KR102579407B1 - Waterproof structure of Drug Inlet for tunnel segment - Google Patents

Abstract

The present invention relates to a waterproof structure of a drug injection port formed in a tunnel segment. By improving the drug injection port provided in the segment forming the tunnel, the fastening pipe provided with a check valve and an O-ring are provided instead of a waterproof structure by a sealing member. It was developed to make it easier to carry out the series of processes of injecting chemicals or backfilling materials and finally installing the finishing cap by using an intermediate screw tube;
When forming a segment to form a tunnel, a main body is embedded so as to penetrate the segment and a female thread is formed along the inner circumferential surface, an end cap is made of a cylindrical shape with one side closed and is coupled to the outer part of the tunnel of the main body, and a thread is formed on the outer circumferential surface of the main body to form a tunnel of the main body. In the waterproof structure of the drug injection port formed in the tunnel segment including a closing cap coupled to the inner portion;
The main body has an end cap coupling portion on an outer diameter side coupled to the end cap, and an end cap having a protruding extension portion whose inner diameter and outer diameter are taperedly reduced and extended;
It rotates by a first male thread portion corresponding to the female thread portion of the main body on the outer peripheral surface, an insertion coupling portion whose inner diameter is taperedly reduced and inserted into the protruding extension portion, and a torsion spring mounted on the insertion coupling portion at one end. A fastening inner pipe consisting of a disk-shaped check valve plate on which pressure acts in the direction of blocking the insertion coupling portion, and a plurality of first tool engaging protrusions radially protruding at regular intervals from the other inner diameter of the insertion coupling portion;
At one end, the outer peripheral surface is shortened to a step and extended long, and is inserted into the inside of the insertion coupling part. An insertion step is installed and fixed with an O-ring on the outer diameter surface of the end, and is formed in a stepped portion on the opposite side of the insertion step to form a female thread part of the main body. A tunnel segment characterized by comprising a second male screw portion coupled correspondingly, and an intermediate screw member having a plurality of second tool engaging protrusions that are recessed on the surface facing the inside of the tunnel and protrude radially at regular intervals on the inner diameter. It relates to the waterproof structure of the chemical injection port formed in.

Description

Waterproof structure of Drug Inlet for tunnel segment}

The present invention relates to a waterproof structure of a drug inlet formed in a tunnel segment. To be described in more detail, the drug inlet provided in a segment forming a tunnel is improved, so that the fastening pipe is provided with a check valve rather than a waterproof structure by a sealing member. Waterproofing of the drug injection port formed in the tunnel segment was developed to make it easier to perform the series of processes of injecting the drug or backfill and finally installing the finishing cap by using an intermediate threaded pipe equipped with an O-ring. It's about structure.

In general, the purpose of constructing a tunnel was to use it when there is an obstacle such as a mountain that is difficult to bypass in the path of a railroad or road, but today, the types of obstacles are various, and roads or railroads are made to pass in a straight line without detouring, thereby reducing the mileage and travel distance. Construction is also being carried out in cases where the time can be significantly reduced.

In the past, tunnel construction involved drawing up a construction plan, excavating the tunnel using breakers, blasting, etc., then reinforcing the ground, pouring concrete on the ceiling and inner walls of the tunnel, and curing it. In the process, the concrete was cured until it hardened. A form, a temporary structure, is used in between, and when curing is completed, it is separated and the work is generally carried out continuously by moving forward in a section usually about 8 to 10 m long.

However, the shield method of creating an underground tunnel using an excavator underground without any ground excavation work is mainly a large-diameter tunnel. When constructing an underground tunnel such as a subway or power tunnel, a shield machine (shield machine) is used in the underground vertical shaft at the starting point. A machine pierces the stratum to form a tunnel, and a tunnel forming structure called a segment is used in the tunnel formed by excavation.

In this way, the shield tunnel segments used during shield tunnel construction are structurally large in size and heavy, so they are produced in pieces and assembled on site. These segments are blocks made up of arc-shaped pieces, which are initially cylindrical at the site. After being assembled, the cylindrical segments are assembled together in the longitudinal direction to form a tunnel.

At this time, a tail void, which is an empty space created by over cutting during excavation, remains outside the segment tunnel formed, and this shallow area must be filled with backfill material to prevent subsidence of the ground or imbalance in earth pressure. It must be filled with , and it is usually injected through the drug injection port, also known as backfilling port, made in the segment.

