JPH0428844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for jointing a precast pavement plate to an existing concrete pavement, which is performed when expanding or partially repairing a paved surface in roads, airports, etc.

(Conventional technology) Conventionally, precast concrete pavement (hereinafter referred to as
This is the 6th joint construction method for PC pavement version).
As shown in the figure, connect the PC paving plate 1 to its joint end surface 2.
An arc-shaped connecting hole 4 is provided in the upper surface 3 and the PC pavement plate 1 to be jointed.
After joining the joint end surfaces 2, 2 of 1, insert the arc-shaped connecting steel bar 5 from the opening on the upper surface of the PC paving plate in one of the connecting holes 4, and insert it into the connecting holes 4, 4.
Straddle the PC pavement plates 1 and 1, then connect the holes 4,
A method (Japanese Patent Publication No. 59-47084) is known in which a filler 6 is injected into the inside of the filler 6.

In addition, as shown in FIG. 7, linear connecting holes 7a and 7b are formed in the joint end surfaces 2 and 2 of the PC paving slabs 1 and 1 so as to communicate with each other, and one of the connecting holes 7a is made longer than the other. , with the straight connecting steel bar 8 accommodated in the connecting hole 7a on the longer side, both PCs are connected.
The pavement plates 1 and 1 are joined together, and then, as shown in FIG. 8, the connecting steel bar 8 is moved to a position spanning the other connecting hole 7b using the flexible wire rod 9, and then filler is injected. A method (Japanese Patent Publication No. 60-22123) is known.

(Problems to be Solved by the Invention) The conventional methods described above are all aimed at jointing between PC pavement slabs, and were developed for the purpose of jointing existing concrete pavement slabs and newly installed PC pavement slabs. In particular, the method of using arc-shaped connecting holes and connecting steel bars shown in Figure 6 is difficult to drill in the existing concrete pavement, so it is difficult to use when expanding or repairing the pavement. However, there is a problem in that it cannot be used for joints between existing concrete pavement and new pavement.

On the other hand, as shown in Figures 7 and 8, straight connecting holes of different lengths are provided on both joint surfaces, and a connecting steel bar is accommodated in the longer connecting hole. The method of moving the connecting steel bar to a position spanning both PC pavement slabs after joining is troublesome work to move the connecting steel bar in a connecting hole that is closed at both ends, and if there is a slight deviation in the position of the connecting hole, the problem may occur. In some cases, there is a problem in that the connecting steel bar becomes immovable.

In view of the above-mentioned conventional problems, the present invention aims to provide a method for jointing a pavement slab suitable for laying a PC pavement slab continuously on an existing concrete pavement.

(Means for Solving the Problems) The gist of the present invention is to solve the above-mentioned conventional problems and achieve the intended purpose. One end of an arc-shaped connecting hole with the end opened on the surface of the PC pavement slab is left open, and the PC
A linear connecting hole is drilled in a position that communicates with the opening of the connecting hole on the joint end surface of the pavement slab, and then the PC pavement slab is laid on the existing concrete pavement with the joint end surface facing each other. , Insert the connecting steel bar into the connecting hole through the opening on the surface of the PC pavement slab, and fill the connecting holes with the connecting steel bar spanning the existing concrete pavement and the PC pavement slab. The method consists in burying and fixing the connecting steel bar by injection.

(Function) In this joint method, the PC pavement plate is
Since it is newly manufactured at a location other than the installation site, forming an arc-shaped connecting hole from the surface to the joint end face can be easily done by burying a core such as an arc-shaped pipe and pouring concrete. . In addition, since existing concrete pavements are constructed by drilling holes horizontally in the joint end faces to form connecting holes, desired holes can be easily formed at accurate positions.

Furthermore, since the connecting holes are continuously opened from the surface of the PC paving slab to the joint end surface, insertion of the connecting steel bars is possible even if the centers of the connecting portions of both connecting holes are slightly shifted. Furthermore, the connecting steel bars are arranged approximately horizontally at the connection between the PC pavement slab and the existing concrete pavement, so that the vertical load applied from the top surface is transmitted evenly.

(Example) Next, an example of the present invention will be described with reference to FIGS. 1 to 5.

In the figure, 10 is the PC pavement to be laid, and 11 is the existing concrete pavement.
The PC paving slab 10 is manufactured in advance at a factory or the like, and connecting holes 12 are opened in the joint end surface 10a around it. The other end of this connecting hole 12 is opened on the surface of the PC paving slab 10,
The whole has an arc shape so that the joint end surface side opening 12a faces in a substantially horizontal direction. When forming this connecting hole 12, as shown in FIG. 1, an arc-shaped cylinder 13 made of synthetic resin is embedded, and the inside of the cylinder 13 forms the connecting hole 12. In addition to this, a core (not shown) may be inserted, concrete is poured, and the core may be taken out after demolding.

