KR102415391B1 - Grouting injection method using a simultaneous injection device that guarantees uniformity - Google Patents

Abstract

A grouting injection method using a simultaneous injection device that guarantees uniformity according to the present invention comprises: a first step of drilling the ground and installing an injection exterior; a second step of inserting a U-shaped exterior having first and second injection tubes into the injection exterior in a state in which a plurality of packers are installed to be spaced apart from each other; a third step of installing first and second pumps at the inlets of the first and second injection pipes; a fourth step of driving the first and second pumps to inject a grouting material into the first and second injection pipes; a fifth step of measuring the driving pressures of the first and second pumps; and a sixth step of adjusting the set pressures of the first and second pumps according to the difference in driving pressures of the first and second pumps.
According to the grouting injection method using the simultaneous injection device that guarantees uniform simultaneous injection performance according to the present invention, the actual pressure of the first and second pumps is measured in the grouting injection process using the simultaneous injection device so that the first and second pumps are equal By controlling the pressure to be applied to the first and second injection tubes, the grouting material can be uniformly injected into the injection target.

Description

Grouting injection method using a simultaneous injection device that guarantees uniformity

The present invention relates to a grouting injection method using a simultaneous injection device that guarantees uniformity, and more particularly, a process of injecting a grouting material through a simultaneous injection device having a U-shaped exterior having a packer and first and second injection tubes It relates to a grouting injection method in which the grouting material can be more uniformly injected by balancing the pressure of the first and second injection pipes by controlling the pressure for each pump by grasping the difference in pressure actually measured when two pumps are driven.

The grouting method refers to a method of not only increasing the strength of the injection target but also improving the integrity, etc. by injecting grouting materials such as cement, admixture, and mortar to reinforce the tunnel, slope, or soft ground.

This grouting material is injected into the injection target through the injection pipe in a state of uniform stirring through the stirrer. In order to solve the problem that the grouting material is injected or unnecessarily hardened due to bias in the injection process, grouting using a so-called simultaneous injection device Injection method is applied.

5 is a photograph showing the structure of a conventional simultaneous injection pipe for grouting.

The grouting injection method using the simultaneous injection device according to FIG. 7 is well shown in Korean Patent No. 1030686, 'Simultaneous injection method using a simultaneous injection device consisting of a packer and a column type injection tube', a) drilling the ground (G) step; b) when the drilling operation is completed, retracting the pilot bit in a direction opposite to the drilling direction to separate the rod and the pilot bit from the injection appearance; C) inserting the tip of the U-shaped inner tube in which a plurality of packers are mounted to be spaced apart from each other to the end of the outer injection tube; D) sealing the entrance of the injection exterior with a stopper and a caulking material; E) By connecting the first and second pumps to the first and second injection tubes of the U-shaped inner tube, respectively, and supplying the injection material to the first and second injection tubes, the injection pressure of the second injection tube becomes the first As it acts as a back pressure of the injection pressure supplied to the injection pipe, it is disclosed that the injection material is simultaneously ejected to the ground at the same pressure through each compartment space.

However, according to the above technique, due to the structure in which the first and second injection pipes are extended along the longitudinal direction from the first and second pumps, a difference in the distance between the injection holes for each division and the first and second pumps occurs, so that each injection hole There is a sufficient probability that the grouting material actually injected will not be uniform.

Therefore, there is a need to develop a new and advanced grouting injection method in which the grouting material is injected using the simultaneous injection device, but the grouting material can be uniformly injected in the injection hole for each compartment more precisely and accurately.

The present invention has been devised to overcome the problems of the above technology, and the actual measurement when two pumps are driven in the process of injecting the grouting material through a simultaneous injection device having a U-shaped appearance having a packer and first and second injection tubes Its main purpose is to provide a grouting injection method that allows the grouting material to be injected more uniformly by balancing the pressure of the first and second injection pipes by grasping the difference in pressure and adjusting the pressure for each pump.

Another object of the present invention is to sequentially increase the diameter of the injection hole so as to progress from the inlet to the end of the first and second injection pipes by reflecting the separation distance from the first and second pumps.

