JP3967953B2 - Construction method of steel solid ramen viaduct - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevated structure for roads and railways, and more particularly to a method for constructing a steel solid ramen viaduct composed of steel girders and steel pipe piers.
[0002]
[Prior art]
The usual way to build a ramen viaduct directly above an existing railway is to build a concrete column outside the building limit (in a range that does not hinder train operation), and to provide a large support above the building limit. And formwork is installed, and concrete is placed for girders and floor slabs. Such a conventional construction method has a drawback that the construction period is long because all construction work is performed on site.
[0003]
As a method for improving the conventional technique, Japanese Patent Application Laid-Open No. 11-247109 proposes a method using a precast concrete member. In this construction method, half precast columns are built on both sides of the track, then half precast girders are installed on the columns, and half precast slabs are installed on the girders, so that the roadbed can be used during construction of the viaduct. Is possible.
[0004]
In the case of the above-mentioned Japanese Patent Application Laid-Open No. 11-247109, if it is attempted to reduce the amount of concrete placed on-site in the half precast member, the member becomes larger and the weight of the block increases, so a large heavy machine is required for construction. . On the other hand, if the weight of the block is reduced, there is a problem that the amount of concrete pouring on site increases and it becomes difficult to shorten the construction period.
[0005]
Further, as a technique for making up for the shortcomings of concrete members, a steel rigid frame elevated structure has been proposed in Japanese Patent Application Laid-Open No. 2000-265416. The method disclosed in this invention fixes the lower part of a concrete-filled steel pipe column as a column member to a synthetic steel pipe column integrally formed on the upper part of a cast-in-place pile, and between concrete-filled steel pipe piles adjacent in the bridge axis direction. A reinforced concrete girder is installed as a vertical girder member.
[0006]
The technology disclosed in JP 2000-265416 A is intended to exclusively suppress shear fracture, ensure high toughness and omit underground beams by adopting a composite structure of a ramen elevated structure and concrete and a steel pipe. No proposals have been made regarding construction methods, such as in-service use of traffic roadbeds during construction and efficiency of construction.
[0007]
[Problems to be solved by the invention]
The present invention uses steel viaducts for viaducts applied to railways and roads, and enables construction under the use of traffic roadbeds, as well as JP-A-11-247109 and JP-A-2000-265416. The purpose is to propose a construction method capable of minimizing the work space and shortening the construction period when constructing a steel ramen viaduct.
[0008]
[Means for Solving the Problems]
In order to solve the above object, the present invention is configured as follows.
[0009]
A first aspect of the present invention is hollow or like an anchor pillars made of steel tube filled with concrete on both sides of the intersection passage plate, then the bridge axis perpendicular digits to the head of the tubular columns, the bridge axis direction digit and some, by the filling material such as concrete after the steel bolster which also serves as the side forms were temporarily fixed fixing the steel bolster and the tubular columns, subsequently, adjacent to the bridge axis direction the Steel pillow beams are integrated with each other by joining a steel girder to a part of the beam in the bridge axis direction of the steel pillow beam, and then a floor slab is installed on the steel girder. It is characterized by that.
[0010]
According to a second aspect of the present invention, in the first aspect, the steel pillow beam is made of H-shaped steel and has a bridge-axis-right-direction pillow beam material that forms a beam in a direction perpendicular to the bridge axis; The bridge axial pillows in the steel pillows are constructed by joining the bridge axial pillow materials that become girders by welding or bolt joining, and the steel pillows adjacent to each other in the bridge axial direction are joined together. It is characterized by being integrated by joining steel beams made of H-shaped steel to the beam material.
The third invention is the first or second aspect, the capital of the tubular columns is characterized in that said bolster attaching steel pillar-side support member for is installed.
[0011]
According to a fourth invention, in the third invention, a pillow beam side support member for temporarily fixing the steel pipe column side support member is attached to the bridge axis perpendicular direction pillow beam material. .
[0012]
In a fifth aspect of the invention according to any one of the first to fourth aspects of the invention, the floor slab laid on the steel girder is made of the steel frame structure panel in which reinforcing steel and steel frames are attached to the bottom steel plate at the site. In addition to being installed on the girders, the bottom steel plate is also used as a formwork, and concrete is cast on-site to form a composite slab that does not require a formwork.
[0013]
[Action]
In the first invention, a steel pipe column made of a hollow or filled concrete is built on both sides of the traffic roadbed, and then a steel beam or a precast is made on the heads of a plurality of steel pipe columns in a direction perpendicular to the bridge axis. The concrete beam is bridged, supported by the support member, and after joining the steel pipe column and the pillow beam, the steel girder is installed, and then the floor slab is installed on the steel girder. By taking the process, the work space that is newly required is only the space that is required for the construction work of the pillar, and the construction space is small. There is no need for incidental work and the construction period can be shortened. In addition, since the steel pipe columns are stronger than the concrete columns, the cross section of the columns can be reduced.
