JPH05247957A - Level corrector for structure - Google Patents

Abstract

PURPOSE:To make correcting operation easier by a method in which supporters, a support pipe projected into a through hole, and an oil-pressure jack to press the support pipe downwards are provided to an arced cross-sectional part with a flange, and the supporters are jacked up integrally with the stab. CONSTITUTION:A through hole 1A is formed in paving boards 1, and base concrete 4 as base for reaction is placed below the hole 1A. When correcting the subsidence of the board 1, an arced hook plate 20 as supporter is attached to the hole 1A, flanges 20A and 20B are attached in a mutually facing manner by lapping them with the edges of the board 1, and a flange pipe 24 is inserted into the plate 20 to fix the board 1. A support metal 26 and a support pipe 27 are inserted and a lock screw 29 is coupled with the inside of the pipe 24 to clamp them. An oil-pressure jack 32 is attached to the cross plate 31, and the rod 34 is extended to press the concrete 4 through the metal 26, where the reaction acts upwards on the oil-pressure jack 5 to lift up the paving board 1. By lifting the boards 1 to a proper level, a grout is injected into the space between the subgrade 2 and the board 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level correcting means for a structure such as a pavement 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, a construction method as shown in FIG. 4 is known.

In this, a through hole is formed in a submerged paving slab 1, a base concrete 4 for reaction force is placed in a roadbed 2 below the paving slab 1, and the paving slab 3 is supported through a support metal fitting 3 as a supporting means. The hydraulic jack 5 supported by 1 presses the base concrete 4 to lift the paving slab 1 by its reaction force, and injects the filler into the gap created between the paving slab 1 and the roadbed 2.

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

The hydraulic jack 5 drives the piston 23 housed inside the cylinder tube 22 by the hydraulic pressure supplied to the port 10. The cylinder tube 22 is supported on the paving slab 1 by being screwed onto the inner circumference of the steel pipe 6, and when the piston 23 presses the pedestal 9 placed on the base concrete 4 by the hydraulic pressure supplied from the outside to the port 10. The reaction force causes the cylinder tube 22 to push up the paving slab 1 via the support fitting 3. Therefore, a filling material is injected from a separately formed grout injection hole into a gap formed between the jacked-up pavement plate 1 and the roadbed 2 to support the pavement plate 1 at the raised position. In addition, the jack-up amount is determined by the throttle sensor 11 attached to the hydraulic jack 5.
Detected by.

[0006]

However, since the supporting metal fitting 3 has a complicated structure, it is not easy to assemble it below the through hole 1A, and this construction method cannot be said to have sufficiently high working efficiency.

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 are provided a plurality of supporting members each having an arcuate cross section having flange portions at both ends, which are fitted into the through holes formed in the slab of the structure, and a foundation below the through holes. A support pipe that abuts and projects into the through hole, and a hydraulic jack that is supported above the through hole by the support member and presses the support pipe downward are provided.

[0009]

When the hydraulic jack supported by the support member presses the support pipe, the support member supporting the hydraulic jack is jacked up integrally with the slab by the reaction force exerted by the foundation via the support pipe.

Further, since the hydraulic jack may be provided outside the through hole, it can be easily moved. Further, since the supporting member having the arc-shaped cross section and the flange portion is fixed to the through hole, it can be applied to the existing slab.

[0011]

1 to 3 show an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a pavement plate made of precast concrete as a slab, in which a through hole 1A is formed in advance at a required position, and a base concrete 4 is used as a base for reaction force on a roadbed 2 below the through hole 1A. Has been placed.

A pair of hook plates 20 are mounted opposite to each other on the inner periphery of the through hole 1A as support members.

The hook plate 20 has flanges 20 at both ends.
It is a member having an arcuate cross section in which A and 20B are formed, and these flanges 20A and 20B are mounted so as to face the inner circumference of the through hole 1A so as to overlap the edges of the pavement plate 1. A rubber plate 35 is attached to the contact surface of the flange 20B with the pavement plate 1.

A flange pipe 24 is inserted inside the hook plate 20. A flange 24A that overlaps the flange 20A of the hook plate 20 is formed at the upper end of the flange pipe 24. The flange pipe 24 and the hook plate 20 are fixed to the pavement slab 1 by bolts 21 (only the center line is shown in the figure) penetrating the flange 24A and the flange 20A.

A support pipe 27 is inserted inside the flange pipe 24. The lower end of the support pipe 27 is in contact with the base concrete 4 via the support fitting 26.
In addition, a pressing portion 27 that contacts the hydraulic jack 32 is provided at the upper end.
A is formed in the transverse direction.

