JP3741431B2 - Method for separating earth and sand from waste mud and waste mud separation device used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste mud separation technique for excavating the ground while stabilizing the face with mud sent to the face and separating the earth and sand from the waste mud mixed with the discharged earth and sand components.
[0002]
[Prior art]
Conventionally, in the tunneling method, propulsion method, ground improvement method, cast-in-place pile method, etc., the mud component in the mud is separated by separating the mud and the mud component mixed with the sediment and mud components generated in the face and bit hole. They are collected and sent again for reuse as drilling mud. This mud was discharged through a pipeline by a slurry pump or the like, and the earth and sand were separated by a separation device equipped with a vibrating screen mechanism such as a mud screen.
[0003]
By the way, in the conventional separation apparatus, separation is difficult when the particle size of the sediment component in the sludge is large or the viscosity is abnormally high, etc., and once crushed to a separable particle size or jet high pressure water is applied to the face. After injection, it was separated by a separation device. Therefore, the pre-process is caused by crushing or washing before separation, which is uneconomical and inefficient. In addition, there is a problem that the earth and sand components in the mud are easily clogged with the earth and sand components during the separation, and the earth and sand components are not easily separated.
[0004]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems and to use it for a method for separating sediment from waste mud that can be separated efficiently and directly without requiring any pre-treatment with any particle component of any particle size. The object is to provide a sludge separator.
[0005]
[Means for Solving the Problems]
The configuration of the present invention that solves this problem is as follows.
1) A method of excavating the ground while stabilizing the face with the mud sent to the face, and separating the earth and sand from the discharged mud mixed with the discharged earth and sand components, which can pass through the mud The above-mentioned mud is poured into a mesh culm with a mesh screen above the water storage tank, and the mesh culm with the drained mud in the same water tank is immersed in the water of the water storage tank, toward the soaked net The water stored in the water tank is sprayed as high-pressure water, and the high-pressure water is passed through the mesh screen to agitate the sludge in the screen and wash out the high-concentration mud components. Discharge into the water tank, lift the net from the water tank, discharge the sediment components with large particle size remaining in the net, and stir and separate the waste mud while suppressing clogging of the net with high-pressure water Sediment from waste mud characterized by being able to separate the sediment component by collecting the muddy component in the water tank 2) Before storing water containing muddy water components collected in the water tank as high-pressure water, the water is classified by a classifier having a mesh size smaller than that of the mesh screen, and the particles remaining in the classifier The method of separating the sediment from the waste mud described in 1) above, wherein the sediment component having a small diameter is discharged and classified and recovered, and used as high-pressure water. ) Or 2) Method for separating earth and sand from waste mud 4) Freely raising and lowering netting with a mesh size that allows muddy water components to pass through the stored water tank from the bottom of the water tank A plurality of spray nozzles that suspend and squeeze high-pressure water toward the nets are provided so as to surround the nets immersed in the reservoir, and high-pressure water supply means for supplying high-pressure water to each of the spray nozzles is provided . The high-pressure water supply means installs a submersible pump in the water tank. The water in the water tank at the same water pump to supply a predetermined pressure to each injection nozzle, the cyclically is obtained by way use the waste sludge separator 5) water storage was the water tank the water storage for the high pressure water A net with a sieve with a size that allows muddy water components to pass through it is suspended from the bottom of the water storage tank at a predetermined interval so that it can be freely hung, and an injection nozzle that injects high-pressure water toward the net is immersed in the water. A plurality of high-pressure water supply means for supplying high-pressure water to each of the spray nozzles is provided, and a classifier having a mesh size smaller than that of the mesh screen is provided to classify the muddy water in the water tank. Sewage and sand components with a small particle size are further separated and removed by a classifier, and the fine particle size mud water classified by the classifier is sent to high-pressure water supply means so that it can be used for high-pressure water. A classifier with a mesh size smaller than , The muddy water in the water tank is classified with a classifier to further separate and remove the sediment components with a small particle size, and the finely divided mud water classified by the classifier is sent to the high-pressure water supply means so that it can be used for high-pressure water. wherein providing the vibrator for vibrating the 4) Symbol mounting of the exhaust mud separation apparatus 7) Amikago 4) to 6) in the exhaust mud separation apparatus of any one.
