KR102197759B1 - A grouting apparatus for simultaneous injecting 2.0shot grout material - Google Patents

Abstract

The present invention relates to a grouting apparatus for simultaneously injecting 2.0-shot grouting materials, which can use quick-setting and high-strength injecting materials in a deep perforation hole by compressively mixing two kinds of the grouting materials and allowing the same to be spread to the ground around the perforation hole after two kinds of the grouting materials are simultaneously injected into a steel pipe while the steel pipe is inserted into the perforation hole on the ground. To this end, the grouting apparatus for simultaneously injecting 2.0-shot grouting materials comprises: a steel pipe inserted into the perforation hole perforated on the ground; one- and two-liquid grouting injection hoses for injecting different kinds of grouting injection materials from each other into an inner space of the steel pipe, respectively; and a mixing block connected to the one- and two-liquid grouting injection hoses and spraying the mixed grouting injection materials to the inner space of the steel pipe while two kinds of the grouting injection materials injected through the one- and two-liquid grouting injection hoses are mixed.

Description

2.0 shot grouting material simultaneous injection grouting apparatus

The present invention relates to a grouting device for simultaneous injection of 2.0 shot grouting material, and more specifically, two grouting materials are simultaneously injected into the inside of the steel pipe in a state in which a steel pipe is inserted into a perforated hole in the ground, followed by compression mixing and drilling. The present invention relates to a simultaneous injection grouting device for 2.0 shot grouting material that allows it to diffuse into the ground around the hole so that rapid setting is quick and that a high-strength injection material can be used for long-depth drilling holes.

In general, underground and drilling spaces are secured by excavating a ground mainly composed of soil or rock, and at this time, if the ground constituting the excavation surface is not stable, there is a risk of collapse, and the excavation cannot proceed.

Therefore, during excavation, it is essential to strengthen or reinforce in various ways to stabilize the underground and drilling space, and nailing, rock bolts, anchors, steel pipe multi-stage grouting methods, etc. are used as these methods.

For civil engineering foundation piles and surrounding high-strength ground reinforcement and secondary ground reinforcement installation methods, 1.0 shot (e.g. LW high-molecular urethane solidification method), 2.0 shot (SCR rapid setting and fast-hardening high strength injection material method), tunnel reinforcement steel pipe multistage & pipe loop It is a system that can be applied as a combined use and applied for a combination of construction method, slope soiling pressure method, narrow section pressure micropile method, sinkhole reinforcement work method, narrow space order reinforcement section If the ground for excavation that can be customized to the site conditions with high quality has a lot of soil or weathering, or the rock quality is poor due to the development of joints, stratification, and crushing zones, excessive deformation or collapse may occur during excavation. Excavation should proceed with appropriate reinforcement.

As a representative construction to apply the underground and excavation space reinforcement method, there are tunnel construction or cut-out drilling construction. In particular, the upper part of the tunnel is most easily exposed to the risk of collapse during excavation when performing tunnel construction.

When the excavation surface is poor during excavation work, the Rock bolt or Nailing method, which is generally used, is often installed at a slightly downward angle. On the other hand, in the case of steel pipe multi-stage grouting, which is mainly used for reinforcing the upper part of the tunnel, unlike reinforcement on the cut slope, the end of the reinforcement must be installed upward from the excavation surface, so when grouting is performed between the reinforcement and the drilled hole, the grout is There is a problem of backflow.

In order to solve this problem, a backflow of grout is prevented by using a packer or a caulking material.

On the other hand, when ground reinforcement is required, not only reinforcement by the reinforcement inserted into the perforated hole but also the grouting effect of the ground around the tunnel wall is required, the Steel Pipe Reinforced Multi-step Grouting method is implemented.

In general, the steel pipe multi-stage grouting method is to insert a steel pipe after perforation, close the entrance of the perforated hole with caulking material, seal between the steel pipe and the perforated hole, and then install a packer inside the steel pipe to move the packer in multi-step grouting. It is a method of performing. This steel pipe reinforcement type multi-stage grouting method can simultaneously obtain the ground reinforcement effect by the steel pipe and the order effect by grouting.

The steel pipe reinforcement type multi-stage grouting method according to the prior art generally proceeds in the order of perforation, steel pipe insertion, caulking and sealing, and grouting, and is mainly used for ordering and reinforcing the soft weathered rock layer.

