KR101045727B1 - A multistaged equipment of pipe grouting by double packer system and its constructing method - Google Patents

Abstract

PURPOSE: A multistage grouting apparatus of a steel pipe using a double packer method and a construction method thereof are provided to reinforce the ground by properly installing packers depending on ground conditions. CONSTITUTION: A multistage grouting apparatus of a steel pipe using a double packer method comprises a steel pipe(200), a shoe(300), first and second packers(400,500), a steel rod(600), and first and second grouting material injection hoses(700,800). Multiple grouting material ejecting holes are formed in the steel pipe. The shoe is installed in the inner end of the steel pipe. The first packer is formed in a bag shape to be filled with a grouting material. The steel rod is inserted into the steel pipe. The second packer is fixed to the outer surface of the steel rod and is inserted into the steel pipe. The first grouting material injection hose injects the grouting material into the first packer. The second grouting material injection hose injects the grouting material into the steel pipe.

Description

A multistaged equipment of pipe grouting by double packer system and its constructing method}

The present invention relates to a steel pipe multi-stage grouting apparatus of the double packer method and a construction method thereof, and more specifically, a conventional steel pipe multi-stage grouting apparatus and construction method for ensuring the stability of the excavation and cutting surface for securing a tunnel or underground space Compared to grouting the surrounding ground as well as multi-stage by forming a packer inside and outside the steel pipe installed inside the drilled hole, the effect of nail can be exerted simultaneously by the steel bar formed inside the steel pipe. The present invention relates to a double packer steel pipe multi-stage grouting device for improving the durability and greatly improving workability of a grouting device and a construction method thereof.

As the industry developed, the necessity for logistics movement gradually increased, and as a result, construction for logistics movement means such as new roads and railways was actively progressed. For this reason, the underground excavation of tunnels, incisions, etc., along with the stability of this problem became essential during construction for new logistics movement means.

In recent years, utilization plans to secure various types of underground spaces such as water tunnels and storage tanks to prevent disasters caused by water such as floods are being established or pursued. This is required.

In general, the underground space is secured by excavating the ground composed of soil or rock. At this time, if the ground constituting the excavation surface is not stable, there is a risk of collapse, and the excavation cannot proceed. I can load it. Therefore, when excavating underground spaces, reinforcement and reinforcement are required in various ways to stabilize the underground space. Nailing method, rock bolt, anchor, steel pipe multi-stage grouting, etc. are used as such methods.

When planning underground spaces, such as tunnels, if possible, try to locate rocky ground.

However, it is almost impossible to select an area where the ground where the underground structures such as tunnels are located is made of high quality rock.

If the ground where the excavation of the underground space is scheduled to have a lot of soil, weathering, or joints, stratification, crushing zone is developed, and the rock quality is poor, the excavation may be excessively deformed or collapsed during excavation. do.

If the excavation ground is not good, reinforcing method is mainly rock bolt, nailing, anchor or steel pipe multi-stage grouting method.

For example, the tunnel construction is to be applied to the underground space reinforcement method, especially when the tunnel construction is the most exposed to the danger of collapse during the excavation tunnel upper part.

In the case of reinforcing the upper part of the tunnel, when applying the above-mentioned methods, the grout is reversed when grouting between the reinforcing material and the drilling hole because the end of the reinforcing part needs to install the reinforcing hole upward from the excavating surface unlike the general cut slope. There is a problem.

To solve this problem, packers are used to prevent backflow of grout.

On the other hand, when the ground reinforcement requires the grouting effect around the tunnel wall as well as the reinforcement by the reinforcing material inserted into the drill hole, the steel pipe multi-stage grouting method is implemented.

In general, steel pipe multi-stage grouting is a method of grouting in multiple stages by moving the packer by installing a packer inside the steel pipe placed in the hole and blocking the hole in the hole after drilling.

However, this method is difficult to control the grouting of the outside of the drill hole as long as the construction time is long and grouting while moving the packer inside the steel pipe, and there is a limit to the strength of one steel pipe to improve it This is being created.

As a method for speeding up grouting, there is a simultaneous grout injection device using a packer and a U-turn injection tube of Korean Patent No. 10-0918681, and a simultaneous multistage injection tube of grout material of Korean Patent No. 10-0643508 and the same The multi-stage grouting method used is introduced.

The advantages of simultaneously performing multi-stage grouting or making grouting easier have the advantage of facilitating construction, but there is a limitation that the effect of enhancing the strength of reinforcing pipes cannot be fundamentally limited.

Meanwhile, in 1999, a method of replacing the steel pipe itself with a glass fiber reinforced plastic (FRP) pipe (Korean Patent No. 10-0331969, a multi-stage grouting device and a method using a glass fiber reinforced plastic injection tube) was developed.

Fundamentally, the multi-stage grouting method is a method in which the grouting effect of the surrounding ground and the resistance of the injected steel pipe are mainly represented as reinforcing effects.

