JP4029058B2 - Construction method of approach part of multilevel intersection road - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional intersection road comprising a bridge portion straddling an existing intersection where a plurality of roads intersect in plan, and an approach portion provided on both sides of the bridge portion and connecting the bridge portion and a road surface. it relates to approach Buken設方method.
[0002]
[Prior art]
In the recent automobile society, traffic congestion occurs at an existing intersection where a plurality of roads intersect in a plane. 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 FIG. 11, the second road B is three-dimensionalized at an intersection C where the first road A (for example, four lanes) and the second road B (four lanes) intersect in a plane. In this case, it is configured so that the two lanes in the center of the second road B straddle the first road A. In this case, the three-dimensional portion of the second road B, that is, the three-dimensional intersection road D, As shown in FIG. 12, a bridge part D1 straddling the first road A, an approach part D2 arranged on both sides of the bridge part D1 and connecting the bridge part D1 and the road surface B1 of the second road B, Consists of.
[0004]
By the way, this approach part D2 is provided with L-shaped retaining walls 1a and 1b so that the section thereof has the same interval as the three-dimensional intersection road width W1 as shown in FIG. 13, and between these L-shaped retaining walls 1a and 1b. A bank 2 is applied, and a road bed 3 is laid on the bank 2.
[0005]
Then, as shown in FIG. 14, such an approach portion D <b> 2 previously installs a work band 5 having a width W <b> 2 larger than the three-dimensional intersection road width W <b> 1 on the fence 4, and then soils on the upper surface in the work band 5. And the L-shaped retaining walls 1a and 1b are arranged (FIG. 15).
[0006]
And after embankment 2 is given between these L-shaped retaining walls 1a and 1b (FIG. 16), the road bed 3 is arrange | positioned on this embankment 2 (FIG. 17). After that, a construction method has been adopted in which the road surface 3 is completed by pavement bridge construction.
[0007]
[Problems to be solved by the invention]
By the way, according to the approach part structure of a three-dimensional intersection road as described above, since the embankment 2 is performed between the L-shaped retaining walls 1a and 1b, not only the earth and sand for this purpose but also the embankment 2 is fixed. Since the road bed 3 cannot be arranged until it is completed, there is a problem that the construction period becomes long. And when constructing approach part D2 of such structure, it is necessary to install work zone 5 which has width W2 larger than level crossing road width W1 beforehand, and, therefore, traffic congestion has arisen over a long period of time.
[0008]
More specifically, the three-dimensional intersection road D is a three-dimensional lane a1, b1 (see FIG. 11) on the inner side of the second road B. In this case, the work zone 5 is located on the outer lanes a2, b2. As a result, traffic on the outside lanes a2 and b2 is restricted, and as a result, traffic congestion occurs. This traffic congestion is caused by the approach unit D2 (FIG. 12). It occurs over a long period of time until completion (for example, 4 months or more).
[0009]
[Means for Solving the Problems]
The present invention has been made to solve the conventional problems as described above, and is configured as follows.
[0010]
First aspect of the present invention, from a bridge portion straddling the existing intersections where a plurality of roads intersect in a plan view, and approach portion which connects the and the bridge portion and the road surface provided on both sides of該橋beam portion In the method of constructing the approach portion of the three-dimensional intersection road , a step of forming a work zone using a part of the inner lane on the road surface on which the approach portion is arranged, and the width of the three-dimensional intersection road on the ground of the work zone A step of laying a bottom plate having a smaller width; a step of arranging side walls on both upper surfaces of the bottom plate; and a side wall using a forklift that travels between the side walls of a precast floor slab having a three-dimensional intersection road width. It is the approach part construction method of the multilevel intersection road characterized by comprising the process of installing on top.
[0015]
According to the approach construction method for a three-dimensional intersection road, the width of the work zone formed on the road surface can be made smaller than the width of the three-dimensional intersection road, resulting in less traffic congestion during construction. can do.
[0017]
According to such a construction method of a three-dimensional intersection road, the precast floor slab is transferred by a lifting machine that moves a work zone between the bottom slab and the side walls arranged on both upper surfaces thereof, and is placed on the side plate, resulting in traffic congestion. There is no.
[0019]
According to the approach construction method of such a three-dimensional intersection road, the precast floor slab is lifted and disposed on the side wall by a forklift, so that it is possible to prevent traffic congestion and shorten the work period by improving workability.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the approach structure and construction method of a multilevel intersection road according to the present invention will be described with reference to FIGS. 1 to 10. In these drawings, the same reference numerals as those in FIGS. 11 to 17 denote the same names.
[0021]
FIG. 1 is a cross-sectional view of an approach portion D2 (FIG. 12) constituting a three-dimensional intersection road D. The approach portion D2 includes a precast floor slab 6 having the same width as the width W1 of the three-dimensional intersection road D, The bottom plate 7 has a width W3 smaller than the width W1 of the precast floor slab 6 and is disposed at the center of the second road B, and side walls 8a and 8b disposed on the upper surface of the bottom slab 7. Yes. The precast floor slab 6 is preferably configured by continuously arranging a plurality of short unit precast floor slabs 6a to 6n as shown in FIG.
[0022]
When constructing the approach part D2 of such a three-dimensional intersection road D, first, as shown in FIG. 3 and FIG. 4, the lanes a1 and b1 on the inner side of the second road B are displayed using a display device such as a fence 4. Using a part, the work zone 9 is installed at a place where the approach portion D2 is constructed. And the bottom plate 7 is arrange | positioned (FIG. 5), and side wall 8a, 8b is installed in the both-sides upper surface of this bottom plate 7 after that (FIG. 6).
