Reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting and Steel pipe grouting construction method using reinforcing structure

Abstract

The reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting according to the present invention comprises: a steel pipe that extends in the longitudinal direction and is inserted into a bore hole; a connecting plug to which the steel pipe is connected on one side; and a plastic pipe that extends in the longitudinal direction and is connected to the other side of the connecting plug. The connecting plug comprises: a first connecting part connected to the steel pipe; a second connecting part connected to the plastic pipe; and a column part provided between the first connecting part and the second connecting part.

Description

Technology Field

[0001] The present invention relates to a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting and a method for steel pipe grouting using the reinforcing structure. More specifically, the invention relates to a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting and a method for steel pipe grouting using the reinforcing structure, wherein a steel pipe is connected to a connecting plug and inserted into a bore hole, and a plastic pipe is connected to the connecting plug after the steel pipe and the connecting plug are inserted into the bore hole, thereby preventing damage to the plastic pipe. Background Technology

[0002] Steel pipe grouting is implemented during tunnel excavation to prevent ground loosening around the planned tunnel cross-section and to block groundwater leakage. The steel pipe grouting method can be carried out by drilling around the planned tunnel excavation site, inserting steel pipes, and injecting grout.

[0003] Conventional steel pipe grouting methods involve drilling at an angle of more than 15 degrees upward from the tunnel excavation line to insert steel pipes. However, during this process, problems may arise where the grouting area widens due to the installation angle, or ground loosening and rock spalling occur, leading to weakened stability.

[0004] Accordingly, in order to avoid interference with drilling equipment and to satisfy the design limit conditions (5 to 15 degrees) according to the installation angle of the steel pipe, the excavation work was stopped before reaching the planned excavation cross-section (30) as shown in Fig. 1, and the drilling point for installing the steel pipe (10) was advanced in advance to drill the face (20) at an intermediate location and install the steel pipe (10).

[0005] Afterwards, grouting (11) was injected through the steel pipe (10), and additional excavation was performed using excavation equipment up to the planned excavation cross-section (30). When additional excavation is performed up to the planned excavation cross-section (30), the steel pipe (10) may be exposed as shown in Fig. 1, and the exposed steel pipe (12) was cut using special equipment such as an oxygen cutter.

[0006] However, conventional steel pipe grouting methods have the problem that it is difficult to easily cut the exposed steel pipe (12). Dozens of steel pipes (10) can be installed in the excavation cross-section, but because the steel pipe (10) has high rigidity, there is a problem that the exposed steel pipe (12) cannot be easily removed even with special equipment. In addition, there is a problem that removing the exposed steel pipe (12) requires a significant amount of time and cost. Along with this, there is a problem that stability is reduced as a portion of the length of the steel pipe (10) is shortened as the exposed steel pipe (12) is cut.

[0007] To solve these problems, conventional steel pipe grouting methods were carried out by connecting a plastic pipe to a steel pipe and exposing the plastic pipe. However, the connection point between the steel pipe and the plastic pipe was frequently severed due to external impact, and the plastic pipe was frequently damaged when the steel pipe and the plastic pipe were inserted into the bore hole. In addition, as the steel pipe and the plastic had to be connected with screws, the inner wall of the steel pipe became thin, which resulted in a decrease in the structural rigidity and load-bearing capacity of the steel pipe. The problem to be solved

[0008] The present invention aims to solve the aforementioned problems, and more specifically, relates to a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting and a steel pipe grouting construction method using the reinforcing structure, wherein a steel pipe and a connecting plug are connected and inserted into a bore hole, and a plastic pipe is connected to the connecting plug after the steel pipe and the connecting plug are inserted into the bore hole, thereby preventing damage to the plastic pipe. means of solving the problem

[0009] A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to one embodiment comprises: a steel pipe that extends in the longitudinal direction and is inserted into a bore hole; a connecting plug to which the steel pipe is connected on one side; and a plastic pipe that extends in the longitudinal direction and is connected to the other side of the connecting plug; wherein the connecting plug comprises: a first connecting part connected to the steel pipe; a second connecting part connected to the plastic pipe; and a column part provided between the first connecting part and the second connecting part.

[0010] The plastic pipe of the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to one embodiment may be made of a PVC pipe.

[0011] In the column portion of the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to one embodiment, a wing portion protruding outwardly along the outer surface of the column portion is provided, and when the steel pipe is connected to the first connecting portion, the end of the steel pipe contacts one side of the wing portion, and when the plastic pipe is connected to the second connecting portion, the end of the plastic pipe contacts the other side of the wing portion.

[0012] In one embodiment, the outer surface of the second connecting portion of a reinforcing structure for improving straightness and construction efficiency of steel pipe grouting is provided with a second toothed portion having a plurality of second wedges, and the second wedge may include a second inclined portion formed by an incline that spreads outward along the direction from the second connecting portion toward the column portion, and a second stepped portion forming a stepped portion at the end of the second inclined portion.

[0013] A second tapered slope may be formed on the outer surface of the second connecting part so that the width of the second connecting part increases as it moves from the other end of the second connecting part toward the column part in a direction that improves the straightness and construction efficiency of steel pipe grouting according to one embodiment.

[0014] According to one embodiment, a plurality of second toothed portions are provided on the outer surface of the second connecting portion of a reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, and a second fastening spacing hole may be provided between one second toothed portion and another second toothed portion.

[0015] In one embodiment, the outer surface of the first connecting portion of a reinforcing structure for improving straightness and construction efficiency of steel pipe grouting is provided with a first toothed portion having a plurality of first wedges, and the first wedge may include a first inclined portion formed by an incline that spreads outward along the direction from the first connecting portion toward the column portion, and a first stepped portion that forms a stepped portion at the end of the first inclined portion.