Specifically, in the perforation process, when the perforation hole is collapsed, it is perforated using a casing rod, otherwise, a general rod perforation is also possible. In the case of a casing rod, when inserting a steel pipe, remove the casing after inserting the steel pipe. The caulking of the hole inlet is caulked to prevent groundwater inflow and backflow of grouting material. For sealing the periphery of a steel pipe, use a product that does not reduce the volume of the sealing material and exhibits sufficient sealing effect.

Multistage grouting material injection is performed in stages according to the injection length determined according to the ground conditions.

The grouting injection material is usually injected into a steel pipe in a state in which a one-component injection material and a two-component injection material are mixed with each other to perform ground reinforcement and order grouting.

However, conventional prior art generally adopts a 1.0 shot or 1.5 shot type grouting material injection method, and this injection method mixes a 1-component injection material and a 2-component injection material from the outside, and then uses a pumping means such as a pump. As a method of injecting the mixed liquid into the steel pipe through a hose, this injection method takes time while the first and second liquid mixed injection materials pass through the hose when grafted to a long-depth steel pipe having a predetermined length or more. It is not possible to use as it is delayed and hardens and hardens inside the hose.

Moreover, even in the case of short steel pipes, only injection materials that harden slowly for a sufficient time to pass through the hose cannot be selected.These materials have low rapid setting, so the time to harden after soaking into the ground is reduced. It has the disadvantage of being vulnerable to ground leakage and ground reinforcement in the late period.

Document 1: Korean Intellectual Property Office Registered Patent Publication No. 10-1045727 Document 2: Korean Patent Office Publication No. 10-2017-0126170

Therefore, the present invention for solving the above-described problem is to simultaneously inject two grouting materials into the inside of the steel pipe in a state in which the steel pipe is inserted into the perforated hole of the ground, and then compress and mix it to diffuse into the ground around the perforated hole. Therefore, it is to provide a grouting device for simultaneous injection of 2.0 shot grouting material, which allows quick setting and high strength injection material to be used in long-depth drilling holes.

The present invention for achieving the above object is a 2.0 shot grouting material simultaneous injection grouting apparatus, a steel pipe inserted into a perforated hole drilled in the ground, a first injecting different types of grouting injection material into the inner space of the steel pipe, respectively. , Two-component grouting injection hose and the first, two-component grouting injection hose connected to the injection hose, the mixing of the two grouting injections injected from the first and two-component grouting injection hoses mixed and sprayed into the inner space of the steel pipe It is characterized by consisting of blocks.

At one side of the mixing block, two first and second inlets connected to the first and two-component grouting injection hoses are formed, and one outlet is formed at the other side, and the first and second inlets are formed inside the mixing block. It is preferable that the first and second inflow passages connected to the inlet port and one discharge passage connecting the first and second inflow passages and the outlet are formed.

In the present invention, the first, means for mixing the liquid grouting injection material is inserted into the inner space of the steel pipe in advance, and the injection material injected from the mixing block is mixed and sprayed into the inner space of the steel pipe, so that the gel time is fast within 5 to 20 seconds. Liquid grouting injection material with rapid setting can be injected into the inner space of the steel pipe, so that leakage around the perforated hole can be quickly blocked and high reinforcement can be obtained.

In addition, it is possible to overcome problems such as clogging of the hose due to hardening of the grouting injection material during the injection process by allowing the mixture to be carried out directly in the inner space of the steel pipe while each grouting injection material is separately injected. It also has the effect of being able to perform grouting by effectively grafting.

1 is a view showing the overall configuration of a 2.0 shot grouting material simultaneous injection grouting apparatus of the present invention.
FIG. 2 is a three-dimensional view showing the structure of the mixing block of FIG.
Figure 3 is a view showing a cross-section of Figure 2;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the detailed description to be described later, representative embodiments of the present invention will be presented in order to achieve the above-described technical problem. And other embodiments that may be presented by the present invention are replaced by descriptions in the configuration of the present invention.

