JPH055312A - Setting of structural center column - Google Patents

Abstract

PURPOSE:To set a structural center column to be provided on a pile constructed at job-site with high accuracy in a short time prior to the excavation of underground stair. CONSTITUTION:A setting base 10 having a guide 11 on its center is set on the ground's surface above a pile 50 constructed at the job site, and the horizon of the base 10 is adjusted by a level-regulating jack 20. Even for the guide 11, two directions crossing within the horizon and distortion are finely adjusted. A setting tool 30 is connected to the upside of a structural center column 1 by high-strength bolts, and the hanger tool on the upper end of the tool 30 is hung down through roller shackles to hang it up by the gravity center of the column 1. It is inserted into the guide 11 of the base 10 from the lower end of the column 1, and the guide rail 33 is vertically guided by the guide 11 of the base 10 and set in the concrete above the pile 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of erection of a construction pillar to be erected on a site construction pile before excavation of a basement floor of a building when the underground construction of the building is carried out by a so-called reverse driving method. is there.

[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]

The method of constructing a true column according to the present invention has the following steps. It should be noted that some of these steps may be performed in parallel or the work procedure may be changed.

(A) A step of installing a true-column mounting frame having guide portions for guiding the true-column in the vertical direction on the true-column mounting position. (b) A step of adjusting the position of the guide portion of the structure pillar mounting frame. (c) A step of attaching a true-column mounting jig for lifting the true-column to the center of gravity to the upper end of the true-column. (d) A step of vertically hoisting the true column by means of a lifting device via the true column erection jig, and inserting it from the lower end to the guide portion of the true column erection stand. (e) Vertically guide the above-mentioned structure pillar mounting jig along the guide portion of the above-mentioned structure pillar mounting base, and erect the lower end of the structure pillar to a predetermined depth in the uncured concrete of the site construction pile Process.

In order to ensure accuracy, it is desirable that the structure-supporting gantry pedestal guide part be capable of fine adjustment in the horizontal plane.

Further, a guide rail portion that forms a vertical surface is provided along the jig main body in the true-column mounting jig, and while contacting with a guide roller provided in the guide portion of the true-column mounting base. If it is installed, high-accuracy installation can be performed smoothly.

In order to make further fine adjustment in a state where the true pillar is built up to a predetermined depth, a plurality of receiving brackets are provided on the upper side surface of the building jig main body, and a vertical bracket installed on the true pillar mounting frame is installed. It is possible to use a method in which the directional jacks are supported and these are adjusted.

[0016]

EXAMPLES Next, the illustrated examples will be described.

FIG. 1 shows an outline of the present invention, showing a state in which a construction post 1 and a construction jig 30 are used to vertically erection a true construction column 1 on top of a field construction pile 50. ing.

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 an embodiment of the mounting stand 10 for the true-column structure. An example of the work procedure from the setting of the mounting stand 10 for the true-column structure to the installation of the true-column structure 1. The following is an example.

(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 swinging it down, etc.
Read the value on the gauge.

(4) The same numerical value as 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 (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 opposed 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 300m 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) The guide roller 12 is raised in order to prevent the false column 1 from hitting the guide roller 12 of the guide portion 11 and shifting when it is installed.

(10) Build the true pillar 1.

(11) The guide roller 12 is returned to the original position when the installation jig 30 on the upper part of the true column 1 reaches the position of the installation 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 erection jig 30 is roughly divided into three parts, that is, a hanging jig part, an erection jig body, and a guide rail part.

The hanging jig portion is provided above the main body of the erection jig 30, and in order to eliminate the inclination of the true column 1, the center of gravity is calculated 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 false 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 in order to correctly set the true column 1 in the center portion of the installation frame installed correctly, and this 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 frame immediately 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 FIGS. 13 to 16 is a true pillar 1
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.

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 a state in which the true post 1 is built, and is carried out by the following procedure, 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 a state in which the gantry 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 a state of removing the casing 51. After removing the head fixing hardware and the like, 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 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 and the like are backfilled to the GL level.

As described above, the structure-mounted post 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 columns are manufactured and jointed with high precision, and by using the structure column erection jig to hang them at the center of gravity, they automatically become vertical, and they are vertically guided by the guides of the pedestal mount to build on-site. It can be accurately built in the uncured concrete of the pile.

[0057]

[Effects of the Invention] The structure columns cannot be inserted unless the construction is completed within a short time after the concrete is cast on the site-constructed piles. However, by using the construction method of the present invention, the concrete cannot be inserted. , It is possible to build a true column with high accuracy within the time when the concrete has sufficient fluidity.

[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 Akomi 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 the building after concrete placement of the site-constructed pile, the true pillars mainly constituting the pillars of the basement of the building are installed on the site-constructed pile. In the method of erection of the vertical columns to be erected vertically in (a), (a) installing the gantry column pedestal having the guide portion for vertically guiding the gantry columns on the gantry column erected position. Step (b) adjusting the position of the guide portion of the above-mentioned structure column built-in gantry, (c)
A step of attaching a trueness column building jig for lifting the trueness column at the center of gravity, to the upper end of the trueness column, (d) a lifting device for the trueness column through the trueness column building jig Vertically, and inserting from the lower end to the guide section of the true-column mounting base, and (e) the true-column mounting jig to the guide section of the true-column mounting frame. A method of erection of a true-post pillar, comprising a step of vertically guiding along the bottom of the true-post pillar to a predetermined depth in the uncured concrete of the on-site built pile. 2. A structure in which a true pillar, which mainly constitutes a pillar of a basement of a building, is vertically installed on the basement of the building after excavating the basement of the building after the concrete has been laid on the site. In the method of erection of true pillar, (a) a step of installing a true stanchion built-in gantry having a guide portion for guiding the true true pillar in a vertical direction on a true true pillar built-in position, (b) A step of adjusting the position of the guide portion of the above-mentioned structure-based pillar mounting frame, (c)
A step of attaching a trueness column building jig for lifting the trueness column at the center of gravity, to the upper end of the trueness column, (d) a lifting device for the trueness column through the trueness column building jig Vertically, and the step of inserting from the lower end to the guide portion of the true-column mounting frame, (e) along the guide portion of the true-column mounting frame of the true-column mounting jig. Guide vertically and erect the lower end of the structure pillar to a predetermined depth in the uncured concrete of the on-site built pile, and install a plurality of receiving brackets provided on the upper side surface of the building jig main body, respectively. Supporting the vertical jack installed on the building base, and (f) adjusting the height of the vertical jack supporting the receiving bracket to adjust the height of the vertical pillar mounting jig and the vertical shaft. A method of constructing a true pillar, comprising the step of adjusting the verticality of the pillar. 3. A guide rail portion, which forms a vertical plane on the outer peripheral portion of the installation jig main body, is formed on the installation post main jig along the installation main body of the installation true pillar. A guide roller is provided in the guide portion of the true-column mounting jig, which comes into contact with the guide rail portion of the true-column mounting jig when vertically guiding the true-column mounting jig. 3. The method of erection of a true pillar according to claim 1 or 2. 4. The true pillar construction according to claim 1, 2 or 3, wherein the guide portion is movable in two directions orthogonal to each other in the horizontal plane and rotatable in the horizontal plane with respect to the true pillar built-in gantry. Included method.