JP2003147726A - Construction method for composite floor system and floor system panel used in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for a composite floor system and a floor system panel used in the same capable of solving problems such as traffic restriction to which importance is given in floor system replacing construction work and prolongation of construction term and corresponding to insufficiency of loading capacity of the floor system without increasing a load on a beam supporting the floor system. SOLUTION: The floor system panel constituting the composite floor system is composed of an upper steel plate, a plurality of shape steel arranged on a lower face of the upper steel plate at the required interval in parallel, and a bottom steel plate connecting the shape steel to cope with traffic load by a steel shell only. The floor system panels are mutually joined from a bottom face side of the floor system panel, and filling of filler such as high fluidity concrete is performed from the bottom face side or a side face side of the floor system panel. As for the floor system replacing construction work, old floor system is removed and the floor system panels are constructed under traffic restriction, and the floor system panels are mutually connected and filling of filler is performed while traffic is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a composite floor slab having a main structure made of a steel shell made of a steel member, and a filling material filled in the interior, and a unitized floor slab used for the construction method. It relates to panels, and is mainly used to replace floor slabs such as bridges.

[0002]

2. Description of the Related Art Conventionally, reinforced concrete floor slabs have been widely used for slabs for bridges, etc., but with the recent increase in vehicle wheel load and traffic volume, deterioration of aging reinforced concrete floor slabs has occurred. The number of cases is increasing, which is a problem in maintenance and management.

As a method for repairing a damaged reinforced concrete floor slab, the following methods have been conventionally adopted. (1) Repairing cracks in floor concrete by injecting resin. (2) Addition of vertical girders and reinforcement by bonding steel plates. (3) Replacement of reinforced concrete floor slab. (4) Replacement with other format floor slabs (precast floor slab, steel floor slab, synthetic floor slab, etc.).

The above method (1) is a method used when the damage to the floor slab is relatively slight, and the resin is injected into the cracks to increase the water tightness of the floor slab and prevent the deterioration of concrete and reinforcing bars. effective.

The above method (2) is a method of reinforcing the damaged floor slab to reduce the bending moment acting on the floor slab by a live load or to increase the resistance of the floor slab. , It can be expected to have the effect of stopping or delaying the progress of damage to the damaged floor slab.

However, the methods (1) and (2) are for dealing with a floor slab that has already been damaged, so the floor slab will deteriorate even after repair and reinforcement, and re-repair becomes necessary. Further, there is a problem that it cannot be applied to a floor slab that is significantly damaged.

On the other hand, as in the above methods (3) and (4), in the method of replacing the floor slab after replacing the existing floor slab or replacing it, the floor slab is replaced with a new sound one. Various situations can be dealt with, such as severe damage, defective construction of existing floor slabs, and insufficient load bearing capacity of existing floor slabs due to increased traffic.

However, in the method of (3) above, during the construction period,
For placing concrete, traffic must be completely blocked or lanes must be regulated, and it is necessary to prevent vibration and impact until the placed concrete hardens.Construction construction period and traffic regulation period However, it is necessary to increase the thickness of the floor slab to compensate for the lack of load-bearing capacity of the existing floor slab, which increases the load on the girder supporting the floor slab.

On the other hand, in the method of (4) above, a floor slab such as a steel floor slab or a steel / concrete composite floor slab has a higher load-bearing performance than the reinforced concrete floor slab even if the floor slab is as thick as the reinforced concrete floor slab. Since it can be used, it is possible to sufficiently cope with the lack of load bearing capacity of the existing floor slab without increasing the load on the girder.

As such a floor slab, for example, Patent No. 3
There is a composite floor slab described in 191569. In this composite floor slab, the main structure is a bottom steel plate 1 ', a plurality of shaped steel plates 2'arranged in parallel on the upper surface of the bottom steel plate 1'at required intervals, and a connecting steel plate bridged between adjacent shaped steel plates 2'. 3 ', and a filling material 4'as a reinforcing material or a stiffening material is filled in the hollow portion formed between the bottom steel plate 1'and the connecting steel plate 3'.

Since this composite floor slab is used to manufacture steel members in a factory, work efficiency at the erection site can be improved. Furthermore, when superfluid concrete or the like is poured as a filling material on site, it is transported or erected. It is a floor slab that has the advantages of being small in weight and being easy to handle at the stage of construction, and that can be used for replacement work.

