JP2615080B2 - Construction method of inner wall of existing underground tank - Google Patents

Description

The present invention relates to a method for constructing an inner wall of an existing underground tank, and more specifically, to construct a reinforced concrete wall, a steel plate lining wall, etc. for repair inside an existing underground tank. This is related to the method of constructing the inner wall of an existing underground tank.

[Conventional technology] Conventionally, many new underground tanks have been constructed, but there is no example of repairing the inner wall of an existing underground tank. Is beginning to occur.

[Problems to be Solved by the Invention] In the case of a new underground tank, starting with foundation work, bottom plate work, side wall work, and roof work, in order to proceed sequentially, using various large cranes on the ground Although the building materials could be carried directly to the desired location, if the side walls were not to be repaired with new reinforced concrete walls or steel lining walls to repair the existing underground tank, those materials would have been specified on the roof. Is limited to being carried in from the entrance of the container, the material must be once lowered into the existing underground tank and transported to a predetermined position, and the transport of the material in the existing underground tank requires large transport equipment. It is expected to be very difficult because it cannot be used.

In view of the above, in view of the above, the present invention can easily carry materials such as reinforcing bars and steel plates carried into the tank from the ground to a desired position along the inner peripheral surface of the existing underground tank, thereby improving workability and shortening the construction period. The purpose of the present invention is to provide a method of constructing an inner wall of an existing underground tank that can be shortened.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the configuration of the present invention, which is based on the above-mentioned claims, is provided on the upper part of the side habit 1a of the existing underground tank 1 in accordance with the above objects. Bracket 2,2,2 facing inward
Are connected to the upper end of a hanging member 4 having a turnbuckle 3 interposed in the middle of each bracket 2, and the inner peripheral surface of the side wall 1a is connected by the hanging members 4, 4, 4. A hoist crane 6 capable of moving the traveling rail 5 for guiding is disposed on the traveling rail 5, and the traveling rail 5 is provided inside the side wall 1a of the existing underground tank 1. A scaffold 7 along the side wall 1a is disposed further inside than the scaffold 5, a material entrance 9 is provided by a gate frame 8 at an appropriate position below the scaffold 7, and a roof 10 is attached to the existing tank 1 below the entrance 11 by the entrance 11. After building materials such as lining boards suspended inside are taken in between the scaffold 7 and the side wall 1a of the existing underground tank 1 from the material entrance 9, the hoist crane 6 hoists and travels to transport it to a desired site. Technical measures characterized by what we did That.

[Operation] Therefore, in the method of constructing the inner wall of the existing underground tank according to the present invention, for example, the material carried into the center of the existing underground tank 1 is placed on a truck or the like, and the scaffold 7 and the existing underground tank 1
The hoist crane 6 is positioned above the material carry-in port 9 and the material is lifted by the hoist crane 6. 3 is transported in a desired rotational position direction (lateral direction) and a height direction through the space between the base and the side wall 1a of the existing underground tank 1, and the material is lowered on the scaffold 7 or held by the hoist crane 6 in FIG. As shown in (1), installation work such as welding can be performed while being held at the installation position.

In general, it is difficult to carry in the material from the inside to the outside of the scaffold 7. If the material is a large-sized material, it is forced to carry in the material through the upper side or the side of the scaffold 7. However, when the roof is installed, if the material is brought in above the scaffold, it is impossible to carry in the material near the roof.Therefore, there is a method in which the scaffold is arranged only in a predetermined width and moves sequentially. In a complicated process such as inspection of a repaired part, removal of a defective part, etc., a scaffold must be moved to the same place again, and a wasteful process is required. With the installation, even if the scaffold 7 is installed in advance on the entire circumference, it is possible to carry in the material.

The present invention further relates to a bracket 2 in which a turnbuckle 3 is interposed in the middle and a removably connected upper end of a hanger 4 to travel along the inner peripheral surface of the side wall 1a by the hanger 4,4,4. Since the rail 5 is suspended, the bracket 2,
The hoist crane 6 or the construction material conveyed by the hoist crane 6 is moved by a portion protruding from the side wall 1a by a length protruding from the side wall 1a of 2, 2,. Since the rail 5 is a detachable hanging type and the height of the turnbuckle 3 can be adjusted, the workability of installation and removal is improved and simplified.

