JP2019116730A - Steel bridge widening installation device and steel bridge widening installation method - Google Patents

Abstract

To enable the widening work of an existing steel bridge without using a bent and with one lane regulation.SOLUTION: A hanging frame 12 to be arranged in a prescribed position by lifting and hanging a widening member 82, and a receiving cross beam 14 attached to an existing girder 102 of an existing steel bridge 100 so as to project to the side where the widening work is performed are provided; the hanging frame 12 has a frame part 16 forming a skeleton thereof, and lifting and hanging means 70 which performs lifting and hanging of the widening member 82 and which is movable in a direction perpendicular to the bridge axis; the frame part 16 has leg parts 20 and 22 extending substantially in a vertical direction, and a beam part 24 extending in a substantially perpendicular direction to the bridge axis; the beam part 24 is a ceiling part of the frame part 16; the first leg part 20 is supported by the receiving cross beam 14; and the second leg part 22 is supported by a portion of the existing steel bridge 100 on the side where the widening work is performed outside the existing steel bridge 100 in the direction perpendicular to the bridge axis from the roadway of the existing steel bridge 100.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a steel bridge widening installation device and a steel bridge widening construction method, and in particular, a steel bridge widening construction device which enables widening work of an existing steel bridge without using a vent and one-lane regulation. It relates to steel bridge widening construction method.

  When widening the existing steel bridge, at present, a vent is constructed below the widening space, and the constructed vent supports the member used for widening (hereinafter, may be referred to as a widening member) and performs construction. (See, for example, Non-Patent Documents 1 and 2).

  When arranging the widening member at a predetermined position in the construction, a crane is arranged on the side of the existing steel bridge to be constructed, and the widening member is often lifted by the crane and arranged at a predetermined position. (See, for example, Non-Patent Documents 1 and 2). Also, a crane is often arranged on the road surface of the existing steel bridge to be constructed, and the widening member is often lifted by the crane and arranged at a predetermined position. (See, for example, Non-Patent Document 2).

  However, depending on the surrounding environment of the existing steel bridge to be constructed, there are cases where it may be difficult to construct a vent or when the vent can be installed.

  In addition, when carrying out construction by lifting the widening member with a crane arranged on the road surface of the existing steel bridge to be constructed, a 50t class crane is required, so two lanes need to be restricted, which greatly affects traffic. Become.

Takuya Shin Oda, Hideki Arimura, "General National Route No. 1 Fujieda BP Extended steel girder construction and reinforcement of existing steel girder," Komai Hallek Tech, Kokai Hallek Co., Ltd., October 2012, Vol. 2, p. 76-79 Umemoto Kiku, Sasaki Ryuta, Ohara Yosuke, "Design of 3-lane widening construction of truss bridge-Chuo Expressway Ohara Daini Bridge-", Miyaji Technical Report, Miyaji Engineering Co., Ltd., March 2004, No. 19, p .52-58

  The present invention has been made in view of such a situation, and provides a steel bridge widening installation device and a steel bridge widening construction method that enables widening work of an existing steel bridge with one lane regulation without using a vent. To be a task.

  The present invention solves the above problems by the following steel bridge widening installation device and steel bridge widening construction method.

  That is, the steel bridge widening installation apparatus according to the present invention is a steel bridge widening installation apparatus used for widening construction of an existing steel bridge, and performs lifting and suspending of the widening member used for widening the existing steel bridge. A suspension frame disposed at a position, and a receiving cross beam attached to an existing girder of the existing steel bridge so as to project from the existing steel bridge to the side where the widening work is performed, the suspension frame having its frame A frame portion, and lifting and lowering means for lifting and suspending the widening member and movable in the direction perpendicular to the bridge axis of the existing steel bridge, the frame portion having a substantially vertically extending leg portion The beam portion extends in a direction substantially perpendicular to the bridge axis, and the beam portion is a ceiling portion of the frame portion, and is a first leg portion of the leg portion which is a side far from the existing steel bridge. Legs are supported on the receiving cross beam The second leg, which is the leg on the side closer to the existing steel bridge, is the side on which the widening work is performed outside the existing steel bridge in the direction perpendicular to the bridge axis than the roadway of the existing steel bridge. It is supported by the site | part of the said existing steel bridge, It is a steel bridge widening installation apparatus characterized by the above-mentioned.

  Here, "supported by the receiving cross beam" is a concept including not only when directly supported by the receiving cross beam but also when supported by the receiving cross beam via another member. "The side of the existing steel bridge is supported by the site of the existing steel bridge on the side where the widening work is performed on the outside of the existing steel bridge in the direction perpendicular to the bridge axis of the existing steel bridge" Not only when the existing steel bridge is directly supported by the site of the existing steel bridge on the side where the widening work is performed outside in the direction perpendicular to the bridge axis of the existing steel bridge, but the existing steel bridge is more than the roadway of the existing steel bridge. It is a concept including the case where it is supported via the other member at the site of the existing steel bridge on the side of performing the widening work on the outside in the direction perpendicular to the bridge axis. Hereinafter, in the present application, the same description is to be interpreted in the same manner as the above description.

  Further, in the present application, the term "roadway" refers to a portion of a road that is constituted by lanes and is intended to be used exclusively for the passage of vehicles.

  As a part of the existing steel bridge on the side where the widening work is performed on the outer side of the existing steel bridge in the direction perpendicular to the bridge axis of the existing steel bridge, specifically, for example, the widening work of the existing steel bridge You can list the shoulders on the side of doing.