[0016] In one embodiment, a first tapered slope may be formed on the outer surface of the first connecting part so that the width of the first connecting part increases as it moves from one end of the first connecting part toward the column part in a reinforcing structure for improving straightness and construction efficiency of steel pipe grouting.

[0017] In one embodiment, a plurality of first toothed portions are provided on the outer surface of the first connecting portion of a reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, and a first fastening spacing hole may be provided between one of the first toothed portions and another of the first toothed portions.

[0018] In one embodiment, the first fastening spacing hole and the second fastening spacing hole of the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting may not be arranged on the same straight line.

[0019] After the steel pipe is connected to the connecting plug of the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to one embodiment, the steel pipe and the connecting plug are inserted into the drilled hole, and after the steel pipe and the connecting plug are inserted into the drilled hole, the plastic pipe can be connected to the connecting plug.

[0020] A steel pipe grouting construction method using a reinforcing structure according to one embodiment comprises: a steel pipe extending in the longitudinal direction and inserted into a bore hole; a connecting plug connected to one side of the steel pipe; and a plastic pipe connected to the other side of the connecting plug and extending in the longitudinal direction; wherein the connecting plug comprises: a first connecting part connected to the steel pipe; a second connecting part connected to the plastic pipe; and a column part provided between the first connecting part and the second connecting part; and wherein the steel pipe grouting construction method using a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting comprises: a drilling step of forming a bore hole in the ground; a steel pipe connecting step of connecting the steel pipe to the connecting plug; an insertion step of inserting the steel pipe and the connecting plug into the bore hole; and a plastic pipe connecting step of inserting the plastic pipe into the bore hole and connecting the plastic pipe to the connecting plug after inserting the steel pipe and the connecting plug into the bore hole. It may include a grouting injection step of inserting an injection pipe into the plastic pipe, the connecting plug, and the steel pipe, and injecting grout through the injection pipe; and a plastic pipe removal step of removing the plastic pipe while excavating the ground after the grouting injection step.

[0021] The plastic pipe of the steel pipe grouting construction method using a reinforcing structure according to one embodiment may be made of a PVC pipe.

[0022] In the column portion of the steel pipe grouting construction method using a reinforcing structure according to one embodiment, a wing portion protruding outwardly along the outer surface of the column portion is provided, and when the steel pipe is connected to the first connecting portion, the end of the steel pipe contacts one side of the wing portion, and when the plastic pipe is connected to the second connecting portion, the end of the plastic pipe contacts the other side of the wing portion.

[0023] In the steel pipe grouting construction method using a reinforcing structure according to one embodiment, the outer surface of the second connecting part is provided with a second toothed part having a plurality of second wedges, and the second wedge may include a second inclined part formed by an incline that spreads outward along the direction toward the column part from the second connecting part, and a second stepped part that forms a stepped edge at the end of the second inclined part.

[0024] In a steel pipe grouting construction method using a reinforcing structure according to one embodiment, a second tapered slope may be formed on the outer surface of the second connecting part so that the width of the second connecting part widens as it moves from the other end of the second connecting part toward the column part.

[0025] In the steel pipe grouting construction method using a reinforcing structure according to one embodiment, a plurality of second toothed portions are provided on the outer surface of the second connecting portion, and a second fastening spacing hole may be provided between one second toothed portion and another second toothed portion.

[0026] In the steel pipe grouting construction method using a reinforcing structure according to one embodiment, the outer surface of the first connecting part is provided with a first toothed part having a plurality of first wedges, and the first wedge may include a first inclined part formed by an incline that spreads outward along the direction from the first connecting part toward the column part, and a first stepped part that forms a stepped edge at the end of the first inclined part.

[0027] In a steel pipe grouting construction method using a reinforcing structure according to one embodiment, a first tapered slope may be formed on the outer surface of the first connecting part so that the width of the first connecting part increases as it moves from one end of the first connecting part toward the column part.

[0028] In the steel pipe grouting construction method using a reinforcing structure according to one embodiment, a plurality of first toothed portions are provided on the outer surface of the first connecting portion, and a first fastening spacing hole may be provided between one of the first toothed portions and another of the first toothed portions.

[0029] In the steel pipe grouting construction method using a reinforcing structure according to one embodiment, the first fastening spacing hole and the second fastening spacing hole may not be arranged on the same straight line. Effects of the invention

[0030] The present invention has the advantage of preventing damage to the plastic pipe by first connecting the steel pipe and the connecting plug, inserting the steel pipe and the connecting plug into the drilled hole, and then connecting the plastic pipe to the connecting plug.

[0031] In addition, the present invention has the advantage of being able to structurally reinforce the point where the steel pipe and the plastic pipe are connected by connecting the steel pipe and the plastic pipe through a connecting plug.

[0032] In addition, the present invention has the advantage of being able to firmly connect a steel pipe and a plastic pipe to a connecting plug by providing a first toothed part and a second toothed part on the outer surface of the first connecting part and the second connecting part of a connecting plug in which a steel pipe and a plastic pipe are connected.

[0033] In addition, the present invention has the advantage of easily connecting a steel pipe and a plastic pipe to a connecting plug by forming a first taper slope and a second taper slope on the outer surface of the first connecting part and the second connecting part of a connecting plug that connects a steel pipe and a plastic pipe.

[0034] In addition, the present invention has the advantage of easily connecting a steel pipe and a plastic pipe to a connecting plug by forming a first fastening gap hole and a second fastening gap hole on the outer surface of the first connecting part and the second connecting part of a connecting plug to connect a steel pipe and a plastic pipe.

[0035] In addition, the present invention has the advantage of being able to block the straight-line outflow of the injection material by ensuring that the first fastening gap hole formed in the first connecting part of the connecting plug and the second fastening gap hole formed in the second connecting part of the connecting plug are not arranged on the same straight line.