Embodiment Next, an embodiment of the present invention will be described with reference to an example in which a steel plate is lined in the existing underground tank 1 shown in FIGS. 1 to 4.

In the figure, 1 is an existing underground tank, 1a is its side wall, 1b is a bottom plate, 1c 'is an existing lining steel plate, and 1c is a lining steel plate.

The existing underground tank 1 usually has a side wall 1a made of reinforced concrete, a bottom plate 1b made of a steel plate and an existing lining steel plate 1c 'lined on its inner surface, and a roof truss 12 at a plurality of places is placed on the top thereof to form a roof 10. The roof 10 has a carry-in entrance 11 (placed for use as a doorway for people and materials) and other connection openings 1 in place.
1 ', 11', 11 '・ ・ ・ (for putting in and out of storage, for ventilation,
For measurement, etc.).

According to the method of the present invention, first, as shown in FIG. 2, the brackets 2, 2, 2 facing inwardly above the side wall 1a of the existing underground tank 1.
, And the upper end of a hanging member 4 having a turnbuckle 3 interposed on the bracket 2 is detachably connected to each bracket 2, and the side walls 1a of the side wall 1a are connected by the hanging members 4, 4, 4,. A traveling rail 5 is suspended along the inner peripheral surface, and a hoist crane 6 is provided on the traveling rail 5 so as to be movable with the traveling rail 5 as a guide.

The brackets 2, 2, 2,... Are made of H-shaped steel or the like, and the base end thereof is fixed by selecting a portion where the roof truss 12 is not placed on the upper surface of the side wall 1a, and the tip end is formed by the side wall It protrudes from the inner surface of 1a toward the center of the existing underground tank 1. In fixing the bracket 2, the anchor bolt 21 is used in this embodiment. This anchor bolt 21 is called a chemical anchor, and has a hole 22 previously drilled.
When the filler 23 in which the solidifying agent is separated and stored is filled, and the anchor bolt 21 is inserted, the solidifying agent is mixed with the filler 23 so that the filler 23 is rapidly solidified.
This chemical anchor not only has excellent fixation and pull-out strength after curing, but also can obtain sufficient strength even when water droplets adhere to the inner surface of the hole 22 or oils in the tank have penetrated. Suitable for use in the existing near tank 1 and has sufficient vibration resistance even after curing, and has high durability against vibrations caused by running the hoist crane 6 described later. It is.

The upper hanging member 4 has a bracket piece 2a having a hooking hole (not shown) protrudingly provided on the lower surface of the bracket 2, and a universal joint piece 4a is hung and suspended from the bracket piece 2a. Is a hanging rod 4b, 4c with a turnbuckle 3
The bracket piece 2a is omitted, and a hook hole is directly formed in the bracket 2 or the universal joint piece 4a is omitted, and the upper end of the hanging rod 4a is bent into a hook shape to directly connect the bracket 2 or You may make it hook on the bracket piece 2a.

The lower end of the hanging rod 4c of the hanging tool 4 is connected to a U-bolt 4d connected to the upper surface of the traveling rail 5 via a bracket piece 5a.
The bracket piece 5a and the U bolt 4d
May be omitted, and the lower end of the hanging rod 4c may be welded to the traveling rail 5 or hooked. Since the hanging member 4 may swing about the upper end as an axis, the arm 2 'may be connected to the side wall 1a so that the distance between the traveling rail 5 and the side wall 1a does not change. .

Further, the hoist crane 6 has wheels 6a, 6a, 6a,.
・ The wheels 6a, 6a, 6a
Is rotated by a drive source (not shown) so as to run on the traveling rail 5 for guidance.

Next, according to the present invention, a scaffold 7 is provided along the side wall 1a inside the side wall 1a of the existing underground tank 1 and further inside the traveling rail 5, and a gate form 8 is provided at an appropriate position below the scaffold 7. Material entrance 9 is provided.