[0014]
In the first invention, the steel beam (steel shell) also serves as a formwork for filling the inside of the concrete to join the column heads. Since the work can be omitted, the work efficiency can be significantly increased, and the support work can be made unnecessary. Therefore, the work space on the construction limit can be reduced, so that the height of the ramen can be lowered.
[0015]
In the fifth aspect of the invention, the formwork at the time of placing the slab concrete can be omitted by using the synthetic floor slab having a member such as a steel plate on the bottom surface of the floor slab. As a result, the construction period can be shortened, the work space on the building limit can be reduced, and the height of the ramen can be lowered.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
1 to 4 are perspective views showing a method for constructing a steel solid ramen viaduct according to the present invention divided into four steps, wherein FIG. 1 is a first step, FIG. 2 is a second step, and FIG. 3 is a third step. FIG. 4 shows the fourth step. FIGS. 5 and 6 are views showing a first embodiment of the joining means for the steel pillar and the steel pillow beam, and FIGS. 7 and 8 are second views of the joining means for the steel pillar and the steel pillow beam. It is a figure which shows an Example.
[0018]
The construction process of the construction method of the steel solid ramen viaduct will be described with reference to FIGS.
[0019]
In FIG. 1 showing the first step, an existing track (hereinafter referred to as a traffic roadbed) 2 is laid on a foundation 1. In order to enable the construction of the three-dimensional ramen viaduct during use of the traffic roadbed 2, pillars 3 made of steel pipes that are hollow or filled with concrete are built on both sides of the traffic roadbed 2. The steel pipe pillar 3 is a set of two pillars on both sides of the traffic roadbed 2 (that is, the direction perpendicular to the bridge axis), and a large number of steel pipe pillars 3 are provided at predetermined intervals in the bridge axis direction.
[0020]
In the second step shown in FIG. 2, a steel pillow beam 4 is temporarily fixed to the head of the steel pipe column 3, and the steel pipe column 3 and the pillow beam 4 are fixed by a filler such as concrete (in FIG. 2). Concrete is omitted).
[0021]
In the third step shown in FIG. 3, a steel girder 5 is joined to and integrated with the steel pillow beam 4.
[0022]
In the fourth step (final step) shown in FIG. 4, a floor slab (slab) is erected on the steel beam 5 for construction.
[0023]
In the present invention, the steel solid ramen viaduct is constructed in the first to fourth steps, and the details in each step will be described next.
[0024]
First, referring to FIG. 5 to FIG. 8, two examples of temporary fixing means of the steel pillow 4 to the head of the steel pipe column 3, and the temporarily fixed steel pipe column, which are constructed at the stage of the second step. 3 and the fixing means by the fillers, such as concrete of the pillow beam 4, will be described.
[0025]
In the first example of the temporary fixing means shown in FIGS. 5 and 6, a plurality of bolt holes 7 are vertically arranged in multiple stages on the outer periphery of the column head 3 a of the steel pipe column 3 filled with the concrete 9 and at a symmetrical position. The two supporting members 8 formed are welded. The support member 8 is for temporarily fixing the steel pillow beam 4 to the steel pipe column 3 and is composed of a rectangular steel plate that is long in the vertical direction. The bolt hole 7 opened in the steel plate is formed when the bolt is inserted. It is made into a long hole so that the horizontal direction of the steel pillow beam 4 of this can be adjusted.
[0026]
As shown in FIG. 2, the steel pillow 4 is arranged in parallel with a bridge axis perpendicular direction pillow beam material 4a made of H-shaped steel having a predetermined length, being separated by a predetermined distance, and at both ends of the pillow beam material 4a, Similarly, the bridge-shaped pillow beam material 4b in which H-shaped steels are arranged in parallel at a predetermined interval is welded or bolted. In the figure, three bridge axis direction pillow beams 4b are arranged in parallel with a predetermined interval in the direction perpendicular to the bridge axis, and each bridge axis direction pillow beam material 4b has an end portion of the bridge axis perpendicular direction pillow beam material 4a. By joining, one unit of the steel pillow beam 4 is configured.
