KR102226393B1 - Reinforced steel pipe one shot grouting - Google Patents

Abstract

The present invention relates to a simultaneous injection steel pipe having a nailing member, which is inserted into the ground to enable grouting, thereby reinforcing the ground. The simultaneous injection steel pipe includes: a steel pipe body formed into a pipe shape to be inserted into the ground and having a plurality of grouting holes penetrated on the outer surface to form a line; an outer packer provided on the outer surface of the steel pipe body located near an inlet of the ground in a state, in which the steel pipe body is inserted in the ground, to shield the inlet of the ground from the outside; a dividing part installed in the steel pipe body to be spaced a predetermined distance apart in a longitudinal direction of the steel pipe body to divide an internal space; and a plurality of injection pipes installed to penetrate the dividing part in the steel pipe body to enable the injection of grouting liquid into the divided internal space. Therefore, since a position of a nailing member provided at the front end of the simultaneous injection steel pipe can be moved in accordance with a depth by which the steel pipe is inserted, the present invention is capable of improving convenience in construction and the degree of design freedom while enabling the recycling of the nailing member by enabling the attachment and detachment of the nailing member, and enabling the separation and assembly of the steel pipe body, thereby improving workability and a construction speed even in a confined construction site.

Description

Simultaneous injection steel pipe with nailing member {REINFORCED STEEL PIPE ONE SHOT GROUTING}

The present invention relates to a co-injection steel pipe with a nailing member, and in detail, by providing a separate nailing member at the front end of the co-injection steel pipe to firmly support the steel pipe penetrated into the ground, accurate construction is possible. It relates to a co-injected steel pipe provided with a nailing member so that it can be made.

In general, grout or grouting refers to reinforcing the support of the excavated ground when constructing tunnels in civil engineering works, or injecting fillers into cracks and cavities in the ground for leakage prevention work and soil stability. It means that the filling material (also referred to as'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 to make the steel pipe and the ground integral and to increase the shear strength of soil and rock. As it is performed, it is a very advantageous construction method in terms of constructability and economy.

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

However, since this method inserts a steel pipe after perforation, it is difficult to insert a steel pipe due to collapse of the perforated hole or mixing of foreign substances in a soft soil where it is difficult to maintain the perforated hole, and thus the practicality is inferior.

In order to solve this problem, a straight 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 conventional co-injected steel pipe having a nailing member.

As shown in Fig. 1, a conventional co-injection steel pipe with a nailing member is a co-injection steel pipe provided with a nailing member to reinforce the ground by penetrating into the ground and making grouting, A plurality of grouting holes are formed through the outer surface to form a row, a hollow 11 is formed therein, and a steel pipe body 10 that penetrates a certain depth into the inside of the ground, and the hollow 11 inside the steel pipe body 10 Including a partition portion 20 installed in the hollow 11 of the steel pipe body 10 so as to be selectively partitioned, the partition portion 20 is at a position spaced apart at a predetermined interval along the length 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) is installed in the space between the second support plate 22 and the first support plate 21 and the second support plate 22 installed along the radial direction of the first support plate 21 and the second support plate 22 The first support plate 21 is placed on the outer surface so that the inner surface and the side surface of the steel pipe body 100 are in close contact with each other to partition the hollow 11 and the first support plate 21 is movable. The first injection pipe 24 into which the grouting solution is injected and the second support plate 22 are fixedly coupled to the outer surface so that the second support plate 22 is movable, and the first injection pipe 24 is fixedly coupled and movable. 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 be discharged to the outside after being filled inside, and formed of a tubular member having a predetermined length. And, 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 the first support plate 21 and the second support plate 22 and the elastic member 23 and the first and second injection pipes 24, 25).

The first support plate 21 is fixed to the outer surface of the first injection pipe 24, the second support plate 22 is fixed to the outer surface of the second injection pipe 25, and the first injection pipe 24 is The first support plate 21 and the second support plate 22 are disposed inside the injection pipe 25 to move in a direction close to each other, and press the elastic member 23 provided therebetween, thereby forming a plurality of hollows 11. It is divided into the space of.

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

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 co-injection steel pipe having such a conventional nailing member, as described above, since the nailing member is fixed to the outer surface of the steel pipe by welding, etc., depending on the penetration depth of the steel pipe, the nailing member Since the position cannot be changed, construction is inconvenient, and since the nailing member is fixedly bonded to the outer surface of the steel pipe, there is a problem that the nailing member cannot be recycled.

And, in order to divide 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. 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 Although the pressing force for pressing may be formed strongly, 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 weakly.

Therefore, since the pressing force applied to the elastic member 23 located at a distance from the area protruding to the outside of the steel pipe body 10 is lowered, the elastic member 23 is not properly deformed, so that the side surface of the elastic member 23 As the adhesion to the inner surface of the steel pipe body 10 decreases, when the grouting solution is injected through the first injection pipe 24, the pressure does not work evenly, and as a result, the simultaneous injection steel pipe provided with the nailing member is accurately constructed. There is a problem that it does not work.

