JPH09177030A - Bridge of vertically integrated mixed rigid frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively and quickly perform an overhang erection even in a construction site where the constructing space is limited by providing a lower substructure having a concrete structure, and an upper substructure having a steel structure, and rigidly bonding the connecting part between the lower substructure and the upper substructure by a composite structure. SOLUTION: A lower substructure 2 is formed of a concrete structure since the vertical compression force is dominant. On the other hand, an upper substructure 3 is formed of a steel structure since it is extended in the bridge axial direction, and the bending moment is dominant. The bonding part 11 between the lower substructure 2 and the upper substructure 3 is rigidly bonded by a composite structure. Thus, erecting bars can be loaded on the upper substructure without using a timbering, and an economic and quick overhang erecting work can be performed even in a ground difficult to sufficiently ensure a field constructing yard.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge having an upper and lower integrated mixed ramen structure, and more particularly to a bridge having an upper and lower integrated mixed ramen structure which can be rationalized.

[0002]

2. Description of the Related Art Conventionally, as a method of erection of bridges, etc., there are a delivery method, an erection girder method, a vent method, a cantilever method (cantilever method), a cable method, a collective erection method (large block method), and stealing. There are construction methods, etc., and they are selected and adopted according to the location conditions of the erection site, the type of bridge, the type of erection equipment, and economic efficiency.

The sending-out construction method is a construction method in which a bridge body, which has been prefabricated in a place adjacent to the construction point, is sent out using various equipment and is bridged over a required radius.

The erection girder construction method is a erection construction method in which a girder member is transported as a single material to an erection girder installed at an erection point and then assembled.

The vent method is an erection direction in which a supporting structure (temporary column or vent) for supporting the bridge is built in advance at a planned position in the bridge erection section, and the bridge girder members are successively erected and assembled using the vent as a support point. .

In the cantilever construction method, the bridge girder block such as the side span is erected while being supported by a vent, and then the bridge girder is used as a counterweight, and thereafter, the bridge girder is erected while being temporarily extended without being temporarily supported. It is an erection construction method.

The cable-type construction method is an erection construction method for erection using cables and supporting equipment for steel towers.

The collective erection method (large block method) is the entire bridge girder assembled at the bridge girder manufacturing plant or near the erection site,
Alternatively, it is a construction method in which several divided blocks are erected as they are.

The horizontal construction method is a construction method in which a girder constructed by a vent construction method, a cable construction method or the like is laterally moved to a predetermined position in a span unit.

Among these construction methods, particularly the delivery construction method,
Cantilever construction method or collective construction method (large block construction method)
Is used as a bridge erection method in terrain where it is possible to extend one side or both left and right in the bridge axis direction and it is not possible to secure sufficient construction yard on site, such as in the mountainous area or the sea top. Has been done.

At the time of this overhanging work, it is necessary to vertically integrate the substructure of the bridge pier and the superstructure of the bridge girder, and to integrate the upper and lower parts in order to secure a foothold for the erection equipment installed in the superstructure. Is.

A conventional bridge will be outlined with reference to FIGS. 7 to 9. The bridge 1 in FIG. 7 is a bridge having an upper and lower integrated structure in which a lower work 2 and a upper work 3 extending in the bridge axis direction are rigidly connected and the upper and lower parts are integrated.

The bridge 5 shown in FIG. 8 is a bridge having an upper and lower separation structure of a type in which the lower work 2 and the upper work 3 are separated, and has a bearing portion 6 between the lower work 2 and the upper work 3. ing. In the case of this bridge 5, when carrying out overhanging, since it is difficult to overhang the bridge as it is, a supporting work such as a vertical support member 7 (vertical vent) or an oblique support member 8 (oblique vent) is provided in advance. It is designed to be removed after the overhanging is completed.

