JP5856910B2 - Girder installation method - Google Patents

Description

  The present invention relates to a method for installing a girder member.

  As a conventional girder member installation method, for example, one disclosed in Patent Document 1 is known. The method according to Patent Document 1 includes a step of placing a plurality of provisional piles, a step of providing a provisional girder at the upper end of the provisional pile, a step of installing a girder member in the provisional portion, and a girder Providing a rail on the member and laying a track. In this method, the girder member is installed so that the lower surface of the girder member is supported (directly or indirectly) on the upper surface of the provisional girder.

Japanese Patent No. 4136959

  Here, when constructing a structure directly under the track, the inner space of the structure may be used for a predetermined application, and thus it has been conventionally required to secure a large inner space. There has been a demand for a method that can secure a larger interior space than the interior space that can be secured when the above-described girder member installation method is employed.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a method for installing a girder member that can secure a large internal space directly below the track.

  The girder member installation method according to the present invention is a girder member installation method in which a track is laid, and a step of placing a plurality of temporary support piles and a direction intersecting the track at the upper end portion of the temporary support piles. A step of providing a temporary support girder having a protruding portion on the side and a step of installing a girder member on the receiving surface of the protruding portion that forms a receiving surface at a position lower than the upper surface of the temporary receiving girder; And a step of laying a track on the upper surface of the beam member arranged at a position higher than the upper surface of the receiving beam.

  In the installation method of the girder member according to the present invention, an overhang portion that forms a receiving surface at a position lower than the upper surface of the temporary receiving girder is provided on the side portion of the temporary receiving girder. Thus, the girder member is installed on the receiving surface of the overhang portion formed at a position lower than the upper surface of the provisional receiving girder. In addition, the upper surface of the girder member is arranged at a position higher than the upper surface of the provisional girder, and the track is laid on the upper surface. Etc. are prevented. For example, when installing a girder member on the upper surface of the provisional girder, it is necessary to secure at least a space corresponding to the total length in the vertical direction of the provisional girder below the girder member. However, the provisional girder can be installed upward by installing the girder member in the overhanging portion. Therefore, a large inner space directly below the elevated track can be secured by the amount of provisional girder installed upward.

  In the girder member installation method according to the present invention, the girder member is preferably formed in a rectangular plate shape. For example, if the girder member is notched or has an irregular shape, the linear change of the trajectory may be hindered, but such a linear change can be made by making the girder member a rectangular plate shape. Is easier to do.

  The girder member installation method according to the present invention further comprises the steps of constructing a structure below the girder member and disposing a square vibration isolator between the upper surface of the structure and the girder member. Is preferred. By arranging the square vibration isolator between the upper surface of the structure and the girder member, vibration of the girder member can be efficiently suppressed.

  According to the present invention, it is possible to secure a large internal space directly below the track.

It is a perspective view which shows a part of construction structure. It is the figure which looked at the construction structure shown in FIG. 1 from the width direction. FIG. 3 is a view of the erection structure shown in FIG. 1 as viewed from the length direction. FIG. 4 is a view of the erection structure shown in FIG. 1 as viewed from above. It is the figure which looked at the structure after this installation from the upper side. FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. 5. It is sectional drawing along the VII-VII line shown in FIG. It is the figure which looked at the structure to which the anti-advancing structure which concerns on a modification was applied from the upper side. It is sectional drawing along the IX-IX line | wire shown in FIG. It is sectional drawing along the XX line shown in FIG. It is a figure which shows the structure which concerns on a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted. The terms “upper” and “lower” correspond to the upper and lower parts in the vertical direction, respectively.

  When constructing the structure 200 directly below the elevated track, after constructing the installation structure 100 for supporting the PC girder (girder member) 2 and the track 3 extending on the PC girder, the structure 200 is installed. . In the present embodiment, the direction of the track 3 is referred to as “length direction D1”, the horizontal direction orthogonal to the track 3 (direction intersecting the track) is referred to as “width direction D2”, and the vertical direction is referred to as “vertical direction D3”.

  First, the configuration of the erection structure 100 will be described with reference to FIGS. FIG. 1 is a perspective view showing a part of the erection structure 100. FIG. 2 is a view of the erected structure 100 shown in FIG. 1 as viewed from the width direction D2. FIG. 3 is a view of the erected structure 100 shown in FIG. 1 as viewed from the length direction D1. FIG. 4 is a view of the erected structure 100 shown in FIG. 1 as viewed from above. 2 and 3, the main structure 200 is indicated by a dotted line. In this embodiment, two tracks 3 are provided, but FIG. 1 shows only one track 3.