[0036] In addition, the present invention has the advantage of preventing the wall thickness of the steel pipe and plastic pipe from becoming thin by fixing the steel pipe and plastic pipe to the connecting plug through the first toothed part and the second toothed part provided on the outer surface of the first connecting part and the second connecting part, rather than by screw fastening, thereby maintaining the rigidity of the steel pipe and plastic pipe. Brief explanation of the drawing

[0037] Figure 1 is a drawing showing a conventional steel pipe grouting construction method. FIG. 2 is a drawing showing a steel pipe grouting construction method according to an embodiment of the present invention. FIG. 3 is a drawing showing a steel pipe connected to the first connection part of a connecting plug according to an embodiment of the present invention. FIG. 4 is a drawing showing a plastic tube connected to the second connecting part of a connecting plug according to an embodiment of the present invention. FIG. 5 is a drawing showing a first toothed portion having a first tapered slope formed on the outer surface of a first connecting portion according to an embodiment of the present invention, and a second toothed portion having a second tapered slope formed on the outer surface of a second connecting portion. Figure 6 is a cross-sectional view of AA in Figure 7. FIG. 7 is a drawing showing that when a plastic tube is connected to the second connecting part of a connecting plug according to an embodiment of the present invention, the second fastening gap hole contracts. FIG. 8 is a drawing showing a steel pipe and a connecting plug according to an embodiment of the present invention inserted into a drilled hole and a plastic pipe connected to the connecting plug. FIG. 9 is a drawing showing an injection pipe inserted into the interior of a plastic pipe, a connecting plug, and a steel pipe according to an embodiment of the present invention. FIG. 10 is a drawing showing the removal of a plastic pipe along with excavation after injecting grout into a steel pipe and curing the grout according to an embodiment of the present invention. FIG. 11 is a flowchart of a steel pipe grouting construction method using a reinforcing structure according to an embodiment of the present invention. Specific details for implementing the invention

[0038] This specification clarifies the scope of the present invention and explains the principles of the present invention and discloses embodiments so that those skilled in the art can practice the present invention. The disclosed embodiments may be implemented in various forms.

[0039] Expressions such as "comprising" or "may comprise" that may be used in various embodiments of the present invention indicate the existence of the disclosed corresponding function, operation, or component, and do not limit one or more additional functions, operations, or components. Furthermore, in various embodiments of the present invention, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0040] When it is stated that a component is "connected or coupled" to another component, it should be understood that the component may be directly connected or coupled to the other component, but that a new component may also exist between the component and the other component. On the other hand, when it is stated that a component is "directly connected" or "directly coupled" to another component, it should be understood that no new component exists between the component and the other component.

[0041] The terms "first," "second," etc., as used in this specification may be used to describe various components, but the components should not be limited by these terms. The terms are used solely for the purpose of distinguishing one component from another.

[0042] The present invention relates to a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting and a method for steel pipe grouting using the reinforcing structure. Specifically, the invention relates to a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting and a method for steel pipe grouting using the reinforcing structure, wherein a steel pipe is connected to a connecting plug and inserted into a bore hole, and a plastic pipe is connected to the connecting plug after the steel pipe and the connecting plug are inserted into the bore hole, thereby preventing damage to the plastic pipe.

[0043] Referring to FIG. 2, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure are to stop the excavation work before reaching the planned excavation cross-section (131), form a drilled hole (140) in the face (130), and install a steel pipe (110), a connecting plug (200), and a plastic pipe (120) inside the drilled hole (140).

[0044] Afterward, grouting (132) is injected through the steel pipe (110), the connecting plug (200), and the plastic pipe (120), and additional excavation is performed using excavation equipment up to the planned excavation cross-section (131). When excavating up to the planned excavation cross-section (131), the plastic pipe (120) can be removed.

[0045] The reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure allow the steel pipe (110) and the plastic pipe (120) to be easily connected through the connecting plug (200). By connecting the plastic pipe (120) to the connecting plug (200) after the steel pipe (110) and the connecting plug (200) are inserted into the drilled hole (140), damage to the plastic pipe (120) can be prevented. Hereinafter, a preferred embodiment of the present invention will be described in detail.

[0046] A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention includes the steel pipe (110), the connecting plug (200), and the plastic pipe (120).

[0047] The above steel pipe (110) extends in the longitudinal direction and is inserted into the above-mentioned hole (140). The above-mentioned steel pipe (110) is formed in a tubular shape and extends in the longitudinal direction, and the above-mentioned steel pipe (110) may be made of steel.

[0048] The above connecting plug (200) is connected to the steel pipe (110) on one side. The plastic pipe (120) is connected to the other side of the connecting plug (200) and extends in the longitudinal direction. The plastic pipe (120) is formed in a tubular shape and extends in the longitudinal direction, and the plastic pipe (120) may be made of a plastic material. According to one embodiment of the present invention, the plastic pipe (120) may be made of a PVC pipe.

[0049] Referring to FIGS. 3 and 4, the steel pipe (110) and the plastic pipe (120) can be connected through the connecting plug (200). Specifically, the steel pipe (110) can be connected to one side of the connecting plug (200), and the plastic pipe (120) can be connected to the other side of the connecting plug (200).

[0050] The connecting plug (200) according to an embodiment of the present invention includes a first connecting part (220) connected to the steel pipe (110), a second connecting part (250) connected to the plastic pipe (120), and a column part (210) provided between the first connecting part (220) and the second connecting part (250).

[0051] The above connecting plug (200) may be formed in the shape of a hollow tube, and the connecting plug (200) may be extended in the longitudinal direction. When the steel pipe (110) and the plastic pipe (120) are connected to the connecting plug (200), the plastic pipe (120) - the connecting plug (200) - the steel pipe (110) can be connected to each other.

