KR20180093568A - Connecting method for temporary ventilation duct - Google Patents

Abstract

According to an embodiment of the present invention, a connecting method for a ventilation duct during construction comprises: a first step of connecting a first duct and a second duct by putting a dead end portion of the first duct into a dead end portion of the second duct; and a second step of surrounding a connected portion of the first duct and the second duct with an air leakage prevention film connected to the dead end portion of the first duct.

Description

{CONNECTING METHOD FOR TEMPORARY VENTILATION DUCT}

The present invention relates to a method for connecting a ventilation duct (a wind tunnel) installed during tunnel construction (under construction).

Currently, the ventilation duct (vent pipe) connection method applied to ventilation equipment in domestic railway and road tunnel construction employs a method in which both sides of the ring type duct are stitched together at regular intervals using wire. It was analyzed that the leakage amount of 1.5% (binding 16 times of wire) ~ 3.0% (binding of 8 times of wire) per 100m was found to occur. The calculation of the ventilation equipment during the construction of the railway and road tunnel is carried out according to the "KR C-12120 (Ventilation and Lighting Equipment)" and "Road Design Manual". Generally, the ventilation rate of the wind tunnel is "1.5% / 100m" And the like.

In recent years, the tunnel construction of Daegwallyeong Tunnel is 50km and the tunnel of Yeongyun Tunnel is 50km. Domestic tunnel tunnel is 50km in Korea, and Euro Tunnel is about 30km, Gotthard Tunnel is 57km, Lotiburg Tunnel is 34.6km, 28.4km in the case of the extension of the tunnel is showing the conversation. In addition, since the submarine tunnels between Hanam and Jeju in the future, which are over 100km in length, and the construction of the Hanil submarine tunnels and the Hanzong submarine tunnels are being considered in the future, studies on ventilation during the construction of the tunnels and reduction of the noise are becoming important issues.

In such a situation, when the ducting rate of the duct during the tunnel construction is set to 1.5% / 100 m, the total amount of fan flow becomes larger as the ventilation period becomes longer, and thus the fan capacity and the static pressure increase, There is a problem that the power increases and the economical efficiency decreases, so that it is necessary to secure a work area for every predetermined interval. In addition, when excavating the sea floor, it is necessary to construct an island or an artificial island to install the ventilation holes at regular intervals, but it may be difficult to install the ventilation facilities due to geographical conditions. However, when the occurrence of the rust in the ventilation pipe connecting portion is reduced, the required air flow and power can be reduced, and the interval between the ventilation holes can be further extended, thus making it possible to construct more economical.

 Therefore, it is urgently required to develop the technology related to the construction of the tunnel connection, which satisfies the environmental conditions in the tunnels in construction of the tunnel of the tunnel, and causes a considerable reduction in the construction cost and minimizes the occurrence of the wind tunnel to be.

As an example, Korean Utility Model Publication No. 1999-0019932 discloses a "ventilation pipe ".

In order to solve the above-mentioned problems, an embodiment of the present invention is to provide a method of connecting a wind tunnel during a construction which minimizes the leakage of wind by applying an intermittent connection method of a ring time duct using a wind shield.

In order to achieve the above-mentioned object, a method of connecting an in-service piping according to an exemplary embodiment of the present invention includes a first step of connecting a first duct to a second duct by inserting a first duct end into a second duct end; And a second step of enclosing a connection portion between the first duct and the second duct by a leakage preventive film connected to the first duct end portion; . ≪ / RTI >

In addition, the first duct and the second duct may be tubular type.

In addition, a ring may be built in the end of the first duct and the end of the second duct.

Also, the leaking prevention film may be an integral structure that is attached to the first duct end portion or extends from the first duct end portion.

In addition, the leakage preventive film may be in close contact with the outer surface of the second duct.

In addition, the third step of wrapping the leakage preventing film part with the lid for adhesion once more; As shown in FIG.

