JP2001090070A - Constructing method for column and facility for arranging steel frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the constructing method for a column, by which a steel frame used for the column can be adjusted directly. SOLUTION: A frame with a hole to be penetrated 20 into which the steel frame is penetrated, and four erection pieces 22 installed around the hole to be penetrated at intervals is mounted on a reference plane 10. The steel frame 18 with the erection pieces in the same number as the erection pieces is hung up, and introduced into a pit hole from the hole to be penetrated of the frame. The erection pieces of the steel frame and the erection pieces of the frame are aligned in the vertical direction, load bearing devices 30 capable of being leveled in the vertical direction are arranged among each erection piece of the frame and each erection piece of the steel frame and the steel frame is lowered, the steel frame is made perpendicular by the load bearing devices, measuring the inclination of the steel frame by an inclinometer 3 installed to the steel frame in the vicinity of the reference plane, and concrete is placed into the pit hole.

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 column and a facility for arranging steel frames used for the column in a predetermined manner.
In particular, the present invention relates to a construction method suitable for constructing a straight pillar, which is a pillar of a basement floor portion of a building, and a facility for vertically arranging a steel frame used for the pillar.

[0002]

2. Description of the Related Art A built-in stand mounted on the ground is provided with four level adjusting jacks, a plurality of jacks for adjusting a position of a guide portion in a horizontal direction, and a built-in jig which is attached to a straight pillar. There has been proposed a erected pillar mounting device (Japanese Patent No. 2556216).

When a erected pillar is to be erected by this apparatus, the erection stand is horizontally arranged by a level adjusting jack, and then the horizontal position of the guide portion is adjusted, and the erected pillar to which the erection jig is attached is mounted. Guide to the guide section and mount the bracket of the built-in jig on the jig receiving jack of the built-in stand. The jig receiving jack finely adjusts the level so that the guide portion is vertical, and thereby the vertical column is vertical.

[0004]

In the installation of a straight pillar by the above apparatus, the straight pillar is indirectly supported on a built-in pedestal via a guide portion. Therefore, the verticality of the straight pillar depends on the manufacturing accuracy of the guide portion. In addition, in the above-mentioned apparatus, devices for adjusting the level of the pillars and adjusting the position in the horizontal direction are provided on the built-in gantry, and the functions of the gantry are provided in the gantry. It has a shape.

[0005] The present invention provides a method for constructing a pillar and a facility for arranging the steel frame, which can directly adjust the steel frame used for the pillar.

[0006] The present invention also provides a steel frame placement facility that can be downsized as a whole.

[0007]

SUMMARY OF THE INVENTION The present invention is a method for constructing a pillar in a pile hole excavated downward from a reference plane. First, a pedestal having a through hole through which a steel frame is to penetrate, and at least three erection pieces attached at intervals around the through hole, such that the through hole is located above the pile hole. At the reference plane. Next, the erection piece has the same number of erection pieces as the at least three erection pieces, and the erection pieces lift up a steel frame attached so as to correspond to the erection pieces of the gantry and penetrate through the through-hole of the gantry, and Guide into the hole. After guiding the steel frame into the pile hole, the erection piece of the steel frame and the erection piece of the gantry are vertically aligned, and a load supporting device capable of adjusting the level in the up-down direction is provided for each erection piece of the gantry and the steel frame. Arrange between each erection piece and lower the steel frame. Then, the steel frame is made vertical by the load supporting device while measuring the inclination of the steel frame by at least one inclinometer attached to the steel frame in the vicinity of the reference plane, and concrete is poured into the pile hole.

When the steel frame is placed on the gantry via the load supporting device, the load of the steel frame is transmitted from the erection piece of the steel frame through the load supporting device, further through the erection piece of the gantry,
It is transmitted to the gantry and received here. In this state, the level is adjusted by operating at least three load supporting devices, and the steel frame is made vertical while measuring the inclination of the steel frame using an inclinometer.

Since the steel frame is directly adjusted by the load supporting device disposed between the erection piece of the steel frame and the erection piece, and is adjusted by at least three load supporting devices, it is highly accurate. It is vertical. As a result, a column with high vertical accuracy can be obtained.

Since the load supporting device is related to the erection piece of the gantry and the inclinometer is attached to the steel frame near the reference surface, the operator on the reference surface can operate the load supporting device. Yes, and the inclination of the steel frame can be measured with an inclinometer. Therefore, there is no need for measurement or adjustment involving danger of entering the pile hole, and safe work can be guaranteed.

Since the load of the steel frame is received by at least three load supporting devices and the gantry, it is not necessary to keep the steel frame suspended by the crane during the vertical adjustment of the steel frame and the subsequent concrete placement. Operating rate can be increased.