Many of the existing improved methods focus on facilitating grouting, which has the effect of improving the ease of construction, but the effect on the reinforcing effect of the multi-stage grouting method is limited or insignificant compared to the existing method. There may be a large number, and in particular, if the ground in the drill hole is varied so that the conditions of grouting should be different, there may be a problem in that it is not easy to adjust.

Generally, the steel pipe installed in the drilling hole in the steel pipe multi-stage grouting method is placed at the bottom of the drilling hole, and the grout material is grouted through the inside of the steel pipe because the seal material mixed with cement and bentonite is filled between the steel pipe and the drilling hole. It penetrates the seal and then diffuses into the surrounding ground.

Due to this work process, the hole is different from the hole and the steel pipe in the hole, and thus the thickness of the sealing material is different. Therefore, when grouting penetrates the ground through the sealing material during grouting, it may not be uniformly constructed. When the steel pipe directly touches the floor, the grouting effect at the bottom of the drilled hole is relatively lower than that of the upper or side portion during grouting, which reduces the ground reinforcing effect at the bottom of the drilled hole, which results in the applicability of the steel pipe multi-stage grouting. It can also cause a drop.

On the other hand, most of the steel pipe multi-stage grouting method prevents the sealing material from flowing into the steel pipe when the sealing material is inserted by blocking the end of the steel pipe that is inserted into the drilling hole, but it is difficult to expect the grouting effect outside the end of the drilling hole. If the grouting of the end of the drilling hole is necessary, there is a problem that the drilling should be deeper.

Therefore, a method for more effectively strengthening and economically implementing the steel pipe multi-stage grouting method is required.

The present invention has been made in order to solve the above problems, and since the ground is not homogeneous from the outside of the wall to the depth required for reinforcement, the area to strengthen the ground by grouting also has to be different depending on the ground conditions, effectively grouting In order to implement, it is necessary to subdivide the grouting area, and to set grouting area by using the packer outside the steel pipe at appropriately divided intervals to effectively grout the ground around the perforated hole where reinforcement is required, the packer is installed in the steel pipe. The first purpose is to make grouting effective for each area by using a.

In addition, the packer to be installed in the steel pipe must be manufactured and fixed to be able to withstand the grouting pressure sufficiently and to have an excellent sealing effect, and to easily change the installation position of the packer body when necessary, and to prevent the collapse of the wall in the multi-stage grouting method. Since the greatest role of suppression is grouting and shearing or activity resistance by steel pipes, the second purpose is to increase stability by strengthening resistance to activity or fracture of steel pipes as a result.

When the steel pipe is disposed in the perforation hole, the third purpose is to allow the grouting material to flow out from the steel pipe to be easily diffused to the surrounding ground only when the steel pipe is properly dropped from the bottom of the perforation hole.

On the other hand, in order to increase workability and grouting effect and economical construction, it is necessary to divide grouting from the inside of the steel pipe in multiple stages, but not to use the sealing material to fill the hole between the perforated hole and the steel pipe. Or it is necessary to easily grout at different pressures at the same time to separate the grouting area in multiple stages, but the fourth purpose is to grout at the same time.

In order to effectively grout the ground of the end of the drilling hole and to facilitate the introduction of the steel pipe into the drilling hole, a shoe is installed at the end of the steel pipe, and a grouting hole is installed at the front of the shoe to grout through the steel pipe. The fifth purpose is to expand the area of grouting to the outside of the end of the drilling hole by effectively grouting to the outside of the end of the drilling hole.

It will be described in more detail the problem solving means of the present invention for achieving the above object.

In the double packer steel pipe multi-stage grouting device,

Steel pipe 200 through which a plurality of grouting material injection hole 210 is formed on the side wall,

One side is formed with a steel pipe connecting portion 310 is fitted to the steel pipe 200, the other side is formed with an entrance 320 is a shoe 300 which is installed at the inner end of the steel pipe 200;

Being installed on the outside of the steel pipe 200, the outer end is bound as a high-tight sealing opening 410, the inner end is bound as a mobile sealing opening 420 so as to slide on the outer surface of the steel pipe 200, A first packer 400 formed in a bag shape to fill the grouting material therein;

A second packer 500 fixedly formed on an outer surface of the steel rod 600 inserted into the steel pipe 200 to be fitted inside the steel pipe 200;

A first grouting material injection hose 700 formed on an outer surface of the steel pipe 200 to transport and grout the grouting material to the first packer 500;

A second grouting material injection hose 800 formed in the steel pipe 200 to inject a grouting material into the steel pipe 200;

.

The shoe 300 is characterized in that it consists of a steel pipe connecting portion 310 is fitted in the longitudinal direction to the end of the steel pipe 200, and the entry portion 320 formed on the other side of the steel pipe connecting portion (310).

A pair of steel pipe fixing holes 311 are formed in the steel pipe connecting portion 310 of the shoe 300 to be symmetrical with each other, and the steel pipe 200 into which the steel pipe connecting portion 310 of the shoe 300 is fitted. At the end, a bolt through hole 220 corresponding to the steel pipe fixing hole 311 is formed.