In general, the installation methods for high-strength ground reinforcement and secondary ground reinforcement for civil engineering foundations and surroundings include 1.0 shot (e.g. LW high-molecular urethane solidification method), 2.0 shot (SCR rapid setting and fast-hardening high strength injection material method), tunnel reinforcement steel pipe multistage & pipe Roof construction method, slope soiling pressure method, narrow section pressure micropile construction method, sinkhole reinforcement work method, narrow space order reinforcement section can be applied, and it is a system that can be used and applied in an integrated manner for complex purposes, and the existing construction quality It is a construction method using a grouting device that simultaneously injects 2.0 shot grouting material that can be customized to the site conditions with higher quality.

The construction method is a composite system 2.0 shot simultaneous grouting device injection pipe, which combines special manufacturing and processing of injection devices at the tip, middle, and upper parts, and then combines the injection materials according to the stratum of the reinforced ground, with high-strength injection material and order of rapid setting. Ground reinforcement and order grouting are carried out by simultaneously injecting reinforcing materials, respectively, and ground reinforcement and order grouting are continuously applied.

For construction specifications, the injection tube buried type can be injected according to the specifications and site conditions from at least 60mm to 1000mm.

It can also be manufactured and used as an injection pipe for recovery, and the standard for installation of a specially manufactured injection pipe for the recovery section is applicable within a minimum of 60mm~150mm. The use of the injection pipe can be divided into two main categories by standard for buried type and for recovery.

The 2.0 shot grouting material simultaneous injection grouting device of the present invention is a device that solves the shortcomings that cannot be used for long-depth steel pipes because the rapid setting injection material cannot be used, which is the disadvantage of the 1.5 shot buried injection pipe, such as urethane injection material or rapid setting cement. It is a system device that can be used for long depths by using. On-site assembly processing is also possible depending on the site conditions. In addition, it is possible to use reinforcing injection material in the ground within 5 to 20 seconds of gel time, and it can be applied to a depth of 3.0 m to 50 m or more.

1 is a diagram showing the overall configuration of a grouting apparatus for simultaneous injection of a 2.0 shot grouting material of the present invention, FIG. 2 is a three-dimensional view showing the structure of the mixing block of FIG. 1, and FIG. 3 is It is a view showing a cross section of.

As shown in Figures 1 to 3, the 2.0 shot grouting material simultaneous injection grouting apparatus of the present invention is largely a steel pipe 10, at least one packer, a plurality of first and two-component supply hoses (50, 52) and It comprises at least one or more mixing blocks (100).

The steel pipe 10 is a pipe inserted into the perforated hole 200 drilled in the ground, and is manufactured to have a predetermined length according to the depth of the perforated hole 200, and a space 12 is formed therein.

At least one grouting material ejection hole 11 is formed through the outer diameter of the steel pipe 10, and in the grouting ejection hole 11, the grouting injection material filled in the inside of the steel pipe 10 is ejected to the outside of the steel pipe, 200) Grouting the ground by spreading it to the surrounding ground.

The packer is installed at a certain interval in the inner space 12 of the steel pipe 10 and is a means for dividing the inner space of the steel pipe into a unit space of a certain area, and a material having flexibility that expands when a filler is filled therein. It is made with.

In the present invention, the packer is composed of three unit packers (20, 22, 24), preferably first to third unit packers (20, 22, 24), and the first to third unit packers (20, 22). , 24) are respectively connected to the filler injection hose 26, expand by the filler injected through the filler injection hose 26, and expand the inner space 12 of the steel pipe 10 to the first to third unit spaces. It is divided into (14, 16, 18).

The mixing block 100 is inserted into the inner space of the steel pipe 10 and is supplied with a first liquid type grouting injection material and a second liquid type grouting injection material at a predetermined pressure at a pumping pressure of a pump installed outside. It is a block for mixing and spraying the liquid grouting injection material into the inner space 12 of the steel pipe 10 through the spray nozzle 42 in a state where they are mixed with each other.

