JPH01174717A - Device for improving earth by use of electrolysis of underground water - Google Patents

Abstract

PURPOSE:To shorten the time required for improving the earth by forming electroconductive films inside and outside of tubes made of an insulator, and by burring the tubes in a bundle in the earth while applying a voltage to the tubes so as to electrolyzing underground water. CONSTITUTION:Electroconductive metal is plated on the inner and outer surfaces of thin tubes 1 made of an insulator such as plastic or the like, and these tubes 1 are then bundled and secured to a holder 5. A ring-like electrode 9 is inserted in each of the tubes 1 which are then piled vertically in the earth down to a predetermined depth. Further electric current is applied to the plating layers inside and outside of the tubes 1 so as to electrolyze underground water which is therefore pumped up with the use of the bubble lift of the water due to the buoyancy of generated gas, the capillary action or the like.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention is for improving the ground by pumping out moisture from the ground that contains a large amount of water underground, such as on the coast or in wetlands. The purpose of this method is to provide a device that is faster than the previous method and can pump up water deep underground.

(b) Conventional technology The methods currently in practical use are the sand pile method, in which pillars of sand are buried in the ground, or paper is rolled up and buried in the ground, in order to remove water from the ground using capillary action. Paper drain method is common. However, this construction method does not actively pump water, and even if soil is placed on top and a load is applied, it takes a considerable amount of time to remove the water.

(c) Problems that the invention seeks to solve: sand piles;
Together with the paper drain method.

It takes quite a long time to remove the water.

When trying to shorten the construction process, this ground improvement often becomes a bottleneck, making it impossible to shorten the construction process by 9 hours. In addition, as structures above ground have grown larger in recent years, if the water was not drained deep underground, the upper structures would tend to tilt over the course of two years.

However, by adopting the method according to the present invention, the construction process can be shortened and the ground can be improved deep underground.

(d) Means for Solving the Problems The present invention attempts to solve these problems by electrolyzing moisture in the ground and extracting it as a gas.

At this time, it is not advisable to decompose all the water considering the power required, and in order to use it in conjunction with the conventional pumping by capillary action, we bundle small tubes and conductive on the inner, outer, or both sides. By forming a thin film and passing electricity through it, bubbles are generated and at the same time the water above the bubbles can be pumped out to the ground.

Of course, if the groundwater level becomes very low, the ability to pump water will be reduced and a higher proportion will be emitted as electrolyzed gases.

A concrete example of the present invention is 1. To explain the details using an example, the inner and outer surfaces of a thin non-conductive plastic tube are plated with conductive metal, and this tube (1
) are bundled together and fixed at the upper end to a holder (5) made of a conductive material.

Also, water can easily flow into the tube.

Make many small holes in the tube.

A ring-shaped electrode (9) is inserted into contact with the inner surface of each tube, so that a direct current voltage can be applied between the electrode and the holder, and the bundle of tubes is placed on the ground to be improved. Groundwater enters the tube through the openings on the side and bottom of the tube, which are vertically driven to a depth of , and is filled with water to the level of the groundwater level. When an electric current is applied to the plating layer inside and outside the tube, groundwater generally contains electrolytes, and seawater in particular contains sufficient amounts, and electricity flows between the inside and outside of the tube, causing electrolysis.

Gases such as hydrogen, oxygen, and chlorine are generated.

Gas is generated on all surfaces inside and outside the tube, but it gathers to form large bubbles, which rise together with the water and escape from the top end.The same goes for the outside of the tube, as the bubbles push water through the narrow gap formed by the tube bundle. It rises and is discharged to the outside.

When the groundwater level becomes very low, the efficiency of water drainage becomes poor even when soil is placed on the ground surface and a load is placed on it, but it forms bubbles and drains water to the outside, albeit in a small amount. comes out in the form of a gas, so as long as the tube is submerged in water, underground water can be drained.

Other methods include sequentially inserting multiple tubes with different diameters to make a single thick tube, making a roll of film with insulating material sandwiched between them, or stacking long thin films to make a long tube.
A similar effect can be obtained by using a shaped box.

(e) Effects and Examples The results of experiments to investigate the effects of the present invention will be explained below.

For the test, we prepared a 5-meter-long pipe, filled it with soil, bundled vinyl tubes with a diameter of 1 mm inside the pipe, and inserted electric wires as electrodes into the tubes.

Also, keep it a little away from the bundle of vinyl tubes.

Another electrode was installed, and after filling the pipe with water and adding a small amount of common salt as an electrolyte, a DC voltage of 12 volts was applied between the two electrodes.

Air bubbles generated on the electrode surface inside the tube quickly collect,
While forming large bubbles and pushing up the water at the top,
It came out from the top end and the water inside the pipe could be quickly drained.

(F) Effects of the Invention By using the present invention, the time required for ground improvement can be shortened and water from deep underground can be pumped out. Theoretically, the device could drain water to the depth it was buried, as it would eventually turn into a gas.

(g) Other examples In the present invention, a conventional sand drain is used.

This does not prevent it from being used in combination with the paper drain method, just put sand in the tube.

Alternatively, there is no problem even if paper for a paper drain is inserted, and a synergistic effect with electrolysis can be expected.