  The suspension frame further includes moving means for moving in the bridge axial direction of the existing steel bridge in the first leg and the second leg, and the first leg is the existing It is supported by the receiving cross beam so as to be movable in the axial direction of the steel bridge, and the second leg portion is movable relative to the roadway of the existing steel bridge so as to be movable in the axial direction of the existing steel bridge. You may comprise so that it may be supported by the site | part of the said existing steel bridge of the side which performs the said widening work on the outer side in the bridge shaft right angle direction of the said existing steel bridge.

  Here, "is supported by the receiving cross beam so as to be movable in the bridge axial direction of the existing steel bridge" means that it is directly supported by the receiving cross beam so as to be movable in the bridge axial direction of the existing steel bridge. It is a concept that includes not only the case where the existing steel bridge is supported, but also the case where it is supported by the receiving cross beam via another member so as to be movable in the bridge axial direction of the existing steel bridge. It is supported by the site of the existing steel bridge on the side where the widening work is performed outside the existing steel bridge in the direction perpendicular to the shaft axis of the existing steel bridge so as to be movable in the axial direction. Directly supported on the existing steel bridge at the side where the widening work is to be performed outside the existing steel bridge's roadway perpendicular to the existing steel bridge's roadway so as to be movable in the bridge axial direction of the existing steel bridge Not only if it is installed, but also if it can be moved in the bridge axial direction of the existing steel bridge When supported via other members at the site of the existing steel bridge side to perform the widening work outside the bridge axis perpendicular direction of the existing steel bridges than the roadway of the bridge is a concept including. Hereinafter, in the present application, the same description is to be interpreted in the same manner as the above description.

  The first rail provided on the receiving cross beam and the site of the existing steel bridge on the side where the widening work is to be performed outside the existing steel bridge in the direction perpendicular to the bridge axis than the roadway of the existing steel bridge And a second rail, wherein the first rail and the second rail both extend substantially in the axial direction of the existing steel bridge, and the first leg is a portion of the existing steel bridge. It is supported by the first rail so as to be movable in the bridge axial direction, and the second leg is supported by the second rail so as to be movable in the bridge axial direction of the existing steel bridge. It may be configured as follows.

  The suspension system further comprises a first traction device attached to the first rail and a second traction device attached to the second rail, the suspension frame comprising the first traction device and the second traction device. It may be constituted so that it can move in the direction of the bridge axis of the existing steel bridge by being pulled by a pulling device of

  The lifting and lowering means may be configured to be attached to the frame portion so as to be movable in the direction perpendicular to the bridge axis of the existing steel bridge.

  Here, "attached to the frame portion" is a concept including not only when directly attached to the frame portion but also when attached to the frame portion through other members. . Hereinafter, in the present application, the same description is to be interpreted in the same manner as the above description.

  The frame portion is provided with a movable beam capable of projecting to the lane side of the existing steel bridge and pulling back thereof, and the lifting and lowering means can move the movable beam in the longitudinal direction of the movable beam. It may be configured to be attached to

  Here, "mounted so as to be movable in the longitudinal direction of the movable beam" means not only when directly attached so as to be movable in the longitudinal direction of the movable beam, but also other members. This concept also includes the case where the movable beam is attached so as to be movable in the longitudinal direction of the movable beam. Hereinafter, in the present application, the same description is to be interpreted in the same manner as the above description.

  A first aspect of the steel bridge widening construction method according to the present invention is a steel bridge widening construction method performed using the steel bridge widening construction device, and the widening member used to widen the existing steel bridge by the lifting and lowering means A steel bridge widening construction method characterized by comprising: an arranging step of arranging at a predetermined position; and a connecting step of connecting the widening member arranged at the predetermined position in the arranging step to the existing steel bridge is there.

  Here, "connecting to the existing steel bridge" is a concept including not only connecting directly to the existing steel bridge, but also connecting to the existing steel bridge via another member. Hereinafter, in the present application, the same description is to be interpreted in the same manner as the above description.

  The second aspect of the steel bridge widening construction method according to the present invention is a steel bridge widening construction method performed using the steel bridge widening construction device, and the widening of the existing steel bridge by the moving means and the lifting and lowering means Steel bridge comprising: an arranging step of arranging a widening member used for the first place; and a connecting step of connecting the widening member arranged at the predetermined position in the arranging step to the existing steel bridge It is a widening construction method.

  According to the steel bridge widening installation device and the steel bridge widening construction method according to the present invention, it is possible to perform the widening work of the existing steel bridge without using a vent and by one-lane regulation.