[0027]
Welded structure of the bridge axis perpendicular bolster member 4a and the bridge axis direction Komakuraharizai 4 b may be optional, but if using the same H-shaped steel Ryomakuraharizai 4a, 4b as shown, The upper and lower flanges at both ends of one pillow beam material 4b are cut out over a predetermined length, the web of the cut portion is inserted between the upper and lower flanges of the other pillow beam material 4a, and the webs and flanges of both pillow beam materials 4a and 4b are joined. Both the pillow beam members 4a and 4b can be fixed by welding or bolting the butt joints.
[0028]
By assembling the bridge-axis-direction pillow beam material 4a and the bridge-axis-direction pillow beam material 4b as described above, the inside surrounded by the pillow beam materials 4a, 4b becomes the space 10 for filling the filled concrete 14. That is, each pillow beam material 4a, 4b becomes a steel shell that functions as a mold when the inside space 10 is filled with the filling concrete 14.
[0029]
The interval between the parallel bridge axis perpendicular direction pillow beam members 4a is set to be slightly larger than the diameter of the column head 3a so that the column head 3a of the steel pipe column 3 can be inserted inside thereof. Further, the length of the bridge axis direction pillow beam material 4b is set larger than the interval width of the bridge axis perpendicular direction pillow beam material 4a. Therefore, both ends of the pillow beam material 4a are larger than the parallel two pillow beam materials 4a. Projects in the direction of the bridge axis. The ends of the beam 5 made of H-shaped steel are welded or bolted to each bridge axis direction pillow beam material 4b at the joining portion 18 (shown in the third step in FIG. 3).
[0030]
5 and 6, the left and right bridge axis perpendicular direction pillow beam members 4a are provided with pillow beam side support members 11. This pillow beam side support member 11 is provided opposite to the steel pipe column side support member 8 of the column head 3a. The pillow beam-side support member 11 is formed of a steel plate having a length substantially the same as the upper and lower flange intervals of the H-shaped steel pillow beam member 4a and having a width protruding from a side edge of the flange by a predetermined dimension. Bolt holes 7 are opened in multiple stages.
[0031]
That is, the pillow beam-side support member 11 is disposed on the opposite side surface of the parallel-placed pillow beam member 4a, and the upper and lower edges and one side edge of the support member 11 are disposed on the upper and lower flange inner surfaces of the pillow beam member 4a and one side surface of the web. The abutting portion is fixed to the pillow beam member 4a by welding or bolting. The bolt hole 7 opened in the support member 11 is a long hole so that the lateral adjustment of the steel pillow beam 4 can be performed when the bolt is inserted.
[0032]
When the steel pillow beams 4 are fixed to the steel pipe columns 3, the left and right steel pillow beams 4 shown in FIG. 2 are used as one unit member, and each steel pillow beam 4 is lifted up to the height of each column head 3a by a heavy machine. The steel pipe column 3 is set up in a direction perpendicular to the bridge axis. Next, one side surface of the pillow beam side support member 11 traveling from the side edge of the pillow beam member 4a is applied to one side surface of the steel pipe column side support member 8 so that each bolt hole 7 is matched. The steel pillow beam 4 is temporarily fixed to the steel pipe column 3 by inserting the bolt 12 and fastening the nut 13.
[0033]
Subsequently, the inside-filled concrete 14 is filled into the inner space 10 surrounded by the bridge axis perpendicular direction pillow beam material 4a and the bridge axis direction pillow beam material 4b. Thereby, the steel pillow beam 4 is fixed to the steel pipe column 3 through the filling concrete 14, and the synthetic pillow beam is constructed. By fixing the gibber bar 15 or the like to the steel pipe column 4, the fixation is further ensured.
[0034]
When filling the concrete stuffed concrete 14, the pillow beam members 4a and 4b become steel shells and function as molds. Therefore, the side molds on the four sides are unnecessary, and a simple mold can be assembled only on the bottom surface. Therefore, it is not necessary to make a support work as in the past and to build a large formwork, and accordingly, the construction period required to construct the pillow beam is significantly shortened compared to the conventional case.
[0035]
7 and 8 show a second example of temporary fixing means for the steel pillow beam 4 to the steel pipe column head portion 3a.
[0036]
In the second example of FIGS. 7 and 8, one end of the support member 16 is welded to the outer periphery of the column head 3 a of the steel pipe column 3 and at a symmetrical position. The support member 16 is configured by cutting H-shaped steel into a predetermined length, and is provided for temporarily fixing the steel pillow beam 4 to the steel pipe column 3. A bolt hole 7 is formed in the upper flange of the support member 16, and the bolt hole 7 is a long hole so that the lateral adjustment of the steel pillow beam 4 can be performed when the bolt is inserted.