Prior to laying the PC pavement slab 10, as shown in FIG.
A connecting hole 14 is bored in a. This connecting hole 14
Connection end side opening 1 of connecting hole 12 of PC pavement plate 10
Using a drilling machine such as a core cutter, holes are made in substantially horizontal positions at positions corresponding to the height and spacing of 2a. Moreover, a grout hole 15 is opened from the surface of the concrete pavement 11 above the innermost part of the connecting hole 14.

After drilling the connecting holes 14 in the existing concrete pavement 11, the PC pavement slab 10 is installed in a predetermined position.
When installing, both joint end surfaces should have a joint gap between 10a and 11a, and the connection hole 1 between the two should be
2 and 14 are arranged so as to face each other in a concentric arrangement and have heights.

In addition, by making the surface heights of the PC pavement slab 10 and the existing concrete pavement 11 equal, the connecting holes 14 are opened in advance so that the heights of both connecting holes 12 and 14 are the same. .
The height of the PC paving slab 10 can be set by placing protrusions on the peripheral surface of the PC paving slab 10, for example, as shown in FIG.
6 is fixed using bolts 17, and this projecting piece 16 is placed on the surface of the existing concrete pavement 11.

After installing the PC pavement version 10 in this way,
The connecting steel bar 1 is inserted through the opening 12b on the front side of the connecting hole 12.
Insert 8. The connecting steel bar 18 has its tip abutted against the innermost end of the connecting hole 12 of the existing concrete pavement 11, and its approximate center is located at both joint end surfaces 1.
It is formed to have a length located at an intermediate position between 0a and 11a, and an anti-rust paint 19 is applied to the central position.

After inserting the connecting steel bar 18, the filler 20 is injected into the connecting holes 12 and 14 using the grout hole 15 and the surface side opening 12b of the connecting hole 12, and is solidified with the connecting steel bar 18 embedded therein.

In addition, the space between the joints is filled with expansion joint material 21,
Also, the space between the PC pavement version 10 and the foundation roadbed 22
23 is filled with sand or mortar grout.

In addition to the above, the present invention also includes drilling a connecting hole 14 whose rear side is slightly upwardly inclined at the joint end surface of the existing concrete pavement 11 as shown in FIG. A connecting steel bar 18 having an arc shape as a whole may be inserted across the connecting hole 12. Whether the connection hole 14 is inclined in this manner or horizontally as described above is appropriately selected depending on the presence or absence of steel materials such as tie bars in the vicinity of the joint end surface 11a in the existing concrete pavement 11.

(Effects of the Invention) The method of jointing a PC pavement slab to an existing concrete pavement according to the present invention is configured as described above, and the existing concrete pavement and the PC pavement slab are connected by being buried consecutively in connection holes formed respectively. The joints are firmly connected through the steel bar, and the vertical load is transmitted smoothly, creating a joint that does not create a step in the connecting part.

In addition, since it is only necessary to drill horizontal connecting holes in the joint end faces of the existing concrete pavement, the drilling work is simple and the accuracy of the opening position can be increased. Furthermore, since the connecting steel bars are oriented substantially horizontally in the connecting portion, stress is evenly transmitted in the horizontal direction, and a structure that can withstand large loads without local stress concentration can be obtained.

Furthermore, since one end of the connecting hole into which the connecting steel bar is inserted is opened on the surface of the PC paving slab, it is possible to forcefully insert the steel bar even if there is a slight step in the connecting hole. This has the effect of ensuring that the steel bar is inserted securely.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a structure jointed by the method of the present invention, Figs. 2 to 4 are sectional views showing intermediate steps, Fig. 5 is a sectional view of another implementation side, and Fig. 6 is a conventional method. Figures 7 and 8 are cross-sectional views showing other conventional joint processes. 10...PC pavement version, 10a...joint end surface, 1
1... Existing concrete pavement, 11a... Joint end surface, 12... Connecting hole, 14... Connecting hole, 16...
Projection piece, 17... Bolt 18... Steel bar for connection.

Claims (1)

[Claims] 1 Open one end of an arc-shaped connecting hole with the other end open to the surface of the precast concrete pavement slab to the joint end face of the precast concrete pavement slab to be laid, and join the precast concrete pavement slab. Drill a straight connecting hole in the joint end surface of the existing concrete pavement slab at a position that communicates with the opening of the connecting hole in the joint end surface of the precast concrete pavement, and then install the precast concrete pavement slab. Lay the concrete pavement with their joining end faces facing each other, insert a connecting steel bar into the connecting hole from the opening on the surface of the precast concrete pavement, and connect the connecting steel bar to the existing concrete pavement and precast concrete. A method for jointing a precast concrete pavement slab to an existing concrete pavement, characterized in that the connecting steel bar is buried and fixed by injecting a filler into both connecting holes while straddling the pavement slab.