[0012] The present invention is also a method for constructing a pillar in a pile hole excavated downward from a reference plane. First, a pedestal having a through hole through which a steel frame is to penetrate, and at least four erection pieces attached around the through hole so that the through hole is located above the pile hole. At the reference plane. Then, the erection pieces have the same number as the at least four erection pieces, and these erection pieces lift a steel frame attached so as to correspond to the erection pieces of the gantry and penetrate through the through-holes of the gantry. Guide into the hole. After guiding the steel frame into the pile hole, the erection piece of the steel frame and the erection piece of the gantry are vertically aligned, and the level support in the up and down direction can be adjusted, and the load support device capable of adjusting the position in the horizontal direction can be used. The steel frame is lowered by placing it between each erection piece of the gantry and each erection piece of the steel frame. Then, the horizontal position of the steel frame is adjusted by the load supporting device. Then, the steel frame is made vertical by the load supporting device while measuring the inclination of the steel frame by at least one inclinometer attached to the steel frame in the vicinity of the reference plane, and concrete is poured into the pile hole.

When the steel frame is placed on the gantry via the load supporting device, the load of the steel frame passes through the load supporting device from the erection piece of the steel frame, further passes through the erection piece of the gantry,
It is transmitted to the gantry and received here. In this state, the horizontal position of the steel frame is adjusted by operating at least four load supporting devices, the level of the steel frame is adjusted, and the inclination of the steel frame is measured by an inclinometer, thereby making the steel frame vertical.

Since the steel frame is directly adjusted by the load supporting device arranged between the erection piece of the steel frame and the erection piece, and is adjusted by at least four load supporting devices, it is highly accurate. It is vertical. In addition, the horizontal position of the steel frame can be accurately determined. As a result, it is possible to obtain a column with a high vertical accuracy in which the position in the horizontal direction is accurately determined.

Since the load supporting device is related to the erection piece of the gantry and the inclinometer is attached to the steel frame in the vicinity of the reference surface, the operator on the reference surface can operate the load supporting device. Yes, and the inclination of the steel frame can be measured with an inclinometer. Therefore, there is no need for measurement or adjustment involving danger of entering the pile hole, and safe work can be guaranteed.

In order to receive the load of the steel frame by at least four load supporting devices and the gantry, when the horizontal position adjustment and the vertical adjustment of the steel frame are performed, the concrete
There is no need to keep the steel frame suspended by the crane, and the operating rate of the crane can be increased.

In another invention, the four erection pieces are attached to the gantry. These erection pieces are such that the extension lines of two erection pieces located adjacent to each other intersect at an angle of substantially 90 °, and the two erection pieces located at opposing parts are substantially coplanar. It is arranged to be located inside.

Since the four erection pieces have a so-called symmetrical arrangement, the erection pieces can be easily mounted. In addition, horizontal position adjustment and vertical adjustment of the steel frame can be easily performed.

In still another invention, the two inclinometers are attached to a substantially perpendicular side surface of the steel frame near the reference plane, and measure the inclination of the steel frame.

The inclinometer measures the inclination of the side on which the inclinometer is mounted from a vertical plane. By mounting two inclinometers on the substantially orthogonal side of the steel frame, the verticality of the steel frame can be completely and perfectly measured. And it can measure enough.

[0021] In still another aspect of the present invention, the step of vertically setting the steel frame by the load supporting device while placing the concrete in the pile hole is repeated while measuring the inclination of the steel frame by the inclinometer.

Although the verticality of the steel frame may be changed by casting concrete, according to the present invention, the steel frame is repeatedly placed vertically while measuring the inclination of the steel frame, and the concrete casting is repeated. Is surely maintained in a vertical state. As a result, a column with higher vertical accuracy can be obtained.

In still another invention, a casing is inserted into the pile hole prior to installing the gantry on the reference surface, and the gantry is fixed to the casing when the gantry is installed on the reference surface. .

Although a concrete slab or the like for supporting and firmly fixing the gantry must be prepared in advance on the reference surface, according to the present invention, since the gantry can be supported by the casing, no concrete slab or the like is required. Therefore, workability can be improved accordingly. On the other hand, the casing is buried underground with concrete and becomes part of the pillar.

The present invention also relates to a facility for use in placing a steel frame having at least three erection pieces attached to an outer peripheral surface at intervals in a pile hole excavated downward from a reference plane, comprising: And a load supporting device. The pedestal, a through-hole to penetrate the steel frame,
The at least three erection pieces and the same number of erection pieces are spaced around the through hole, and the erection pieces are attached to correspond to the steel erection pieces. The load support device is disposed between each erection piece of the gantry and each erection piece of the steel frame, and is capable of adjusting a level in a vertical direction.

When the steel frame is guided into the pile hole through the through hole of the gantry and the erection piece of the steel frame is placed on the load supporting device, the load of the steel frame is passed through the erection piece of the steel frame, the load supporting device, and the erection piece of the gantry. It is transmitted to the gantry and received here.

Where the equipment for arranging the steel frame comprises a gantry and at least three load supporting devices, the gantry only needs to be large enough to penetrate the steel frame and to be mounted on the periphery of the pile hole. Since the load supporting device is mounted on the erection piece, the entire equipment can be made as small as possible, and the size can be reduced. In addition, since the gantry only has the erection piece, it can have a simple structure.

