JP3020882B2 - Construction method of building structure with underground space - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a building structure having an underground space, and more particularly to a technique for constructing a parking facility having an underground space capable of parking a vehicle.

[0002]

2. Description of the Related Art With the spread of automobiles, it has become more and more necessary to secure parking lots. In particular, in urban areas, the lack of land for parking lots is serious, and the construction of parking lots capable of three-dimensional parking is being promoted. However, in the construction of a conventional multi-story parking lot, generally, as shown in FIG. 5, a large number of sheet piles (sheet piles) 1 are driven into the ground, and
After excavating the inside of the frame sectioned by the top pile 1, bridging a beam (cut beam) (not shown), raising the belly 2 and preventing the sheet pile 1 from falling down, the reinforcing bars 3 are arranged, and the mold is formed. The frame 4 is assembled, and a concrete material is poured by so-called cast-in-place, a concrete is cast, and then the formwork 4 is removed, the sheet pile 1 is pulled out, and the cutting beam is removed. It is performed as the main process. Therefore, hundreds of sheets
It is necessary to drive the pile, which requires not only a long working time, but also pollution due to noise and vibration, and the sheet pile needs to be pulled out from the ground after use. Not only does the work take a great deal of time, but the pulling-out work requires a great deal of labor one by one. In addition, since the reinforcement is arranged, the formwork is assembled, and the concrete is poured on site by pouring the concrete material, it takes a lot of time to construct, and the work in the excavated space is difficult, and the scaffold is formed. Is required, and the operation requires a lot of manpower. In addition, it is necessary to remove the formwork after use, and the removal work also requires a great deal of labor. In the conventional work, the construction cost of a parking lot is high. On the other hand, in order to shorten the construction period as described above, when constructing an underground parking lot, a precast molded concrete body (including a reinforced concrete construction) is used.
And a multi-story parking lot is constructed by a prefabricated method (Japanese Patent Application Laid-Open Nos. 7-292695, 47-11622, 4-68175, 1-154969, 1-154969, etc.). Japanese Unexamined Patent Publication (Kokai) No. 3-67972 and Japanese Unexamined Patent Publication (Kokai) No. 3-31656). However, even with these conventional methods, there is a problem in embedding the concrete body,
There is a problem in that the concrete body is properly positioned and installed, and furthermore, there is a problem in its workability and shortening of work, for example, the block is preliminarily assembled into a wall shape and then pressed down and settled. There is.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique capable of solving the drawbacks of the prior art. The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0004]

According to the present invention, a prestressed concrete member having a blade portion and a positioning portion can be mounted, and the prestressed concrete member can be installed underground. Equipment that can be removed from the ground after installation (hereinafter referred to as cutting jig)
Then, a prestressed concrete member is attached and excavation is performed. With the prestressed concrete member attached, the device is advanced into the ground with the help of the excavation operation of the blade, and at a predetermined depth. The prestressed concrete member is removed from the device, and the prestressed concrete member is positioned by the positioning portion of the device.
Pertaining to a construction method of a building structure having an underground space including lifting the device upward and removing the device from the ground after installing a plurality of the members at a predetermined position in the ground. It is.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

[0006]

1A, a prestressed concrete member 5 is mounted on a cutting jig 6. As shown in FIG. The cutting jig 6 includes a column 7 and an arm 8 laid on the column 7.
And a blade portion arm 9 and a blade portion 10. The horizontal arm 8 is provided at an appropriate position of the support column 8 with an appropriate interval up and down. In the present embodiment, an example is shown in which two horizontal arms 8 are installed vertically. These upper and lower horizontal arms 8 can be separated at their respective centers. When using the cutting jig 6, the left and right horizontal arms 8
Are connected at the center by bolts 11 or the like. The vicinity of the center of the horizontal arm 8 is fixed by a fixing member 12. When the fixing member 12 is used, the pin, the bolt 11
And so on. The upper and lower horizontal arms 8 are movably connected at the center, for example, are movable about the connecting bolt 11 axis. An arm 9 for a blade portion is attached to a lower portion of the left and right arms of the lower horizontal arm 8. A blade (cutting edge) 10 is attached to the tip of the blade arm 9. These blade section arms 9 are rotatable around, for example, the connecting bolt 13 axis.

