KR102126491B1 - Construction structure of separated ventilation slab for tunnel - Google Patents

Abstract

The present invention relates to a structure for installing a segmented wind duct slab in a tunnel in which a load is not concentrated on a specific part and thus a structural stability can be obtained.
The installation structure of the segmented wind tunnel of the tunnel of the present invention is divided into two, and one end of each tunnel is supported by brackets formed along both sides of the tunnel lining, and the other end of the tunnel is installed as a segmented wind tunnel of the slab in abutment.
Provided is a segmental-type wind-level slab installation structure of a tunnel composed of eye bolts formed on butt surfaces of the wind-level slabs and fixing bars that bind each other in a state in which the eye bolts are overlapped.

Description

Installation structure of a segmented wind-proof slab in a tunnel{CONSTRUCTION STRUCTURE OF SEPARATED VENTILATION SLAB FOR TUNNEL}

The present invention relates to a structure for installing a segmented wind duct slab, and more particularly, to a structure for installing a segmental duct wind slab in a tunnel in which a load is not concentrated on a specific part to obtain structural stability.

In general, the tunnel structure is equipped with a tunnel ventilation system to protect tunnel users from emergency, such as smoke, harmful gas, dust and fire inside the tunnel.

There are various types of tunnel ventilation equipment, and many efficient cross-flow ventilation methods are being constructed.

The cross-flow ventilation method is the most reliable ventilation method in case of fire, and it is suitable for urban areas with heavy traffic due to the large cross-sectional area inside the duct.

This cross-flow ventilation method is to allow ventilation inside the tunnel by installing a tunnel lining after excavation and forming a space on the upper side of the tunnel lining, or by installing a wind-level slab made of two concrete panels.

At this time, one end of the segmented wind road slab is supported by the brackets formed on both sides of the tunnel lining, and the other end ends of the wind road slab are bound to each other and fixed to the hinge by hanging on a fixed structure installed at the top of the tunnel.

However, such a pungdo slab is not only difficult to install, but also has a disadvantage in that safety problems and construction cost are increased due to the departure of the slab.

As another installation method, there is a construction method in which an L-shaped segmental slab is installed butt-by-side and the compression section of the butt cross-section is prevented from falling.

However, such a wind strength slab is formed with a binding reinforcing portion in a binding portion that is a butt surface, while the binding reinforcing bar and the hinge portion are located in a compressive stress portion that is above the bonding surface, while a member that resists tensile force is located below the bonding surface where a lot of tensile stress is concentrated There is no disadvantage in that it is very vulnerable to sagging of Pungdo slab.

As a result, structural problems may occur in the wind level slab, and when the wind level slab is installed, the compressed surface is not completely matched, and thus there is a high risk of damage due to eccentric load.

In addition, since the partition wall is installed in the fixed structure, many additional devices are required to fix the partition wall.

Korean Patent Publication No. 10-2017-0096392

The present invention has been proposed to solve the conventional problems as described above, the object of the present invention is to provide a segmented wind tunnel slab installation structure having a structural sense of stability because the load is not concentrated on a specific site.

Still another object of the present invention is to provide a segmented wind degree slab installation structure capable of firmly fixing both ends of the wind degree slab to the bracket and maximizing the binding force of the butt surface to which the wind degree slab is bound.

Segmented wind tunnel slab installation structure of the tunnel proposed by the present invention is divided into two, and one end of each is supported by brackets formed along both sides of the tunnel lining, and the other end of the tunnel is installed in a segmented wind tunnel of the slab in abutment. as,

Provided is a segmental-type wind-level slab installation structure of a tunnel composed of eye bolts formed on butt surfaces of the wind-level slabs, and fixed bars that bind each other in a state in which the eye bolts are overlapped.

In addition, the present invention is divided into two, each one end is supported by brackets formed along both sides of the tunnel lining, and the other end is a segmented wind-level slab installation structure of the tunnels that are joined against each other,

Segmented wind-level slab installation structure of an eyebolt formed on the butt surface of the wind-level slab, a fixed bar for binding each of the eye-bolts in an overlapped state, and a tunnel fixed to the tunnel in a state bound to the fixed bar Provides

A shear key groove is formed at an end of the butt surface of the wind degree slab, and inserts are respectively installed to prefabricately install eye bolts in the shear key groove.