It is a cross-sectional view which shows the state before and behind the widening construction of the existing steel bridge 100 which applies a steel bridge widening construction apparatus and a steel bridge widening construction method concerning an embodiment of the present invention, (A) is a widening construction of the existing steel bridge 100 The cross-sectional view which shows a front state, (B) is a cross-sectional view which shows the state (widening steel bridge 200) after performing the widening work to the existing steel bridge 100. It is the front view which expands and shows the main widening member 82 used for this widening construction, and (A) is the front view which looked at the state where the main widening member 82 was connected and was assembled from the bridge axial direction, (B) , An exploded front view of the main widening member 82 before assembly as viewed from the bridge axial direction The perspective view which looked at the situation which is performing widening construction using steel bridge widening construction equipment 10 concerning the embodiment of the present invention from the main line side of existing steel bridge 100. The perspective view which looked at the situation which is performing the widening construction using the steel bridge widening construction device 10 concerning the embodiment of the present invention from the side which is performing the widening construction. The front view which looked at the steel bridge widening construction device 10 concerning the embodiment of the present invention from the bridge shaft direction The side view which looked at the steel bridge widening construction device 10 concerning the embodiment of the present invention from the bridge axis right angle direction of the widening construction side (the side opposite to the main line) bridge The front view which shows typically the condition which is carrying out the arrangement | positioning operation | work of the extension main girder 86 using the steel-bridge widening construction apparatus 10 which concerns on embodiment of this invention It is the front view which looked at steel bridge widening construction equipment 10 concerning the embodiment of the present invention, and the existing steel bridge 100 from the direction of a bridge axis, and (A) performs 1 lane regulation and performs widening construction. (B) is a front view schematically showing the arrangement of the movable cross beam 50 when the traffic is released by releasing the lane regulation. Cross section of cross section of movable cross beam 50 cut in orthogonal planes Front view showing the installation of the extension main girder 86 using the steel bridge widening installation device 10 (front view of the stage at which the extension main girder 86 is lifted from the track 300) Front view showing the installation of the extension main girder 86 using the steel bridge widening installation device 10 (front view of a stage where the extension main girder 86 is suspended slightly downward at a predetermined position) Front view showing the installation of the extension main girder 86 using the steel bridge widening installation device 10 (front view of the stage where the extension main girder 86 is disposed at a predetermined position on the side of the extension horizontal girder 84) Front view showing the installation of the extension main girder 86 using the steel bridge widening installation device 10 (a front view of a stage where connection of the extension main girder 86 to the extension lateral girder 84 is completed)

  Hereinafter, with reference to the drawings, a steel bridge widening installation device and a steel bridge widening construction method according to an embodiment of the present invention will be described in detail.

(1) Application target example of this embodiment FIG. 1 is a cross-sectional view showing a state before and after a widening work of an existing steel bridge 100 to which a steel bridge widening erection installation device and a steel bridge widening erection method according to an embodiment of the present invention are applied. 1 (A) is a cross-sectional view showing the state of the existing steel bridge 100 before the widening work, and FIG. 1 (B) is a state after the existing steel bridge 100 is subjected to the widening work (widening steel bridge 200) is a cross-sectional view. In the present application, a bridge after the existing steel bridge 100 has been subjected to a widening work will be referred to as a widening steel bridge 200.

  The existing steel bridge 100 to which the present embodiment is applied is provided with box girders 102 and 104 at both ends in the direction perpendicular to the bridge axis, and a longitudinal girder 106 at the center in the direction perpendicular to the bridge axis. There is. Vertical lines indicated by reference numerals G1 and G3 in FIGS. 1A and 1B indicate intermediate positions of two webs provided in the box girders 102 and 104, respectively. A vertical line indicated by reference sign G2 indicates the position of the web of the stringer 106. A vertical line indicated by reference numeral G0 in FIG. 1B indicates the position of the web of the extension main girder 86 (see FIG. 2). Further, reference numerals 102A and 104A denote webs forming the outer side surfaces of the box girder 102 and 104, and reference numerals 102B and 104B denote diaphragms provided inside the box girder 102 and 104.

  FIG. 2 is an enlarged front view showing a main widening member 82 used for the widening work. FIG. 2A is a front view of a state where the main widening members 82 are connected and assembled as viewed from the bridge axial direction. FIG. 2 (B) is an exploded front view of the main widening member 82 before assembly as viewed from the bridge axial direction.

  In the following, the widening work for widening the existing steel bridge 100 with three lanes shown in FIG. 1A to the wide steel bridge 200 with four lanes shown in FIG. 1B according to the embodiment of the present invention The case of applying a steel bridge widening installation device and a steel bridge widening construction method will be described.

  Specifically, the area expanded by this work is the expanded area 80 shown in FIG. 1B, and may be mainly described as a main expanding member 82 disposed in the expanded area 80 (hereinafter simply referred to as the expanding member 82) 2), as shown in FIGS. 2 (A) and 2 (B), consists of an extension horizontal girder 84, an extension main girder 86, an extension girder 88, and an in-floor plate 90, and these members are The steel bridge widening installation device and the steel bridge widening construction method according to the embodiment of the present invention can be constructed only by regulating one lane. On the other hand, when placing the extension main girder 86 and the mid-floor version 90 with a crane arranged on the road surface, the 25-t crane is used because the additional main girder 86 and mid-floor version 90 are heavy. It will be necessary to regulate two lanes.

(2) Configuration of steel bridge widening installation device according to the embodiment of the present invention FIG. 3 shows the situation where the widening work is performed using the steel bridge widening construction device 10 according to the embodiment of the present invention It is the perspective view seen from the main line side. FIG. 4 is a perspective view of a situation in which a widening work is performed using the steel bridge widening installation device 10 according to the embodiment of the present invention as viewed from the side where the widening work is performed. In the specification of the present application, "the side performing the widening work" may be referred to as the "widening work side". Moreover, in the specification of the present application, the main line of the existing steel bridge 100 may be simply referred to as a "main line".

  As shown in FIG. 3 and FIG. 4, the existing steel bridge 100 which is the target of performing the widening work using the steel bridge widening installation device 10 according to the embodiment of the present invention is provided along the river 400. The steel bridge to which the steel bridge widening installation device according to the present invention can be applied is not limited to this, and the steel bridge widening construction device according to the present invention is a mountain bridge or an urban area if the target bridge is a steel bridge. It can be widely applied to steel bridges in general including bridges, overpasses, overpasses, etc. Here, a construction in which the existing steel bridge 100 is widened by one lane on the left side (the river 400 side) in the vehicle traveling direction will be described as an example.

