JPH055391A - Structural stud erection holder - Google Patents

Abstract

PURPOSE:To erect a structural stud provided on a site construction shaft with high degree of accuracy within a short period of time prior to the excavation of part of basement floors. CONSTITUTION:An erection pedestal 10 having a guide section 11 in the central part thereof is installed on the ground on a side construction shaft 50. The level of the erection pedestal 10 is adjusted by a level adjusting jack 20. In addition, for the guide section 11, two directions at right angles in a horizontal plane, twist, etc., are finely adjusted. An erection jig 30 is connected to the upper part of a structural strut 1 with a high strength bolt, etc., a hanging jig on the upper and of the erection jig is suspended through a roller shackle, etc., and it is suspended on the center of gravity of the structural strut 1. The lower end of the structural strut 1 is inserted into the guide section 11 of the erection pedestal 10, a guide rail section 33 is vertically guided by the guide section 11 of the erection pedestal 10 and is erected into the concrete of the upper part of the site construction shaft 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a construction pillar construction used when constructing a construction pillar on a site construction pile prior to excavation of the basement floor of the building when the underground construction of the building is carried out by the so-called reverse construction method. It is related to the stand.

[0002]

2. Description of the Related Art In the so-called reverse driving method, usually, after placing the floor and beam concrete on the first floor above ground, excavating underground,
The floor and beam concrete on the 1st basement floor were placed, and the basement 2
Underground excavation and floor / beam construction will be performed in the order of the first floor and the third basement. Therefore, a steel frame column called a structural column will be installed to receive the floor and beam loads on the upper floor during excavation.

In this case, the installation accuracy of the true column is very important. In other words, the true pillar is the load on the upper floor (1st floor, 1 underground)
Floors, 2nd basement floors, etc., and when steel structures above ground are started, the weight of steel frames, floor concrete, etc.) will be received.
If it is inclined as shown in FIG. 25, an unexpected bending moment is applied, which is dangerous. Also, as shown in FIG. 26, when the true-columns that make up the steel-reinforced concrete columns are inclined, they do not fit inside the column mold or the rebars of the columns do not fit, and the true-columns are reinforced as shown in FIG. 26 (c). Hit
As shown in FIG. 26 (d), it comes out of the pillar shape.

As a conventional method of erection of the true structure pillar, in order to secure the position of the top portion of the true structure pillar, H-section steel is assembled on the pile excavation base used for construction of the on-site built pile in the cross girder, and the core ink is made with the transit. It is common to set the true pillar based on the ink.

Further, with respect to the inclination of the true column, a reaction force is applied to the casing during pile excavation, and a jack is provided as low as possible to push the true column laterally to move it.

[0006]

However, in the above-mentioned erection method, there is a clearance when the structural column is inserted into the H-shaped steel well girder, and the structural column can be made into the H-shaped steel at the time of insertion. There is an error in.

Further, the work of setting the H-shaped steel of the cross girder at right angles or parallel to the X and Y directions, which is the reference, is complicated, and this causes twisting of the true column.

Furthermore, since the pile excavation base is used as it is for the construction of the construction pillar, the pile excavation base cannot be removed until the concrete is hardened after the construction of the construction pillar is completed. , Conversion efficiency is poor.

Regarding the correction of the inclination, it is difficult to completely correct the inclination when the casing length is short. Moreover, it is difficult to confirm the inclination of the true column in the muddy water for stabilizing the hole wall used for pile excavation.

The present invention is intended to solve the above-mentioned problems in the prior art.

[0011]

[Means for Solving the Problems] The structure true pillar built-in gantry of the present invention is a structure that mainly forms the pillars of the basement floor portion of the building after excavating the basement floor portion of the building after the concrete construction of the on-site built pile. Used to erect true pillars vertically on site built stakes.

The built-in mount of the present invention is a mount main body installed on the ground surface at the position where the structure is installed, a level adjusting means for adjusting the level of the mount main body, and the structure formed at the center of the mount. And a guide portion for guiding the true pillar in the vertical direction.

