KR102524835B1 - Grout injection device and grouting construction method - Google Patents

Abstract

The present invention relates to a grout injection device and a grouting construction method using the same. In manufacturing the grout injection device, various types of air/water discharge means are provided to filter out large particles of grout and discharge only air and water when grout is injected. It is possible to easily and quickly complete the grout injection device with an improved structure that is
If the grout injection device of the present invention equipped with air/water discharge means is inserted into a hole drilled in the ground and then the grouting construction method is performed, the air/water discharge means when the grout is forcibly injected with strong injection pressure through the grout injection pipe. Large particles of the grout are filtered by the filter member constituting the grout, and since only the air and water contained in the grout pass through and are easily discharged to the outside along the discharge hose, the injection of the grout is easily performed, so the injection time is greatly shortened, It works like squeezing the grout and discharging only air and water to the outside, so the loss of grout is reduced, and the grout curing time is greatly shortened due to the discharge of air and water. It is possible to obtain a ground improvement body with much higher strength than the grouting construction method used.

Description

Grout injection device and grouting construction method using the same {Grout injection device and grouting construction method}

The present invention relates to a grout injection device and a grouting construction method using the same, and more particularly, various types of air/water discharge means are provided to filter out large particles of grout and discharge only air and water when grout is injected,

When grout is injected, large particles of grout are filtered out and only air and water are discharged to the outside so that loss of grout is reduced and curing time of grout is shortened due to discharge of air and water. It relates to a device and a grouting construction method using the device.

In general, in order to install a tunnel or underground structure in the lower part of a structure located on the upper part of the soft ground, the bearing capacity of the excavated ground is strengthened in advance before tunnel excavation, thereby blocking groundwater contained in the ground and preventing the fall of the excavated surface and overexcavation. By securing the stability of the excavation surface, tunnel excavation proceeds safely and quickly.

In order for the tunnel structure to be built to be stably supported for a long time, the soft ground improvement and reinforcement work must be preceded.

A lot of construction methods for improving and strengthening soft ground and grout injection devices for carrying out this construction method have been devised. As an example, there is Patent Registration No. 10-776304, which uses a pair of packer supports to create a packer assembly and this packer assembly It relates to a direct drilling grouting construction method in which a grout injection device is made using a grout injection device and a grout injection material is injected into the ground using the grout injection device to improve and strengthen soft ground.

However, such a pre-registered invention requires a lot of time and work because the packer assembly must be manufactured by inserting both ends of the packer into the outer surface of the protruding support formed on the pair of packer supports and then tensioning them with a binding tool to connect and install them individually. this was tricky

In addition, since the packer supports are separated as a pair, the up and down movements are severe even when connected and installed by the packers, so the packer assembly is inserted into a plurality of quick-filling material injection pipes and grout injection pipes in multiple stages to manufacture a grout injection device. Not only was it inconvenient to do so, but also the work was inconvenient because the packer assembly moved too much even when trying to insert and install the grout injection device into a predetermined position inside the steel pipe in which the grouting injection hole was formed.

On the other hand, even in the case of the grout injection device made by inserting and installing the packer assembly in multiple stages at predetermined intervals, several quick-settle injection pipes must be installed to inject the quick-settle material into the packer, so this also takes a lot of installation time and wastes materials. brought

In addition, since the packer supports are separated into a pair, a wide empty space is formed inside the packer, so a large amount of quickening material must be injected at once to seal the inside of the steel pipe by expanding the packer, which also saves expensive quickening material. brought

However, above all, the grout injection devices of the prior registration invention as well as other conventional structures contain water and air in the grout material during grout injection, so that the grout curing time is prolonged and at the same time a ground improver with higher strength is produced. It was difficult to get.

In addition, if the injection pressure of the grout injection pump is increased to extend the injection time and injection range, the phenomenon that the grout material, which is somewhat soft in concentration because it contains water and air, is discharged to the surface is severe, so increase the injection pressure and inject There were many limitations in trying to reduce the time and expand the injection range.