  FIG. 5 is a front view of the steel bridge widening installation device 10 according to the embodiment of the present invention as viewed from the bridge axis direction. FIG. 6 is a side of the steel bridge widening installation device 10 according to the embodiment of the present invention. It is the side view seen from the bridge shaft right angle direction (opposite to the main line). FIG. 5 shows the steel bridge widening installation device 10 lifting the extension main girder 86 from the track 300.

  FIG. 7: is a front view which shows typically the condition which is carrying out the arrangement | positioning operation | work of the extension main girder 86 using the steel-bridge widening construction apparatus 10 which concerns on embodiment of this invention. As shown in FIG. 7, among the three lanes of the existing steel bridge 100, only one lane on the side of the widening work is restricted for construction use, and the arrangement of the main widening members 82 (the extension main girder 86 in FIG. 7). Work can be done, and two of the three lanes can continue to be used even during work on widening work. FIG. 7 schematically shows the situation in which the vehicles 302 and 304 are traveling in the remaining two lanes of the three lanes except the one lane on the side of the widening work which is regulated for use in construction. In addition, in FIG. 7, the 2nd leg 22 and the reinforcement cross beam 26 are described with the broken line on account of illustration.

  The steel bridge widening installation device 10 according to the present embodiment, as shown in FIGS. 5 and 6, includes a suspension frame 12 and a receiving cross beam 14.

  The receiving cross beam 14 is a steel beam member for supporting the first leg 20 of the suspension frame 12 from below, and the widening work side (FIG. 3 and FIG. 3 and FIG. In FIG. 4, it is attached to the lower surface of the box girder 102 of the existing steel bridge 100 so as to project to the river 400 side). The arrangement position of the receiving cross beam 14 in the bridge axial direction is a position corresponding to the arrangement position of the diaphragm 102B provided inside the box girder 102. The attachment of the receiving cross beam 14 to the lower surface of the box girder 102 can be performed by mechanical joining means such as bolts.

  The suspension frame 12 comprises a frame portion 16 forming its frame, a lifting and lifting means 70 for lifting and suspending the widening member 82 and being movable in a direction perpendicular to the bridge axis of the existing steel bridge 100; Moving means 40 and second moving means 42).

  The frame portion 16 is a portion that forms the entire framework of the suspension frame 12 and includes the first leg 20, the second leg 22, the ceiling cross beam 24, the reinforcing cross beam 26, and the longitudinal beams 28, 30, 32 and 34, braces 36 and 38, and a movable cross beam 50, all of which are made of steel. However, materials other than steel can also be used as long as they meet the required performance. Further, each of the members constituting the frame portion 16 does not have to be constituted by a single member, and a plurality of members may be connected appropriately (for example, connection means for connecting with a bolt via a support plate) It is possible to use members having a necessary length by connecting them.

  When the frame portion 16 is viewed in the bridge axial direction, as shown in FIG. 5, a rectangle is formed by the first leg portion 20, the second leg portion 22, the ceiling cross beam 24, and the reinforcing cross beam 26. The lower part of the first leg 20 and the lower part of the second leg 22 project downward from the lower side of the formed rectangle.

  The first leg portion 20 is a leg portion located on the side of the widening work (opposite to the main line), and extends substantially in the vertical direction. A first moving means 40 is provided at the lower end portion of the first leg portion 20, and the first leg portion 20 is an end portion 14A of the receiving cross beam 14 on the side of widening work (side opposite to main line). It is disposed via a first moving means 40 on a first rail 44 provided at the top.

  The second leg 22 is a leg located on the main line side and extends in a substantially vertical direction. A second moving means 42 is provided at the lower end of the second leg 22, and the second leg 22 is a second provided on the shoulder of the existing steel bridge 100 on the side of the widening work of the existing steel bridge 100. The second moving means 42 is disposed on the rail 46 of the second embodiment.

  Since the first track 44 is located at a lower height than the second track 46 as shown in FIG. 5, the first leg 20 is moved by the second leg by the difference in height. Is longer than the legs 22 of the lower part, and the downward projecting length is longer.

  The second leg portion 22 and the reinforcing cross beam 26 are provided only at both ends in the bridge axial direction of the frame portion 16 of the suspension frame 12 as shown in FIG. 3, FIG. 4 and FIG. It is not provided in the bridge axial direction middle part (a part other than the bridge axial direction both ends). This allows the widening member 82 to pass from the roadside of the existing steel bridge 100 through the side portion on the main line side of the frame portion 16 to be fed into the inside of the frame portion 16 so as not to interfere when placing in the predetermined position. In order to

  A plurality of ceiling cross beams 24 are arranged at predetermined intervals in the bridge axis direction such that the longitudinal direction is substantially perpendicular to the bridge axis, and the ceiling cross beams 24 disposed at both ends in the bridge axis direction of the frame portion 16 are The both end portions are respectively connected to the upper end portions of the first leg 20 and the second leg 22 adjacent in the direction substantially perpendicular to the bridge axis. The ceiling cross beam 24 arranged at the bridge axial direction middle part (a part other than the bridge shaft direction both ends) of the frame portion 16 has the top vertical beam 28 (FIG. Are linked to each other).

  The reinforcing cross beams 26 are provided at both ends of the frame portion 16 of the suspension frame 12 in the bridge axial direction at a height of about 1 m from the road surface of the existing steel bridge 100 so that the longitudinal direction is substantially perpendicular to the bridge axis. , Is provided. The reinforcing cross beam 26 is not provided at a bridge axial direction middle portion (a portion other than both bridge axial direction ends) of the frame portion 16. This is to prevent interference when the widening member 82 fed into the inside of the frame portion 16 is disposed at a predetermined position. The reinforcing cross beam 26 is a reinforcing member for supplementing the strength and rigidity of the frame portion 16, and may be omitted if the strength and rigidity of the frame portion 16 are sufficient without providing the reinforcing cross beam 26.

