JP2908888B2 - Floor slab level correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for correcting the level of a structure such as a paving slab made of precast concrete.

[0002]

2. Description of the Related Art As a method for correcting uneven settlement of a pavement slab made of precast concrete, for example, a construction method shown in FIG. 4 is known.

[0003] It is sunken in pavement 1 by puncturing boring machine to Da設concrete panel 4 of the reaction force into the roadbed 2, supporting the pavement 1 via a support bracket 3 which is a support means
When the hydraulic jack 5 </ b > A holds the concrete plate 4, the paving slab 1 is lifted by the reaction force thereof, and the paving slab 1 is lifted.
The filler is injected into the gap generated between the roadbed 2 and the roadbed 2.

[0004] The support fitting 3 comprises a steel pipe 6, a steel plate 7 for supporting the steel pipe 6 on the paving slab 1, and a flange-like member 8 screwed to a lower end of the steel pipe 6. The steel plate 7 is divided into a fan shape, inserted into the excavated portion of the roadbed 2 from the through hole 1A drilled in the pavement plate 1, and fastened to the lower end of the steel pipe 6 while being locked to the lock pin 8A by the flange-shaped member 8. Can be A similar fan-shaped rubber pad 12 is interposed between the steel plate 7 and the paving slab 1.

The hydraulic jack 5A is connected to the cylinder tube 22
The piston 23A housed inside A is driven by the hydraulic pressure supplied to the port 10. Cylinder tube 2
2A supports the paving slab 1 by being screwed into the inner periphery of the steel pipe 6, and the pedestal 9 on which the piston 23A is mounted on the concrete plate 4 by hydraulic pressure supplied to the port 10 from the outside.
When A is pressed, the cylinder tube 22A pushes up the pavement plate 1 via the support fitting 3 by the reaction force. In view of this, a filler is injected from a separately formed grove injection hole into a gap formed between the jacked-up paving slab 1 and the roadbed 2 to support the paving slab 1 at the ascending position. The amount of jack-up is determined by the straw attached to the hydraulic jack 5A.
Detected by the sensor 11 .

[0006]

However, since the support bracket 3 has a complicated structure, it is not easy to assemble the work below the through hole 1A, and it is necessary to separately form holes for jacking up work and grouting work. For example, this method was not efficient enough.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a level adjusting device having a simple structure and easy operation.

[0008]

According to the present invention, there is provided means for supporting a cylinder tube inserted in a through hole formed in a floor slab on the floor slab, and sliding inside the cylinder tube in response to hydraulic pressure supplied from the outside. Slab level correction with a piston to be pressed, a pedestal placed on the foundation below the slab to be pressed by the piston, and a grout pipe to inject filler into the gap between the slab and the foundation In the apparatus, the support means is constituted by a flange pipe previously mounted in a through hole, and the grout pipe is vertically penetrated by a piston, and a hole is formed in the pedestal so as to be continuous with the grout pipe and open below the floor slab. .

The supporting means is constituted by a plurality of members each having an arc-shaped cross section fitted into the through hole and a flange portion extending outside the through hole, and the grout pipe is vertically penetrated by the piston. A hole is formed in the pedestal so as to be open below the floor slab, following the grout pipe.

[0010]

[Function] By supporting the cylinder tube on the flange pipe previously mounted in the through hole, the cylinder tube can be easily supported on the floor slab, and can be filled through the grout pipe penetrated by the piston and the hole of the pedestal. By injecting the material, the filler can be injected from the same through hole as the jack-up.

Further, the supporting means is formed on the existing floor slab by comprising a plurality of members each having an arc-shaped cross section fitted into the through hole and a flange portion extending to the outside of the through hole. Mounting of the support means in the through hole is facilitated.

[0012]

1 to 3 show an embodiment of the present invention.