  As shown in FIGS. 1 to 4, the erection structure 100 mainly includes a plurality of provisional piles 11 that are placed on the ground GD and extend in the vertical direction, and provisional girders 12 that extend in the width direction D <b> 2. ing. In addition, the provisional girder 12 is provided with a bracket (projecting portion) 13, and the PC girder 2 is supported by the provisional girder 12 via the bracket 13. A pair of rails 4 constituting the track 3 are provided on the upper surface 2a of the PC girder 2 so as to extend in parallel along the length direction D1.

  In the present embodiment, three provisional piles 11 are provided in the width direction D2. The temporary piles 11 adjacent to each other in the width direction D <b> 2 are connected by a reinforcing beam 14 and a reinforcing oblique beam 16. The inner temporary pile 11 is disposed at a substantially central position between the outer temporary piles 11. The track 3 is provided on the left and right sides of the inside temporary pile 11. A temporary receiving girder 12 is bridged on the upper end portion 11 a of each temporary receiving pile 11. The temporary support beam 12 is an H-shaped steel having an upper flange portion, a lower flange portion, and a web portion. The lower flange portion is fixed to the upper end portion 11 a of the temporary receiving pile 11. Such a combination of the provisional pile 11 and the provisional girder 12 is provided at predetermined intervals in the length direction D1. The temporary piles 11 adjacent to each other in the length direction D <b> 1 are connected by a reinforcing beam 14 and a reinforcing oblique beam 16.

  Brackets 13 projecting in the length direction D1 are provided from the side portions 12a (side surfaces of the web portion in this embodiment) on both sides of the temporary support beam 12. The bracket 13 projects to the outer side at least from the projecting portions of the upper flange portion and the lower flange portion. The bracket 13 forms a horizontally extending receiving surface 13 a for receiving the PC beam 2 at a position lower than the upper surface 12 b of the provisional receiving beam 12. It is preferable that the receiving surface 13a is disposed at least below the center of the provisional receiving beam 12 in the vertical direction D3. The position and size of the bracket 13 in the width direction D2 are not particularly limited as long as the receiving surface 13a can be formed at least at a position where the PC girder 2 is provided. In the present embodiment, the provisional beam 12 extends over substantially the entire length.

  The PC girder 2 is formed in a rectangular plate shape extending in the length direction D1. The PC girder 2 includes an upper surface 2a and a lower surface 2c that spread horizontally, a pair of end surfaces 2b that face each other in parallel in the length direction D1, and a pair of side surfaces 2d that face each other in parallel in the width direction. ,have. The PC girder 2 has a long rectangle in the length direction D1 when viewed from above, and the end face 2b and the side face 2d are not formed with cutouts in the middle, and straight straight sides are formed. It is drawn (see FIG. 4). The PC girder 2 is bridged between provisional girders 12 adjacent in the length direction D1. In the PC girder 2, the lower surface 2 c near the end surface 2 b in the length direction D <b> 1 is installed on the receiving surface 13 a of the bracket 13. The end face 2b of the PC girder 2 is preferably arranged so as to be separated from the tip end portions of the upper flange portion and the lower flange portion of the provisional girder 12 for position adjustment during installation work. The upper surface 2 a of the PC girder 2 is arranged at a position higher than the upper surface 12 b of the provisional girder 12. A pair of rails 4 extending in parallel with each other along the length direction D1 are provided on the upper surface 2a of the PC girder. The rail 4 passes above the gap formed between the end surface 2b of one PC girder 2 and the end surface 2b of the adjacent PC girder 2. At the position of the gap, the rail 4 is disposed at a position spaced upward from the upper surface 12 b of the provisional girder 12. Thereby, the short circuit etc. by the metal rail 4 contacting with the metal temporary support beam 12 are prevented.