In addition, in the case of the propulsion pipe method (SEMI-Shield) used to bury small pipes, a steel cylindrical excavator called a semi-shield machine is introduced, and then the cutter head for soil excavation mounted on the tip of the machine is used. When excavating the ground while rotating and pushing the pipe (mainly using a Hume pipe) into the excavated space, various lubricants are injected to the outside of the pipe through the chemical injection port to reduce the frictional resistance between the outside of the pipe and the ground, so that the Hume pipe maintains the excavation surface. It ensures smooth passage, and after the excavation and propulsion pipe installation work is completed, backfilling material made of cement mortar, plasticized grout material, etc. is filled through the above-mentioned chemical injection port to fill the voids outside the pipe body.

If the inlet is not blocked once the filling of the backfill material is completed, there is a risk of soil and sand on the outside of the tunnel being lost not only due to initial leakage of the backfill material but also due to future water leakage. This is a waterproof structure rather than a simple bolting method. It is desirable to have a structure that prevents the exposed surface from protruding from the inner wall of the tunnel.

Accordingly, various prior patents have proposed ways to solve this problem, but in the case of a method of combining a stopper with an O-ring at the inlet, that is, a closing cap, an empty space is formed inside the body, which is filled with leaked water, and this space is closed. Additional means are needed, and a method of placing a sealing member between the first and second pressure fasteners coupled to the body has also been proposed, but the joining process is cumbersome, and in particular, the sealing member is inserted and pressed and is not attached to the inner wall of the body. There was the inconvenience of having to peel off the plastic packaging every time it was made of a material that adheres tightly and hardens.

Republic of Korea Patent Registration No. 10-0894885-0000 (April 17, 2009) Republic of Korea Patent Registration No. 10-1493038-0000 (February 6, 2015) Korea Utility Model Registration No. 20-0427815-0000 (September 25, 2006)

The present invention was developed to solve the above-mentioned problems, and its purpose is to improve the drug inlet provided in the segment forming the tunnel to inject the drug without using a sealing member that requires removing the plastic packaging and disposing of the packaging on site. A chemical agent formed in the tunnel segment to prevent leakage of the injected drug or backfilling material and prevent water leakage problems that may occur after curing by using a fastening inner pipe equipped with a check valve and an intermediate screw inner pipe equipped with an O-ring. The goal is to develop a waterproof structure for the injection port.

In order to achieve the above object, the present invention includes a main body with a female thread formed along the inner circumferential surface that is embedded so as to penetrate the segment when forming a segment for forming a tunnel, an end cap made of a cylindrical shape with one side closed and coupled to the outer portion of the tunnel of the main body, and In the waterproof structure of the drug injection port formed in the tunnel segment, which includes a closing cap that is threaded on the outer peripheral surface and coupled to the inner portion of the tunnel of the main body;

The main body has an end cap coupling portion on an outer diameter side coupled to the end cap, and an end cap having a protruding extension portion whose inner diameter and outer diameter are taperedly reduced and extended;

It rotates by a first male thread portion corresponding to the female thread portion of the main body on the outer peripheral surface, an insertion coupling portion whose inner diameter is taperedly reduced and inserted into the protruding extension portion, and a torsion spring mounted on the insertion coupling portion at one end. A fastening inner pipe consisting of a disk-shaped check valve plate on which pressure acts in the direction of blocking the insertion coupling portion, and a plurality of first tool engaging protrusions radially protruding at regular intervals from the other inner diameter of the insertion coupling portion;

At one end, the outer peripheral surface is shortened to a step and extended long, and is inserted into the inside of the insertion coupling part. An insertion step is installed and fixed with an O-ring on the outer diameter surface of the end, and is formed in a stepped portion on the opposite side of the insertion step to form a female thread part of the main body. It is characterized by comprising a second male screw portion coupled correspondingly, and an intermediate screw member having a plurality of second tool engaging protrusions that are recessed on the surface facing the inside of the tunnel and protrude radially at regular intervals on the inner diameter.

In addition, it is formed in a cylindrical shape with an outer diameter that corresponds to the inner diameter of the protruding extension portion of the fastening inner pipe;

A check valve plate in which a fixing protrusion of a shape whose diameter gradually expands and then contracts is formed in the center of the surface toward the outside of the tunnel, both ends are rotatably elastically fixed to the inner diameter surface of the side where the fixing protrusion is formed, and the center is bent to It is characterized in that a check valve unit including a torsion spring that surrounds the fixing protrusion and is integrally connected is coupled to the protruding extension.

