KR102489112B1 - Connection method simultaneous injection steel pipe and construction method using it - Google Patents

Abstract

The present invention relates to a joint-type simultaneous injection steel pipe and a construction method using the same, which enable accurate construction by providing a separate nailing member at a front end of a simultaneous injection steel pipe to firmly support the steel pipe penetrated into the ground. The joint-type simultaneous injection steel pipe is composed of a grouting steel pipe, a grouting hole, a multiple injection pipe, and a center injection pipe.

Description

Connection method simultaneous injection steel pipe and construction method using it {Connection method simultaneous injection steel pipe and construction method using it}

The present invention relates to a joint-type co-injection steel pipe and a construction method using the same, and more particularly, by providing a separate nailing member at the front end of the co-injection steel pipe to firmly support the steel pipe penetrating into the ground, so that accurate construction is possible. It relates to a connection type simultaneous injection steel pipe and a construction method using the same.

In general, grout or grouting is used to reinforce the bearing capacity of excavated ground when constructing tunnels in civil engineering works, or to inject filling materials into cracks and cavities in the ground for leak prevention work and soil stabilization. The filling material (also called 'grouting material') is filled using gravity or a pump.

In this grouting method, a steel pipe is installed in the ground and a packer is installed inside the steel pipe to inject and solidify the grouting material, thereby making the steel pipe and the ground integral and increasing the shear strength of soil and rock. Therefore, it is a very advantageous construction method in terms of constructability and economic feasibility.

In general, the steel pipe grouting method consists of drilling soft ground, inserting a steel pipe with a strainer into the drilling hole, inserting a sealing material between the steel pipe and the drilling hole, and injecting cement while installing a packer.

However, since this method inserts the steel pipe after drilling, it is difficult to insert the steel pipe due to collapsing of the drilling hole and mixing of foreign substances in the soft soil ground where the drilling hole is difficult to maintain, and the practicality is poor.

In order to solve this problem, a direct drilling device for inserting a steel pipe at the same time as drilling has been developed.

1 is a plan view showing the structure of a co-injected steel pipe with a conventional nailing member.

As shown in FIG. 1, the conventional co-injection steel pipe with a nailing member is a co-injection steel pipe having a nailing member that penetrates into the ground and allows grouting to be performed to reinforce the ground, A plurality of grouting holes are formed to form rows on the outer surface, a hollow 11 is formed inside, and a steel pipe body 10 penetrated at a certain depth into the ground, and the hollow 11 inside the steel pipe body 10 Including a partition 20 installed in the hollow 11 of the steel pipe body 10 so that it can be selectively partitioned, but the partition 20 is spaced apart at a predetermined interval along the longitudinal direction of the steel pipe body 10 The first support plate 21 installed along the radial direction of the steel pipe body 10 inside the hollow 11, and the steel pipe body inside the hollow 11 at a position spaced apart from the first support plate 21 by a predetermined distance ( 10) installed in the space between the second support plate 22 installed along the radial direction and the first support plate 21 and the second support plate 22 to the first support plate 21 and the second support plate 22 The inner surface and the side surface of the steel pipe body 100 are in close contact with each other by being pressurized by the elastic member 23 for partitioning the hollow 11, and the first support plate 21 for moving the first support plate 21 to the outer surface. The first injection pipe 24 fixedly coupled to be movable and into which the grouting liquid is injected, and the second support plate 22 to be movable so that the second support plate 22 is fixedly coupled to the outer surface of the first injection pipe 24 It consists of a second injection pipe 25 provided on the outer surface of.

The steel pipe body 10 is formed to have a circular cross section, and a hollow 11 is provided inside the steel pipe body 10 so that the grouting liquid can flow out after filling the inside, and is formed as a tubular member having a certain length. In addition, a plurality of grouting holes 10a are formed through the outer surface of the steel pipe body 10.

The partition 20 serves to divide the hollow 11 into a plurality of spaces, and includes a first support plate 21, a second support plate 22, an elastic member 23, and first and second injection pipes 24, 25) is composed of

The first support plate 21 is fixed to the outer surface of the first injection pipe 24, and the second support plate 22 is fixed to the outer surface of the second injection pipe 25. Disposed inside the injection pipe 25, the first support plate 21 and the second support plate 22 move in a mutually approaching direction and press the elastic member 23 provided therebetween so that a plurality of hollows 11 are formed. is divided into spaces of

In addition, a plurality of through holes 24a and 25a are formed through the outer surfaces of the first injection pipe 24 and the second injection pipe 25, respectively, and the grouting liquid injected through the first injection pipe 24 is partitioned into a hollow cavity. (11) can be made to flow out.