The shoe grouting material injection hole 321 is formed in the entrance part 320 of the shoe 300.

The outer portion 401 of the first packer 400 is a tight cloth or waterproof cloth, and the inner portion 405 is made of a loose cloth or a permeable cloth, between the rapid expansion material 402, porous fibers ( 403, the lime powder 404 is a cloth containing is characterized in that it is formed in a bag shape.

The high-tightness opening 410 of the first packer is formed with a steel pipe through-hole 411 through which the steel pipe 200 penetrates at one center thereof, and a first grouting material injection hose 700 penetrates at the other center thereof. 1 grouting material injection hose through hole 412 is formed, the steel pipe through hole 411 and the first grouting material injection hose through hole 412 the inner wall surface of the steel pipe through hole 411 and the first grouting material injection A fixing protrusion 413 for preventing movement of the hose 700 is formed, and a fixing groove A 414 for preventing separation of the fixing band 430 is formed on the outer circumferential surface thereof.

The mobile seal 420 of the first packer has a steel pipe through-hole 421 through which the steel pipe 200 penetrates at one center thereof, and a first grouting material injection hose 700 penetrates at the other center thereof. 1 grouting material injection hose through-hole 422 is formed, the outer peripheral surface is characterized in that the fixing groove B (423) for preventing the separation of the fixing band 430 is formed.

The high hermetic seal 410 of the first packer 400 is cut to the same size as the number of through holes 411 and 412 formed through the center, the center of each through hole 411, 412 is It is characterized by being made of cut pieces are fixed with a fixing band 430.

The moving sealing opening 420 of the first packer 400, the center of the steel pipe through-hole 421 and the first grouting material injection hose through-hole 422 is formed to be symmetrically cut symmetrically cut band 430 It is characterized by being fixed to).

The second packer 500 has a steel rod through-hole 510 through which the steel rod 600 penetrates at one side of the center, and a second grouting material injection hose 800 through which the second grouting material injection hose 800 penetrates at the other center. The hose through hole 520 is characterized in that it is formed.

The second packer 500 is made of pieces cut into the same size by the number of the steel rod through hole 510 and the second grouting material injection hose through hole 520 formed in the center, each through hole ( The centers of 510 and 520 are cut symmetrically from each other.

The second packer 500 is fixed to the outer surface of the steel bar 600 which is introduced into the steel pipe 200 at regular intervals, so that the number of the second packer 500 inside the steel pipe 200, the multi-stage sealed room Forming 230, it is characterized in that the grouting material injection pressure of each closed chamber 230 can vary depending on the characteristics of the surrounding ground.

The steel rod 600 is characterized in that it can be replaced with one of the reinforced plastic rod, glass fiber reinforced plastic rods.

The steel rod 600 is characterized in that the wire rope or glass fiber rope is formed integrally wound on one of the reinforced plastic rod or glass fiber reinforced plastic rod.

The steel rod 600 is characterized in that it can be replaced with one of a steel pipe, reinforced plastic pipe, glass fiber reinforced plastic pipe.

On the other hand, from the inlet portion to the inner portion of the punching hole 100, the fixed seal 410 and the movable sealed hole 420 of the first packer 400 formed in a predetermined number in the steel pipe 200, the steel pipe It is wrapped with a certain thickness on the outer surface of the 200, characterized in that the steel pipe 200 is formed of a spacer to be located in the center of the drilling hole (100).

When presenting another solution of the present invention for achieving the above object,

The present invention is a double packer steel pipe multi-stage grouting method,

After the first packer 400 is formed on the outer surface of the steel pipe 200 at regular intervals, the shoe 300 is fixed to the end of the steel pipe 200 and then drilled into the wall perforated hole 100. A first step of installation;

The grouting material is injected into the first packer 400 through the first grouting material injection hose 700 connected to the first packer 400 so that the steel pipe 200 is uniform in the inner center of the drilling hole 100. A second step of sealing between the outer surface of the steel pipe 200 and the inner wall surface of the drilling hole 100 while being firmly fixed at intervals;

A third step of fixing the second grouting material injection hose 800 together with the second packer 500 to the steel rod 600, and then entering the steel pipe 200 to form a multi-stage closed chamber 230;

A fourth step of injecting grouting material into the steel pipe 200 through a second grouting material injection hose 800 installed together with the second packer 500;

.

On the other hand, the present invention is injected into the grouting material in the steel pipe 200, characterized in that the grouting at the same time with a different size pressure in each sealed chamber separated into a plurality of first packers according to the ground conditions.

According to the present invention, even when the ground around the perforation hole is heterogeneously constructed, a plurality of first packers are installed according to the ground conditions to divide the area to be grouted, and a plurality of second packers are installed inside the steel pipe. In this case, the second packer is fixed to the steel bar, and then installed inside the steel pipe together with the steel bar. The second packer grouts the inside of the steel pipe, the inside of the drilling hole, and the surrounding ground through the second packer. As a result, there is an effect of strengthening by effectively grouting the surrounding ground where reinforcement is required.