Another object of the present invention is to process the injection hole to be formed in a direction in which the injection hole is opened in inverse proportion to the injection hole having a sequentially increased diameter.

In order to achieve the above object, the grouting injection method using the simultaneous injection device that guarantees uniformity according to the present invention, a first step of drilling the ground and installing the injection appearance; a second step of inserting a U-shaped exterior having first and second injection tubes into the injection exterior in a state in which a plurality of packers are installed to be spaced apart from each other; a third step of installing first and second pumps at the inlets of the first and second injection pipes; a fourth step of driving the first and second pumps to inject a grouting material into the first and second injection pipes; a fifth step of measuring the driving pressures of the first and second pumps; and a sixth step of adjusting the set pressures of the first and second pumps according to the difference in driving pressures of the first and second pumps.

In addition, the fifth step includes installing a plurality of pressure sensors at regular intervals along the longitudinal direction of the first and second injection pipes to determine the pressures of the plurality of pressure sensors, the sixth step is characterized in that the set pressure of the first and second pumps is adjusted according to a pressure difference between a plurality of pressure sensors on the side of the first and second injection pipes.

In addition, the packers are installed in a plurality at regular intervals along the longitudinal direction of the exterior inside the U-shaped exterior, and the first and second injection tubes are spaced at predetermined intervals along the longitudinal direction of the first and second injection tubes. The first and second packings fitted to and including a pack surrounding the first and second packings, wherein the pack is made of a waterproof cloth.

According to the grouting injection method using the simultaneous injection device that guarantees uniformity according to the present invention,

1) In the grouting injection process using the simultaneous injection device, the actual pressure of the first and second pumps is measured and the first and second pumps are controlled to provide equal pressure to the first and second injection pipes, so that the grouting material is uniformly injected into the injection target There are advantages that can be

2) After processing the diameter of the injection hole in the area farther from the 1st and 2nd pumps, the diameter of the injection hole is sequentially decreased as it approaches the 1st and 2nd pumps to ensure a uniform injection environment of grouting material in more detail. can do,

3) By forming the injection hole in the direction in which the injection hole is widened in inverse proportion to the injection hole having the sequentially increased diameter, it has the effect of compensating for the uniformly ejected grouting material from the injection hole having a smaller diameter.

delete

1 is a flowchart showing a basic process for the grouting injection method of the present invention.
2 is a perspective view showing a schematic structure of a U-shaped exterior in which a packer is installed.
Figure 3 is a cross-sectional view showing a structure in which the diameter of the injection hole passed through the packer of the present invention is sequentially decreased along the extending direction of the first and second injection tubes.
Figure 4 is a cross-sectional view illustrating a structure in which the injection hole of the present invention is formed to be widened.
5 is a photograph showing the structure of a conventional simultaneous injection pipe for grouting.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

1 is a flowchart showing a basic process for the grouting injection method of the present invention.

As can be seen from FIG. 1 , the grouting injection method of the present invention is based on a largely six-step process.

Specifically, the grouting injection method of the present invention includes the first step of drilling the ground and installing the injection exterior 10, and the first and second injection pipes 110 and 120 in a state in which a plurality of packers are installed spaced apart from each other. A second step of inserting the U-shaped exterior 100 into the injection exterior 10 and a third phase of installing the first and second pumps 310 and 320 at the inlets of the first and second injection pipes 110 and 120, and the first , a fourth step of driving the pumps 310 and 320 to inject the grouting material into the first and second injection pipes 110 and 120, and a fifth step of measuring the pressure of the first and second pumps 310 and 320, and the first, and a sixth step of adjusting the pressure for spraying the grouting material from the first and second pumps 310 and 320 according to the pressure difference between the second pumps 310 and 320 .

At this time, the first to fourth steps are similar to the grouting injection process using a known co-injection tube, which will be briefly described as follows.

The first step of the present invention is a step of drilling the ground and then installing the injection exterior 10 in the drilling hole, a tunnel or other necessary process, for example, a process of drilling the ground for slope reinforcement.