The insert is installed eccentrically toward the bottom from the center of the end of the butt surface of the wind degree slab, so that the eye bolt can be installed toward the bottom.

A mortar is filled in the binding portion forming the butt surface of the wind degree slab, and a fire-resistant barrier wall that is not easily burned is formed in the lower portion of the binding portion.

The wind degree slab may be installed to be inclined upward from the portion fixed to the bracket to the butt surface portion, and the portion fixed to the bracket of the wind degree slab may be further fixed with an anti-floating key to prevent the wind degree slab from being floated. In addition, the end portion fixed to the bracket of the wind degree slab can be further fixed with mortar.

Segmented wind tunnel slab installation structure of the tunnel according to the present invention, when tensile stress is generated in the upper compression section of the butt surface, the binding rebar is excluded, and the eye bolts are provided at the ends where the two wind slabs are bound to overlap these eye bolts. Since the mortar is filled after the fixing bar is fitted in the state, the load is not concentrated on a specific part of the wind strength slab, and the compressive stress is evenly distributed at the upper part of the joint surface, and the eye bolt is strongly resisted to the tensile stress at the lower part. The stability of the wind slab can be obtained.

In addition, since the eye bolt is biased from the middle portion to the lower portion, the binding portion is formed at the lower portion of the center portion, so that the binding of the wind level slab can be further strengthened.

In addition, at one end of the windshield slab supported by the bracket, the installed position can be firmly fixed even after the windbreak slab is constructed by fixing the bracket to the bracket with an anti-floating key, and even after a buoyancy force due to the passage of the vehicle occurs.

In addition, since the wind pressure slab is installed upward in the center of the tunnel, part of the shear force is converted to axial force and transmitted to the tunnel lining, so the burden on the member is reduced, and the cross section of the compression section is increased by increasing the lower section of the butt surface. It works.

In addition, the binding section where the wind strength slab joins the bracket and the tunnel lining can be filled with a mortar in the shear key groove and the butt surface to integrate the binding section. Can be obtained.

In addition, a fire-resistant barrier is formed at the lower portion of the binding portion of the wind-resistant slab, so even if a fire occurs in the tunnel, the heat-resistant slab's binding force is released by blocking heat transfer to the E bolt and the fixed bar located inside the binding portion. It is possible to minimize the damage to life caused by a fire because it prevents the wind level slab from collapsing.

1 is a front view for explaining the installation of a wind-level slab in a tunnel-type wind-level slab installation structure of a tunnel according to the first embodiment of the present invention.
FIG. 2 is a view of the wind turbine slab viewed from the front in order to explain the installation structure of the segmental wind tunnel slab according to the first embodiment of the present invention.
3 is an enlarged view of a binding portion of a structure for installing a segmented wind duct slab in a tunnel according to a first embodiment of the present invention.
Figure 4 is an enlarged view of the binding portion of the installation structure of the segmental wind tunnel slab according to the first embodiment of the present invention as viewed from a plane.
FIG. 5 is a front view for explaining the installation of a wind-level slab in a structure for installing a segment-type wind-level slab in a tunnel according to a second embodiment of the present invention.
Figure 6 is an enlarged view of the binding portion of the installation structure of the segmental wind tunnel slab according to the second embodiment of the present invention.
7 is an enlarged view of a binding portion of a structure for installing a segmental wind tunnel of a tunnel according to a second embodiment of the present invention, as viewed from a plane.
8 is a longitudinally joined cross-sectional view of a wind tunnel slab in a tunnel-type wind tunnel slab installation structure according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 is a front view for explaining the installation of a wind-level slab in a structure for installing a segmented wind-level slab of a tunnel according to a first embodiment of the present invention, and FIG. 2 is a segmented wind-level of a tunnel according to a first embodiment of the present invention In order to explain the slab installation structure, it is a view of the wind level slab viewed from the front, and FIGS. 3 and 4 are enlarged and plan views of the binding part, which is a main part of the installation structure of the segmented wind level slab of the tunnel according to the first embodiment of the present invention. .

As shown, the wind degree slab 2 is installed to supply or exhaust air along the longitudinal direction of the upper surface inside the tunnel 100.