[0023]
While the bottom plate 7 and the side walls 8a and 8b are installed, the short unit precast floor plates 6a to 6n are manufactured at the factory. Then, when the bottom plate 7 and the side walls 8a, 8b are installed in the construction part of the approach part D2, the fence 4 is moved so that the width W4 of the work zone 9 is slightly smaller than the width W1 of the three-dimensional intersection road D. Modify it to be large.
[0024]
Thereafter, the unit precast slabs 6a to 6n (FIG. 2) are carried in between the side walls 8a and 8b, which are the work belt 9, using the second lifting machine 13 (FIG. 9) such as a forklift, and are placed on the side walls 8a and 8b. (FIGS. 7 and 10).
[0025]
More specifically, the installation of the precast floor slabs 6a to 6n will be described. The precast floor slabs 6a to 6n manufactured at the factory as shown in FIGS. Thus, the first lifting machine 12 such as a hydraulic crane is transferred to the second lifting machine 13. The second lifting machine 13 is preferably a forklift.
[0026]
That is, by using a forklift as the second lifting machine 13, the precast floor slabs 6a to 6n can be installed at predetermined positions by running on a work zone between the two side walls 8a and 8b. Increases efficiency.
[0027]
In such a construction method of the approach portion D2 of the three-dimensional intersection road D, when there is a sidewalk outside the second road B, a part thereof, that is, the inside used for installing the work zone 9 is used. If the width of the lanes a1 and b1 is approximately the same as the width of a part of the lanes, two lanes on both sides can be obtained, and traffic congestion due to such construction hardly occurs.
[0028]
Then, when the precast floor slab 6 is installed on the side walls 8a and 8b (FIGS. 7 and 8), the first work zone 9 and the second work zone 10 are expanded to the width W1 of the three-dimensional intersection road D, thereby lane a1. , B1 is temporarily narrowed, but the period is about ¼ of the entire construction period (for example, 4 months), so there is no heavy traffic congestion.
[0029]
【The invention's effect】
As is apparent from the above description, according to the approach structure of the multilevel intersection road and the construction method thereof according to the present invention, the approach section has the same precast floor slab as the width of the multilevel intersection road and the width of the multilevel intersection road is smaller. Since it is composed of a bottom plate with a width and side walls arranged on both upper surfaces of the bottom plate, not only can the construction work period be shortened, but the range of work zones required for the construction is reduced, especially the width. As a result, the traffic congestion can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an approach portion structure of a three-dimensional intersection road according to the present invention.
FIG. 2 is a partially cutaway perspective view of an approach structure of a three-dimensional intersection road according to the present invention.
FIG. 3 is a plan view of a road intersection for explaining a method for constructing an approach portion of a three-dimensional intersection road according to the present invention.
FIG. 4 is an explanatory diagram of a work band forming method in the case where the approach construction method for a multilevel intersection road according to the present invention is carried out.
FIG. 5 is an explanatory diagram of an installed state of a bottom plate when the method for constructing an approach portion of a multilevel intersection road according to the present invention is carried out.
FIG. 6 is an explanatory diagram of the installation state of the side plates in the case where the approach construction method for the multilevel intersection road according to the present invention is performed.
FIG. 7 is an explanatory diagram of a precast floor slab installation state when the method for constructing an approach portion of a three-dimensional intersection road according to the present invention is carried out.
FIG. 8 is an explanatory diagram illustrating the completion of installation of a precast floor slab when the method for constructing an approach portion of a multilevel intersection road according to the present invention is performed.
FIG. 9 is a side view showing an installation state of a precast floor slab when the method for constructing an approach portion of a multilevel intersection road according to the present invention is carried out.
FIG. 10 is a plan view of FIG. 9;
FIG. 11 is a perspective view of a road intersection.
FIG. 12 is a side view of a three-dimensional intersection road.
FIG. 13 is a cross-sectional view of a conventional approach portion of a three-dimensional intersection road.
FIG. 14 is an explanatory diagram of work zone installation in a conventional method for constructing an approach portion of a three-dimensional intersection road.
FIG. 15 is an explanatory diagram of L-type retaining wall installation in a conventional method for constructing an approach portion of a three-dimensional intersection road.
FIG. 16 is an explanatory diagram of embankment in a conventional method for constructing an approach portion of a three-dimensional intersection road.
FIG. 17 is an explanatory diagram of roadbed installation in the conventional method of constructing an approach portion of a three-dimensional intersection road.
[Explanation of symbols]
1a, 1b L-type retaining wall 2 Embankment 3 Road floor 4 Fence etc. 5 Work zone 6 Precast floor slab 7 Bottom plate 8a, 8b Side wall 9 Work zone 11 Truck 12 First lifting machine 13 Second lifting machine

Claims (1)

A bridge portion spanning the intersection of the existing multiple roads intersect in a plane, the approach of the three-dimensional cross road consisting of approach portion which connects the and the bridge portion and the road surface provided on both sides of該橋beam portion In the construction method , a step of forming a work zone using a part of the inner lane on the road surface on which the approach portion is disposed, and a bottom plate having a width smaller than the width of the three-dimensional intersection road on the ground of the work zone. Laying step, placing a side wall on the upper surface on both sides of the bottom slab, and installing a precast floor slab having a three-dimensional intersection road width on the side wall using a forklift that travels between the side walls. A method for constructing an approach section of a three-dimensional intersection road characterized by the above .

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