[0052] The first connecting part (220) may be provided on one side of the connecting plug (200), which is formed in the shape of a hollow tube, and the second connecting part (250) may be provided on the other side of the connecting plug (200).

[0053] The first connecting part (220) may have a diameter smaller than the inner diameter of the steel pipe (110), and the steel pipe (110) may be connected to the connecting plug (200) as the first connecting part (220) is inserted into the steel pipe (110). The second connecting part (250) may have a diameter smaller than the inner diameter of the plastic pipe (120), and the plastic pipe (120) may be connected to the connecting plug (200) as the second connecting part (250) is inserted into the plastic pipe (120).

[0054] The above column portion (210) may be a portion provided between the first connecting portion (220) and the second connecting portion (250). The first connecting portion (220) and the second connecting portion (250) may be connected through the column portion (210).

[0055] According to an embodiment of the present invention, the connecting plug (200) can be manufactured by integrally forming the column portion (210), the first connecting portion (220), and the second connecting portion (250). Additionally, according to another embodiment of the present invention, the connecting plug (200) can be manufactured by combining the first connecting portion (220) and the second connecting portion (250) with the column portion (210).

[0056] The above column portion (210) may be provided with a wing portion (211) that protrudes outward from the column portion (210) along the outer surface of the column portion (210). The wing portion (211) is formed in a ring shape along the outer surface of the column portion (210), and the ends of the steel pipe (110) and the plastic pipe (120) may come into contact on both sides of the wing portion (211).

[0057] Specifically, when the steel pipe (110) is connected to the first connecting part (220), the end of the steel pipe (110) can come into contact with one side of the wing part (211). Additionally, when the plastic pipe (120) is connected to the second connecting part (250), the end of the plastic pipe (120) can come into contact with the other side of the wing part (211).

[0058] Here, one side may be the direction from the column portion (210) toward the first connecting portion (220), and the other side may be the direction from the column portion (210) toward the second connecting portion (250).

[0059] By providing the ring-shaped wing portion (211) that contacts the end of the steel pipe (110) and the end of the plastic pipe (120) on the outer surface of the column portion (210), it is possible to prevent the injection material (grouting) from leaking to the outside of the connecting plug (200) when the injection material (grouting) is injected through the plastic pipe (120) - the connecting plug (200) - the steel pipe (110).

[0060] Referring to FIG. 5, a second toothed portion (260) having a plurality of second wedges (261) may be provided on the outer surface of the second connecting portion (250) according to an embodiment of the present invention. The second toothed portion (260) extends along the outer surface of the second connecting portion (250), and the second toothed portion (260) may be composed of a plurality of the second wedges (261).

[0061] The second wedge (261) comprises a second inclined portion (262) that is inclined outwardly along the direction toward the column portion (210) from the second connecting portion (250), and a second stepped portion (263) that forms a stepped portion at the end of the second inclined portion (262).

[0062] By providing the second toothed portion (260) including a plurality of the second wedges (261) on the outer surface of the second connecting portion (250), the plastic tube (120) can be easily connected to the second connecting portion (250) and the plastic tube (120) can be firmly fixed to the second connecting portion (250).

[0063] Specifically, when the second connecting part (250) is inserted into the plastic tube (120), the second connecting part (250) can be easily inserted into the plastic tube (120) along the second inclined part (262), which is formed by an outward slope that spreads outward along the direction from the second connecting part (250) toward the column part (210).

[0064] Afterward, when the second connecting part (250) is inserted into the plastic tube (120), the plastic tube (120) can be firmly fixed to the second connecting part (250) by means of a plurality of second wedges (261) provided on the outer surface of the second connecting part (250).

[0065] Referring to FIGS. 5 and 6, a second tapered slope (251) may be formed on the outer surface of the second connecting part (250) so that the width of the second connecting part (250) increases as it moves from the other end of the second connecting part (250) toward the column part (210).

[0066] The second connecting part (250) may have a width that increases as it moves from the other end of the second connecting part (250) toward the column part (210), and as the width of the second connecting part (250) increases as it moves from the other end of the second connecting part (250) toward the column part (210), the second tapered slope (251) may be formed on the outer surface of the second connecting part (250).

[0067] By forming the second tapered slope (251) on the outer surface of the second connecting part (250), the plastic tube (120) can be easily connected to the second connecting part (250). Specifically, as the width of the second connecting part (250) at the other end of the second connecting part (250) is smaller than the width of the second connecting part (250) near the column part (210), the second connecting part (250) can be easily inserted into the plastic tube (120). At this time, the width of the second connecting part (250) at the other end of the second connecting part (250) may be smaller than the width inside the plastic tube (120).

[0068] Afterward, when the second connecting part (250) is inserted into the plastic tube (120), the second connecting part (250) can be firmly fixed to the plastic tube (120) by a plurality of second wedges (261) provided on the outer surface of the second connecting part (250).

[0069] Referring to FIGS. 5 and 7, a plurality of the second gears (260) may be provided on the outer surface of the second connecting part (250), and a second fastening gap hole (270) may be provided between one of the second gears (260) and another of the second gears (260).

[0070] One of the second gear portions (260) and another of the second gear portions (260) may be spaced apart from each other, and the second fastening spaced hole (270) may be a hole formed between two of the second gear portions (260) that are spaced apart from each other. The second fastening spaced hole (270) may be extended in the longitudinal direction. Specifically, the second fastening spaced hole (270) may be extended in a direction parallel to the direction from the second connecting portion (250) toward the column portion (210).

[0071] By providing the second fastening gap hole (270) between one of the second gear portions (260) and the other of the second gear portions (260), the plastic tube (120) can be easily connected to the second connecting portion (250). Referring to FIG. 7, when the second connecting portion (250) is inserted into the plastic tube (120), the second fastening gap hole (270) can be contracted.

