KR101588707B1

KR101588707B1 - Special terminal apparatus for chemical grouting using air

Info

Publication number: KR101588707B1
Application number: KR1020150098954A
Authority: KR
Inventors: 김연용
Original assignee: 김연용
Priority date: 2015-07-13
Filing date: 2015-07-13
Publication date: 2016-01-27

Abstract

The present invention relates to a chemical liquid grouting special tip apparatus using air, and more particularly, to a chemical liquid grouting special tip apparatus using air, in which an air injection means is connected to a dual pipe injection rod, two or more spray holes are formed around the side surface, It is possible to open and close the injection hole at the time of instantaneous mixing of the chemical liquid by air injection, homogeneous injection of the chemical liquid through the injection hole, infiltration injection in the ground, and / or injection of the chemical solution.

Description

TECHNICAL FIELD [0001] The present invention relates to a special tip apparatus for a chemical solution grouting using air,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical solution grouting apparatus, and more particularly, to a special tip apparatus for performing chemical solution grouting using air.

Chemical solution grouting is one of the methods for improving the soft ground and poor soil by injecting two or more kinds of chemicals into the perforation hole (borehole) to fill the gap of the soil layer and cracks in the soft rock layer. Is carried out before excavation work.

As a representative example of the chemical solution grouting method, as described in Korean Patent No. 10-0564368, a cement-based chemical solution is filled in a space portion between a ground casing and a Manhattan tube Next, the LW (Labiles Wasserglass) method in which the casing is removed, an injection tube is inserted into the menjette tube, and the silicate chemical solution is compressed by the injection tube to mix and discharge the respective chemical solutions through the lower end of the menjette tube A double pipe rod is installed in the ground excavation equipment and the double pipe rod is drawn out by one step so that a special rocket protrudes at the lower end of the rod and then the silicate chemical solution and the cement chemical solution are supplied through the inner and outer surfaces of the rod SGR (Space Grouting Rocket) method in which each chemical liquid is mixed and injected in a special tip apparatus, Jet nozzles capable of rotating upward can be mounted at the tip of the rod so that the jet air is jetted in the horizontal direction together with the injection material from the jet nozzle so that the jet air is crushed simultaneously with the crushing of the ground by the jet air A JSP (Jumbo Special Pile) method is known in which the soil is mixed and cured with the injection material.

Korean Patent Registration No. 10-0564368 discloses a method for solving the problems of the above-described conventional chemical grouting method, in which, prior to injecting a B-type chemical solution containing cement as a main component into the inside of a grouting rod, an A- The liquid is injected to the side of the B type liquid solution together with the compressed air through the special tip connecting piping made of the "Y" shape so that after the primary mixing of the A type liquid medicament by the compressed air, There is an advantage that the input is not deteriorated. However, since two kinds of chemical solutions are mixed before the grouting rod, the chemical solution containing the quick-setting agent is used as long as the discharge pressure of the pump or the injection pressure of the compressed air is high, There is a problem in that it is already hardened in the grouting rod or near the spray hole.

Korean Patent No. 10-0538316 discloses a method for injecting compressed air intermittently at a grouting inlet even if two types of chemical fluids are mixed before the grouting rod. In this case, There is a problem in that the valve is provided with a central control box or the like to control the valve, and there is a problem that the valve is blocked before the valve is injected into the compressed air by the chemical liquid containing the quick-setting agent.

In order to solve the problems described above, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for mixing two kinds of chemical solutions at the bottom of a perforation hole, It is an object of the present invention to provide a grouting special tip apparatus.

In order to accomplish the above object, the present invention provides a chemical solution grouting special tip apparatus, which is fastened to the lower end of a dual tube injection rod of a dual tube drug solution injecting apparatus, wherein the double tube injection rod includes: The outer chemical liquid injecting means, the outer chemical liquid injecting means, the chemical liquid injecting pipe connected to the inner chemical liquid injecting means, and the outer chemical liquid injecting pipe connected to the inner chemical liquid injecting means, And an air injection means is further fastened to at least one of the chemical solution injection pipes connected to the injection means, and the air injection means is further tightened at the lower end of the outer tube with a diameter equal to the outer diameter of the outer tube, Two or more injection holes are formed and the bottom is sealed with a chemical solution injection cap The injection hole is formed at a position distant from the lower end of the inner tube in consideration of the injection angle of the chemical solution coming from the lower end of the inner tube, and the inner side of the bottom is formed below the injection hole, And a predetermined space is formed between the upper end and the lower end so as to mix the chemical liquid.

