JP2004353321A - Method for connecting bridge girders of rigid-frame bridge together - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for connecting bridge girders of a rigid-frame bridge together, which completes connecting work in a short period of time. <P>SOLUTION: In this method for connecting the bridge girders of the rigid-frame bridge wherein the bridge girder and a head of a bridge pier are rigidly connected together, a delivery-side bridge girder 2 for temporarily placing a coupling girder 1 for connecting the bridge girders together, and a receiving-side bridge girder 3, which enables the integral movement of the bridge pier 31 and the bridge girder, are constructed; the coupling girder, which is protruded from a leading end of the delivery-side bridge girder, is delivered in the direction of the receiving-side bridge girder while being supported from below by a carrier vehicle 4 with a liftable platform; the coupling girder, which is conveyed by the carrier vehicle with the platform, is arranged between the delivery-side bridge girder and the receiving-side bridge girder, which have an interval longer than the coupling girder in between; an end of the coupling girder and that of the delivery-side bridge girder, which face each other, are joined together; the receiving-side bridge girder is moved in the direction of the coupling girder along with the rigidly connected bridge pier; and the end of the coupling girder and that of the receiving-side bridge girder, which face each other, are joined together. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting bridge girders between bridge girders constructed from both sides of an intersecting road or the like in a bridge constructed when a road or a railway crosses three-dimensionally.
[0002]
[Prior art]
2. Description of the Related Art When a new road or the like is constructed over a road such as a road, a railroad, or a river in an urban area, a rigid-frame bridge in which a bridge girder and a head of a pier are rigidly connected may be conventionally constructed. The rigid frame bridge can be made slim by rigidly connecting the pier head and the bridge girder.However, it requires a higher-precision erection work than a girder bridge that only mounts the girder on the pier. You.
A general method of erection of a ramen type bridge is a hand-rolling erection method in which a bridge girder having an elongated hand-rolling machine attached to the tip is sent out from one side and erected. There is also a method in which bridges are constructed on both sides of an intersecting road, and finally, a connecting girder b lifted by a crane is arranged between the bridge girder and connected.
[0003]
[Problems to be solved by the invention]
The above-described method of connecting the bridge girders of the ramen-type bridge has the following problems.
<B> Hand-rolled erection method is a proven method that can be used even when crossing a valley where it is difficult to build a scaffold from below, but it takes time to erection because the bridge girder is sent out little by little. For this reason, when the vehicle is erected on a road in an urban area where traffic is heavy and traffic control is difficult, it may cause a problem such as traffic congestion for a long time.
<B> The method of connecting the bridge girder a with the connecting girder b lifted by a crane is a method that can perform connection at a time, and can be erected in a shorter time than the hand-rolled erection method. However, as the connection girder b becomes longer, the connection girder b hung by the wire c is bent, and it becomes more difficult to match the end face of the connection girder b with the end face of the bridge girder a. In particular, when joining by bolts, bolts cannot be inserted unless the end face of the existing bridge girder a and the end face of the connection girder b are accurately aligned, and it takes time to complete the joining.
[0004]
[Object of the invention]
The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a method for connecting bridge girders of a ramen-type bridge in which connection work is completed in a short time. In particular, it is an object of the present invention to provide a method of connecting between bridge girders of a ramen-type bridge that can reduce traffic control of a road or the like passing under a bridge to be installed in a short time.
It is another object of the present invention to provide a method for connecting bridge girders of a rigid-frame bridge which can easily and accurately join the bridge girders.
The present invention achieves at least one of these objects.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a method of connecting between bridge girders of a ramen type bridge according to the present invention is a method of connecting between bridge girders of a ramen type bridge in which a bridge girder and a pier head are rigidly connected. A delivery side bridge girder for temporarily placing a connection girder to connect, a pier and a bridge girder are integrated to construct a movable welcome side bridge girder, and the connection girder protruding from the tip of the delivery side bridge girder, The carrier with the elevator is sent out in the direction of the pick-up side bridge girder while being supported by the carrier with the elevator from below, and between the delivery-side bridge girder and the welcome-side bridge girder having an interval wider than the length of the connecting girder. The connecting girder transported by the above is arranged, the end of the connecting girder facing and the end of the delivery side bridge girder are joined, and the welcome side bridge girder is moved in the direction of the connecting girder together with the rigidly connected pier. End of the connecting girder A method of joining the ends of the pick-up side girder and. Here, "joining" of "joining the opposite end of the connecting girder and the end of the delivery-side bridge girder" includes temporary joining in addition to main joining. That is, at this point, the temporary joining is performed, and the actual joining work can be performed in parallel with or independently of the subsequent work. In addition, by performing a part or all of the main bonding from the beginning, the bonding at this point can be performed. The same definition of "joining" applies to "joining the opposite end of the connecting girder and the end of the welcome side bridge girder."
