JP3905099B2 - Hand girder delivery construction method for bridge girder - Google Patents

Description

  The present invention is a kind of bridge girder construction method, and there are roads, railways, rivers, etc. under the bridge girder to be built, and it is necessary to construct a bridge girder in a place where it is difficult to install a vent or to enter a truck crane. The present invention relates to a hand-drawn delivery construction method. In addition, in the delivery construction method according to the present invention, in addition to sending out the bridge girder by pushing it forward with a self-propelled carriage or horizontal jack, the carriage of the moving vent on which the bridge girder is placed is pulled with a winch through a wire. In addition, a pulling construction method in which the tip of the bridge girder is pulled with a winch through a wire is also included.

  This type of construction method is often used for bridge girder construction at intersections, for example, when it is necessary to minimize the impact on road traffic due to construction of intersections at intersections.

  As shown in FIG. 6, the conventional hand-drawn delivery method is constructed in such a way that bridge piers (or abutments) 7 and 8 are erected in advance on the planned location where the bridge girder 1 is to be installed with the road Y or river Y sandwiched between them. Up to 7.8 piers, a plurality of bridge girders (members) connected in series across a plurality of piers standing at predetermined intervals are installed. Between the piers, fixed vents 12 are installed at regular intervals to support the bridge girder in an auxiliary manner.

  On the existing bridge girder 17 on the side where the bridge girder 1 is to be delivered, a delivery facility 18 is installed, and a plurality of bridge girder (members) 1 connected in series to a length corresponding to the distance between the bridge piers 7 and 8 are predetermined. It mounts on a pair of trolley | bogies 15 and 16 arrange | positioned at a distance. A base end vertical surface of the hand spreader 5 is connected to a front end vertical surface of the leading bridge girder (member) 1 via a connecting structure 4 and a joint member 6 so as to project on a front extension line. Then, the bridge girder to be erected (hereinafter also referred to as erection bridge girder) 1 is sent out to the opposite pier 8 side, and when the handbill 5 reaches the existing bridge girder 9 on the opposite side, rollers are installed under the handbill 5. Then, the bridge girder is sent out with both ends supported. With the bridge girder installed between the bridge piers on both sides, the leading hand extender 5 is removed together with the connecting structure 4. Then, jacks (not shown) are provided on both sides of the erection bridge girder 1, the erection bridge girder 1 is lowered to the same height as the existing bridge girder 9, and both sides of the erection bridge girder 1 are connected. Finally, if the delivery equipment 18 and the fixed vent 12 are removed, the construction work is completed.

In another prior art, there is a lifting device that installs temporary girders that are wider than standing piers and have rotating rollers on the upper surface thereof at least at three locations in the pier erection direction, and lifts and moves the piers or temporary girders. Placing the provided garter on a rotating roller, laying the bridge girder with the lifting device between the piers, and lifting the last temporary girder with the lifting device and moving the garter in the erection direction There has been proposed a bridge girder construction method in which the suspended temporary girder is sequentially installed on the next pier in the erection direction (see, for example, Patent Document 1).
Japanese Patent Publication No. 3-78888 (Detailed Description of the Invention and FIGS. 1 to 3)

  However, the conventional hand-drawn delivery construction method and the bridge pier construction method described in the above publication have the following problems to be solved.

1) In the conventional construction method, as shown in Fig. 7, the hand spreader 5 is provided on the vertical surface of the end of the bridge girder 1 so as to project forward on the extension line, so that the receiving side (reach side) of the bridge girder 1 to be erected It was necessary to lower at least the height of the bridge girder 1 with respect to the existing bridge girder 9 (or the abutment 8) located at. This descent work is done using a jack etc., but there is a risk of falling, etc., so for example, in the case of erection at the intersection where there is a road under the bridge girder 1 to be erected, traffic regulation must be performed . Moreover, the handrail 5 must be removed before the bridge girder 1 is lowered. At this point, the bridge girder 1 to be installed has a step (see FIG. 6) with respect to the existing bridge girder 9. It is difficult to connect immediately. For this reason, the bridge girder 1 is usually lowered after the handrail 5 is removed. Further, the removal of the handbill 5 is performed in an unstable state in which the bridge girder 1 is not connected, which is dangerous and requires skill in the work. Furthermore, in addition to the work of lowering the bridge girder 1, it is necessary to regulate traffic when installing the bridge girder 1 together with the spreader 5 on the intersection, and this work must be performed before the above work. Because it will be done, the traffic regulation will be done twice after a few days.