Further, the lid for close contact may further include a body portion for once wrapping the leakage preventing film portion; And a ring portion formed along both ends of the body portion; . ≪ / RTI >

In addition, a wire is coupled to the inside of the ring portion, both ends of the wire are connected by a tightening device, and the wire can be tightened by the tightening device.

Also, the tightening device may be a turnbuckle.

In addition, the wire inside the ring portion is tightened between the both end ring portions of the lid for closing to locate the connection portion between the first duct end portion and the second duct end portion, so that the lid for attachment can be closely contacted to the first duct and the second duct ; As shown in FIG.

According to the method of connecting a pipe during construction according to an embodiment of the present invention, it is possible to minimize the leakage of the air by applying the staggered connection method of the ring type duct using the air leakage preventing film.

In addition, it reduces the fan air flow rate and power consumption due to the reduction of the fan air volume, which is very economical compared to the conventional fan connection method.

In addition, it is possible to prevent the leakage of the connecting portion between the first duct and the second duct.

Further, the first duct and the second duct are inflated by the high pressure by the high-pressure deity air supply into the first duct and the second duct, so that the adhesion with the air blast prevention film is further increased, and the effect of preventing the air leakage can be increased.

1 is a view showing a connection state between a first duct and a second duct according to a preferred embodiment of the present invention.
2 is a view illustrating a state in which a first duct and a second duct are connected by inserting an end of a first duct into an end of a second duct according to a preferred embodiment of the present invention.
FIGS. 3 and 4 are views illustrating a process of wrapping a connection portion between a first duct and a second duct with a foil prevention film according to a preferred embodiment of the present invention.
5 is an enlarged view of a close lid according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

In the method of connecting a wind tunnel in a construction according to an embodiment of the present invention, the ends of the ducts of the two ducts to be connected to each other are stuck to each other, the wind shielding film provided on one duct is wrapped over the other duct, .

As shown in FIG. 1, a method of connecting a pipe during construction according to an embodiment of the present invention includes a first step S100 of inserting and connecting a first duct 10 into a second duct 20, And a second step S200 of enclosing the first duct 10 with the connection portion of the second duct 20. [ In addition, the method may further include a third step (S300) of once wrapping the wrapped portion with the lid prevention film (30) with the lid (50) for adhesion. The wire 60 inside the ring portion 52 is tightened with the connecting portion of the first duct end portion 11 and the second duct end portion 21 positioned between the both end ring portions 52 of the lid 50 The method may further include a fourth step S400 of causing the lid 50 to closely contact the first duct 10 and the second duct 20.

Hereinafter, a method of connecting a wind tunnel in construction according to an embodiment of the present invention will be described in more detail as follows.

As shown in FIGS. 1 and 2, the first duct 10 and the second duct 20 are disposed in a staggered manner in which the end portion 11 of the first duct 10 is inserted into the end portion 21 of the second duct 20, Connect the duct (20). The first duct (10) and the second duct (20) may be a pipe type which can supply fresh air to the inside.

The air leakage preventive film 30 is connected to the end portion 11 of the first duct 10. The leakage preventive film 30 should be designed to have a length enough to cover the connection portion between the first duct 10 and the second duct 20. [ For example, the barrier film 30 may be bonded (31) to the end portion 11 of the first duct 10. The air leakage preventive film 30 may have an integral structure with the first duct 10 extending to the end portion 11 of the first duct 10.

The outer shape of the end portion 11 of the first duct 10 and the end portion 21 of the second duct 20 may be circular. A ring 40 is coupled to the end 11 of the first duct 10 and the end 21 of the second duct 20.

As shown in FIGS. 1, 3 and 4, in the connected state of the end portion 11 of the first duct 10 and the end portion 21 of the second duct 20, the first duct 10 and the second duct 20, (20) is wrapped around the connecting portion of the gas leakage prevention film (30). Specifically, the air leakage preventing film 30 is wrapped around the end portion 21 of the second duct 20 so as to return the outer surface of the end portion 11 of the first duct 10 located inside the second duct 20, Wrap. The air blast prevention film 30 is adhered to the outer surface of the second duct 20 to prevent air leakage.