Also, the pick-up side bridge girder is supported by a pier rigidly connected to the bridge girder and a temporary support base slidably supporting the bridge girder until the end of the connecting girder and the end of the pick-up side girder are joined. be able to. In addition, by using a plurality of the transport vehicles with the lifting platform, the connecting girder can be transported in a state close to the stress state after the connection. Further, the pick-up bridge girder can be moved by sliding a pier on the upper surface of the substructure.
Further, by adjusting the weight of the welcome side bridge girder projecting to the opposite side to the connecting girder, when the end of the connecting girder and the end of the welcome side bridge girder are joined, they are rigidly connected to the welcome side girder. It is possible to prevent the lower part of the pier from moving in the direction opposite to the connecting girder.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0007]
<A> Connection girder In the present invention, the connection between the bridge girder 2 and the bridge girder 3 is performed by the connection girder 1 at a time. That is, the connection girder 1 is a bridge girder having a length connecting the bridge girder. For example, when a bridge is bridged over a road with heavy traffic, it is desired to reduce traffic restrictions on the road as much as possible. Therefore, if the connection can be made at a time by the connection girder 1 wider than the width of the road, the time of traffic regulation can be minimized.
The connecting girder 1 is manufactured to have a predetermined length by combining steel plates or shaped steel materials. The connecting girder 1 can also be manufactured by manufacturing a girder member in block units at a factory or the like, transporting the girder member to a position above the sending-side bridge girder 2 and joining a plurality of girder members. In addition, when the connecting girder 1 is manufactured, if the side walls 11 and the like are attached in advance, it is possible to save the trouble of attaching from below using the crane 8 or the like after the erection. Since the connecting girder 1 can be manufactured on the delivery-side bridge girder 2 described later, there is no need to separately secure a manufacturing yard.
[0008]
<B> Sending-side bridge girder The sending-side bridge girder 2 is a bridge girder installed on the side from which the connecting girder 1 is sent out. The outgoing bridge girder 2 is erected on site before the connecting girder 1 is manufactured.
The delivery-side bridge girder 2 is installed on a pier 21 provided on a foundation such as a pile. The pier 21 is constructed of steel or reinforced concrete.
The ramen-type bridge is constructed by rigidly connecting the bridge girder 2 and the head of the pier 21. FIG. 6 shows an embodiment in which the delivery-side bridge girder 2 and the pier 21 are combined. The bridge can be erected only for the graded intersection. In this case, the outgoing bridge girder 2 serving as the approach part to the intersection is a ramp (see FIG. 1).
A rail 71 extending in the extending direction is provided on the upper surface of the delivery-side bridge girder 2 so that the connecting girder 1 can slide.
[0009]
<C> Pick-up side bridge girder The pick-up side bridge girder 3 is a bridge girder that moves in the direction of the connection girder 1 after joining the connection girder 1 and the delivery side bridge girder 2. At least one pier 31 is rigidly connected to the welcome bridge 3. Then, when the bridge girder 3 moves, the pier 31 also moves.
The pier 31 includes an outer shell 312 installed on a foundation 33 such as a pile, and a column 311 extending in a column shape from the outer shell 312 (see FIGS. 4 and 5). An outer shell 312 is installed on the upper surface of a substructure 33 such as a pile projecting from the bottom of the excavated portion excavated with the earth retaining 6 via a low friction plate 34 having a small frictional resistance. Here, a tetrafluoroethylene plate, a stainless plate, or the like can be used as the low friction plate 34. The low friction plate 34 is preferably mounted not only on the upper surface of the substructure 33 but also on the outer shell 312 side. The outer shell 312 is for transmitting the load of the bridge 3 and the pier 31 before filling with the hardening material to the substructure 33, and the outer peripheral portion 312a serving as a formwork of the hardening material such as concrete to be cast inside after the movement. Beam portion 312b. After the outer shell 312 has been installed, the column 311 is extended to a predetermined height. Here, the outer shell 312 and the pillar 311 can be manufactured using a steel plate, a shaped steel material, a steel pipe, or the like.
The welcome side bridge girder 3 is rigidly connected to the head of the pier 31. Since it is difficult to stably support the bridge girder 3 with only one pier 31, the other end of the bridge girder 3 is supported by a temporary support 32. It should be noted that another movable pier 31 similar to the pier 31 described above can be constructed and supported.
The temporary support 32 is a temporary support that is removed after the joining of the bridge girder is completed and the structure is stabilized. The welcome bridge 3 is slidably supported on a temporary support 32. When the temporary support 32 movable with the pick-up side bridge girder 3 is used, the bridge girder 3 and the head of the bridge support 32 are joined together.
