JPH0665924A - Structural stud erection method in inverted construction method - Google Patents

Abstract

PURPOSE:To enhance plumbing accuracy, construction efficiency and safety by installing a guide casing with high accuracy before structural stub members are erected and setting up studs along their inside. CONSTITUTION:A rack 17 is set so that a main girder 18 may be oriented in the direction of north and south. After it is fixed with a casing 1, a guide casing 14 is aligned on the rack 17 and some allowance is determined based on the dimension and adjusted to conform to the allowance. Then, the guide casing 14 is lowered quietly and then the center of the guide casing 14 and a structural stud 2 is measured for their alignment and the main girder 18 and a sub-girder 19 are fixed based on their alignment. Then, a journal jack 21 is set on the main girder 18 so that a stopper 20 of the guide casing 14 may be supported. After the alignment of a post 2 with the guide casing 14 is determined, concrete is cast. Then, a float is set to a water pipe 22 so as to check the perpendicularity of the post. The post 2 into which a spacer 27 is closely fitted is dropped to the guide casing 14 where the level adjustment is carried out with a plier connected thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction column construction method for a reverse construction method.

[0002]

2. Description of the Related Art The reverse pouring method is a method of constructing an underground skeleton from the 1F floor while using concrete as a foundation after excavation and using a slab as a damming support. For this reason, in the reverse driving method, it is necessary to have a true column to support the skeleton load before the start of excavation. In recent years, the structure pillar itself has been increasing along with the increase of underground use of buildings. Since the structure columns have a great influence on the bearing capacity, the relationship with the beams, the concrete work for the underground structure, the reinforcing bar work, and the quality of the above-ground steel frame, it is important to ensure the accuracy, and then the construction efficiency and safety. Sex is important. Various construction methods have been developed and they are classified as follows.

A so-called upper and lower spacer guide system is used, as shown in FIG.
As shown in 0, the method of measuring the benoto excavation accuracy (upper part, lower part) and setting the upper and lower spacers of the true post based on the measurement results, 1 in the figure is a casing, 2 is the true post, 3a , 3b are upper spacers, lower spacers, and 4 are concrete base columns attached to the true column 2. Hereinafter, the same components are denoted by the same reference numerals and other methods are listed based on the drawings.

FIG. 21 shows a method of constructing a turret with a guide of 3 to 5 m from the work floor by an upper turret guide system, and using this as a ruler to construct a true column. In the figure, 5 is a work floor, and 6 is a stake built on the work floor 5 with a guide 6a.
Yatco is added to the head of the pillar 2 so that the top of the pillar 2 reaches a predetermined level.

The one shown in FIG. 22 is a yatco attachment system, in which a yatco 7 with a swinging 8-10 m and a lower position adjusting jack 9 is attached to the true column head, and the upper part of this is attached to the work floor 5. In this method, the jack 9 is clamped by the upper centering device 10 installed above and lowered while the posture is corrected by the jack 9, and the yatco 7 is removed after the completion of the construction.

FIG. 23 shows an upper centering system in which only the head of the true column 2 is installed on the work floor 5.
It is a method of centering with a and building the lower part by utilizing the hanging effect of the pillar 2 itself. Yatco is added to the head of the pillar 2 so that the top of the pillar 2 reaches a predetermined level.

FIG. 24 shows a vertical centering system,
The upper part of the pillar 2 is centered by an upper centering device 10 installed on the work floor 5, and the lower part of the pillar 2 is a jack 9 which is removably attached by a string 11 and a retrievable vertical transit 12 installed on the pillar 2. It is a method of building while checking the vertical accuracy due to the illuminated target 13. As shown in the drawing, the YATSUKO 7 is added to the head of the pillar 2 so that the top of the pillar 2 reaches a predetermined level.

[0008]

In the above-mentioned prior art, it is the actual situation that none of the above-mentioned precision, efficiency and safety are excellent.

That is, in the upper and lower spacer guide system, the accuracy of the casing 1 and the spacers 3a, 3a, which is indispensable for the installation, is required even if the measurement of the benoto excavation accuracy is complete.
The gap with b remains as an inclination, so it is not so high. Regarding efficiency, it takes time to measure the accuracy of Benoto excavation and the spacers 3a and 3b to be attached based on this, and it is low and safe. Regarding sex,
It is expensive because it requires work near one casing.

In the upper turret guide system, the accuracy is not so high as the gap between the guide 6a and the column 2 remains as an inclination, and the efficiency is not so high. It can be said that the safety is extremely low because there is work at a high place above the turret 6.

With the Yatco mounting method, the accuracy is
The true post 2 suspended from the yatco 7 is supposed to be held in the same vertical posture as the yatco 7, but in reality, the lower end of the true post 2 is embedded in the concrete undercarriage part 4. In this state, the post is bent by the posture correcting jack 9 in order to apply a horizontal force to the upper part of the post, but the post is extremely high. Regarding efficiency, it takes time to finely adjust the yatco 7 up and down, which is low, and As for safety, it is necessary for a person to enter the joint between Yatco 7 and pillar 2,
It is a danger.