The present invention has been derived to solve the above problems, and improves the convenience of construction and design freedom by allowing the position of the nailing member provided at the front end of the co-injected steel pipe to be moved according to the depth at which the steel pipe is penetrated. It is an object of the present invention to provide a co-injected steel pipe with a nailing member capable of allowing the nailing member to be recyclable by allowing the nailing member to be detached and attached at the same time.

In order to solve the above problems, the present invention is a simultaneous purchase steel pipe provided with a nailing member that can reinforce the ground by penetrating into the ground to perform grouting, and is formed in a tubular shape, inserted into the ground, and installed on the outside surface. A steel pipe body formed through a plurality of grouting holes to form a row; An external packer provided on an outer surface of the steel pipe body located at the entrance side of the ground while the steel pipe body penetrates the ground so as to shield the entrance side of the ground from the outside; A partition portion installed inside the steel pipe body at a predetermined interval along the longitudinal direction of the steel pipe body to partition the inner space; A plurality of injection pipes installed to pass through the partition portion inside the steel pipe body so that the grouting liquid is injected into the partitioned inner space; It proposes a simultaneous injection steel pipe provided with a nailing member characterized in that it includes.

Here, a nailing member may be provided on one side of the outer surface of the steel pipe body, which is movable and detachably provided to support the steel pipe body penetrated into the ground.

In addition, the nailing member is inserted into and fixed to the outer surface of the steel pipe body, a tubular nailing bolt having a thread on the outer surface, and screwed to the outer surface of the nailing bolt so that the plate surface is in contact with the outer surface of the ground. It may include a plate-shaped acupressure plate supporting the body, and a fixing nut that is screwed to the outer surface of the nailing bolt to prevent the flow of the acupressure plate and pressurizes the acupressure plate.

In addition, a screw hole is formed through an end of the nailing bolt, and a fixing bolt is fastened to the screw hole so that the nailing bolt may be fixed to the outer surface of the steel pipe body.

In addition, the screw hole and the fixing bolt may be provided in a plurality of locations on the outer surface of the end of the nailing bolt at a position opposite to each other.

And, when the ground entrance side is shielded by the external packer, one end is located in the space and the other end is formed to extend to the outside of the ground so that the air filled in the space between the steel pipe body and the ground can be discharged to the outside. A separate air vent pipe can be installed.

In addition, a pair of partitions may be disposed inside the steel pipe body in an area in which the outer packer is provided.

In addition, the plurality of injection pipes may have different lengths so that their ends are located in each of the internal spaces so that the grouting liquid can be injected into each of the internal spaces partitioned by the partition.

And, the partition portion is a fixed plate fixedly installed along the radial direction of the steel pipe body inside the steel pipe body at a position spaced apart at a predetermined interval along the length direction of the steel pipe body, and a position spaced apart from the fixed plate at a predetermined interval. A moving plate disposed in the inside of the steel pipe body along the radial direction of the steel pipe body and fixed to the outer surface of the injection pipe so as to be movable along the length direction of the steel pipe body, and in a space between the fixed plate and the moving plate, respectively It may include an elastic member that is installed and pressurized when the moving plate is moved toward the fixed plate so that the inner surface of the steel pipe body and its side are in close contact with each other to partition the inside of the steel pipe body.

In addition, in order to fix the fixing plate to the inside of the steel pipe body, a fixing nipple protruding may be provided at a plurality of locations on the inner surface of the steel pipe body so that one side of the fixing plate is in contact and fixed.

In addition, to fix the fixing plate to the hollow of the steel pipe body, the inner surface of the steel pipe body is press-compressed so that the side of the steel pipe body is bent and protrudes inward, so that one side of the fixing plate is in contact and fixed. A fixing protrusion may be provided.

And, the right side of the fixing plate is in contact with the fixing nipple or the fixing protrusion, and at the entrance of the steel pipe body, a pressing means capable of pressing the elastic member while the injection pipe is drawn into the inside of the steel pipe body may be provided. have.

In addition, the pressing means is a fixing member fixedly coupled to the inlet of the steel pipe body and formed through a screw hole having a screw thread in the center, and the moving plate is screwed into the screw hole to move the injection pipe so that the moving plate A compression bolt to be pressurized, and the injection pipe provided between the injection pipe and the compression bolt so that one end extends through the compression bolt and the movable plate is fixed to the other end is inserted, and one side of the outer surface is stepped. It may include a first auxiliary injection pipe through which the end of the compression bolt is caught, and a plurality of second auxiliary injection pipes having a plurality of the injection pipes inserted therein and extending through the fixing member.

In addition, the left side of the fixing plate is in contact with the fixing nipple or the fixing protrusion, and at the entrance of the steel pipe body, a pressing means capable of pressing the elastic member while the injection pipe is drawn out of the steel pipe body is provided. I can.

And, a screw thread is formed on the outer surface of the end of the injection pipe, and the pressing means is fixedly coupled to the inlet of the steel pipe body, and a fixing member having a through hole penetrating through the center thereof, and inserted into the through hole and installed to move the injection pipe The movable plate may include a tension bolt having a thread formed on an inner surface of the moving plate to press the elastic member to be screwed into engagement with the thread of the injection pipe.