[0072] Specifically, when the second connecting part (250) is inserted into the plastic tube (120), a plurality of the second gear parts (260) can be pressed by the plastic tube (120). When a plurality of the second gear parts (260) are pressed by the plastic tube (120), a second fastening spacing hole (270) is formed between two second gear parts (260) that are spaced apart from each other, thereby securing a space in which the second gear parts (260) can be deformed. Through this, the plastic tube (120) can be easily connected to the second connecting part (250).

[0073] After the second connecting part (250) is inserted into the plastic tube (120), an elastic restoring force may be generated in the deformed second toothed part (260). The plastic tube (120) can be firmly fixed to the second connecting part (250) by the elastic restoring force of the second toothed part (260) and the plurality of second wedges (261) provided on the second toothed part (260).

[0074] According to an embodiment of the present invention, the first connecting part (220) can be screw-coupled to the steel pipe (110). However, in order to screw-couple the first connecting part (220) and the steel pipe (110), screw threads must be formed on the steel pipe (110). When screw threads are formed on the steel pipe (110) in this way, the rigidity of the steel pipe (110) may decrease as the inner wall thickness of the steel pipe (110) becomes thinner.

[0075] To this end, a first toothed portion (230) may be provided on the outer surface of the first connecting portion (220) according to an embodiment of the present invention. Referring to FIG. 5, the first toothed portion (230) may be provided on the outer surface of the first connecting portion (220) according to an embodiment of the present invention, wherein a plurality of first wedges (231) are provided. The first toothed portion (230) extends along the outer surface of the first connecting portion (220), and the first toothed portion (230) may be composed of a plurality of first wedges (231).

[0076] The first wedge (231) comprises a first inclined portion (232) that is inclined outwardly along the direction toward the column portion (210) from the first connecting portion (220), and a first stepped portion (233) that forms a stepped portion at the end of the first inclined portion (232).

[0077] By providing the first toothed portion (230) including a plurality of first wedges (231) on the outer surface of the first connecting portion (220), the steel pipe (110) can be easily connected to the first connecting portion (220) and the steel pipe (110) can be firmly fixed to the first connecting portion (220).

[0078] Specifically, when the first connecting part (220) is inserted into the steel pipe (110), the first connecting part (220) can be easily inserted into the steel pipe (110) along the first inclined part (232), which is formed as an outward slope along the direction from the first connecting part (220) toward the column part (210).

[0079] Afterward, when the first connecting part (220) is inserted into the steel pipe (110), the steel pipe (110) can be firmly fixed to the first connecting part (220) by means of a plurality of first wedges (231) provided on the outer surface of the first connecting part (220).

[0080] Referring to FIGS. 5 and 6, a first tapered slope (221) may be formed on the outer surface of the first connecting part (220) so that the width of the first connecting part (220) increases as it moves from one end of the first connecting part (220) toward the column part (210).

[0081] The first connecting part (220) may have a width that increases as it moves from one end of the first connecting part (220) toward the column part (210), and as the width of the first connecting part (220) increases as it moves from one end of the first connecting part (220) toward the column part (210), the first tapered slope (221) may be formed on the outer surface of the first connecting part (220).

[0082] By forming the first tapered slope (221) on the outer surface of the first connecting part (220), the steel pipe (110) can be easily connected to the first connecting part (220). Specifically, at one end of the first connecting part (220), the width of the first connecting part (220) is smaller than the width of the first connecting part (220) near the column part (210), so that the first connecting part (220) can be easily inserted into the steel pipe (110). At this time, at the other end of the first connecting part (220), the width of the first connecting part (220) may be smaller than the width inside the steel pipe (110).

[0083] Afterward, when the first connecting part (220) is inserted into the steel pipe (110), the first connecting part (220) can be firmly fixed to the steel pipe (110) by a plurality of first wedges (231) provided on the outer surface of the first connecting part (220).

[0084] Referring to FIGS. 5 and 7, a plurality of first toothed portions (230) may be provided on the outer surface of the first connecting portion (220), and a first fastening spacing hole (240) may be provided between one first toothed portion (230) and another first toothed portion (230).

[0085] One of the first gear portions (230) and another of the first gear portions (230) may be spaced apart from each other, and the first fastening spaced hole (240) may be a hole formed between two of the first gear portions (230) that are spaced apart from each other. The first fastening spaced hole (240) may be extended in the longitudinal direction. Specifically, the first fastening spaced hole (240) may be extended in a direction parallel to the direction from the first connecting portion (220) toward the column portion (210).

[0086] By providing the first fastening gap hole (240) between one of the first gear portions (230) and another of the first gear portions (230), the steel pipe (110) can be easily connected to the first connecting portion (220). Referring to FIG. 7, when the first connecting portion (220) is inserted into the steel pipe (110), the first fastening gap hole (240) can be contracted.

[0087] Specifically, when the first connecting part (220) is inserted into the steel pipe (110), a plurality of the first gear parts (230) can be pressed by the steel pipe (110). When a plurality of the first gear parts (230) are pressed by the steel pipe (110), a first fastening spacing hole (240) is formed between two first gear parts (230) that are spaced apart from each other, thereby securing a space in which the first gear parts (230) can be deformed. Through this, the steel pipe (110) can be easily connected to the first connecting part (220).

[0088] After the first connecting part (220) is inserted into the steel pipe (110), an elastic restoring force may be generated in the deformed first toothed part (230). The steel pipe (110) can be firmly fixed to the first connecting part (220) by the elastic restoring force of the first toothed part (230) and the plurality of first wedges (231) provided in the first toothed part (230).

[0089] Referring to FIGS. 5 and 7, the first fastening gap hole (240) and the second fastening gap hole (270) according to an embodiment of the present invention may not be placed on the same straight line. Specifically, the second fastening gap hole (270) may not be placed on an extension line extending from the first fastening gap hole (240), and the first fastening gap hole (240) may not be placed on an extension line extending from the second fastening gap hole (270).