[0006]
[Action]
According to the present invention, the mud discharged by excavation is directly put into the net cage, suspended in a water tank in which the net cage is stored at a predetermined water level, and immersed at a predetermined interval from the bottom surface thereof, By jetting high-pressure water toward the outer surface of the net, the mud component separates from the mesh screen while the mud in the net is agitated with the force of high-pressure water and the mud component is separated. It is collected at the bottom of the water tank. Therefore, any soil component having any particle size can be directly separated as long as it can be put into the net, and the conventional pre-process is not required. In addition, the mesh screen is not easily clogged with high-pressure water and is efficiently separated in a short time. Furthermore, since high-pressure water uses the water stored in the water tank cyclically, the amount of industrial waste discharged is significantly reduced.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
As the mesh cage of the present invention, a metal mesh or punching metal having a mesh size of about 10 to 20 mm is used, and the outer surface is reinforced with a grid-like reinforcement frame in order to maintain the strength against the impact at the time of discharging mud. Is desirable. This net is hanged up and down by a hoist or the like in a water storage tank.
[0008]
A submersible pump is installed in the water storage tank, and the water stored in the water storage tank is directly injected into the reed. By reusing the water for injection cyclically, there is no need for an external water supply facility. Become. The sludge that is transported in the pipeline may be thrown directly into the net, but if a waste mud tank with a separate chute is provided, the amount of sludge that corresponds to the separation capacity is treated. The whole process can be made smooth, which is preferable.
[0009]
When the sediment is left on the deck with a predetermined height so that the height of the net cage is about the same as the loading platform of the dump truck so that the sediment component remaining in the mesh basket after separation and collection can be easily carried out by the dump truck. Good. Embodiments of the present invention will be specifically described below with reference to the drawings.
[0010]
【Example】
The embodiment shown in FIGS. 1 to 8 is an example of a waste mud separation device that separates waste mud discharged by the propulsion method outside the mine and a waste mud separation treatment using the same. FIG. 1 is a schematic view of a waste mud treatment facility of the embodiment, FIG. 2 is a partially cutaway side view of the waste mud separation device of the embodiment, FIG. 3 is a plan view of the waste mud separation device of the embodiment, and FIG. A-A sectional view, FIG. 5 is a BB sectional view of FIG. 2, FIG. 6 is an enlarged plan view of the waste mud separation device of the embodiment, and FIGS. 7 and 8 are explanatory views showing the waste mud separation processing of the embodiment. It is.
[0011]
In the figure, 1 is an excavator, 2 is a propulsion pipe, 3 is a mud separator, 4 is a deck, 5 is a mud tank, 5a is a chute, 5b is a mud pipe, 6 is a fresh water tank, 7 is a water tank, 7a is a sand pump, 8 is a submersible pump, 8a is an injection nozzle, 8b is a high-pressure water pipe, 9 is a suspension device, 9a is a rail, 9b is a support, 9c is a hoist, 10 is a net, 11 is a mud screen, 11a Is a chute, 12 is a mud feeding plant, D is a dump truck, G is ground, Ga is mud, Gb is a mud component, Gc is a sediment component, and W is water.
[0012]
As shown in FIGS. 2 to 6, the waste mud separation device tilts a waste mud tank 5 having a chute 5 a that can be folded above a deck 4 having a substantially loading platform height of the dump truck D so that the chute 5 a side faces downward. A 12m3 fresh water tank 6 and a water tank 7 partitioned into two spaces are provided below the deck 4, and a sand pump 7a and a submersible pump 8 are provided in each section of the water tank 7, respectively. From the high pressure water pipe 8b, six injection nozzles 8a are horizontally attached from the high pressure water pipe 8b to the center side.