  2) In the construction method described in the above publication, since the garter is moved on the existing bridge girder, there are restrictions on the width of roads and rivers that can be implemented, for example, the width of the intersection is wide (the distance between the erections is long) In some cases, implementation is difficult.

  The present invention has been made in view of the above points, and is applied to a construction work where there is a road, a railway, a river, etc. under the bridge girder of the construction point and it is difficult to install a support work or to enter a crane. It is possible to eliminate the work of descending the bridge girder after sending out the bridge girder, and to provide a bridge girder delivery construction method that can significantly reduce the traffic regulation time under the bridge girder, especially in the construction work at the intersection.

In order to achieve the above object, the hand girder delivery construction method for a bridge girder according to the present invention includes: a) standing a bridge pier facing each other across a planned construction point of the bridge girder, and one of the pair of piers. Supports or piers are erected on the side of the bridge pier behind the pier, and a fixed-length bridge girder (member) is installed in series on the support or over the pier. delivery by connecting a hand total machine top girder to be newly laid from pier side, the hand total formula feeding erection method of bridge beam which spans the bridge girder between the pair of piers, b) on both sides at the tip of the head of the bridge girder The joints are respectively connected to the abdominal plate and extended upward, and the lower ends of both side plates of the connecting structure are connected to the joints on both sides by a joint member, and the above-mentioned hands are extended to the vertical edges on both ends of the connecting structure. Connect the vertical edges on both sides of the base end of the machine with a joint member in a butted state. , Projecting the hand extender forward from the top of the leading end of the bridge girder through the connecting structure, and standing up a support or bridge pier with a gap extending backward from the pier on the side where a new bridge girder is sent out. The bridge girder of a certain length is connected in series to the rear side over the support or the bridge pier, and c) a carriage in which the bridge girder connected in series is directly or indirectly installed on the support or the pier, Rollers, rollers, non-friction plates, etc. are supported so that they can move forward, and the front bridge girder equipped with the above-mentioned handrailing machine reaches the existing bridge girder on the opposite pier, so that both bridge girder vertical surfaces are D) Remove the handrail from the top bridge girder,
Alternatively, as described in claim 2, 1) erected piers facing each other across the planned construction point of the bridge girder, and 2) spaced apart from the pier on the side where the bridge girder is sent out of the pair of piers. Supports or bridge piers are erected. 3) After installing rail facilities (rail facilities are examples of sending out facilities) over those supports or bridge piers, a fixed-length bridge girder will be built on the rail facilities. (Members) are sequentially connected in series rearward, and at the tip of the leading bridge girder, joints are respectively connected to the abdominal plates on both sides and extended upward, and the lower ends of both side plates of the coupling structure on the joints on both sides. The joint is connected by a joint member, and the vertical edges on both sides of the connecting structure are connected to the vertical edges on both sides by the joint member in a butted state, and the leading end of the leading bridge girder via the connection structure. while Ru allowed overhang hand caster forward than the upper, 4) girders rack of Supporters or piers are erected at intervals from the opposite pier across the planned point, and a fixed-length bridge girder (member) is connected in series across the supporter or pier. 5) Sending out the bridge girder forward via a carriage capable of traveling the rail equipment, both in the state where the leading bridge girder with the handrail reached the existing bridge girder on the opposite pier After the vertical surfaces of the bridge girders are butted and connected, 6) the handrail machine is removed from the leading bridge girder.