In addition, the length of the tube should be a combination of long and short tubes, and there should be many holes in the tube to help water flow in. Also, if the device is made by winding a plastic film into a roll, It is also useful to provide holes or slits to aid the inflow of water.

Further, an insulating material is not necessarily required between the tube and the film serving as the electrode, and when the conductor serving as the electrode is brought into contact, the electrical polarity may be selected so as not to short-circuit.

A foaming material such as 9-soap may be injected to give strength to the generated bubbles and to efficiently remove water particularly from deep places.

If the groundwater is seawater, electrolysis produces caustic soda, which reacts with the caustic soda at low temperatures. Injecting oil or fat is also effective.

4. Additional Intermediate The present invention was filed on March 5, 1986, application number 61-0.
4'7726 "Ground improvement method by electrolysis of groundwater"
This is an invention of an apparatus for the method.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view and a view from above of a device for bundling tubes according to claim 1, showing an example of the arrangement of the tubes. FIG. 2 is a detailed sectional view of one tube. FIG. 3 shows a side view and a sectional view of an apparatus in which the film according to claim 2 is wound into a roll, and the relationship between the film and the insulating material. FIG. 4 is a detailed sectional view of the part where the electrode is attached to the film. FIG. 5 is described in claim 3. This figure shows a side view, a cross-sectional view, and a relationship between the tube and spacer seen from above of a device formed by inserting tubes of different diameters concentrically. FIG. 6 is a perspective view of an apparatus in which rectangular films according to claim 4 are stacked with an insulating material interposed therebetween. 1 is a plated tube, 2 is a bubble generated inside the tube, 3 is a bubble generated outside the tube, 4 is the ground surface, 6 is a tube holder, 6 is an electric wire, 7 is a plastic film, 8 is a conductive thin film, 9 is a ring-shaped electrode. 21 is a film provided with a conductive thin film, 22 is an insulating material, 2
3 is an electric wire, 24 is a plastic snack film, 25 is a conductive thin film, 26 is a slit, and 27 is a ground surface. 31 is a tube, 32 is a spacer, 033 is an electric wire,
34 is the slit, 36 is the ground surface. 41 is a conductive film, 42 is an insulating film, 43 is an electric wire, and 44 is the ground surface.

Claims (1)

[Claims] 1. (a) In a method of improving the ground by electrolyzing groundwater and pumping it out, (b) A thin tube is made of an insulating material such as paper or vinyl chloride, and the tube is An electrically conductive film is formed on the inner surface, outer surface, or both the inner and outer surfaces by means of plating, coating, lamination, etc. The tubes made in this way are bundled and buried vertically in the ground, and the upper end is exposed above the ground. By multiplying
Electrolyzing groundwater to generate gases such as hydrogen, oxygen, and chlorine, converting some of the water contained in the soil into gas, and taking advantage of the bubble lift of water due to the buoyancy of the gas, capillary action, etc. Device 2 for pumping out moisture from the ground to consolidate the ground and improve the ground, (a) In a construction method that improves the ground by electrolyzing groundwater and pumping out groundwater, (b) Plastic film , form a conductive film on both sides of an insulating material such as paper by plating, coating, lamination, etc., or use a spacer between films made of conductive material to prevent the inner and outer surfaces of the film from coming into contact. Or, wrap it into a roll with an insulating material for a paper drain that helps water drainage, for example, and drive it vertically into the soil to be improved with the top end above the ground, and remove the inside and outside surfaces of the conductive coating of the film. or apply a voltage to
By applying voltage between the rolls and other rolls, water contained in the ground that has entered this roll is electrolyzed and gases such as oxygen, hydrogen, and chlorine are generated, and some of the water is In addition to extracting water in the form of a gas, the water contained in the soil is discharged to the outside using bubble lift and capillary action caused by the buoyancy of the generated gas, thereby consolidating the ground.
A device for carrying out ground improvement. 3. (a) In a construction method that improves the ground by electrolyzing groundwater and pumping it out, (b) providing a conductive coating on one surface or the inner and outer surfaces of multiple tubes of different diameters or Make a tube from the conductor, sandwich a spacer or insulating material, and insert the thin tube into the thick tube in order to make a thick tube consisting of a group of concentric tubes, and drive it into the ground to be improved with the top end above the ground. , applying a voltage between tubes made of coatings or conductors, or between other tube bundles,
A portion of the water that enters the tube is electrolyzed to generate gas, and groundwater is extracted in gaseous form.
A device that consolidates the ground and improves the ground by draining water contained in the soil using bubble lift using gas buoyancy, capillary action, etc. 4. (a) In the method of improving the ground by electrolyzing groundwater and pumping it out, (b) Plating, coating, and laminating insulating plastic film, paper, etc. with a thin film that is an electrical conductor. Plastic film with a conductive thin film, paper, or strip-shaped films of conductive metal, plastic, etc. are stacked together with a spacer and an insulating material in between to form a long and narrow box shape, and this is made into a long and narrow box shape. After the upper end is exposed above ground and it is driven into the ground to be improved, a voltage is applied to the conductive thin film or conductive film to electrolyze some of the groundwater that has entered between the stacked films. This method generates gas and extracts a portion of the groundwater in gaseous form, and uses bubble lift and capillary action due to the buoyancy of the gas to drain moisture contained in the soil, compacting the ground and improving the ground. A device for tightening.