In addition, a locking step portion is formed in the middle of the inner diameter of the insertion coupling portion of the fastening pipe, the inner diameter of which is gradually expanded and extending to the outer end of the tunnel, and the check valve plate is in close contact with the expanded surface of the locking step portion along one side edge. The fixing protrusions are formed on opposite surfaces in close contact, and a pair of the torsion springs are spaced apart from each other, formed on the inner diameter surface, and both ends are fixed through the spring fixing protrusions with through holes formed on the opposing surfaces. It is characterized in that both sides are symmetrically bent upward to form a coil for elastic restoring force, and then have a shape that surrounds the fixing protrusion and is integrally connected.

As described above, the present invention is provided with a check valve at the end of the inner female thread of the body of the drug injection port embedded and fixed in the segment, which opens to force from the inside of the tunnel to the outside, so that the injection port is pushed in and opened, and the drug or backfilling material is injected. When filling and separating the inlet, the check valve is closed to primarily prevent leakage, and the two parts are combined in a sequential operation of combining the intermediate threaded inner pipe with an O-ring that adheres closely to the fastening inner pipe. This has the effect of blocking the passage of moisture from chemicals, backfill material, or groundwater, and has the effect of allowing work to be done easily and quickly because there is no sealing member.

1 is a perspective view showing a drug injection port according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a drug injection port according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing the drug injection port viewed from the rear according to an embodiment of the present invention.
Figure 4 is a conceptual diagram showing a state in which a drug injection port is installed in a segment according to an embodiment of the present invention.
Figure 5 is a conceptual diagram showing the end cap puncturing process before injecting a drug according to an embodiment of the present invention.
Figure 6 is a conceptual diagram showing the process immediately before drug injection in a state in which the fastening tube according to an embodiment of the present invention is combined.
Figure 7 is a conceptual diagram showing the process of combining the intermediate screw member according to an embodiment of the present invention.
Figure 8 is a conceptual diagram showing a state in which construction is completed according to an embodiment of the present invention.

Accordingly, the configuration of the present invention will be described in detail with the accompanying drawings so that those skilled in the art can easily understand and reproduce it.

Figure 1 is a perspective view showing a drug injection port according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing a drug injection port according to an embodiment of the present invention, and Figure 3 is a rear view according to an embodiment of the present invention. This is an exploded perspective view showing the drug injection port, which consists of a main body 11 with a female thread 111 formed along the inner circumferential surface that is embedded to penetrate the segment S during molding of the segment S for forming a tunnel, and a cylindrical shape with one side closed. It is formed in a tunnel segment that includes an end cap 12 coupled to the outer part of the tunnel of the main body 11, and a finishing cap 13 with threads formed on the outer peripheral surface and coupled to the inner part of the tunnel of the main body 11. In the waterproof structure of the drug injection port (1);

The main body 11 has an end cap coupling portion 112 on which the outer diameter of the end cap 12 is coupled to the end cap 12, and the inner diameter and the outer diameter of the end are reduced to a level. It is provided with a protruding extension portion 113 that extends;

A first male threaded portion 141 corresponding to the female threaded portion 111 of the main body 11 on the outer peripheral surface, an insertion coupling portion 146 whose inner diameter is reduced to a step and inserted into the protruding extension portion 113, and At one end, there is a disk-shaped check valve plate 143 that rotates by a torsion spring 142 mounted on the insertion coupling portion 146 and exerts pressure in the direction of blocking the insertion coupling portion 146, and the insertion coupling portion 146. A fastening inner pipe 14 composed of a plurality of first tool engaging protrusions 144 that protrude radially at regular intervals on the other inner diameter of the part 146;

One end has an insertion step 152 whose outer peripheral surface is reduced to a step, extends long, and is inserted into the insertion coupling portion 146, and is fixed with an O-ring 151 on the outer diameter surface of the end, and an insertion step 152. A second male threaded portion 153 is formed on the stepped expanded portion on the opposite side and engages correspondingly with the female threaded portion 111 of the main body 11, and is recessed on the surface facing the inside of the tunnel and protrudes radially at regular intervals on the inner diameter. The waterproof structure of the drug injection port formed in the tunnel segment is shown, which is characterized by having an intermediate screw member 15 having a plurality of second tool engaging protrusions 154.

As is well known, the main structure (11), end cap (12), and closing cap (13), which are the basic structure of the drug injection port (1), are the same as those of the prior art, but protrude at the end of the main body (11). There is a difference in that the extension portion 113 is formed.

However, in order to achieve a waterproof structure, the existing fastener for inserting a sealing material and pressurizing and sealing it is not inserted into the main body (11), but the fastening pipe (14) of this hospital has a built-in check valve, so that the chemical is mainly used as a back filler. When injecting between the segment (S) and the ground, it is designed to be blocked in the direction opposite to the opening.

At this time, the space between the inner diameter of the protruding extension 113 and the outer diameter of the insertion coupling portion 146 to be fitted must be designed and manufactured to minimize the gap to prevent moisture from leaking there.