[0013]
A hoisting device 9 in which a hoist 9c is movably attached by installing a rail 9a between the upper ends of the columns 9b above the opening of the water storage tank 7 is installed, and a wire mesh made of stainless steel formed on the hoist 9c at intervals of 10 mm by wires. A screen 10 having a width of 1300 mm, a depth of 1000 mm, and a depth of 600 mm, the outer surface of which is reinforced by a grid-like reinforcing frame, is suspended, a mud screen 11 having a vibration sieve mechanism is provided on the side of the hanging device 9, and a sand pump 7a Thus, muddy water can be supplied to the mud screen 11.
[0014]
In this embodiment, after the initial water is fed and the mud produced in the mud feeding plant 12 is pumped to the tip of the excavator 1, the mud water is dug while stabilizing the face surface, and the sand G of the excavated ground G The sludge-like waste mud Ga in which soil and sand components such as stone, viscosity, silt, etc. and mud components are mixed is discharged. To temporarily store mud.
[0015]
In the waste mud separation device 3, as shown in FIG. 7 (a), water W is supplied from the fresh water tank 6 adjacent to the water tank 7 to store about 60%, and the water tank 7 is suspended by a hoist 9c. The net 10 is lowered and the outer bottom surface of the net 10 is immersed from the inner bottom of the water tank 7 at a predetermined interval, and the chute 5a of the mud tank 5 is pulled out as shown in FIG. The required amount of sludge Ga in 5 is put into the net 10.
[0016]
Next, the submersible pump 8 is operated to supply the water W in the water storage tank 7 to each injection nozzle 8a through the high-pressure water pipe 8b at a predetermined pressure. As shown in FIG. 7C, the high-pressure water is supplied from each injection nozzle 8a. Is sprayed toward the net 10. The waste mud Ga is agitated in the net 10 by the high-pressure water jet force, and the mud component Gb in the exhaust mud oozes from the mesh of the net 10 and settles on the bottom of the water storage tank 7.
[0017]
The injection of high pressure water 1 m ^3/5 min (200 l / min) completed substantially stirred and separated by continuing only sediment component Gc remains in the Amikago 10 as shown in FIG. After that, the mesh basket 10 is lifted by the hoist 9c and moved to the upper side of the dump truck D loading platform placed on the side surface of the sludge separation device 3, the mesh basket 10 is inverted, and the sediment component Gc inside is dropped on the loading platform. It is landfilled at a predetermined place.
[0018]
The muddy water component Gb precipitated at the bottom of the water storage tank 7 is transported to the mud screen 11 on the deck 4 by the sand pump 7a, and subjected to secondary separation processing to a fine particle size by the vibrating screen of the mud screen 11. The components remaining on the screen after the secondary separation are dropped onto the loading platform of the dump truck D in the same manner as described above, and the components that have passed through the screen are returned to the water tank 7 on the submersible pump 8 side as high-pressure water. used.
[0019]
The mud component Gb settled on the bottom of the water storage tank 7 gradually increases in specific gravity and the viscosity is improved. The mud component Gb is recovered and transferred to the mud feeding plant 12 where mud for excavation is collected. It is manufactured and pumped again to the tip of the excavator 1, and the reduced amount of the water W in the water storage tank 7 supplements the necessary amount from the adjacent fresh water tank 6. By repeating the above steps, the waste mud Ga is separated and recovered and reused cyclically.
[0020]
【The invention's effect】
As described above, according to the present invention, any particle component having any particle size can be directly separated as long as it can be put into the net, and the conventional pre-process is not required. It is difficult to be clogged with water and can be separated and recovered efficiently in a short time. Moreover, high pressure water can remarkably reduce the amount of industrial waste discharged by using the water stored in the water tank cyclically. In addition to mud material, it can be used for tail void material, muddy water that is sent to the tip of a drilling machine bit when improving the ground, and muddy water for drilling when cast in place. It can be made possible.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a waste mud treatment facility according to an embodiment.
