JPH09316829A - Floor plate removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and safely peel a floor plate from a main beam. SOLUTION: On one end side of a pair of beam parts 12 of which one end part side and the other end part side are connected to a connection member 13, an installation member 15 to be installed on a floor plate 2 is rotatably connected, and at the other end side, a lock member 18 to which a wire Y of a crane can be locked is provided. A suspension bolt 22 to be inserted into a through hole preliminarily formed in the floor plate 2 and locked by a washer and a nut on the lower surface side is rotatably connected to a middle part of the beam part 12. An installation member 15 is installed on a floor plate block 2a adjacent to the floor plate block 2a to be removed, the suspension bolt 22 is inserted into the through hole 24 in the floor plate block 2a to be removed to be locked on the lower surface side, the wire Y is locked to a lock member 18 at the other end of the beam part 12, the other end part of the beam part 12 is suspended through the wire Y by the crane, and the floor plate block 2a is suspended upward by the suspension bolt 22 about an installation part as a support point to be removed from a main beam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor slab removing device used when replacing a damaged or aged floor slab.

[0002]

2. Description of the Related Art When replacing a concrete floor slab constituting a road bridge due to deterioration, it is necessary to remove the deteriorated floor slab from the main girder and remove it. Conventionally,
As a technique for peeling a floor slab that is firmly joined to and supported by a main girder by a dowel or the like, a construction method using a removing device 1 shown in FIG. 8 is known. In this peeling method, first, the floor slab 2 installed on the main girder is cut in the width direction at intervals in the bridge axis direction to form a plurality of floor slab blocks 2a, and the floor slab blocks 2a are straddled. The installation portion 3 of the removal device 1 is placed on the floor slab blocks 2a before and after in the bridge axis direction, the beam portion 4 is hung over the floor slab block 2a, and then the floor slab block 2a is preliminarily attached. The lifting bolts 5 are passed through the through holes formed in the thickness direction, and the lower ends of the lifting bolts 5 are locked to the lower surface of the floor slab block 2a by nuts or the like and are supported by the beam portion 4. In this state, The hydraulic jacks 6 installed on the floor slab blocks 2a before and after the floor slab blocks 2a to be peeled off are extended to lift the floor slab blocks 2a and separate them from the main girder.

[0003]

By the way, the removal device 1 is provided with jacks 6 at both ends of the beam 4,
Since the beam 4 is directly lifted by the extension force of the jacks 6 and the floor slab block 2a is lifted through the lifting bolts 5 locked to the beam 4, a large jack 6 that generates a large force is generated. However, there is a problem in that not only is it extremely expensive, but it also leads to an increase in weight, poor handling, and an apparatus that does not allow efficient construction work.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a floor slab removal device that can be handled extremely easily and that can reduce the cost of the device itself. .

[0005]

In order to achieve the above object, the floor slab removal device according to claim 1 is a concrete floor slab installed on a main girder constituting a road bridge or the like. A floor slab removal device for separating a floor slab block formed by blocking the floor slab from the main girder when the floor slab is removed by cutting it at intervals in the direction to form a block, and one end of the floor slab is removed. The installation part is installed on the floor slab adjacent to the block, and the other end is extended to the upper side of the floor slab block to be removed, and the lifting member attached to the floor slab is connected to the intermediate part. It is characterized in that it has a beam portion, and the floor slab block is lifted via the lifting member by applying an upward force to the other end of the beam portion.