In addition, the steel pipe body is installed to be detachable and assembleable, the head pipe provided in the front along the direction in which the steel pipe body is inserted into the ground, and the steel pipe body is provided in the rear along the direction in which the steel pipe body is inserted into the ground. It is composed of a rear pipe that is assembled with the head pipe, and the injection pipe may be installed so as to be separated and assembled.

In addition, the head pipe and the tail pipe are inserted into the outer surface of the steel pipe body in a boundary region between the head pipe and the tail pipe, and may be connected by a ring-shaped connection socket having a predetermined width.

In addition, a female thread is formed on an outer surface of one of the leading pipe and the tail pipe, and a male thread meshed with the female thread is formed on the other inner surface, and thus may be screwed.

In addition, a part of the separated injection pipe may be disposed inside the head pipe, and a separate elastic member for dividing the inner space of the head pipe may be installed inside the head pipe.

In addition, the expansion and contraction member may be fixed to one inner side of the expansion and contraction member by a fixing nipple or a fixing protrusion protruding into the inside of the leading pipe.

In addition, the injection tube separated and disposed inside the head tube may be mutually assembled with the injection tube disposed inside the rear tube by a separate coupling member.

The co-injection steel pipe provided with the nailing member according to the present invention improves the convenience of construction and design freedom 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 depth at which the steel pipe is penetrated. At the same time, there is an effect that the nailing member can be recycled by enabling the attachment and detachment of the nailing member.

In addition, the inside of the steel pipe is precisely divided into a plurality of spaces so that the sealing force is maintained in each space, thereby making it possible to properly grout each division.

In addition, there is an effect of injecting grouting liquid into the divided steel pipes so that the pressure at which the grouting liquid is injected is uniformly applied during grouting, so that simultaneous injection steel pipes can be accurately constructed.

In addition, by allowing the steel pipe body to be separated and assembled, there is an effect of improving workability and construction speed even in a construction site in a narrow space.

1 is a plan view showing the structure of a steel pipe simultaneously injected with a conventional nailing member,
2 is a plan view showing the structure of a simultaneous injection steel pipe having a nailing member according to a first embodiment of the present invention,
3 is a plan view showing the structure of a steel pipe simultaneously injected with a nailing member according to a second embodiment of the present invention,
4 is a plan view showing the structure of a simultaneous injection steel pipe having a nailing member according to a third embodiment of the present invention,
5 is a plan view showing the structure of a simultaneous injection steel pipe having a nailing member according to a fourth embodiment of the present invention,
6 is a plan view showing the structure of a co-injected steel pipe having a nailing member according to a fifth embodiment of the present invention,
7 is an exploded perspective view showing the structure of a nailing member of a steel pipe simultaneously injected with a nailing member according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a plan view showing the structure of a conventional co-injection steel pipe having a nailing member, and FIG. 2 is a plan view showing the structure of a co-injection steel pipe having a nailing member according to a first embodiment of the present invention. 3 is a plan view showing the structure of a steel pipe for simultaneous injection with a nailing member according to a second embodiment of the present invention, and FIG. 4 is a plan view for simultaneous injection with a nailing member according to the third embodiment of the present invention. A plan view showing the structure of a steel pipe, FIG. 5 is a plan view showing the structure of a co-injected steel pipe having a nailing member according to a fourth embodiment of the present invention, and FIG. 6 is a plan view showing the structure of a steel pipe according to a fifth embodiment of the present invention. It is a plan view showing the structure of a co-injection steel pipe having a nailing member, and FIG. 7 is an exploded perspective view showing the structure of a nailing member of a co-injection steel pipe having a nailing member according to the present invention.

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As shown in these drawings, the simultaneous purchase steel pipe provided with the nailing member according to the present invention is a simultaneous purchase steel pipe provided with a nailing member capable of reinforcing the ground by penetrating into the ground and making grouting. As, a steel pipe body 100 formed in a tubular shape and inserted into the ground and formed through a plurality of grouting holes 110 to form a row on the outer surface; An outer packer 240 is provided on the outer surface of the steel pipe body 100 located at the entrance side of the ground while the steel pipe body 100 penetrates the ground so as to shield the entrance side of the ground from the outside. Wow; A partition unit 300 installed inside the steel pipe body 100 to be spaced apart at a predetermined interval along the length direction of the steel pipe body 100 to partition the inner space; It is configured to include a plurality of injection pipes 400 installed so as to pass through the partition portion 300 inside the steel pipe body 100 so that the grouting liquid is injected into the partitioned inner space.

The steel pipe body 100 is formed to have a certain length and penetrates the ground such as the ceiling or slope of the tunnel to reinforce the ground, thereby improving the structural stability of structures such as tunnels and slopes.

And, in order to further improve the structural stability of structures such as tunnels and slopes, the grouting liquid is filled in the inside of the steel pipe body 100 and then the grouting liquid flows out of the steel pipe body 100 to the inside of the ground. The ground around the body 100 and the steel pipe body 100 are integrally formed, and for this purpose, a plurality of grouting holes 110 are formed through the side surfaces of the steel pipe body 100.