The nailing member 30 serves to support the steel pipe body 10 penetrated into the ground by being fixedly coupled to the outer surface of the front end of the steel pipe body 10 by welding or the like.

However, in the conventional co-injection steel pipe having a nailing member, as described above, since the nailing member is fixed to the outer surface of the steel pipe by welding or the like, the nailing member is fixed according to the penetration depth of the steel pipe. Not only is construction inconvenient because the position cannot be changed, but also there is a problem in that the nailing member cannot be recycled because the nailing member is fixedly joined to the outer surface of the steel pipe.

In addition, in order to partition the hollow 11 of the steel pipe body 10 into a plurality of spaces, the first injection pipe 24 and the second injection pipe 25 protruding to the outside of the steel pipe body 10 are moved to When the support plate 21 and the second support plate 22 move in a direction close to each other and press the elastic member 23, the elastic member 23 disposed in a position close to the area protruding to the outside of the steel pipe body 10 The pressing force for pressing may be formed strong, but the pressing force for pressing the elastic member 23 located at a distance from the area protruding to the outside of the steel pipe body 10 may be formed relatively weak.

Therefore, since the pressing force applied to the extension member 23 located at a distance from the area protruding to the outside of the steel pipe body 10 is lowered, the deformation of the extension member 23 is not properly performed, so the side and side of the extension member 23 As the adhesion with the inner surface of the steel pipe body 10 is lowered, when the grouting liquid is injected through the first injection pipe 24, the pressure does not act evenly, and as a result, the simultaneous injection steel pipe with the nailing member is accurately constructed. There is a problem with not being able to.

Republic of Korea Patent No. 10-0478321

The present invention enables the position of the nailing member provided at the front end of the co-injection steel pipe to be moved according to the penetration depth of the steel pipe, thereby improving the convenience of construction and freedom of design, and at the same time enabling the attachment and detachment of the nailing member. The object of the present invention is to enable recycling of the nailing member.

The present invention is characterized in that it is a connection type co-injection steel pipe capable of reinforcing the ground by penetrating into the ground and performing grouting, and a construction method using the same.

In one embodiment, the joint-type co-injection steel pipe includes a grouting steel pipe formed into a tubular shape and formed to be inserted into the ground, and a grouting liquid injected into the grouting steel pipe to be injected between the drilled hole and the outer surface of the grouting steel pipe to the outer surface of the grouting steel pipe. A plurality of grouting holes, a plurality of injection pipes installed to pass through the partitioning means inside the grouting steel pipe to inject grouting liquid into the partitioned internal space, and an expansion member by pulling the moving plate toward the fixed plate. It consists of a center injection pipe formed in the center of the inside of the grouting steel pipe so that the pipe expands. Nailing means to do; and division means installed at regular intervals along the lengthwise direction inside the grouting steel pipe to divide the internal space into a plurality of places. A nailing member to be formed, a member fixing plate formed to be screwed to the outer surface of the nailing member so that the pipe surface contacts the outer surface of the ground to support the grouting steel pipe, and a screw to the outer surface of the nailing member to prevent the member fixing plate from moving. It is made of a member fixing nut fastened so that one side thereof presses the member fixing plate, and the partitioning means is fixed along the radial direction of the grouting steel pipe inside the grouting steel pipe at a position spaced at a predetermined interval along the longitudinal direction of the grouting steel pipe. A fixing plate installed and formed to be installed and disposed along the radial direction of the grouting steel pipe at a position spaced apart from the fixing plate at a predetermined distance, and fixed to the outer surface of the multiple injection pipe to be movable along the longitudinal direction of the grouting steel pipe A movable plate and an elastic member installed in a space between the fixed plate and the movable plate, pressurized when the movable plate moves toward the fixed plate, and formed to divide the inside of the grouting steel pipe by bringing the inner surface and the side of the grouting steel pipe into close contact. And, in order to fix the fixing plate to the hollow of the grouting steel pipe, the inner surface of the grouting steel pipe is press-compressed so that the side surface of the grouting steel pipe is bent and protrudes inward, so that one side surface of the fixing plate is contacted and fixed. It is made of either a fixing protrusion or a fixing nipple fixedly formed so that one side surface of the fixing plate is in contact with a plurality of places on the inner surface of the grouting steel pipe so as to fix the fixing plate to the inside of the grouting steel pipe, and the outer end of the rear end of the grouting hole A caulking packer formed to seal the gap between the grouting steel pipe and the drilling hole when the caulking liquid is injected, and a caulking packer formed on the inner end surface of the drilling hole to fix the grouting steel pipe at the inner end of the drilling hole when the grouting steel pipe is inserted. A steel pipe fixing member to be, An end cover installed to cover the opening at the rear end of the grouting steel pipe, at least one spacer installed along the outside of the grouting steel pipe and formed to support the grouting steel pipe in a drilled hole, and one end of the grouting steel pipe and the other end cover. One side of the center injection pipe to connect the connection socket formed by screwing to one end of the grouting steel pipe on one side and one end of the grouting steel pipe on the other side for connection with the grouting steel pipe, and the center injection pipe formed inside when the grouting steel pipe is connected. It is characterized in that it consists of a connection fitting formed of.