[0090] That is, the first fastening gap hole (240) and the second fastening gap hole (270) may be provided in a zigzag pattern as shown in FIGS. 5 and FIGS. 7. In this way, by preventing the first fastening gap hole (240) formed in the first connecting part (220) and the second fastening gap hole (270) formed in the second connecting part (250) from being placed on the same straight line, the straight outflow of the injection material can be blocked.

[0091] Specifically, after the plastic pipe (120), the connecting plug (200), and the steel pipe (110) are connected, an injection material (grouting) can be injected through the injection pipe (150). At this time, if the first fastening gap hole (240) formed in the first connecting part (220) and the second fastening gap hole (270) formed in the second connecting part (250) are arranged on the same straight line, there is a risk that the injection material will leak out along the first fastening gap hole (240) and the second fastening gap hole (270).

[0092] To prevent this, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention may prevent the first fastening spacing hole (240) formed in the first connecting part (220) and the second fastening spacing hole (270) formed in the second connecting part (250) from being arranged on the same straight line.

[0093] A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention connects the steel pipe (110) to the connecting plug (200) to prevent damage to the plastic pipe (120) and inserts it into the drilled hole (140), and then connects the plastic pipe (120) to the connecting plug (200).

[0094] Since the plastic tube (120) has relatively weaker rigidity compared to the steel tube (110), if the plastic tube (120) and the steel tube (110) are connected and then inserted into the drilled hole (140), damage may occur to the plastic tube (120).

[0095] Specifically, when the plastic tube (120) and the steel tube (110) are inserted into the drilled hole (140) at the same time as drilling the drilled hole (140), the plastic tube (120) may be damaged by the impact generated during drilling. Additionally, if the depth of the drilled hole (140) is deep, the drilled hole (140) may not maintain a straight line and may sag. In this case, since the straight plastic tube (120) and the steel tube (110) must be pushed into the drilled hole (140), damage may occur to the plastic tube (120) due to bending stress.

[0096] To prevent this, a reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention can be formed by connecting the steel pipe (110) to the connecting plug (200) as shown in FIG. 8, inserting the steel pipe (110) and the connecting plug (200) into the drilling hole (140), and then connecting the plastic pipe (120) to the connecting plug (200) after the steel pipe (110) and the connecting plug (200) are inserted into the drilling hole (140).

[0097] In this way, by first inserting the steel pipe (110) and the connecting plug (200) into the drilled hole (140) and connecting the plastic pipe (120) to the connecting plug (200), damage to the plastic pipe (120) can be prevented.

[0098] Referring to FIG. 8, it may be difficult to connect the plastic pipe (120) to the connecting plug (200) while the steel pipe (110) and the connecting plug (200) are first inserted into the perforated hole (140).

[0099] Specifically, it may be difficult to connect the plastic tube (120) to the connecting plug (200) inside the drilled hole (140), which is difficult to observe with the naked eye. Additionally, if the depth of the drilled hole (140) is deep, the drilled hole (140) may not maintain a straight line and may sag; in this case, the steel tube (110) and the connecting plug (200) may not be positioned in the center of the drilled hole (140) as shown in FIG. 8. Since the steel tube (110) and the connecting plug (200) are not positioned in the center of the drilled hole (140), it may be difficult to connect the plastic tube (120) to the connecting plug (200).

[0100] However, as described above, the second tapered slope (251) may be formed on the outer surface of the second connecting part (250) of the connecting plug (200) according to the embodiment of the present invention. By forming the second tapered slope (251) on the outer surface of the second connecting part (250), the plastic tube (120) can be easily connected to the second connecting part (250).

[0101] Specifically, at the other end of the second connecting part (250), the width of the second connecting part (250) is smaller than the width of the second connecting part (250) near the column part (210), so that the second connecting part (250) can be easily inserted into the plastic tube (120). Even if the steel tube (110) and the connecting plug (200) are not positioned in the center of the drilled hole (140), the plastic tube (120) can be easily connected to the second connecting part (250) as the second connecting part (250) is easily inserted into the plastic tube (120) along the second taper slope (251) of the second connecting part (250).

[0102] After the second connecting part (250) is inserted into the plastic tube (120), the plastic tube (120) can be firmly fixed to the second connecting part (250) by the second toothed part (260) provided on the outer surface of the second connecting part (250).

[0103] Referring to FIG. 9, after the plastic pipe (120) - the connecting plug (200) - the steel pipe (110) are connected, an injection pipe (150) can be inserted into the plastic pipe (120), the connecting plug (200), and the steel pipe (110), and grouting can be injected through the injection pipe (150).

[0104] Afterward, once the grouting has cured, the plastic pipe (120) is removed while proceeding with excavation up to the planned excavation cross-section (131) as shown in FIG. 10. Since the plastic pipe (120) has relatively weaker rigidity compared to the steel pipe (110), the plastic pipe (120) can be easily removed when proceeding with additional excavation up to the planned excavation cross-section (131).

[0105] The steel pipe grouting construction method using a reinforcing structure according to an embodiment of the present invention is a steel pipe grouting construction method using a reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting according to the above-described embodiment of the present invention. The features of the reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting according to the above-described embodiment of the present invention can all be applied to the steel pipe grouting construction method using a reinforcing structure according to the embodiment of the present invention to be described later. As the reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting according to the embodiment of the present invention has been described above, a detailed description is omitted.

[0106] Referring to FIG. 11, a steel pipe grouting construction method using a reinforcing structure according to an embodiment of the present invention includes a drilling step (S110), a steel pipe connection step (S120), an insertion step (S130), a plastic pipe connection step (S140), a grouting injection step (S150), and a plastic removal step (S160).