The load supporting device supports the load of the steel frame, and since the level and the verticality of the steel frame can be adjusted by at least three load supporting devices, the steel frame can be maintained without being suspended by a crane or the like. , Load adjustment, level adjustment, and vertical adjustment.

In another aspect, the load supporting device includes a cam arm, a seat plate, a shim plate, and a screw member. The cam arm has an operating portion, an input portion laterally spaced from the operating portion, and a fulcrum portion laterally and downwardly spaced from the operating portion and the input portion. The seat plate, which is disposed between the cam arm and the erection piece of the steel frame and is in contact with the erection piece of the steel frame, has an engaging portion that contacts the working portion of the cam arm and a lateral space from the engaging portion. And a screw hole provided in a portion corresponding to the input portion of the cam arm and penetrating vertically. The shim plate is disposed between the cam arm and the erection piece of the gantry,
It contacts the fulcrum of the cam arm and the erection piece of the gantry. Then, the screw member is screwed into a screw hole of the seat plate, and comes into contact with an input portion of the cam arm to input a support load to the cam arm.

When the screw member is screwed into the screw hole of the seat plate and the tip of the screw member is brought into contact with the input portion of the cam arm, and the screw member is further screwed, the working portion of the cam arm has the distance from the working portion to the fulcrum. A supporting load increased according to the ratio of the distance from the input portion to the fulcrum portion, that is, the arm ratio. This supporting load supports the steel frame. The reaction force at this time is received by the gantry. In order to push up the steel frame by screwing the screw member and to lower the steel frame by unscrewing the screw member, the degree of verticality as well as the level of the steel frame is adjusted by adjusting the screwing amounts of the screw members of at least three load supporting devices. Can be adjusted.

The cam arm, the seat plate and the shim plate of the load supporting device are inserted between the erection piece of the steel frame and the erection piece of the gantry, and the load of the steel frame can be supported only by screwing the screw member. Since the level of the steel frame and the verticality can be adjusted by the load supporting device, the operability is good and simple.

Since the load supporting device is composed of four parts, it is inexpensive, and by appropriately selecting the arm ratio, a large supporting load can be obtained, so that the size can be reduced. Furthermore, when any one of the four parts is damaged, the part can be replaced and used, and the parts can be replaced easily.

Further, since a shim plate inserted between the cam arm and the erection piece of the gantry is provided, for example, a shim plate having an inclined surface or a shim plate having a different thickness is used, so that the steel frame can be formed. The range of level adjustment can be expanded.

[0034] The present invention also relates to a facility for use in placing a steel frame having at least four erection pieces mounted on an outer peripheral surface at intervals in a pile hole excavated downward from a reference plane, comprising: And a load supporting device. The pedestal, a through-hole to penetrate the steel frame,
There are the same number of erection pieces as the at least four erection pieces spaced around the through hole, and these erection pieces are mounted so as to correspond to the steel erection pieces. The load supporting device is disposed between each erection piece of the gantry and each erection piece of the steel frame, and is capable of adjusting a level in a vertical direction and a position in a horizontal direction.

In addition to the functions and effects obtained by the above-described equipment, the equipment according to the present invention can adjust the horizontal position of the steel frame, so that the steel frame can be more accurately arranged in the pile hole.

According to still another aspect of the present invention, the load supporting device is the same as the above-described load supporting device in that the load supporting device includes a cam arm, a seat plate, a shim plate, and a screw member. And a frame surrounding the shim plate. The frame includes a first groove into which the steel erection piece can be inserted, a bolt for fixing the steel erection piece inserted into the first groove, and a second groove into which the erection piece of the gantry can be inserted. It has a groove and at least two bolts that can be brought into contact with the left and right side surfaces of the erection piece of the gantry inserted into the second groove.

The steel erection piece inserted into the first groove of the frame is fixed by bolts. And
When one of the bolts facing the left and right sides of the erection piece of the gantry inserted into the second groove of the frame is kept in a state of projecting a predetermined length toward one side, and the other bolt is tightened, a steel frame is formed. Moves horizontally until one side hits one bolt. Thus, the frame can be moved in two horizontal directions at right angles using the frames of at least four load bearing devices.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of constructing a pillar is shown in FIG.
With reference to FIG.
How to build a pillar inside. Here, for example, when the pillar to be constructed is located on the first basement floor,
When the pillar to be constructed is located on the second basement floor, it is the ground surface on the first basement floor. The reference plane 10 is appropriately
The cement slab 14 is spread and leveled.

In constructing the pillar, the pile hole 12 is excavated, the casing 16 is inserted into the pile hole 12, and a reinforcing cage (not shown) is inserted into the pile hole 12 as in the conventional case.

According to the present invention, the pedestal 24 having the through hole 20 through which the steel frame 18 penetrates and at least three erection pieces 22 attached at intervals around the through hole 20 is formed. It is installed on the reference plane 10 so as to be located substantially at the center of the pile hole 12 above the pile hole 12. Concrete slab 1 on reference surface 10 as shown
When there is 4, the gantry 24 may be installed on the concrete slab 14, and the reference plane 10 has such a purpose.
It is preferable that the gantry 24 is appropriately fixed.