A lock piece 28 is fixed to the outer periphery of the upper portion of the support pipe 27. The lock screw 29 screwed onto the inner circumference of the flange pipe 24 is the lock piece 28.
The support pipe 27 is held between the base concrete 4 and the upper surface of the base concrete 4 by being brought into contact therewith.

A tension bolt 30 is erected on the flange 24A of the flange pipe 24, and a hydraulic jack 3 is mounted on a cross plate 31 supported by the tension bolt 30.
Two are supported.

The hydraulic jack 32 is provided with a rod 34 protruding downward from a jack cylinder 33 fixed to the cross plate 31, and the support pipe 27 is pushed downward by the rod 34.

Next, the operation will be described.

At any time, the through hole 1A is covered with a lid (not shown) so as not to hinder the use of the paving slab 1.

When the subsidence of the paving slab 1 is to be corrected, the lid is removed, and the hook plate 20 is first mounted inside the through hole 1A as shown in FIGS.

Next, the flange pipe 24 is inserted inside the hook plate 20, and is fastened to the paving plate 1 together with the hook plate 20 by the bolt 21.

Then, the support fitting 26 and the support pipe 2
7 is inserted into the through hole 1A from the opening of the flange pipe 24 as shown in FIG. Further, the lock screw 29 is screwed onto the inner circumference of the flange pipe 24, and is tightened until the lower end comes into contact with the lock piece 28 of the support pipe 27.

Then, the hydraulic jack 5 is attached to the cross plate 31 formed on the flange pipe 24.

Then, hydraulic pressure is supplied to the hydraulic jack 5 to drive the rod 34 to extend. When the extending rod 34 presses the pressing portion 27A of the support pipe 27, this force presses the base concrete 4 via the support pipe 27 and the support fitting 26, and the reaction force causes an upward force to act on the hydraulic jack 5. .. This force is the cross plate 31,
The paving slab 1 is lifted via the tension bolt 30 and the hook plate 20.

When the level of the pavement slab 1 around the through hole 1A is raised to a proper level in accordance with the extension of the rod 34, the injection hole separately formed in the pavement slab 1 creates a gap between the roadbed 2 and the pavement slab 1. Inject grout.

Although the lock screw 29 is separated from the lock piece 28 as the pavement plate 1 rises, if the lock screw 29 is re-tightened at the raised position of the pavement plate 1 and brought into contact with the lock piece 28, the pavement plate 1 Is supported by the support pipe 27 via the lock screw 29 and the lock piece 29 without using the hydraulic jack 5, so that the pavement slab 1 does not sink even if the hydraulic pressure of the hydraulic jack 5 is removed.

For this reason, the hydraulic jack 5 can be removed prior to the injection of grout, whereby the work of the other through hole 1A can be started quickly. Since the hydraulic jack 5 is arranged outside the through hole 1A, it can be easily attached and detached. The hook plate 20, the flange pipe 24, the lock screw 26, the support pipe 27, and the support fitting 26 may be removed after the completion of the grout injection. In this way, the level of the paving slab 1 can be corrected efficiently.

Since the hook plate 20 is detachably attached to the through hole 1A, it can be applied to an existing slab by forming the through hole 1A.

[0031]

As described above, according to the present invention, a plurality of supporting members having an arcuate cross section having flange portions at both ends are attached to the through holes formed in the slab of the structure, and the supporting members form the through holes. The hydraulic jack supported above presses the foundation below the slab via the support pipe, and the reaction force that the foundation exerts on the hydraulic jack pushes up the slab via the support member, so that the level of the sinking structure Can be efficiently corrected with a simple configuration. It can also be applied to existing structures.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a level correction device showing an embodiment of the present invention.

FIG. 2 is a plan view of a through hole showing how the hook plate is attached.

FIG. 3 is a plan view of the through-hole showing how the hook plate is mounted, as in the case of FIG.

FIG. 4 is a vertical cross-sectional view of a level correction device showing a conventional example.

[Explanation of symbols]

 1 Pavement Plate 1A Through Hole 2 Roadbed 4 Base Concrete 5 Hydraulic Jack 20 Flange Pipe 20A Flange 20B Flange 27 Support Pipe

Claims (1)

[Claims] 1. A plurality of supporting members having arcuate cross-sections having flange portions at both ends, which are fitted into through holes formed in a slab of a structure, and abutting against a base below the through holes to project into the through holes. And a hydraulic jack that is supported by the support member above the through hole and presses the support pipe downward.