[0010]
In the present invention, there is a gap between the welcome bridge girder 3 and the existing bridge girder 5 at the rear, and the rear end of the welcome bridge girder 3 when the delivery bridge girder 2, the connecting girder 1 and the welcome bridge girder 3 are joined. Is not bound. For this reason, when the pick-up side bridge girder 3 is joined to the connecting girder 1, the head of the pier 31 rigidly connected to the pick-up side bridge girder 3 is drawn toward the connecting girder 1 side. There is a risk of moving in the opposite direction.
Therefore, the girder length of the welcome side bridge girder 3 projecting to the temporary support base 32 side is increased, or the weight of the welcome side bridge girder 3 protruding to the opposite side to the connecting girder 1 is adjusted by placing a counterweight or the like. Keep it. In this way, when the end of the connecting girder 1 and the end of the pick-up bridge girder 3 are joined, the weight of the projecting portion on the existing bridge girder 5 side of the picking-up bridge girder 3 is drawn to the connecting girder 1 side. Therefore, it is possible to prevent the lower portion of the pier 31 from moving in the direction opposite to the connecting girder 1.
[0011]
<D> The transport vehicle 4 with a lifting platform is a vehicle that supports the connecting beam 1 and transports it to a predetermined position. The elevator 41 provided on the carrier 4 is used when lifting or lowering the connecting girder 1.
The transport vehicle 4 is a known large transport vehicle that can move freely to move the connecting girder 1 to a predetermined position. For example, a transport vehicle capable of avoiding concentrated loading on the road surface and freely changing directions can be used by using a hydraulic suspension device having 6 wheels and 48 wheels.
[0012]
Hereinafter, a method for connecting the bridge girders of the rigid frame bridge according to the present invention will be described with reference to the drawings.
[0013]
<B> Feeding out the connecting girder (Figs. 1 and 2)
The delivery-side bridge girder 2 is erected on the pier 21, and the rail 71 is provided on the upper surface of the bridge girder 2. Then, a member for manufacturing the connection girder 1 is loaded on the rail 71 and assembled. The connecting girder 1 is arranged on a rail 71 via a bogie 72.
Next, the leading end of the connecting girder 1 manufactured by driving the self-propelled bogie 72 is sent out in the direction of the welcome side bridge girder 3 and connected to the elevator 41 of the carrier 4 waiting near the end of the bridge girder 2. Place the tip of girder 1. The connecting girder 1 is fixed to the head of the elevating platform 41, and the carrier 4 travels in the direction of the welcome side bridge girder 3 (see FIG. 1).
When the connecting girder 1 is sent out to a predetermined length, the second carrier 4 is sunk under the connecting girder 1 to support the connecting girder 1 with the two carriers 4 (FIG. 2). reference). The number of carriers 4 can be further increased depending on the length of the connecting girder 1.
[0014]
<B> Joining the bridge girder and the connecting girder on the delivery side (Fig. 3)
When the elevator 41 is lowered at a predetermined position, the height of the connecting girder 1 is sent out and adjusted to the height of the side bridge girder 2 (see FIG. 6). Since the distance between the end of the delivery-side bridge girder 2 and the end of the pick-up side bridge girder 3 is wider than the length of the connection girder 1, the connection girder 1 can be easily arranged between the bridge girder 2 and 3. it can. Although it depends on the length of the connecting girder 1, if the spacing between the bridge girders 2 and 3 is determined so that a gap of, for example, about 100 mm can be secured, the connecting girder 1 can be quickly inserted.
Since the connecting girder 1 is supported from below by the elevator 41 of the plurality of transport vehicles 4, the stress state is close to the state after the completion of the erection, and the connecting girder 1 can be transported with almost no bending. For this reason, the end face of the connecting girder 1 can be easily adjusted to the end face of the delivery-side bridge girder 2. Then, the joining is performed so that the end face of the delivery-side bridge girder 2 and the end face of the connection girder 1 are in contact with each other. The joining at this point may be a temporary joining using temporary bolts or pilot holes. This joining can be performed in parallel or independently of the subsequent work. The temporary joining and the final joining can be performed by bolts inserted into predetermined holes. With bolt joining, joining can be completed in a short time. Note that other known bonding methods can be adopted.
[0015]
<C> Joining with the pick-up side bridge girder (Figs. 3 and 4)
After joining the end face of the delivery-side bridge girder 2 and the end face of the connection girder 1, the welcome-side bridge girder 3 is moved together with the pier 31 toward the end face of the connection girder 1.
For example, if the outer shell 312 is pushed by the hydraulic jack 62 or the like while taking a reaction force to the belly 61 of the earth retaining 6 or the like, the beam 312 b of the outer shell 312 slides on the upper surface of the substructure 33. Pier 31 and bridge girder 3 can move. Here, since the upper surface of the substructure 33 and the beam portion 312b are in contact with each other via the low friction plate 34, they can slide easily. Further, if a gap is provided between the lower end of the outer peripheral portion 312a and the bottom plate 331, there is no hindrance during movement.