[0037]
Further, in the steel pillow beam 4 in which the second example is implemented, only the configuration of the pillow beam side support member 17 provided on the bridge beam perpendicular direction pillow beam material 4a is different from the first example described in FIGS. is doing. In this second example, the pillow beam side support member 17 is configured by fixing a horizontal member 17b to a vertical member 17a. More specifically, the vertical member 17a has a length (L) that is approximately the same length as the upper and lower flange spacing of the steel beam member 4a that is long in the vertical direction, that is, the H-shaped steel pillow beam member 4a (L). ₁ ), the transverse member 17b is made of steel by cutting off the upper and lower flanges at one end of the H-shaped steel cut to a predetermined length, as shown in an enlarged view in FIG. 8 (b). The side surface of the cut portion of the web 17c is applied to the side surface of the intermediate portion of the longitudinal member 17a made of a steel plate and welded or bolted.
[0038]
The pillow beam side support member 17 is arranged on the opposite side surface of the pillow beam member 4a arranged in parallel in the left-right direction, and the vertical and vertical edges and one side edge of the vertical member 17a are connected to the upper and lower flange surfaces and the web surface of the pillow beam member 4a. And the abutting portion is welded, so that the H cross-section portion of the lateral member 17b is fixed to the pillow beam member 4a in such a manner that it travels from the side edge of the pillow beam member 4a. Bolt holes 7 are formed in the lower flange 17d of the horizontal member 17b. The bolt hole 7 is a long hole so that the lateral adjustment of the steel pillow beam 4 when the bolt is inserted is possible.
[0039]
In the second example of the temporary fixing means, when the steel pillow beam 4 is fixed to the steel pipe column 3, the steel pillow beam 4 disposed between the steel pipe columns 3 erected in parallel to the direction perpendicular to the bridge axis is used. As a unit member, the steel pillow beam 4 is lifted up to the height of each column head 3a by a heavy machine. Next, the lower flange 17c of the H-shaped steel of the pillow beam side support member 17 is placed on the upper surface of the upper flange 16c of the H-shaped steel of the steel pipe column side support member 16, and the bolts 12 are inserted into the respective bolt holes 7. By fastening the nut 13, the steel pillow beam 4 is temporarily fixed to the steel pipe column 3 (it may be temporarily fixed by spot welding).
[0040]
Subsequently, the inner space 10 surrounded by the bridge axis perpendicular direction pillow beam material 4 a and the bridge axis direction pillow beam material 4 b is filled with the intermediate filling concrete 14, and thereby the steel pillow beam 4 through the intermediate filling concrete 14. Is fixed to the steel pipe column 3 to construct a synthetic pillow beam. By fixing the gibber bar 15 or the like to the steel pipe column 4, the fixation is further ensured.
[0041]
Also in the second example, when filling the filling concrete 14, the pillow beam members 4a and 4b are steel shells and function as a mold, so that the side molds on the four sides are unnecessary, and only the bottom is a simple mold The first example of temporary fixing means is that it is not necessary to create a support work and build a large formwork, and the construction period required to construct a pillow beam is significantly reduced compared to the conventional method. Is the same.
[0042]
Next, as shown in the third step of FIG. 3, the end of the bridge-axis-direction pillow beam 4 b in the steel pillow beam 4 fixed to the steel pipe column 3 is made of H-shaped steel that extends in the bridge-axis direction. The end of the steel girder 5 is welded or bolted at the joint site 18. Three bridge beams 4b are arranged in parallel at the intermediate part and both ends above the traffic roadbed 2, and three rows of steel girders 5 extending in the bridge axis direction are joined to each. .
[0043]
In addition, the floor slab 6 installed on the steel girder 5 is composed of a synthetic floor slab that does not require a lower formwork during construction. That is, as shown in FIG. 4 (b), which is an enlarged cross-sectional view of the portion (a) in FIG. 4 (a), a reinforcing bar 20, a stud 21 or a steel frame (not shown) is attached to the bottom steel plate 19 in the field work. A frame panel is constructed, and the frame panel is placed on the steel girder 5 and then concrete 22 is cast on site to form a composite floor slab. When the floor slab concrete 22 is placed, the bottom steel plate 19 also serves as a formwork, so the work of the formwork is shortened because the work of the formwork can be omitted, and moreover, a large support work for work is not required. It is possible to reduce the height of the viaduct by being able to reduce the work space in the building.
[0044]
Finally, the soundproof walls 23 are constructed on both sides of the floor slab 6, and the track 24 is laid on the floor slab 6 to complete the steel solid ramen viaduct. And the 1st-4th process can be constructed in parallel with in-service of the traffic roadbed 2.