The level adjusting means comprises, for example, a plurality of jacks for supporting the built-in gantry body, and adjusts the height of the jacks to bring them out horizontally.

Further, the position of the guide portion can be adjusted in the horizontal plane on the gantry body whose horizontal is also adjusted. For example, by a plurality of horizontally arranged hydraulic jacks, movement in the reference X and Y2 directions and in the horizontal plane. Allows rotation.

[0015]

EXAMPLES Next, the illustrated examples will be described.

FIG. 1 shows the construction of a true-structured pillar using the built-in stand of the present invention. The built-up stand 10 and the built-in jig 30 are used to build the true-finish pillar 1 on site. It is shown that the pile 50 is built vertically.

The built-in pedestal 10 is installed on the ground surface at the position where the structured pillars are built, and a guide portion 11 for guiding the structured pillars 1 in the vertical direction is formed in the central portion. The built-in pedestal 10 is horizontally adjusted by a level adjustment jack (hydraulic jack) 20 and the like, and as will be described later, the guide portion 11 is also made to be capable of fine adjustment of rotation in two directions orthogonal to each other in a horizontal plane and twist. There is.

As for the installation jig 30, the jig main body is connected to the upper part of the false column 1 by a high-strength bolt or the like, and the hanging jig portion at the upper end of the installation jig 30 is lifted by a lifting machine via a roller shackle or the like. As a result, the true column 1 can be hoisted at the center of gravity. At the time of erection of the true construction pillar 1, the true construction pillar 1 is lifted up through the construction jig 30 and inserted into the guide portion 11 of the construction stand 10 from the lower end of the true construction pillar 1. For example, when the cross section of the true pillar 1 is rectangular, the built-in jig main body having a cross section having the same or similar outer diameter as the true true pillar 1 is used, and the outer peripheral surface of the jig main body is used as the guide rail portion. The guide portion 11 of the built-in frame 10 guides vertically. If the cross section of the true pillar 1 is other than rectangular, for example, a circular cross section, an H-shaped cross section, a cross section, or otherwise, the cross section of the true pillar 1 is determined according to the center of gravity of the true pillar 1, and the four corners are determined. By providing the guide rail portion with a square pipe or an angle, the outer peripheral portion has a substantially rectangular cross section, and the guide portion 11 of the erection stand 10 is provided.
To match.

FIGS. 2 to 4 show a structural pillar built-in base 10 of the present invention.
An example of the work procedure from the setting of the true-post pillar 10 to the installation of the true-post pillar 1 is as follows.

(1) The built-in frame 10 is set in accordance with the black ink provided on the asphalt concrete on the ground surface.

(2) The built-in frame 10 is set horizontally by the four level adjustment jacks 20.

(3) Raise the core ink provided on the asphalt concrete on the surface of the ground to the lower gauge 18 by lowering it.
Read the value on the gauge.

(4) The same numerical value as that of the lower gauge 18 is transferred to the upper gauge 19 (the upper gauge and the lower gauge have the same gauge value if the built-in stand is vertical).

(5) A centering ruler is set on the guide part 11 in the center of the built-in frame 10 (it is a substantially rectangular ruler that matches the shape and size of the guide part, and is fitted into the guide part to be used for adjustment in the horizontal plane. To).

(6) A water thread is stretched between the opposing upper gauges 19 (this water thread is parallel to the passing core and indicates the core of the true column).

(7) The built-in frame is 300 m in each of the X and Y directions.
Within the range of m and twist of 8 °, fine adjustment is possible with a plurality of hydraulic jacks 13 arranged in the horizontal plane. The hydraulic jack 13 adjusts the X and Y directions and the twist in accordance with the water thread described above, and adjusts the centering ruler. This completes the centering work.

(8) Remove the centering ruler.

(9) In order to prevent the true column 1 from hitting the guide roller 12 of the guide portion 11 and shifting during installation, the guide roller 12 is raised.

(10) Build the true pillar 1.