[0007] The prestressed concrete member 5
Are mounted on each of the left and right columns 7 in this embodiment. The prestressed concrete member 5
For example, a material made of steel and concrete can be used. Use a preformed material at a factory or the like in advance. As the prestressed concrete member 5, for example, a plate-shaped member is used. As shown in FIG. 2, the prestressed concrete member 5 can be used with its end cut off in a quadrilateral shape. The prestressed concrete member 5 constitutes, for example, both side walls of a parking pit as described later. The prestressed concrete member 5 has its lower part cut out as shown in the figure.
If a part of the rebar is left exposed, a floor arrangement with a floor part is connected to the exposed rebar when constructing a floor part having a drainage groove in a later process, which is useful for the construction. be able to. The horizontal arm 8 of the cutting jig 6 may be configured to have a width that takes into account the length of the vehicle body parked on both side walls of such a parking pit.
It is preferable that the length can be appropriately changed.

As shown in FIG. 2, a positioning portion 14 is provided on the column 7 of the cutting jig 6. In this embodiment, an example is shown in which a female positioning portion 14 is provided on one side and a male positioning portion 14 is provided on the other side. One example of the female-type positioning portion 14 is configured as a C-shaped rail as shown in the figure, and is provided along the support 7. The male positioning portion 14 is configured in a form that can be fitted to the C-shaped rail.

As shown in FIG. 2, a plurality of cutting jigs 6 are used, and a female positioning part (C-type rail) 14 of one cutting jig 6 and a male positioning part 14 of the other cutting jig 6 are used. (C
(Mold rail fitting portion) 14. As a result, the prestressed concrete member 5 can be properly positioned and can be installed without any deviation, and the workability can be remarkably increased by these fittings.

As shown in FIG. 3, when the parking lot 15 is constructed, a measure is taken to prevent the prestressed concrete member 5 from falling down. As an example of the lodging prevention treatment, for example, as shown in the drawing, the cutting beam 17 may be laid across the cutting beam attaching member 16. The girder 17 is also useful for the construction of the floor of the parking lot pit.

After rough digging of an appropriate depth from the ground (GL), the digging is performed by a digging machine (not shown).
After reaching a predetermined depth, the prestressed concrete member 5 is properly positioned as described above, and after taking measures to prevent lodging, as shown in FIG. The horizontal arm 8 is pulled upward, and the prestressed concrete member 5 is removed from the cutting jig 6. That is, as described above, the upper and lower horizontal arms 8 of the cutting jig 6 are movably connected at the center and are movable about the connecting bolt 11 axis. For example, when the pin and the bolt 11 at the end of the fixing member 12 are pulled out and the upper horizontal arm 8 is pulled upward, the upper horizontal arm 8 protrudes upward, and accordingly, the lower horizontal arm 8 is similarly raised. The blade portion arm 9 is pivoted inward and the prestressed concrete member 5 can be removed. INDUSTRIAL APPLICABILITY The present invention is suitable for constructing a parking lot having a relatively shallow excavation depth of about 2 to 3 m.

The main construction method according to the present invention is as described above. However, water leakage treatment by applying a sealing material at a connection portion between the prestressed concrete members 5, formation of a floor, construction of a drainage trench, plastering plastering, etc. By constructing the excavation section according to the above, a parking lot 15 facility having a parking space 18 as illustrated in FIG. 4 can be constructed. In particular, in the present invention, since the prestressed concrete members 5 are connected to each other, it is important to perform a water leakage treatment by applying a sealing material or the like at a location where they contact each other. As shown in the figure, for example, a sealing material is injected from a seal hole to seal the material.
Perform the ring.