FIG. 9 is a table showing a list of conventional structural types. In the case of a separated structure, the vertical support member 7 or the vertical support member 7 is used because the upper and lower connections are carried out as shown in FIG. In general, it is difficult to erect the bridge unless supporting work such as the diagonal support member 8 is used. Further, in the case of the bridge 5 having the vertically separated structure shown in FIG. 8, since the substructure 2 and the superstructure 3 are constructed independently of each other, it is inefficient in many aspects. There is.

In the case of the bridge 1 of the upper and lower integrated structure shown in FIG. 7, as shown in FIG. 9, the substructure 2 and the superstructure 3 are currently made of the same material, but they are strong against pulling and are lightweight. Considering the respective material properties of steel and concrete which are resistant to compression, there is a problem that a structure in which the substructure 2 and the superstructure 3 are made of the same material such as a concrete material is not rational.

[0016]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is possible to construct an overhanging structure and to provide a sufficient construction yard at the site, such as in the mountains or the sea. It is an object of the present invention to provide a bridge having an upper and lower integrated mixed rigid frame structure which is adopted as a bridge type in a terrain that cannot be secured.

Another object of the present invention is to provide a bridge having an integrated upper and lower rigid frame structure, which is economical, and which can shorten the local process by rapid construction and rationalize the erection equipment.

It is another object of the present invention to provide a bridge having an upper and lower integrated mixed ramen structure which does not require support work such as a vertical support member and an oblique support member by integrating a lower work and an upper work.

[0019]

That is, the present invention focuses on adopting a concrete structure as a substructure and a steel structure as a superstructure. The above-mentioned upper part and the above-mentioned upper part, which has a steel structure and a superstructure that is subjected to bending moment force and has a steel structure This is a bridge with an integrated upper and lower rigid frame structure characterized by being constructed by projecting work in the bridge axis direction.

As the concrete structure, RC is used.
(Reinforced Concrete) structure, S
RC (Steel Reinforced Concr)
ET) structure, PC (Prestressed Con)
Either a crete) structure or a composite column of steel and concrete can be employed.

The composite structure may be provided with a stud for preventing slippage.

In the bridge of the mixed upper and lower rigid frame structure according to the present invention, the substructure and the superstructure are not made of the same material but the concrete structure is used for the substructure and the steel structure is used for the superstructure. It is possible to arrange the structure and the joint between the substructure and the superstructure is rigidly connected by the composite structure, so the substructure and the superstructure can be integrated and used as a superstructure without using support work. It becomes possible to install erection equipment, and economical and speedy erection work can be performed even on terrain where it is difficult to secure sufficient local construction yards.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a bridge 10 having an upper and lower integrated ramen structure according to an embodiment of the present invention will be described with reference to FIGS. However, the same parts as those in FIGS. 7 to 9 are designated by the same reference numerals, and the detailed description thereof will be omitted. FIG. 1 is a side view of a bridge 10 having an upper and lower part integrated mixed ramen structure. This bridge 10 having an upper and lower part integrated mixed ramen structure is provided between a substructure 2, a superstructure 3, a substructure 2 and a superstructure 3. And a joint portion 11 which is integrated with each other.

The substructure 2 has a predominantly compressive force in the vertical direction (axial direction), and therefore has a concrete structure. Concrete structure, RC structure, SR
Any structure such as a C structure, a PC structure, or a composite column of steel and concrete can be adopted.

The superstructure 3 extends in the bridge axis direction and the bending moment is predominant. Therefore, the superstructure 3 has a steel structure.

The joint portion 11 is a composite structure which integrates the lower work 2 and the upper work 3 by constructing the space between the lower work 2 and the upper work 3 from steel and concrete.
Any structure can be adopted.

FIG. 2 is a cross-sectional view of an essential part showing an example of the joint portion 11 having a composite structure. In the joint portion 11, a concrete substructure 2 and a steel superstructure 3 are integrated. Steel plate 12 having a three-dimensional structure, anti-slip studs 13 provided on the steel plate 12 in the three-dimensional direction, concrete material 14 filling the portion from substructure 2 to superstructure 3, and concrete material 14 and the upper part. Sealing material 15 between the work 3 and
Having. In addition, the drainage slope 1
6 is formed.