[0045]
The above-described temporary fixing means for the steel pipe column 3 and the steel pillow beam 4, the configuration of the steel pillow beam 4, and the like are merely examples, and the present invention is not limited to this, and the configuration of the embodiment is modified. It does not matter if you do it.
[0046]
【The invention's effect】
According to the present invention, a floor slab (slab) in which a steel pillow beam is fixed to the heads of steel pipe columns built on both sides of a traffic roadbed, a steel beam is attached to the pillow beam, and then installed on the steel beam As the construction process is carried out, it is possible to perform the construction when the traffic roadbed is used, that is, the construction work over the live line, and it is possible to reduce the construction space required for the complicated formwork and support work that was required in the past . In addition, steel solid ramen viaducts mainly consist of steel structures, so it is possible to omit the work of concrete formwork and reduce the amount of concrete. In addition, since the installed members are lightweight, construction is done with small heavy machinery. This makes it possible to shorten the construction period and save labor.
[0047]
In addition, the formwork for constructing the floor slabs installed on the steel girders can be omitted, so the space under the ramen structure can be reduced and the height of the ramen structure can be lowered. Construction is easy and economical.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first step showing a method for constructing a steel solid ramen viaduct according to the present invention divided into four steps.
FIG. 2 is a perspective view of a second step of the method for constructing a steel solid ramen viaduct according to the present invention.
FIG. 3 is a perspective view of a third step of the method for constructing a steel solid ramen viaduct according to the present invention.
4A is a perspective view of a fourth step of the method for constructing a steel solid ramen viaduct according to the present invention, and FIG. 4B is an enlarged cross-sectional view of FIG.
FIG. 5 is an exploded perspective view showing a first embodiment of a coupling means for a steel column and a steel pillow beam.
6A is a partial vertical cross-sectional view when the steel column and the steel pillow beam shown in FIG. 5 are joined together, and FIG. 6B is a transverse cross-sectional view.
FIG. 7 is an exploded perspective view showing a second embodiment of the coupling means for the steel pillar and the steel pillow beam.
8A is a partial longitudinal cross-sectional view of the steel pillar and steel pillow beam connecting means shown in FIG. 7 when combined, and FIG. 8B is a perspective view of the steel pillow beam support member. .
[Explanation of symbols]
1 Basic 2 Traffic roadbed (track)
3 Steel pipe pillar 4 Steel pillow beam 5 Steel girder 6 Floor slab 7 Bolt hole 8 Support member 9 Concrete 10 Space 11 Pillow beam side support member 12 Bolt 13 Nut 14 Filled concrete 15 Givel bar 16 Support member 17 Pillow beam side support Member 18 Joint part 19 Bottom steel plate 20 Reinforcement 21 Stud 22 Concrete 23 Soundproof wall 24 Track

Claims (5)

The hollow or on both sides of the intersection passage board like an anchor pillars made of steel tube filled with concrete, then the bridge axis perpendicular digits to the head of the tubular columns, and a portion of the bridge axis girder, side steel bolster which also serves as a part mold and securing the steel bolster and the steel column by filler such as concrete after having temporarily fixed, subsequently, the steel bolster adjacent to the bridge axis direction The steel is characterized in that it is integrated by joining a steel girder to a part of the girder in the bridge axis direction of the steel pillow beam, and then a floor slab is installed on the steel girder and constructed. A method for constructing three-dimensional ramen viaduct. The steel pillow beam comprises a bridge axis perpendicular pillow material made of H-shaped steel and serving as a beam perpendicular to the bridge axis, and a bridge axis pillow beam material comprising H-shaped steel and serving as a beam in the bridge axis direction. It is constructed by joining by welding or bolt joining,
The steel pillow beams adjacent to each other in the bridge axis direction are integrated by joining a steel beam made of H-shaped steel to the bridge axis direction pillow beam material in the steel pillow beam. The construction method of the steel solid ramen viaduct according to claim 1. Wherein the stigma of tubular columns, according to claim 1 or 2 method for constructing a steel Space Frames viaduct, wherein the steel pipe column side support member is mounted, et al for the bolster mounting. 4. The construction of a steel three-dimensional ramen viaduct according to claim 3, wherein a pillow beam-side support member for temporarily fixing the steel pipe column-side support member is attached to the bridge axis perpendicular direction pillow beam material. Method. The floor slab installed on the steel girder shall be installed on the steel girder with a framed panel with rebars and steel frames attached to the bottom steel plate at the site, and the bottom steel plate also serves as a formwork. by then Da設concrete on site, formwork claim 1 any one method of constructing a steel Space frames viaduct according 4, characterized in that configured as unwanted synthesis slab.

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