The present invention was devised in view of the above-mentioned problems, and in manufacturing a grout injection device, various types of air/water discharge means are provided to filter out large particles of grout and discharge only air and water when grout is injected. By providing a grout injection device of an improved structure that is,

When grout is injected, large particles of grout are filtered out and only air and water are discharged to the outside, so grout injection is easy and injection time is shortened, grout loss is small, and grout curing time is shortened due to discharge of air and water. The purpose is to help obtain a ground improvement body with better strength.

In addition, the present invention improves the structure of the air/water discharge means so that assembly, installation, and use can be performed very quickly and perfectly. Another purpose is to increase the grout injection efficiency by shortening the injection time and extending the injection range more than when using the devices.

The grout injection device of the present invention for achieving the object described in the above problem to be solved is basically a casing made of a hollow tube body inserted into a perforation hole formed in the ground and having a plurality of grout outflow holes formed on the outer surface,

A sealing stopper coupled to the upper end of the casing to seal the casing and the inlet of the perforation hole;

A packer inserted and installed inside the casing at predetermined intervals to create a plurality of compartmental spaces;

In the grouting injection device comprising a sealing stopper and a grout injection pipe installed through the packer so that the tip is positioned in a plurality of compartments formed by the packer to inject grout, respectively,

It is installed to communicate with the outside in the plurality of compartments formed in the packer, and further configures air / water discharge means capable of filtering out large particles of grout and discharging only air and water when grout is injected,

When grout is injected, large particles of grout injected into the casing through the grout injection pipe are filtered out and only the air and water contained in the grout are discharged to the outside, resulting in less grout loss and reduced grout curing time due to the discharge of air and water. is made to obtain an excellent ground improvement body.

On the other hand, the grouting construction method using the grout injection device of the present invention is basically a hose connector made of a hollow tubular body coupled to a discharge hose installed through a sealing stopper and a packer and a tip of the discharge hose and having a plurality of discharge holes formed on the outer surface. and providing a filter equipped with a fixing means that is covered on the outer surface of the hose connector made of the hollow tube to filter out large particles of the grout when the grout is injected, allow only air and water contained in the grout to pass through, and fix it so that it does not escape from the hose connector. and;

A predetermined number of grout injection pipes are inserted and installed through the sealing stopper and the packer, and the discharge hose is also inserted and installed at the same time,

A hose connector made of a hollow tubular body having a plurality of discharge holes formed on the outer surface is connected to the front end or middle of the discharge hose, and when grout is injected into the outer surface of the hose connector, a filter is made to filter out large particles of grout and pass only air and water contained in the grout. Completing the installation of the air/water discharge means by fixing the member so that it does not come off using a fixing means after covering the member;

After passing through the sealing stopper and packer, the installation of the grout injection pipe and air/water discharge means is inserted into the casing made of a hollow tube with a plurality of grout outflow holes formed on the outer surface, and then the entrance of the casing is sealed with a sealing stopper to inject grout. Completing the assembly of the device;

inserting and installing the assembled grout injection device into a drilling hole drilled in the ground, but sealing all entrances to the drilling hole;

The grout is forcibly injected through the grout injection pipe using a grout injection pump to infiltrate the grout into the ground through a plurality of grout outflow holes formed on the outer surface of the casing,

Large particles of the grout are filtered out by the filter member constituting the air/water discharge means, and only the air and water contained in the grout are forcibly discharged to the outside through the discharge hole of the hose connector and the discharge hose coupled to the hose connector, resulting in loss of grout. This is achieved by performing steps to shorten the grout curing time due to the discharge of air and water and to obtain a ground improvement body with better strength.

In the present invention, in manufacturing the grout injection device, the installation of the air/water discharge means 200 is performed very simply and quickly, and as a result, there is an advantage in that the assembly of the grout injection device is very simple and quick.

In addition, when grout is injected by force with strong injection pressure through the grout injection pipe, large particles of the grout are filtered out by the filter member constituting the air/water discharge means, and only the air and water contained in the grout pass through and are discharged. Because it is easily discharged to the outside along the hose,

Since the injection of grout is performed easily, the injection time is greatly shortened,

It has the advantage of reducing the loss of grout because it works like squeezing the grout and discharging only air and water to the outside.

In addition, there is an advantage in that the grout curing time is greatly shortened due to the discharge of air and water.