In the floor slab removal device according to the second aspect, concrete floor slabs installed on the main girders constituting a road bridge or the like are removed by cutting them at intervals in the axial direction of the bridge to form blocks. At this time, a floor slab removing device for separating a floor slab block formed by blocking the floor slab from the main girder, wherein one end of the floor slab adjacent to the floor slab is sandwiched with the floor slab block being removed. And a pair of beam portions which are connection portions whose intermediate portions are rotatably connected to each other, and between the installation portion and the connection portion of these beam portions, A lifting member attached to the floor slab is connected to the other end of the beam portion, and a force is applied to each of the other ends of the beam portion in an upward direction or in a direction approaching each other, whereby the floor slab block is moved through the lifting member. Characterized by lifting To have. The floor slab removal apparatus according to claim 3 is the floor slab removal apparatus according to claim 2, wherein the other end of the beam portion has a connection beam portion in which an intermediate portion is rotatably connected to each other. One end is rotatably connected, and the floor slab block is hoisted via the hoisting member by applying a force to the other end of the connecting beam part in a direction upward or close to each other. There is.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a floor slab removal apparatus of the present invention will be described below with reference to the drawings. First, the floor slab removal apparatus according to the first embodiment will be described with reference to FIGS. 1 to 3. In the figure, reference numeral 11 is a removal device. The removing device 11 has a pair of beam portions 12, and one end portion side and the other end portion side of the beam portions 12 are the connecting member 1.
3 are connected and integrated. The beam portion 12 is
It is composed of a pair of beam members 14 having a U-shaped cross section, and an installation member 15 is rotatably attached to one end portion thereof. The installation member 15 includes an installation plate portion 15 a that is installed in contact with the upper surface of the floor slab 2 and an installation plate portion 15 a.
a connecting plate portion 15b that is erected on a. The connecting plate portion 15b is arranged between the beam members 14, and the beam member 14 and the connecting plate portion 15b are pins 16a. It is rotatably connected by.

Further, the other end of the beam member 14 is provided with a locking member 18 in which a locking hole 17 is formed, and the wire Y is inserted into the locking hole 17 of these locking members 18.
Is inserted and locked. In addition, a lifting bolt (lifting member) 22 whose one end is a bolt portion 21 having an external thread is provided at an intermediate portion of these beam portions 12.
Is provided, and the other end of each lifting bolt 22 is rotatably connected between the beam members 14 by a pin 23. These lifting bolts 22
Is inserted from above into a through hole 24 formed in the floor slab block 2a in the thickness direction in advance. When the through hole 24 is inserted, the washer 2 is inserted from the lower surface side of the floor slab block 2a.
By tightening the nut 26 via 5, the bottom surface of the floor slab block 2a is locked.

Next, a method of removing the floor slab by the removing device 11 having the above structure will be described. (1) First, the floor slab 2 to be peeled is cut into a block-shaped floor slab block 2a by inclining in the removal direction (the direction of arrow a in FIG. 2) with a cutter at intervals in the bridge axis direction. . (2) Then, the installation member 15 of the removal device 11 is installed along the cutting direction on the floor slab 2a on the front side in the removal direction of the floor slab 2a to be separated from the main girder. (3) Next, the lifting bolt 22 connected to the middle of the beam portion 12 of the removing device 11 is previously attached to the floor block 2a.
Through the through hole 24 formed in the thickness direction of
The washers 25 are attached to the bolts 21 formed at the respective tip portions from the lower surface side of the floor slab block 2a, and the nuts 26 are
Bolts 21 of these lifting bolts 22
Is locked to the lower surface of the floor slab block 2a. (4) In this state, the wire Y is inserted into the locking hole 17 of the locking member 18 provided at the other end of the beam portion 12 of the removing device 11 and locked, and the wire Y is hooked by the hook F of the crane. To be locked.

(5) After the removal device 11 is installed on the floor slab 2a as described above, the other end of the beam portion 12 of the removal device 11 is lifted upward by the crane via the wire Y. By doing so, as shown in FIG. 4, the beam portion 12 is rotated about the center axis of rotation with the installation member 15, whereby the installation bolt 15 is used as a fulcrum.
Are lifted up, the floor slab block 2a is pulled up, and separated from the main girder so as to rotate around the rear side in the separation direction. At this time, floor block 2
Since the cutting planes of a are inclined to the front side in the peeling direction (the direction of arrow a in FIG. 2), the cutting planes of the two sides are not buffered with the floor slab block 2a on the front side in the peeling direction to obtain a reaction force. It can be separated. (6) Then, when the floor slab block 2a is peeled off from the main girder as described above, once an intervening material is interposed in the gap between the floor slab block 2a and the main girder, lifting by the crane is released, and The slab block 2a is lowered and installed with a gap between it and the main girder.