In the state that the injection exterior 10 is made of a kind of steel pipe, a ring bit (not shown) is mounted on the opposite end of the inlet, and a rod equipped with a pilot bit (not shown) is inserted inside the injection exterior 10, A perforation hole is formed in the ground by hitting with a bit such as a pilot bit and a ring bit. When the perforated hole is formed, the rod is separated from the injection exterior 10 .

In addition, the injection exterior 10 has a plurality of injection holes 11 formed at regular intervals along the length (extension) direction. Grouting injected from the injection holes 130 of the first and second injection tubes 110 and 120 to be described later. It serves as a passageway through which the ash is injected into the outer direction of the injection exterior 10 , that is, to the ground side injection target. This injection hole 11 is equipped with a non-return valve 12 , that is, a one-way valve or a screw check valve, so that the injected grouting material flows back into the injection exterior 10 . phenomenon can be prevented.

A space may be formed to protrude from the outer circumferential surface of the injection exterior 10 so as to be in close contact with the perforated hole. The spacer 30 has a triangular cross-sectional shape so that the injection exterior 10 spans the inner circumferential surface of the perforated hole to prevent the injection exterior 10 from sagging, as well as provide an injection path for the grout material.

2 is a perspective view showing a schematic structure of a U-shaped exterior in which a packer is installed.

The second step of the present invention is a process of installing the U-shaped exterior 100 in which the packer 200 is installed among the simultaneous injection devices to the injection exterior 10, and the simultaneous injection device of the present invention is a known simultaneous injection device. Similarly, it has a structure including a co-injection tube including a U-shaped exterior 100 and a packer 200 and first and second pumps 310 and 320 .

The U-shaped exterior 100 includes first and second injection tubes 110 and 120 extending in a longitudinal direction parallel to each other, and a connector connecting the ends of the first and second injection tubes 110 and 120 in a U-shape.

An expansion groove 131 is formed in the area between the packers 200 to be described later among the parts facing the outside of the first and second injection tubes 110 and 120, that is, the injection exterior 10, and the first, An injection hole 130 is formed in the area between the two packings 210 and 220 .

The expansion groove 131 provides a path for expanding the pack 230 by jetting the grouting material injected into the first and second injection tubes, and the injection hole ejects the grouting material from the U-shaped exterior 100 to the injection exterior side. provide a path

At this time, each of the expansion groove 131 and the injection hole 130 may be formed one by one in the region between the packers 200 as well as in the region between the first and second packings, but it is not necessarily limited thereto and a predetermined interval in each region. It is also possible to form a plurality of .

The packers 200 are installed in plurality at regular intervals along the length (extension) direction of the U-shaped exterior 100 and include first and second packings 210 and 220 and the pack 230 .

The first and second packings 210 and 220 have the same shape, that is, a cylindrical shape and a volume, and the first and second injection pipes 210 and 220 are formed with two holes through which they can be fitted. are spaced apart at regular intervals along the longitudinal direction of

The first and second packings 210 and 220 shake the first and second injection pipes 1101 and 20 by the injection force transmitted to the first and second injection pipes 110 and 120 by driving the first and second pumps 310 and 320, respectively. It is preferable that it is made of an elastic material so as to provide a function of absorbing the repulsive force accompanying the jetting force as well as preventing it from moving or flowing, and effectively absorbing the repulsive force.

In addition, each of the first and second packings 210 and 220 may be formed of a single unit, but is not limited thereto, and may be configured by coupling two pieces to each other.

The pack 230 surrounds the perimeter of the first and second packings 210 and 220 described above, and the pack 230 is additionally mounted around the first and second packings 210 and 220 via the tie band 240 . can do.

This pack 230 expands while accommodating the grouting material ejected from the expansion grooves 131 of the first and second injection tubes 110 and 120 to provide a function of dividing the interior of the injection exterior 100 into a specific area, It is preferably made of a tough and strong cloth or sheet material so that the grouting material does not leak to the outside during the expansion process while enduring the pressure of the grouting material ejected from the expansion grooves 131 of the first and second injection pipes 110 and 120 .