As shown in Figs. 1 and 5, the lid 50 for close contact includes a main body portion 51 and a ring portion 52. Fig. The main body portion 51 once more winds around the portion of the air blast prevention film 30 surrounding the connection portion between the first duct 10 and the second duct. The ring portion 52 is formed along both ends of the main body portion 51. A wire (60) is coupled to the inside of the ring portion (52). Both ends of the wire (60) are connected by a fastening device (61). The wire 60 can be tightened by the tightening device 61. [ The tightening device 61 is not limited, and any device that can tighten the wire 60 is possible. For example, the tightening device 61 may be a turnbuckle.

As described above, in the method of connecting a pipe during construction according to an embodiment of the present invention, the leakage preventing membrane does not generate a leakage in the direction of the first duct because it completely covers the connection portion between the first duct and the second duct. Further, since the portion of the leakage preventing film is further wrapped with the lid for contact, the leakage can be completely prevented. Also, as the distance between ventilation sections increases, a high pressure is required to supply fresh air to the surface, and the first duct and the second duct are further inflated by the high pressure due to the high-pressure deity air supply into the first duct and the second duct The adhesion force with the air blast prevention film is further increased, and the air blast prevention effect can be increased. On the other hand, a soft filler may be inserted into the lid for adhesion to improve the anti-leakage performance by increasing adhesion.

≪ In the embodiment  Under construction The  Connection method Rust  Performance experiment>

Reduced airflow target: The airflow target to realize a single fan ventilation for a ventilation distance of 15 km is set to "2.18 mm2 / m2" based on SIA196's airflow area.

First (Initial application): Applicability and improvement point of connection after test manufacture.

After the second improvement: the area of the spillway due to the wind shear and the rear spillway was measured as "1.47 mm2 / m2", and the spill target was sufficiently achieved (average of 6 experiments).

After the third improvement: As a result of the experiment, the blowing area of the front and rear ends of the wind tunnel was measured as "1.43 mm2 / m2", and the blowing target was sufficiently achieved (average of four times of the experiment).

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: First duct
11:
20: Second duct
21:
30:
31: Adhesion
40: ring
50: Adhesive cover
51:
52: Rings
60: wire
61: Fastening device

Claims (10)

A first step of connecting the first duct and the second duct by inserting the first duct end into the second duct end; And
A second step of enclosing a connection portion between the first duct and the second duct by a leakage preventing layer connected to the first duct end portion;
The method comprising the steps of:
The method according to claim 1,
The first duct and the second duct are connected to each other through a through-
Wherein the pipe is of a tubular type.
The method according to claim 1,
Wherein a ring is installed inside the end portion of the first duct and inside the end portion of the second duct.
The method according to claim 1,
Preferably,
Wherein the first duct has an integral structure that is adhered to the first duct end portion or extends from the first duct end portion.
The method according to claim 1,
Preferably,
And the second duct is in close contact with the outer surface of the second duct.
The method according to claim 1,
A third step of wrapping the leakage preventing film part once more with a lid for contact;
The method comprising the steps of:
The method of claim 6,
The above-
A main body part for once wrapping the leakage preventing film part; And
A ring portion formed along both ends of the body portion;
The method comprising the steps of: The method of claim 7,
Wherein the wire is coupled to the inside of the ring portion, both ends of the wire are connected by a tightening device, and the wire is tightened by the tightening device.
The method of claim 8,
The tightening device comprises:
Wherein the turnbuckle is a turnbuckle.
The method of claim 7,
The wire inside the ring portion is tightened between the both end ring portions of the lid for closing to locate the connection portion between the first duct end portion and the second duct end portion so that the lid for attachment is brought into close contact with the first duct and the second duct Step 4;
The method comprising the steps of:

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