[0107] The drilling step (S110) is a step of forming the drilled hole (140) in the ground. The steel pipe connection step (S120) is a step of connecting the steel pipe (110) to the connection plug (200) as shown in FIG. 3. The insertion step (S130) is a step of inserting the steel pipe (110) and the connection plug (200) into the drilled hole (140). Specifically, the insertion step (S130) is a step of first inserting the steel pipe (110) and the connection plug (200) into the drilled hole (140) as shown in FIG. 4.

[0108] According to an embodiment of the present invention, the drilling step (S110) and the steel pipe connection step (S120) may proceed regardless of the order. For example, the drilling step (S110) may proceed before the steel pipe connection step (S120), or the steel pipe connection step (S120) may proceed before the drilling step (S110). Additionally, the drilling step (S110) and the steel pipe connection step (S120) may proceed simultaneously.

[0109] In addition, the drilling step (S110) and the insertion step (S130) may be performed separately, or the drilling step (S110) and the insertion step (S130) may be performed simultaneously. Specifically, the drilling hole (140) may be formed first in the drilling step (S110), and the steel pipe (110) connected to the connecting plug (200) may be inserted into the drilling hole (140). Furthermore, drilling may be performed while inserting the steel pipe (110) connected to the connecting plug (200) into the ground.

[0110] The above plastic pipe connection step (S140) is a step of inserting the steel pipe (110) and the connecting plug (200) into the drilled hole (140), and then inserting the plastic pipe (120) into the drilled hole (140) to connect the plastic pipe (120) to the connecting plug (200).

[0111] Referring to FIG. 4, in order to prevent damage to the plastic pipe (120), the steel pipe (110) and the connecting plug (200) can be first inserted into the perforated hole (140), and the plastic pipe (120) can be connected to the connecting plug (200). In this way, by first inserting the steel pipe (110) and the connecting plug (200) into the perforated hole (140) and connecting the plastic pipe (120) to the connecting plug (200), damage to the plastic pipe (120) can be prevented.

[0112] Referring to FIG. 8, it may be difficult to connect the plastic pipe (120) to the connecting plug (200) while the steel pipe (110) and the connecting plug (200) are first inserted into the drilled hole (140).

[0113] Specifically, it may be difficult to connect the plastic tube (120) to the connecting plug (200) inside the drilled hole (140), which is difficult to observe with the naked eye. Additionally, if the depth of the drilled hole (140) is deep, the drilled hole (140) may not maintain a straight line and may sag; in this case, the steel tube (110) and the connecting plug (200) may not be positioned in the center of the drilled hole (140) as shown in FIG. 8. Since the steel tube (110) and the connecting plug (200) are not positioned in the center of the drilled hole (140), it may be difficult to connect the plastic tube (120) to the connecting plug (200).

[0114] However, as described above, the second tapered slope (251) may be formed on the outer surface of the second connecting part (250) of the connecting plug (200) according to the embodiment of the present invention. By forming the second tapered slope (251) on the outer surface of the second connecting part (250), the plastic tube (120) can be easily connected to the second connecting part (250).

[0115] Specifically, at the other end of the second connecting part (250), the width of the second connecting part (250) is smaller than the width of the second connecting part (250) near the column part (210), so that the second connecting part (250) can be easily inserted into the plastic tube (120). Even if the steel tube (110) and the connecting plug (200) are not positioned in the center of the drilled hole (140), the plastic tube (120) can be easily connected to the second connecting part (250) as the second connecting part (250) is easily inserted into the plastic tube (120) along the second taper slope (251) of the second connecting part (250).

[0116] After the second connecting part (250) is inserted into the plastic tube (120), the plastic tube (120) can be firmly fixed to the second connecting part (250) by the second toothed part (260) provided on the outer surface of the second connecting part (250).

[0117] Referring to FIG. 9, the grouting injection step (S150) is a step of inserting the injection pipe (150) into the plastic pipe (120), the connecting plug (200), and the steel pipe (110), and injecting grout through the injection pipe (150). Referring to FIG. 11, before injecting grout through the injection pipe (150), caulking of the plastic pipe (120), the connecting plug (200), and the steel pipe (110) may be performed first to prevent leakage of grout. After the caulking of the plastic pipe (120), the connecting plug (200), and the steel pipe (110) is performed, grout can be injected through the injection pipe (150).

[0118] The above plastic pipe removal step (S160) is a step of removing the plastic pipe (120) while excavating the ground after the above grouting injection step (S150). Once the grouting is cured, the plastic pipe (120) is removed while proceeding with excavation up to the planned excavation cross-section (131) as shown in FIG. 10. Since the plastic pipe (120) has relatively weaker rigidity compared to the steel pipe (110), the plastic pipe (120) can be easily removed when proceeding with additional excavation up to the planned excavation cross-section (131).

[0119] The steel pipe grouting construction method using a reinforcing structure according to an embodiment of the present invention may further include a step of installing support materials and pouring shotcrete (S170). After the plastic pipe removal step (S160), in the step of installing support materials and pouring shotcrete (S170), support materials can be installed on the planned excavation cross-section (131) and shotcrete can be poured to reinforce the ground.

[0120] The reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to the above-described embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the following effects.

[0121] The reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the advantage of preventing damage to the plastic pipe by first connecting the steel pipe and the connecting plug, inserting the steel pipe and the connecting plug into the drilled hole, and then connecting the plastic pipe to the connecting plug.

[0122] In addition, the reinforcing structure for improving the straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the advantage of being able to structurally reinforce the point where the steel pipe and the plastic pipe are connected by connecting the steel pipe and the plastic pipe through a connecting plug.