In another embodiment, the connected co-injection steel pipe further includes a plurality of steel pipe fixing means detachably formed from the outer surface of the grouting steel pipe to fix the inner surface of the grouting steel pipe to the inner surface of the drilled hole of the grouting steel pipe, and the steel pipe fixing means comprises the outer surface of the grouting steel pipe. One side of the fixed dividing member inserted into the grouting steel pipe, which is divided into a plurality of pieces so as to be adjustable to fit the outer diameter of the grouting steel pipe when inserted into the grouting steel pipe, and the fixed dividing member inserted into the protruding groove to be adjusted by being fluidized to fit the diameter of the grouting steel pipe. A spacer protrusion formed by a spacer, a protrusion groove formed on the other side of the fixed dividing member so that the spacer protrusion can be inserted and adjusted to fit the diameter of the grouting steel pipe, and a steel pipe insertion hole formed in the center of the fixed dividing member so that it can be inserted into the outer surface of the grouting steel pipe And, an adhesion tube formed on the outer surface of each fixed dividing member to fill the space between the fixed dividing member and the drilling hole when inserted into the drilling hole, and an upper injection pipe and a lower injection pipe for injecting air into the contact tube side An injection nozzle formed on one side of each adhesion tube so that it can be attached and detached, an air injection pipe formed of a flexible tube to inject air into the adhesion tube side by being detachable from the injection nozzle, and expanded by air injected into the adhesion tube A pressure sensor formed on one side of each fixed dividing member to sense the pressure applied when the adhesion tube is in contact with the perforation hole, and formed on the outer surface of the adhesion tube so that the outer surface of the adhesion tube and the inner surface of the perforation hole are bonded when the adhesion tube is inflated It is characterized in that it is made of a capsule binder formed so that the binder flows between the close tube and the inner surface of the perforation hole when broken by a certain pressure.

As described above, by allowing the position of the nailing member provided at the front end of the co-injection steel pipe to be moved according to the penetration depth of the steel pipe, the convenience of construction and the freedom of design are improved, and at the same time, the nailing member can be attached and detached. To provide the effect of enabling the recycling of the nailing member.

In addition, the inside of the steel pipe is accurately divided into a plurality of spaces so that the sealing force is maintained in each space, so that grouting can be properly performed for each section.

In addition, by injecting the grouting liquid into the partitioned steel pipe so that the pressure into which the grouting liquid is injected acts uniformly during grouting, the co-injection steel pipe can be accurately constructed.

In addition, by enabling the separation and assembly of the steel pipe body, it has an effect of improving workability and construction speed even in a construction site in a narrow space.

1 is a view showing the structure of a conventional co-injection steel pipe.
2a, 2b and 2c are views of the co-injection steel pipe of the present invention.
3 is a connection state diagram for the simultaneous injection steel pipe of the present invention.
4 is a view showing the nailing means of the co-injection steel pipe of the present invention.
5 is a view showing a steel pipe fixing means that is another embodiment of the co-injection steel pipe of the present invention.
FIG. 6 is a detailed view of FIG. 5 .
7 is a view showing a rolling guide means, which is another embodiment of the co-injection steel pipe of the present invention.
8 is a detailed view of FIG. 7 .
9 is a view showing a multi-joint fixing means, which is another embodiment for the simultaneous injection steel pipe of the present invention.
FIG. 10 is a detailed view of FIG. 9 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention which follows refers to the accompanying drawings which illustrate, by way of illustration, specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable one skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different from each other but are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in another embodiment without departing from the spirit and scope of the invention in connection with one embodiment. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description set forth below is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all equivalents as claimed by those claims. Like reference numbers in the drawings indicate the same or similar function throughout the various aspects.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figure 1 is a view showing the structure of a conventional simultaneous injection steel pipe 100, Figures 2a, 2b, 2c is a view of the simultaneous injection steel pipe of the present invention, Figure 3 is a connection state diagram for the simultaneous injection steel pipe of the present invention, 4 is a view showing the nailing means 120 of the co-injection steel pipe 100 of the present invention.