[0012]

Problems to be Solved by the Invention Patent No. 3191569
The composite floor slab of No. is more convenient to apply to floor slab replacement work than other types of floor slabs, but after the steel shell consisting of bottom steel plate, shaped steel, and connecting steel plate is erected on the girder, Since the construction of the steel shell joint and the construction of the filler are carried out from the top surface of the floor slab, there remains a problem that traffic control on the bridge surface is required during this period.

The present invention has been made to solve the above problems, and solves the problems of traffic regulation and prolongation of construction period, which are important in floor slab replacement work for bridges, etc. It is an object of the present invention to provide a method for constructing a composite floor slab capable of coping with a lack of load bearing capacity of the floor slab without increasing the load on the girder supporting the floor and a floor slab panel used in the construction method.

[0014]

A method for constructing a composite floor slab according to claim 1 of the present application is a method for constructing a composite floor slab in which a filler is filled in a steel shell constituting the floor slab, A floor slab panel consisting of a steel shell having an upper steel plate, a plurality of shaped steels arranged in parallel on the lower surface of the upper steel plate at a required interval, and a bottom steel plate connecting the shaped steels, sequentially, at predetermined positions It is characterized in that the floor slabs are erected and arranged side by side, and adjacent floor slab panels are joined to each other through an opening formed on the bottom surface side of the floor slab panels.

As the shaped steel arranged on the lower surface of the upper steel plate,
For example, T-section steel, H-section steel, channel steel, and the like can be used, and in general, the upper edge or flange of the section steel is joined to the upper steel plate by welding or the like in a factory or the like.

As the filler, materials such as concrete, foam concrete, lightweight concrete and urethane can be used, and the strength required by the target composite floor slab,
A filler is selected according to the constraints of floor slab weight, which is determined by the rigidity and load bearing capacity of supporting structures such as girders, and the constraints of construction costs.

For example, when the composite floor slab construction method of the present invention is used for floor slab replacement work of a bridge such as a road bridge, an existing bridge whose construction time is old has a design load smaller than that of the existing floor, Although the thickness of the slab is thin and the load-carrying capacity of the girder is often small, when replacing such a floor slab, a lightweight filler is preferable.

Further, in the floor slab replacement work, it is necessary to minimize the influence on the existing traffic, so that it is often impossible to secure a sufficient space for the construction equipment and the construction machine.
Therefore, it is necessary to divide the floor slab into relatively small and lightweight panels before carrying them to the site, but as a result, the number of panel-to-panel joints increases and the construction takes time.

In the conventional floor slab, since the joint between the panels is constructed from the top surface of the floor slab, there is a problem that the traffic regulation during this period is prolonged. On the other hand, in the composite floor slab of the present invention, by using the steel shell having the required strength, even before the joint between the panels and the filler are constructed, fatigue damage of the steel shell does not become a problem in a short period of time. It is possible to open the traffic on the bridge in the interval, and by constructing joints and fillers while opening the traffic, the traffic regulation period can be greatly shortened.

When considering the long-term service condition after the completion of the floor slab replacement work, from the viewpoint of the durability of the floor slab and the running property of the vehicle on the road surface, the floor slab panels are connected by a joint to load the wheels. It is necessary to secure a load distribution effect on the steel, and it is necessary to fill the hollow portion with a filler so that stress concentration does not occur in the steel shell due to concentrated load.

If the method of filling the filling material is such that only the steel shell is manufactured in the factory and then installed and then filled in the field, the weight at the time of delivery to the site can be reduced. This allows construction machines such as cranes used for erection to be small,
The problem of construction space is reduced.

If a particularly lightweight material such as foamed concrete or urethane is used as the filler, or if the construction space does not pose a problem, a method of filling the filler at the factory and then carrying it to the site is also possible. In that case, the construction period for on-site construction can be shortened. It is also possible to fill a part of the filling material at the factory and fill the rest after the joint between the floor slabs is constructed.

As a mode of joining floor slab panels to each other through the opening on the bottom side, upper steel plates are joined to each other between adjacent floor slab panels in the joint, joints between shaped steels, and joints to joint members attached separately. , Or a combination thereof can be considered.

According to a second aspect of the present invention, in the method of constructing a composite floor slab according to the first aspect, the openings are formed between the shaped steels or bottom steel plates of adjacent floor slab panels, and the floors are opened from the openings. After joining the slab panels, between the shaped steel or the bottom steel plates of the adjacent floor slab panels, a bottom steel plate or a connecting member separate from the floor slab panel is joined to close the opening. It is a feature.

