solid waste with high moisture content, which cannot be used directly. Usually, the land is requisitioned to set up a storage yard. Placement-based, taking up a lot of land resources. It is estimated that the annual dredging volume in Jiangsu Province reaches 50 million cubic meters, the annual dredging volume in the Pearl River Delta region reaches 80 million cubic meters, and the dredging volume of heavily polluted sediment in Taihu Lake reaches 25.12-34.48 million cubic meters. Taking Taihu Lake as an example, if all the heavily polluted sediment is dug out and stacked at a height of 3 meters, it will need to occupy an area of 8.4 to 11.5 square kilometers. With the shortage of urban and industrial and agricultural land, land acquisition has become a major bottleneck restricting water conservancy and water environment improvement projects.

The dredging of underwater silt mostly adopts suction, rake suction or pump suction, etc. The concentration of silt after dredging is usually only 15-20% (0.8-0.85 cubic meters of water in each silt). For such high moisture content silt , the bearing capacity after dredging is extremely low, and it takes several years to form a hard shell of a certain thickness on the surface. At this time, construction machinery can enter the storage yard for foundation reinforcement operations, which leads to long land occupation of the silt storage yard. This problem has seriously affected the effective use of land resources.

Contents of the invention

The present invention aims at the problem that the strength of the high-moisture content mud is low after filling, construction personnel and machinery cannot enter, and it takes a long time to carry out foundation reinforcement treatment. By artificially forming a hard crust on the surface of dredged silt, an artificial construction platform is provided for the entry of construction personnel and machinery, thereby shortening the time for the foundation treatment of the entire yard.

The present invention adopts following technical scheme for realizing above-mentioned purpose:

A kind of solidifying method that forms hard shell layer rapidly on the surface of stockyard, it is characterized in that comprising the following steps:

a) Mix and stir the silt and solidified material, and lay the mixture on the surface of the yard;

b) After the solidified silt to be laid is hardened, construction personnel and machinery go up to the surface of the hard shell layer, and then lay the mixture forward in sequence until the entire yard is covered.

For the above step a) in the present invention, an excavator is used to lay the stirred mixture on the surface of the stockyard. For the above step a) in the present invention, a mud pump is used to lay the stirred mixture on the surface of the yard. For the above step a) in the present invention, the in-situ sludge solidification machine is used to mix and stir the solidified material and the sludge in the yard, and directly form a hard shell on the surface of the sludge.

The present invention adopts above-mentioned technical scheme, has following advantages compared with prior art:

(1) A hard crust can be quickly formed: whether it is the method of mixing and stirring the sludge and the solidified material (light material) in advance and laying it on the surface of the sludge, or sprinkling the solidified material on the surface of the dredging field for in-situ mixing and stirring , can quickly form improved silt with a certain thickness and strength. The hard shell generally hardens after 1 to 2 days, that is, it has the strength to bear people and light machinery to walk safely.

(2) The artificial hard shell has stable strength, uniform properties and convenient construction. The high moisture content dredger silt and solidified material are easy to mix evenly, and the strength after improvement is stable, whether it is mixed in advance and then laid or mixed in place.

(3) Low processing cost. Regardless of whether the sludge and solidified materials are pre-cured or in-situ solidified and stirred, the cost of treatment is less than 50 yuan/m ³ , and the cost of hard crust per mu of storage yard is 1.0 to 0.5m. 16,000 yuan.

Description of drawings

Fig. 1 is the construction schematic diagram of laying with excavator 5 after mud and solidified material (lightweight material) are mixed and stirred by solidifying machine 4 earlier;

Fig. 2 is the construction schematic diagram that mud and solidified material (lightweight material) are mixed and stirred by solidifying machine 4 and then paved with mud pump 6;

Fig. 3 is a construction schematic diagram of sprinkling the solidification material 7 on the surface of the sludge first, and then using the in-situ sludge solidification machine 8 to mix and stir the sludge and the solidification material in situ.

Fig. 4 is a schematic diagram of the construction sequence of a specific hard shell layer on the surface of the storage yard according to the present invention. First lay the hard shell forward from the cofferdam, and then extend forward sequentially after the hard shell has a certain strength.

The above figures include: 1. Yard cofferdam; 2. Dredging and filling silt; 3. Solidified silt/solidified light silt (hard crust); 4. Sludge solidification machine; 5. Excavator; 6. Slurry pump; 7. Sprinkling of solidified materials; 8. In-situ sludge solidification machine; 9. Mud delivery pipeline.

Detailed ways

Example 1

A kind of curing method that quickly forms hard shell layer on the surface of stockyard, this method comprises the following steps:

(1) start the sludge curing machine 4, and mix and stir the sludge and solidified material (also can add lightweight materials such as EPS particles, crushed rubber particles, etc.);

(2) utilize excavator 5 to lay on the yard surface after stirring;

(3) After the solidified silt has hardened after laying (about 1 to 2 days), manual or light laying machinery can be driven onto the hard shell layer, and then laid forward in sequence until the entire silt yard is covered.

Example 2

A kind of curing method that quickly forms hard shell layer on the surface of stockyard, this method comprises the following steps:

(1) start the sludge curing machine 4, and mix and stir the sludge and solidified material (also can add lightweight materials such as EPS particles, crushed rubber particles, etc.);

(2) Utilize the mud pump 6 to lay on the surface of the yard after stirring;

(3) After the solidified silt is laid and hardened (about 1 to 2 days), the construction personnel can walk on the surface of the hard shell layer laid before, and then extend the mud pump mud pipe forward and lay it sequentially until the entire silt yard Paved.

Example 3

A kind of curing method that quickly forms hard shell layer on the surface of stockyard, this method comprises the following steps:

(1) manually or mechanically spread the solidified material on the surface of the mud,

(2) Utilize the in-situ sludge solidification machine 8 to mix and stir the sludge and the solidified material 7 in situ;

(3) After mixing well and waiting for the solidified sludge to harden (about 1 to 2 days), a manual or light in-situ solidification machine can be driven onto the previously laid hard shell layer, and then laid forward in sequence until the entire sludge yard is covered. .

Claims (4)

1, a kind of curing that forms crust layer on the surface, stockyard fast is characterized in that may further comprise the steps:

A) be layed in the surface, stockyard with mud and curing materials mixing stirring, and with mixture;

B) after curing sludge the to be laid sclerosis, constructor and mechanically arrive the crust layer surface is again mixed

Close material and lay forward successively, be paved with until whole stockyard.

2, the method for utilizing curing sludge to form crust layer fast on the surface, stockyard according to claim 1 is characterized in that above-mentioned steps is a) for to be laid on the surface, stockyard by excavator with mixture after being mixed.

3, the method for utilizing curing sludge to form crust layer fast on the surface, stockyard according to claim 1 is characterized in that above-mentioned steps is a) for to be laid on the surface, stockyard with slush pump with mixture after being mixed.

4, the method for utilizing curing sludge to form crust layer fast on the surface, stockyard according to claim 1, it is characterized in that above-mentioned steps a) for utilizing original position sludge solidification machine that curing materials is mixed stirring on the spot with mud in the stockyard, directly form crust layer at muck surface.

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