According to the bridge girder manual delivery construction method of the present invention (Claim 1 or Claim 2) having the above-described configuration, the bridge girder is provided above the first bridge girder. Can be sent out at the same height, and the work of lowering the bridge girder after sending out becomes unnecessary. In addition, it is necessary to remove the handrail before the bridge girder is lowered. However, according to the construction method of the present invention, there is no difference in height (step) between the bridge girder to be installed and the existing bridge girder connecting the bridge girder. Since the handrail is connected to the upper side of the bridge girder, both bridge girders can be abutted and connected without removing the handrail. Therefore, traffic control only needs to be performed when the bridge girder is sent out, especially during the construction work at the intersection, so that traffic troubles can be minimized and traffic control time can be greatly shortened. Can do. In addition, a bridge girder (member) of a certain length is sent out while being sequentially connected to the rear end each time the bridge girder is sent out. Since a long bridge girder can be formed, connection work can be performed efficiently. Furthermore, the handrailer is connected by placing a connecting structure on the leading edge of the leading bridge girder, and then projecting forward on the vertical surface of the connecting structure so that it can be removed. The connection structure can be removed and removed, or the connection mechanism can be removed from the bridge girder after removing the handrail from the tip of the connection structure, and the removal method can be selected according to the work situation. It is economical because it can be used repeatedly regardless of the length of the handrail.

The gate structure is erected on the pier that is erected with a space behind the leading pier on the side where the bridge girder is sent out as defined in claim 3, An uplift stop roller can be suspended downward, and the rear side of the bridge girder connected in series to the rear of the bridge girder to be installed can be brought into contact with and supported by the uplift stop roller .

According to the handed-out delivery construction method of the bridge girder according to claim 3, the rear side of the bridge girder that is to be erected is brought into contact with and supported by the uplift stop roller, and the rear side of the bridge girder is lifted up. This is also effective when there is no wide space behind the sending-out bridge girder and the bridge girder cannot be connected long enough.

The handrail-type delivery construction method of the bridge girder according to the present invention is a state in which the handrail is extended forward by connecting the base end portion of the handrail through the connecting structure to the upper end of the top bridge girder to be erected. Therefore, the bridge girder is sent out on the opposite pier with the installation point in between, so that the bridge girder can be sent out at the same height as the installation completion state, and the descent work of the bridge girder after sending out becomes unnecessary. In addition, the removal of the handrail can be performed slowly after the bridge girder is sent out, so that the removal work becomes easier and the construction work time (days) is greatly shortened. In that case, the traffic regulation only needs to be performed at the time of sending out the bridge girder, and the traffic regulation time becomes extremely short compared with the conventional delivery construction method.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a bridge girder hand-out delivery construction method according to the present invention will be described with reference to the drawings.

  1 (a) to 1 (c) are side views sequentially showing the procedure of the hand-drawn delivery construction method according to the first embodiment of the present invention, and FIG. 2 is a hand-drawing method used in the hand-feeding delivery construction method of the present invention. The side view which abbreviate | omitted and shown a part which shows an example of the connection state of a machine and a bridge girder, FIG. 3 is AA arrow sectional drawing of FIG.

As shown in FIG. 1, the handbill 5 according to the present invention is connected to the bridge girder 1 to be erected from the upper end of the bridge. The bridge girder 1 is formed by sequentially connecting a plurality of fixed-length bridge girders (hereinafter referred to as bridge girder members) 1A to 1H in series in the longitudinal direction, and as shown in FIG. 2, the top surface of the front end of the leading bridge girder member 1A. For example, a pentagonal connecting structure 2 is attached when viewed from the side, and the lower end of the rectangular plate-like joint 3 is formed at the upper end of the abdomen 1b on both sides in advance at the front end of the bridge girder member 1A. Are connected together by welding. Then, with the lower ends of the two side plates of the coupling structure 2 placed on the upper ends of the joints 3 on both sides as shown in FIG. The bolt joint 6 is composed of a pair of rectangular plates having a large number of bolt through holes (not shown) and bolts and nuts, and the bolt through holes of the bolt joint 6 at the upper portion of the joint 3 and the lower portions of both side plates of the coupling structure 2. A through hole (not shown) is provided at a position corresponding to, and the side plates of the connection 3 and the connection structure 2 are sandwiched from both sides by a pair of bolt joints 6 across the connection 3 and the connection structure 2. A nut (not shown) is screwed into a threaded portion of a large number of bolts 6a that pass through the bolt 6a, and are coupled together. Similarly, it is integrally connected by the bolt joint 6 in a state where the base end vertical end of the hand extender 5 is abutted with the end vertical end of the connecting structure 2. The joint member is not limited to the bolt joint 6, and for example, a welded joint can be used.