  Next, the structure of the structure 200 after the main installation will be described with reference to FIGS. FIG. 5 is a view of the structure 200 after the main installation as viewed from above. 6 is a cross-sectional view taken along line VI-VI shown in FIG. 7 is a cross-sectional view taken along line VII-VII shown in FIG. As shown in FIGS. 5 to 7 (and also refer to FIG. 2), the structure 200 after the main installation mainly includes a slab 201 and a column 202 made of reinforced concrete. The upper surface 201a of the slab 201 supports the PC girder 2 and the rail 4 provided at the time of temporary installation in the same positional relationship. A flat pedestal 21 is formed between the upper surface 201 a of the slab 201 and the lower surface 2 c of the PC girder 2. The pedestal portion 21 is formed by filling a filler such as CA mortar between the upper surface 201a of the slab 201 and the lower surface 2c of the PC girder 2. The size of the pedestal 21 in the width direction D2 is larger than the size of the PC girder 2 in the width direction D2. That is, the side surface 21d of the pedestal portion 21 is disposed on the outer side in the width direction D2 than the side surface 2d of the PC girder 2. In the present embodiment, the end surface 21b in the length direction D1 of the pedestal portion 21 is disposed on the inner side in the length direction D1 than the end surface 2b of the PC girder 2. Further, in the present embodiment, the end surface 21 b of the pedestal portion 21 is disposed on the inner side in the length direction D <b> 1 than the distal end portion of the bracket 13. That is, between the end surface 21b of one base part 21, and the end surface 2b of the PC girder 2 between the said base part 21 and the end surface 21b of the other base part 21 provided in the other side on both sides of the provisional girder 12 A gap larger than the gap between them is formed. The temporary support beam 12 and the brackets 13 on both sides are arranged in the gap.

  The PC girder 2 is supported by a stopper structure 30. The stopper structure 30 is formed by filling a predetermined portion of the PC beam 2 with a filler. An example of the filler used to form the advance stop structure 30 is concrete. In order to describe the configuration of the stopper structure 30, one PC girder 2 is referred to as “first PC girder 2A” and another PC adjacent to the first PC girder 2A in the length direction D1. The explanation will be made by referring to the digit 2 as “second PC digit 2B”. Note that only the anti-advancing structure 30 for the first PC girder 2A and the second PC girder 2B will be described, but the same configuration is applied to the PC girder 2 related to other combinations.

  The stopper structure 30 includes a first filling portion 31 formed by filling a gap provided between the end surface 2b of the first PC beam 2A and the end surface 2b of the second PC beam 2B. A second filling portion 32 formed by filling a filler along the side surface 2d of the first PC beam 2A and the side surface 2d of the second PC beam 2B, and the first PC beam 2A and the second PC beam 2A. And a third filling portion 33 formed by filling a filler between the lower surface 2c of the second PC girder 2B and the upper surface 201a of the slab 201.

  The first filling portion 31 can restrict the movement of the PC girders 2A and 2B in the length direction D1 by supporting the end faces 2b of the first PC girders 2A and the second PC girders 2B. The second filling portion 32 can regulate the movement of the PC girders 2A and 2B in the width direction D2 by supporting the side surfaces 2d of the first PC girders 2A and the second PC girders 2B. The upper surfaces of the first filling portion 31 and the second filling portion 32 reach the upper surface 2 a of the PC girder 2. The end surfaces of the second filling portion 32 and the third filling portion 33 in the length direction D1 reach the end surface 21b of the pedestal portion 21. Thus, since the 2nd filling part 32 has interrupted in the position of end face 21b of pedestal part 21, the 2nd filling part 32 (and 3rd filling part 33) is the PC girders 2A and 2B. Of the side surface 2d, it is formed only on a part of the end surface 2b side. In the present embodiment, the filling portions 31, 32, and 33 are formed while leaving the temporary support beam 12 and the bracket 13 used during temporary installation. At this time, the provisional girder 12 and the bracket 13 are cut along the alternate long and short dash line CT shown in FIG. 5, and the portions not buried in the filling portions 31 and 32 are removed.

  Next, with reference to FIGS. 1-7, the construction method of the structures 100 and 200 which concern on this embodiment is demonstrated. The construction method includes a method for installing the PC girder 2 and a method for constructing the advance stop structure 30 for the PC girder 2. Note that the following procedure is merely an example, and is not limited to the following procedure. For example, the order of each process may be changed as appropriate. In addition, when the process is completed for a part of the part, the process may be transferred to the next process for the part of the part at the same time as the same process is performed in the other part (for example, for all the parts The provisional girder 12 may be provided after the provisional pile 11 has been placed, and when the provisional pile 11 has been placed in some places, the provisional piles 11 are placed in other places. A temporary girder 12 may be provided at the place where the driving has been completed, even during the process. Some steps may be omitted or other steps may be additionally executed.

  First, as shown in FIGS. 1 to 4, a step of placing a plurality of temporary piles 11 from the track is executed. Next, the process of providing the provisional girder 12 extended in the width direction D2 in the upper end part 11a of the placed provisional pile 11 is performed. A bracket 13 that forms a receiving surface 13 a is provided at a position lower than the upper surface 12 b of the temporary receiving beam 12 on the side portion 12 a of the temporary receiving beam 12. That is, the bracket 13 is welded to the H girders at the factory, and the provisional girders 12 provided with the brackets 13 in advance are installed on the temporary piles 11.

