KR102166856B1 - Pre installation type bridge stairway fixing unit and method for constructing bridge stairway using this same - Google Patents

Abstract

The present invention relates to a pre-buried anchor fixing device and a method of bridge inspection facility construction and construction thereof. An objective of the present invention is to install (preinstall) an anchor fixing device for fixing a safety wire and a bridge inspection facility installed on a bridge with concrete construction of the bridge, and simply detach a portion blocking infiltration of concrete into a coupler, to which a bolt is fastened, and blocking an opening part of the coupler from the coupler immediately before installing the bolt to fasten the bolt. According to the present invention, the pre-buried anchor fixing device comprises: an inspection facility-side coupler (10) of a nut shape to which a bolt for fixing a bridge inspection facility is fastened; a reinforcing bar fixing part (20) using a reinforcing bar (2) arranged inside a form (1) for concrete deposition of a bridge as a support basis to fix the inspection facility-side coupler (10); and a cap (30) assembled on the front side of the inspection facility-side coupler to close an opening part of the inspection facility-side coupler to prevent concrete from infiltrating through the opening part and open a front opening part of the inspection facility-side coupler when fixing the inspection facility-side coupler by a bolt. The cap includes: a coupling unit (31) coupled to the circumference of the inspection facility-side coupler; and a detachable blocking unit (33) formed on the front side of the coupling unit to close the opening part of the inspection facility-side coupler, and detached from the coupling unit by an external force to open the opening part of the inspection facility-side coupler.

Description

Pre-installation anchor fixing device and its construction and bridge inspection facility construction method {PRE INSTALLATION TYPE BRIDGE STAIRWAY FIXING UNIT AND METHOD FOR CONSTRUCTING BRIDGE STAIRWAY USING THIS SAME}

The present invention relates to a pre-embedded (pre-installed) anchor fixing device, and more particularly, a pre-embedded anchor fixing device for installing an anchor fixing device for the installation of a bridge inspection facility and the concrete construction of the bridge, and its construction and bridge It is about the construction method of inspection facilities.

The present invention relates to a pre-embedded anchor fixing device for fixing a safety wire for preventing a fall accident of a worker moving along a bridge inspection facility and installing the pre-buried anchor fixing device and its construction and a bridge inspection facility construction method. About.

This part provides background information related to the content of the present application, and is not necessarily prior art.

In general, a bridge is installed on a bridge pier, which is a lower structure, and an upper structure is installed on the bridge.

On the other hand, bridges are subject to regular/irregular safety inspections for the bridge seating devices, and the bridge is equipped with a bridge inspection facility for safety diagnosis and inspection by workers.

The bridge inspection facility consists of an inspection path installed along the perimeter of the pier and an inspection stairway connecting the road surface of the slab and the inspection path, and bolts and anchor fixing devices (nut-type couplers, etc.) are usually installed on the pier and the slab. ) Through.

The fixing device is installed on a bridge (pier) and is divided into a pre-embedded (pre-installed) method that is installed along with the concrete construction of the pier according to the installation time, and a post-installed method that is installed after drilling a hole in the completed bridge.

As a patent document that can confirm the background technology of the present invention, Registration Patent No. 10-0782667 is a buried device buried in the coping portion of the pier to install the bridge safety inspection passage in the pier, and the exposed surface is spaced apart from each other to prevent separation. The first guide groove and the second guide groove are formed in the longitudinal direction, the first insertion groove and the second insertion groove are formed in the longitudinal direction by being spaced apart from each other on the buried surface, and the first and second guide grooves and the first , 2 Insertion grooves are inserted into the main body separated from each other by the connection part, and the first and second guide grooves of the main body are magnetically attached to the main body to the steel formwork for pouring concrete piers and removed after the main body is buried. It is an embedding device for fixing the bridge safety inspection passage including a plurality of magnets, and first and second anchorages respectively inserted into the first and second insertion grooves of the main body to fix the main body to the bridge pier concrete. Nut type fixing devices cannot be used.