In addition, there is an advantage of obtaining a ground improvement body having much higher strength than a grouting construction method using a conventional grout injection device.

Therefore, it is clear that the present invention is a very innovative invention that can greatly contribute to industrial development.

1 to 4 are views showing one embodiment of the grout injection device of the present invention,
1 is a view showing a state in which air/water discharge means are formed using discharge hoses separately installed in a plurality of compartments;
2 is a view showing a state in which an air/water discharge means is formed using a discharge hose connected to a plurality of compartments in a long line.
3 is a view showing a state in which an air/water discharge means is formed while using an expandable packer.
Figure 4 is a view showing a state in which the air / water discharge means is integrally formed with the expandable packer.
5a and 5b are diagrams showing one configuration of the air/water discharge means formed in the present invention,
Figure 5a is an exploded perspective view;
Figure 5b is an exemplary cross-sectional view of an assembled state.
6a and 6b are diagrams showing other configurations of the air/water discharge means formed in the present invention,
Figure 6a is an exploded perspective view;
Figure 6b is an exemplary cross-sectional view of an assembled state.

Hereinafter, an embodiment of the present invention for achieving the object described in the above problem to be solved will be described in detail based on the accompanying drawings 1 to 6b. An embodiment described below is shown by way of example to aid understanding of the present invention, and it should be understood that the present invention may be variously modified and implemented differently from the embodiment described herein. However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the subject matter of the present invention, the detailed description and detailed illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to an actual scale to aid understanding of the present invention, and the dimensions of some components may be exaggerated.

The grout injection device according to the present invention basically includes a casing 10 made of a hollow tubular body, which is inserted into a drilled hole 1a formed in the ground 1 and has a plurality of grout outflow holes 11 formed on the outer surface;

A sealing stopper 20 coupled to the upper end of the casing 10 to seal the inlet of the casing 10 and the perforation hole 1a;

A packer 30 inserted and installed inside the casing 10 at predetermined intervals to create a plurality of compartmental spaces;

It is configured to include a sealing stopper 20 and a grout injection pipe 40 installed through the packer 30 so that the tip is positioned in a plurality of compartments formed by the packer 30 to inject grout, respectively. It becomes

The most characteristic feature is an air/water discharge means that is installed to communicate with the outside in a plurality of compartments formed in the packer 30, and can filter out large particles of grout and discharge only air and water when grout is injected. By further configuring (200),

When grout is injected, large particles of the grout injected into the casing 10 through the grout injection pipe 40 are filtered out and only the air and water contained in the grout are discharged to the outside, so the loss of grout is small and the curing time of the grout is reduced due to the discharge of air and water. This is made to obtain a ground improvement body having excellent strength at the same time as the shortening.

Here, the air / water discharge means 200 in the present invention is a discharge hose 210 installed through the sealing stopper 20 and the packer 30 as a configuration example,

A hose connector 220 made of a hollow tubular body coupled to the front end of the discharge hose 210 and having a plurality of discharge holes 221 formed on the outer surface thereof;

It consists of a filter member 230 equipped with a fixing means 231 made of a steel string or Velcro tape that is covered on the outer surface of the hose connector 220 made of the hollow tube body and fixed so that it does not come off.

Therefore, the grout injection devices 100 equipped with the air/water discharge means 200 having such a configuration, that is, discharge hoses separately installed in a plurality of compartments partitioned by the packer 30 as shown in FIG. 210 is used to form the air/water discharge means 200, or

As shown in FIG. 2, the air/water discharge means 200 is formed using the discharge hose 210 connected in a long line to the plurality of compartments,

As shown in FIG. 3, when the quick filler is injected through the quick filler injection pipe 41 and the quick filler is injected through the quick filler injection hole 31a provided in the cylindrical packer support 31, the expansion member 32 expands and the casing (10) Using the grout injection device of the present invention in which the air/water discharge means 200 is formed while being used for the expandable packer 30 that seals the inside, the grout is injected with strong injection pressure through the grout injection pipe 40. When forcedly injected, large particles of the grout are filtered out by the filter member 230 constituting the air/water discharge means 200, and only the air and water contained in the grout pass through the plurality of discharge holes formed in the hose connector 220. It is easily discharged to the outside along the discharge hose 210 coupled to the 221 and the hose connector 220.