(7) Next, the removal device 11 attached to the floor slab block 2a is removed, and the above work is sequentially performed for each floor slab block 2a on the front side in the peeling direction (direction of arrow A in FIG. 2). , Each floor slab block 2a
Is peeled from the main girder. (8) After all the floor slab blocks 2a to be stripped are stripped from the main girder, they are lifted by a crane from the gap formed by the inclusions to the lower surface side of each floor slab block 2a by a crane, carried out and removed. As described above, by performing the operations (1) to (8), the floor slab 2 installed on the main girder can be removed very easily for each floor slab block 2a. Then, after removing the floor slab for each block in this way, and further by hanging on the main girder and cleaning,
A new floor slab will be laid on this main girder.

As described above, according to the floor slab removing apparatus, the floor slab block 2a can be very easily separated from the main girder by lifting the end of the beam portion 12 by the crane. In other words, since the lifting bolt 22 is lifted by using the beam portion 12 having the installation portion provided with the installation member 15 as a fulcrum to lift the floor slab block 2a, the floor slab block 2a can be lifted with a small force. it can. As a result, large-weight jacks 6 that generate large forces are provided at both ends of the beam portion 4, and the beam portion 12 is directly lifted by the extension force of these jacks 6 and the floor slab block 2 is lifted through the lifting bolts 5.
Compared with the conventional device that lifts a, the device can be made lighter and simpler, and the handleability is greatly improved.
The work period can be shortened by improving the work efficiency, and further, the cost of the device can be reduced.

Next, the floor slab removal apparatus of the second embodiment will be described with reference to FIG. This removal device 11A is a telescopic beam 31 having a link mechanism by connecting a plurality of beam portions 12 to each other. And this removal device 11
The installation member 15 is provided at each end of the lower beam portion 12a of the telescopic beam 31 of A, and the end portion of the upper beam portion 12b serves as a locking portion 32 to which the wire Y of the crane is locked. ing. Then, the floor slab 2 is removed by the removing device 11A.
In the case of removing the floor slab 2, the floor slab 2 is cut in the width direction by a cutter to form a plurality of floor slab blocks 2a, and the removal device 11A is installed across the floor slab blocks 2a to be removed, and is formed in advance. The lifting bolts 22 provided on the lower beam portion 12a are respectively inserted into the through holes 24, the washer 25 is attached to the bolt portion 21 formed at the tip thereof, and the nut 26 is fastened to the floor portion block 2a. The lower surface is locked, and in this state, the locking portion 32 of the upper beam portion 12b
Is pulled up by a crane via wire Y.

In this way, the beam portions 12 of the removing device 11A rotate relative to each other at their connecting points, and the inclination angle of the lower beam portion 12a gradually increases.
As a result, the lifting bolt 22 connected to the lower beam portion 12a is pulled upward, and with this,
The floor slab 2a is pulled up. Then, when the floor slab block 2a is pulled up in this way, an inclusion is interposed in the gap on the lower surface side of the floor slab block 2a, and a wire is hung from the gap to the lower surface side of each floor slab block 2a and lifted by a crane. Plate block 2a
After unloading and removing it, and after cleaning the main girder by scraping, a new floor slab is laid on this main girder. in this way,
According to the removing device 11A, since the beam portions 12 are simply connected to each other, the cost of the device itself can be reduced. Further, the floor slab block 2a can be lifted right above, and thus the wire hanging work for carrying out the floor slab block 2a can be efficiently performed.

In the first embodiment, the floor slab is cut diagonally to form a floor slab block 2a.
Although the peeling of “a” is facilitated, it goes without saying that it may be cut vertically. Further, in the above-described embodiment, the lifting bolt 22 is provided with the through hole 24 formed in the floor slab block 2a.
Although the washer 25 and the nut 26 were attached to the ends of the floor bolt block 2a, the mounting structure of the lifting bolt 22 to the floor slab block 2a is not limited to the above-mentioned structure. You may attach it to. In addition, in the above-described embodiment, the crane is used as the means for applying the force, but a jack may be used instead of the crane. In this case, in the first embodiment, as shown in FIG. 6, a jack 35 is provided between the adjacent floor slab block 2a straddling the floor slab block 2a to be peeled off and the other end of the beam portion 12. The other end of the beam portion 12 may be pushed up, and in the second embodiment, as shown in FIG. 7, the upper beam portion 1
The jack 36 is provided between the ends of the beam 2b to form the beam 12b.
It suffices to pull the ends of each other toward each other.