The steel pipe body 100 is formed to have a circular cross section, and the inside of the steel pipe body 100 is provided with a hollow so that the gritting liquid can be discharged to the outside after being filled inside, and is formed of a tubular member having a predetermined length. .

The length of the steel pipe body 100 may be determined according to the strength of the ground to which the steel pipe is to be penetrated.In the case of a soft ground with relatively weak ground strength, the length of the steel pipe body 100 is formed to be long and penetrated to a deep depth. This should be done, and in the case of a relatively strong ground, it is preferable to shorten the length of the steel pipe body 100 so that the penetration depth is not deep so that easy penetration construction can be achieved.

The head of the steel pipe body 100 that is exposed to the outside when the steel pipe body 100 is penetrated into the ground is provided with an upper surface for shielding the hollow of the steel pipe body 100 from the outside, and an injection pipe 400 to be described later in the center of the upper surface. A through hole into which) is inserted is formed.

As shown in Fig. 6, the steel pipe body 100 is detachably installed and assembled to the front pipe 101 along the direction in which the steel pipe body 100 is inserted into the ground, and the steel pipe The body 100 is provided at the rear along the direction in which the body 100 is inserted into the ground and is composed of a rear tube 102 that is assembled with the leading tube 101, and the injection tube 400 may also be installed so that it can be separated and assembled. have.

The steel pipe body 100 can be selectively separated and assembled into a head pipe 101 disposed in the front and a tail pipe 102 disposed at the rear and connected to the head pipe 101, so that it can be created even at a construction site in a narrow space. There is an effect that can improve the performance and construction speed.

These head pipe 101 and tail pipe 102 are inserted and installed on the outer surface of the steel pipe body 100 in the boundary area between the head pipe 101 and the tail pipe 102 and have a ring-shaped connection socket 103 having a constant width. ), or a female thread is formed on the outer surface of one of the head pipe 101 and the tail pipe 102, and a male thread engaged with the female thread is formed on the inner surface of the other to be screwed. .

In the case of the structure in which the head pipe 101 and the tail pipe 102 are connected by a separate connection socket 103, it is applied when the head pipe 101 and the tail pipe 102 have a small diameter, and the head pipe 101 In the case of a structure in which) and the tail pipe 102 are screwed, it may be applied when the head pipe 101 and the tail pipe 102 have a large diameter.

In addition, a part of the separated injection pipe 400 is disposed inside the head pipe 101, and a separate elastic member 104 dividing the inner space of the head pipe 101 is disposed inside the head pipe 101. It is desirable to be installed.

This elastic member 104 is fixed to one side of the elastic member 104 by a fixing nipple 105 or a fixing protrusion protruding into the inside of the leading pipe 101 to prevent the expansion and contraction member 104 from flowing to the head. It is effective to keep the inner space of the tube 101 divided.

In addition, the injection pipe 400 separated and disposed inside the head pipe 101 is mutually assembled with the injection pipe 400 disposed inside the tail pipe 102 by a separate coupling member 401 do.

Various configurations are possible for connecting the injection pipe 400 disposed inside the head pipe 101 and the injection pipe 400 disposed inside the tail pipe 102, but in the case of the present invention, a coupling member ( 401) to be combined in a one-touch method.

On the other hand, as shown in FIG. 7, the nailing member 200 is inserted into the outer surface of the steel pipe body 100 and fixed, and a tubular nailing bolt 210 and a nailing bolt 210 having threads formed on the outer surface thereof. Screw on the outer surface of the nailing bolt 210 to prevent the flow of the plate-shaped pressure plate 220 and the pressure plate 220 to support the steel pipe body 100 by screwing the plate surface in contact with the outer surface of the ground It is fastened and one side is configured to include a fixing nut 230 for pressing the acupressure plate 220.

The nailing bolt 210 serves to fix the pressure plate 220 to one side of the outer surface of the steel pipe body 100 by being inserted and fixed to the outer surface of the steel pipe body 100. It is formed in a shape corresponding to the outer surface of the body 100 so that it can be inserted into the outer surface of the steel pipe body 100.

The nailing bolt 210 has a screw hole formed through one end of the nailing bolt 210, and a fixing bolt 212 is fastened to the screw hole 211 so that the nailing bolt 210 is a steel pipe body 100 It should be fixed to the outer surface of.

Therefore, in a state in which the end of the fixing bolt 212 is separated from the outer surface of the steel pipe body 100, it is effective to adjust the position where the nailing bolt 210 is disposed on the outer surface of the steel pipe body 100.

This allows the steel pipe body 100 to be accurately supported by the acupressure plate 220 by allowing the position at which the pressure plate 220 is disposed according to the degree of penetration of the steel pipe body 100 into the ground. In addition, there is an effect that allows efficient construction to be achieved by giving the degree of freedom of construction.

In addition, the screw hole 211 and the fixing bolt 212 are provided at a plurality of locations on the outer surface of the end of the nailing bolt 210 at positions opposite to each other, so that the nailing bolt 210 is It is desirable to be firmly fixed to the outer surface.