Furthermore, it is important that the pack 230 is made of a waterproof material so as not to be affected by the grouting material or moisture in the perforated hole, which will be described in more detail below.

That is, the second step of the present invention is a process of inserting the U-shaped exterior 100 installed with the plurality of packers 200 described above into the injection exterior 10 .

Thereafter, a process of sealing or sealing the inlet of the injection exterior 10 with the cap 20 may be accompanied.

The cap 20 may have various structures. For example, in a state of a stopper or a caulking material, the inlet of the injection exterior 10 may be sealed with a known sealing material.

Furthermore, it is also possible that the cap 20 is made of a caulking packer.

The caulking packer provides the function of closing the entrance of the perforation hole so that the grout material does not leak out of the perforation hole when the grout material is injected. The right material passes through the injection hole on the outer side of the injection to reach the caulking packer, and the caulking packer is expanded by the grout material to close the entrance of the drilling hole. This will be similar to the expansion process of the packer 200 described above.

The caulking packer may be made of a cloth material. Like the pack of the aforementioned packer 200, the caulking packer is preferably made of a waterproof material so that the grout material does not leak to the outside or is adversely affected by the residual moisture in the perforation hole itself, such as polyester. It may be made of a polymer synthetic resin material.

The third step of the present invention is a process of installing the first and second pumps 310 and 320 at the inlets of the first and second injection pipes 110 and 120, and the first pumps 310 at the inlets of the first injection pipe 110, It can be understood that the second pump 320 is connected and installed at the inlet of the second injection pipe 120 .

The first and second pumps 310 and 320 are connected to a stirrer for agitating the grouting material, receive the grouting material from the stirrer, and provide power for spraying the grouting material into each of the first and second injection pipes 110 and 120 .

At this time, the pressure of the first and second pumps 310 and 320 may be set in various ways depending on the grouting injection environment, but in a process such as slope reinforcement, it is set in the range of 30 to 40Kg/cm2 in terms of providing sufficient injection pressure. desirable.

In addition, the grouting material of the present invention can be applied to a variety of known grouting materials, that is, is not limited to any specific composition or component.

The fourth step of the present invention is a process of simultaneously driving the first and second pumps 310 and 320 to inject the grouting material into the first and second injection pipes 110 and 120 .

When the grouting material is injected into the first and second injection pipes 110 and 120 in this way, the first injection is performed with the structure of the first and second injection pipes 110 and 120 extending to the same diameter and length and the simultaneous pressure of the first and second pumps 310 and 320 . The pressure on the tube 110 or the second injection tube 120 is not unbalanced and the pressure is balanced, whereby the grouting material is injected through the expansion groove 131 and the pack 230 installed in each packer 200 is the same. or expand to a volume close to the same value.

As described above, as the pack 230 of each packer 200 expands, it comes into contact with the inner circumferential surface of the injection exterior 10 and has as many compartments as the number of packers 200 (in the present invention, this is referred to as a 'compartment' or 'compartment area') This occurs, and the grouting material ejected to the injection exterior 10 through the injection hole 130 after the expansion of the pack 230 may be uniformly injected into the injection hole 11 of the injection exterior 10 as well.

As mentioned above, the above-described first to fourth steps relate to a known simultaneous injection process for grouting, in which theoretically, the volume of each compartment area is set equally, and the injection of each injection exterior 10 The injection amount of the grouting material ejected into the hole 11 should be the same, but in reality, the ground component or uniformity difference disposed on the outside of the injection exterior 10, the interval due to the driving delay time of the first and second pumps 310 and 320, the first , 2 The injection pressure may be biased toward either side of the first and second injection pipes 110 and 120 due to problems such as a difference in back pressure interacting with the pumps 310 and 320 .

In order to efficiently solve this problem, the present invention is mainly characterized by including steps 5 and 6 after the first to fourth processes.

The fifth step of the present invention is a process of measuring the driving pressures of the first and second pumps 310 and 320 .

In the present invention, the 'driving pressure' should be understood to mean the pressure actually applied by the first and second pumps 310 and 320, not the 'set pressure' set in each of the first and second pumps 310 and 320 .