The steel frame 18 has at least three erection pieces 22 and the same number of erection pieces 26. These erection pieces 26 correspond to the erection pieces 22 of the gantry 24, that is, the steel frames 18.
Is brought into a correct position, the erection piece 26 of the steel frame 18 is mounted so as to be vertically aligned with the erection piece 22 of the gantry 24. The steel frame 18 thus formed is lifted by a wire 28 hanging from a crane (not shown), brought above the gantry 24, penetrated through the through hole 20, and guided into the pile hole 12.

When the steel frame 18 is a straight pillar, when the steel frame 18 is lifted, the center of gravity is generally suspended. That is, the lifting point is correctly determined so that the vertical virtual plane connecting the two lifting points by the wire 28 passes through the center of gravity of the steel frame 18 (see the above-mentioned patent publication). However, in the present invention, the vertical adjustment by the load support device described later is performed. Therefore, it is not always necessary to suspend the center of gravity.

After guiding the steel frame 18 into the pile hole 12, the steel frame 1
8 and the erection piece 22 of the gantry 24 are vertically aligned, and the load support device 30 capable of adjusting the level in the up and down direction is placed between each erection piece 22 of the gantry 24 and each erection piece 26 of the steel frame 18. And the steel frame 18 is lowered.

After the steel frame 18 is placed on the load supporting device 30, the load of the steel frame 18 is transmitted to the gantry 24 via the erection piece 26 of the steel frame 18, the load supporting device 30 and the erection piece 22 of the gantry 24, and the gantry 24 It is received by the reference plane 10. Therefore, it is not necessary to lift the steel frame 18 with a crane.

After the steel frame 18 has been supported by the at least three load supporting devices 30, the level of the steel frame 18 is adjusted by the load supporting device 30, and at least one inclinometer 32 attached to the steel frame 18 near the reference plane 10. While the inclination of the steel frame 18 is measured, the steel frame 18 is made vertical by at least three load supporting devices 30. Here, in the vicinity of the reference plane 10, the worker on the reference plane 10 approaches the inclinometer 32 without taking a particularly unnatural posture,
What is necessary is just to set it as the range which can be measured.

As the inclinometer 32, for example, a servo accelerometer using a pendulum can be used. It has a pendulum, a displacement detector for detecting the displacement of the pendulum, a coil attached to the pendulum, and a magnet surrounding the coil. When acceleration is applied and the pendulum moves from the equilibrium point, the displacement detector outputs the change as a signal. The output signal is amplified by the servo amplifier, and the coil and the magnet work to return the pendulum to the equilibrium point. At this time, since the magnitude of the DC current flowing through the coil is proportional to the applied acceleration, the operation principle is to measure the current. When the steel frame 18 to which this servo accelerometer is attached tilts,
As the pendulum tilts, an acceleration corresponding to the component force of the earth's gravity is applied. This acceleration is measured as a DC current flowing through the coil. Actually, since the angle converted from the DC current is displayed, this angle is read from the inclinometer 32. The servo accelerometer is commercially available from Japan Aviation Electronics Industry, Ltd. under the trade name of MC100L or JA-23MA. After the vertical adjustment of the steel frame 18, concrete 36 is cast into the pile hole 12 via the tremy tube 34 to form a pillar.
At this time, the muddy water 38 is preferably filled in the pile hole 12.

Another method of constructing a pillar in a pit 12 excavated from the reference plane 10 is shown in FIG. 1 again. A gantry 24 having at least four spaced erection pieces 22 is mounted on a through hole 2.
0 is located on the reference plane 10 such that the 0 is located at the upper center of the pile hole 12. In the present invention, the number of the erection pieces 22 is varied to adjust the position of the steel frame 18 in the horizontal direction. In order to adjust the position of the steel frame 18 in the two horizontal orthogonal directions x and y, at least two positions positioned in one direction x of the steel frame 18 and at least two positions positioned in the other direction y respectively. It is based on the empirical fact that the position can be easily and quickly adjusted by adjusting the position with.

At least four erection pieces 22
Erection pieces 26 of the gantry 24
The steel frame 18 attached so as to correspond to the above is lifted and penetrated through the through hole 20 of the gantry 24 and guided into the pile hole 12.

Thereafter, the erection piece 2 of the steel frame 18
6 and the erection piece 22 of the gantry 24 are vertically aligned, and the load support device 40 (FIGS. 6 and 7) capable of adjusting the level in the vertical direction and the position in the horizontal direction is adjusted to each erection piece of the gantry 24. The steel frame 18 is lowered by being arranged between the erection pieces 22 and the erection pieces 26 of the steel frame 18.

The load of the steel frame 18 is transmitted to the gantry 24 via at least four load supporting devices 40, and after being received by the gantry 24, the horizontal position of the steel frame 18 is adjusted by the at least four load supporting devices 40.