The acupressure plate 220 is a plate-like member, and in the center is formed through a through hole 221 formed with a nanasan so that the acupressure plate 220 can be fastened to the outer surface of the nailing bolt 210, and the acupressure plate 220 is a fixing nut ( It is formed to have a larger area than the cross-sectional area of 230) so that the flow can be prevented by the fixing nut 230, and it is in contact with the ground so that the steel pipe body 100 can be firmly supported.

The fixing nut 230 is fastened to the outer surface of the nailing bolt 210 in front of the pressure plate 220 so that the pressure plate 220 is firmly fixed to the outer surface of the nailing bolt 210 to prevent flow.

The fixing nut 230 is formed to have a cross-section of a polygonal shape, and it is effective to pressurize the acupressure plate 220 by using a separate tool to be firmly fastened to the outer surface of the nailing bolt 210.

A separate outer packer 240 is provided on the outer surface of the steel pipe body 100 located at the entrance side of the ground while the steel pipe body 100 is penetrated into the ground to shield the entrance side of the ground from the outside. have.

The external packer 240 shields the inlet side of the ground from the outside and is injected into the inside of the steel pipe body 100 and then flows out to the outside to prevent the grouting solution from flowing out to the outside through the inlet of the ground. Do it.

In addition, a pair of partitions 300 are provided inside the steel pipe body 100 in the area in which the outer packer 240 is provided so that the outer packer 240 can be accurately expanded to completely shield the entrance side of the ground from the outside. It is effective to arrange it in a way.

In addition, when the entrance side of the ground is shielded by the external packer 240, one end is located in the space and the other end is outside the ground so that the air filled in the space between the steel pipe body 100 and the ground can be discharged to the outside. It is preferable that a separate air vent pipe 250 is installed extending into the furnace.

On the other hand, the partition unit 300 is a fixed plate 310 that is fixedly coupled to be spaced apart at a predetermined interval so that the hollow inside the steel pipe body 100 can be largely divided, and a steel pipe at a position spaced apart from the fixed plate 310 by a predetermined distance. A pair of moving plates 320 provided to be movable along the length direction of the body 100, and an elastic member 330 provided between the fixed plate 310 and the moving plate 320 and elastically deformed by the pressing force. Consists of including.

The fixing plate 310 is formed in a disk shape having a certain thickness in a circular cross-section identical to the cross-section of the steel pipe body 100, and is installed to be fixed in the hollow along the length direction of the steel pipe body 100, and the elastic member 330 It serves to support one side of the company.

As shown in Fig. 2, one side of the fixing plate 310 located at the far left of the inner surface of the steel pipe body 100 so that the fixing plate 310 can be fixed to the hollow of the steel pipe body 100 A fixing nipple 350 that is in contact and fixed may be provided to protrude.

On one side of the fixing nipple 350 provided to protrude inward from the inner surface of the steel pipe body 100, the fixing plate 310 is attached to the fixing nipple 350 by bonding such as welding while the fixing plate 310 is seated. It can be fixed by

And, as shown in Figure 3, the inner surface of the steel pipe body 100 so that the fixing plate 310 can be fixed to the hollow of the steel pipe body 100 so that the side of the steel pipe body 100 is bent. The fixing protrusion 360 may be provided so that one side surface of the fixing plate 310 is in contact and fixed by being press-compressed and protruding inward.

On one side of the fixing protrusion 360 provided to protrude inward from the inner surface of the steel pipe body 100, the fixing plate 310 is fixed by bonding such as welding while the fixing plate 310 is seated. It can be fixed by

In the case of forming the fixing protrusion 360 on the steel pipe body 100, there is an effect that manufacturing is relatively easy compared to a method in which the fixing nipple 350 is provided on the inner surface of the steel pipe body 100.

In the case of the simultaneous injection steel pipe using the one-piece fixed fixing plate according to the first and second embodiments of the present invention as shown in Figs. 2 and 3, the fixing nipple 350 or the fixing protrusion 360 In a state in which the left side of the fixed plate 310 located on the left is in contact, the injection pipe 400 moves in the direction in which the steel pipe body 100 is introduced, so that the moving plate 320 presses the elastic member 330. To be able to.

And, in the case of the simultaneous injection steel pipe using the one-piece fixed fixing plate according to the third and fourth embodiments of the present invention as shown in Figs. 4 and 5, the fixing nipple 350 or the fixing protrusion 360 In a state in which the right side of the fixed plate 310 located at the far right is in contact, the injection pipe 400 moves in the direction in which the steel pipe body 100 is drawn out, and the moving plate 320 presses the elastic member 330 To be able to do it.

In this case, a separate outer tube 410 is disposed on the outer surface of the injection tube 400 having the longest length between the elastic member 330 and the elastic member 330, thereby reducing the pressing force due to the movement of the injection tube 400. By transmitting, the entire elastic member 330 is pressurized.

