JP4047093B2 - Construction method of multilevel intersection road - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional intersection road that constructs a three-dimensional intersection road at an existing intersection where a plurality of roads intersect in a planar manner, and a construction method thereof.
[0002]
[Prior art]
In the recent automobile society, traffic congestion has occurred at existing intersections that intersect planarly. This trend is particularly acute in urban areas. Therefore, three-dimensionalization of one of the existing roads has been implemented.
[0003]
For example, as shown in FIGS. 9 to 11, when the second road B is three-dimensionalized at an intersection C where the first road A and the second road B intersect in a plane, The center two lanes of the road B cross the first road A, but the three-dimensional portion of the second road B, that is, the three-dimensional intersection road portion Ba is predetermined with respect to the road surface 1 of the second road B. It is comprised by the approach parts 2a and 2b which have the inclination angle, and the bridge part 7a.
[0004]
The bridge portion 7a is disposed between the approach portions 2a and 2b and has a plurality of piers 4a to 4d erected on the foundations 3a to 3d, and a steel deck slab 5 supported by the piers 4a to 4d. And the steel slab 6 laid on the steel slab box girder 5. The bridge portion 7a has a structure in which a steel deck slab girder 5 is installed via a rubber support 8a on the piers 4a to 4d.
[0005]
[Problems to be solved by the invention]
However, such conventional three-dimensional intersection roads have various problems. That is, since the foundations 3a to 3d are extremely large, the construction period is prolonged and the construction cost is increased. In addition, long-term traffic regulation is necessary for the construction of the intersection.
[0006]
On the other hand, piers or steel deck box girder unit configured in steel deck box girder and the steel deck to be used for the construction of three-dimensional cross road is created in a dedicated plant, but assembled on site, piers Ya Steel slab box girder units are limited in unit (block) dimensions due to transportation problems. Therefore, for example, a steel floor slab box girder unit is created at the factory as a plurality of short steel floor slab box girder units, and this steel floor slab box girder unit is an intersection where the first road A and the second road B intersect. Therefore, it is necessary that the steel floor slab box girder unit be joined to each other after being lifted by a traveling crane or the like and placed on the pier.
However, joining the steel slab box girder unit naturally requires time because accuracy is required. In addition, when the first road A is wide, it is necessary to lift and join a large number of steel floor slab box girder units. Therefore, it takes a long time to block the traffic on the first road A in proportion to the road width. Become.
[0008]
There is also a method of leaving the intersection and constructing other bridges in advance, and then building the intersection girder on top of it, and sending it out to build it. Become. As a result, the construction of this type of three-dimensional intersection has problems such as traffic congestion, prolonged construction period, and rising construction costs.
[0009]
The present invention has been made to solve such conventional problems, and provides a three-dimensional intersection that can eliminate traffic congestion, shorten the construction period, and reduce the construction cost, and a construction method thereof. It is for the purpose.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a method for constructing a three-dimensional intersection road according to the present invention is a method of constructing a three-dimensional intersection road in a method for constructing a three-dimensional intersection road that is constructed at an existing intersection where a plurality of roads intersect in a plane . A step of securing an assembly work place on a road that does not interfere with traffic, a bridge pier disposed on both sides of the road at the assembly work place, and a steel deck slab composed of a girder and a steel deck A step of integrally forming a central span portion, a step of transferring the central span portion to an existing intersection by means of a carriage, a step of fixing a bridge pier of the central span portion to a foundation via a support body, the central diameter It comprises a step of constructing a side span portion by joining a plurality of steel deck slabs composed of girders and steel decks on both sides of the intermediate section.