As shown in the figure, the co-injection steel pipe 100 is characterized in that it has a nailing member 121 that penetrates into the ground and allows grouting to be performed so as to reinforce the ground.

The simultaneous injection steel pipe 100 includes a grouting steel pipe 110, a grouting hole 111, a multiple injection pipe 112, a center injection pipe 113, a caulking packer 160, a steel pipe fixing member 170, an end cover ( 180), a spacer 190, a connection socket 191, and a connection fitting 192.

The grouting steel pipe 110 is formed in a tubular shape and is formed to be inserted into the ground.

The grouting hole 111 is formed so that the grouting liquid injected into the grouting steel pipe 110 is injected between the drilling hole and the outer surface of the grouting steel pipe 110, and the grouting hole 111 is formed on the outer surface of the grouting steel pipe 110. It is characterized in that it is formed in plurality.

The multiple injection pipe 112 is installed to pass through the partitioning means 140 inside the grouting steel pipe 110 so that the grouting liquid is injected into the partitioned internal space. The multiple injection pipe 112 is a grouting steel pipe ( 110) It is characterized in that a plurality is formed inside.

The center injection pipe 113 is formed to expand the elastic member by pulling the movable plate toward the fixed plate, and the center injection pipe is formed in the center of the grouting steel pipe.

The co-injection steel pipe 100 is composed of a nailing means 120 and a partitioning means 140.

The nailing means 120 is movable on one side of the outer surface of the grouting steel pipe 110 and is detachably provided to support the grouting steel pipe 110 penetrated into the ground.

The nailing means 120 is composed of a nailing member 121, a member fixing plate 122, and a member fixing nut 123.

The nailing member 121 is characterized in that it is inserted into the outer surface of the grouting steel pipe 110 and formed in a tubular shape with a thread formed on the outer surface.

The member fixing plate 122 is screwed to the outer surface of the nailing member 121 so that the pipe surface contacts the outer surface of the ground to support the grouting steel pipe 110.

The member fixing nut 123 is to prevent the movement of the member fixing plate 122, and the member fixing nut 123 is screwed to the outer surface of the nailing member 121 so that one side of the member fixing plate 122 ) characterized in that it is formed to press.

The partitioning means 140 is installed inside the grouting steel pipe 110 at regular intervals along the longitudinal direction to divide the internal space into a plurality of locations.

The partitioning means 140 includes a fixed plate 141, a movable plate 142, an elastic member 143, a fixed nipple 144, and a fixed protrusion 145.

The fixing plate 141 is installed and formed to be fixed along the radial direction of the grouting steel pipe 110 inside the grouting steel pipe 110 at a position spaced apart at a predetermined interval along the length direction of the grouting steel pipe 110.

The movable plate 142 is disposed along the radial direction of the grouting steel pipe 110 inside the grouting steel pipe 110 at a position spaced apart from the fixed plate 141 by a certain distance, and along the longitudinal direction of the grouting steel pipe 110. It is characterized in that it is movably fixed to the outer surface of the multiple injection pipe 112.

The movable plate is moved by pulling the center injection pipe, and in the drawing of the present invention, it is a pulling type and consists of a fixed protrusion or a fixed nipple, a fixed plate, an elastic member, and a movable plate in the order inside the grouting steel pipe. In the case of the pushing type, the grouting Inside the steel pipe, the movable plate, the elastic member, the fixed plate, the fixed protrusion or the fixed nipple are made in order.

The elastic member 143 is installed in the space between the fixed plate 141 and the movable plate 142, and pressurized when the movable plate 142 moves toward the fixed plate 141, so that the grouting steel pipe 110 It is characterized in that the inside of the grouting steel pipe 110 is formed so as to be partitioned by being in close contact with the inner surface and the side surface of the.

The fixing nipple 144 is such that one side of the fixing plate 141 is in contact with a plurality of places on the inner surface of the grouting steel pipe 110 so that the fixing plate 141 can be fixed inside the grouting steel pipe 110. It is characterized by fixed formation.

The fixing protrusion 145 is press-compressed so that the side surface of the grouting steel pipe 110 is bent on the inner surface of the grouting steel pipe 110 so that the fixing plate 141 can be fixed to the hollow of the grouting steel pipe 110. By protruding inward, it is characterized in that one side surface of the fixing plate 141 is formed so that it is fixed in contact with it.