In addition, although most of the existing methods do not reinforce steel pipes, despite the typical grouting and steel pipes, which are representative of the direct resistance of the walls such as tunnels to stabilize the activity or collapse, the present invention is used to install the second packer. Small steel pipes or steel rods are structurally integrated with the steel pipes after the grouting is completed and hardened, resulting in a direct increase in resistance to activity or collapse.

After the grouting is performed on the first packer and the sealing is completed, the steel pipe or the steel rod with the second packer is put into the steel pipe, and then the overall grouting is performed at a time, thus simplifying the construction step. Specifically, the ground is generally perforated. Since the ground conditions vary depending on the depth, it is possible to grind the surrounding ground more effectively by installing the packers by appropriately classifying them, and consequently strengthening the ground.

In addition, even when the first packer is not completely hardened, since the inside of the steel pipe, the perforation hole, and the surrounding ground grouting are performed at the same time, the inside of the first packer can be moved by the grouting pressure, so that the condensation effect is increased. It is effective.

1 is a schematic diagram of a conventional steel pipe multi-stage grouting method
Figure 2 is a perspective view showing a steel pipe multi-stage grouting method of the double packer method in the present invention
Figure 3 is a perspective view showing a shoe installed on the end of the steel pipe in the present invention
Figure 4 is a perspective view showing a first packer attached to the outside of the steel pipe in the present invention
Figure 5 is a perspective view showing a state of the first packer for installing outside the steel pipe of the present invention
Figure 6 is a perspective view of the first packer high-closed seal in the present invention
Figure 6a is a perspective view of a first packer moving airtight in the present invention
7 is a schematic cross-sectional view showing an embodiment of the first packer of the present invention.
8 is a schematic cross-sectional view showing an embodiment of a steel bar used when installing the second packer of the present invention.
9 is a schematic cross-sectional view showing an embodiment in which the second packer of the present invention is installed.
10 is a schematic cross-sectional view showing a second packer in the present invention.
Figure 11 is a perspective view showing an embodiment using a small steel pipe instead of a steel bar in the present invention
12 is a cross-sectional schematic diagram showing an embodiment of the present invention.

As shown in FIG. 2, the dual-packer steel pipe multi-stage grouting device according to the present invention has a steel pipe 200, a shoe 300 installed at the tip of the steel pipe 200, and an outer surface and a perforation of the steel pipe 200. The first packer 400 is installed between the inner wall surface of the hole 100, the second packer 500 is installed in the steel pipe 200, and the steel rod 600 is fixed to the second packer 500, the first The first grouting material injection hose 700 for injecting the grouting material into the packer 400 and the second grouting material injection hose 800 for injecting the grouting material into the steel pipe 200.

As shown in FIG. 3, a plurality of grouting material ejection holes 210 are installed on sidewalls of the steel pipe 200, and when grouting material is injected into the steel pipe 200, the inside of the steel pipe 200 is filled with grouting material. Then, the grouting material through the grouting material injection hole 210 is diffused to the surrounding ground outside the steel pipe 200, and is also ejected through the shoe grouting material injection hole 321 of the shoe 300, the tip of the steel pipe 200 It will grout on the ground located on the side.

In addition, the shoe 300 installed at the distal end of the steel pipe 200 facilitates the introduction of the steel pipe 200 in the drilling hole 100, and serves as a spacer for dropping the steel pipe 200 from the bottom of the drilling hole 100. In addition, when the collapse or deformation of the tunnel or the excavation surface is induced, the steel pipe 200 also serves as a part of the pull-out resistor like the anchor head when the role of the resistor.

Steel pipe connection portion 310 of the shoe 300 as described above is formed to a diameter larger than the steel pipe 200, it is preferable to form a diameter enough to fit tightly to the front end of the steel pipe 200, the steel pipe The entry part 320 formed on the other side of the connection part 310 is preferably formed in a cone shape.

As described above, the shoe 300 is configured to be fitted to the front end of the steel pipe 200 as described above. If this is described in more detail, the steel pipe connection part 310 formed on one side of the shoe 300 is included. There is a pair of steel pipe fixing holes 330 through which the bolt 340 closely penetrates to face each other, and the bolt through hole 220 at a position corresponding to the steel pipe connection 310 at the tip of the steel pipe 200. ) Is formed to match the steel pipe fixing hole 330 of the shoe 300 to the bolt through hole 220 of the steel pipe 200, the bolt through hole 220 and the steel pipe fixing hole as a bolt 340 ( It will be able to pass through the 330 to be fixed as a nut (350).

In addition, a method of connecting the steel pipe 200 and the shoe 300 by digging a female thread on the inner surface of the steel pipe connection part 310 and making a male thread on the outer surface of the steel pipe 200.