  The longitudinal beams 28, 30, 32, 34 are beam members arranged so that the longitudinal direction is substantially in the bridge axis direction. The longitudinal beam 28 is connected to the upper ends of the first leg 20 and the second leg 22 and is disposed at the highest position among the longitudinal beams 28, 30, 32, 34. In addition, the longitudinal beam 28 is provided on both the widening work side (the side opposite to the main line) and the main line side.

  The longitudinal beam 30 is disposed at the height position corresponding to the reinforcing transverse beam 26, and is disposed at the second highest position among the longitudinal beams 28, 30, 32, 34. The longitudinal beams 30 are provided on both the widening work side (opposite to the main line) and the main line side.

  The longitudinal beams 32, 34 are beam members arranged so that the longitudinal direction is substantially the bridge axis direction, provided only on the side of widening work (opposite to the main line) and provided on the main line side Absent. The longitudinal beam 34 is connected to the lower end of the first leg 20 on the side of the widening work (opposite to the main line), and is disposed at the lowest position among the longitudinal beams 28, 30, 32, 34 There is. The longitudinal beam 32 is disposed at a position slightly lower than the intermediate position between the longitudinal beam 30 and the longitudinal beam 34, and the lower portion of the first leg 20 on the side of the widening work (opposite to the main line) It is connected.

  Of the longitudinal beams 28, 30, 32, 34, the longitudinal beams 30, 32, 34 may be omitted as appropriate if the strength and the rigidity of the frame portion 16 are sufficient without providing them.

  The braces 36 and 38 are disposed only on the widening work side (opposite side of the main line) of the frame portion 16 and the face on the widening work side (opposite side of the main line) of the frame portion 16 substantially parallel to the bridge axial direction. It is a member for reinforcing and stiffening the inside. Even if the braces 36 and 38 are not provided, if the in-plane strength and rigidity of the widening work side (opposite to the main line) of the frame portion 16 substantially parallel to the bridge axis direction are sufficient, the braces 36 and 38 It may be omitted.

  As described above, the first moving means 40 is provided at the lower end portion of the first leg portion 20, and the first leg portion 20 is provided on the side where the receiving cross beam 14 is widened (the side opposite to the main line). The first moving means 40 is disposed on the first rail 44 provided on the top of the tip portion 14A. Further, a second moving means 42 is provided at the lower end portion of the second leg portion 22, and the second leg portion 22 is provided on the road shoulder of the existing steel bridge 100 on the side of widening construction. It is disposed on the second rail 46 via the second moving means 42.

  Therefore, the hanging frame 12 can be moved in the bridge axial direction of the existing steel bridge 100 by the first moving means 40 and the second moving means 42. Since the hanging frame 12 includes the first moving means 40 and the second moving means 42, it is not necessary to apply a large force when moving the hanging frame 12 in the bridge axial direction of the existing steel bridge 100. 6, for example, towing the wire 68 connected to the lower end of the first leg 20 of the suspension frame 12 by means of a pulling device 66 installed on the first rail 44 Thus, the suspension frame 12 can be moved in the bridge axial direction of the existing steel bridge 100. In addition, although illustration is abbreviate | omitted, while a wire is connected also to the lower end part of the 2nd leg 22 of the suspension frame 12, the pulling apparatus is installed also on the 2nd rail 46, When moving the suspension frame 12 in the bridge axial direction of the existing steel bridge 100, this pulling device is simultaneously used to perform pulling.

  The specific configurations of the first moving means 40 and the second moving means 42 are not particularly limited as long as the required performance and safety can be ensured, and more specifically, for example, a chill tank which is a roller device (Registered trademark) can be used.

  In addition, for example, when it is not necessary to move the hanging frame 12 in the bridge axial direction, as in the case where the widening area is extremely limited or when the widening area is repaired, the first moving of the hanging frame 12 is performed. The means 40 and the second moving means 42 may not be provided.

  Fig. 8 is a front view of the steel bridge widening installation device 10 and the existing steel bridge 100 according to the embodiment of the present invention as viewed from the bridge axis direction. Fig. 8 (A) is a one-lane regulation to perform widening work. 8B is a front view schematically showing the arrangement state of the movable cross beam 50 when performing the movement, and FIG. 8B is a schematic view of the arrangement state of the movable cross beam 50 when the traffic is released by releasing the lane regulation. It is a front view shown. In FIG. 8A, of the three lanes, the vehicles 302 and 304 are in the remaining two lanes except for one lane on the widening side (the leftmost side with respect to the traveling direction of the vehicle) that regulates for construction use. The situation in which the vehicle is traveling is schematically shown, and in FIG. 8B, the situation in which the vehicles 302, 304, and 306 are traveling in the three lanes in which the traffic is fully open is shown schematically. .

  The movable cross beam 50 is connected to the lower surface of the vertical beam 28 disposed at the highest position among the vertical beams 28, 30, 32, 34 so as to be movable substantially in the direction perpendicular to the bridge axis.