Patent Publication No. 10-2006-0016371 is a well-known thing for fixing and installing an inspection facility on a pier and having a railing, a scaffolding, and a fixing stand for inspecting a pier. It is installed around the inner periphery of the top of the pier. Consisting of a plurality of nut portions to which are fixed and an extension portion extending from the nut portion to the inside of the pier, it is a buried nut for fixing the bridge inspection facility that is placed in concrete integrally with the pier, and the nut is fixed to the reinforcing bar, but the nut Since the open end of the part is directly attached to the formwork, there is no separate sealing technology, so it cannot prevent the concrete from penetrating, and eventually, there is a problem that the concrete blockage of the nut part is caused.

On the other hand, if a worker performs safety inspection while moving along the bridge inspection facility, a fall accident may occur due to the worker's carelessness.To prevent this safety accident, a safety wire is installed along the bridge inspection facility and the worker's work clothes, etc. A fixed safety hook is connected to the safety wire to protect the worker, but the safety wire cannot be safely installed, and the effect of preventing accidents is inferior.

Registered Patent No. 10-0782667 Publication Patent No. 10-2006-0016371

The present invention is to solve the above-described problem, the bridge inspection facility installed on the bridge and the anchor fixing device for fixing the safety wire are installed (pre-installed) together with the concrete construction of the bridge, and the bolt is fastened in the coupler. The purpose is to provide a pre-embedded anchor fixing device that prevents concrete from penetrating and the part that was blocking the opening of the coupler from the coupler and fastens the bolt by simply dropping it out of the coupler immediately before installation of the bolt, and its construction and the construction method of the bridge inspection facility. There is this.

The pre-embedded anchor fixing device according to the present invention includes a nut-type inspection facility-side coupler to which an anchor for fixing a bridge inspection facility is fastened; A reinforcing bar fixture for fixing the coupler on the inspection facility side based on a reinforcing bar that is reinforced inside a formwork for pouring concrete of a bridge; The cap is assembled in front of the inspection facility-side coupler to prevent concrete from penetrating through the open part of the inspection facility-side coupler, while a cap that opens the front opening of the inspection facility-side coupler when fixing the bridge inspection facility with bolts. Including, the cap is a tubular coupling portion coupled to the circumference of the inspection facility-side coupler, formed in front of the coupling portion to close the open portion of the inspection facility-side coupler, and detached from the coupling portion by an external force for the inspection It characterized in that it comprises a drop-off type blocking portion to open the opening of the facility side coupler.

The pre-embedded anchor fixing device according to the present invention is a nut-type safety wire-side coupler to which an eye bolt for installation of a safety wire wired along the bridge inspection facility is fastened in order to prevent a fall of a worker moving along a bridge inspection facility. Wow; A reinforcing bar fixture for fixing the safety wire-side coupler based on a reinforcing bar laid inside a formwork for placing a concrete in a bridge; A cap that is assembled in front of the safety wire-side coupler and closes the concrete from penetrating through the opening of the safety wire-side coupler and opens the front opening of the safety wire-side coupler when the eyebolt is fastened, The cap is a tubular coupling portion coupled to the circumference of the safety wire side coupler, formed in front of the coupling portion to close the opening of the safety wire side coupler, and detached from the coupling portion by an external force to the safety wire side coupler It characterized in that it comprises a drop-off type blocking portion to open the opening of the.

According to the pre-embedded anchor fixing device and its construction and the bridge inspection facility construction method according to the present invention, a coupler that fixes the bolt for the installation of the bridge inspection facility and the safety wire on the bridge is fixed together with the concrete construction of the bridge, and in particular, a bolt type The coupler is firmly installed in the optimal position as the fixing position with the reinforcing bar can be freely changed through the reinforcing bar fixture of the rebar. In addition, the entrance of the coupler is blocked with a cap to fundamentally block the penetration of concrete. It is effective to install the bridge inspection facility and safety wire easily and firmly by simply removing the phosphorus-off type blocker and installing the bolt.