In FIG. 1, a pavement slab 1 is made of precast concrete, a through hole 1A is formed in advance at a key point, and a flange pipe 20 as a support means having flanges 20A and 20B at both ends is formed in the through hole 1A. It is attached to the circumference. A concrete board 4 for reaction force is cast on the roadbed 2 below the flange pipe 20, and a plate 21 is fixed on the concrete board 4.

The hydraulic jack 5 has a hollow piston 23 slidably housed inside a cylinder tube 22. A flange portion 22A formed at the upper end of the cylinder tube 22 is fixed to the flange 20A of the flange pipe 20 by bolts. Is done.

The piston 23 slides downward by hydraulic pressure supplied through a hydraulic pressure inlet 24. 32 is a cylinder tube 20 for guiding the sliding of the piston 23.
The guide is fixed to the upper end of the piston and slides on the inner periphery of the hollow piston.

A return spring 26 is interposed between the piston 23 and the cylinder tube 22 to hold the piston 23 at the raised position with the oil pressure released.

A flange-shaped pressing member 23A is fixed to the lower end of the piston 23. Further, a grout pipe 27 is erected through the piston 23. Grout pipe 27
Has a lower end screwed into the inner periphery of the pressing member 23A and opens downward.

The pressing member 23A presses the pedestal 9 placed on the plate 21. Grout pipe 27 on pedestal 9
A hole 25 that opens upward relative to the lower end opening is formed. The hole 25 is bent at an angle of 90 ° inside the pedestal 9 and opens on the side surface of the pedestal 9. 31 is a grout pipe 2
This is a seal member attached to the inner periphery of the pressing member 23A so as to seal the joint between the hole 7 and the hole 25.

A notch for guiding the filler discharged from the hole 25 to the lower side of the paving slab 1 is formed at a joint portion of the flange pipe 20 with the flange 20B opposite to the opening of the hole 25 on the side surface of the pedestal 9. 28 are formed.

The upper end of the grout pipe 27 protrudes above the paving slab 1, and a grout introduction port 29 is provided at the protruding portion. A sensing rod 30 is provided above the grout pipe 27 in parallel with the grout pipe 27. Then, a position sensor 33 for detecting a displacement position of the sensing rod 30 is attached to the cylinder tube 22. The grout pipe 27 and the pedestal 9 are covered with a material to which the filler is unlikely to adhere.

Next, the operation will be described. Normally, the flange pipe 20 is covered with a lid (not shown) so as not to hinder the use of the paving slab 1.

When the settlement of the paving slab 1 is to be corrected, the hydraulic jack 5 is transported to the correction location, and the lid is first removed and the pedestal 9 is removed.
Is inserted inside the flange pipe 20 and placed on the plate 21. Next, the flange portion 22A of the hydraulic jack 5 is placed on the flange 20A of the flange pipe 20 and tightened with a bolt (not shown).

Then, a hydraulic power unit is connected to the hydraulic pressure inlet 24 to supply pressure oil into the cylinder tube 22. With this hydraulic pressure, the piston 23 is urged downward, and the pressing member 23A pushes the pedestal 9 to the plate 2 on the concrete board 4.
Press on 1.

The piston 23, which has been prevented by the concrete plate 4 from being displaced downward in response to the supply of the hydraulic pressure, remains at the same position. Conversely, the cylinder tube 22 is displaced upward by the reaction force, and the flange coupled with the bolt is used. The pavement plate 1 is pulled up via the pipe 20.

Since the jack-up amount of the paving slab 1 is obtained by the position sensor 33, jack-up may be performed until this numerical value matches the target level correction amount.

Next, a grout injection unit is connected to the grout introduction port 29, and a filler is injected through the grout pipe 27. The injected filler is filled into the gap between the paving slab 1 and the roadbed 2 through the notch 28 of the flange pipe 20 from the hole 25 opened on the side surface of the pedestal 9.