(11) The guide roller 12 is returned to the original position when the erection jig 30 on the upper part of the true column 1 reaches the erection stand 10.

(12) While inserting the construction jig 30 above the structure column 1 with the guide roller 12, the structure column 1 is inserted.

(13) Bracket 3 provided on the installation jig 30
8 is set on the jig receiving jack 25 provided on the building base 10 and finely adjusted by the jig receiving jack 25 to a regular level.

By the above operation, the true post 1 can be set correctly and easily in both position and level.

FIGS. 5 to 15 show an embodiment of the true-column mounting jig 30.

The embodiment shown in FIGS. 5 to 8 is a case where the true column 1 is a cross-section column having a flange portion at each tip.

The true-column mounting jig 30 is roughly divided into three parts, namely, a hanging jig portion, a building jig body, and a guide rail portion.

The hanging jig portion is provided above the main body of the building jig 30, and in order to eliminate the inclination of the true column 1, the center of gravity is obtained by calculation, and the hanging hole 31 is provided so that the center of gravity is the hanging center.
Further, in order to ensure the verticality in the state where the true column 1 is hung, for example, as shown in FIG.
Should be used. By using the roller shackle 40, as shown in FIG.
Since the center of gravity is the center of suspension even when the
The roller shackle 40 is rotated to be vertical as shown in FIG.

With respect to the main body of the installation jig, conventionally, the installation jig of the type to be attached to the upper part of the true column is temporary,
Although it was easy to consider the accuracy and the joint with the true-structured pillar, in order to maintain the verticality by the self-weight of the true-structured pillar 1, the erection jig 30 needs to have the same accuracy as the true-structured pillar 1. Not only the above, but also the joint (joint) with the structural column 1 must be able to be completely integrated. For this reason, in the present embodiment, four erection pieces 36 are provided at the joint with the true column and are joined by a plurality of high-strength bolts 37. Further, on the upper side surface of the installation jig main body, the installation column 10 is vertically supported via the jig receiving jack 25 in a state of being installed up to a predetermined depth (see FIG. 2). A plurality of brackets 38 are provided for this purpose.

The guide rail portion 33 is provided to correctly set the true post 1 at the center of the installation frame installed correctly, and the guide rail portion 33 is used to guide the guide roller 12 (see FIG. 3) and insert the true column 1. In addition, the guide roller part is upside down, and when it is inserted from the tip of the structure column, it stands upright, avoiding interference with the structure column 1 and tilting it up to a predetermined depth, The guide rail portion 33 of the inserting jig 30 is brought into contact with the guide rail portion 33.

By unifying the outer surface dimensions of the guide rail portions 33 facing each other into several types, it is possible to organize a large number of true column sizes and prepare several types of guide portions or guide rail portions for the mounting base. Become.

The length of the guide rail portion 33 is determined so that it is constrained by the guide roller of the building base just before the tip of the true column 1 reaches the top of the pile concrete (the tip moves due to the resistance of the pile concrete). However, to prevent the true pillar from tilting). Further, the guide rail portion 33 is removed after the pile concrete has hardened, but when the length is determined as described above, the tip of the guide rail portion 33 becomes about 2 m from the ground surface. Therefore, it can be easily removed by working on the ground surface,
In addition, as a method for ensuring the accuracy, for example, the accommodation as shown in FIG. 22 can be considered. That is, a pin 34 is provided at the tip of the guide rail portion 33, a hole 6 for a pin is opened in the receiving plate 5 on the side of the false column 1, and the pin 34 is inserted and fixed in the hole 6.

The embodiment shown in FIGS. 9 to 12 is a case where the true column 1 is a steel pipe column having a circular cross section. In this embodiment, four square pipes are arranged as guide rail portions 33 on the outside of the installation jig body 30 made of a round steel pipe so that the guide rail portions 33 form a rectangle. The length of the guide rail portion 33 and the structure of the tip portion can be considered as in the case of the cross-section column described above.