The main configuration of the present invention is to block moisture that may leak through the gap of the check valve by the intermediate screw member 15 by using the insertion step 152 on which the O-ring 151 is mounted.

Hereinafter, the specific configuration of the present application will be described in detail according to the drawing showing the work sequence.

Figure 4 is a conceptual diagram showing a state in which a drug injection port is installed in a segment according to an embodiment of the present invention, and Figure 5 is a conceptual diagram showing the end cap puncturing process before injecting a drug according to an embodiment of the present invention. The drug inlet (1) is provided in an integrally embedded and fixed form when manufacturing the segment (S), and at this time, the end cap (12) and the finishing cap (13) are installed to prevent foreign substances from entering the main body (11). am.

When the excavation of the ground (G) is completed, the segment (S) is installed. As shown, in a state where the space is separated from the ground (G), the cement-based backfill material is promoted and the segment (S) is placed in the ground (G). In order to overcome friction and move, injection of medication is necessary.

Therefore, the worker separates the finishing cap 13 and attaches a drill tool to the fastening equipment (T) to drill the end cap 12 to create a state in which the chemical or backfill material can be filled.

Figure 6 is a conceptual diagram showing the process immediately before drug injection in a state in which the fastening tube 14 is combined according to an embodiment of the present invention. As described above, the present institution injects the medicine inlet (A) with the fastening tube 14 coupled. The check valve plate (143) is pushed by the pressure of the injection pressure to form a space for the drug to be injected. When the pressure is released, the check valve plate (143) is injected by the torsion spring (142). ) has a structure that blocks the entrance.

At this time, the main body is formed in a cylindrical shape with an outer diameter that corresponds to and engages the inner diameter of the protruding extension portion 113 of the fastening inner pipe 14;

A check valve plate (143) in which a fixing protrusion (147) whose diameter gradually expands and then contracts is formed in the center of the surface toward the outside of the tunnel, and both ends are rotatable on the inner diameter surface of the side where the fixing protrusion (147) is formed. An embodiment characterized in that the check valve unit 149, which is elastically fixed and has a torsion spring 142 that is bent at the center and integrally connected to the fixing protrusion 147, is coupled to the protruding extension portion 113. It was additionally presented.

In this embodiment, the check valve unit 149, which has a structure of a torsion spring 142 and a check valve plate 143 to form a check valve structure, is separately manufactured and combined to confirm operation and then combine them to prevent changes in material. This can increase the reliability of operation.

This application shows coupling by interference fitting, but screw coupling is also possible, but as a prerequisite for the coupling method, a structure that ensures satisfactory watertightness at the coupling part must be selected.

In addition, the insertion coupling part 146 of the fastening inner pipe 14 is formed with a stopping step 145 whose inner diameter is gradually expanded in the middle of the inner diameter and extends to the outer end of the tunnel, and the check valve plate 143 It is configured to be in close contact with the expanded surface of the locking step 145 along one edge of the surface, and the fixing protrusion 147 is formed on the opposite surface to which it is in close contact, and a pair of the torsion springs 142 are spaced apart from each other on the inner diameter surface. Both ends are fixed through the spring fixing protrusion 148, which has a hole formed on the opposing surface, and both sides are symmetrically bent upward to form a coil for elastic restoring force, and then wrapped around the fixing protrusion 147. A more detailed structure characterized by an integrally connected shape was additionally presented.

This structure prevents moisture from penetrating into the main body 11 by allowing the check valve plate 143 to adhere closely to the stopping step 145 in normal times, and as shown, the edge portion of the check valve plate 143 is in close contact with the The part shown in black is equipped with a soft material with elastic restoring force, and although pressure is applied by the restoring force of the torsion spring 142, it is possible to have a more acceptable waterproof structure.

Figure 7 is a conceptual diagram showing the process of combining the intermediate screw member according to an embodiment of the present invention, and Figure 8 is a conceptual diagram showing the completed state of construction according to an embodiment of the present invention, and the present application refers to the fastening tube (14) After having a primary waterproof structure by combining, the intermediate threaded part 15 is combined, and the second male threaded part (corresponding to the female threaded part 111 of the main body 11) is connected by the tool of the fastening equipment (A). If the insertion step 152, which enters while rotating by 153) and is finally equipped with the O-ring 151, is coupled to the inside of the insertion coupling portion 146 of the fastening inner pipe 14, the intrusion of moisture is blocked.

At this time, the intermediate screw member 15 has a closed structure rather than an open tubular shape, and in addition to having the same structure as the second tool engaging protrusion 154, it has a tool groove shape that can be used with a hexagonal wrench, which is most commonly used in the field. It's okay.