  A step of installing the PC girder 2 on the receiving surface 13a of the bracket 13 is executed. The position of the PC girder 2 installed on the receiving surface 13a of the bracket 13 is adjusted on the receiving surface 13a. The upper surface 2 a of the PC girder 2 is arranged at a position higher than the upper surface 12 b of the provisional girder 12. A gap is provided between the end surface 2b of the PC girder 2 and the end surface 2b of the adjacent PC girder 2 so that the end surfaces 2b face each other. Then, the process of laying the track 3 is performed by installing the rail 4 on the upper surface 2 a of the PC girder 2. At the same time, the excavation is advanced and the joint material (brace) is temporarily installed in parallel, whereby the construction structure 100 in the state shown in FIGS. 1 to 4 is completed.

  Next, as shown in FIGS. 5 to 7, the step of forming the structure 200 by forming the pillar 202 and forming the beam / slab 201 is executed. Next, a step of transferring the PC girder 3 supported by the provisional girder 12 to support by the upper surface 201a of the slab 201 is executed. In this embodiment, the process of forming the base part 21 is performed by filling a filler between the lower surface 2c of the PC beam 3 and the upper surface 201a of the slab 201.

  Next, the step of providing the advance stop structure 30 is executed. Specifically, a step of forming the first filling portion 31 by filling the gap between the end surface 2b of the first PC beam 2A and the end surface 2b of the second PC beam 2B is executed. . Moreover, the process of forming the 2nd filling part 32 is performed by filling a filler along the side surface 2d of the 1st PC beam 2A and the 2nd PC beam 2B. Further, the third filling portion 33 is formed by filling a filler between the lower surface 2c of the first PC beam 2A and the second PC beam 2B and the upper surface 201a of the slab 201. By forming the filling portions 31 to 33, the provisional girder 12 is buried in the filling portions 31 to 33.

  Then, the member which comprises the construction structure 100 is removed. Here, the temporary pile 11, the reinforcing beam 14, the reinforcing oblique beam 16, and the like are removed. In addition, the provisional pile 11 is cut | disconnected by the line of the thick line CT shown in FIG. 6, The part which is buried is left as it is, and the part which is not buried is removed. As described above, the PC girder 2 and the track 3 are supported by the structure 200 after the main installation.

  Next, the operation and effect of the installation method of the PC girder 2, the anti-advance structure 30 and the construction method thereof according to the present embodiment will be described.

  In the PC girder 2 installation method according to the present embodiment, a bracket 13 that forms a receiving surface 13 a at a position lower than the upper surface 12 b of the temporary receiving beam 12 is provided on the side portion 12 a of the temporary receiving beam 12. Thus, the PC beam 2 is installed on the receiving surface 13 a of the bracket 13 formed at a position lower than the upper surface 12 b of the provisional receiving beam 12. Further, the upper surface 2a of the PC girder 2 is arranged at a position higher than the upper surface 12b of the provisional girder 12, and the track 4 is laid on the upper surface 2a. Interference and short-circuiting due to contact with the provisional girder 12 are prevented. For example, when the PC girder 2 is installed on the upper surface of the provisional girder 12 as in the construction structure 300 according to the comparative example shown in FIG. 2, the vertical length of the provisional girder 12 is below the PC girder 2. It is necessary to secure the corresponding space. Along with this, it is necessary to reduce the size (indicated by L2 in the drawing) of the inner space of the structure after the main installation. However, in the installation structure 100 configured by the installation method according to the present embodiment, by installing the PC girder 2 on the bracket 13, the space between the upper surface 12 b of the temporary receiving girder 12 and the receiving surface 13 a of the bracket 13 is set. The provisional girder 12 can be installed upward by the size. Therefore, it is possible to secure a large internal space directly below the elevated track by the dimension. That is, when the size of the interior sky of the main structure 200 configured by the installation method according to this embodiment is L1, the provisional receipt is larger than the size L2 of the interior sky according to the comparative example. The size can be increased by the dimension between the upper surface 12 b of the beam 12 and the receiving surface 13 a of the bracket 13. It is also possible to perform construction while hindering the girder due to the hindrance of the pile.