The wind degree slab 2 provided in the present invention is a segmented slab divided into two, and while constructing a tunnel lining to install the wind degree slab 2, brackets 110 are formed on both sides of the tunnel lining.

In addition, it can be installed using a temporary vent 200 that is supported so that the heavy wind slab 2 is temporarily mounted while being movable along the inside of the tunnel 100.

The temporary vent 200 may use a structure commonly used when constructing a tunnel or a structure similar to that, so a detailed description thereof will be omitted.

The wind degree slab (2) can be manufactured and used as precast concrete (PC) made of a certain size in the factory, and the length of the wind slab connected by two is made slightly larger than the width of the tunnel to be installed to raise the wind degree slab. It is formed to be installed obliquely.

The segmented wind degree slab 2 is mounted on one side end of the bracket 110 and the other end located at the center of the tunnel is mounted on the temporary vent 200.

At this time, the height of the hypothesis vent 200 is formed to a higher position than the bracket 110 so that the wind degree slab 2 is mounted obliquely upward from the bracket 110 toward the hypothesis vent 200.

In this state, the butt surfaces 22, which are the facing surfaces of the two-sided wind strength slabs 2, are maintained at a spaced apart from each other, and in this state, the hydraulic jacks of the hypothesis vents 200 are gradually lowered to gradually lower the two-sided wind strength slabs. (2) is fitted to the installation position, and the facing surface of the wind degree slab 2 is bound and installed.

The wind degree slab 2 provided in the present invention is fixed to the eye bolts 4 in a state where the eye bolts 4 are fixed to the butt surfaces 22 facing each other, and these eye bolts 4 are superimposed on each other. (6) The two butt-faced faces 22 of the two-dimensional slab 2 can be fitted to each other.

The eyebolts 4 can be assembled and fixed to the inserts 8 formed at each end of the wind degree slab 2 in a prefabricated manner. Thus, when the both ends of the wind strength slab 2 are bound using the eyebolt 4 and the fixing bar 6, and the mortar is filled in the binding portion in a subsequent process, the load is applied to a specific portion of the wind strength slab 2 as in the prior art. This concentration is not evenly distributed and the stability of the wind slab becomes higher.

A recessed shear key groove 10 is formed in the butt surface 22, which is the end portion of the wind turbine slab 2 where the insert 8 is installed, and substantially the insert 8 is formed in the shear key groove 10, thereby It is installed in the part which went inward from the butt surface 22.

Subsequently, after mounting of the wind degree slab 2 is completed, the mortar 12 is filled in the binding portion. Accordingly, the mortar 12 is filled with the binding portion of the shear key groove 10 and the wind degree slab 2 The eye bolt 4 is fixed more firmly. Therefore, since the groove of the binding portion of the wind strength slab 2 acts as a shear key and resists the shear force generated by the upper load and the member, the compressed surface is integrally formed to provide structural stability.

In addition, the insert 8 is not formed at the center of one end, which is the butt surface 22 of the wind storm slab 2, but is biased toward the lower side, whereby the eye bolt 4 is the center of the butt surface of the wind storm slab 4 In the lower tensile stress is generated to provide a higher binding force.

In addition, the wind degree slab 2 of the present invention may further form a fire resistant barrier 14 that does not easily burn on the lower side of the binding portion before filling the mortar 12 in the binding portion that is the butt surface 22.

This fire-resistant barrier wall 14 serves to block heat transfer to the eyebolt 4 and the fixing bar 6 made of metal without being easily burned when a fire occurs.

Accordingly, even if a fire occurs in the tunnel, the fireproof barrier 14 blocks the heat transfer to the E bolt 4 and the fixing bar 6 so that the binding portion of the wind degree slab 2 is released to release the wind degree slab 2 ) Can be prevented from collapsing, minimizing human damage in case of fire.

Such a fire-resistant barrier 14 can be formed using, for example, refractory silicon.

The obliquely installed wind strength slab 2 serves to convert the shear force into axial force, and the mortar 16 is filled between the end portion supported by the bracket 110 of the wind strength slab 2 and the tunnel lining to fill the wind strength slab ( The end of 2) is fixed.