As for the form of the opening for joining the floor slab panels from the bottom side, various forms are conceivable, such as an opening which is continuous along the joint or a partially formed opening. 2 is a typical form, in which there is no bottom steel plate in the joint part, and an opening is formed between the shape steels of adjacent floor slabs, and this opening is later connected by a bottom steel plate or a connecting member prepared separately. Limited when closing or when the bottom steel plate protrudes from the shaped steel to the joint side, and when openings are formed between the bottom steel plates and the bottom steel plate or shaped steel is connected later by a connecting member. It was done.

The same applies to claim 1,
The closure of the opening does not necessarily have to be a closure as long as there is no problem in filling the filling material.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the method of constructing a composite floor slab according to, filling the filler, after the floor slab panel is erected at a predetermined position, it is performed from the inlet formed on the bottom side or side surface side of the floor slab panel. It is a feature.

According to the third aspect of the present invention, the filling material is filled on site. However, in the case of the conventional floor slab, when the filling material such as concrete or the like is completed, the road is opened when the road bridge is opened. In the case of the structure of the above, the service according to the purpose has started, but by using the steel shell having the required strength in the composite floor slab of the present invention, it is possible to use only the steel shell in the short term. It is possible, and by carrying out the construction of the filling material while it is in service, it becomes possible to open it for other purposes, such as opening it to traffic.

The injection port may be formed in advance on the floor slab panel, may be provided at a joint position between the floor slab panels, or may be provided at a bottom steel plate or a connecting member attached at the joint position. .

The floor slab panel according to claim 4 of the present application comprises an upper steel plate, a plurality of shaped steel plates arranged in parallel on the lower surface of the upper steel plate at required intervals, and a bottom steel plate connecting the shaped steel plates. Is a floor slab panel in which a hollow portion for filling with a filler is formed inside a steel shell having an opening, and an opening for joining the floor slab panels is formed on the bottom surface side of the floor slab panel. It is characterized by being.

This floor slab panel can be used in the method for constructing a composite floor slab according to any one of claims 1 to 3, and is designed so that the steel shell portion is designed to have required strength and rigidity, thereby filling It can function as a floor slab before the material is filled, and the floor plate panels can be joined from the bottom side by the opening formed on the bottom plate side.

According to a fifth aspect of the present invention, in the floor slab panel according to the fourth aspect, the inlet for filling the filling material is formed on the bottom surface side or the side surface side. is there.

In the floor slab panel of claim 5, a filler injection port is further formed on the bottom surface side or the side surface of the floor slab panel. Filling of the filler can be performed.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the floor slab panel according to (1), the upper surface of the upper steel plate is provided with a slip stopper.

As for the pavement on the bridge surface of a road bridge or the like, it is preferable to carry out the construction continuously so that no joint remains on the pavement surface. Is.

In the present invention, the bridge surface is formed by the upper steel plate when the floor slab panel is installed, but a slip stopper is provided on the upper surface of the upper steel plate in order to prevent slip accidents and ensure safety during construction. Is desirable. As a non-slip, a method of using a striped steel plate on which projections are integrally formed on a steel plate, a method of sprinkling sand on a resin-coated steel plate to form a non-slip, and a factory construction of only the base layer of asphalt pavement on the steel plate There are ways.

The construction method and floor slab panel of the composite floor slab of the present invention can be applied not only to floor slab replacement work on road bridges, etc., but also to slab replacement work other than bridges, and urgently. It can also be applied to new construction of floor slabs when temporary use is required for transportation or other purposes.

[0038]

FIG. 1 shows an embodiment in which the present invention is applied to a bridge floor slab.

The upper steel plate 1 and a plurality of shaped steels 2 (T-shaped steels in this embodiment) arranged in parallel on the lower surface of the upper steel plate 1 at required intervals are bridged between adjacent shaped steels 2. The steel shell composed of the bottom steel plate 3 bears the effect of exerting the load-bearing capacity required for the floor slab at least in the short term, and is provided in the hollow portion formed between the top steel plate 1 and the bottom steel plate 3. Filling material 4
Supports the upper steel plate 1 and exhibits the function of retaining the shape of the steel shell. Further, a steel plate provided with a slip stopper 5 is used as the upper steel plate 1.