The embodiment shown in FIG. 13 to FIG.
Is the case of a steel pipe column with a rectangular cross section. In this embodiment, a square steel pipe having the same outer diameter as the steel pipe column is used for the installation jig body 30,
The outer peripheral surface that is continuous with the outer peripheral surface of the rectangular steel pipe column is used as the guide rail portion 3.
It is used as 3 '. FIG. 16 shows a contact portion of the built-in stand with the guide roller 12 in that case.

The embodiment shown in FIG. 17 to FIG.
Is composed of an I-shaped steel 1a and a T-shaped steel 1b orthogonal to the I-shaped steel 1a, and a beam receiving portion 2 is attached to this. Similarly, the structural true column 30 has an I-shaped steel 30a and a T-shaped steel 3 orthogonal to the I-shaped steel 30a.
0b, but the flange width, plate thickness, etc. may be small. Also in this case, the center of gravity including the beam receiving portion 2 and the like is calculated and the center of gravity is suspended.

FIG. 23 is a flow chart of the whole process. Immediately after the completion of on-site construction pile work (excavation → primary slime treatment → hole wall measurement → reinforcement basket construction → secondary slime treatment → concrete placement) Set the built-in stand.

FIGS. 24 (a) to 24 (g) correspond to the steps after the on-site construction pile work of FIG.

FIG. 24 (a) shows a state in which the true column built-in gantry 10 is set. For example, the procedure is as follows. Check work ground → Check true column core (ink on asphalt concrete) → Stand core set (match at the four corners of the stand) → Level adjustment (adjust the height of each level adjustment jack using the level level attached to the stand) → Stand Adjustment of misalignment (using a pedestal ruler) → Confirmation of core position adjustment of the true column (position adjustment based on measurement results) → Level check of true column.

FIG. 24 (b) shows the construction of the true-columns 1. The procedure is as follows, for example. Check the true column core and direction → Check the true column level → Build the true column (suspend with two crawler cranes) → Lifting movement → Suspend at the core position (1 crawler crane) → Insert the true column stand (hang) Lowering → Inserting into the tip concrete) → Structural column setting, level adjustment, direction confirmation.

FIG. 24 (c) shows how the pedestal 10 is removed. The procedure is as follows, for example. Pile concrete curing → Temporary fixing of structural column head → Fixing position confirmation → Removing the cradle → Removing ruler → Confirming the structural column level and core position.

FIG. 24 (d) shows the state of primary backfilling, in which muddy water (stabilizing liquid) for pile excavation is collected and recycled crushed stone 5
Backfill to the prescribed height with 4 etc.

FIG. 24 (e) shows how the casing 51 is removed. After removing the head fixing hardware, etc., the casing 51 for pile construction is pulled out.

FIG. 24 (f) shows a state in which the true-column mounting jig 10 is removed. The true-column mounting jig 10 is removed from one true-column head, and then the true-column head is further removed. Check the position of.

FIG. 24 (g) shows a state of secondary backfilling, in which the crushed stones 55 etc. are backfilled to the GL level.

As described above, the structural pillar built-in base is horizontal, X,
The Y direction and the twist can be easily finely adjusted. On the other hand, there are various shapes of the true structure pillars, including those other than those shown in FIGS. , X, Y directions and twist.

The structure column is manufactured and jointed with high precision and is hung at the center of gravity by using the structure column construction jig, so that it automatically becomes vertical, and it is guided vertically by the guide part of the installation frame, and built on site. It can be accurately built in the uncured concrete of the pile.

[0056]

[Effects of the Invention] The structure pillar cannot be inserted unless the construction is completed in a short time after the concrete is cast on the site-constructed pile, but the concrete pillar cannot be inserted. , It is possible to build a true column with high precision within the time when the concrete has sufficient fluidity. That is,
By installing the built-in gantry of the present invention on the ground surface at the position where the gantry is installed, adjusting the horizontal and guide parts of the gantry body, and guiding the vertically hung manganese pillar by the guide part. The pillars can be erected accurately in a short time.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an outline of the present invention.

FIG. 2 is a front view showing an embodiment of a true pillar built-in gantry.