  When widening work is performed using the steel bridge widening installation device 10 according to the present embodiment, as shown in FIG. 8A, the movable cross beam 50 protrudes in the main line direction of the existing steel bridge 100 to be constructed. As shown in FIG. 8 (B), it is possible to pull back to the widening work side (opposite to the main line) when releasing the lane regulation and opening the entire traffic. . From the viewpoint of preventing traffic congestion, widening work is performed during the nighttime when traffic is low, and during the daytime when traffic is high, as shown in FIG. 8 (B), the movable cross beam is not performed. It is preferable to open the entire traffic by pulling back 50 to the widening work side (opposite to the main line). In the case of performing the widening work using the steel bridge widening installation device 10 according to the present embodiment, only one lane on the widening work side (the leftmost side with respect to the traveling direction of the vehicle) is restricted among the three lanes. Make the 50 protruding tips within the upper range of one lane on the widening side (farthest to the vehicle traveling direction).

  FIG. 9 is a cross-sectional view of a cross section obtained by cutting the movable cross beam 50 at an orthogonal plane.

  The movable cross beam 50 is coupled via the movable cross beam holding member 52 to the lower flange 28A of the vertical beam 28 so as to be movable substantially in the direction perpendicular to the bridge axis. As shown in FIG. 9, the movable cross beam 50 is a steel material having an H-shaped cross section, and is provided with plate-like reinforcing ribs 50D at predetermined intervals (for example, intervals of about 500 mm) in the longitudinal direction. In FIG. 9, reference numeral 50C indicates the web of the movable cross beam 50.

  As shown in FIG. 9, the movable cross beam holding member 52 is configured by attaching two claws 52B arranged to face each other at a predetermined interval by a bolt 54 to the plate 52A. Further, the bolt 54 is attached to the lower flange 28A through the plate-like portion 52A of the movable cross beam holding member 52 and the lower flange 28A of the vertical beam 28, and the movable cross beam holding member 52 is 28 is attached to the lower flange 28A. Further, a plate-like reinforcing rib 56 is attached to a portion of the longitudinal beam 28 corresponding to the portion where the movable cross beam 50 is disposed.

  As shown in FIG. 9, the gap between the plate-like portion 52A and the claw portion 52B is larger than the thickness of the upper flange 50B of the movable cross beam 50, and the movable cross beam 50 has claws at both ends in the width direction of the upper flange 50B. In the state of being caught by the part 52B, it can be reversibly moved in the direction perpendicular to the bridge axis of the existing steel bridge 100.

  As shown in FIG. 8 (A), after the movable cross beam 50 is in a predetermined protruding state in the main line direction of the existing steel bridge 100 to be constructed, and as shown in FIG. 8 (B) And the lower flange 28A of the longitudinal beam 28, the plate-like portion 52A of the movable cross beam holding member 52, and the movable cross beam 50 so as not to move unexpectedly after the movable cross beam 50 is pulled back to the predetermined state. The position of the movable cross beam 50 is fixed by a bolt 58 penetrating the upper flange 50B of the movable cross beam 50.

  As shown in FIGS. 5 and 8, a chain block 74 is movably connected to the movable cross beam 50 via a trolley 72 in the longitudinal direction of the movable cross beam 50, and the trolley 72 and the chain block 74 The lifting and lowering means 70 of the steel bridge widening and erecting apparatus 10 according to the present embodiment is configured.

  The lifting and lowering means 70 is movable in the longitudinal direction of the movable cross beam 50 (substantially in the direction perpendicular to the bridge axis) by providing the trolley 72, and lifting and suspending the widening member 82 by providing the chain block 74. It can be done. Specifically, as shown in FIG. 9, the wheel portion of the trolley 72 is hooked on both widthwise end portions of the lower flange 50A of the movable cross beam 50, and the trolley 72 is in the longitudinal direction of the movable cross beam 50 It is possible to move in the right angle direction).

  The reinforcing rib 50D of the movable cross beam 50 is shaped and sized so as not to interfere with the claw portion 52B of the movable cross beam holding member 52 and the wheel portion of the trolley 72.

  Although the lifting and lowering means 70 of the steel bridge widening and erecting apparatus 10 according to the present embodiment is configured by the trolley 72 and the chain block 74, the lifting and lifting means of the steel bridge widening and bridging apparatus according to the present invention includes If it is a lifting lifting means capable of lifting and hanging and capable of moving in a direction perpendicular to the bridge axis of the existing steel bridge, it is used even if it has a configuration other than the lifting lift 70 by the trolley 72 and the chain block 74 be able to.

(3) Steel bridge widening construction method according to the embodiment of the present invention The steel bridge widening construction method according to the embodiment of the present invention uses the steel bridge widening construction apparatus 10 described above to perform the widening work of the existing steel bridge 100 It is a steel bridge widening construction method to be carried out.

  10 to 13 are front views showing the installation of the additional main girder 86 using the steel bridge widening installation device 10. FIG. 10 shows a stage in which the extension main girder 86 is lifted from the track 300, and FIG. 11 shows a stage in which the extension main girder 86 is suspended slightly downward at a predetermined position. The stage is arranged at a predetermined position on the side of the extension cross beam 84, and FIG. 13 is the stage at which the connection of the extension main cross bar 86 to the extension cross beam 84 is completed. In FIGS. 10 to 13, the second leg 22 and the reinforcing cross beam 26 are indicated by broken lines for convenience of illustration.

  In the following description, although the expansion main girder 86 is taken up and explained among the expansion members 82, about expansion of the width expansion members 82 (expansion horizontal girder 84, expansion girder 88, middle floor version 90) other than the expansion main girder 86 You can work in the same way. The mounting order of the widening members 82 is in the following order: extension horizontal girder 84 → extension main girder 86 → extension longitudinal girder 88 → middle floor plate 90.