3 to 5 are explanatory views showing a process of constructing the composite structure of the joint portion 11, in which the substructure 2 is constructed at a predetermined point (FIG. 3), and then the top of the substructure 2 is constructed. 2A
The steel plate 12 and the studs 13 for preventing slippage are provided on the base plate (FIG. 4), and finally the portion surrounded by the steel plate 12 and the steel plate
Concrete material 14 is poured into the outer portion of 2 to form the joint 11 (FIG. 5). It should be noted that the joint portion 11 may have any structure other than the above.

FIG. 6 is a side view showing a step of constructing the bridge 10 having the upper and lower integrated mixed rigid frame structures after the joint 11 having such a structure is constructed.
And superstructure 3 integrally fixed on the joint 11
Since the substructure 2 and the substructure 2 are integrated into the upper and lower parts, a predetermined erection crane 17 may be arranged on the upper surface of the substructure 2 and a necessary bridge girder 18 for each block, which is manufactured in advance in a factory, may be erected and erected. Of course, other overhang construction methods can also be performed.

Thus, a long bridge can be constructed even on a terrain where it is difficult to secure a construction space. Further, it is not necessary to support the vertical support member 7 or the diagonal support member 8 which is conventionally required in the overhanging construction of the upper and lower separation structures as shown in FIG.

Since it is possible to construct the overhang structure, it is not necessary to use a space other than the block carry-in space as a field construction yard. Furthermore, since no large-scale temporary equipment other than the erection crane 17 is required, rapid construction can be realized.

[0032]

As described above, according to the present invention, the materials of the substructure and the superstructure are selected to be concrete and steel, respectively, and the joint portion therebetween is integrally joined to each other by the composite structure. Even on the site where the space is limited, it is possible to carry out the erection at a low cost and quickly.

[0033]

[Brief description of the drawings]

FIG. 1 is a side view of a bridge 10 having an upper and lower unit mixed ramen structure according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing an example of a joint part 11 having a composite structure.

FIG. 3 is an explanatory diagram showing a process of constructing a composite structure of the joint portion 11, and is a side view showing a state in which a substructure 2 is constructed at a predetermined point.

FIG. 4 is an explanatory view showing a step of constructing a composite structure of the joint portion 11, and is a side view showing a state in which a steel plate 12 and a shift prevention stud 13 are provided on the top portion 2A of the substructure 2.

FIG. 5 is an explanatory view showing a process of constructing a composite structure of the joint portion 11, showing a portion surrounded by the steel sheet 12 and the steel sheet 1.
It is a side view which shows the state which poured the concrete material 14 into the outer side part of 2, and comprised the joint part 11. As shown in FIG.

FIG. 6 is a side view showing a process of constructing a bridge 10 having an upper and lower integrated ramen structure and then performing erection.

FIG. 7 is a side view of a conventional bridge 1 having upper and lower parts integrated with each other.

FIG. 8 is a side view of a conventional bridge 5 which is separated into upper and lower parts.

FIG. 9 is a diagram showing a list of conventional structural types.

[Explanation of symbols]

 1 Bridge with integrated upper and lower parts (Fig. 7) 2 Substructure 2A Top part of substructure 2 (Fig. 4) 3 Upper part 5 Bridge with upper and lower parts separated (Fig. 8) 6 Bearing part 7 Vertical support member (vertical vent) (support work) ) 8 diagonal support member (diagonal vent) (support) 10 bridge with upper and lower integrated rigid frame structure (Fig. 1) 11 joint (composite structure) 12 steel plate 13 anti-slip stud 14 concrete material 15 sealing material 16 drainage gradient section 17 Construction crane 18 Bridge girder

Claims (1)

[Claims] 1. A substructure that receives an axial force and has a concrete structure; a superstructure that receives a bending moment force and has a steel structure; and a rigid connection between the substructure and the superstructure.
A bridge having an upper and lower integrally mixed ramen structure, characterized in that it has a joint part having a composite structure of concrete and is constituted by projecting the superstructure in the bridge axial direction.