That is, the 2.0 shot grouting material simultaneous injection grouting device of the present invention mixes the first and two-component grouting injection materials from the outside first, and then injects them into the inner space 12 of the steel pipe 10 inserted into the ground through a hose. Instead of a method, a means for mixing the first, liquid grouting injection material is inserted in advance into the inner space 12 of the steel pipe 10, so that the first and two liquid grouting injection material is passed through the respective hoses to the inner space 12 of the steel pipe 10 ), the injection material injected from the mixing block 40 previously inserted into the inner space 12 of the steel pipe 10 is mixed and sprayed into the inner space 12 of the steel pipe 10. Through this, it is possible to inject a type of liquid grouting injection material having a quick setting of within 5 seconds to 20 seconds into the inner space 12 of the steel pipe 10, and the injection material having such rapid setting is inside the steel pipe 10 When injected into the space 12 and diffused into the ground around the perforated hole through the grouting ejection hole 11, water leakage around the perforated hole can be quickly blocked and high reinforcement can be obtained.

Moreover, if the mixing of the two injection materials is made in the inner space 12 of the steel pipe 10 through the mixing block 100, not the outside, the length of the steel pipe 10 is very long, even in the steel pipe 10 having a length of 50 m or more. It can be used, but it is not inserted into the steel pipe 10 in a state in which two types of first and two-component grouting injection materials having the characteristics of starting to harden at the same time as mixing are mixed from the outside, but inside the steel pipe 10 In the state where each grouting injection material is separately injected into the space 12, mixing is performed directly in the inner space 12 of the steel pipe 10, thereby overcoming problems such as clogging of the hose due to hardening of the grouting injection material during the injection process. It is possible to perform grouting construction by effectively grafting even long long-depth steel pipes.

As shown in FIGS. 2 and 3, the mixing block 100 has a rectangular parallelepiped shape and has two first and second inlets 30 and 32 on one side, and one outlet on the other side.

The mixing block 100 includes first and second inflow passages 34 and 36 connected to the first and second inlet ports 30 and 32, and the first and second inflow passages 34 and 36 and the outlet. One discharge passage 38 connecting the 40 is formed.

The first inlet 30 of the mixing block 100 is connected to the end of the first liquid type injection hose 50 for injecting the first liquid type grouting injection material, and the second inlet 32 has a second liquid type grouting injection material The end of the second liquid type injection hose 52 for injecting is connected.

The tips of the first and two-component injection hoses 50 and 52 are connected to the first and two-component supply tanks installed outside the steel pipe 10, respectively, to feed the grouting injection material into the first and second inlets according to the pumping operation of the pump. To be supplied.

The first and second liquid grouting injection material supplied to the first and second inlets (30, 32) passes through the first and second inlet passages (34, 36) connected to the first and second inlets (30, 32). In the process of passing through one discharge passage 38, the two first and two-component grouting injection materials start to be mixed with each other, and the mixed first and two-component grouting injection material is an outlet connected to the discharge passage 38 It is discharged to the outside through 40 and is sprayed into the inner space 12 of the steel pipe 10. That is, the injection material passing through the two first and second inflow passages 34 and 36 is subjected to high pressure in the process of passing through one discharge passage 38, so that the first, The two-component grouting injection material is thoroughly mixed.

A spray nozzle 42 is connected to the outlet 40 of the mixing block 100. The injection nozzle 42 injects the mixed grouting injection material discharged through the outlet 40 into the inner space 12 of the steel pipe 10.

The mixed grouting injection material injected into the inner space 12 of the steel pipe 10 is diffused into the ground around the perforated hole through the grouting ejection hole 11 formed in the outer diameter of the steel pipe 10, and in this process, the grouting injection material Is hardened and ground reinforcement and order grouting are applied.

Meanwhile, the mixing block 100 has the same structure, and the first to third unit spaces 14 partitioned in the inner space 12 of the steel pipe 10 through the first to third unit packers 20, 22, 24 , 16, 18) are preferably installed and configured.

In addition, the mixing blocks 100 installed in the first to third unit spaces 14, 16, 18, respectively, are provided with separate first and two-component injection hoses 50 to supply the first and second liquid grouting injection materials according to the number. It is desirable to further provide 52).

On the other hand, the mixing block 100 is usually manufactured in an buried type, and can be manufactured and used as a recovery injection pipe if necessary. When the mixing block is used for recovery, the recovery section is a specially manufactured injection pipe installation standard. It can be applied between at least 60mm~150mm.

Hereinafter, a construction method using the simultaneous injection grouting apparatus of 2.0 shot grouting material according to the present invention will be described.