In addition, the sealing effect of the coupler is excellent as the cap is elastically supported by the coil spring and adhered to the formwork. Even if the formwork is opened by the pressure of concrete, the cap moves along the formwork by the elasticity of the coil spring to maintain close contact and fall off. When removing the type blockage, the coil spring helps the detachable blockage part to be removed, making it easy to remove, and since no pieces of the blocking part remain at the entrance of the coupler, it has the effect of helping the smooth fastening of the bolt.

1 is a perspective view of a pre-embedded anchor fixing device according to a first embodiment of the present invention.
Figure 2 is a side view of the pre-embedded anchor fixing device according to the first embodiment of the present invention.
3 to 5 are construction and installation process diagrams of the bridge inspection facility of the pre-embedded anchor fixing device according to the first embodiment of the present invention.
6 is a view showing the lock nut applied to the pre-embedded anchor fixing device according to the first embodiment of the present invention.
7 is a perspective view of a pre-embedded anchor fixing device according to a second embodiment of the present invention.
8 is a view showing an example of installing a safety wire using the pre-embedded anchor fixing device according to the second embodiment of the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

<Example 1>

As shown in FIGS. 1 and 2, the pre-embedded anchor fixing device 100 according to the present invention is a nut-type inspection facility side coupler 10 that is installed before concrete pouring of a bridge and a bolt fixing the bridge inspection facility is fastened. ), bolt-type reinforcement fixture (20) for fixing the coupler (10) on the inspection facility side, a cap (30) that seals the front opening of the coupler on the inspection facility (10) and adheres to the formwork, for fixing the bridge inspection facility It is composed of a base plate 40 for using a plurality of inspection facility-side couplers 10 according to the number of bolts (shown as an example), and the cap 30 is formed by demolding the formwork by curing of concrete. After the inspection facility side coupler 10 is configured to open the front of the inspection facility side coupler 10 so that a bolt fixing the bridge inspection facility can be fastened.

The inspection facility side coupler (10) is in the form of a nut with a screw wire formed on the inner circumferential surface, and is formed in various ways such as round and square. In this case, the inside is a structure in which both sides in the longitudinal direction penetrate the outside and the inside communicates as a whole. Accordingly, the reinforcement fixture 20 can adjust the elastic force of the coil spring for elastically supporting the cap 30.

The four inspection facility-side couplers 10 are fixed to protrude to both front and rear sides of the base plate 40, and are fixed by welding after passing through the holes 41 formed in the base plate 40, and the base plate 40 The reinforcing bar fixture 20 is fastened to the part protruding backward based on the reference, and the cap 30 is assembled at the end of the protruding part.

As shown in Fig. 6, the inspection facility side coupler 10 may have a threaded wire formed on the outer circumferential surface and a lock nut 11 may be fastened. The lock nut 11 is located at the rear of the cap 30 after the position of the cap 30 is determined to prevent the cap 30 from being pushed back, thereby preventing the cap 30 from being pushed into the surface of the concrete and being buried. It has the effect of exposing it to the surface of concrete.

The base plate 40 is provided with one or more holes penetrating back and forth in order to reduce weight and increase burial strength due to the filling of concrete.

The reinforcing bar fixture 20 is a bolt having a screw wire formed on the outer circumferential surface, and is screwed and fixed at the rear side of the coupler 10 on the inspection facility side, and itself is fixed to the reinforcing bar reinforced in the bridge by welding or wire.

As described above, the reinforcement fixture 20 functions to fix the inspection facility-side coupler 10 to the reinforcing bar before pouring concrete, and controls the elastic force of the coil spring that elastically supports the cap 30. In this way, the reinforcing bar fixture 20 is coupled to the rear opening of the inspection facility-side coupler 10 to seal the rear opening to naturally prevent the penetration of concrete.

