JPS5940398Y2 - Underground object lifting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lifting device used to lift up and remove underground objects such as hand hole structures buried underground.

In recent years, with the expansion and renovation of telephone lines in cities, there has been an increase in the work to remove handhole structures, etc., which have artificial lids on road surfaces for inspection or work, and whose main bodies are buried underground.

Conventionally, handhole structures and the like have been removed using a method of driving earth retaining piles up the road, piling them down, and then breaking the handhole structures into small pieces with a breaker or the like, destroying them, and then removing the fragments.

This method creates noise and noise during pile driving and breaker work.
Since vibrations and dust are generated, environmental pollution becomes a problem, nighttime construction is avoided, construction time is long, and the hand hole structure cannot be reused.

The present invention eliminates these problems and provides a device for lifting and removing underground objects such as handhole structures without generating noise or vibration.

The drawings will be explained in detail below.

FIG. 1 shows an embodiment of the device of the present invention, in which a hand hole structure is pulled up.

The hand hole structure 1 to be removed is as shown in Fig. 2, which is a cross-section of the long side of the hand hole structure.
It is usually made of concrete and has the shape of a rectangular parallelepiped box with a bottom, and circular holes are provided on both short sides of the structure to connect underground conduits through which telephone lines and the like are inserted.

Although not shown in the figure, the top surface of the structure is sealed with a metal lid.
The upper surface of this lid body is made to be approximately flush with the ground surface, so that it does not pose a hindrance to traffic.

In the figure, fluid pressure generated by a fluid pressure generating device 3 that generates fluid pressure is guided through a pressure resistant pipe 4 to a fluid pressure regulating device 5 that adjusts the fluid pressure, and from the fluid pressure regulating device 5 to a pressure resistant pipe 4. is guided to a plurality of fluid pressure jacks 6, and drives each fluid pressure jack 6 evenly in a vertical direction above the ground surface.

The plurality of fluid pressure jacks 6 are placed near the four corners of the handhole structure 1 to be lifted up and removed.

The hanging frame 7 is configured to match the shape of the underground object to be lifted, such as a rectangular shape when used for lifting a rectangular handhole structure.

The hanging frame 7 is made of metal and has a square or U-shaped cross section, and if it is rectangular, there are metal pipes at the four corners with dimensions that allow the top of the fluid pressure jack 6 to be easily inserted downward. Weld 8.

By inserting the metal pipe 8 into the top of each of the fluid pressure jacks 6, the fluid pressure jacks 6
As the hanging frame 7 is extended upward by the fluid pressure, the hanging frame 7 is pushed up in a direction perpendicular to the ground surface without shifting from side to side.

Next, the procedure for removing the handhole structure using the underground object lifting device according to the present invention will be described.

3. Drill a hole H on both sides of the long side of the hand hole structure 1 using an appropriate method to make a hole H large enough to allow the support metal fitting 2 to be inserted therethrough.3. Wrinkle.

As mentioned above, holes for connecting underground pipes are provided on both side walls of the short side of the hand hole structure 1, so using these holes, support is provided in the same manner as used for both side walls of the long side. Insert hardware 2.

This operation completes the preparation for lifting.

One end of the plurality of hanging tools 9 is fixed to two orthogonal supporting metal fittings 2 inserted through the opposite side wall surfaces of the hand hole structure 1, and the other end of the plurality of hanging tools 9 is fixed to each hanging tool 9 evenly. It is fixed to the hanging frame 7 so that a load is applied to it.

It is appropriate to use a wire rope or the like as the hanging device 9.

Handhole structure 1 buried underground through the above steps
is mechanically connected to the fluid pressure jack 6 by the support hardware 2, the hanging tool 9, and the hanging frame 7.

In this state, if the fluid pressure jack 6 is driven by fluid pressure in a direction perpendicular to the ground, the handhole structure 1 to be pulled up and removed will be pulled up in the vertical direction against the surrounding earth pressure.

As explained above, the device for lifting underground objects according to the present invention does not generate noise or vibration during operation, allows easy preliminary work on the handhole structure, and can be lifted up and removed without crushing the handhole structure.

Therefore, compared to conventional methods, this method has the advantage of shortening the working time and causing less environmental pollution such as noise.

For example, it usually takes about 10 minutes to drill holes H in both side walls of the hand hole structure, and the total time required for removal can be reduced to about 30 minutes, which is about % of the conventional method.

Furthermore, since the removed handhole structure can be reused, there is a great benefit in terms of resource conservation.

In addition, when the shape of the underground object is cylindrical, the hanging frame can be assembled in a circular shape, and the number of fluid pressure jacks can be three.

[Brief explanation of the drawing]

FIG. 1 is a perspective system diagram showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the handhole structure and the device according to the present invention installed on the ground surface. 1...Hand hole structure, 2...Support hardware, 3...Fluid pressure generator, 4...
・Pressure-resistant pipe, 5...Fluid pressure adjustment device, 6...
...Fluid pressure jack, 7...Hanging frame, 8
...Metal pipe, 9...Hanging tool.

Claims (1)

[Scope of utility model registration request] a fluid pressure generating device; a pressure regulating device coupled to the fluid pressure producing device for regulating fluid pressure generated by the fluid pressure producing device; a plurality of pressure regulating devices coupled to the pressure regulating device so as to be driven by the fluid pressure; It consists of a fluid pressure jack, a hanging frame supported by the fluid pressure jack, and a lifting tool for lifting underground objects. An underground object lifting device configured to pull up underground objects.