As shown in FIGS. 4 and 5, the outer surface of the first packer 400 is formed of a dense cloth or a waterproof cloth, and the configuration thereof will be described in more detail. It is made of a cloth or waterproof cloth, the bag-shaped inner portion 405 is composed of a loose cloth or a permeable cloth, the porous fiber 403, such as cotton in which the rapid expansion agent 402 is mixed therebetween, Lime powder 404 is a built-in structure, due to the above-described configuration of the first packer 400 grouting material in the interior of the first packer 400 through the first grouting material injection hose 700 It is possible to inject, and the volume of the first packer 400 formed in a bag shape increases according to the injection amount of the grouting material to closely fill between the outer surface of the steel pipe 200 and the inner wall surface of the drilling hole 100, Grouting material is hardened in a short time 00) to close the gap between the drilling hole (100).

As shown in Figure 6, the outer end of the first packer 400 is fixed to the outer surface of the steel pipe 200 by a high-sealing seal 410, looking at the high-sealing seal 410 more specifically, A donut shape in which a predetermined number of through holes is formed in the center, and the through holes formed through the center include a steel pipe through hole 411 through which the steel pipe 200 passes, and a first grouting injecting grouting material into the first packer 400. A first grouting material injection hose through hole 412 through which the re-injection hose 700 passes is formed, and the high-closed seal 410 is formed on the inner wall surface of the through-holes 411 and 412 in the steel pipe 200. Fixing protrusions 413 for fixing so as not to move in a fixed state is formed in the protruding inward direction, the outer circumference of the high-sealing closure 410 as a fixed band 430 to be firmly fixed Fixing groove A 414 is formed.

The high hermetic closure 410 as described above is to fix the outer end of the first packer 400 formed in a bag shape to the outer surface of the steel pipe 200, the inner end of the first packer 400 is a mobile sealing It is bound with a sphere 420, the mobile sealing sphere 420 is the same configuration as the high-precision sealing 410, but the steel pipe through hole 411 and the first grouting material injection hose through hole 412 The fixing protrusion 413 is not formed on the inner wall surface.

Unlike the high-tightness closing hole 410, the movable sealing hole 420 does not form the fixing protrusion 413 on the inner wall surface of the steel pipe through hole 421 and the first grouting material injection hose through hole 422. As the grouting material is injected into the first packer 400, the first packer 400 is swelled by the grouting pressure, and at this time, the first packer 400 is movable to buffer the fixed burden due to the increase in volume. The volume of the first packer 400 may also vary according to the size of the drilling hole 100.

FIG. 7 illustrates a state in which the first packer 400 is grouted before and after grouting is performed. The first sealer 400 is inflated, and the movable seal 420 is moved. It is to show.

In addition, the high-tight sealing opening 410 and the mobile sealing opening 420 of the first packer 400 also serves as a spacer to drop the steel pipe 200 and the bottom of the hole 100 due to the thickness surrounding the steel pipe 200. In addition, when the collapse or deformation of the tunnel or the excavation surface is induced, the steel pipe 200 also serves as a part of the pull-out resistor like an anchor when it serves as a resistor.

8 shows that the second packer 500 used for grouting inside the steel pipe 200 is fixed to the steel bar 600. Instead of the steel bar 600, a reinforced plastic rod, glass fiber reinforced plastic rod, It is also possible to form one of a steel pipe, a reinforced plastic pipe, a glass fiber reinforced plastic pipe, it is also possible to configure by winding the wire rope or glass fiber rope 610 integrally in each of the above configuration.

FIG. 10 is a front view and a cross-sectional view of the second packer 500. The second packer 500 is made of hard rubber, plastic, or steel, which is less elastic, and two or more through holes are formed therein. .

Here, the second packer 500 is also formed close to the donut shape in which the through hole is formed in the center. The through hole formed in the center of the second packer 500 includes a steel rod through hole 510 and a second grouting material injection hose. The through holes 520 are formed to penetrate, and the inner wall surfaces of the through holes 510 and 520 are firmly fixed to the steel bars 600, or the second grouting material injection hose 800 does not move. The fixing protrusion 530 is formed to protrude inward.

As shown in FIG. 10, the second packer 500 is formed by cutting the center of each through hole 510 and 520 to facilitate installation of the steel rod 600 and the second grouting material injection hose 800. Is formed in a structure, more specifically, when there are two through-holes formed in the center when the through-holes 510 and 520 are arranged side by side to cut the center, the second packer 500 is divided into two pieces Each through hole 510 and 520 is also formed in a structure in which the center is cut, and three through holes formed in the center (one steel rod through hole 510 and two second grouting material injection hose through holes 520) ( 520 ')), cut through the center of each through hole (510) (520) (520') by placing one through hole every 120 ° divided by 360 °, but cut into three pieces of the same size By doing so, the steel rod 600 and the second grouting material injection hose 700 (700 ') can be easily bound.