FIG. 2 is a partially cutaway side view of the waste mud separation device of the embodiment.
FIG. 3 is a plan view of the waste mud separation device of the embodiment.
4 is a cross-sectional view taken along the line AA in FIG.
5 is a cross-sectional view taken along the line BB in FIG.
FIG. 6 is an enlarged plan view of the waste mud separation device of the embodiment.
FIG. 7 is an explanatory diagram showing a waste mud separation process of an example.
FIG. 8 is an explanatory view showing waste mud separation processing of an example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Excavator 2 Propulsion pipe 3 Waste mud separator 4 Deck 5 Waste mud tank 5a Chute 5b Waste mud pipe 6 Fresh water tank 7 Water tank 7a Sand pump 8 Submersible pump 8a Injection nozzle 8b High pressure water pipe 9 Suspension device 9a Rail 9b Post 9c Hoist 10 Net fence 11 Mud screen 11a Chute 12 Mud sending plant G Ground Ga Waste mud Gb Mud component Gc Earth and sand component W Water

Claims (7)

  This is a method of excavating the ground while stabilizing the face with the mud sent to the face, and separating the earth and sand from the waste mud mixed with the discharged earth and sand components, and the size of the mud water components can pass through. The waste mud is poured into a mesh culvert having a sieve mesh above the water storage tank, the mesh culm with the mud drained in the water storage tank is immersed in the water of the water storage tank, and the water is stored toward the soaked net fence. The water storage tank outside the net is washed out by spraying the water in the tank as high-pressure water and passing the same high-pressure water through the mesh screen to stir the waste mud in the net. Discharge into the tank, lift the net from the water tank, discharge the sediment component with a large particle size remaining in the net, and stir and separate the waste mud while suppressing clogging of the net with high-pressure water. The sediment is separated from the mud, which is characterized in that the sediment component can be separated by collecting the soil in the water tank. How to.   Before the water containing the mud component collected in the water tank is jetted as high-pressure water, it is classified with a classifier having a mesh size smaller than that of the mesh screen, and the small sand particle component remaining in the classifier is collected. The method for separating earth and sand from waste mud according to claim 1, wherein the mud component discharged, classified and recovered is used as high-pressure water.   The method for separating earth and sand from waste mud according to claim 1 or 2, wherein the separation is promoted by vibrating the screen. An injection nozzle that injects high-pressure water toward the net by suspending a net with a screen with a size that allows mud components to pass through the stored water tank. A plurality of nets are provided so as to surround the net cage immersed in the water storage , and high pressure water supply means for supplying high pressure water to each of the injection nozzles is provided , and the high pressure water supply means is provided with a submersible pump in the water storage tank. A waste mud separation device in which water stored in a water storage tank is supplied to each injection nozzle at a predetermined water pressure by a pump, and the stored water is used cyclically for high-pressure water . An injection nozzle that injects high-pressure water toward the net by suspending a net with a screen with a size that allows mud components to pass through the stored water tank. A plurality of soots are provided so as to surround the nets immersed in the water storage, high-pressure water supply means for supplying high-pressure water to each of the spray nozzles is provided, and a classifier having a mesh smaller than that of the nets is provided. Muddy water in the tank is classified with a classifier to further separate and remove the sediment components with a small particle size, and the fine muddy water classified by the classifier is sent to the high-pressure water supply means so that it can be used for high-pressure water. Separation device. A classifier with a mesh size smaller than that of the mesh screen is provided, and the muddy water in the water storage tank is classified with a classifier to further separate and remove the earth and sand components having a small particle size. Hydro separation device was to be used in high-pressure water is sent to the high-pressure water supply means according to claim 4 Symbol mounting.   The waste mud separation device according to any one of claims 4 to 6, further comprising a vibration exciter for vibrating the screen.

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