Since the pick-up side bridge girder 3 is only moved by the gap (for example, about 100 mm) provided in advance, the movement on the substructure 33 can sufficiently cope with it. When the outer shell 312 is installed, it is preferable that the outer shell 312 be shifted in advance by an amount to be moved later, and then moved later to be installed at the center of the substructure 33.
After moving the welcome side bridge girder 3, the end surface of the welcome side bridge girder 3 and the end surface of the connecting girder 1 are bolted. Then, the inside of the outer shell 312 is filled with a hardening material such as concrete to integrate the pier 31 and the substructure 33.
When a bridge girder is installed behind the welcome side bridge girder 3 with an interval (see FIG. 1), the existing bridge girder 5 and the welcome side bridge girder 3 are connected using a crane 8 or the like. If the gap between the existing bridge girder 5 and the pick-up side bridge girder 3 is narrow, even if the bridge girder connected by the crane 8 is lifted, the bridge girder has little deflection and can be easily joined.
[0016]
【The invention's effect】
The method for connecting the bridge girders of the rigid frame type bridge according to the present invention is as described above, and the following effects can be obtained.
<B> Since the pick-up side bridge girder can move, a wider gap than the length of the connecting girder can be secured between the connecting bridge girder. Therefore, the connecting girder can be quickly inserted, and the connecting operation is completed in a short time.
<B> By supporting the connecting girder from below using a carrier, the connecting girder can be conveyed with little bending. For this reason, the end faces can be easily aligned, and the connecting girder and the bridge girder can be quickly joined.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an embodiment of a method for connecting bridge girders of a ramen type bridge according to the present invention.
FIG. 2 is an explanatory view of an embodiment showing a state where a connecting girder is being sent out by a carrier.
FIG. 3 is an overall explanatory view of an embodiment showing a state in which a pick-up side bridge girder is moved to a connecting girder side.
FIG. 4 is a partial explanatory view of the embodiment showing a state in which a pick-up side bridge girder is moved to a connection girder side.
FIG. 5 is a perspective view of an embodiment in which a pier is arranged on the head of a substructure.
FIG. 6 is an explanatory view of an embodiment showing a state where a connecting girder is adjusted to the height of a sending-side bridge girder.
FIG. 7 is an explanatory view of an embodiment of a method of connecting between bridge girders of a conventional ramen type bridge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Connecting girder 2 ... Sending-side bridge girder 3 ... Greeting-side bridge girder 31 ... Pier 32 ... Temporary support base 33 ... Substructure 4 ... Carrier 41 ... Elevating platform

Claims (5)

In the method of connecting the bridge girders of a rigid-frame bridge in which the girder and the pier head are rigidly connected,
Construction of a delivery-side bridge girder for temporarily placing a connecting girder connecting the bridge girder, and a pick-up side bridge girder that can move the pier and the bridge girder together,
The connection girder projecting from the tip of the delivery-side bridge girder is sent out in the direction of the welcome-side bridge girder while being supported from below by a carrier with a lift platform,
Between the delivery-side bridge girder and the pick-up side bridge girder having a wider interval than the length of the connection girder, the connection girder transported by the carrier with the elevator platform is arranged,
The opposite end of the connecting girder and the end of the delivery-side bridge girder are joined,
Moving the welcome side bridge girder in the direction of the connecting girder together with the rigidly connected pier,
Joining opposite ends of the connecting girder and ends of the pick-up side bridge girder,
A method of connecting the bridge girders of a ramen-type bridge. The method of connecting between bridge girders of a rigid-frame bridge according to claim 1,
The pick-up side bridge girder is supported by a pier rigidly connected to the bridge girder and a temporary support slidably supporting the bridge girder until the end of the connecting girder and the end of the pick-up side girder are joined. Characterized by
A method of connecting the bridge girders of a ramen type bridge. A method for connecting between bridge girders of a rigid-frame bridge according to claim 1 or 2,
By using a plurality of transport vehicles with the lifting platform, characterized in that the connecting girder is transported in a state close to the stress state after connection,
A method of connecting the bridge girders of a ramen type bridge. A method for connecting between bridge girders of a rigid-frame bridge according to any one of claims 1 to 3,
The welcome side bridge girder is moved by sliding a pier on an upper surface of a substructure.
A method of connecting the bridge girders of a ramen type bridge. A method for connecting between bridge girders of a rigid-frame bridge according to any one of claims 1 to 4,
By adjusting the weight of the pick-up bridge girder projecting to the opposite side of the connecting girder, when the end of the connecting girder and the end of the pick-up bridge girder are joined, the pier rigidly connected to the pick-up girder is Characterized in that the lower part is prevented from moving in the direction opposite to the connecting girder,
A method of connecting the bridge girders of a ramen-type bridge.

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