[0012]
In the construction method of the multilevel intersection road according to the present invention , the support material and the piers arranged on both sides of the road are planted and arranged in the assembly work place in claim 1, and the girder is placed on the support material and the pier. And a plurality of steel deck slabs composed of steel decks are lifted and arranged by a lifting machine, and the steel deck slab and the pier are integrated to form a central span, and then the central span It is characterized in that a carriage is introduced below the section and the central span is conveyed to the installation location by the carriage.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a portion a in FIG. 2, and FIG. 2 is a side view of a multilevel crossing road according to the present invention. The same reference numerals are given to the same portions as those of a conventional multilevel crossing road (see FIGS. 10 and 11). Attached.
[0014]
As shown in FIGS. 1 and 2, the three-dimensional intersection road portion Bc of the present invention includes approach portions 2 a and 2 b having a predetermined inclination angle with respect to the road surface 1 of the second road B, and a plurality of piers 4 a to 4. The bridge portion 7c is supported by 4d. This bridge part 7c is comprised from the center span part E straddling the 1st road A, and the side span part F bridge | bridged between this center span part E and approach part 2a, 2b.
[0015]
When constructing the bridge portion 7c, as shown in FIG. 3, the foundations 3a to 3d are placed in the central lane of the second road B and assembled on the second road B that does not hinder traffic. Set workplace D. The length L of the assembly work place D is set to be larger than the width W of the foundations 3b and 3c installed on both sides of the first road A.
[0016]
At this assembly work place D, the central span (crossing section) E is assembled. As shown in FIGS. 4 and 5, the central span E is formed by planting vents 12 a to 12 d as support members and piers 4 b and 4 c arranged on both sides of the first road A. On the vents 12a to 12d and the piers 4b and 4c, the steel floor slab box girder units 13a to 13g manufactured at the factory are suspended and arranged by a lifting machine 14 such as a hydraulic crane. Then, each steel deck box girder units 13a to 13g, thereby integrally joining the piers 4 b and 4 c. At that time, a rubber support portion 8c may be attached to the lower side of the piers 4b and 4c constituting the central span portion E in advance. The steel slab box girder units 13 a to 13 g are constituted by a steel slab box girder 5 and a steel slab 6.
[0017]
A plurality of carriages 15a and 15b are inserted below the central span E formed as described above, as shown in FIG. The carts 15a and 15b are self-propelled publicly known heavy goods transport carts having a lifting platform that is lifted and lowered by a hydraulic jack.
[0018]
The central span portion E supported by the carriages 15a and 15b, after blocking the traffic on the first road A, is transported across the first road A as shown in FIG. That is, when the piers 4b and 4c reach directly above the foundations 3b and 3c, the central span E is lowered onto the foundations 3b and 3c. The piers 4b and 4c are fixed to the foundations 3b and 3c, respectively. At this time, the positioning of the piers 4b and 4c and the foundations 3b and 3c can be easily performed by the support body 8c. Then, the transport carriages 15a and 15b are retracted to the nearest assembly work place.
[0019]
The time required for the central span E to cross the first road A is about several minutes, and the work for fixing the piers 4b and 4c and the foundations 3b and 3c is performed intermittently using a red light, About 1 hour is sufficient as the time for traffic regulation on the first road A.
[0020]
After the installation of the central span E, as shown in FIG. 8 (a), the pier 4a is planted on the foundation 3a, and thereafter, the plurality of steel floor slab box girders units 16a to 16f are lifted by the lifting machine 14, Sequentially lifted and joined together to construct a side span F between the central span E and the approach 2a. Further, as shown in FIG. 8 (b), the pier 4d is planted on the foundation 3d, and then the plurality of steel deck slab units 17a to 17f are sequentially lifted by the lifting machine 14 and joined to each other. The side span portion F is constructed between the central span portion E and the approach 2b.
[0021]
And the bridge part 7c is constructed by the center span part E and the side span parts F and F distribute | arranged to the both sides.
[0022]
In the above description, an example using a steel deck box girder has been described as an example of a steel bridge. However, the bridge type may change if conditions (such as span length and gradient) change.