The cap 30 is fitted to the front end of the inspection facility-side coupler 10 to prevent concrete from penetrating through the front opening of the inspection facility-side coupler 10, and in particular, between the distal end of the inspection facility-side coupler 10 and the formwork. In order to seal the front opening of the inspection facility-side coupler (10) even if a gap occurs, the inspection facility-side coupler (10) has a size that can be moved back and forth, and as an elastic member, the coil spring (50) is closely attached to the formwork. It is composed of

Preferably, the cap 30 is a tubular coupling portion 31 coupled to the circumference of the inspection facility side coupler 10, a friction reducing protrusion 32 formed on the inner circumferential surface of the coupling portion 31, and a coupling portion 31 It is formed in a form that blocks the front of the inspection facility side of the coupler 10 is composed of a blocking portion 33 that blocks the front opening.

The coupling portion 31 has an inner diameter of a size that can slide along the circumference of the coupler 10 on the inspection facility side, and the concrete does not penetrate between them 10 and 31.

An outward flange may be added to the front end of the coupling part 31. The flange is formed outwardly on the coupling part 31 so as to be in contact with the formwork over a large area, and is selected as necessary.

A magnet may be configured on the coupling part 31 or the flange. The magnet is formed in a ring shape, for example, and is coupled to the coupling portion 31 or the peripheral portion of the flange.

The friction reducing protrusion 32 is for reducing frictional resistance by preventing the entire surface of the coupling portion 31 from contacting the coupler 10, and various shapes such as a hemispherical shape and a ring shape are possible.

The blocking part 33 is removed so that the bolt for fixing the bridge inspection facility can be fastened to the inspection facility-side coupler 10 after curing of the concrete, preferably by the blow of a tool (hammer, etc.) carried by the operator at all times. It is configured to be removed from the coupling portion 31, for example, the circumferential portion is integrally connected to the coupling portion 31 through the breaking guide portion 34.

The breaking guide portion 34 is formed in a circumferential direction around the blocking portion 33 to have a thickness thinner than that of the blocking portion 33. Since the breaking guide portion 34 has a low strength through a thin thickness, it is cut when the tool strikes, so that the blocking portion 33 falls.

Since the breaking guide portion 34 of this type has a notch shape, it can be checked at a glance from the outside.

The cap 30 must be manufactured so that the detachable blocking portion 33 can be easily detached, and is preferably manufactured by injection molding made of a synthetic resin material.

The coil spring 50 elastically supports the cap 30 so that it is in close contact with the formwork, so that the cap 30 is exposed to the outside without being buried in concrete when the formwork is demolded. In addition, the blocking portion 33 of the cap 30 When removing the blocking part 33 by supporting it, it helps to fall out of the blocking part 33 through elastic force.

The construction method of the pre-embedded anchor fixing device according to this embodiment is as follows.

1. Installation of pre-embedded anchor fixing device (see Fig. 3).

For the construction of the bridge (coping part), the formwork (1) is installed and the reinforcing bar (2) is laid in the formwork (1).

In this process, the pre-embedded anchor fixing device 100 according to the present embodiment is installed in the concrete pouring space inside the formwork 1, and specifically described, holding the position of the coupler 10 and forming the cap 30 After making close contact with the pouring surface of 1), fix the reinforcing bar fixture (20) to the reinforcing bar (2). Since the rebar fixture 20 is screwed to the coupler 10, if the position does not match with the rebar (2), the rebar fixture (20) is inserted into the coupler (10) or withdrawn to the rebar (2). It is possible to fix it firmly.

At this time, the reinforcing bar fixture 20 is different from the initial assembly position, but the coil spring 50 makes the cap 30 in close contact with the casting surface of the formwork 1 through elastic force.

When the lock nut 11 is applied, the lock nut 11 is separated from the rear of the cap 30, and after the position of the cap 30 is determined, it moves to the rear of the cap 30 to support the cap 30.

2. Install the bridge inspection facility after demoulding the formwork.

end. Removal of the cap block (see Fig. 4).