More specifically, the air inside the casing is discharged first, and the grout is easily injected. Then, when the grout material rises up to the filter member 230, the large particles of the grout are filtered out by the filter member 230, and the residual contained in the grout Only air and water pass through and are easily discharged to the outside along the plurality of discharge holes 221 formed in the hose connector 220 and the discharge hose p coupled to the hose connector.

Therefore, as if squeezing the grout, the large particles of the grout are filtered out and only the air and water contained in the grout are discharged to the outside. At the same time, a ground improvement body having higher strength can be obtained.

As shown in FIG. 4 of the accompanying drawings, this action effect is another configuration example of the air/water discharge means 200, and when the quick-pay material is injected through the quick-pay material injection hole 31a provided in the cylindrical packer support 31, the expansion member While (32) expands, it is formed integrally with the expandable packer 30 that seals the inside of the casing 10,

The lower part of the packer support 31 is formed with a smaller diameter than the upper part, and a horizontal hole 31c communicating with the vertical hole 31b coupled to the lower end of the discharge hose 210 connected to the outside is formed on the side surface of the lower part of the packer support 31, and then the horizontal hole 31c is formed. The same applies to the case where the filter member 230 provided with the fixing means 231 is fixedly installed so that the hole 31c is covered.

That is, when the grout is forcibly injected with strong injection pressure through the grout injection pipe 40, the filter member 230 constituting the air/water discharge means 200 integrally provided under the expandable packer 30 The large particles of the grout are filtered out and only the air and water contained in the grout are forcibly discharged to the outside through the horizontal hole 31c, the vertical hole 31b communicating therewith, and the discharge hose 210 coupled to the vertical hole 31b. Because it gives

In addition, the grout curing time is shortened due to the discharge of air and water while the loss of the grout is small, and it is possible to obtain a ground improver with higher strength.

On the other hand, the present invention has a predetermined depth inside the hose connector 220 made of a hollow tube as shown in FIG. By integrally forming the locking jaw 222 on the

Of course, it can be conveniently and quickly coupled to a predetermined depth only to the part where the tip of the discharge hose 210 is caught on the locking jaw 222,

As shown in FIGS. 6A to 6B, an auxiliary connector 300 made of a hollow tubular body having locking jaws 301 and 302 formed on the upper outer periphery and the lower inner periphery, respectively, is further provided,

After inserting and installing the auxiliary connector 300 into the end of the hose connector 220 made of a hollow tube, the discharge hose 210 is coupled to the auxiliary connector 300 to a predetermined depth, or

Alternatively, after coupling the auxiliary connector 300 to the front end of the discharge hose 210, the auxiliary connector 300 can be conveniently and quickly coupled to a predetermined depth through a method of coupling the auxiliary connector 300 to the hose connector 220 made of a hollow tube. there is.

In addition, by further forming a locking protrusion 300a on the lower outer surface of the auxiliary connector 300,

As a result, the hooking protrusion 300a of the auxiliary connector 300 is coupled to the discharge hole 221 formed in the hose connector 220 and firmly fastened, so that the connection of the discharge hose 210 can be very robust.

Therefore, as a result of this configuration, the installation of the air/water discharge means 200 is made very easy, and thus, the overall working time can be greatly reduced.

The grouting construction method using the grout injection device of the present invention described above is as follows.

<Example 1>

The discharge hose 210 installed through the sealing stopper 20 and the packer 30 and the hose connector made of a hollow tubular body coupled to the tip of the discharge hose 210 and having a plurality of discharge holes 221 formed on the outer surface ( 220) and a fixing means that is covered on the outer surface of the hose connector 220 made of the hollow tube to filter out large particles of grout when grout is injected, allow only air and water contained in the grout to pass through, and fix it so that it does not escape from the hose connector 220 providing a filter member 230 equipped with 231;

A predetermined number of grout injection pipes 40 are inserted and installed through the sealing stopper 20 and the packer 30, and the discharge hose 210 is also inserted and installed at the same time,