[0123] In addition, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the advantage of being able to firmly fix the steel pipe and the plastic pipe to the connecting plug by providing a first toothed part and a second toothed part on the outer surface of the first connecting part and the second connecting part of the connecting plug connecting the steel pipe and the plastic pipe.

[0124] In addition, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the advantage of easily connecting the steel pipe and the plastic pipe to the connecting plug by forming a first taper slope and a second taper slope on the outer surface of the first connecting part and the second connecting part of the connecting plug connecting the steel pipe and the plastic pipe.

[0125] In addition, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the advantage of easily connecting the steel pipe and the plastic pipe to the connecting plug by forming a first fastening gap hole and a second fastening gap hole on the outer surface of the first connecting part and the second connecting part of the connecting plug to connect the steel pipe and the plastic pipe.

[0126] In addition, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure have the advantage of being able to block straight-line outflow of the injection material by ensuring that the first fastening spacing hole formed in the first connection part of the connecting plug and the second fastening spacing hole formed in the second connection part of the connecting plug are not arranged on the same straight line.

[0127] In addition, the reinforcing structure for improving straightness and construction efficiency of steel pipe grouting according to an embodiment of the present invention and the steel pipe grouting construction method using the reinforcing structure can prevent the steel pipe and plastic pipe from becoming thin by connecting the steel pipe and plastic pipe to the connecting plug through the first toothed part and the second toothed part provided on the outer surface of the first connecting part and the second connecting part, rather than by screw fastening, and thereby has the advantage of maintaining the rigidity of the steel pipe and plastic pipe.

[0128] As such, the present invention has been described with reference to an embodiment illustrated in the drawings; however, this is merely illustrative, and those skilled in the art will understand that various modifications and variations of the embodiment are possible therefrom. Accordingly, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0129] 110...Steel pipe 120...Plastic pipe 130...Final scene 131...Scheduled excavation cross-section 132...Grouting 140...Punching hole 150...Injection pipe 200...Connecting plug 210...Pillar section 211...Wing section 220...1st connection 221...1st taper slope 230...1st tooth section 231...1st wedge 232...1st slope section 233...1st step section 240...1st fastening separation hole 250...2nd connecting part 251...2nd taper slope 260...2nd tooth section 261...2nd wedge 262...2nd slope 263...2nd step section 270...2nd fastening separation hole S110... Drilling stage S120... Steel pipe connection stage S130...Insert step S140...Plastic tube connection step S150...Grouting injection step S160...Plastic pipe removal step S170... Installation of support materials and shotcrete pouring stage

Claims

Claim 1 A steel pipe extending in the longitudinal direction and inserted into a perforated hole; a connecting plug connected to one side of the steel pipe; A plastic tube extending in the longitudinal direction and connected to the other side of the above-mentioned connecting plug; wherein the connecting plug comprises: a first connecting part connected to the steel pipe; a second connecting part connected to the plastic tube; and a column part provided between the first connecting part and the second connecting part; wherein a second toothed part is provided on the outer surface of the second connecting part, wherein a plurality of second wedges are provided, and the second wedges include a second inclined part formed by an outward slope that widens along the direction from the second connecting part toward the column part, and a second stepped part forming a step at the end of the second inclined part; wherein a second tapered slope is formed on the outer surface of the second connecting part such that the width of the second connecting part widens as it goes from the other end of the second connecting part toward the column part; wherein a plurality of the second toothed part is provided on the outer surface of the second connecting part, and a second fastening spacing hole is provided between one of the second toothed part and another of the second toothed part; and wherein after the steel pipe is connected to the connecting plug, the A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized by inserting a steel pipe and a connecting plug into a bore hole, and connecting a plastic pipe to the connecting plug after the steel pipe and the connecting plug are inserted into the bore hole. Claim 2 A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized in that, in claim 1, the plastic pipe is made of a PVC pipe. Claim 3 A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized in that, in claim 1, the column portion is provided with a wing portion protruding outwardly along the outer surface of the column portion, and when the steel pipe is connected to the first connecting portion, the end of the steel pipe contacts one side of the wing portion, and when the plastic pipe is connected to the second connecting portion, the end of the plastic pipe contacts the other side of the wing portion. Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized in that, in claim 1, a first toothed portion having a plurality of first wedges is provided on the outer surface of the first connecting portion, and the first wedge comprises a first inclined portion formed by an incline that spreads outward along the direction from the first connecting portion toward the column portion, and a first stepped portion forming a stepped portion at the end of the first inclined portion. Claim 8 A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized in that, in claim 7, a first tapered slope is formed on the outer surface of the first connecting part so that the width of the first connecting part increases as it moves from one end of the first connecting part toward the column part. Claim 9 A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized in that, in claim 7, a plurality of first toothed portions are provided on the outer surface of the first connecting portion, and a first fastening spacing hole is provided between one of the first toothed portions and another of the first toothed portions. Claim 10 A reinforcing structure for improving straightness and construction efficiency of steel pipe grouting, characterized in that, in claim 9, the first fastening spacing hole and the second fastening spacing hole are not arranged on the same straight line. Claim 11 delete Claim 12 A method for constructing a steel pipe grouting using a reinforcing structure for improving the straightness and construction efficiency of the steel pipe grouting according to claim 1, comprising: a drilling step of forming a drill hole in the ground; a steel pipe connection step of connecting the steel pipe to the connecting plug; an insertion step of inserting the steel pipe and the connecting plug into the drill hole; a plastic pipe connection step of inserting the plastic pipe into the drill hole and connecting the plastic pipe to the connecting plug after inserting the steel pipe and the connecting plug into the drill hole; a grouting injection step of inserting an injection pipe into the plastic pipe, the connecting plug, and the steel pipe, and injecting grouting through the injection pipe; and a plastic pipe removal step of removing the plastic pipe while excavating the ground after the grouting injection step.

Images