JPH0224965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for repairing the flatness of a prestressed concrete pavement using a prestressed concrete pavement, and a prestressed concrete pavement used in this method.

(Prior Art) On runways, etc., a large number of prestressed concrete pavement slabs are laid down and adjacent ones are connected to form a road surface.

Such prestressed concrete paved roads have the disadvantage that unevenness occurs in each prestressed concrete pavement slab due to factors such as the landing of heavy airplanes and the strength and weakness of the roadbed, which deteriorates the flatness of the road surface.

Conventionally, in such cases, the repair work involved removing the heavy prestressed concrete pavement slab, repairing the roadbed, and then laying the prestressed concrete pavement slab again.

(Problems to be Solved by the Invention) However, such a repair method has the disadvantage that it is very laborious and time consuming and also requires a large machine to remove the prestressed concrete pavement slab.

An object of the present invention is to provide a method for repairing the flatness of a prestressed concrete pavement road that can efficiently lift a prestressed concrete slab and repair the pavement without using a large machine, and a prestressed concrete pavement slab used in this method. .

(Means for solving the problems) The structure of the present invention for achieving the above object is as follows:
An explanation will be given with reference to FIGS. 1 to 4, which correspond to embodiments.

The method for repairing the flatness of a prestressed concrete pavement road according to the first invention includes a method for repairing the flatness of a prestressed concrete pavement slab 1 to be repaired, in which a relative movable part of a jack up tool 16 is inserted into a through hole 4 that is previously provided through the prestressed concrete pavement slab 1 to be repaired in the thickness direction. 17 and with the movable part supported by the roadbed 13, jack up the prestressed concrete pavement slab 1.
The flatness is repaired by injecting the filler 11 into the gap 19 between the roadbed 13 and the roadbed 13 using the same or different through holes 4 or 12 as described above.

In the prestressed concrete pavement slab 1 of the second invention, the jack up aids 3 are incorporated in a plurality of locations in the prestressed concrete pavement board main body 2, and each of the jack up aids 3 is incorporated.
is the prestressed concrete pavement main body 2
A cylindrical body part 5 having a through hole 4 penetrating the body in the thickness direction.
and a bearing pressure part 6 which is integrally provided in the cylindrical part 5 and supports the weight of the prestressed concrete pavement slab main body 2 when jacked up.

(Function) Through holes 4 provided in advance in the jack up aid 3 of the prestressed concrete pavement slab 1
The movable part 17 or 21 of the jack up tool 16
Insert the tip of the movable part 17 or 21 into the roadbed 13
The prestressed concrete pavement slab 1 is jacked up by supporting it. At this time, the bearing pressure part 6 of the jack up aid 3 bears pressure so that the cylindrical part 5 does not slip out of the prestressed concrete pavement slab body 2. A gap 19 between the jacked up prestressed concrete pavement slab 1 and the roadbed 13 is filled with filler 11 using another through hole 12 or 4 or the same through hole 4 to repair the flatness. When using the same through-hole 4, a filler passage 20 is provided in the axis of the jack-up tool 16 to allow filling.

(Example) Examples of the present invention will be described in detail below with reference to FIGS. 1 to 3. As is well known, the prestressed concrete pavement slab 1 of this embodiment mainly includes a prestressed concrete pavement slab main body 2, for example, about 31 m long and 7 m wide, which is formed using concrete and prestressed steel. 2 has a structure in which jack-up aids 3 are built in in advance at intervals of, for example, 3 m in the length and width directions. The jack up aid 3 is the prestressed pavement main body 2
A cylindrical body part 5 having a through hole 4 penetrating the body in the thickness direction.
, a plate-shaped bearing pressure part 6 that is integrally provided in the cylindrical body part 5 and supports the weight of the prestressed concrete pavement slab main body 2 when jacked up, and these cylindrical body part 5 and the bearing pressure part 6 are connected radially. It is composed of reinforcing ribs 7. A female thread 8 is cut into the inner surface of the through hole 4. In the case of this embodiment, the bearing portion 6 is provided on the bottom side of the prestressed concrete pavement slab main body 2, and reinforcing bars 9 are arranged on the cylindrical portion 5. The entrance of the through hole 4 of the cylindrical body portion 5 is normally closed with a cap 10. The prestressed concrete pavement slab body 2 may be provided with other through holes 12 in addition to using the through holes 4 of the jack up tool 3 for filling the filler 11.

Such prestressed concrete pavement slabs 1 are laid on a roadbed 13, and adjacent ones are connected to form a prestressed concrete pavement road 14. At this time, use the jack up aid 3.
A support plate 15 is provided on the roadbed 13 to correspond to the above.