The caulking packer 160 is installed outside the rear end of the grouting hole 111, and the coating packer is formed to seal the gap between the grouting steel pipe 110 and the drilling hole when the caulking liquid is injected. do.

The caulking packer 160 is characterized in that it is applied or not applied depending on the construction situation.

The steel pipe fixing member 170 is formed to fix the grouting steel pipe at the inner end of the drilling hole when the grouting steel pipe is inserted. It is characterized in that it prevents from flowing upward by 5° to 15° when performing grouting, and prevents the phenomenon of being pushed back from the drilling hole due to pressure during grouting.

The steel pipe fixing member may be applied or not applied depending on the construction site and construction method.

The end cover 180 is characterized in that it is installed to cover the rear end opening of the grouting steel pipe 110.

At least one spacer 190 is installed along the outer side of the grouting steel pipe 110 and is formed to support the grouting steel pipe 110 in the drilled hole.

The connection socket 191 is formed to interconnect the grouting steel pipe formed on one side and the grouting steel pipe formed on the other side, and the connection socket is partially coupled to a screw thread formed around the outer circumference of one end of the grouting steel pipe on one side. It is characterized in that a part is coupled to the screw thread formed on the outer circumference of one side end of the grouting steel pipe on the other side.

The connection fitting 192 is characterized in that it is formed to connect any one center injection pipe among the center injection pipes formed inside when the grouting steel pipe is connected.

The drawings and their descriptions in the present invention are intended to show construction conditions for explaining the present invention, and the configuration conditions and configurations can be changed within the scope of the present invention according to the working environment or working conditions at the site.

5 is a view showing a steel pipe fixing means 200, which is another embodiment of the co-injection steel pipe 100 of the present invention, and FIG. 6 is a detailed view of FIG.

As shown in the figure, the steel pipe fixing means 200 is further included in the co-injection steel pipe 100, and the steel pipe fixing means 200 is used to fix the grouting steel pipe 110 to the inner surface of the drilled hole. (110) It is characterized in that a plurality is formed to be detachable from the outer surface.

The steel pipe fixing means 200 includes a fixed dividing member 210, a gap protrusion 211, a protrusion groove 212, a steel pipe insertion hole 213, a close-fitting tube 214, an air injection nozzle 215, an air injection pipe 216, a pressure sensor 217, and a capsule binder 218.

The fixed dividing member 210 is inserted into the outer surface of the grouting steel pipe 110, and when inserted into the grouting steel pipe 110, it is characterized in that it is divided into a plurality of pieces so as to be adjustable according to the outer diameter of the grouting steel pipe 110.

The spacer protrusion 211 is inserted into the protrusion groove 212 and is formed so as to be adjusted according to the diameter of the grouting steel pipe 110. The spacer protrusion 211 is formed on one side of the fixed dividing member 210. characterized by being

The protrusion groove 212 is formed so that the spacer protrusion 211 can be inserted to fit the diameter of the grouting steel pipe 110, and the protrusion groove 212 is formed on the other side of the fixed dividing member 210. to be characterized

The steel pipe insertion hole 213 is formed to be inserted into the outer surface of the grouting steel pipe 110, and the steel pipe insertion groove is formed in the center of the fixed dividing member 210.

The adhesion tube 214 is formed to fill the space between the fixed dividing member 210 and the drilling hole when inserted into the perforation hole to bring it into close contact. characterized by the formation of

The air injection nozzle 215 is formed such that an upper injection pipe and a lower injection pipe for injecting air toward the adhesion tube 214 are detachable, and the air injection nozzle 215 is attached to each adhesion tube 214 It is characterized in that it is formed on one side.

The air injection pipe 216 is characterized in that it is formed of a flexible pipe so as to inject air toward the adhesion tube 214 by attaching to and detaching from the injection nozzle.

The pressure sensor 217 is formed to sense the pressure applied when the adhesion tube 214 expanded by air injected into the adhesion tube 214 contacts the drilled hole, and the pressure sensor 217 is respectively It is characterized in that it is formed on one side of the fixed dividing member 210 of.

The capsule binder 218 is formed on the outer surface of the adhesion tube 214 so that the outer surface of the adhesion tube 214 and the inner surface of the perforated hole are bonded when the adhesion tube 214 is expanded, and is broken by a certain pressure, so that the binder is formed on the adhesion tube 214. It is characterized in that it is formed so as to flow between (214) and the inner surface of the perforation hole.