The moving plate 320 is formed in the same shape as the fixed plate 310, and a pair is disposed at a distance spaced apart from the fixed plate 310 to press the elastic member 330, so that the side of the elastic member 330 is made of a steel pipe. It serves to be arranged in close contact with the inner surface of the body 100 so that the hollow is accurately divided into a plurality of spaces.

The moving plate 320 is fixed to the outer surface of the injection pipe 400 by welding or the like so that the moving plate 320 can move toward the fixed plate 310 and pressurize the elastic member 330. By moving the 400, the injection pipe 400 is moved so that the moving plates 320 move toward the fixed plate 310, respectively, so that the elastic member 330 can be pressed.

When the grouting solution is injected through the injection pipe 400 by making the side of the elastic member 330 in close contact with the inner surface of the steel pipe body 100 by pressing the elastic member 330, the grouting solution is placed in each of the divided spaces. By filling it, the pressure at which the grouting liquid flows out of the steel pipe body 100 can be kept constant, so that grouting can be performed accurately and stably.

The elastic members 330 are disposed between the fixed plate 310 and the moving plate 320, respectively, and when they are pressed by the movement of the moving plate 320, they are elastically deformed and the height is lowered and the width is expanded, so that the steel pipe body 100 The inner surface and the outer surface of the elastic member 330 are in close contact with each other so that the grouting solution is accurately filled in each partitioned space.

In the injection pipe 400, the movable plate 320 is fixedly coupled to the outer surface to enable the movement of the movable plate 320, and the grouting liquid is injected into the inside of the steel pipe body 100 through the inner space to perform grouting. Plays a role.

To this end, the injection pipe 400 having the longest length among the plurality of injection pipes 400 is formed to extend to the inner end of the steel pipe body 100.

In addition, it is preferable that the plurality of injection pipes 400 are formed with different lengths so that their ends are located in respective internal spaces so that the grouting liquid can be injected into each internal space partitioned by the partition unit 300.

On the other hand, it is preferable that a pressing means 500 capable of accurately pressing the elastic member 330 is provided at the entrance of the steel pipe body 100 exposed to the outside of the ground during construction.

As shown in Figures 2 and 3, such a pressing means 500 is fixedly coupled to the inlet of the steel pipe body 100 and a fixing member 510 formed through a screw hole 511 having a screw thread in the center, A compression bolt 520 which is screwed into the screw hole 511 to move the injection pipe 400 so that the moving plate 320 presses the elastic member 330, the injection pipe 400 and the compression bolt 520 The first auxiliary injection pipe 530 provided between the one end extends through the compression bolt 520, the injection pipe 400 is inserted into the other end, and one side of the outer surface is formed stepped so that the end of the compression bolt 520 is caught. ), and a plurality of second auxiliary injection pipes 540 into which the plurality of injection pipes 400 are inserted and extend through the fixing member 510.

The fixing member 510 is a member that is fixedly joined to the entrance of the steel pipe body 100 exposed to the outside of the ground during construction by welding, etc., and a screw hole 511 having a thread formed on the inner surface is formed through the central region. Has been.

In addition, the circumference of the screw hole 511 is formed through the same number as the number of the second auxiliary injection pipes 540 to which the second auxiliary injection pipes 540 can be inserted and installed.

The compression bolt 520 is screwed into the screw hole 511 of the fixing member 510 to move the injection pipe 400 so that the moving plate 320 presses the elastic member 330.

The central area of the compression bolt 520 has a through hole through which the first auxiliary injection pipe 530 passes so that the first auxiliary injection pipe 530 can extend to the outside, and the head of the compression bolt 520 has a hexagonal A hexagonal groove for rotating the compression bolt 520 by inserting a tool such as a wrench is recessed.

The first auxiliary injection pipe 530 is provided between the injection pipe 400 and the compression bolt 520 so that one end extends through the compression bolt 520 and the movable plate 320 is fixed to the other end. ) Is inserted and one side of the outer surface is formed to be stepped so that the end of the compression bolt 520 is caught to enable pressure.

The grouting solution is injected into the injection pipe 400 through the first auxiliary injection pipe 530 extending to the outside of the fixing member 510 to grout the inner space formed at the farthest distance among the divided inner spaces of the steel pipe body 100 Let the liquid fill up.

The plurality of second auxiliary injection pipes 540 are inserted into the plurality of injection pipes 400 and extend through the fixing member 510, so that the grouting solution is injected into the remaining injection pipes 400, and the steel pipe body 100 The grouting solution is filled in the remaining internal space of the compartment.

As shown in Figures 4 and 5, this pressing means 500 is fixedly coupled to the inlet of the steel pipe body 100 and a fixing member 510 having a through hole formed therethrough in the center, and is inserted into the through hole and installed. Including a tension bolt 550 that has a thread formed on the inner surface so that the injection pipe 400 is moved so that the movable plate 320 presses the elastic member 330, and is screwed into engagement with the thread of the injection pipe 400. It is composed.

The pressing means 500 shown in FIGS. 2 and 3 pushes the injection pipe 400 into the inside of the steel pipe body 100 to pressurize the elastic member 330, whereas in FIGS. 4 and 5 The pressing means 500 is a method of pressing the elastic member 330 by pulling out the injection pipe 400 to the outside of the steel pipe body 100.