  As shown in FIG. 1, the present embodiment is a construction method applied when an intersection bridge is constructed across an orthogonal road X at an intersection, and piers 7 and 8 are erected on both sides of the road X. . The bridge girder 1 to be erected is sent forward (left side) from the left pier 7 in FIG. 1 and connected to the existing bridge girder 9 on the right pier 8. This existing bridge girder 9 is installed over a plurality of piers (not shown) standing on the right side with a certain distance from the piers 8 and is also a fixed vent as a support work erected between the piers. 10 is also supported.

  On the other hand, the bridge girder 1 to be constructed has a plurality of fixed vents between the pier 7 and the pier 11 standing at a certain distance from the pier 7 and between the pier 11 and other piers (not shown). In this example, as the delivery equipment installed on the fixed vent 12, the carriage 15 mounted on the tip side of the rail equipment 13 is movably mounted. Supported through. In this state, the bridge girder 1 is located above the piers 7 and 11 and is not directly supported. Further, the hand-rolling machine 5 at the tip projects above the road X ahead of the bridge pier 7 (FIG. 1A).

  The bridge girder 1 is slowly fed forward by the movement of the carriage 15, and accordingly, the bridge girder members 1I to 1K having a certain length are sequentially connected to the bridge girder member 1H at the rear end of the bridge girder 1. In addition, the connection operation | work of the bridge girder members 1I-1K can be performed by lifting with the truck crane 21, for example, as shown in FIG. Further, in this state, the bridge girder 1 is supported on the pier 7 at the tip, the carriage 15 returns to the original position on the rear side of the rail equipment 13, and another carriage 16 is placed on the rail equipment 14 so as to be able to travel. The rear end side of the bridge girder 1 is supported. Thus, with the movement of the two carriages 15 and 16 capable of traveling on the rail facilities 13 and 14, the leading end of the hand-drawing machine 5 is sent forward and the existing bridge pier 8 across the road X is installed. The tip of the bridge girder 9 is reached (FIG. 1 (b)).

  The bridge girder 1 is sent further forward with the movement of the carriages 15 and 16, and bridge girder members 1 </ b> L to 1 </ b> P having a certain length are sequentially connected to the rear end of the bridge girder 1. Thus, the tip of the first bridge girder member 1A is abutted against and connected to the tip of the existing bridge girder 9. In this state, the bridge girder 1 is installed and supported on the piers 7 and 11 (FIG. 1 (c)). The handrail 5 is still connected to the first bridge girder member 1A and is located on the existing bridge girder 9, but the bridge girder 1 is already connected integrally with the existing bridge girder 9, so it differs from the conventional construction method. There is no need to regulate road X traffic. Of course, the conventional descent work of the bridge girder 1 is unnecessary and can be omitted, and the removal work of the handrail 5 can be performed slowly on the existing bridge girder 9 and of course there is no need for traffic regulation.

  4 and 5 are drawings showing a hand-drawn delivery construction method according to the second embodiment, FIG. 4 is a side view, and FIG. 5 is a cross-sectional view taken along line BB in FIG. .

The construction method of the present embodiment is different from that of the first embodiment in that the gate structure 22 is erected on the pier 11 erected on the rear side of the end pier 7 as shown in FIG. A pair of uplift stop rollers 23 and 23 are suspended below the upper horizontal portion 22a to prevent the rear side of the bridge girder 1 to be erected from being lifted up. This example is effective when there is no wide space behind the bridge girder 1 on the sending side and the bridge girder 1 cannot be connected sufficiently long. Since the other configuration and the construction method are the same as those in the first embodiment, the common components are shown in the drawings using the same reference numerals, and the description thereof is omitted.

  Two examples of the construction method of the present invention have been described above, but the present invention can also be implemented as follows.

  1. A bridge, a roller, a roller, a non-friction plate, etc. can be installed on a support such as a bridge pier or a fixed vent without providing the rail facilities 13 and 14, and the bridge girder 1 can be sent out by a horizontal jack.