Although the invention made by the inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the invention. Needless to say, The present invention is applicable not only to parking lots but also to sewage drainage facilities and the like.

[0015]

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows. That is, according to the method of the present invention,
Perform a little rough moat, place a cutting jig with a prestressed concrete member on it, and dig with a drilling machine.
It can easily sink in the soil. That is, with the help of the excavating operation of the blade portion of the cutting jig and the ease of subsidence due to the weight of the prestressed concrete member, etc., it is possible to easily advance underground, and to submerge with a light force. it can. There is no need to apply pressure with a large-sized machine as in the past, and if the upper end of the column of the cutting jig is hit from above, it can be settled with a light force. Therefore, the construction can be performed with less noise and vibration, which contributes to shortening the construction period. In addition, the use of prestressed concrete members makes it possible to arrange reinforcing bars, formwork, and concrete.
It does not require so-called in-situ casting concrete pouring work, and it requires hundreds of sheets as in the past.
There is no need for pile driving. Therefore, no pollution due to noise or vibration is caused, the construction period is significantly reduced, and there is no need to work in the excavated space. No scaffolding is required. Further, the prestressed concrete member is
The positioning portion of the cutting jig is arranged in an appropriate position, and can be installed without any deviation, and the workability is extremely good. Furthermore, the cutting jig can be removed from the prestressed concrete member at an appropriate depth and installed at an appropriate position, and can be easily pulled out of the soil after the installation. The cutting jig can be disassembled and reassembled as needed, which is convenient for transportation and the like. ADVANTAGE OF THE INVENTION According to this invention, the labor required for the operation | work, such as the so-called on-site concrete-casting construction, the removal of a formwork, such as a sheet pile driving in, pulling out, reinforcing arrangement, a formwork, and pouring of a concrete material, is carried out. Not required, not only the construction period is significantly shortened, but also the cost can be reduced. Conventional precast molded concrete body (including reinforced concrete construction)
In the method of construction and the prefabricated method, there is a problem in that the concrete body is properly positioned and installed.
In addition, there is a problem in the workability and shortening of work such as press-down and sinking after the block is preliminarily assembled into a wall, but the present invention can also solve these problems.

[Brief description of the drawings]

FIGS. 1 (A) and 1 (B) are side explanatory views of a method showing an embodiment of the present invention, respectively.

FIG. 2 is an explanatory plan view of a method showing an embodiment of the present invention.

FIG. 3 is a configuration diagram of a parking lot showing an embodiment of the present invention.

FIG. 4 is an explanatory side view of a parking lot showing an embodiment of the present invention.

FIG. 5 is an explanatory view of a conventional example method;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sheet pile (sheet pile) 2 ... Stand up 3 ... Arrangement 4 ... Form 5 DESCRIPTION OF SYMBOLS 11 ... Bolt 12 ... Fixing member 13 ... Bolt 14 ... Positioning part 15 ... Parking lot 16 ... Cut beam mounting member 17 ... Cut beam 18 ... Seal hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 29/00 E02D 29/045-29/055 E02D 17/08

Claims (2)

(57) [Claims] 1. A prestressed concrete member having a blade portion and a positioning portion, wherein the prestressed concrete member can be installed in the ground and removed from the ground after the installation. A prestressed concrete member is attached to a device capable of performing excavation, and the device is advanced underground with the help of the excavation operation of the blade portion in a state where the prestressed concrete member is attached. The prestressed concrete member is removed from the device at a depth and the prestressed concrete member is positioned by the positioning portion of the device.
A method of constructing a building structure having an underground space, comprising: mounting a plurality of members at a predetermined position in the ground, and lifting the device upward to remove the device from the ground. 2. The construction method of a building structure according to claim 1, wherein the building structure having an underground space is a parking facility having an underground space capable of parking a vehicle.