JPH094394A - Reinforcing bar hanging metal for tunnel - Google Patents

Abstract

PURPOSE: To provide a reinforcing bar hanging metal for a tunnel capable of being easily fitted to the primary lining without boring a hole on a waterproof sheet when the waterproof sheet is stuck on the surface of the primary lining and the secondary lining is formed on it with reinforced concrete. CONSTITUTION: This reinforcing bar hanging metal is constituted of a base metal 1 bent with both sides of a metal rectangular plate inward to form a lock section 11 and having a C-shaped cross section, a hinge-like hook member vertically erected with action rods 24, 25 opening or closing hinge pieces 22, 23 on one-side faces of the hinge pieces 22, 23 in the size that two hinge pieces 22, 23 are hooked on the lock section 11 of the base metal 1 together with a waterproof sheet 4 when the hinge pieces 22, 23 are opened, and a fixing ring. The base metal 1 is fixed by welding to the surface of the tunnel primary lining 5 and the surface of the timbering 6 on the same plane, the hinge-like lock member is inserted into the base metal 1 together with the waterproof sheet 4 while the hinge pieces 22, 23 are half-opened or closed, the hinge pieces 22, 23 are locked on the base metal 1, and the fixing ring is inserted to two action rods 24, 25 to fix them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging reinforcing bar metal fitting useful for tunnel construction in which a waterproof sheet is attached to a primary lining and then a secondary lining of a reinforcing bar concrete is formed. is there.

In constructing a tunnel, in order to make the completed tunnel waterproof, a waterproof sheet is often attached to the surface of the primary lining and then a secondary lining is often constructed. When constructing the secondary lining, it is often the case that the secondary lining is formed of a reinforcing bar concrete.

When the secondary lining is formed by the reinforcing bar concrete, the reinforcing bar suspension fittings for fixing the reinforcing bars must be attached to the surface of the primary lining, but the primary lining has a waterproof sheet. In order to prevent the water resistance from being impaired when the secondary lining is formed with a reinforcing bar concrete,
Consideration is needed.

In such a case, various methods have been conventionally adopted, and in general, a hole is formed in the waterproof sheet so that the hanging reinforcing bar metal fitting is projected from the waterproof sheet. Although a seal material such as a waterproof rubber is interposed to prevent water leakage, it is still difficult to completely prevent water leakage.

Therefore, a method has been considered in which the waterproof sheet is clamped and fixed by a clip-shaped member having reinforcing bars attached thereto.
This method has high reliability in waterproofing because it does not form holes in the waterproof sheet, but it cannot be fixed unless the sheet is sufficiently loosened when the waterproof sheet is extended, See
There is a risk of kinking due to
There is a problem that a great amount of labor is required for the work of picking up the tray.

[0006]

SUMMARY OF THE INVENTION In view of the above prior art, the present invention has a waterproof sheet attached to the surface of the primary lining, and a secondary lining on the surface thereof with a reinforcing bar concrete. It is an object of the present invention to provide a reinforcing rod suspension fitting for a tunnel that can be easily attached to a primary lining and used by a simple work without forming a hole in a waterproof sheet when forming. is there.

[0007]

In order to solve the above-mentioned problems, the structure of the reinforcing bar hanging metal fitting for a tunnel according to the present invention is such that both sides of a metal square plate are bent inward to form locking portions. A base metal fitting having a C-shaped cross section and two hinge pieces, which are sized to be locked together with a waterproof sheet in the locking portion of the base metal fitting when they are flattened, are attached to one side surface of each hinge piece. A hinge-shaped locking member having a vertically operating lever for opening and closing the hinge piece, and a fixing ring for fixing the two operating rods when the hinge piece of the hinge-shaped locking member is flattened. The base metal fitting was fixed by welding or the like to the supporting surface on the same or substantially the same surface as the primary lining surface of the tunnel, and the hinge-like locking member was half-opened or closed on the base metal fitting. In this state, insert the hinge piece together with the waterproof sheet and open it to engage the hinge piece with the base metal fitting. And, it is characterized in that so as to fix them operating rod the locking ring fitted on the operating rod of the two.

[0008]

In the tunnel reinforcing bar hanging metal fitting of the present invention, the base metal fitting is fixed to the support of the primary lining, and the hinge-like locking member is used together with the waterproof sheet to make the hinge piece half open or closed. When the hinge piece is flattened by closing the operating rod inward after inserting it into the metal fitting, the flattening of the hinge piece causes the locking member to be integrated with the waterproof sheet to lock the base metal fitting. Is locked to the
Since the two operating rods are parallel to each other, in this state, if the operating rods are fixed by fitting the fixing rings on the operating rods, the hinge pieces do not operate in the half-open or closed direction, and the base does not move. Since it is fixed to the metal fittings, without making holes in the waterproof sheet,
Moreover, the sheet can be fixedly supported by an extremely easy operation.
Further, the two operating rods can easily fix the reinforcing bar for forming the secondary lining by the reinforcing bar concrete.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an example of a reinforcing bar hanging metal fitting for a tunnel according to the present invention, and FIG. 2 is a plan sectional view of the reinforcing bar hanging metal fitting of FIG. 1 attached to a supporting structure with a waterproof sheet interposed.

In the figure, 1 is the primary lining 5 of the tunnel.
Base plates are secured to the supporting member 6 by welding or the like, and both sides of the square plate are bent inward to form locking portions 11.