  2. Instead of using the carriages 15 and 16, the bridge girder 1 may be installed over a plurality of movement vents provided with the carriages, and the movement vents may be pulled by a winch with a wire and sent out.

  3. Above 1. The tip of the bridge beam 1 may be pulled out by a winch with a wire and sent out.

1 (a) to 1 (c) are side views sequentially showing the procedure of a hand-drawn delivery construction method according to Embodiment 1 of the present invention. It is the side view which abbreviate | omitted and shown an example which shows an example of the connection state of the handrail machine and bridge girder used for the handroll type delivery construction method of this invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a side view which shows the hand delivery type delivery construction method which concerns on Example 2 of this invention. 4 is an enlarged cross-sectional view taken along line B-B in FIG. It is a side view which shows the conventional general hand-drawn delivery construction method. It is a side view which expands and shows the bridge | girder front-end | tip part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bridge girder 1A-1P bridge girder member 1b stomach plate 2 Connection structure 3 Joint 5 Hand extender 6 Bolt joint (joint member)
6a bolt 7 ・ 8 ・ 11 Pier 9 Existing bridge girder 10 ・ 12 Fixed vent 13 ・ 14 Rail equipment (feeding equipment)
15.16 trolley 21 crane 22 gate structure 23 Laura X road (intersection)

Claims (3)

Establish piers that face each other across the planned construction point of the bridge girder, and set up a support pier or pier on one pier side of the pair of piers with a gap from the pier to the rear, and on those support works. Alternatively, a bridge girder of a certain length spans over the bridge pier and is connected in series in the rear, and a bridge girder newly constructed from the other pier side is connected and sent out, and the bridge girder is connected between the pair of bridge piers. In the handed-out delivery construction method of the bridge girder
At the leading end of the leading bridge girder, the joints are connected and extended upward on the abdominal plates on both sides, and the lower ends of both side plates of the connecting structure are connected to the joints on both sides with joint members. Connect the vertical edges of both sides of the handrail to the vertical edges on both sides of the leading edge with a joint member in abutment, and project the handwheel to the front from the top of the leading end of the bridge girder through the connecting structure. A support work or a bridge pier is erected at a distance from the pier on the side where the bridge girder is sent out, and a fixed length bridge girder is serially connected to the rear of the support work or the bridge pier in series.
The bridge girder connected in series is movably supported by a carriage, roller, roller, non-friction plate, etc. installed directly or indirectly on the support or on the bridge pier, and is fed forward, and includes the handrail The bridge girder is characterized in that after the first bridge girder reaches the existing bridge girder on the opposite pier, the vertical surfaces of both bridge girder are connected to each other, and then the handrail is removed from the first bridge girder. Total delivery construction method. Establishing opposite piers across the planned construction point of the bridge girder,
A support or bridge pier is erected at a distance from the pier on the side where the bridge girder is sent out of the pair of bridge piers, and after installing the rail equipment on the support or on the bridge pier, At the tip of the top bridge girder, the bridges of a certain length planned to be installed are connected sequentially in series, and the joints are connected to the abdomen on both sides and extended upward, and connected to the joints on both sides. The lower end portions of both side plates of the structure are connected by a joint member, and the vertical edges on both ends of the jointing machine are connected to the vertical edges on both ends by the joint member in a state of abutting with each other. while the beginning of the bridge girder tip upper Ru allowed overhang hand total machine forward,
Supporters or piers are erected at intervals behind the opposite piers across the planned construction point of the bridge girder, and bridges of a certain length are connected in series rearwardly on those supports or on the piers. Installed,
The bridge girder is fed forward through a carriage that can travel the rail facility, and both bridge girder vertical surfaces are brought into contact with each other with the leading bridge girder equipped with the handrail reaching the existing bridge girder on the opposite pier. And then connecting the bridge girder from the top bridge girder. A gate structure is erected on the pier that is erected at a distance from the head pier on the side where the bridge girder is sent out, and a pair of uplift stopper rollers are suspended below the upper horizontal portion of the gate structure. It was set, according to claim 1 or 2 girders hand total formula wherein the supporting child rear side of the girder which is connected in series to the rear of the bridge girder erection schedule is brought into contact with the uplift stop roller Sending construction method.

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