In the upper centering system, the accuracy depends entirely on only the hanging accuracy, no correction is possible, and it is allowed only under extremely limited conditions.
It is extremely low. For efficiency, only the head of the column 2 needs to be adjusted by the centering device 10a installed on the work floor 5, so it is relatively quick, high, and for safety, one casing is used. It's expensive because it's near the top.

In the vertical centering method, the accuracy is the pillar 2
Since the lower part is movable, and horizontal force is applied nearby, there is no strain on the pillar 2 and it is extremely high. For efficiency, it takes some time to finely adjust the top and bottom of the pillar 2 and it becomes high,
And the safety is high because the work is done near one casing.

As described above, none of the methods has advantages and disadvantages and is excellent in all respects. The present invention has been made in view of such problems of the conventional technology, and the purpose thereof is to:
The purpose is to provide a new method of constructing a concrete pillar that is excellent in accuracy, efficiency and safety.

[0015]

In order to achieve the above object, the construction method according to the present invention comprises an upper centering device installed at a portion corresponding to an upper portion of a casing previously built in the ground. The verticality measuring device is hung on the side surface having the same sectional shape as the true pillar, and the guide casing having the lower centering device made of an underwater jack attached to the lower part is suspended, and the guide casing is attached to the casing with the upper centering device and the lower part. The centering device is operated to set it in a direction perpendicular to a predetermined direction, and then the true column having a tight fitting spacer attached to the peripheral surface is dropped into the guide casing in this state.

[0016]

The functioning column, which is guided and dropped in a tightly fitted state by a spacer interposed in a guide casing that is set with high precision, guarantees high installation accuracy. At the same time, it is necessary to adjust the position of the structure column itself and it is a drop, so it is highly efficient, and since the guide body is immersed in the ground without standing up on the ground, there is no work at height. High safety. Thus, a new method is provided that is excellent in terms of accuracy, efficiency, and safety.

[0017]

EXAMPLES Examples will be described with reference to the drawings. 1 and 2, the guide casing 1 used by the method of the present invention is shown.
4 and the upper centering device 15 are shown. Upper centering device 1
5, a main girder 18 is mounted on a mount 17 supported by the giraffe jack 16, a sub-girder 19 is mounted on the main girder 18, and a stopper 20 receiving a projection is provided on the head of the guide casing 14. A stop journal jack 21 is set. The guide casing 14 has the same sectional shape as that of the true column 2, a water pipe 22 is attached to the side surface thereof, and underwater jacks 23, ... Are installed toward the lower four circumferences. Reference numeral 24 in the drawing denotes a jack base for installing the journal jack 25 for supporting the yatco 7 installed on the guide casing 14, 26 is a jack receiver installed on the yatco 7, 27, ... It is a spacer for tight fitting attached to the.

3 to 19 show the construction procedure of the method of the present invention. That is, the true column 2 from the X and Y directions of the casing 1.
Position measurement is performed. (FIG. 3) Considering the positions of the main girder 18 and the water pipe 22,
Set so that the main girder 18 faces north-south. The pedestal 17 is fixed to the casing 1 with a lever block 28. (Fig. 4) The main girder 18 is set north-south, and the sub-girder 19 is set east-west, but the core of the guide casing 14 is put out on the pedestal 17, and a relief 29 is put out according to its size to match it. (FIG. 5) Gently lower the guide casing 14. (FIG. 6) The center measurement of the guide casing 14 and the true column 2 is performed, and the main girder 18 is fixed accordingly. (FIG. 7) The sub-girder 19 is fixed by aligning the guide casing 14 and the two cores of the column with the sumi which is projected on the main girder 18 by measurement. (FIG. 8) The journal jack 21 is set on the main girder 18, and the stopper 20 of the guide casing 14 is received. (Fig. 9) Take out the core of the column 20 to the set guide casing 14,
After confirming that it fits with the guide casing 14, if 100 mm or more has settled at the bottom of the hole immediately before placing concrete,
A slime process is performed by the slime pump 30. (Fig. 1
0) Concrete is placed through the tremie pipe 31. (FIG. 11) The water pipe 22 set in advance in the guide casing 14 is set with a duki and vertical confirmation is performed. (FIG. 12) The type of the pillar 2 is confirmed, and the spacer 27 is processed. (Fig. 13) Gently assemble the pre-assembled uncurved pillar 2 with a crane and receive it with H steel that stops at a predetermined height.
Connect Yatco7. (Fig. 14) Next, the pillar 2 is built. (FIG. 15) The height of the column 2 that has been previously put out on the cotco 7 is confirmed at the level 32, and the adjustment is performed by the journal jack 25. (Fig. 1
6) After checking the height at level 32, deposit the Yatco 7 in the journal jack 25. (FIG. 17) After the curing, the guide casing 14 is disassembled and pulled up, and the gantry 17 is moved while paying attention to the contact with the yatco 7,
The core of the pillar 2 is checked and adjusted, and the yatco 7 is fixed on the casing 1 with the H steel 33 mounted on the casing 1 to prevent the shake. (Fig. 1
8) After draining water to a predetermined level and backfilling, the ladder 34 is used to remove the connecting bolt 35 between the Yatco 7 and the pillar 2, and the Yatco 7 is separated and pulled up.
(Fig. 19) After removing the Yatco 7, check the two cores of the pillar, then backfill it, and cure it with an iron plate.

