JP7275793B2 - Position adjusting device and method for adjusting position of structural column - Google Patents

Description

The present invention relates to a position adjusting device used to adjust the erection position of a structural column inserted into an underground hole where piles are to be constructed later, and a position adjusting method for a structural column using the position adjusting device. Regarding.

Conventionally, as the scale of underground spaces continues to grow, the upside-down construction method is often used for constructing structures from the perspective of shortening the construction period and considering the surrounding environment. The reverse construction method is a construction method in which the underground frame is built from the upper floor to the lower floor by repeating the excavation of the ground and the construction of the frame while using the floor beams of the building itself as strut support. , Before starting excavation of the ground, bury the structural columns supporting the floor beams in the ground.

Steel pillars are generally used as structural pillars, but when constructing a reinforced concrete structure, they can be used as permanent underground pillars instead of steel pillars. Structural columns made of precast reinforced concrete are being adopted.

For example, Non-Patent Document 1 discloses an example of applying a precast reinforced concrete structural column (hereinafter referred to as an HSPC structural column) having a rectangular shape in cross section to a high-rise building, and a method for adjusting the position of the HSPC structural column. there is

Specifically, after hanging the HSPC structural column in the underground hole, the guide roller for XY alignment adjustment installed on the mounting frame installed on the ground surface is brought into contact with the side surface near the upper end of the HSPC structural column. . In addition, a plurality of pantographs are suspended by using a casing that protects the hole wall provided in the upper half of the underground hole and expands and contracts appropriately, and these pantographs are brought into contact with the side surface of the HSPC structure column at the intermediate height position. .

In addition, the XY alignment adjustment guide rollers are used to adjust the planar view position of the HSPC structure column, and the expansion and contraction amounts of the pantographs are adjusted to adjust the verticality of the HSPC structure column.

"Development of Ultra High-Strength Precast Reinforced Concrete Structural Columns and Application to High-Rise Buildings", Taisei Engineering Center Bulletin No. 42, 2009

In the above erection method, the pantograph is generally placed on the side surface of the HSPC structure column formed with a rectangular cross section in a plan view, at a position where it can be brought into contact with the flat surface. be. At this time, after predetermining the erection position of the framing column, if a tremie pipe is placed in the gap between the HSPC framing column and the underground hole in order to post-pour the concrete, the position will be the pantograph. There is no choice but to set it near the outside corner of the HSPC frame column where there is no

When there is a sufficient gap between the HSPC framing column and the hole wall of the underground hole, the tremie pipe can be easily inserted and arranged in the vicinity of the outside corner of the HSPC framing column. However, in recent years, the need for super high-rise reinforced concrete buildings has increased, and if precast concrete columns are used as underground columns that support large axial forces, it will be necessary to increase the size of the member cross section.

As a result, it tends to be difficult to secure a space where the tremie pipe can be inserted between the hole wall of the underground hole and the vicinity of the external corner of the structural column. As a result, restrictions were imposed on the construction method, such as the inability to adopt the method of post-casting concrete.

The present invention has been made in view of such problems, and its main purpose is to make it possible to increase the cross-section of the structure column while using the underground hole having the existing cross-sectional diameter. An object of the present invention is to provide a position adjusting device for adjusting the erection position of a structural column and a position adjusting method of the structural column.

In order to achieve such an object, the position adjusting device of the present invention is a position adjusting device for adjusting the erection position of a structural column having a rectangular cross section inserted into an underground hole, wherein the structural column and the ground a pressing device located between the hole wall of the hollow and at the outer corner of the structural column in plan view to press the hole wall; and a pressing device installed on the structural column to support the pressing device. A pressing device support member, a pressing device contact plate installed on the structural column and in contact with the pressing device, and a structural column contact member connected to the pressing device contact plate via a reinforcing member. and a reaction force receiving member, wherein the pressing device has a base plate and an expansion device installed on the surface of the base plate, and the back surface of the base plate is supported by the pressing device support member. is in contact with the pressing device contact plate, and the expansion and contraction device comprises a plane member in contact with the hole wall, and an expansion and contraction mechanism provided between the plane member and the base plate. . Further, the pressing device supporting member and the reaction force receiving member are installed in an embedded portion embedded in the foundation pile of the structural column.