That is, for example, when the pressure of 35Kg/cm2 is set and driven in each of the first and second pumps 310 and 320, the actual first pump 310 has a pressure of 34.5Kg/cm2 in the first injection pipe due to the above-described problem. Although provided to 110, in the second pump 320, a pressure of 35.3Kg/cm2 may be provided to the second injection pipe 120, and as such, the pressure measured when the first and second pumps 310 and 320 are actually driven. In the present invention, it is defined as the driving pressure.

This driving pressure may be measured by a pressure gauge installed inside each of the first and second pumps 310 and 320, and further described later, by a pressure sensor mounted on one side of the first and second injection pipes 110 and 120. may be

As such, when the actual pressure of the first and second pumps 310 and 320, that is, a difference in driving pressure occurs, the characteristic of uniformly simultaneously injecting the grouting material may be lost. and a sixth step of adjusting the pressure for injecting the grouting material into the first and second injection pipes 110 and 120 in the first and second pumps 310 and 320 according to the present invention.

That is, in the sixth step, the actual pressure of the first and second pumps 310 and 320, that is, when a difference in driving pressure occurs, the pressure (specifically, set pressure) of the first and second pumps 310 and 320 to eliminate this pressure difference A process of adjusting the set pressure is provided, and the process of adjusting the set pressure is not limited to one time, but may include several fine adjustment steps while sequentially paralleling the driving pressure measuring step of the fifth step.

In summary, the grouting injection method of the present invention is caused by the difference between the set pressure and the actual pressure (driving pressure) of the first and second pumps 310 and 320 due to the various causes described above in the process of injecting the grouting material through the simultaneous injection device. As a thing that can prevent the grouting material from being non-uniformly injected, in other words, the actual pressure of the first and second pumps 310 and 320 is finely adjusted to ultimately balance the pressure (driving pressure) between the first and second pumps 310 and 320 while grouting. The ash is more uniformly ejected through the injection exterior 10 to provide a property that can be injected into the injection target.

Furthermore, the fifth step of the present invention is to install a plurality of pressure sensors (not shown) at regular intervals along the longitudinal direction of the first and second injection pipes 110 and 120 to determine the pressures of the plurality of pressure sensors. Including, correspondingly, the sixth step is the pressure for spraying the grouting material from the first and second pumps 310 and 320 according to the pressure difference of the plurality of pressure sensors on the side of the first and second injection pipes 110 and 120, that is, the set pressure. It may include the step of adjusting.

That is, in addition to measuring the driving pressure in the vicinity of the first and second pumps 310 and 320 , the pressure around the injection hole 130 of the first and second injection pipes 110 and 120 through which the actual grouting material is ejected toward the injection exterior 10 side By installing a sensor and interlocking it with the first and second pumps 310 and 320, it is possible to provide a basis for more accurately measuring the driving pressure.

In addition, in the sixth step, after dividing the pressures of the plurality of pressure sensors into the first and second injection pipes 110 and 120 , for example, the pressure of the plurality of pressure sensors on the side of the first and second injection pipes 110 and 120 is applied. After obtaining the arithmetic mean value, the set pressure of the first pump 310 or the second pump 320 may be adjusted according to the difference between the arithmetic mean values.

Of course, it is not necessarily limited to the arithmetic mean value, and the pressure of the first and second injection tubes 110 and 120 is normalized by comprehensively considering whether an abnormal peak value occurs in a specific pressure sensor of the first and second injection tubes 110 and 120 . It is also possible to apply the algorithm to

Through this, it is possible to reflect the actual driving pressure at the location where the grouting material is sprayed, which is more accurate than the driving pressure measured at the first and second pumps 310 and 320 stages, so that it is possible to achieve a more accurate and uniform spraying environment of the grouting material. to provide.

3 is a cross-sectional view showing a structure in which the diameter of the injection hole passing through the packer of the present invention is sequentially decreased along the extending direction of the first and second injection tubes.

The present invention further provides a structural solution for the injection hole 130 in addition to the pressure control step described above in order to further promote a uniform and stable injection environment of the grouting material.