[0019]

Since the present invention is constructed as described above, it has the following effects. By installing the guide casing accurately before the construction of the true pillar, it is possible to build it accurately by simply dropping the true pillar along the inside of the guide casing. It Also, it is not necessary to add a retarder to the concrete. By using a water pipe, inclinometer, etc. for the guide casing,
Accuracy management becomes easy. By using square and circular guide casings, it is possible to support all types of true columns and work in a unified procedure, so no professional staff is required. Since the jig is low and there is no work in high places, it can be installed safely.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a main part of a method of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an explanatory view of the true column centering surveying on the casing in the method of the present invention.

FIG. 4 is a plan view showing an installation procedure of a gantry and a main girder in the method of the present invention, and b is a front view thereof.

FIG. 5 is an explanatory diagram of centering of the guide casing in the method of the present invention.

FIG. 6 is an explanatory view of a guide casing installation procedure in the method of the present invention.

FIG. 7 is an explanatory diagram of a guide casing installation procedure.

FIG. 8 is an explanatory diagram of a guide casing installation procedure.

FIG. 9 is an explanatory view of the guide casing receiving in the method of the present invention.

FIG. 10 is an explanatory view of a hole bottom slime treatment in the method of the present invention.

FIG. 11 is an explanatory view of placing concrete on a hole bottom in the method of the present invention.

FIG. 12 is an explanatory view of the vertical confirmation procedure of the guide casing in the method of the present invention.

FIG. 13 is an explanatory view of a procedure for attaching a spacer to a true column in the method of the present invention.

FIG. 14 is an explanatory view of the construction of a true pillar and a Yatco connection in the method of the present invention.

FIG. 15 is an explanatory diagram of how to insert a true-column into a concrete base column in the method of the present invention.

FIG. 16 is an explanatory diagram of the level adjustment procedure of the yatco in the method of the present invention.

FIG. 17 is an explanatory view of a procedure for giving a Yatco in the method of the present invention.

FIG. 18 a is a guide casing in the method of the present invention,
FIG. 3 is a plan view showing a Yatco fixing procedure after removing the gantry, and b is a front view.

FIG. 19 is an explanatory view of the procedure for releasing the connection between the yatco and the true column in the method of the present invention.

FIG. 20 is an explanatory diagram of a conventional upper and lower spacer guide system.

FIG. 21 is an explanatory diagram of a conventional upper turret guide system.

FIG. 22 is an explanatory diagram of a conventional Yatco attachment method.

FIG. 23 is an explanatory diagram of a conventional upper centering method.

FIG. 24 is an explanatory diagram of a conventional vertical centering method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Structural true column 3 Pillar 4 Concrete base column part 5 Working floor 6 Turret 6a Guide 7 Yatco 8 Dropping swing 9 Lower position correction jack 10 Upper centering device 10a Centering device 11 String 12 Vertical target 13 Illuminated target 14 Guide casing 15 Upper centering device 16 Kirin jack 17 Stand 18 Main girder 19 Secondary girder 20 Stopper 21 Journal jack 22 Water pipe 23 Underwater jack 24 Jack base 25 Journal jack 26 Jack receiving 27 Spacer for tight fitting 28 Lever block 29 Relief 30 Slime pump 31 tremie pipe 32 level 33 H steel 34 ladder 35 connection bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kimihiro Kato 1-2-3 Minami Hakata Station, Hakata-ku, Fukuoka Toyo Techno Co., Ltd. Kyushu Branch

Claims (1)

[Claims] 1. An upper centering device installed in a portion corresponding to an upper part of a casing previously built in the ground, and a verticality measuring device on a side surface having the same sectional shape as that of a true column, and a submersible jack on the lower part. The guide casing to which the lower centering device is attached is suspended, and the guide casing is set vertically to a predetermined direction by operating the upper centering device and the lower centering device with respect to the casing, and then, such a state. The method of constructing a true-post pillar in the reverse-placing method, characterized in that the true-post pillar with a tight-fitting spacer attached to the peripheral surface is dropped into the guide casing.