First, a perforation hole 200 is perforated for ground reinforcement, and then a steel pipe 10 is inserted into the perforated hole 200.

Next, the first to third unit packers 20, 22, and 24, which are connected and installed by a packer injection hose 26, are inserted into the inner space 12 of the steel pipe 10.

At this time, the mixing block 100 is positioned between the first to third unit packers 20, 22, and 24, and the first and two component injection hoses 50 and 52 are provided in each of the mixing blocks 100. Is connected. That is, when three mixing blocks are disposed between the first to third unit packers 20, 22, and 24, three pairs of first and two component injection hoses 50 and 52 are connected to each mixing block. Make it possible.

Next, the first to third unit packers 20, 22, 24 are expanded by filling the first to third unit packers 20, 22, 24 with fillers through the packer injection hose 26 to expand the steel pipe. The inner space 12 of (10) is divided into first to third unit spaces 14, 16, and 18.

Subsequently, when two types of first and second liquid grouting injection materials are supplied to the mixing block 100 through each of the first and two component injection hoses 50 and 52, the first and two liquid grouting injection materials are mixed with the mixing block 100. In the process of passing through one discharge passage 38 through the first and second inflow passages 34 and 36, the mixed grouting injection material is the discharge port 40 connected to the discharge passage 36 It is discharged to the outside through the steel pipe 10 and injected into the inner space 12 of the steel pipe 10, and the sprayed mixing grouting injection material diffuses to the periphery of the perforated hole 200 through the grouting spout 11 of the steel pipe 10 and reinforces the ground. And order grouting.

In this way, the grouting injection material is not injected into the steel pipe while the grouting injection material is mixed from the outside, but after the first and two-component grouting injection materials are injected into the steel pipe 10, respectively, a mixing block installed inside the steel pipe 10 As it is sprayed into the inner space 12 of the steel pipe 10 in the state mixed at 100, it is possible to overcome problems such as clogging of the hose due to hardening of the grouting injection material during the injection process, so it is effective even for long-depth steel pipes. By grafting, grouting can be performed.

10: steel pipe 12: space
20: first unit factor 22: second unit factor
24: 3rd unit factor 34: 1st inflow hose
36: second inlet hose 38: discharge hose
50: first component injection hose 52: second component injection hose
100: mixed block

Claims (2)

In the 2.0 shot grouting material simultaneous injection grouting device,
A steel pipe 10 inserted into the perforated hole 200 drilled in the ground and having a space 12 formed therein;
It is installed at a certain interval in the inner space 12 of the steel pipe 10 and divides the inner space 12 of the steel pipe 10 into first to third unit spaces 14, 16, 18 of a certain area 1st to 3rd unit packers 20, 22, 24 to make;
A filler injection hose (26) connected to the first to third unit packers (20, 22, 24) and for injecting and expanding the filler material into the first to third unit packers (20, 22, 24);
First and two-component grouting injection hoses 50 and 52 for injecting different types of first and two-component grouting injection materials into the first to third unit spaces 12 of the steel pipe 10, respectively;
The steel pipe 10 is connected to the first and two-component grouting injection hoses 50 and 52 and mixed with the first and two-component grouting injection materials injected from the first and two-component grouting injection hoses 50 and 52. Consisting of a mixing block 100 for spraying into the inner space 12 of );
One side of the mixing block 100 is formed with two first and second inlets 30 and 32 respectively connected to the first and two component grouting injection hoses 50 and 52, and one outlet 40 at the other side thereof. ) Is formed;
The mixing block 100 includes first and second inflow passages 34 and 36 connected to the first and second inlet ports 30 and 32, and the first and second inflow passages 34 and 36 and the outlet. It is configured so that one discharge passage 38 connecting the 40 is formed;
The first and second liquid grouting injection materials introduced into the first and second inflow passages 34 and 36 of the mixing block 100 are mixed with each other in the process of passing through one discharge passage 38, and the discharge port 40 ) To be discharged through;
The mixing blocks 100 have the same structure and are installed one by one in the first to third unit spaces 14, 16, 18;
2.0, characterized in that the first and second liquid injection hoses 50 and 52 are individually further connected for each mixing block 100 installed in the first to third unit spaces 14, 16, 18, respectively. Shot grouting material simultaneous injection grouting device.
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