FIG. 3 is a plan view showing an embodiment of a true-column mounting frame.

FIG. 4 is a side view showing an embodiment of a true-column mounting frame.

FIG. 5 is a front view showing an embodiment of a true-column mounting jig.

6 is a cross-sectional view taken along the line AA of FIG.

7 is a sectional view taken along line BB of FIG.

FIG. 8 is a horizontal cross-sectional view showing an arrangement of joints of a true-column and a true-column-installing jig.

FIG. 9 is a front view showing another embodiment of the true-column mounting jig.

10 is a cross-sectional view taken along line CC of FIG.

11 is a cross-sectional view taken along the line DD of FIG.

12 is a sectional view taken along line EE of FIG.

FIG. 13 is a front view showing yet another embodiment of a true-column mounting jig.

FIG. 14 is a sectional view taken along line FF of FIG.

15 is a sectional view taken along line GG of FIG.

FIG. 16 is a horizontal cross-sectional view showing a contact portion between a true-column mounting jig and a guide roller portion of the true-column mounting base.

FIG. 17 is a front view showing still another embodiment of the true-column mounting jig (the upper end hanging jig portion is omitted).

18 is a sectional view taken along line HH of FIG.

FIG. 19 is a horizontal cross-sectional view showing an arrangement of joints of a true-column and a true-column-installing jig.

20A and 20B show a structure of an upper end lifting jig portion of a true-column mounting jig, wherein FIG. 20A is a front view and FIG. 20B is a side view.

21 (a) and 21 (b) are views for explaining the action of the roller shackle.

FIG. 22 is a perspective view showing the accommodation of the tip of the guide rail portion of the true-column mounting jig.

FIG. 23 is a flowchart of the entire process of building a true pillar.

24 (a) to (g) are vertical cross-sectional views showing the work of constructing the true post after the work of constructing piles on site.

FIG. 25 is a vertical cross-sectional view for explaining the necessity of vertically ensuring the true columns.

[Fig. 26] Fig. 26 is a diagram for explaining the necessity of vertically securing the true pillar, (a) is a vertical sectional view, (b) is a horizontal sectional view when the true pillar is correctly installed, (c) and (d) are horizontal cross-sectional views when the true column is inclined.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Structural pillar, 2 ... Beam receiving part, 5 ... Receiving plate, 6 ...
Holes, 10 ... Structured pillar installation frame, 11 ... Guide part, 12 ... Guide roller, 13 ... Hydraulic jack, 18 ... Lower gauge, 19 ... Upper gauge, 20 ... Level adjustment jack, 2
5 ... Jig receiving jack, 30 ... Construction pillar construction jig, 31 ...
Hanging hole, 33, 33 '... Guide rail part, 34 ... Pin, 3
6 ... Erection piece, 37 ... High-strength bolt, 38 ... Bracket, 40 ... Roller shackle, 50 ... On-site built pile, 51 ... Casing, 52 ... Pile top, 53 ... Pile surplus top, 54, 55 ... Crushed stone,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akemi Konishi 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch

Claims (1)

[Claims] [Claim 1] Prior to excavation of the basement of a building after concrete placement of the site-constructed pile, a true pillar that mainly constitutes a pillar of the basement of the building is formed on the site-constructed pile. A structure-supporting pedestal used for a method of installing a structure-supporting pillar that is vertically installed on the base. It comprises a horizontal adjusting means and a guide part for guiding the true column vertically formed in the center of the gantry, and the guide part is positionally adjustable with respect to the gantry body in a horizontal plane. This is a structural pillar built-in pedestal. 2. The true-column mounting frame according to claim 1, wherein the horizontal adjusting means includes a plurality of jacks that support the true-column mounting frame. 3. The false column built-in gantry according to claim 1, wherein the guide portion can be moved in two directions orthogonal to each other in a horizontal plane and rotated in the horizontal plane by a plurality of hydraulic jacks. 4. The true-column mounting frame according to claim 1, wherein the guide portion is provided with an up-down type guide roller.