To this end, a thread is formed on the outer surface of the end of the injection pipe 400, and the end of the injection pipe 400 on which the thread is formed is screwed with a thread formed on the inner surface of the tension bolt 550, so that the injection pipe 400 is connected to the steel pipe body ( 100) to the outside.

In addition, as shown in FIGS. 4 and 5, the positions of the fixed plate 310 and the moving plate 320 are changed so that the expansion and contraction member 330 can be compressed when the injection pipe 400 is pulled.

That is, the fixing plate 310 is located on the leftmost side and the moving plate 320 is located on the most right side, and the right circumferential surface of the fixing plate 310 is fixed to the inner surface of the steel pipe body 100, and the steel pipe body It may be fixedly disposed by the fixing nipple 350 protruding at a predetermined interval along the radial direction of (100).

And, the inner surface of the steel pipe body 100 so that the fixing plate 310 can be fixed to the inner surface of the steel pipe body 100 is press-compressed so that the side of the steel pipe body 100 is bent and protrudes inward. A fixing protrusion 360 may be provided so that the right circumferential surface is in contact and fixed.

The tension bolt 550 is inserted into the through hole formed in the fixing member 510 and installed so as to be freely rotatable, and a thread is formed on the inner surface to engage with the thread formed at the end of the injection pipe 400 and fasten by screwing the tension bolt ( The injection pipe 400 is pulled to the outside of the steel pipe body 100 by rotation of 550 so that the elastic member 330 is joined to partition the interior of the steel pipe body 100.

The simultaneous injection steel pipe using the one-time fixed fixed plate according to the present invention having the configuration as described above is inserted into the interior of the ground, such as a slope or the ceiling of a tunnel, and the expansion and contraction member 330 is When pressing, the elastic member 230 disposed in a position close to the area protruding to the outside of the steel pipe body 100 and the elastic member 330 disposed in a relatively distant area are made to have a uniform pressing force. The side of the 330 may be in close contact with the inner surface of the steel pipe body 100 so that the hollow can be accurately partitioned.

In addition, after the grouting solution is filled in each of the divided hollows at a uniform pressure, the ground by the steel pipe body 100 is made to flow out into the ground at a uniform pressure through the grouting hole 110 formed in the steel pipe body 100. Can be reinforced.

In addition, by allowing the position of the nailing member 200 provided at the front end of the simultaneous injection steel pipe to be moved according to the depth at which the steel pipe is penetrated, the convenience of construction and design freedom are improved, and the nailing member can be attached and detached at the same time. So that the nailing member can be recycled.

Since the above is only described with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as well known, should not be limited to the above embodiments and should not be interpreted, It will be said that both the technical idea and the technical idea together with the fundamental are included in the scope of the present invention.

100: steel pipe body 110: grouting ball
200: nailing member 210: nailing bolt
220: acupressure plate 230: fixing bolt
300: compartment 310: fixed plate
320: moving plate 330: elastic member
350: fixing nipple 360: fixing protrusion
400: injection pipe 410: outer pipe
500: pressing means 510: fixing member
520: compression bolt 530: first auxiliary injection pipe
540: second auxiliary injection pipe 550: tension bolt

Claims (21)