The main girders 6 of the bridge and the floor slab are connected to each other by a fixed metal member 7 such as an angle or by a shift stopper (not shown) such as a stud. The fixed hardware 7 has a function of positioning at the time of erection of the steel shell, and also has a function of transmitting the load acting on the floor slab to the main girder 6 before the filling material 4 is constructed.

In the composite floor slab of the present invention, it is advantageous in terms of transportation and construction that the composite floor slab is manufactured in a factory and carried into a construction site in a panel shape, and then integrated. It shows in FIGS.

FIG. 2 shows one embodiment of a joint portion for connecting floor slab panels in the bridge axial direction when the present invention is applied to a bridge. The upper steel plate 1 is pulled through the joint plate 1a. After joining with the bolts 9, the bottom steel plate 3a separately prepared from the floor slab panel is fixed to the lower surface of the shaped steel 2 with bolts 10.

FIG. 3 shows another embodiment of the joint portion which similarly connects the floor slab panels in the bridge axis direction. The joint plate 11 is added to the joint of the upper steel plate 1 and the friction joint is carried out by the bolts 12. That is the case. In this case as well, after the upper steel plate 1 is joined, the bottom steel plate 3a of the joint portion is similarly attached.

The joining of the upper steel plates 1 to each other and the attachment of the bottom steel plate 3a to the shaped steel 2 are not limited to the bolt joining, and other methods such as welding may be used as long as they are constructed from the bottom surface of the floor slab.

FIG. 4 shows an embodiment of a joint portion for connecting floor slab panels in a direction perpendicular to the bridge axis when the present invention is applied to a bridge. Steel 2
The floor slabs adjacent to each other in the direction of are connected, and the joint plates 13 provided at the ends of the floor slabs are tightened with the bolts 9 so that the bending moment can be transmitted.

Further, each floor slab panel is fixed to the main girder 6 by the fixing hardware 14. The bottom steel plate 15 near the main girder 6 is removed during panel installation, and after fixing the main girder 6 to the floor slab panel and between the adjacent floor slab panels, the bottom steel plate 15 is fixed at a predetermined position with a bolt 16 or the like. Install.

FIG. 5 shows an example of the construction flow when the present invention is applied to the replacement work of a bridge deck.

In this example, the removal of the old floor slab, the installation of the floor slab fixing hardware, the studs, and the erection / fixation of the floor slab panel (steel shell) are performed while traffic control such as alternate traffic on one side at night. , The floor slab panel joints are connected in the daytime with the traffic open, and the floor slab panels are connected with respect to a predetermined section, and then the filler (high-fluidity concrete, etc.) is filled in the daytime with the traffic open.

Then, after the completion of the filling work of the predetermined section, the pavement and the attached facilities are installed on the upper steel plate on the upper surface of the floor slab panel while traffic is regulated at night, and the floor slab replacement work is performed. Complete.

It should be noted that the above only shows one embodiment, and it is possible that part of the connection of the joints of the floor slab panel and the filling of the filling material are performed under the traffic regulation state.

In the method of constructing a composite floor slab of the present invention, since the panel connection after the slab panel installation and the concrete filling work can be performed from the bottom surface side or the side surface side of the floor slab panel, the floor slab of another conventional type can be used. Compared with, the work time on the bridge surface is shortened, and the traffic regulation due to construction can be minimized.

FIG. 6 and FIG. 7 each show an example of a filling method of the filling material. In the example of FIG. 6, filling is performed from the floor slab bottom side for each of the slab panels divided in two in the direction perpendicular to the bridge axis, and in the example of FIG. From the same time.

When the filling is carried out by these methods, the moving distance of the filling material becomes long, so that the filling material is preferably a material having high fluidity. In particular, when using concrete as a filler, by using high-fluidity concrete or lightweight high-fluidity concrete that uses lightweight aggregate as aggregate, the material separation that occurs when the moving distance of concrete becomes long Problems can be avoided and high quality concrete can be spread in the steel shell.

Further, in addition to the injection port 17, an outflow port is provided to check the overflow, so that the concrete filling can be confirmed.

[0055]

According to the method of constructing a floor slab of the present invention, the upper surface of the floor slab can be temporarily used even during the work of connecting the floor slabs and filling the filler, and when applied to a road bridge or the like. In, since traffic can be released on the bridge surface during construction, it is possible to eliminate inconveniences such as the occurrence of traffic jams due to construction.