  In the PC girder 2 installation method according to the present embodiment, the PC girder 2 is formed in a rectangular plate shape. For example, when the PC girder 2 is notched or has an irregular shape, it may interfere with the linear change of the trajectory 3, but by making the PC girder 2 into a rectangular plate shape, It becomes easy to perform such a linear change.

  Further, in the construction method of the stop structure 30 for the PC girder 2 according to the present embodiment, the end surfaces 2b in the length direction D1 face each other between the first PC girder 2A and the second PC girder 2B. A gap is provided. The first filling portion 31 is formed by filling such a gap with a filler. The end surfaces 2b of the PC girders 2A and 2B are supported by the first filling portion 31, and the movement of the PC girders 2A and 2B in the length direction D1 is restricted. Moreover, the 2nd filling part 32 is formed by filling a filler along each side surface 2d of the 1st PC beam 2A and the 2nd PC beam 2B. The second filling portion 32 supports the side surfaces 2d of the PC girders 2A and 2B and restricts the movement of the PC girders 2A and 2B in the width direction D2. As described above, even when a gap is formed between the PC girders 2A and 2B, it is possible to construct the swivel stop structure 30 that exhibits sufficient performance.

  In the construction method of the swivel stop structure 30 according to the present embodiment, the second filling portion 32 is formed on a part of the side surface 2d of the first PC beam 2A and the second PC beam 2B on the end surface 2b side. Only formed. Thereby, the amount of the filler can be reduced.

  In the construction method of the advance stop structure 30 according to the present invention, brackets 13 are provided on both side portions 12a of the temporary support beam 12, and the first PC beam 2A and the second PC beam 2B are provided on each of the brackets 13, respectively. is set up. As a result, the effects described above can be obtained. Further, by adopting such an installation method using the bracket 13, at least the longitudinal direction of the provisional beam 12 is provided between the end surface 2b of the first PC beam 2A and the end surface 2b of the second PC beam 2B. Although a gap larger than the size in D1 is formed, the first filling portion 31 and the second filling portion 32 can sufficiently exhibit the performance of the advance stop.

  The advance stop structure 30 according to the present embodiment includes a first filling portion 31 formed by filling a gap provided between the end faces 2b of the PC girders 2A and 2B. . The end surfaces 2b of the PC girders 2A and 2B are supported by the first filling portion 31, and the movement of the PC girders 2A and 2B in the length direction D1 is restricted. Further, the stopper structure 30 has a second filling portion 32 formed by filling a filler along each side surface 2d of the first PC beam 2A and the second PC beam 2B. . The second filling portion 32 supports the side surfaces 2d of the PC girders 2A and 2B and restricts the movement of the PC girders 2A and 2B in the width direction D2. As described above, even when a gap is formed between the PC girders 2A and 2B, the anti-advancing structure 30 can exhibit sufficient performance.

  The present invention is not limited to the embodiment described above. For example, instead of the above-described wrapping stop structure 30, a wrapping stop structure 40 as shown in FIGS. 8 to 10 may be employed. In the stopper structure 40, the second filling portion 42 is formed over the entire region in the length direction D1 of each side surface 2d of the first PC beam 2A and the second PC beam 2B. Note that the entire region in the length direction D1 is not a word indicating the entire region of the side surface 2d itself, and there may be a portion where the filling portion 42 is not formed in the vertical direction D3. As shown in FIG. 10, the second filling portion 42 is formed over the entire length direction D1 in the lower region of the side surface 2d, but is not formed in the upper region. .

  In the structure of FIGS. 8 to 10, the temporary support beam 12 and the bracket 13 are removed. The stopper structure 40 has a first filling portion 41 formed by filling a gap provided between the end surface 2b of the first PC beam 2A and the end surface 2b of the second PC beam 2B. And a second filling portion 42 formed by filling a filler along the side surface 2d of the first PC beam 2A and the side surface 2d of the second PC beam 2B. The first filling portion 41 and the second filling portion 42 are formed so as to surround the PC girders 2A and 2B and the pedestal portion 21.

  The first filling portion 41 can regulate the movement of the PC girders 2A and 2B in the length direction D1 by supporting the end faces 2b of the first PC girders 2A and the second PC girders 2B. The second filling portion 42 can regulate the movement of the PC girders 2A and 2B in the width direction D2 by supporting the side surfaces 2d of the first PC girders 2A and the second PC girders 2B. The upper surfaces of the first filling portion 41 and the second filling portion 42 reach substantially the center in the vertical direction D3 of the side surface 2d of the PC girder 2. The second filling portion 42 is formed over the entire region in the length direction D1 of the side surface 2d. That is, the second filling portion 42 extends without interruption in the middle, and is provided on the end surface 2b on the opposite side of the first PC girder 2A (opposite side of the second PC girder 2B). The filling portion 41 is reached. In the present embodiment, the filling portions 41 and 42 are formed in a state where the temporary support beam 12 and the bracket 13 used for temporary installation are removed.