Thereafter, at least four load supporting devices 4
0 to adjust the level of the steel frame 18 and measure the tilt of the steel frame 18 by at least one inclinometer 32 attached to the steel frame 18 in the vicinity of the reference plane 10 while three of the at least four load bearing devices 40 are being measured. Or use more to make the steel frame 18 vertical.

Then, concrete 26 is poured into the pile hole 12 by the tremy tube 34 to construct a pillar.

In the above-described embodiment, the level adjustment and the vertical adjustment of the steel frame 18 are performed after the horizontal position of the steel frame 18 is adjusted. However, the order may be reversed. That is,
After the level adjustment and the vertical adjustment of the steel frame 18, the steel frame 18 is adjusted.
The horizontal position can be adjusted. In this specification, to adjust the horizontal position of the steel frame by the load supporting device and to make the steel frame vertical by the load supporting device does not mean that these are performed in time series, This means that either may be performed first.

In carrying out another method of constructing a column, four erection pieces 2 are used, as shown in FIG.
Preferably, 2 is attached to the gantry 24 and thus four erection pieces 26 are attached to the steel frame 18. In this case, four erection pieces 22
Are two erection pieces 22 located adjacent to each other.
Are arranged so as to substantially intersect at an angle of 90 °, and the two erection pieces 22 located at portions facing each other are located substantially in the same plane. The same applies to the four erection pieces 26.

More preferably, a plane A including two erection pieces 22 and 26 located at a portion facing each other and a plane B including another two erection pieces 22 and 26 located at a portion facing each other. This means that the four erection pieces 22 and 26 are arranged at equal intervals around the intersection C, that is, the mode shown in FIG.

In practicing the method of constructing a column, two inclinometers 32 are preferably mounted on each of two substantially orthogonal sides of the steel frame 18 near the reference plane 10. As shown in FIG. 2, the steel frame 18 has a cross section in a plane shape, and includes a central portion 44 including four legs and a central portion 4.
4 includes two inclinometers 32 on each of the two side portions 45 orthogonal to each other.
Attach. When the steel frame 18 is made of a steel pipe, the inclinometer 32 is attached to each of two orthogonal tangent planes.

When constructing the columns, the load supporting device 30 is used to make the steel frame 18 vertical while the inclination of the steel frame 18 is measured by the inclinometer 32, and the concrete 36 is poured into the pile hole 12 repeatedly. The steel frame 18 is prevented from being displaced from the vertical by placing the concrete 36.

When the casing 16 is inserted into the pile hole 12 as in the illustrated embodiment, it is preferable that the gantry 24 be fixed to the casing 16 when the gantry 24 is installed on the reference surface 10. In this way, the casing 16 can have the anchoring function of the gantry 24.

Referring to FIG. 2 showing a planar state and FIG. 3 showing a cross-sectional state, the equipment for arranging steel frames according to the present invention has at least three erection pieces 26 attached at intervals to the outer peripheral surface. This is equipment used when arranging the steel frame 18 in the pile hole 12 excavated downward from the reference plane 10, and includes a gantry and a load support device.

The gantry 24 has a through-hole 20 through which the steel frame 18 penetrates, and the same number of erection pieces 22 as the at least three erection pieces 26 spaced around the through-hole 20.
Are attached so as to correspond to the erection piece 26 made of steel.

The load supporting device is disposed between each erection piece 22 of the gantry 24 and each erection piece 26 of the steel frame 18. When the load support device is vertically adjustable, the steel frame 18 and the gantry 24 each have at least three erection pieces 26, 22;
When the load supporting device can adjust the level in the vertical direction and the position in the horizontal direction, the steel frame 18 and the gantry 24 can be adjusted.
Are at least four erection pieces 26,
22.

Referring to FIGS. 4 and 5 showing a side view of the load supporting device 30 capable of adjusting the level in the vertical direction, the load supporting device 30 includes a cam arm 50, a seat plate 52, a shim plate 54, and a screw member 56.

The cam arm 50 includes an operating portion 58, an input portion 59 laterally spaced from the operating portion 58, and a fulcrum laterally and downwardly spaced from the operating portion 58 and the input portion 59. A part 60. The input unit 59 is the operation unit 5
8, the input portion 59 may be located directly above or below the action portion 58, in addition to being directly beside. On the other hand, the fulcrum part 60 is located below the operation part 58 and the input part 59 in the horizontal direction, and the operation part 58 and the input
And the fulcrum 60 to form a lever.

In the illustrated embodiment, the cam arm 50 is formed by grinding and normalizing structural carbon steel into the following shape. As shown in FIG.
8 has a cylindrical surface 61 convex upward, and a fulcrum 60 of the cam arm 50 has a cylindrical surface 62 convex downward.
Having. The cylindrical surface 61 and the cylindrical surface 62 are formed by connecting circular arcs of radii R ₁ and R ₂ respectively over a certain width perpendicular to the paper surface. The radii R ₁ and R ₂ may be the same size or may be different sizes.