Further, the position adjusting device of the present invention is characterized in that the base plate is provided with a hook that hooks onto the pressing device supporting member. Further, the structural pillar abutting member is made of a plate material formed to have a V-shaped cross-section to abut against the protruding corner of the structural pillar, and the pressing device contact plate is formed of a rectangular shape of the structural pillar. It is characterized by being arranged orthogonally to the diagonal line in the cross section.

A method for adjusting the position of a structural column according to the present invention uses a position adjusting device according to the present invention to adjust the erection position of a structural column having a rectangular cross section inserted into an underground hole. In this method, the framing column with the position adjusting device attached to the lower end of the outer surface is suspended to a predetermined depth of the underground hole, and the position adjusting device is attached to the lower end of the framing column. An external force is applied from the side through the pressing device provided to adjust the position of the structural column.

According to the above-described position adjusting device and structural column position adjusting method of the present invention, when a core material having a rectangular cross section such as a precast reinforced concrete structure is adopted for a structural column, the pressing device is placed at the outside corner of the structural column. can be placed in

As a result, a gap that is continuous in the height direction is provided at the widest position between the hole wall of the underground hole and the flat part located on the outer surface of the structural column, and the tremie pipe is inserted into this gap. can be placed. Therefore, as the cross section of the framing pillar increases, even if the ratio of the framing pillar to the underground hole having the existing cross-sectional diameter in which the pile is constructed later increases in plan view. It is possible to avoid interference between the pressing device and the tremie pipe and predetermine the erection position of the structural column, and then post-pour concrete into the underground hole.

Further, since the pressing device supporting member is installed on the structural column, the position adjusting device including the pressing device is supported by the structural column. As a result, the installation height of the position adjustment device can be reduced compared to the case of suspending the pantograph using a casing that protects the hole wall of the underground hole and arranging the pantograph in the height range of the casing as in the conventional technology. It can be installed on the lower end side of the structural column. Therefore, when adjusting the position of the framing pillar, it is possible to secure a large distance from the fulcrum set at the predetermined position on the upper end side of the framing pillar, thereby improving the erection accuracy of the framing pillar. .

According to the present invention, when adjusting the erection position of a structural column having a rectangular cross-section inserted into an underground hole, the position adjusting device is arranged at the protruding corner of the structural column, and the hole wall and the structure are adjusted. Since a gap that is continuous in the height direction is formed at the widest position between the flat part located on the outer surface of the true pillar, the tremie tube is arranged using this gap, and the underground hole is formed. Since concrete can be poured into the pillars, it is possible to increase the cross-section of the truss columns while utilizing underground holes with existing cross-sectional diameters in which piles will be constructed later.

It is a figure which shows the erection process of the structure pillar in the reverse hammering construction method in embodiment of this invention (the 1). It is a figure which shows the erection process of the structure pillar in the reverse hammering method in embodiment of this invention (the 2). It is a figure which shows the underground skeleton constructed|assembled by the reverse construction method in embodiment of this invention. It is a figure which shows a mode that the pillar part of the structure pillar in embodiment of this invention was mounted|worn with the position adjusting device. It is a figure which shows a mode that the erection position of the structure pillar in embodiment of this invention is being adjusted. It is a figure which shows the horizontal position adjustment apparatus in embodiment of this invention. It is a figure which shows the pressing device in embodiment of this invention. It is a figure which shows the reaction force receiving member and pressing device support member in embodiment of this invention. It is a figure which shows a mode that the hole wall of an underground hole is pressed by the pressing apparatus in embodiment of this invention (when the position adjusting apparatus is mounted|worn to a pillar part). It is a figure which shows a mode that a position adjustment apparatus is mounted|worn with the embedded part of the structure pillar in embodiment of this invention. FIG. 4 is a diagram showing how the pressing device according to the embodiment of the present invention presses against the hole wall of the underground hole (when the position adjusting device is attached to the embedded portion). FIG. 10 is a diagram showing another example of the pressing device according to the embodiment of the present invention (with mounting ears attached); It is a figure which shows the case where the pressing device and reaction force receiving member are integrated in embodiment of this invention.