The outer surface of the bottom of the chemical liquid mixing injection cap is integrally formed with the extended side surface and the bottom surface is curved in a streamlined shape and the spray holes are formed at four regular intervals. .

And a spray hole opening / closing means provided to open / close the spray hole by the air injection is further coupled to the inside or outside of the chemical liquid mixed injection cap, according to another aspect of the present invention.

The spray opening / closing means includes a spring seating member which is coupled to the chemical liquid mixed injection cap so as to be slidable upward and downward from the inside thereof, and protrudes from the bottom of the chemical liquid mixed injection cap; A spring mounted on the spring seating member; And a pressurizing opening / closing part located on the upper part of the spring, the pressurizing opening / closing part having a bottom surface closing the bottom of the chemical liquid mixing injection cap and a protruding side opening / closing the injection hole.

A plurality of support rods vertically attached to an upper end of the chemical solution injection cap along an inner side surface in the longitudinal direction; An outer appearance inner ring integrally formed with the support rod and inserted into the inner surface of the outer pipe; A plurality of radially formed connection rods facing the inner tube on the outer appearance inner ring; And an inner pipe outer ring integrally formed with the connecting rod and including an inner pipe outer ring inserted into the outer surface of the inner pipe, are further fastened to another aspect of the present invention.

The present invention is characterized in that an air injection means for supplying air at a predetermined pressure to a dual pipe injection rod is connected, and two or more injection holes are formed around a side surface of the external pipe to form a chemical- It is possible to open and close the injection hole at the time of instantaneous mixing of the chemical liquid by injection, homogeneous injection of the chemical liquid through the injection hole, infiltration injection in the ground, and / or injection of the chemical solution.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall conceptual view and an enlarged view of a chemical solution grouting system with a chemical solution grouting special tip apparatus according to an embodiment of the present invention. FIG.
FIG. 2 is a process diagram showing an example in which a chemical liquid grouting special tip apparatus according to an embodiment of the present invention is attached to a double tube drug solution injecting apparatus composed of a single tube.
FIG. 3 is a process drawing and an enlarged view showing an example in which a chemical liquid grouting special tip apparatus according to an embodiment of the present invention is attached to a double tube drug solution injecting apparatus formed by connecting with a multi-tube.
4 (a) is a vertical cross-sectional view showing an example in which the inner pipe spacing member is further fastened in a substantial part of FIG. 3, and FIG. 4 (b) is a horizontal cross-sectional view taken along line AA 'in FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1, the chemical solution grouting special tip apparatus includes a double tube injection rod disposed at the bottom of the perforation hole 60 of the dual tube drug solution injector 30, And is fastened in the form of a spray cap 50. As shown in Fig. 1, the fastening method is to fasten the bolts 38 with the stepped portions 36 and 58 at both ends, or to form screw threads (not shown) It may be fastened in a screw manner.

As shown in the enlarged cross-sectional view of FIG. 1, the chemical liquid mixed injection cap 50 has a diameter that is the same as the outer diameter of the outer tube 34 (terminal size) Two or more spray holes 56 are formed around the vertical side of the side surface of the side wall 52 and the bottom 52 has a sealed structure.

The bottom 52 of the chemical liquid injection cap 50 may be formed by simply inserting a plug formed of a material different from the side surface into the side 54 having the same shape as the outer tube 34 However, as shown in FIG. 1, it is preferable to form it integrally with the side surface 54.

The outer surface of the bottom 52 may have a flat structure such as the bottom of the perforation hole. However, it is preferable that the outer surface of the bottom 52 has a streamlined curved surface structure in order to reduce the friction with the material inside the perforation hole when the double- The spray holes 56 are formed at four positions at a predetermined distance H1 away from the lower end of the inner pipe 32 so as to uniformly spray the chemical solution at an angle of 90 degrees. The injection hole 56 is formed at a position spaced a certain distance H1 from the lower end of the inner pipe 32 by the injection angle of the chemical solution coming from the lower end of the inner pipe 32, 34 in order to determine the difference in the lower end distance.