Afterwards, construction is completed by combining the finishing cap 13. This structure prevents the moisture of the injected chemical or backfill material from flowing back and prevents groundwater from flowing into the area even after construction.

In addition, the existing sealing member or sealing material has the property of hardening when in contact with air, and is provided in a sealed plastic packaging to eliminate the inconvenience of unpacking and disposing of the plastic during work. Since there is no hardening sealing member, it can be used depending on the situation. It has the advantage of enabling repeated work by allowing lubricant to be added when moving the segment and backfilling material to be added when the segment is completely fixed.

1: Drug injection port
11: main body
111: female thread part 112: end cap coupling part
113: protruding extension
12: end cap
13: Closing cap
131: Tool hole
14: fastening tube
141: first male thread 142: torsion spring
143: check valve plate 144: first tool coupling protrusion
145: Hooking step 146: Insertion coupling portion
147: fixing protrusion 148: spring fixing protrusion
149: Check valve unit
15: Intermediate screw member
151: O-ring 152: Insertion step
153: Second male thread 154: Second tool coupling protrusion
S: segment
T: Fastening equipment
D: Backfill material
G: Ground
A: Medicine inlet

Claims (3)

When forming the segment (S) for forming a tunnel, the main body (11) is embedded so as to penetrate the segment (S) and has a female thread 111 formed along the inner circumferential surface, and is formed in a cylindrical shape with one side closed, so that it is attached to the outer part of the tunnel of the main body (11). It includes an end cap 12 that is coupled, and a finishing cap 13 that is threaded on the outer peripheral surface and coupled to the inner part of the tunnel of the main body 11, and the main body 11 is coupled to the end cap 12. The side outer diameter is provided with an end cap coupling portion 112 that is threaded to engage with the end cap 12, and the end is provided with a protruding extension portion 113 in which the inner diameter and outer diameter are gradually reduced and extended; A first male threaded portion 141 corresponding to the female threaded portion 111 of the main body 11 on the outer peripheral surface, an insertion coupling portion 146 whose inner diameter is reduced to a step and inserted into the protruding extension portion 113, and At one end, there is a disk-shaped check valve plate 143 that rotates by a torsion spring 142 mounted on the insertion coupling portion 146 and exerts pressure in the direction of blocking the insertion coupling portion 146, and the insertion coupling portion 146. A fastening inner pipe 14 composed of a plurality of first tool engaging protrusions 144 that protrude radially at regular intervals on the other inner diameter of the part 146; One end has an insertion step 152 whose outer peripheral surface is reduced to a step, extends long, and is inserted into the insertion coupling portion 146, and is fixed with an O-ring 151 on the outer diameter surface of the end, and an insertion step 152. A second male threaded portion 153 is formed on the stepped expanded portion on the opposite side and engages correspondingly with the female threaded portion 111 of the main body 11, and is recessed on the surface facing the inside of the tunnel and protrudes radially at regular intervals on the inner diameter. In the waterproof structure of the drug injection port formed in the tunnel segment including an intermediate screw member 15 having a plurality of second tool engaging protrusions 154,
It is formed in a cylindrical shape with an outer diameter corresponding to the inner diameter of the protruding extension portion 113 of the fastening inner pipe 14;
A check valve plate (143) in which a fixing protrusion (147) whose diameter gradually expands and then contracts is formed in the center of the surface toward the outside of the tunnel, and both ends are rotatable on the inner diameter surface of the side where the fixing protrusion (147) is formed. A check valve unit 149 having a torsion spring 142 that is elastically fixed and bent in the center to surround and integrally connect the fixing protrusion 147 is coupled to the protruding extension 113. In the tunnel segment, Waterproof structure of the chemical injection port formed. delete According to clause 1,
In the insertion coupling part 146 of the fastening inner pipe 14, a stopping step 145 is formed in the middle of the inner diameter, the inner diameter of which is gradually expanded and extending to the outer end of the tunnel, and the check valve plate 143 has one side. It is configured to be in close contact with the expanded surface of the locking step 145 along the edge, and the fixing protrusion 147 is formed on the opposite surface to which it is in close contact, and a pair of torsion springs 142 are formed on the inner diameter surface with a pair spaced apart from each other. Both ends are penetrated and fixed to the spring fixing protrusion 148, which has a hole formed on the opposing surface, and both sides are symmetrically bent upward to form a coil for elastic restoring force, and then integrally wrapped around the fixing protrusion 147. A waterproof structure of a drug injection port formed in a segment characterized by having a connected shape.

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