When a hose connector 220 made of a hollow tubular body having a plurality of discharge holes 221 formed on the outer surface is connected to the front end or middle of the discharge hose 210, and grout is injected into the outer surface of the hose connector 220, large particles of grout After filtering and covering the filter member 230 made to pass only air and water contained in the grout, fixing it using a fixing means 231 so as not to be separated to complete the installation of the air/water discharge means 200;

The assembly in which the installation of the grout injection pipe 40 and the air/water discharge means 200 is completed by penetrating the sealing stopper 20 and the packer 30 is converted into a hollow tube body having a plurality of grout outflow holes 11 formed on the outer surface. Completing the assembly of the grout injection device 100 by inserting the grout into the casing 10 and sealing the inlet of the casing 10 with a sealing stopper 20;

Inserting and installing the assembled grout injection device 100 into the drilling hole 1a drilled in the ground 1, but sealing all the entrances of the drilling hole 1a;

The grout is forcibly injected through the grout injection pipe 40 using a grout injection pump to infiltrate the grout into the ground through a plurality of grout outflow holes 11 formed on the outer surface of the casing 10,

Large particles of the grout are filtered out by the filter member 230 constituting the air/water discharge means 200, and only the air and water contained in the grout pass through the discharge hole 221 of the hose connector 220 to the hose connector 220. It includes a step of forcibly discharging to the outside through the discharge hose 210 coupled to the grout to reduce the grout curing time due to the discharge of air and water while reducing the loss of the grout and to obtain a ground improver with higher strength.

In the grouting construction method according to Example 1 described above, as shown in FIG. 1, air/water discharge means 200 are formed using discharge hoses 210 separately installed in a plurality of partitioned spaces partitioned by packers 30. Alternatively, as shown in FIG. 2, the air/water discharge means 200 is formed using the discharge hose 210 connected to the plurality of compartments in a long line, as well as the quick fixing material injection pipe 41 as shown in FIG. When the quick filler is injected through the quick filler injection hole 31a provided in the cylindrical packer support 31, the expandable member 32 expands and seals the inside of the casing 10 (30). ) while using the grout injection device 100 of the present invention equipped with an air/water discharge means 200,

When grout is forcibly injected with strong injection pressure through the grout injection pipe 40, large particles of grout are filtered out by the filter member 230 constituting the air/water discharge means 200, and the air and Since only water passes through and is easily discharged to the outside along the plurality of discharge holes 221 formed in the hose connector 220 and the discharge hose 210 coupled to the hose connector 220,

Since the injection of grout is performed easily, the injection time is greatly shortened,

It works like squeezing the grout and discharging only air and water to the outside, so the loss of grout is reduced.

In addition, the grout curing time is greatly shortened due to the discharge of air and water.

In addition, it is possible to obtain a ground improvement body having much higher strength than a grouting construction method using a conventional grout injection device.

On the other hand, in the grouting construction method of the present invention according to Example 1, when installing the air/water discharge means 200,

As shown in FIG. 5B, the hooking jaw 222 is integrally formed at a predetermined depth on the inside of the hose connector 220 made of a hollow tube body, so that the discharge hose 210 is conveniently and quickly at a predetermined depth only up to the part where the hooking jaw 222 is caught Of course, you can combine

As shown in FIGS. 6A and 6B, the discharge hose 210 can be conveniently and quickly coupled using the auxiliary connector 300 made of a hollow tube body having locking jaws 301 and 302 formed on the upper outer periphery and the lower inner periphery, respectively. As a result, since the installation of the air/water discharge means 200 is made very easy, the overall working time can be greatly reduced.