[0016]

As described above, according to the floor slab removing apparatus of the present invention, the following effects can be obtained. According to the floor slab removal apparatus of claim 1, since the lifting member is lifted by using the beam portion with the installation portion as a fulcrum to lift the floor slab, the floor slab block can be lifted with a small force. You can As a result, large-weight jacks that generate large forces are provided at both ends of the beam, and the beam is lifted directly by the extension force of these jacks, compared to conventional equipment that lifts the floor slab through the lifting bolt. As a result, the weight and simplification of the device can be achieved, the handleability can be greatly improved, the work period can be shortened due to the improvement in work efficiency, and the cost of the device can be reduced.

According to the floor slab removal device of the second aspect,
Since each installation part is used as a fulcrum and the middle part is rotatably connected to each other as a lever to lift the lifting member and lift the floor slab, the floor slab block is lifted with a small force. be able to. As a result, large-weight jacks that generate large forces are provided at both ends of the beam, and the beam is lifted directly by the extension force of these jacks, compared to conventional equipment that lifts the floor slab through the lifting bolt. As a result, the weight and simplification of the device can be achieved, the handleability can be greatly improved, the work period can be shortened due to the improvement in work efficiency, and the cost of the device can be reduced.
Further, the floor slab block can be lifted right above, whereby the wire hanging work for carrying out the floor slab block can be efficiently performed.

According to the floor slab removing apparatus of the third aspect,
Since a plurality of beam parts whose intermediate parts are rotatably connected to each other are connected to each other to have a link mechanism, for example,
A large floor slab can be removed by increasing the length of the lower beam portion.

[Brief description of drawings]

FIG. 1 is a perspective view of a floor slab on which a removal device is installed for explaining a configuration and a structure of a floor slab removal device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a floor slab on which a removal device is installed for explaining the configuration and structure of the floor slab removal device according to the first embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of the removal device for explaining the configuration and structure of the floor slab removal device according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a floor slab provided with a removal device for explaining a method of removing the floor slab by the floor slab removal device according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of a floor slab provided with a removal device for explaining the configuration and structure of the floor slab removal device according to the second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a floor slab provided with a removing device for explaining the configuration and structure of another floor slab removing device according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view of a floor slab provided with a removal device for explaining the configuration and structure of another floor slab removal device according to the second embodiment of the present invention.

FIG. 8 is a perspective view of a floor slab on which a removal device is installed for explaining the configuration and structure of a conventional floor slab removal device.

[Explanation of symbols]

 2 floor slab 2a floor slab block 11, 11A removing device 12, 12a, 12b beam part 15 installation member (installation part) 18 locking member (locking part) 22 lifting bolt (lifting member) 32 locking part Y wire

Claims (3)

[Claims] 1. When removing a concrete floor slab installed on a main girder constituting a road bridge or the like in the axial direction of the bridge by cutting it into blocks to remove the floor slabs, Is a floor slab removing device for peeling the floor slab block from the main girder, one end of which is an installation part installed on the floor slab adjacent to the floor slab to be removed, and the other end of which is to be removed. A beam part extending to the upper side of the beam part and connected to a lifting member attached to the floor slab block in the middle part, and imparts an upward force to the other end of the beam part. Thus, the floor slab removal device, wherein the floor slab block is lifted through the lifting member. 2. When removing a concrete floor slab installed on a main girder constituting a road bridge or the like in the axial direction of the bridge by cutting it into blocks to remove the floor slabs, A floor slab removing device for peeling the floor slab block from the main girder, and one end of which is an installation unit installed on each floor slab adjacent to the floor slab that sandwiches the floor slab that is removed,
A lifting member attached to the floor slab is provided between the installation portion and the connecting portion of the beam portions, the pair of beam portions having intermediate portions that are rotatably connected to each other. Of the floor slab, which is connected to the other end of the beam portion, by applying a force in a direction upward or close to each other, thereby lifting the floor slab block via the lifting member. Removal device. 3. The other end of the beam part is rotatably connected to one end of each of the connecting beam parts whose intermediate parts are rotatably connected to each other. The floor slab removal apparatus according to claim 2, wherein the floor slab block is lifted via the lifting member by applying a force directed upward or in a direction approaching each other.