After the concrete is cured, the formwork (1) is demolded. In this case, the concrete surface of the pier is exposed to the outside and the cap 30 applied in this embodiment is exposed.

The blocking portion 33 and the breaking guide portion 34 are visible on the exposed surface of the cap 30, and when hitting the blocking portion 33 of the cap 30 using a tool such as a hammer, the breaking guide portion 34 Is broken and the blocking portion 33 is converted to a free state and is removed from the cap 30. In addition, the blocking part 33 is in a state supported by the elastic force of the coil spring 50, and when the blocking part 33 is converted to a free state, it is removed from the cap 30 more quickly by the elastic force of the coil spring 50. By inducing the breaking guide part 34 to break along the shape of the manufacturing state, it is possible to break in a true circle shape.

After the blocking part 33 is removed, the coil spring 50 is removed from the coupler 10.

I. Bolted bridge inspection facility (see Fig. 5).

The fastening hole of the fixing bracket 210 of the bridge inspection facility 200 is matched with the coupler 10 and the bolt 220 is fastened to the coupler 10 to install the bridge inspection facility.

<Example 2>

The pre-embedded anchor fixing device 100 according to the present embodiment includes a configuration in which a safety wire through which an operator moving along a bridge inspection facility can hang a safety hook (eg, a carabiner) is installed. There is a difference.

As shown in FIG. 7, this embodiment includes a safety wire-side coupler 60 and a reinforcing bar fixture 61, a cap 62, and a coil spring 63 related thereto in the first embodiment.

The safety wire-side coupler 60 has the same structure as the inspection facility-side coupler 10 and is installed on the base plate 40 through the same method, and its position is preferably the uppermost center of the base plate 40.

The reinforcing bar fasteners 61, the cap 62, and the coil spring 63 attached to the safety wire-side coupler 60 are rebar fasteners 20 and caps attached to the inspection facility-side coupler 10 described in Example 1. 30), the same configuration as the coil spring 50, that is, the cap 62 is composed of a tubular coupling portion, a friction-reducing protrusion, and a detachable blocking portion connected to a fracture guide portion.

In addition, the construction and safety wire installation method of this embodiment is to fix the formwork of the safety wire-side coupler 60-Remove the formwork by curing concrete-Remove the detachable blockage of the cap 62 (removed by hitting the tool)-Eye bolt type Bolt 300 installation-It consists of the process of installing the safety wire 310.

The present invention is a pre-embedded anchor fixing device, and therefore, in the drawings, the safety wire side coupler 60 and the inspection facility side coupler 10 are shown to be together on the base plate 40, but are not limited thereto, and the safety wire side The coupler 60 may be implemented separately from the coupler 10 on the inspection facility side. In this case, since the safety wire-side coupler 60 can be fixed and used only with the reinforcement fixture 61, it includes not using a base plate.

1: formwork, 2: rebar
10: inspection facility side coupler, 20,61: rebar fixture
30,62: cap, 31: coupling part
32: friction reduction protrusion, 33: drop-off type blocking part
34: fracture guide, 40: base plate
50,63: coil spring,

Claims (12)