In addition, to prevent the wind degree slab 2 from being floated, it is further fixed with an anti-floating key 18 which penetrates the lower portion from the upper end of the wind degree slab 2 and is fixed to the bracket 110.

Accordingly, one end of the wind degree slab 2 is filled with the mortar 16 in the bracket 110 so that the installed position can be maintained firmly even if the axial force acts toward both ends of the segmented wind degree slab 2.

5 to 7 are views for explaining the installation structure of a segmented wind duct slab in a tunnel according to a second embodiment of the present invention. In the second embodiment of the present invention, only the other parts are compared with the first embodiment described above. Description and the same parts are replaced by the description of the first embodiment.

As shown, in the second embodiment of the present invention, while facing the butt face 22 of the wind strength slab 2 with the eyebolt 4, the wind strength slab 2 is attached to the ceiling using the moon stand 20. It is structure to be suspended and supported.

The stand 20 is made of a circular ring so that one side end of the fixing bar 6 can be fitted, and the fixing bar 6 is attached to the eye bolt 4 provided on the butt surface of the wind degree slab 2 to be bound. When you put together the moon stand 20 together, you can tie it together.

The other end of the daldae 20 may be fixed to the upper surface of the tunnel 100. Due to such daldae 20, the wind degree slab 2 can maintain the installed state more firmly.

FIG. 8 is installed while continuously connecting the segmental wind tunnel slab 2 of the tunnel according to the present invention in the longitudinal direction along the tunnel 100, both side ends of the wind tunnel slab 2 are, for example, FIG. It may be made of a stepped surface corresponding to each other, or may be installed while connecting adjacent members in a fitting manner by forming grooves and protrusions corresponding to each other as shown in FIG. 8B.

In the above, the preferred embodiment of the present invention has been described for the purpose of illustration, but is not limited thereto. It is also possible to carry out various modifications within the scope of the claims and detailed description of the invention and the accompanying drawings.

2: Pungdo slab
4: Eye bolt
6: Fixed bar
8: Insert
10: Shear key groove
12, 16: Mortar
14: fireproof barrier
18: Flotation prevention key
20: Moon
22: Butt side
100: tunnel
110: bracket
200: hypothesis

Claims (11)

delete Divided into two, each one end is supported by a bracket formed along both sides of the tunnel lining, and the other end is a segmented wind-level slab installation structure of the tunnels that are joined against each other,
A segmented wind-level slab installation structure of an eyebolt formed on the butt surface of the wind-level slab, a fixed bar that binds each of the eye-bolts in a superposed state, and a tunnel fixed to the tunnel in a state bound to the fixed bar . The method according to claim 2,
Segmented wind blast slab installation structure of a tunnel, characterized in that inserts are respectively installed to prefabricately install eye bolts at the end of the butt surface of the wind blast slab. The method according to claim 3,
The insert is installed in a segmented wind tunnel slab structure, characterized in that made of a recessed shear key groove shape. The method according to claim 3,
The insert is installed eccentrically toward the bottom from the center of the end of the butt surface of the windshield slab, and the eyebolt is positioned downward and installed in a segmented windshield slab of a tunnel. The method according to claim 3,
A structure for installing a segmented wind blast slab in a tunnel, characterized in that a mortar is filled in a binding portion forming the butt surface of the wind blast slab. The method according to claim 3,
A structure for installing a segmented wind blast slab in a tunnel, characterized in that a fire resistant barrier that does not easily burn on fire is formed at a lower end of the binding portion forming the butt surface of the wind blast slab. The method according to claim 2,
The wind-level slab is installed in a segmented wind-level slab of a tunnel, characterized in that it is installed inclined upward from the part fixed to the bracket to the butt surface. The method according to claim 2,
The section fixed to the bracket of the wind degree slab is a segmented wind degree slab installation structure of a tunnel characterized in that it is further fixed with an anti-floating key to prevent the wind degree slab from being floated. The method according to claim 2,
The end portion fixed to the bracket of the wind degree slab is characterized in that the installation of the tunnel type wind tunnel slab, characterized in that fixed by mortar. The method according to claim 2,
The daldae is a segmented wind-proof slab installation structure of a tunnel, characterized in that one end is formed of a circular ring to bind to a fixed bar.

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