1, the inner surface of the bottom 52 may be spherical or curved along the outer surface. The inner side surface forming position H2 of the bottom 52 is formed below the spray hole 56 and the amount of the chemical solution, the number of the spray holes 56 and the number of the inner pipe 32 and the lower end It is preferable to determine the distance in consideration of the difference.

As shown in FIG. 1, the double-tube injection rod includes an inner tube 32 and an outer tube 34, which are connected to the upper end of the upper tube by respective chemical liquid injecting means 31 and 33 and are hermetically fastened by predetermined fastening means 35. do.

At this time, the fastening means (35) tightly fastens the inner pipe (32) and the outer pipe (34) at the upper end (upper end) of the double pipe injection rod and air or chemical solution injected into each pipe leaks However, it is possible to use a conventional swivel itself or a modification thereof.

The air injecting means injects air into the inner pipe 32 and / or the outer pipe 34 to increase the transfer speed of the chemical liquid in each pipe and to increase the mixing speed of the chemical liquid and the flow rate of the chemical liquid through the injection hole 56 By increasing the injection pressure of the chemical solution, uniform grouting can be performed on a wider ground and the grouting speed can be increased.

The air injection means is for injecting air into at least one of the inner pipe 32 and the outer pipe 34 so that the inner pipe 32, the outer pipe 34 and the inner pipe chemical liquid injecting means 31), an external chemical liquid injecting means (33), a chemical liquid injecting pipe (22) connected to the internal chemical liquid injecting means, and a chemical liquid injecting pipe (24) connected to the external chemical liquid injecting means. 41, 42, 43, 44 may be connected. At this time, the compressed air pressure of each injected air compressor is 1 to 5 kgf / cm ² .

1, the A-type drug solution injected through the inner tube 32 is discharged to the lower end of the inner tube 32 and injected into the inner tube (not shown) Type drug solution injected between the outer tube 34 and the outer tube 34 and the mixed drug solution is radially discharged through the two or more injection holes 56 into the space 62 of the perforation hole 60, At the same time, it spreads to the ground 1 constituting the perforation hole 60 by radiation pressure. Accordingly, when the spray holes 56 are appropriately formed around the spray holes 56, homogeneous spraying of the chemical liquid through the spray holes 56 is enabled.

Although it has been described that the A-type drug solution is injected into the inner tube 32 from the top of the two-tube injection rod from above, the B-type drug solution is injected through the outer tube 34, The same goes for the description of the following embodiments.

The type A drug solution can be divided into the A1 drug solution mixed with the quick-setting solution and the A2 drug solution mixed with the complete agent, and the quick-setting and complete solution can be mixed in the mixture solution of the magnetic ion silicate and water, It can be mixed.

The quick-setting admixture may be prepared by mixing 45 to 95 parts by weight of a sulfuric acid salt and 5 to 55 parts by weight of magnesium sulfate, respectively, with a mixture of a sodium hydroxide (sodium hydrogencarbonate) and magnesium sulfate, or mixing together citric acid. The finished agent can be prepared by mixing 45 to 95 parts by weight of silica and 5 to 55 parts by weight of slaked lime with a mixture of silica (sodium silicate) and slaked lime. A specific example of this can be found in Korean Patent No. 10-1185808 of the present inventor.

The A1 chemical solution 12, the A2 chemical solution 14 and the B type chemical solution 16 described above can be put into a three-bowl stirrer, and the A1 chemical solution 12 and the A2 chemical solution 14 can be introduced into the valve 11, As shown in FIG.

FIG. 2 shows an example in which a chemical liquid grouting special tip apparatus according to an embodiment of the present invention is attached to a dual tubal fluid injection device 30 having a single tube in both the inside and outside tubes 32 and 34. The present embodiment can be applied not only to forming a perforation hole vertically to improve a shallow ground, but also to forming a shallow perforation hole at an angle like a tunnel excavation work.