A nut-type inspection facility-side coupler 10 through which bolts for fixing the bridge inspection facility are fastened and both sides in the longitudinal direction pass through;
A bolt-type reinforcement fixture (20) for fixing the coupler on the inspection facility side based on the reinforcing bar (2) reinforced inside the formwork (1) for concrete pouring of the bridge;
A cap that is assembled in front of the inspection facility-side coupler and closes the concrete from penetrating through the opening of the inspection facility-side coupler, and opens the front opening of the inspection facility-side coupler when the bridge inspection facility is fixed with bolts ( 30) and;
It is inserted into the interior of the inspection facility side coupler and includes an elastic member for intimate contact with the cap,
The cap is a tubular coupling portion 31 coupled to the circumference of the inspection facility side coupler, formed in front of the coupling portion to close the opening portion of the inspection facility side coupler, and detached from the coupling portion by an external force for the inspection. It includes a drop-off type blocking portion 33 to open the opening of the facility-side coupler,
The elastic member is a pre-embedded anchor fixing device, characterized in that the elastic force is adjusted by the reinforcing bar fastener, and by supporting the reinforcing bar fastener as a support base to elastically support the detachable blocking part of the cap, thereby helping the detachable blocking part fall out. The pre-embedded anchor fixing device according to claim 1, wherein the detachable blocking part is connected to the coupling part through a breaking guide part having a thin thickness along a circumferential direction of the circumferential part. delete delete The pre-embedded anchor fixing device according to claim 1 or 2, wherein the inspection facility-side coupler comprises a base plate that is coupled while being spaced apart from each other at a certain interval. The method according to claim 1 or 2, wherein the inspection facility-side coupler includes a screw wire on an outer circumferential surface, and a lock nut that is screwed to the screw wire to maintain a state in close contact with the form without pushing the cap. Pre-filled anchor fixing device. The pre-embedded anchor fixing device according to claim 5, comprising a magnet installed on the cap and magnetically attached to the formwork. The pre-embedded anchor fixing device according to claim 1, comprising a friction reducing protrusion protruding from an inner circumferential surface of the cap and supported by a coupler on the inspection facility side. The method according to claim 5, and a safety wire side coupler fixed to the base plate; The safety wire-side coupler is assembled in front of the safety wire-side coupler and closes the concrete to prevent penetration through the opening of the safety-wire-side coupler, while the safety wire-side coupler is opened in the front when the eyebolt for the safety wire is fixed to the safety wire-side coupler. Includes a safety wire side cap to open the part
The safety wire-side cap is a tubular coupling portion coupled to the circumference of the safety wire-side coupler, formed in front of the coupling portion to close the opening portion of the safety wire-side coupler, and detached from the coupling portion by an external force to the safety Pre-embedded anchor fixing device, characterized in that it comprises a detachable blocking portion for opening the opening of the wire-side coupler. A nut-type safety wire-side coupler to which an eye bolt for installing a safety wire wired along the bridge inspection facility is fastened to prevent a fall of a worker moving along the bridge inspection facility;
A reinforcing bar fixture for fixing the safety wire-side coupler based on a reinforcing bar laid inside a formwork for placing a concrete in a bridge;
A cap that is assembled in front of the safety wire-side coupler and closes the concrete from penetrating through the opening of the safety wire-side coupler and opens the front opening of the safety wire-side coupler when the eyebolt is fastened,
The cap is a tubular coupling portion coupled to the circumference of the safety wire side coupler, formed in front of the coupling portion to close the opening of the safety wire side coupler, and detached from the coupling portion by an external force to the safety wire side coupler Pre-embedded anchor fixing device, characterized in that it comprises a detachable blocking portion for opening the opening of the. The pre-embedded anchor fixing device according to claim 1 is placed inside the formwork for the construction of the bridge inspection facility, and the pre-embedded anchor fixing device is attached to the reinforcing bar inside the form so that the cap of the pre-embedded anchor fixing device is in close contact with the formwork. A first step of fixing;
A second step of opening the interior of the inspection facility side coupler by removing the detachable blocking portion of the cap configured in the pre-embedded anchor fixing device after the concrete is cured and the formwork is demolded;
And a third step of constructing a bridge inspection facility by fastening a bolt for fixing a bridge inspection facility to the coupler on the inspection facility side. A first step of arranging the pre-embedded anchor fixing device according to claim 10 inside a formwork and fixing the pre-embedded anchor fixing device to the reinforcing bar inside the formwork so that the cap of the pre-embedded anchor fixing device is in close contact with the formwork;
A second step of opening the inside of the safety wire side coupler by removing the detachable blocking part of the cap configured in the pre-embedded anchor fixing device after the concrete is cured and the formwork is demolded;
And a third step of fastening an eye bolt for installing a safety wire to the safety wire side coupler and installing a safety wire to the eye bolt.

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