Reference numeral 2 denotes two hinge pieces 22 and 23 hinged to a shaft 21.
An operating rod for opening and closing the hinge pieces 22, 23 on one side
24, 25 is a hinge-like locking member that is erected vertically, and the operating rod 24, 25
When 25 is opened outward, the hinge pieces 22 and 23 are in a half-open or closed state. Conversely, when the operating rods 24 and 25 are closed, the hinge pieces 22 and 23 are flattened and the operating rods 24 and 25 are in a parallel state. Is formed in.

Reference numeral 3 denotes a fixing ring which is fitted and fixed on the operating rods 24 and 25 which are in a parallel state, and which constitutes one example of the reinforcing rod suspending metal fitting for a tunnel according to the present invention. In the figure, 4 is a waterproof sheet to be attached to the primary lining 5 of the tunnel. Further, the operating rods 24 and 25 of the locking member 2 are formed with bent ends 26 and 27 at their ends, which is the waterproof sheet 4.
The purpose of this is to make it easier to support the reinforcing bar for the secondary lining after being attached to the primary lining 5, and to prevent the fixing ring 3 from coming off after the fixing ring 3 is fitted. Whether or not the bent portions 26 and 27 are formed is arbitrary.

To attach the waterproof sheet 4 to the surface of the primary lining 5, the base metal fitting 1 is fixed to the support 6 by welding or the like, and the base metal fitting 1 is attached. As shown in FIG. 1, the hinge-like locking member 2 in the state shown in FIG. 1 is operated by operating the operating rods 24 and 25 so that the hinge pieces 22 and 23 are located between the locking portions 11 and 11 of the base metal fitting 1. Half-opened state so that it can be inserted freely, and in this state, the waterproof sheet 6 is interposed between the hinge pieces 22 and 23 and the base metal fitting 1, and the waterproof sheet 6 is operated by the operating rods 24 and 25. After pressing the hinge pieces 22 and 23 together with the waterproof sheet into the base metal fitting 1 and then closing the operating rods 24 and 25, the hinge pieces 22 and 23 are flattened and their outer ends are opened. Since the waterproofing sheet 4 is integrally locked to the locking portion 11 of the base metal fitting 1 and the operating rods 24 and 25 are in a parallel state, the fixing ring 3 is fixed to the operating rods 24 and 25 in this state. If fitted and fixed, the hinge pieces 22, 23 Is kept flat, and the locking member 2 is firmly fixed to the base metal fitting 1. Therefore, by continuously performing the above work, the waterproof sheet 4 can be attached to the primary lining 5 of the tunnel without making a hole in the waterproof sheet 4, and the conventional waterproof sheet can be attached. The work can be performed extremely easily as compared with the sticking work.

After the waterproof sheet 4 has been attached to the primary lining 5 by the above-mentioned procedure, the rebar for the secondary lining is fixed to the operating rods 24 and 25, and the concrete is placed. , A reinforcing bar concrete with a waterproof sheet 4 interposed on the primary lining 5.
The secondary tunnel lining can be formed, and since the waterproof sheet 6 has no holes as described above, the completed tunnel is extremely waterproof.

[0015]

The present invention is as described above, and a base metal fitting is fixed to the support of the primary lining of the tunnel by welding or the like, and a hinge-like locking member is attached to the hinge of the base metal fitting. After half-opening or closing the pieces and inserting with supporting waterproof sheet between them, close the operating rod and open the hinge pieces, and integrate the ends of the hinge pieces with the waterproof sheet. Since it is locked to the locking part of the base metal fittings, not only can the waterproof sheet be attached to the surface of the primary lining by simple work, but it is also possible to avoid making holes in the waterproof sheet. Therefore, the waterproof property of the tunnel after forming the tunnel by applying the secondary lining becomes extremely good.

[Brief description of drawings]

FIG. 1 is a plan view of an example of a reinforcing bar suspension fitting for a tunnel according to the present invention.

FIG. 2 is a plan view showing a state where the waterproof sheet is attached to the support work.

[Explanation of symbols]

 1 Base metal fitting 11 Locking part 2 Hinge-shaped locking member 21 Shaft 22,23 Hinge piece 24,25 Operating rod 3 Ring for fixing operating rod 4 Waterproof sheet 5 Primary lining 6 Supporting work

Claims (1)

[Claims] 1. A base metal member having a C-shaped cross section, in which both sides of a metal square plate are bent inward to form a locking portion, and two hinge pieces are provided on the base metal member at the time of flattening. A hinge-like locking member that is vertically erected on one side surface of each hinge piece for opening and closing the hinge pieces and has a size that can be locked together with the waterproof sheet in the locking portion, and the hinge-shaped engaging member. When the hinge piece of the stop member is flattened, the above 2
It consists of a fixing ring for fixing the operating rod of the book, and the base metal fitting is fixed by welding or the like on the supporting surface of the same or substantially the same surface as the primary lining surface of the tunnel, and the base metal The hinge-like locking member is inserted and flattened together with the waterproof sheet in a state where the hinge piece is half-opened or closed, so that the hinge piece is locked to the base metal fitting and the two operating rods are locked. A reinforcing rod suspension fitting for a tunnel, characterized in that a fixing ring is fitted to fix the operating rods.