<Example 2>

Packer support of the expandable packer 30 that seals the inside of the casing 10 while the expansion member 32 expands when the filler is injected through the filler injection hole 31a provided in the cylindrical packer support sphere 31 (31) The lower part is formed with a smaller diameter than the upper part, and a horizontal hole (31c) communicating with the vertical hole (31b) to which the lower end of the discharge hose 210 connected to the outside is formed on the side thereof is formed, and then the horizontal hole (31c) Manufacturing an inflatable packer 30 integrally equipped with an air/water discharge means 200 by fixing and installing a filter member 230 equipped with a fixing means 231 so as to wrap the filter member 231;

A predetermined number of grout injection pipes 40 are inserted and installed through the sealing stopper 20 and the packer 30, and at the same time, a discharge hose 210 and an air/water discharge means 200 are integrally provided. Expandable packer 30 Step of connecting and installing the air/water discharge means 200 and the expandable packer 30 at the same time by connecting them to the vertical holes 31b provided in the );

After the air/water discharge means 200 and the expandable packer 30 have been installed at the same time, the assembly is inserted into the casing 10 made of a hollow tubular body having a plurality of grout outlet holes 11 formed on the outer surface, and then the casing 10 ) completing the assembly of the grout injection device 100 by sealing the inlet with a sealing stopper 20;

Inserting and installing the assembled grout injection device 100 into the drilling hole 1a drilled in the ground 1, but sealing all the entrances of the drilling hole 1a;

The grout is forcibly injected through the grout injection pipe 40 using a grout injection pump to infiltrate the grout into the ground through a plurality of grout outflow holes 11 formed on the outer surface of the casing 10,

Large particles of the grout are filtered out by the filter member 230 constituting the air/water discharge means 200 integrally provided under the expandable packer 30, and only the air and water contained in the grout pass through the horizontal holes 31c and It is forcibly discharged to the outside through the vertical hole 31b communicating therewith and the discharge hose 210 coupled to the vertical hole 31b, so that the loss of grout is reduced and the grout curing time is shortened due to the discharge of air and water, and the strength is increased. It is made by performing steps to obtain an excellent ground improvement body.

In the grouting construction method of the present invention according to the second embodiment as described above, as shown in FIG. When injected, the expansion member 32 expands and is formed integrally with the expansion type packer 30 that seals the inside of the casing 10,

The lower part of the packer support 31 is formed with a smaller diameter than the upper part, and a horizontal hole 31c communicating with the vertical hole 31b coupled to the lower end of the discharge hose 210 connected to the outside is formed on the side surface of the lower part of the packer support 31, and then the horizontal hole 31c is formed. It is to use the grout injection device 100 equipped with the air/water discharge means 200 made by fixing the filter member 230 equipped with the fixing means 231 so that the hole 31c is covered,

When the grout is forcibly injected with strong injection pressure through the grout injection pipe 40, the grout is removed by the filter member 230 constituting the air/water discharge means 200 integrally provided under the expandable packer 30. The large particles of are filtered out and only the air and water contained in the grout are forcibly discharged to the outside through the horizontal hole 31c, the vertical hole 31b communicating therewith, and the discharge hose 210 coupled to the vertical hole 31b. because,

The grouting construction method according to Example 2 also makes it easy to inject the grout, so the injection time is greatly shortened.

It works like squeezing the grout and discharging only air and water to the outside, so the loss of grout is reduced.

In addition, the grout curing time is greatly shortened due to the discharge of air and water.

In addition, it is possible to obtain a ground improvement body having much higher strength than a grouting construction method using a conventional grout injection device.

On the other hand, in the grouting construction method of the present invention according to Example 2, since the air/water discharge means 200 is formed integrally with the expandable packer 30,

Since the installation of the air/water discharge means 200 is performed very simply and quickly, the overall working time can be greatly reduced.

Although the present invention has been described by a limited embodiment and drawings, it is not limited by such an embodiment. That is, of course, various modifications and variations can be made by those skilled in the art within the scope of equivalents of the technical spirit of the present invention and the claims to be described below.

1: ground 1a: drilling hole
10: casing 11: grout outflow hole
20: sealing stopper 30: packer
31a; quick fix injection hole 31b: vertical hole
31c: horizontal hole 32: expansion member
40: Grout injection pipe 41: Quick payment injection pipe
100: grout injection device 200: air / water discharge means
210: discharge hose 220: hose connector
221: discharge hole 222,301,302: locking jaw
230: filter member 231: fixing means
300: auxiliary connector 300a: locking protrusion