Any of the arrangement of the scaffold 7 and the arrangement of the traveling rail 5 to the hoist crane 6 may be performed first.
If it is not possible to dispose the traveling rails 5 and the like without disposing the scaffold 7, the scaffold 7 is disposed first, and if the traveling rails 5 and the like can be disposed without the scaffold 7, the traveling is performed first. The hoist crane 6 may be used as a transfer device for the components of the scaffold 7 when assembling the scaffold 7 by disposing the rails 5 and the like.

The scaffold 7 uses a framed scaffold, and is disposed on the entire inner periphery of the side wall 1a of the existing underground tank 1, and further, although not shown, near the upper end of the side wall 1a. The gate form 8 is a support beam
8a is held by pillars 8b, 8b, and although it is not always clear from the figure, on the upper surface of the support beam 8a, lay a steel square pillar sideways or lay a wooden scaffold board and lay it on it A scaffold will be provided.

Next, according to the present invention, construction materials such as lining boards suspended in the existing underground tank 1 from the entrance 11 of the roof 10 are introduced between the scaffold 7 and the side wall 1a of the existing underground tank 1 from the material entrance 9 described above. Then, the hoist crane 6 is conveyed to a desired site by hoisting and traveling. Since the hoisting crane 6 can be lifted and run at the same time, the building material can be transported the shortest distance along the side wall 1a. After being transported to a predetermined position, as shown in FIG.
When the installation is fixed, the suspension of the building material is released, the running and the rewinding are performed again, and the new building material is transported.

[Effect of the Invention] The present invention is as described above.
The traveling rail 5 is installed at the required height and position without being hindered by the upper structure (roof truss, etc.) of the existing underground tank 1 because it is suspended via 2, 2, 2, ... Further, the construction material taken in between the side wall 1a and the scaffold 7 from the material entrance 9 can be transferred to a desired place with good workability by the hoist crane 6 arranged on the traveling rail 5. It is possible to provide a method for constructing the inner wall of an existing underground tank.

In addition, the present invention detachably connects the upper end of a hanging member 4 with a turnbuckle 3 interposed to each bracket 2 and the inner peripheral surface of the side wall 1a by the hanging members 4, 4, 4. Since the traveling rail 5 along the road is suspended, the installation and removal of the traveling rail 5 can be easily performed by attaching and detaching the hanging member 4, and there is no accompanying difficulty in the construction of the existing underground tank. Can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an existing underground tank under construction of the present invention, FIG. 2 is a sectional view of a main part of an apparatus used in the present invention,
FIG. 3 is a perspective view of an essential part of the operation, and FIG. 4 is a partial front view of a scaffold used in the present invention. 1-Existing underground tank, 2-Bracket, 3-Turnbuckle, 4-Hanging tool, 5-Traveling rail, 6-Hoist crane, 7-Scaffold, 8-Gate form, 9-Material entrance

Claims (1)

(57) [Claims] 1. An inwardly extending bracket 2, 2, 2,... Protrudes from an upper portion of a side wall 1a of an existing underground tank 1, and a suspending tool 4 having a turnbuckle 3 interposed on each bracket 2 is provided. Are detachably connected to each other, and the traveling rails 5 along the inner peripheral surface of the side wall 1a are suspended by the suspenders 4, 4, 4.
A hoist crane 6 capable of moving the traveling rail 5 for guiding is provided on the traveling rail 5. The hoist crane 6 is provided inside the side wall 1 a of the existing underground tank 1 and further inside the traveling rail 5. Of scaffolding 7 along
At the lower part of the scaffold 7, a gate form 8 is used to load materials 9.
After introducing construction materials such as a lining board suspended from the entrance 11 of the roof 10 into the existing underground tank 1 through the material entrance 9 between the scaffold 7 and the side wall 1a of the existing underground tank 1 And a hoist crane 6 for hoisting and transporting the hoist crane 6 to a desired site by hoisting and traveling.