7 is a view showing a rolling guide means 300, which is another embodiment of the co-injection steel pipe 100 of the present invention, and FIG. 8 is a detailed view of FIG.

As shown in the drawing, the rolling guide means 300 is further included in the grouting steel pipe, and the rolling guide means 300 is positioned around the center of the grouting steel pipe 110 inserted into the drilling hole. It is characterized in that it is coupled to the grouting steel pipe 110 so that it can be formed.

The rolling guide means 300 includes a pipe insertion member 310, a pipe support protrusion 311, a first pipe fixing pad 312, a second pipe fixing pad 313, a guide support pipe 314, a tension spring ( 315), a guide bar 316, an entry buffer bar 317, an entry buffer hinge 618, and an insertion roller 319.

The pipe insertion member 310 is formed to be inserted into the outer circumferential surface of the grouting steel pipe 110, and the pipe insertion member 310 is characterized in that it forms a circular pipe.

The tube support protrusion 311 is formed in close contact with the outer circumferential surface of the grouting steel pipe 110 so that the tube insertion member 310 and the insertion tube body have the same original center. It is characterized in that a plurality is formed on the inner surface of the insertion member 310.

The first pipe fixing pad 312 is formed to support the pipe insertion member 310 so that the pipe insertion member 310 inserted into the grouting steel pipe 110 is not pushed in one direction, and the first pipe fixing pad 312 ) is characterized in that it is formed to be inserted into the corresponding position before inserting the tube insertion member 310 into the grouting steel pipe 110.

The second pipe fixing pad 313 is inserted after inserting the pipe insertion member 310 into the grouting steel pipe 110 to fix the pipe insertion member 310 inserted into the grouting steel pipe 110 so as not to fall out in the insertion direction. It is characterized in that the side surface is in contact with the pipe insertion member 310 and the inner surface is formed to be in close contact with the grouting steel pipe 110.

The guide support pipe 314 is formed so that the tension spring 315 can be built in, and the guide support pipe 314 is characterized in that a plurality is formed around the outer circumference of the pipe insertion member 310.

The tension spring 315 is built inside the guide support pipe 314 and is characterized in that it is formed so that the guide bar 316 can act as a buffer.

The guide bar 316 is formed such that one side is inserted into the guide support pipe 314 and is in contact with the tension spring 315, and the other side is formed to be coupled to the entry buffer 317 through a buffer hinge. to be

The entrance buffer bar 317 is formed to support the insertion roller 319, and one side is characterized in that it is connected to the guide bar 316 by the entrance buffer hinge 618.

The entrance buffer hinge 618 is formed to prevent damage to the insertion roller 319 by allowing the entrance buffer bar 317 to be bent at a certain angle when the grouting steel pipe 110 is inserted into the drilled hole. The hinge 618 is characterized in that it is formed for coupling between the entry buffer bar 317 and the guide bar 316.

When the grouting steel pipe 110 is inserted into the drilling hole, the insertion roller 319 is inserted along the inner center of the drilling hole so that the pipe insertion member 310 does not come into contact with the inner surface of the drilling hole. It is formed so that the insertion roller 319 is characterized in that it is formed on one side of the entry buffer bar 317.

9 is a view showing a multi-joint fixing number 400, which is another embodiment of the simultaneous injection steel pipe 100 of the present invention, and FIG. 10 is a detailed view of FIG.

As shown in the drawing, the multi-joint fixing manifold 400 is further included in the simultaneous injection steel pipe 100, and the multi-joint fixing manifold 400 is compressed by the roller inserted into the grouting steel pipe 110. It is characterized in that it is fixed to the inside of the drilled hole.

The multi-joint fixing number 400 includes a contact plate 410, a fixed hinge 411, a rotating bar, an multi-joint bar 412, an multi-joint hinge 413, a case insertion hole 414, a steel pipe defect hole 415 ), contact case 416, spring buffer groove 417, buffer spring 418, perforated side support 419, perforated side roller 420, steel pipe side support 421, steel pipe side roller 422 .

The close plate 410 is inserted into one end of the grouting steel pipe 110 in the center, and is characterized in that it is formed to be in close contact with the ground around the perforation hole.

The fixed hinge 411 is formed to enable rotation when the rotation bar is fixed to the close plate 410, and the fixed hinge 411 is characterized in that a plurality of fixed hinges 411 are formed on one side of the close plate 410.