Specifically, as can be seen from FIG. 3 , the injection hole 130 formed in the area between the packers 200 in each of the first and second injection tubes 110 and 120 (that is, the area between the packers divided by expansion of the pack) is a plurality of packers. A plurality of first and second injection tubes 110 and 120 are formed based on the whole to correspond to the region between 200 , and the plurality of injection holes 130 are based on the longitudinal direction of the first and second injection tubes 110 and 120 . As it progresses from the inlet side to the end side, it may have a structure in which the diameter sequentially increases.

In other words, it means that the diameter of the injection hole 130 around the end of the first and second injection tube (110, 120) is larger than that around the inlet.

That is, in a state in which a plurality of injection holes 130 are formed in the region (compartment) between the packers 200, on the premise that the number of injection holes 130 formed for each compartment is the same, the difference in diameter of these injection holes 130 is it can be said to have been

This is in consideration of the pressure transmission direction of the first and second pumps 310 and 320 connected to the inlet side of the first and second injection pipes 110 and 120, and at the initial time point when the first and second pumps 310 and 320 are operated, the inlet injection hole ( Since the pressure of the first and second pumps 310 and 320 reaches 130) first, it is possible to provide a function to prevent an increase in the amount of grouting material ejected from the inlet injection hole.

In addition, when pressure equalization occurs with the mutual back pressure of the first and second injection tubes 110 and 120 at a time point after the operation of the first and second pumps 310 and 320 has elapsed, from the end side of the first and second injection tubes 110 and 120 Since the pressure equilibrium phenomenon occurs with a time difference in the inlet side direction, and consequently, the local back pressure applied to the end side injection hole 130 may increase. The end-side injection hole 130 of the first and second injection pipes 110 and 120 is formed to have a relatively larger diameter than the inlet side in order to uniformly match the ash discharge pressure.

At this time, the difference in diameter of the injection hole 130 for each section is not an abrupt difference such as 2 times or 3 times, but setting it to increase by 5 to 20% than the entry hole 130 of the adjacent section causes an additional pressure imbalance phenomenon. It is desirable to prevent

According to this structure, the grouting material is ejected from the injection hole 130 for each section with a slight time difference, that is, the grouting material is ejected first from the injection hole 130 on the end side of the first and second injection pipes 110 and 120. Strictly speaking, it may not be simultaneous injection, but rather, the grouting material is ejected at different pressures from the injection hole 130 having the same diameter to solve the problem that the ejection amount is not uniform, resulting in uniformity and stability for the injection of the grouting material. It is possible to provide characteristics that can guarantee at the same time.

4 is a cross-sectional view illustrating a structure in which the injection hole of the present invention is formed to be widened.

In a typical injection hole 130, the diameters of the inner peripheral surface (inner surface) and the outer peripheral surface (outer surface) of the first and second injection tubes 110 and 120 are the same, that is, based on the inner and outer surfaces of the first and second injection tubes 110 and 120 . It can be predicted to extend in the vertical direction, and the injection hole according to FIG. 4 is taper from the inner circumferential surface to the outer circumferential surface of the first and second injection tubes 110 and 120, that is, takes a structure that is inclinedly wide.

This structure is particularly useful for the injection hole 130 formed in the inlet side direction rather than the end side of the first and second injection tubes 110 and 120, and is a structure that compensates for the relatively smaller diameter than the inlet-side entry hole 130. can

That is, it is formed so as to spread from the inside (inlet) to the outside (outlet) of the injection hole 130 , so that the grouting material is not properly ejected or the instantaneous pressure is increased on the inlet side of the injection hole 130 due to the reduced diameter. Of course, it provides a function of controlling the uniform ejection of the grouting material more than necessary for each injection hole 130 based on the overall standard of the injection hole 130 with a difference in diameter.

In this case, the taper angle of the injection hole 130 may be set in the range of 5 to 30 degrees with respect to the vertical line, and may be set to different taper angles for each section.