First, as shown in FIG. 2 (a), the A1 liquid chemical 12 and the B liquid medicament 16 mixed with the quick-setting admixture are respectively injected into the inner pipe 32 and the outer pipe 34 of the double pipe injection rod, The pressurized air having a predetermined pressure higher than the injection pressure of the injection pump 20 is injected together by one or more of the lures 41, 42, 43, and 44, thereby entering the chemical liquid mixture injection cap 50, And is sprayed through the spray holes 56 to form the salvation layer 72 in the space 62 of the perforation hole 60 and the ground 1.

Next, as shown in FIG. 2 (b), the A2 drug solution 14 mixed with the complete drug solution instead of the A1 drug solution 12 is mixed with the B type drug solution 16 together with the air compressors 41, 42, 43, The mixed chemical solution is injected through the injection hole 56 to permeate the nitrification layer 72 through the radial pressure so that the mixed chemical solution is injected into the chemical solution injection cap 50. [ To form a complete layer 74 over a wide range (about 1 meter). At this time, the load jack 37 is loosened so that the double tube injection rod is gradually drawn to the position where the salvation layer 72 is formed, and the mixed solution is injected through the injection hole 56 so that the complete layer 74 is formed in a certain region .

By repeating the above-described process, the grouting can be performed almost continuously as shown in FIG. 2 (c), so that the construction speed can be increased.

FIG. 3 is a schematic view of a chemical liquid grouting special tip apparatus according to an embodiment of the present invention, which is attached to a dual tubal fluid injection device 30 in which both inner and outer tubes 32 and 34 are connected by a plurality of multi- . The present embodiment is applicable to a case where a perforation hole is vertically formed for deep or ground reinforcement, a double pipe injection rod made of multiple pipes is inserted and pulled out, and a connecting pipe (not shown) .

2 and 3, when the operation of the air compressor (41, 42, 43, 44) is stopped at the time of stopping the injection of the chemical liquid or the drawing of the double pipe injection rod, It is preferable that the spray opening / closing means is further fastened to the inside or outside of the chemical liquid mixed injection cap 50 as shown in the enlarged view of FIG. 3 in order to prevent the chemical liquid mixed injection cap 50 from passing through the inside Do.

3, the spray opening / closing means includes a spring seating member 53 (see FIG. 3) projected from the bottom 51 of the chemical liquid mixing injection cap 50 and slidable upward and downward from the inside of the chemical liquid mixing injection cap 50 ); A spring (55) mounted on the spring seating member; And a pressurizing opening / closing part which is located on the upper portion of the spring and has a bottom surface 57 closing the bottom of the chemical liquid injection cap and a projecting side surface 59 opening and closing the injection hole 56. 3, the protruding side surface 59 may protrude in a cylindrical shape, but may protrude from a member having various shapes (for example, a plate-like member) capable of opening and closing the injection hole 56 .

3, a hinge is attached to the upper end of each injection hole 56 to the outside of the chemical liquid mixed injection cap 50, and the hinge is provided with various opening and closing members May be rotatably attached.

3, when the operation of the air computer units 41, 42, 43, and 44 is stopped instantaneously after one step, the bottom surface 57 is raised by the spring 55 When the chemical liquid is injected into the chemical liquid mixing injection cap 50 together with the operation of the air computer systems 41, 42, 43, and 44, the injection holes 56 are closed by the projecting side surfaces 59 The spring 55 is compressed while the bottom surface 57 is pushed down, and the spray hole 56 is opened to spray the mixed chemical solution. When the pressure applied to the bottom surface 57 is lowered as in the case of stopping the injection of the chemical solution, the bottom surface 57 is moved upward by the action of the spring 55 and the injection hole 56 is blocked by the projecting side surface 59 do.

4 shows that an inner pipe separating member for allowing the inner pipe 32 to be located at the center of the outer pipe 34 can be fastened to the inner upper end of the chemical liquid mixed injection cap 50. Although this embodiment may be separately engaged with the above-described spray opening / closing means, it can be further added to the inner upper end of the chemical liquid mixing injection cap 50 provided with the spray opening / closing means as shown in the enlarged view of FIG. 5, It can be applied mainly to the case of forming a perforation hole at an angle at an angle like a tunnel excavation work and inserting a double pipe injection rod.