Since the work of assembling the frame and the work of arranging the filling material are not required at the time of applying the filling material, it is possible to save the labor of the on-site work and shorten the construction period, and to shorten the traffic regulation time during the construction such as a road bridge.

By using the floor slab panel of the present invention for the bridge floor slab replacement work, the number of constituent members of the floor slab is small, the factory production is rationalized, and the work at the erection site is made efficient.

Further, when the upper surface of the floor slab is provided with anti-slip, even when the upper steel sheet is not paved at the stage of temporary use during construction at a road bridge, etc. Accidents are prevented and safety is increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing an embodiment of a joint portion that connects floor slab panels in the bridge axis direction when the present invention is applied to a bridge.

FIG. 3 is a vertical cross-sectional view showing another embodiment of a joint portion that connects floor slab panels in the bridge axis direction when the present invention is applied to a bridge.

FIG. 4 is a vertical cross-sectional view showing an embodiment of a joint portion that connects floor slab panels in a direction perpendicular to the bridge axis when the present invention is applied to a bridge.

FIG. 5 is a construction flow diagram in an embodiment of a construction method of a composite floor slab of the present invention.

FIG. 6 is a vertical cross-sectional view showing an example of a filling method of a filling material according to the present invention.

FIG. 7 is a vertical cross-sectional view showing another example of the filling material filling method according to the present invention.

FIG. 8 Conventional composite floor slab (Patent No. 3191569)
It is a perspective view which shows the constructional example of.

[Explanation of symbols]

1 ... Upper steel plate, 1a ... Joint plate, 2 ... Shaped steel, 3 ... Bottom steel plate, 3
a ... bottom steel plate of joint part (bridge axis direction), 4 ... filling material, 5 ... non-slip, 6 ... main girder, 7 ... floor plate fixing hardware, 8 ... welded part, 9
... Bolts, 10 ... Bolts, 11 ... Joining plates, 12 ... Bolts, 13 ... Jointing plates, 14 ... Floor slab fixing hardware, 15 ... Bottom steel plate for joints (direction perpendicular to the bridge axis), 16 ... Bolts, 17 ... Injection port , 18 ... Outflow port, 1 '... Bottom steel plate, 2' ... Shaped steel, 3 '...
Connection steel plate, 4 '... filling material, 5' ... mounting hole, 6 '... main girder,
7 '... formwork, 8' ... non-shrink mortar

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mamoru Izawa             4-53 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture             Sumitomo Metal Industries, Ltd. (72) Inventor Toshiyuki Nakagawa             4-53 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture             Sumitomo Metal Industries, Ltd. F term (reference) 2D059 AA17 CC03 GG55

Claims (6)

[Claims] 1. A method of constructing a composite floor slab in which a steel shell constituting the floor slab is filled with a filler, wherein the upper steel plate and the lower surface of the upper steel plate are arranged in parallel at a required interval. A plurality of shaped steels, and a floor slab panel made of a steel shell having a bottom steel plate connecting the shaped steels, sequentially erected and arranged at predetermined positions,
A method of constructing a composite floor slab, wherein adjacent floor slab panels are joined to each other through an opening formed on a bottom surface side of the floor slab panels. 2. The shaped steel sheets of adjacent floor slab panels are formed after the openings are formed between the shaped steel sheets or bottom steel sheets of adjacent floor slab panels, and the floor slab panels are joined from the opening portions. The method for constructing a composite floor slab according to claim 1, wherein a bottom steel plate or a connecting member separate from the floor slab panel is joined between the bottom steel plates to close the opening. 3. The filling material is filled from an injection port formed on a bottom surface side or a side surface side of the floor slab panel after the floor slab panel is installed at a predetermined position. The construction method of the composite floor slab according to 1 or 2. 4. A filler is provided inside a steel shell having an upper steel sheet, a plurality of shaped steel sheets arranged in parallel on the lower surface of the upper steel sheet at required intervals, and a bottom steel sheet connecting the shaped steel sheets. A floor slab having a hollow portion for filling, characterized in that an opening for joining the floor slab panels is formed on the bottom side of the floor slab panel. panel. 5. An injection port for filling the filling material,
The floor slab according to claim 4, wherein the floor slab is formed on the bottom surface side or the side surface side. 6. The floor slab panel according to claim 4, wherein an upper surface of the upper steel plate is provided with a slip stopper.