Furthermore, as can be seen from FIG. 4 , the end-side injection holes 130 of the first and second injection tubes 110 and 120 have the same diameters on the inner and outer peripheral surfaces, but injection other than the above-described end-side injection holes 130 . It is also possible to take a structure in which the ball 130 is tapered so that it opens sequentially as it progresses toward the entrance of the first and second injection tubes 110 and 120 .

For example, when a total of four sections occur, the first injection holes on the end side of the first and second injection tubes 110 and 120 are formed at a vertical angle with respect to the surface, and the second, third, and fourth injection holes are 5, It can be set to a tapered angle of 10, 15, or 20 degrees.

In this structure, the injection hole 130 with the largest diameter, that is, the injection hole 130 on the end side of the first and second injection tubes 110 and 120 has a general structure, that is, a structure in which the inner and outer diameters of the injection hole 130 are the same. Then, as it progresses from the end side of the first and second injection tubes 110 and 120 to the inlet side, the above-described taper angle is sequentially increased (sequentially widened structure) to correspond to the sequentially decreasing diameters as much as possible. It is possible to compensate for the ejection action.

As mentioned above, it is preferable that the pack 230 is made of a waterproof material and is not affected by the grouting material or moisture in the perforation hole.

That is, the pack is made of waterproof fabric (that is, the inner and outer surfaces are coated with waterproof fabric) to prevent the grouting material from leaking to the outside when the pack is inflated, as well as to prevent external moisture from flowing into the pack. It can play a role in preventing the phenomenon.
As described so far, the configuration and operation of the grouting injection method using the simultaneous injection device that guarantees uniformity according to the present invention is expressed in the above description and drawings, but this is only an example and the spirit of the present invention is not explained above. And it is not limited to the drawings, and various changes and modifications are possible without departing from the technical spirit of the present invention.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

10: injection appearance 11: injection hole
12: non-return valve 20: cap
100: U-shaped exterior 110: first injection pipe
120: second injection tube 130: injection hole
200: packer 210: first packing
220: first packing 230: pack
240: tie band 310: first pump
320: second pump

Claims (9)

As a grouting injection method using a simultaneous injection device that guarantees uniformity,
A first step of drilling the ground and installing the injection facade;
a second step of inserting a U-shaped exterior having first and second injection tubes into the injection exterior in a state in which a plurality of packers are installed to be spaced apart from each other;
a third step of installing first and second pumps at the inlets of the first and second injection pipes;
a fourth step of driving the first and second pumps to inject a grouting material into the first and second injection pipes;
a fifth step of measuring the driving pressures of the first and second pumps;
A sixth step of adjusting the set pressure of the first and second pumps according to the difference in driving pressure of the first and second pumps;
The packer is
A first installed in the U-shaped exterior at a predetermined interval along the exterior longitudinal direction in a plurality of pieces and fitted with the first and second injection tubes at predetermined intervals along the longitudinal direction of the first and second injection tubes. , 2 packing, and a pack surrounding the first and second packings,
In each of the first and second injection pipes, an expansion groove is formed in an area between the first and second packings, and an injection hole is formed in an area between the packers,
The injection hole is
Using a simultaneous injection device, characterized in that the diameter increases sequentially as it progresses from the inlet to the end of the first and second injection tubes, and is tapered from the inner peripheral surface of the first and second injection tubes toward the outer peripheral surface. Grouting injection technique. The method of claim 1,
The fifth step is
Installing a plurality of pressure sensors at regular intervals along the longitudinal direction of the first and second injection tubes to determine the pressures of the plurality of pressure sensors,
The sixth step is
A grouting injection method using a simultaneous injection device, characterized in that the set pressures of the first and second pumps are adjusted according to a pressure difference between a plurality of pressure sensors on the side of the first and second injection pipes. The method of claim 1,
The end-side injection holes of the first and second injection tubes have the same diameter on the inner peripheral surface and the outer peripheral surface,
Injection holes other than the end-side injection hole,
A grouting injection method using a simultaneous injection device, characterized in that the tapered treatment is sequentially opened as it progresses toward the inlet of the first and second injection tubes. The method of claim 1,
The pack is
Grouting injection method using a simultaneous injection device, characterized in that it is made of a waterproof cloth. delete delete delete delete delete

Images