As shown in the vertical sectional view of FIG. 4 (a) and the horizontal sectional view of FIG. 4 (b), the upper end of the chemical liquid mixed injection cap 50 is vertically A plurality of support rods 82 attached thereto; An outer tubular inner ring 84 integrally formed with the support rod and inserted into the inner surface of the tubular outer tubular portion 34; A plurality of radially formed connection rods 86 toward the inner tube 32 on the outer ring inner ring; And an inner pipe outer ring 88 formed integrally with the connecting rod and inserted into the outer surface of the inner pipe 32. [

Here, the number of the support rods 82 is preferably 2 to 4, and the outer ring inner ring 84 may be formed as an extended cylindrical shape, and the number of the connection rods 86 is preferably 2 to 4.

The other constituent parts are not different from general chemical liquid grouting systems, so a description thereof will be omitted.

10: 3 Breakfast stirrer 20: Infusion pump
30: dual tube drug solution injecting device 31: internal drug solution injecting device
32: inner pipe 33: outer chemical liquid injection means
34: appearance 35: fastening means
36: outer step jaw 37: load jack
38: bolts 41, 42, 43, 44: air compressor
50: chemical liquid mixing injection cap 51, 52: bottom
53: spring seating member 54: side
55: spring 56:
57: bottom surface 59: protruding side
60: Perforated hole 62: Perforated hole space
72: abraded layer 74: complete layer
82: support rod 84: outer ring inner ring
86: connection rod 88: inner tube outer ring

Claims

1. A chemical liquid grouting special tip apparatus which is fastened to a lower end of a dual tube injection rod of a dual tube chemical liquid injector,
Wherein the double tube injection rod is constituted by an inner tube and an outer tube which are connected to the upper end of the upper tube by air injecting means and are hermetically sealed by predetermined fastening means,
The air injection means is further fastened to at least one of the inner tube, the outer tube, the inner tube drug solution injection means, the outer appearance drug solution injection means, the drug solution injection tube connected to the inner drug solution injection means and the drug solution injection tube connected to the outer drug solution injection means And,
A bottom portion of the outer tube has a diameter equal to the outer diameter of the outer tube and extends at a predetermined length along a side surface of the outer tube, at least two injection holes are formed in a circumferential direction perpendicular to the length of the extended side,
Wherein the injection hole is formed at a position spaced a certain distance from the lower end of the inner tube in consideration of the injection angle of the chemical solution coming from the lower end of the inner tube,
Wherein an inner side surface of the bottom is formed below the spray hole so as to form a predetermined space for mixing the chemical solution with the lower end of the inner tube.

The method according to claim 1,
The extended side surface and the bottom of the chemical liquid injection cap are integrally formed,
The outer surface of the floor is curved in a streamlined shape,
Wherein the spray holes are formed at four intervals at regular intervals.

3. The method according to claim 1 or 2,
And a spray hole opening / closing means provided to open / close the spray hole by the air injection is further coupled to the inside or outside of the chemical liquid mixed injection cap.

The method of claim 3,
Wherein the spray opening / closing means is slidably mounted on the inside of the chemical liquid injection cap so as to be slidable up and down,
A spring seating member protruding from the bottom of the chemical liquid injection cap;
A spring mounted on the spring seating member; And
And a pressurizing opening / closing unit located on the upper portion of the spring, the pressurizing opening / closing unit comprising a bottom surface closing the bottom of the chemical liquid mixing cap and a protruding side opening / closing the injection hole.

The method of claim 3,
A plurality of support rods vertically attached to an upper end of the chemical solution injection cap along an inner side surface in the longitudinal direction;
An outer appearance inner ring integrally formed with the support rod and inserted into the inner surface of the outer pipe;
A plurality of radially formed connection rods facing the inner tube on the outer appearance inner ring; And
And an inner pipe outer member formed integrally with the connecting rod and having an inner pipe outer ring inserted into an outer surface of the inner pipe, are further tightened.