For example, the nominal length L ₁ of the cam arm 50 is set to 1
When deciding to 20-150 mm, defining a center distance L ₂ of the cylindrical surface 61, 62 to 10-30 mm, it is possible to determine the radius R _1, R ₂ to 20-40 mm. The width of the cam arm 50 perpendicular to the plane of the paper is determined based on the required supporting load. Since the cylindrical surface 61 of the action portion 58 comes into surface contact with the engagement portion of the seat plate as described later, it is preferable to define the range so that the center angle α is approximately 100 to 120 °. On the contrary,
The cylindrical surface 62 of the fulcrum portion 60 may be in line contact with the shim plate 54 to fulfill the function as a fulcrum, and the central angle may be several degrees. Above the cam arm 50, the inclined surface 63 is connected to the cylindrical surface 61, and the horizontal surface 64 is connected to the inclined surface 63. On the other hand, on the lower side of the cam arm 50, the two inclined surfaces 65 and 66 are connected to the cylindrical surface 62, and the inclined surface 65 is connected to an extension of the cylindrical surface 61.
Are connected to a vertical surface 67.

The seat plate 52 is disposed between the cam arm 50 and the erection piece 26 made of steel, and partially contacts the erection piece 26.
And a screw hole 71 penetrating vertically provided at a position corresponding to the input portion 59 of the cam arm 50 at a lateral distance from the engaging portion 70.
And The lower surface of the seat plate 52 facing the cam arm 50 has a shape that does not come into contact with the cam arm 50 at a portion other than the engagement portion 70.

In the embodiment shown, the seat plate 52 is made by grinding structural carbon steel, and the engaging portion 70 of the seat plate 52 has a cylindrical surface that is concave upward. This cylindrical surface fits and snugly fits the cylindrical surface of the working part 58 of the cam arm 50. The portion of the seat plate 52 that contacts the erection piece 26 is preferably a surface having a low coefficient of friction. For example, the coefficient of friction is reduced by increasing the finishing accuracy of the surface or by fitting a resin plate such as nylon.

The shim plate 54 is disposed between the cam arm 50 and the erection piece 22 of the gantry.
The fulcrum 60 and the erection piece 22 are in contact with each other. The shim plate 54 is formed such that a surface 55 that contacts the fulcrum 60 of the cam arm 50 is an inclined surface, as shown in the figure. As a result, the level can be adjusted.

The screw member 56 is screwed into the screw hole 71 of the seat plate 52 and comes into contact with the input portion 59 of the cam arm 50 to input a supporting load to the cam arm 50. In the illustrated embodiment, a hexagon socket head cap screw is used. It is. The tip of the screw member 56 or the surface of the input portion 59 of the cam arm 50 preferably has a low coefficient of friction. For example, the tip of the screw member 56 may be made spherical, or a resin plate such as nylon may be attached to the input portion 59 to have a low friction coefficient.

When the steel frame is to be supported by the load supporting device 30, the shim plate 5 is placed on the erection piece 22 of the gantry.
4. The cam arm 50 and the seat plate 52 are placed in this order, and the steel erection piece 26 is placed on the seat plate 52. When the ratchet tool 74 is inserted into the hexagonal hole of the screw member 56 and the screw member 56 is screwed, the input portion 59 of the cam arm 50 is pushed out downward, and the action portion 58 of the cam arm 50 rotates about the fulcrum 60 and moves upward. Moving. With the movement of the action portion 58 of the cam arm 50, the cylindrical surface 61 of the action portion 58 and the cylindrical surface of the engagement portion 70 of the seat plate 52 are engaged with each other, so that the seat plate 52 slightly moves in the horizontal direction. The load of the steel frame is received by the friction between the screw member 56 and the screw hole 71 of the seat plate 52. Working part 5 of cam arm 50
8 and the thickness of the shim plate 54, the level can be adjusted, and the vertical movement of the steel frame can be adjusted by moving the action portions 58 of the cam arms 50 of at least three load supporting devices 30.

The load supporting device 40 whose level is adjustable and whose position in the horizontal direction is adjustable is shown in FIG.
Referring to FIG. 7 showing the front state, the cam arm 50 is shown.
, A seat plate 52, a shim plate 54, a screw member 56, and a frame 80. That is, the load supporting device 40
The load support device 30 is different from the load support device 30 in that the load support device 30 includes a frame 80 surrounding a central portion of each of the cam arm 50, the seat plate 52, and the shim plate 54.

The frame 80 is formed in an elongated ring shape, and has a first groove 82 into which the erection piece 26 of the steel frame 18 can be inserted, and a bolt 84 for fixing the erection piece 26 of the steel frame inserted into the first groove 82. And the gantry 24
A second groove 86 into which the erection piece 22 can be inserted;
The erection piece 2 of the gantry inserted into the second groove 86
At least two bolts 8 capable of contacting the left and right side surfaces of the two
8, 90. Since the bolts 84 are for fixing the erection piece 26, the bolts 84 are vertically spaced from each other.
Preferably, one side 9 of the frame 80 is provided.
Screw into 2. On the other hand, the bolts 88 and 90 are pressed against the erection piece 22 and
6 is to be moved, a bolt 90 is screwed into one side 92 of the frame 80 and a bolt 88 is screwed into the other side 93 of the frame 80. The frame 80 can be made by forging structural carbon steel.