Claims (7)

delete delete A casing 10 made of a hollow tube body inserted into the drilling hole 1a formed in the ground 1 and having a plurality of grout outflow holes 11 formed on the outer surface;
A sealing stopper 20 coupled to the upper end of the casing 10 to seal the casing 10 and the inlet of the perforation hole 1a;
A packer 30 inserted and installed inside the casing 10 at predetermined intervals to create a plurality of compartmental spaces;
It is configured to include a sealing stopper 20 and a grout injection pipe 40 installed through the packer 30 so that the tip is positioned in a plurality of compartments formed by the packer 30 to inject grout, respectively. In the grouting injection device to be,
It is installed to communicate with the outside in the plurality of compartments formed in the packer 30, but further configures an air / water discharge means 200 capable of filtering out large particles of grout and discharging only air and water when grout is injected ,
When grout is injected, large particles of the grout injected into the casing 10 through the grout injection pipe 40 are filtered out and only the air and water contained in the grout are discharged to the outside, so the loss of grout is small and the curing time of the grout is reduced due to the discharge of air and water. At the same time as this is shortened, a ground improvement body with better strength can be obtained,
The air/water discharge means 200,
When the quick filler is injected through the quick filler injection hole 31a provided in the monolithic cylindrical packer support 31, the expandable member 32 expands to the expandable packer 30 that seals the inside of the casing 10. formed integrally,
The lower part of the monolithic cylindrical packer support 31 is formed with a smaller diameter than the upper part, and a horizontal hole 31c communicating with the vertical hole 31b coupled to the lower end of the discharge hose 210 connected to the outside is formed on the side thereof. After forming, the filter member 230 equipped with the fixing means 231 is fixedly installed so that the horizontal hole 31c is wrapped,
When the grout is injected, the large particles of grout are removed by the filter member 230 constituting the air/water discharge means 200 integrally provided under the cylindrical packer support 31, which is a unitary body of the expandable packer 30. The grout characterized in that it is filtered and only the air and water contained in the grout are forcibly discharged to the outside through the horizontal hole (31c), the vertical hole (31b) communicating therewith, and the discharge hose (210) coupled to the vertical hole (31b). injection device. delete delete delete Inflatable packer 30 configured to seal the inside of the casing 10 while the expansion member 32 expands when the quick filler is injected through the quick filler injection hole 31a provided in the single-piece cylindrical packer support 31 Forming the lower part of the monolithic cylindrical packer support 31 with a smaller diameter than the upper part, and the horizontal hole 31c communicating with the vertical hole 31b to which the lower end of the discharge hose 210 connected to the outside is coupled to the side thereof. After formation, the filter member 230 equipped with the fixing means 231 is fixedly installed so that the horizontal hole 31c is covered, and the air/water discharge means 200 integrally equipped with the inflatable packer 30 is manufactured. step of doing;
A predetermined number of grout injection pipes 40 are inserted and installed through the sealing stopper 20 and the packer 30, and at the same time, a discharge hose 210 and an air/water discharge means 200 are integrally provided. Expandable packer 30 Step of connecting and installing the air/water discharge means 200 and the expandable packer 30 at the same time by connecting them to the vertical holes 31b provided in the );
After the air/water discharge means 200 and the expandable packer 30 have been installed at the same time, the assembly is inserted into the casing 10 made of a hollow tubular body having a plurality of grout outlet holes 11 formed on the outer surface, and then the casing 10 ) completing the assembly of the grout injection device 100 by sealing the inlet with a sealing stopper 20;
Inserting and installing the assembled grout injection device 100 into the drilling hole 1a drilled in the ground 1, but sealing all the entrances of the drilling hole 1a;
The grout is forcibly injected through the grout injection pipe 40 using a grout injection pump to infiltrate the grout into the ground through a plurality of grout outflow holes 11 formed on the outer surface of the casing 10,
Large particles of grout are filtered out by the filter member 230 constituting the air/water discharge means 200 integrally provided at the bottom of the cylindrical packer support 31, which is a unitary body of the expandable packer 30, and Only the contained air and water are forcibly discharged to the outside through the horizontal hole 31c, the vertical hole 31b communicating therewith, and the discharge hose 210 coupled to the vertical hole 31b, thereby discharging air and water with little loss of grout. The grout construction method characterized in that it is made by performing the step of shortening the grout curing time and obtaining a ground improvement body with better strength.

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