After the filling is completed, when the filling material reaches a certain strength, the bolt is removed and the hydraulic jack 5 and the pedestal 9 are removed.
When the flange pipe 20 is closed again, the level correction of the paving slab 1 is completed. The hydraulic jack 5 is a flange pipe 20
The level adjustment work can be completed in a short time because the filler can be easily installed and removed, and the filling material can be injected through the same through hole 1A as the jack-up.

FIGS. 2 and 3 show another embodiment of the present invention, in which the supporting means is constituted by supporting members 34 and 35, and the through-hole 1A is provided.
Removably attached to. The support members 34 and 35 are shown in FIG.
As shown in the section A on the left side of the figure, an intermediate portion of an arc-shaped cross section that fits on the inner periphery of the through hole 1A between the flange portion 34A (35A) and the flange portion 34B (35B) extending outside the through hole 1A. 34C (35C).

These support members 34 and 35 are inserted into the through holes 1A immediately before the hydraulic jack 5 is installed, respectively.
Insert the cylinder tube 22 inside the flange 2
The cylinder tube 22 is supported on the paving slab 1 by fastening the 2A to the flange portions 34A and 35A with bolts 36 to engage with the wall surface of the through hole 1A.

In this case, when it becomes necessary to correct the level, the paving slab 1 is pierced to form a through hole 1A, a concrete board 4 is cast from the formed through hole 1A, and then the hydraulic jack 5 is installed. It can be applied to existing pavements. In addition, the flange portion 34B (35B)
May have a conical shape whose outer diameter gradually increases as shown in section B on the right side of FIG.

[0031]

As described above, according to the present invention, the means for supporting the cylinder tube on the floor slab is constituted by a flange pipe mounted in a through-hole, and the filler is injected by using a grout pipe extending vertically through the piston. When it became necessary to fix the level, the hydraulic jack was fixed to the flange pipe to jack up the floor slab, and the filler was injected from the grout pipe between the floor slab and the foundation to raise the level of the floor slab. It can be easily and quickly corrected.

In addition, by using a plurality of members having an arc-shaped cross section provided with a flange portion as the support means, it can be easily applied to an existing floor slab.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a level correcting device according to an embodiment of the present invention.

FIG. 2 is a plan view of a support member showing another embodiment.

FIG. 3 is a longitudinal sectional view of a level correcting device showing another embodiment.

FIG. 4 is a longitudinal sectional view of a level correcting device showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paving slab 1A through hole 2 roadbed 4 concrete bed 5 hydraulic jack 9 pedestal 20 flange pipe 20A flange 20B flange 22 cylinder tube 23 piston 25 hole 27 grout pipe 34 support member 35 support member 34A flange portion 34B flange portion 35A flange portion 35B Flange part

Claims (2)

(57) [Claims] 1. A means for supporting a cylinder tube inserted into a through hole formed in a floor slab on the floor slab, a piston sliding inside the cylinder tube in response to hydraulic pressure supplied from the outside, and a pressure applied to the piston. A slab-level correction device comprising a pedestal placed on a foundation below the slab as much as possible, and a grout pipe for injecting a filler into a gap between the slab and the foundation, wherein the support means is provided in advance. Modification of the slab level characterized by comprising a flange pipe attached to the through hole, penetrating the grout pipe through the piston, and forming a hole on the pedestal that opens below the slab continuously to the grout pipe apparatus. 2. A means for supporting a cylinder tube inserted into a through-hole formed in a floor slab on the floor slab, a piston sliding inside the cylinder tube in response to hydraulic pressure supplied from the outside, and pressing against the piston. A slab level correction device comprising a pedestal to be mounted on a foundation, preferably below the slab, and a grout pipe for injecting a filler into a gap between the slab and the foundation, wherein It consists of a plurality of members each having an arc-shaped cross section fitted into the hole and a flange portion extending to the outside of the through hole, and the grout pipe is vertically penetrated by the piston, and the floor is continuously connected to the grout pipe on the pedestal. A floor-slab-level correction device, characterized in that a hole opening below the plate is formed.