As a simultaneous purchase steel pipe equipped with a nailing member to reinforce the ground by penetrating into the interior of the ground and making grouting,
A steel pipe body 100 formed in a tubular shape, inserted into the ground, and formed through a plurality of grouting holes 110 to form a row on an outer surface; An outer packer 240 is provided on the outer surface of the steel pipe body 100 located at the entrance side of the ground while the steel pipe body 100 penetrates the ground so as to shield the entrance side of the ground from the outside. Wow; A partition unit 300 installed inside the steel pipe body 100 to be spaced apart at predetermined intervals along the length direction of the steel pipe body 100 to partition the inner space; A plurality of injection pipes 400 installed so as to pass through the partition portion 300 inside the steel pipe body 100 so that the grouting liquid is injected into the partitioned inner space; Including,
The partition part 300 is a fixed plate fixedly installed along the radial direction of the steel pipe body 100 inside the steel pipe body 100 at a position spaced apart at a predetermined interval along the length direction of the steel pipe body 100 ( 310), and the fixed plate 310 is disposed in the inside of the steel pipe body 100 at a position spaced apart from the fixed plate 310 along the radial direction of the steel pipe body 100 and moves along the longitudinal direction of the steel pipe body 100 A movable plate 320 fixed to the outer surface of the injection pipe 400 is respectively installed in a space between the fixed plate 310 and the movable plate 320 so that the movable plate 320 is attached to the fixed plate It includes an elastic member 330 that is pressed when moving toward the (310) side so that the inner surface and the side surface of the steel pipe body 100 are in close contact so that the inside of the steel pipe body 100 is partitioned,
In order to fix the fixing plate 310 to the hollow of the steel pipe body 100, the inner surface of the steel pipe body 100 is press-compressed so that the side surface of the steel pipe body 100 is bent and protrudes inward, so that the fixed plate A fixing protrusion 360 is provided so that one side of the 310 is in contact and fixed,
The right side of the fixing plate 310 is in contact with the fixing protrusion 360, and at the entrance of the steel pipe body 100, the injection pipe 400 is drawn into the inside of the steel pipe body 100, and the elastic member ( A pressing means 500 capable of pressing 330 is provided,
The pressing means 500 is fixedly coupled to the inlet of the steel pipe body 100 and a fixing member 510 formed through a screw hole 511 having a screw thread in the center thereof, and screwed into the screw hole 511 A compression bolt 520 that moves the injection pipe 400 so that the moving plate 320 presses the elastic member 330, and is provided between the injection pipe 400 and the compression bolt 520 One end extends through the compression bolt 520 and the injection pipe 400 to which the moving plate 320 is fixed is inserted to the other end, and one side of the outer surface is formed to be stepped so that the end of the compression bolt 520 is caught Characterized in that it comprises a first auxiliary injection pipe 530 and a plurality of second auxiliary injection pipes 540 that are inserted into the plurality of injection pipes 400 and extend through the fixing member 510 Simultaneous purchase steel pipe with nailing member. The method of claim 1,
A nailing member, characterized in that a nailing member 200 is provided on one side of the outer surface of the steel pipe body 100 to support the steel pipe body 100 that is movable and detachably provided to penetrate the ground. One simultaneous purchase steel pipe. The method of claim 2,
The nailing member 200 is inserted into and fixed to the outer surface of the steel pipe body 100 and is screwed to the outer surface of the tubular nailing bolt 210 having a thread on the outer surface, and the plate surface One side is screwed to the outer surface of the nailing bolt 210 to prevent the flow of the plate-shaped pressure plate 220 and the pressure plate 220 in contact with the outer surface of the ground to support the steel pipe body 100 Simultaneous purchase steel pipe with a nailing member, characterized in that it comprises a fixing nut 230 for pressing the pressure plate 220. The method of claim 3,
A screw hole is formed through an end of the nailing bolt 210, and a fixing bolt 212 is fastened to the screw hole 211 so that the nailing bolt 210 is fixed to the outer surface of the steel pipe body 100. Simultaneous purchase steel pipe provided with a nailing member, characterized in that. The method of claim 4,
The screw hole 211 and the fixing bolt 212 are provided at a plurality of locations on the outer surface of the end of the nailing bolt 210 at positions opposite to each other. The method of claim 1,
When the ground entrance side is shielded by the external packer 240, one end is located in the space and the other end is outside the ground so that the air filled in the space between the steel pipe body 100 and the ground can be discharged to the outside. Simultaneous purchase steel pipe provided with a nailing member, characterized in that a separate air vent pipe 250 is installed extending into. The method of claim 6,
Simultaneous purchase steel pipe having a nailing member, characterized in that the partition portion (300) is arranged in a pair inside the steel pipe body (100) in the area where the external packer is provided. The method of claim 1,
Nailing, characterized in that the plurality of injection pipes 400 are formed with different lengths so that their ends are located in respective internal spaces so that the grouting solution can be injected into each internal space partitioned by the partition unit 300 Simultaneous purchase steel pipe with members. delete delete delete delete delete delete delete The method according to any one of claims 1 to 8,
The steel pipe body 100 is installed to be detachable and assembleable, and a leading pipe 101 provided in the front along the direction in which the steel pipe body 100 is inserted into the ground, and the steel pipe body 100 are attached to the ground. It is provided at the rear along the insertion direction and is composed of a tail pipe 102 that is assembled with the head pipe 101, and the injection pipe 400 is also provided with a nailing member, characterized in that it is installed so as to be detachable and assembleable. Simultaneous purchase steel pipe. The method of claim 16,
The head pipe 101 and the tail pipe 102 are inserted into the outer surface of the steel pipe body 100 in the boundary area between the head pipe 101 and the tail pipe 102 and have a ring shape having a constant width. Simultaneous purchase steel pipe having a nailing member, characterized in that connected by a connection socket (103). The method of claim 16,
A nailing member comprising a nailing member, characterized in that a female thread is formed on an outer surface of one of the leading pipe 101 and the tail pipe 102 and a male thread engaged with the female thread is formed on the other inner surface. Simultaneous purchase steel pipe. The method of claim 16,
A part of the separated injection pipe 400 is disposed inside the head pipe 101, and a separate elastic member 104 for dividing the inner space of the head pipe 101 inside the head pipe 101 Simultaneous purchase steel pipe provided with a nailing member, characterized in that installed. The method of claim 19,
The elastic member 104 is provided with a nailing member, characterized in that it is fixed to the inner side of the elastic member 104 by a fixing nipple 105 or a fixing protrusion protruding into the inside of the head pipe 101 Buy steel pipe. The method of claim 19,
The injection pipe 400 separated and disposed inside the head pipe 101 is mutually assembled with the injection pipe 400 disposed inside the tail pipe 102 by a separate coupling member 401 Simultaneous purchase steel pipe provided with a nailing member, characterized in that the.

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