  In the steel bridge widening construction method according to the present embodiment, the widening of the existing steel bridge 100 is performed by the moving means (the first moving means 40 and the second moving means 42) and the lifting and lifting means 70 (the trolley 72 and the chain block 74). In the existing steel bridge 100, the widening member 82 (here, the extension main girder 86) disposed at the predetermined position in the arrangement step and the placement step of arranging the widening member 82 (here, the extension main girder 86) used for And a connecting step of connecting.

(3-1) Arrangement Step In the arrangement step, first, as shown in FIG. 10, the widening member 82 (here, the extension main girder 86) is lifted from the track 300 by the chain block 74 of the lifting and lowering means 70. At this stage, the movable cross beam 50 is made to project toward the lane side of the existing steel bridge 100 so that the lifting / lowering means 70 (the trolley 72 and the chain block 74) is located above the bed of the truck 300.

  Next, with the extension main girder 86 lifted by the chain block 74, move the trolley 72 to the widening work side along the longitudinal direction of the movable cross beam 50, and pull the extension main girder 86 into the inside of the suspension frame 12. Position the extension main girder 86 in the direction perpendicular to the bridge axis at a predetermined position. Then, the extension main girder 86 is slightly lowered by the chain block 74, and as shown in FIG. 11, the extension main girder 86 is held at a position where it is lowered slightly.

  Next, in the state shown in FIG. 11 (with the position and height position of the extension main girder 86 in the direction perpendicular to the bridge axis kept as shown in FIG. 11), the suspension frame 12 is bridged by the pulling device 66 or the like. By moving in the direction, the position of the extension main girder 86 in the bridge axis direction is adjusted to a predetermined position. In this embodiment, the extension main girder 86 is lowered slightly downward before the suspension frame 12 is moved in the bridge axial direction by the pulling device 66 or the like, but the extension main girder 86 is not lowered (the track 300 The extension main girder 86 is lifted from the loading platform and the extension main girder 86 is held at the height position as it is pulled into the inside of the suspension frame 12 in a direction perpendicular to the bridge axis) It may be moved in the bridge axial direction by

  When the position of the extension main girder 86 in the bridge axis direction is adjusted to a predetermined position, the extension main girder 86 is lowered by the chain block 74 to a predetermined height position on the side of the extension cross girder 84 as shown in FIG. Make it as shown.

  The arrangement position of the extension main girder 86 shown in FIG. 13 is a position where the position in the direction perpendicular to the bridge axis, the position in the bridge axis direction, and the height position are aligned with the position for connecting to the extension cross girder 84 Placing the main girder 86 in this position completes the placement process.

  As described above, in the arrangement step of the steel bridge widening construction method according to the present embodiment, the width of the widening member 82 is aligned in the direction perpendicular to the bridge axis by the trolley 72, and widening is performed by moving the suspension frame 12 in the bridge axial direction. The axial position of the member 82 is aligned, and the height position of the widening member 82 is aligned by the chain block 74.

(3-2) Connection Process After arranging the extension main girder 86 at a predetermined position in the arrangement step, next, the connection process of connecting the extension main girder 86 to the extension horizontal girder 84 is performed.

  The connecting means of the additional main girder 86 to the additional horizontal girder 84 is not particularly limited as long as the strength and rigidity of the connecting portion can be sufficiently secured. Specifically, for example, the additional main girder 92 and the bolt A girder 86 can be connected to the add-on transverse girder 84.

  A state in which the connection of the additional main girder 86 to the additional horizontal girder 84 is completed and the connection process is completed is shown in FIG. In FIG. 13, the movable cross beam 50 is drawn to the widening work side (opposite to the main line) on the assumption that the lane regulation is temporarily released.

(3-3) Supplement In the explanation of the steel bridge widening construction method according to the present embodiment, the expansion main girder 86 of the widening members 82 has been described, but the widening members 82 other than the expansion main girder 86 The same procedure can be applied to the extension 84, extension string 88 and middle floor plate 90). The mounting order of the widening members 82 is in the following order: extension horizontal girder 84 → extension main girder 86 → extension longitudinal girder 88 → middle floor plate 90 However, the installation of the mid deck 90 can only be performed after removing the ground covering 110 and the wall column 112 (see FIG. 5) of the widening area. It is necessary to remove 110 and the wall column 112.

  After the connection of the extension main girder 86 to the extension horizontal girder 84 is completed as shown in FIG. 13, when the installation work of the extension vertical girder 88 is started, as shown in FIG. With the lifting and lowering means 70 (the trolley 72 and the chain block 74) positioned above the loading platform of the truck 300, repeat the same procedure as in the case of mounting the extension main girder 86, and extend the extension girder 88. Install the As a matter of course, since the mounting position of the additional longitudinal girder 88 and the object to be connected are different from the case of the mounting of the additional main girder 86, the mounting position and the object to be coupled are the mounting position of the additional longitudinal girder 88 and It changes to the object to be connected and repeats the same procedure as the extension main girder 86 to attach the extension girder 88. The same applies to the case of mounting the additional cross beam 84 and the middle floor plate 90.

  In addition, since the receiving cross beam 14 can not be attached by the steel bridge widening construction method according to the present embodiment, one lane is restricted, for example, to the lower surface of the box girder 102 of the existing steel bridge 100 using a 13t rough terrain crane. Install the

  In addition, after the suspension frame 12 is attached to the lower surface of the box girder 102 of the existing steel bridge 100, the suspension frame 12 is assembled and installed at the site, but the assembly at the site of the suspension frame 12 restricts one lane. For example, it can be carried out using a 13 t rough terrain crane.

