At present, the mud water separation system is the common method for the environmental protection treatment of mudstone residue of EPB shield.
As a preferred method, a water bucket is arranged behind the second filtering device, and the water bucket is fixed with the second filtering device.
The weak combined water in plastic muck under pressure will be converted into free water outflow, which is also the basis for the author to propose the calculation of water and soil pressure.
The second fixed plate and the second extrusion main board are both provided with water holes.
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Due to the advantages of low equipment cost, small floor area of construction well, low construction cost and fast construction progress, EPB shield is increasingly used in urban subway tunnel construction.
The equipment and construction technology are very mature, and the treatment method is simple and effective.
The shield machines mainly include earth pressure balance shield and slurry balance shield.
The remaining mud rock is solid, which can be normally discarded or backfilled for reuse.
When the shield muck contains more pebbles or sand and less fine particles, the shale shaker will separate more, and the remaining mud will be filtered.
However, the biggest disadvantage of this system is the low filtration efficiency and high cost, which is not suitable for the treatment of mudstone plastic residue of EPB shield.
The improved muck excavated by the earth pressure balance shield is in the flow plastic state, with low internal friction angle and low permeability.
But the original technology needs a lot of cost investment and improvement, which is also the reason why the original technology cannot generate fast money.
Some cities have begun to treat shield muck, hoping to achieve the purpose of drying muck, normal spoil or backfill reuse, cost reduction and environmental protection.
A large amount of flow-plastic muck accumulation will also cause great safety hazards.
The purpose of the present invention is realized by the following technical scheme: a mud and soil solidification treatment device for earth pressure balance shield, which includes: a residue pressure filtration and solidification structure: including a driving mechanism, a filtering mechanism and a residue solidification barrel, which is used for pressing and filtering the residue; Drive mechanism: connected with the filter mechanism to provide power for pressing the filter residue; Filter mechanism: used to extrude and/or drain water from the residue; Residue solidification bucket: a residue container, which is used to squeeze the residue in cooperation with the filter mechanism.
The second water filter cloth is arranged between the second fixed plate and the second extrusion main board.
As a preferred method, the main hydraulic cylinder is provided with a follow-up bucket, which is connected with the first filtering device.
A large amount of waste soil needs to be stored in the waste soil disposal yard.
Although some chemical substances will remain in the residue, at least the idea is correct.
Up to now, there is no effective method to solidify the mudstones and mucks of EPB shield with many fine particles (less than 0.075mm), which can solve the problems of high safety risk of muck accumulation, high waste cost and difficult to reach the standard of environmental protection.
Before filtering, the slag storage bucket inlet is located on the wall of the slag solidification bucket between the first filtering device (when the hydraulic rod of the main hydraulic cylinder is fully retracted) and the second filtering device, and close to the first filtering device.
This method is the best for earth pressure balance shield muck treatment.
As a preferred method, the first filtering device comprises a first fixed plate, a first water filtering cloth and a first extrusion main board.
In the technical field, the present invention relates to soil dewatering, in particular to a device, system and method for curing mud and soil of earth pressure balance shield.
The purpose of the invention is to overcome the shortcomings of the existing technology and provide a device, system and treatment method for the consolidation of mud rock residue of the earth pressure balance shield.
The original invention is to directly extrude the plastic residue of the earth pressure balance shield to lose water and solidify it.
The first filtering device is arranged at the end of the driving mechanism (hydraulic rod of the main hydraulic cylinder), and the second filtering device is arranged at one side of the residue solidification barrel.
First, dilute the slag with water, separate the large particle size and sand with a vibrating screen, and filter the mud into cakes with a filter press.
The residue of the earth pressure balance shield is extruded from the plastic body into a solid.
It is reported that a safety accident of casualties occurred in a city due to the high accumulation of shield muck.
As a preferred method, the present invention also includes a slag storage hopper: arranged above the residue pressure filtration and solidification structure to collect the residue generated by the shield.
The first water filtering cloth is arranged between the first fixed plate and the first extrusion main board, and the first fixed plate and the first extrusion main board are both provided with water holes; The second filter device comprises a second fixed plate, a second water filter cloth and a second extrusion main board.
At present, the earth pressure balance shield slag solidification treatment device generally uses a slurry separation system to separate the earth pressure balance shield slag.
The mud rock in the plastic state is directly filtered under high pressure.
Generally, the muck from the earth pressure balance shield is discarded in the special waste dump.
As a preferred method, the slag storage bucket inlet is set on the slag solidification bucket.
As a preferred method, the driving mechanism includes a main hydraulic cylinder, and the hydraulic rod of the main hydraulic cylinder is connected with the first filtering device of the filtering mechanism.
As the preferred method, the number of auxiliary hydraulic cylinders is two, and the two auxiliary hydraulic cylinders are respectively installed on both sides of the slag solidification barrel.
However, there are many fine particles (less than 0.075mm) in the shield mudstone muck.
The weakly bound water in the mud rock is converted into free water under high pressure, and the free water is filtered out by pressure.
As a preferred method, the driving mechanism also includes an auxiliary hydraulic cylinder, and the hydraulic rod of the auxiliary hydraulic cylinder is connected with the second filtering device of the filtering mechanism.
The background technology shield method is widely used in metros in major cities with its advantages of safety, reliability, speed, economy and environmental protection.
The filtering efficiency of the filter press used today is low, and a large number of filter presses are required for filtering, resulting in a large area of equipment, a large number of filter presses and high construction costs.
Because the waste soil is in the flow plastic state, it is thin, the natural consolidation is very slow, and the space of the waste soil disposal yard is limited, resulting in the high cost of disposal of the waste soil of the earth pressure balance shield, which is not environmentally friendly and can not be reused.
As a preferred method, the filtering mechanism includes a first filtering device and a second filtering device.