The first groove 82 and the second groove 86 of the frame 80 are in the form of one communicating groove, but the second groove 86 has a larger groove width than the first groove 82. The groove width of the first groove 82 is
What is necessary is just to be slightly larger than the thickness of the erection piece 26. On the other hand, the groove width of the second groove 86 is
And the cam arm 50, the seat plate 52, and the shim plate 54 of the load supporting device 30 enter the second groove 86. Further, the two groove surfaces 87 of the second groove 86 correspond to the first groove 82 in a front view.
From both sides. As a result, the first groove 82 and the second groove 86 have a shape in which the front shape is convex, and the center of the distance between the two groove surfaces 87 substantially corresponds to the center of the first groove 82. First of frame 80
When the erection piece 26 is inserted into the groove 82 and the frame 80 is hung on the erection piece 26 and hangs down, the vertical length of the first groove 82 is determined so that the lower portion of the erection piece 26 extends into the second groove 86. .

The following describes how to place the steel frame in the pile hole using the load supporting device 40. First, the gantry 24 is fixed to the casing 16 as shown in FIG. The illustrated gantry 24 has a hole forming member 100 having an octagonal planar shape in the center, and the inside thereof is a through hole 20. 4
Two support members 102 are fixed to every other side of the hole forming member 100, and four reinforcing members 104 are fixed to two adjacent support members 102. The four erection pieces 22 are fixed to the remaining sides of the hole forming member 100.

The steel frame 18 lifted by the crane is guided from the through hole 20 into the pile hole 12, and the erection piece 26 of the steel frame 18 and the erection piece 22 of the gantry 24 are connected to each other as shown in FIG.
And as shown in FIG. The erection piece 26 is inserted into the first groove 82 of the frame 80 of the load supporting device 40, and the erection piece 2 is inserted into the second groove 86.
Insert 2. Frame 80 to erection piece 26
And the frame 80 is fixed to the erection piece 26 by screwing the bolt 84. Thereafter, the cam arm 50, the bottom plate 52, and the shim plate 54 are put between the erection pieces 26 and 22, and lifting by the crane is released. As a result, the load of the steel frame 18 is received by the four load supporting devices 40 and the gantry 24.

In FIG. 7, for example, when the steel erection piece 26 is to be moved to the right to adjust the position, the left bolt 88 is loosened and the right bolt 90 is screwed into. 22, the frame 80 moves rightward. When the frame 80 moves rightward, the erection piece 26 moves rightward with respect to the erection piece 22. By performing such an adjustment using the two load supporting devices 40 that are opposed to each other in FIG. 2, the position of the steel frame 18 can be adjusted in the horizontal x direction. In addition, another 2
With the two load supporting devices 40, the position of the steel frame 18 can be adjusted in the horizontal y direction.

After the horizontal position adjustment of the steel frame 18 is completed, the bolts 88 and 90 are loosened, and the screw member 56 is screwed in to perform level adjustment and vertical adjustment. After all the adjustments are completed, it is preferable to prevent the steel frame 18 from tipping over by tightening a bolt 94 screwed into the lower end of the frame 80.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a method for constructing a pillar according to the present invention.

FIG. 2 is a plan view showing an embodiment of the equipment for arranging steel frames according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a side view showing an embodiment of the load supporting device.

FIG. 5 is a side view of a cam arm used for the load supporting device.

FIG. 6 is a side view showing another embodiment of the load supporting device.

FIG. 7 is a front view of the load supporting device shown in FIG. 6;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 reference plane 12 pile hole 16 casing 18 steel frame 20 through hole 22, 26 erection piece 24 gantry 30, 40 load support device 32 inclinometer 50 cam arm 52 seat plate 54 shim plate 56 screw member 80 frame

Continued on the front page (72) Inventor Shuichi Nagataki 1 Tomi-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 2D047 AB04 2D050 AA07 AA11 CA01 CA05 EE04 EE10 EE19

Claims (10)