[0023]
【The invention's effect】
As described above, the three-dimensional intersection road of the present invention is a three-dimensional intersection road straddling an existing intersection where a plurality of roads intersect in a plane, a three-dimensional intersection road portion straddling one road, a plurality of bridge piers, Formed by a steel bridge supported by the pier, a bridge portion made of a steel floor slab laid on the steel bridge, and an approach portion installed on both sides of the bridge portion, and at least an existing pier among the plurality of piers The lower end of the pier facing the road is fixed on the foundation via a support.
[0024]
As described above, according to the present invention, since the bridge piers constituting the three-dimensional intersection road portion are fixed to the foundation via the support body, the force acting on the foundation is reduced. As a result, the foundation structure becomes smaller, and the construction period can be shortened and the construction cost can be reduced.
[0025]
In addition, since the bridge pier and the steel bridge are integrally combined into a block, when transported to the intersection and mounted on the foundation, alignment between the pier and the foundation is facilitated, and the construction period can be shortened.
[0026]
On the other hand, the method for constructing a three-dimensional intersection road according to the present invention is a method for constructing a three-dimensional intersection road that is constructed at an existing intersection where a plurality of roads intersect in plan, and an assembly workshop is secured on the three-dimensional road. A step of assembling a central span portion comprising a plurality of bridge piers, a steel bridge disposed on the bridge pier, and a steel floor deck laid on the steel bridge at the assembly work site, A step of transferring to an existing intersection by a carriage, a step of fixing the bridge pier of the central span portion to a foundation via a support body, a step of arranging side span portions made of steel bridge units on both sides of the central span portion It consists of and.
[0027]
According to the construction method, a part of the three-dimensional intersection road part, that is, the central span part (crossover part) is assembled in a block shape at the assembly work place near the intersection, and then transferred to the intersection by the carriage. Therefore, the work at the intersection is extremely reduced, and it is possible to shorten the traffic regulation time, the construction period, and the construction cost.
[Brief description of the drawings]
FIG. 1 is a perspective view of a portion a in FIG.
FIG. 2 is a side view of a multilevel intersection road according to the present invention.
FIG. 3 is an explanatory diagram of foundation construction.
FIG. 4 is a manufacturing explanatory view of a central span portion.
5 is a view taken along the line XX of FIG.
FIG. 6 is an explanatory diagram of transferring the central span portion.
FIG. 7 is an installation explanatory diagram of a central span portion.
FIGS. 8A and 8B are construction explanatory views of a side span portion.
FIG. 9 is a perspective view of an intersection.
FIG. 10 is a side view of a conventional three-dimensional intersection road.
FIG. 11 is a view taken along arrow YY in FIG.
[Explanation of symbols]
A, B Road C Intersection Bc Multi-level intersection road part 2a, 2b Approach part 3a-3d Foundation 4a-4d Bridge pier 5 Steel floor slab box girder 6 Steel floor slab 7c Bridge part 8c Base

Claims (2)

In the method of constructing a three-dimensional intersection road constructed at an existing intersection where a plurality of roads intersect in a plane, a step of securing an assembly workshop on the three-dimensional road and on a road that does not hinder traffic, A step of integrating a bridge pier arranged on both sides of a road and a steel deck slab composed of a girder and a steel deck at an assembly work site to form a central span, and the central span by a carriage A step of transferring to an existing intersection, a step of fixing a bridge pier of the central span portion to a foundation via a support body, a plurality of steel deck slabs composed of girders and steel decks on both sides of the central span portion A method for constructing a three-dimensional intersection road comprising the steps of constructing a side span portion by joining together. A support material and piers arranged on both sides of the road are planted and arranged in an assembly work place, and a plurality of steel deck slabs composed of girders and steel decks are lifted on the support material and the piers. The steel floor slab girder and the bridge pier are integrated to form a central span, and after that, a carriage is introduced below the central span, and the central span is formed by the carriage. 2. The method of constructing a multilevel intersection road according to claim 1, wherein the method is carried to an installation location .

Images