The rotating bar is characterized in that one side is coupled to the fixed hinge 411 and formed to be rotatable, and the other side is formed so that the multi-joint bar 412 is coupled by the multi-joint hinge 413.

The multi-joint bar 412 is coupled to one side of the rotating bar by the multi-joint hinge 413, and is formed so that the close case 416 can be inserted into the space between the inner surface of the drilled hole and the grouting steel pipe 110, The multi-joint bar 412 is characterized in that formed in plurality so as to be mutually coupled by a plurality of multi-joint hinges 413.

The multi-joint hinge 413 is formed so that a plurality of multi-joint bars 412 can be rotated, and the multi-joint hinge 413 is coupled to mutually rotate between the plurality of multi-joint bars 412. characterized by the formation of

The case insertion hole 414 is formed so that the close contact case 416 can be inserted into the space between the inner surface of the drilled hole and the grouting steel pipe 110. Characterized in that it is formed through one side.

The steel pipe defect hole 415 is formed so that the grouting steel pipe 110 can be inserted and fixed to the close contact plate 410, and the steel pipe defect hole 415 is formed through the center of the close contact plate 410. to be

The close contact case 416 is formed to be inserted into the space between the grouting steel pipe 110 and the inner surface of the drilled hole, and the close close case 416 is coupled to one side of any one of the plurality of multi-joint bars 412. characterized by the formation of

The spring buffer groove 417 is formed so that the buffer spring 418 can be built in, and the spring buffer groove 417 is formed inside the close contact case 416.

The buffer spring 418 is built into the spring buffer groove 417 and is characterized in that it is formed so that the perforated side support 419 and the steel pipe side support 421 can be buffered.

The perforated side support 419 is formed to be buffered in the upper direction of the close contact case 416, and one side is inserted into the spring buffer groove 417, and the perforated side roller 420 is formed on the other side.

The perforation-side roller 420 is formed on one side of the perforation side support 419 and is formed to be rotated in close contact with the inner surface of the perforation hole.

The steel pipe side support 421 is formed to be buffered in the lower direction of the close case 416, and one side is inserted into the spring buffer groove 417, and the steel pipe side roller 422 is formed on the other side.

The steel pipe-side roller 422 is formed on one side of the steel pipe-side support 421 and is formed to rotate in close contact with the grouting steel pipe 110.

The above-described embodiments are for illustrative purposes, and those skilled in the art to which the above-described embodiments belong can easily transform into other specific forms without changing the technical spirit or essential features of the above-described embodiments. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected through this specification is indicated by the following claims rather than the detailed description above, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof. .

100: connected co-injection steel pipe
110: grouting steel pipe 111: grouting hole
112: multiple injection pipe 113: center injection pipe
120: nailing means 121: nailing member
122: member fixing plate 123: member fixing nut
140: division means 141: fixed plate
142: moving plate 143: elastic member
144: fixed nipple 145: fixed protrusion
160: caulking packer 170: steel pipe fixing member
180: end cover 190: spacer
191: connection socket 192: connection fitting
200: steel pipe fixing means 210: fixed dividing member
211: Interval protrusion 212: protrusion groove
213: steel pipe insertion hole 214: adhesion tube
215: air injection nozzle 216: air injection pipe
217: pressure sensor 218: capsule binder
300: rolling guide means 310: pipe insertion member
311: canal support protrusion 312: first canal fixing pad
313: second pipe fixing pad 314: guide support pipe
315: tension spring 316: guide bar
317: entry buffer bar 318: entry buffer hinge
319: insertion roller
400: multi-joint fixing means 410: contact plate
411: fixed hinge 412: multi-joint bar
413: multi-joint hinge 414: case insertion hole
415: steel pipe coupling hole 416: close contact case
417: spring buffer groove 418: buffer spring
419: perforation side support 420: perforation side roller
421: steel pipe support 422: steel pipe roller
423: rotation bar

Claims (3)