  In addition, the additional horizontal girder 84 is attached to the outer surface of the web 102A of the box girder 102 in accordance with the position of the diaphragm 102B of the box girder 102 of the existing steel bridge 100. More specifically, FIGS. The box girder 102 is attached to the outer surface of the web 102A of the box girder 102 through the additional cross girder connecting member 84A shown in FIG.

DESCRIPTION OF SYMBOLS 10 ... Steel bridge widening erection installation apparatus 12 ... Suspension frame 14 ... Receiving cross beam 14A ... Widening construction side tip part 16 ... Frame part 20 ... 1st leg 22 ... 2nd leg 24 ... Ceiling cross beam 26 ... Reinforcement cross beam 28, 30, 32, 34 ... vertical beam 28A ... lower flange 36, 38 ... brace 40 ... first moving means 42 ... second moving means 44 ... first rail 46 ... second rail 50 ... movable cross beam 50A lower Flange 50B ... Upper flange 50C ... Web 50D, 56 ... Reinforcement rib 52 ... Movable cross beam holding member 52A ... Plate-like part 52B ... Claw part 54, 58 ... Bolt 66 ... Traction device 68 ... Wire 70 ... Suspension lifting means 72 ... Troli 74 ... Chain block 80 ... Widening area 82 ... Widening member 84 ... Additional horizontal girder 84A ... Additional horizontal girder connecting member 86 ... Additional main girder 88 ... Additional vertical girder 90 ... Middle floor version 92 ... Supporting steel plate DESCRIPTION OF SYMBOLS 100 ... Existing steel bridge 102, 104 ... Box girder 102A, 104A ... Web 102B, 104B ... Diaphragm 106 ... Vertical girder 110 ... Ground cover 112 ... Wall column 200 ... Widening steel bridge 300 ... Truck 302, 304, 306 ... Vehicle 400 ... River G0 ... Web position of additional main girder 86 G1 ... Middle position of two webs provided in box girder 102 G2 ... Web position of girder 106 G3 ... Middle position of two webs provided in box girder 104

Claims (8)

Steel bridge widening installation equipment used for widening construction of existing steel bridges,
A lifting frame for lifting and suspending the widening member used for widening the existing steel bridge and placing the lifting member at a predetermined position;
A receiving cross beam attached to the existing girder of the existing steel bridge so as to protrude from the existing steel bridge to the side where the widening work is performed;
Equipped with
The suspension frame has a frame portion that forms the frame, and lifting and lowering means that lifts and suspends the widening member and is movable in the direction perpendicular to the bridge axis of the existing steel bridge.
The frame portion has a leg portion extending in a substantially vertical direction and a beam portion extending in a direction substantially perpendicular to the bridge axis, and the beam portion is a ceiling portion of the frame portion,
The first leg which is a leg on the side far from the existing steel bridge among the legs is supported by the receiving cross beam, and the second leg which is a leg on the side closer to the existing steel bridge The steel bridge widening installation device characterized in that it is supported on the part of the existing steel bridge on the side where the widening work is performed outside the existing steel bridge roadway in the direction perpendicular to the bridge axis of the existing steel bridge roadway. . The suspension frame further includes moving means for moving in the direction of the bridge axis of the existing steel bridge in the first leg and the second leg.
The first leg portion is supported by the receiving cross beam so as to be movable in the bridge axial direction of the existing steel bridge, and the second leg portion is movable in the bridge axial direction of the existing steel bridge The vehicle is supported by the site of the existing steel bridge on the side where the widening work is performed on the outer side of the existing steel bridge in the direction perpendicular to the bridge axis with respect to the roadway of the existing steel bridge. Steel bridge widening installation equipment. The first rail provided on the receiving cross beam and the site of the existing steel bridge on the side where the widening work is to be performed outside the existing steel bridge in the direction perpendicular to the bridge axis than the roadway of the existing steel bridge Further equipped with a second rail,
The first rail and the second rail both extend substantially in the axial direction of the existing steel bridge,
The first leg is supported by the first rail so as to be movable in the bridge axial direction of the existing steel bridge, and the second leg is in the bridge axial direction of the existing steel bridge The steel bridge widening installation device according to claim 2, characterized in that it is movably supported by the second rail. The apparatus further comprises a first traction device attached to the first rail and a second traction device attached to the second rail.
The steel bridge widening installation according to claim 3, wherein the suspension frame can be moved in the bridge axial direction of the existing steel bridge by being pulled by the first pulling device and the second pulling device. apparatus.   The steel bridge widening installation device according to any one of claims 1 to 4, wherein the lifting and lowering means is attached to the frame portion so as to be movable in a direction perpendicular to the bridge axis of the existing steel bridge. . The frame portion includes a movable beam capable of projecting to the lane side of the existing steel bridge and its pulling back.
The steel bridge widening installation device according to any one of claims 1 to 4, wherein the lifting and lowering means is attached to the movable beam so as to be movable in the longitudinal direction of the movable beam. It is a steel bridge widening construction method performed using the steel bridge widening construction apparatus according to any one of claims 1 to 6,
Arranging the widening member used for widening the existing steel bridge by the suspending and raising means at a predetermined position;
A connecting step of connecting the widening member disposed at the predetermined position in the disposing step to the existing steel bridge;
Steel bridge widening erection construction method characterized by having It is a steel bridge widening construction method performed using the steel bridge widening construction apparatus according to any one of claims 2 to 6,
Arranging the widening member used for widening the existing steel bridge by the moving means and the lifting and lowering means at a predetermined position;
A connecting step of connecting the widening member disposed at the predetermined position in the disposing step to the existing steel bridge;
Steel bridge widening erection construction method characterized by having