Such prestressed concrete pavement road 14
If unevenness occurs in the flatness of the prestressed concrete pavement slab 1 due to partial subsidence of the roadbed 13 during use, remove the cap 10 of the through hole 4 of the jack up tool 3 at that location and remove the cap 10 of the through hole 4 of the jack up tool 3 at that location. Bolt part 17 as a movable part of
is inserted into the through hole 4, and by turning the handle portion 18, the bolt portion 17 is screwed into the female thread 8 of the through hole 4, and the tip thereof is projected from the lower surface of the prestressed concrete pavement slab 1, and the bolt portion 17 is screwed into the underside of the prestressed concrete pavement slab 1. 13
It is brought into contact with the upper support plate 15. When the bolt part 17 is further screwed in this state, the prestressed concrete pavement slab 1 is jacked up using the support plate 15 as a support point, and a gap 19 is created between it and the roadbed 13. This kind of jack-up work is 1
Perform at one location or multiple locations simultaneously. Once the gap 19 is formed at the required interval, the gap 19 is filled with a filler 11 such as grout using another through hole 12 or 4 or the currently used through hole 4 to repair the flatness.
When using the through hole 4 in use, insert the through hole 2 into the axis of the bolt part 17 of the jack up tool 16.
0 is provided, and the filler 11 is inserted from this through hole 20.
Perform filling. The jack up tool 16 is then removed.

As shown in FIG. 4, as a jack up tool, a hydraulic cylinder is also used, and its piston rod (movable part) 21 is inserted into the through hole 4, and the cylinder body 22 is screwed into the end of the cylindrical body part 5. You can also jack it up.

(Effects of the Invention) As explained above, the method for repairing the flatness of a prestressed concrete pavement according to the present invention involves inserting a jacking tool into a through hole previously provided in a prestressed concrete pavement slab, and adjusting the relative movable parts. The prestressed concrete pavement slab is jacked up with its tip supported on the roadbed, and the gap created between the prestressed concrete pavement slab and the roadbed is filled with a filler material from the above-mentioned through hole or another through hole to repair the flatness. Therefore, there is no need to peel off the prestressed concrete pavement slab during repairs, and repair work can be carried out in a shorter time and with less effort than before. Furthermore, since the present invention uses a jack-up tool, repair work can be performed without requiring a large machine such as a crane truck.

Next, in the prestressed concrete pavement slab of the present invention, the jack-up aids are dispersed and incorporated in the prestressed concrete pavement slab body in advance, so that the jack-up tool can be easily penetrated and the jack-up work can be performed easily. Can be done. Moreover, since the jack up tool is provided with a cylindrical body part, the reaction force at the time of jacking up can be received by the cylindrical body part, and the prestressed concrete pavement slab main body can be protected.
Furthermore, since the jack-up tool has an integral bearing pressure part in the cylindrical body part, it is possible to prevent the cylindrical body part from slipping out from the prestressed concrete pavement slab main body during jack-up.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an example of the implementation state of the method of the present invention, Fig. 2 is a plan view of the jack up aid used in this example, and Fig. 3 is an outline of the prestressed pavement version of this example. Fig. 4 is a longitudinal sectional view of another example of the jack up tool in use. 1... Prestressed concrete pavement version, 2
... Prestressed concrete pavement version main body, 3
...Jacket lift aid, 4...Through hole, 5...
... Cylinder body part, 6 ... Bearing pressure part, 11 ... Filler material, 12
...Through hole, 13... Roadbed, 16... Jacketing tool.

Claims (1)

[Scope of Claims] 1. A method for repairing the flatness of a prestressed concrete pavement road formed by laying a plurality of prestressed concrete pavement slabs on a roadbed, in which the prestressed concrete pavement slabs to be repaired are penetrated in the thickness direction. Insert the relatively movable part of the jack-up tool into the pre-prepared through-hole, then jack up the prestressed concrete pavement slab with the tip of the movable part supported by the roadbed. A method for repairing the flatness of a prestressed concrete pavement road, which is characterized by repairing the flatness of a prestressed concrete pavement by injecting a filler into the gap between the roadbed and the roadbed. 2. Jacket up aids are built in and distributed at multiple locations in the prestressed concrete pavement slab body, and each of the jack up aids has a through hole that penetrates the prestressed concrete pavement slab body in the thickness direction, and a support that receives the reaction force of the jack up tool. A prestressed concrete pavement plate used in a method for repairing the flatness of a prestressed concrete pavement road, characterized in that it is provided with a pressure section and a pressure section.