In the connection-type co-injection steel pipe that penetrates into the ground and allows grouting to be performed to reinforce the ground,
The joint-type simultaneous injection steel pipe,
A grouting steel pipe formed in a tubular shape to be inserted into the ground;
A plurality of grouting holes formed on the outer surface of the grouting steel pipe so that the grouting liquid injected into the grouting steel pipe is injected between the drilling hole and the outer surface of the grouting steel pipe;
A plurality of injection pipes formed inside the grouting steel pipe so as to pass through the partitioning means inside the grouting steel pipe to inject the grouting liquid into the partitioned internal space;
It consists of a center injection pipe formed in the center of the grouting steel pipe so that the expansion member expands by pulling the movable plate toward the fixed plate,
The joint-type simultaneous injection steel pipe,
a nailing means capable of being positioned on one side of the outer surface of the grouting steel pipe and detachably provided to support the grouting steel pipe penetrated into the ground; and
It is installed inside the grouting steel pipe at regular intervals along the length direction and consists of partitioning means for dividing the internal space into a plurality of places,
The nailing means,
A nailing member made of a tube with a thread formed on the outer surface and inserted into the outer surface of the grouting steel pipe;
A member fixing plate formed to be screwed to the outer surface of the nailing member so that the pipe surface is in contact with the outer surface of the ground to support the grouting steel pipe;
It is made of a member fixing nut screwed to the outer surface of the nailing member to prevent the member fixing plate from moving and one side is formed to press the member fixing plate,
The division means,
A fixing plate installed and formed to be fixed along the radial direction of the grouting steel pipe inside the grouting steel pipe at a position spaced apart at a predetermined interval along the length direction of the grouting steel pipe;
A movable plate disposed inside the grouting steel pipe at a position spaced apart from the fixed plate along the radial direction of the grouting steel pipe and fixed to the outer surface of the multiple injection pipe to be movable along the longitudinal direction of the grouting steel pipe;
An elastic member installed in a space between the fixed plate and the movable plate and pressurized when the movable plate moves toward the fixed plate so that the inner surface of the grouting steel pipe and its side surface are brought into close contact to partition the inside of the grouting steel pipe;
In order to fix the fixing plate to the hollow of the grouting steel pipe, a fixing protrusion formed on the inner surface of the grouting steel pipe so that the side surface of the grouting steel pipe is bent and projected inward so that one side surface of the fixing plate is contacted and fixed. or
It is made of one of fixing nipples fixedly formed so that one side surface of the fixing plate is in contact with a plurality of places on the inner surface of the grouting steel pipe so as to fix the fixing plate to the inside of the grouting steel pipe.
A caulking packer installed outside the rear end of the grouting hole and formed to seal the gap between the grouting steel pipe and the drilled hole when caulking liquid is injected;
A steel pipe fixing member formed on the inner end surface of the drilling hole to fix the grouting steel pipe at the inner end of the drilling hole when the grouting steel pipe is inserted;
An end cover installed to cover the rear end opening of the grouting steel pipe;
At least one spacer installed along the outer side of the grouting steel pipe and formed to support the grouting steel pipe in a drilled hole;
A connection socket formed by screwing at one end of the grouting steel pipe on one side and one end of the grouting steel pipe on the other side to connect to the grouting steel pipe on the other side,
It consists of a connection fitting formed on one side of the center injection pipe to connect the center injection pipe formed inside when the grouting steel pipe is connected.

The joint-type simultaneous injection steel pipe,
Further comprising a plurality of steel pipe fixing means formed detachably from the outer surface of the grouting steel pipe to fix the inner surface of the drilled hole of the grouting steel pipe,
The steel pipe fixing means,
A fixed dividing member inserted into the outer surface of the grouting steel pipe and divided into a plurality of pieces so as to be adjustable to the outer diameter of the grouting steel pipe when inserted into the grouting steel pipe;
Interval protrusions formed on one side of the fixed dividing member so that they can be adjusted by being inserted into the protrusion grooves and flowing according to the diameter of the grouting steel pipe;
A projection groove formed on the other side of the fixed dividing member so that spacing projections can be inserted to adjust to the diameter of the grouting steel pipe;
A steel pipe insertion hole formed in the center of the fixed dividing member so that it can be inserted into the outer surface of the grouting steel pipe;
A contact tube formed on the outer surface of each fixed dividing member to fill the space between the fixed dividing member and the drilling hole when inserted into the drilling hole, and
An injection nozzle formed on one side of each adhesion tube so that the upper injection pipe and the lower injection pipe are detachable for injecting air into the adhesion tube side;
An air injection pipe formed of a flexible pipe to inject air into the tight tube side by attaching to and detaching from the injection nozzle;
A pressure sensor formed on one side of each fixed dividing member to sense the pressure applied when the adhesion tube expanded by air injected into the adhesion tube contacts the perforation hole;
It is formed on the outer surface of the adhesion tube so that the outer surface of the adhesion tube and the inner surface of the perforation hole are bonded when the adhesion tube is inflated, and is formed of a capsule binder formed so that the binder flows between the adhesion tube and the inner surface of the perforation hole when broken by a certain pressure. jointed co-injection steel pipe.
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