  The advance stop structure 40 is constructed by the following procedure. Here, it demonstrates from the place which forms the 2nd filling part 42 in the side 2d of the 2nd PC beam 2B. First, the pedestal 21 is formed on the lower surface 2c side of the second PC girder 2B (excluding the region near the end surface 2b), and the side surface 2d of the second PC girder 2B (however, A long second filling portion 42 is formed along a region excluding the region in the vicinity of the end face 2b. However, at this stage, it is necessary to remove the provisional girder 12 and both brackets 13 between the PC girders 2A and 2B, so that the provisional girder 12 and both brackets 13 are not filled with the filler. That is, the pedestal portion 21 and the second filling portion 42 are in a state of being interrupted in front of the front end portion of the bracket 13 (supporting the second PC girder 2B).

  Next, the filling material is not filled in the area near the temporary support beam 12 and both brackets 13 between the PC beams 2A and 2B, and the lower surface 2c side of the first PC beam 2A (however, the region near both end surfaces 2b) And a long second filling portion along the side surface 2d of the second PC girder 2B (excluding the region in the vicinity of both end surfaces 2b) on the upper surface 201a of the slab 201. 42 is formed. At this stage, the pedestal portion 21 and the second filling portion 42 are interrupted in front of the front end portion of the bracket 13 on one end surface 2b (the end surface 2b facing the second PC girder 2B), and the other end surface 2b ( The second PC girder 2B is left in an interrupted state in front of the front end of the bracket 13 on the end surface 2b) opposite to the second PC girder 2B. Thus, the base part 21 and the second filling part 42 in a state of being interrupted in the vicinity of both end faces 2b of the PC girder 2 are formed for each PC girder 2.

  Next, the provisional girder 12 and both brackets 13 between the PC girders 2A and 2B are removed. Thereafter, the second filling portion 42 that is interrupted at the portion is formed, and the first filling portion 41 is formed in the gap between the PC girders 2A and 2B. Similarly, after the other temporary support beam 12 and both brackets 13 are removed, filling portions 41 and 42 are formed in the portions. In this way, the advance stop structure 40 is constructed for each PC girder 2.

  In such a stopper structure 40, the second filling portion 42 is formed over the entire region in the length direction D1 of each side surface 2d of the first PC beam 2A and the second PC beam 2B. . Thus, the second filling portion 42 can firmly support the side surface 2d.

  In the above-described embodiment, the step of forming the pedestal portion 21 by filling the filler between the upper surface 201a of the slab 201 and the lower surface 2c of the PC girder 2 is performed, but instead of this, FIG. As shown in FIG. 4, a step of arranging the square vibration isolator 60 may be executed. This square vibration isolator 60 is fixed to a plate 62 attached to the lower surface 2c of the PC girder 2 by bolt fastening, and is fixed to the plate 62 attached to the upper surface 201a of the slab 201 via bolt mortar 64 by bolt fastening. Has been.

  2 ... PC girder (girder member), 2A ... 1st PC girder, 2B ... 2nd PC girder, 3 ... Track, 4 ... Rail, 11 ... Tentative pile, 12 ... Tentative girder, 13 ... Bracket (Tension) (Exit part), 30, 40 ... full stop structure, 31, 41 ... first filling part, 32, 42 ... second filling part, 60 ... square vibration isolator, 100 ... installation structure, 200 ... book Structure, 201 ... slab.

Claims (3)

A method for installing a girder member on which a track is laid,
A process of placing a plurality of provisional piles;
A process of providing a temporary support girder extending in a direction intersecting with the track on the upper end of the temporary support pile and having a protruding portion on a side part;
Installing the girder member on the receiving surface of the projecting portion that forms a receiving surface at a position lower than the upper surface of the temporary support beam;
And a step of laying the track on the upper surface of the girder member arranged at a position higher than the upper surface of the temporary support girder.   The said girder member is formed in the rectangular plate shape, The installation method of the girder member of Claim 1 characterized by the above-mentioned. Building a structure below the beam member;
The installation method of the girder member of Claim 1 or 2 further equipped with the process of arrange | positioning a square-type vibration isolator between the upper surface of the said structure, and the said girder member.

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