At this time, the second packer 500 to be separated and cut as described above is fixed to the outer circumferential surface by a fixed ring 550, the fixing groove, the fixing groove (in the outer circumferential surface of the second packer 500) 540 is formed to be able to bind more firmly by inserting the fixing ring 550 in the fixing groove 540.

Here, the separated second packer 500 is to be coupled by the fixing ring 550, in order to install it more easily, one side is gradually formed toward the end and the other side is formed in a cross section enlarged so that the fixing band is not separated It is also possible.

The second packer 500 may be used by combining a fixing band made of steel (steel) and the fixing ring 550, or may be easily coupled by installing a screw thread.

The construction method of the present invention using the double-packer steel pipe multi-stage grouting device according to the present invention as described above, the first packer 400 at an appropriate interval considering the state of the surrounding ground between the steel pipe 200 and the hole 100 Install the grouting area to maximize the grouting effect of the surrounding ground in multiple stages, and when grouting through the steel pipe 200, the second packer 500 is installed in the steel pipe 200 and then grouting It is a double packer method to effectively grout the surrounding ground by

Meanwhile, in order to prevent the movement of the second packer 500 while installing the second packer 500 in the steel pipe 200 and performing pressure grouting, the steel rod 600 fixing the second packer 500 at appropriate intervals is provided. By installing in the steel pipe 200 as a result it is characterized in that to improve the stability against the activity and collapse of the tunnel wall, etc. that the steel pipe 200 has, and at the same time to the second packer 500 installed in the steel pipe 200 In the case of injecting at different pressures through a plurality of second grouting material injection hoses 800 respectively connected to each other, the grouting may be performed at the same time, thereby simplifying and easy construction.

Since the ground is not homogeneous from the outside of the wall to the depth required for reinforcement, it is necessary to divide the grouting area. For this purpose, the first packer 400 having a bag type installed outside the steel pipe 200 at appropriate intervals according to the ground conditions. Wow; A first grouting material injection hose 700 installed to grout the interior of the plurality of first packers 400 so as to be in close contact with the plurality of first packers 400; When the grouting is carried out inside the first packer 400, a high-tight closed hole 410 for tightly fixing one side of the first packer 400 to the steel pipe; The other side of the first packer 400 is to be sealed but to be movable when subjected to pressure so that the volume increase size of the first packer 400 can be easily adjusted even when the drilling hole 100 is deformed or enlarged during drilling. It is composed of a mobile sealing opening 420; as a result, a plurality of first packer 400 is installed between the steel pipe 200 and the hole 100, the grouting material through the first grouting material injection hose 700 Since the injection seal is completely sealed by injection, the moving seal of the first packer located at the innermost side of the punching hole does not need to place the grouting material injection hose, so that the grouting material injection hose through-hole is not provided.

In this case, as described above, the first grouting material injection hose 700 injects grouting material into the first packers 400 installed in the drilling hole 100.

More specifically, the first grouting material injection hose 700 inserted from the outside of the drilling hole 100 is fitted to one side of the first packer A (400a) located at the entrance of the drilling hole from the outside, the first packer A The other side of the 400a and the one side of the first packer B (400b) that is installed next in the inner direction of the drilling hole 100 is formed in such a way that is connected to another first grouting material injection hose 700 ', When the grouting material is injected through the first grouting material injection hose 700, the grouting material is first filled in the first packer A 400a, and the hole is drilled through another first grouting material injection hose 700 ′ connected thereto. 100) The grouting material is sequentially filled into the first packers 400 inward.

When the grouting material is filled in such a structure, the grouting material filled in the first packer A 400a may be hardened before the filling is completed, but by injecting the grouting material into the injected grouting material at a high speed, The same concern can be solved.

In addition, the method of adding pressure when injecting the grouting material as described above, since the injection pressure gauge rises when all the grouting material is filled, it is easy to know that the grouting material is filled in the first packer 400, and thus the work efficiency is higher than in the related art. There is also an advantage.

In addition, even if the daring pressure is not added, it can be easily adjusted using a coagulation admixture that controls the degree of hardening of the grouting material.

In addition, the first packer 400 formed as the bag is in a loose state before the grouting material is injected, but expands taut when the grouting material is injected, so that the outer surface is firmly adhered between the outer wall surface of the steel pipe 200 and the perforation hole.

At this time, the mobile sealing opening 420 is fastened to the mobile sealing opening 420 in consideration of the fact that the first sealing unit 420 is moved in the direction of the high sealing opening 410 due to the expansion of the first packer 400, One side length of the first grouting material injection hose 700 embedded therein is preferably formed to a length such that it is not separated from the first packer 400 when the first packer 400 is inflated.

The first packer 400 using the high-precision sealing 410 and the moving sealing opening 420 may move the sealing hole 420 even when the grouting material is completely hardened therein, even when the grouting is performed. Due to the movement of the) is completely sealed between the outer wall surface of the steel pipe 200 and the hole 100.