[Claims] 1. A method of constructing a pillar in a pile hole excavated downward from a reference plane, comprising: a through-hole for penetrating a steel frame; and at least three holes attached around the through-hole at intervals. Mounting a gantry having two erection pieces on the reference surface such that the penetrated hole is located above the pile hole; and having at least three erection pieces as the number of erection pieces; Lifting a steel frame attached so as to correspond to the erection piece of the gantry, penetrating the pierced hole of the gantry, and guiding it into the pile hole, vertically moving the erection piece of the steel frame and the erection piece of the gantry A load support device that is aligned in the vertical direction and that can adjust the level in the vertical direction is mounted on each of the erection pieces of the gantry and each of the steel frames. Lowering the steel frame by placing the steel frame vertically with the load supporting device while measuring the inclination of the steel frame by at least one inclinometer attached to the steel frame near the reference plane. A method of constructing a pillar, comprising: placing concrete in the pile hole. 2. A method of constructing a pillar in a pile hole excavated downward from a reference plane, comprising: a through-hole for penetrating a steel frame; and at least four holes attached around the through-hole. Mounting a gantry having two erection pieces on the reference surface such that the penetrated hole is located above the pile hole; and having at least four erection pieces and the same number of erection pieces. Lifting a steel frame attached so as to correspond to the erection piece of the gantry, penetrating the pierced hole of the gantry, and guiding it into the pile hole, vertically moving the erection piece of the steel frame and the erection piece of the gantry Erection of the gantry with a load support device that is aligned in the direction, level adjustable in the vertical direction, and position adjustable in the horizontal direction. Disposing a steel frame between a piece and each erection piece of the steel frame, adjusting a horizontal position of the steel frame by the load supporting device, at least one of the steel frames being attached to the steel frame near the reference plane. A method for constructing a column, comprising: verticalizing the steel frame by the load supporting device while measuring the inclination of the steel frame by using two inclinometers; and placing concrete in the pile hole. 3. The erection piece is mounted on the gantry, wherein the erection pieces intersect at a substantially 90 ° angle with the extension lines of two adjacent erection pieces. And,
Two erection pieces located at opposing portions are arranged to be substantially in the same plane,
The method for constructing a pillar according to claim 2. 4. The inclinometer according to claim 1, wherein two of the inclinometers are mounted on substantially perpendicular side surfaces of the steel frame in the vicinity of the reference plane, and measure the inclination of the steel frame. How to build pillars. 5. The method according to claim 4, wherein, while the inclination of the steel frame is measured by the inclinometer, the steel frame is vertically set by the load support device and concrete is poured into the pile hole. How to build the pillars described. 6. The method according to claim 1, wherein a casing is inserted into the pile hole prior to installing the gantry on the reference surface, and the gantry is fixed to the casing when the gantry is installed on the reference surface. A method for constructing a pillar according to claim 3. 7. A facility for use in arranging a steel frame having at least three erection pieces attached to an outer peripheral surface at intervals in a pile hole excavated downward from a reference plane, wherein the steel frame penetrates the steel frame. And a plurality of erection pieces equal in number to the at least three erection pieces spaced around the pierced hole, and the erection pieces were mounted so as to correspond to the erection pieces of the steel frame. An equipment for arranging a steel frame, comprising: a gantry; and a load supporting device arranged between each erection piece of the gantry and each erection piece of the steel frame and capable of adjusting a vertical level. 8. The load supporting device according to claim 1, further comprising: an operating part, an input part laterally spaced from the operating part, and a laterally and downwardly spaced part from the operating part and the input part. A cam arm having a fulcrum, an engagement portion disposed between the cam arm and the erection piece of the steel, and a seat plate that contacts the erection piece of the steel, and an engagement portion that contacts an action portion of the cam arm; A seat plate, which is provided at a position corresponding to the input portion of the cam arm and is vertically spaced from the engagement portion and has a screw hole vertically penetrating therethrough, between the cam arm and the erection piece of the gantry; A shim plate that contacts the fulcrum of the cam arm and the erection piece of the gantry, and is screwed into a screw hole of the seat plate, and contacts the input portion of the cam arm to And a screw member for inputting a bearing load on the arm, equipment for steel arrangement according to claim 7. 9. A facility for arranging a steel frame having at least four erection pieces attached to an outer peripheral surface at intervals in a pile hole excavated downward from a reference plane, wherein the steel frame penetrates the steel frame. And a plurality of erection pieces equal in number to the at least four erection pieces spaced around the pierced hole. A frame, and a load supporting device disposed between each erection piece of the gantry and each erection piece of the steel frame, and capable of adjusting the level in the vertical direction and adjusting the position in the horizontal direction. . 10. The load supporting device according to claim 1, further comprising: an operating portion, an input portion laterally spaced from the operating portion, and a laterally and downwardly spaced direction from the operating portion and the input portion. A cam arm having a fulcrum, an engagement portion disposed between the cam arm and the erection piece of the steel, and a seat plate that contacts the erection piece of the steel, and an engagement portion that contacts an action portion of the cam arm; A seat plate, which is provided at a position corresponding to the input portion of the cam arm and is vertically spaced from the engagement portion and has a screw hole vertically penetrating therethrough, between the cam arm and the erection piece of the gantry; A shim plate that contacts the fulcrum of the cam arm and the erection piece of the gantry, and is screwed into a screw hole of the seat plate, and comes into contact with an input portion of the cam arm. A screw member for inputting a support load to the arm, a frame surrounding the cam arm, the seat plate, and the shim plate, the first groove being capable of inserting the erection piece of the steel frame, and being inserted into the first groove. A bolt for fixing the erection piece of the steel frame, a second groove in which the erection piece of the gantry can be inserted, and at least a left and right side surface of the erection piece of the gantry inserted in the second groove. The equipment for steel frame placement according to claim 9, comprising a frame having two bolts.