On the other hand, the steel pipe 200 is installed in a plurality of appropriate intervals in the inside of the steel pipe 200 on the same line as the first packer 400, the second packer 500 is strongly bound to the outside of the steel bar (600); While grouting the inside of the steel pipe 200, the inside of the steel pipe 200 is continuously sealed by binding the fixing band 430 to the outside of the second packer 500, and the steel bar 600 and the second are sealed. Since the packer 500 and the second grouting material injection hose 800 can be prefabricated and fabricated, the injection into the steel pipe 200 becomes easier.

At this time, the steel rod 600 is located inside the steel pipe 200 after grouting, as a result, the steel rod 600 is structurally integrated with the steel pipe 200, so that the steel pipe 200 collapses the wall or the surrounding ground. B is strengthened from deformation and enjoy the nail effect.

When describing a method using a double packer steel pipe multi-stage grouting device as described above, a plurality of first packer 400 is installed in a suitable position of the steel pipe 200 is to be injected after drilling; Grouting into the first packer 400 to seal the first packer 400 to the drilling hole 100; Installing a second packer 500 at a proper position with a steel rod 600 to be introduced into the steel pipe 200; Through the second packer 500, grouting is performed on the inside of the steel pipe 200 and the hole 100, and the surrounding ground at the same time.

A: Caulking part B: Sealing material injection and discharge hose
C: Steel Pipe D: Sealing Material
100: perforation hole
200: steel pipe 210: grouting material jet hole
220: bolt through hole
230: sealed room
300: shoe 310: steel pipe connection
320: entry portion 321: shoe grouting material blowing hole
330: steel pipe fixing hole 340: bolt
350: nut
400: first packer 401: outer part
402: rapid expansion agent 403: porous fiber
404: lime powder 405: inner part
410: high-precision closed 411: steel pipe through hole A
412: first grouting material injection hose through hole 413: fixing protrusion
414: fixing groove A 420: mobile sealing
421: steel pipe through hole B
422: first grouting material injection hose through hole
423: fixing groove B
430: fixed band
500: Second Packer
510: steel rod through hole
520, 520 ': second grouting material injection hose through hole
530: fixing protrusion
550: retaining ring
600: steel bar
700: first grouting material injection hose
800, 800 ′: 2nd grouting material injection hose

Claims (18)

In the double packer steel pipe multi-stage grouting device,
Steel pipe 200 through which a plurality of grouting material injection hole 210 is formed on the side wall,
One side is composed of a steel pipe connecting portion 310 is fitted in the longitudinal direction to the end of the steel pipe 200 and the entry portion 320 formed on the other side of the steel pipe connecting portion 310 to the inner end of the steel pipe 200 A shoe 300 to be installed;
Being installed on the outside of the steel pipe 200, one end is bound to the high-tightness closed 410, the other end is bound to the mobile airtight 420 to be slipped on the outer surface of the steel pipe 200, A first packer 400 formed in a bag shape to fill the grouting material therein;
A steel rod 600 inserted into the steel pipe 200;
A second packer 500 fixedly formed on an outer surface of the steel rod 600 and fitted into an inner side of the steel pipe 200;
A first grouting material injection hose 700 formed on an outer surface of the steel pipe 200 to transport and grout the grouting material to the first packer 400;
And a second grouting material injection hose 800 formed in the steel pipe 200 to inject a grouting material into the steel pipe 200.
The high-tightness opening 410 of the first packer is formed with a steel pipe through-hole 411 through which the steel pipe 200 penetrates at one center thereof, and a first grouting material injection hose 700 penetrates at the other center thereof. 1 grouting material injection hose through hole 412 is formed, the steel pipe through hole 411 and the first grouting material injection hose through hole 412 the inner wall surface of the steel pipe through hole 411 and the first grouting material injection A fixing protrusion 413 is formed to prevent movement of the hose 700, and is formed by dividing into several pieces. A fixing groove A 414 is formed at an outer circumference, and a fixing groove A 414 is formed. Fixed band 430 is configured to wrap and secure,
The mobile seal 420 of the first packer has a steel pipe through-hole 421 through which the steel pipe 200 penetrates at one center thereof, and a first grouting material injection hose 700 penetrates at the other center thereof. 1 grouting material injection hose through-hole 422 is formed, the fixing groove B 423 is formed on the outer circumference, the fixing band B 423 is configured to wrap and secure the fixing band 430 ,
The second packer 500 has a steel rod through-hole 510 through which the steel rod 600 penetrates at one side of the center, and a second grouting material injection hose 800 through which the second grouting material injection hose 800 penetrates at the other center. A hose through hole 520 is formed, and a fixing protrusion 530 for preventing the flow of the steel rod 600 and the injection hose 800 on the inner wall surface of the injection hose through hole 520 and the steel rod through hole 510. Is formed to protrude in the inward direction, divided into a plurality of pieces, the outer periphery is formed with a fixing groove 540, the fixing ring 550 is configured to wrap and fix the fixing groove 540 One end is inclined to reduce the outer diameter, the other end is enlarged so that the fixing ring 500 is not separated,
The grouting material ejection hole 321 in the shoe is formed in the entrance part 320 of the shoe 300 to communicate with the outside of the shoe 300,
The first grouting material injection hose 700 is characterized in that it is divided into multiple stages, each connected to one side and the other side of the adjacent first packer 500,
Double packer steel pipe multi-stage grouting device.
delete The method of claim 1,
A pair of steel pipe fixing holes 311 are formed in the steel pipe connecting portion 310 of the shoe 300 to be symmetrical with each other, and the steel pipe 200 into which the steel pipe connecting portion 310 of the shoe 300 is fitted. Double packer steel pipe multi-stage grouting device, characterized in that the bolt through hole 220 corresponding to the steel pipe fixing hole (311) is formed at the end.
delete The method of claim 1,
The outer portion 401 of the first packer 400 is composed of a tight cloth or waterproof cloth, the inner portion 405 is made of a loose cloth or permeable cloth, between the rapid expansion material 402, porous fibers therebetween 403, a lime pack 404 is a cloth containing a double packer steel pipe multi-stage grouting device characterized in that formed in a bag shape.
delete delete The method of claim 1,
The high hermetic seal 410 of the first packer 400 is cut to the same size as the number of through holes 411 and 412 formed through the center, the center of each through hole 411, 412 is Double packer steel pipe multi-stage grouting device, characterized in that made of cut pieces are fixed with a fixing band (430).
The method of claim 1,
The moving sealing opening 420 of the first packer 400, the center of the steel pipe through-hole 421 and the first grouting material injection hose through-hole 422 is formed to be symmetrically cut symmetrically cut band 430 Double packer steel pipe multi-stage grouting device characterized in that the fixed by.
delete The method of claim 1,
The second packer 500 is made of pieces cut into the same size by the number of the steel rod through hole 510 and the second grouting material injection hose through hole 520 formed in the center, each through hole ( 510, 520, the center of the double packer steel pipe multi-stage grouting device characterized in that the symmetrical cut to each other.
The method of claim 11,
The second packer 500 is fixed to the outer surface of the steel bar 600 which is introduced into the steel pipe 200 at regular intervals, so that the number of the second packer 500 inside the steel pipe 200, the multi-stage sealed room Double packer steel pipe multi-stage grouting device, characterized in that to form a 230 to vary the grouting material injection pressure of each sealed chamber 230 according to the characteristics of the surrounding ground.
The method of claim 1,
The steel rod 600 is a double packer steel pipe multi-stage grouting device, characterized in that can be replaced by one of the reinforced plastic rod, glass fiber reinforced plastic rod.
The method of claim 1,
The steel bar 600 is a double packer steel pipe multi-stage grouting device, characterized in that the wire rope or glass fiber rope 610 in one of the reinforcing plastic rod or glass fiber reinforced plastic rod can be replaced with an integral winding.
The method of claim 1,
The steel bar 600 is a double packer steel pipe multi-stage grouting device, characterized in that can be replaced by one of the steel pipe, reinforced plastic pipe, glass fiber reinforced plastic pipe.
The method of claim 1,
The high-tight sealing opening 410 and the moving sealing opening 420 of the first packer 400 formed in a predetermined number in the steel pipe 200 from the inlet portion to the inner portion of the drilling hole 100, the steel pipe 200 Wrapped to a certain thickness on the outer surface of the), the steel pipe 200 is a double packer steel pipe multi-stage grouting device, characterized in that formed with a spacer to be located in the center of the drilling hole (100).
In the construction method of the double packer steel pipe multi-stage grouting device,
By using the dual packer steel pipe multi-stage grouting device of any one of the first, third, five, eight, nine, 11 to 16,
After the first packer 400 is formed on the outer surface of the steel pipe 200 at regular intervals, the shoe 300 is fixed to the end of the steel pipe 200 and then drilled into the wall perforated hole 100. A first step of installation;
The grouting material is injected into the first packer 400 through the first grouting material injection hose 700 connected to the first packer 400 so that the steel pipe 200 is uniform in the inner center of the drilling hole 100. A second step of sealing between the outer surface of the steel pipe 200 and the inner wall surface of the drilling hole 100 while being firmly fixed at intervals;
A third step of fixing the second grouting material injection hose 800 together with the second packer 500 to the steel rod 600, and then entering the steel pipe 200 to form a multi-stage closed chamber 230;
A fourth step of injecting the grouting material into the steel pipe 200, the hole 100, and the surrounding ground through the second grouting material injection hose 800 installed together with the second packer 500;
Double packer steel pipe multi-stage grouting device construction method comprising a.
18. The method of claim 17, wherein the grouting material is injected into the steel pipe 200, and the grouting material is grouted at a different size at the same time to each closed chamber 230 separated into a plurality of first packers 400 according to the ground conditions. Double packer steel pipe multi-stage grouting device construction method characterized in that.

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