The present invention relates to the reverse casting method, which is one of the methods for constructing the underground skeleton and underground structure of a building. In particular, the cross-sectional shape of the structural column does not have a shape similar to a underground hole such as a rectangular cross-section, and the ground has a past cross-sectional diameter (maximum 3000 mm) Disclosed is a position adjusting device and a method for adjusting the position of a framing column, which are suitable for a case where a sufficient gap cannot be secured with respect to a hole wall when inserted into a hollow hole.

Below, the details of the position adjustment device and the position adjustment method of the structural column using the position adjustment device will be described, but prior to this, the outline of the work procedure of the reverse hammering construction method will be described.

As shown in FIG. 1( a ), a stabilizing liquid W is supplied to the inside of a retaining wall (not shown) constructed to surround the planned construction position of the building and to the planned construction position of the foundation pile. After drilling the underground hole H while protecting the mouth with the casing P, as shown in FIGS. erect.

Next, as shown in FIG. 2( a ), the structure column 1 is suspended to a predetermined depth in the underground hole H, and the positioning device 3 is used to erect the structure column 1 . After that, as shown in FIG. 2(b), the tremie pipe T is placed in the gap between the structural column 1 and the underground hole H, and the reinforcing bar cage S is embedded so that concrete is poured to a predetermined height position. Place C and cure.

After curing the concrete C for a predetermined time, the gap between the underground hole H and the structure column 1 is backfilled, and then the underground floors are sequentially constructed downward while excavating from the ground surface, as shown in FIG. An underground skeleton 22 of a building is constructed using the structural columns 1 erected on the foundation piles 21 as permanent columns. Moreover, when the building under construction has a ground floor, the ground floor is simultaneously constructed in parallel with the construction work of the underground skeleton 22 .

Structural columns 1 erected by the above-described positioning device 3 are precast reinforced concrete structures having polygonal shapes such as squares and rectangles in cross section, structural columns made of steel pipes processed from steel materials, etc., H-shaped steel It is possible to adopt any core material that has a plurality of plane portions parallel to the axis on the outer surface, such as a steel material with a cross-shaped cross section (hereinafter referred to as cross H steel material) that is combined in a cross. In this embodiment, a structural column 1 made of ultra-high-strength precast reinforced concrete and having a square cross section is employed.

In addition, as shown in FIG. 3, the ultra-high-strength precast reinforced concrete structure true column 1 includes the ultra-high-strength precast reinforced concrete column portion 11 that functions as a permanent column of the underground frame 22, and the reinforced concrete foundation pile 21. and a steel-framed embedded portion 12 embedded in.

As shown in FIG. 4( a ), the column portion 11 is made of super-high-strength precast members 111 formed in a rectangular cross-section laminated in the height direction and tensioned using tendons (not shown). It is configured by connecting while connecting. Also, the buried portion 12 employs a cross H steel material as shown in FIG. 4(c).

<Positioning device>
The positioning device 3 used when erecting the structural column 1 into the underground hole H is a horizontal sill that applies an external force from the side to the vicinity of the upper end of the structural column 1 via a yattco 13 as shown in FIG. A position adjusting device 8 and a position adjusting device 4 arranged at a distance in the height direction from the horizontal position adjusting device 8 for applying an external force to the lower end side of the structural column 1 from the side are provided.

<Horizontal position adjustment device>
The horizontal position adjusting device 8 is generally installed at the mouth of the underground hole H during erection work of the structural column 1, and any device that is used when adjusting the position of the structural column 1 in a plan view can be used. may be adopted. In this embodiment, as shown in FIG. 5, a level adjustment frame 9 installed on top of a frame 2 installed at the mouth of an underground hole H, and a plurality of guides installed on this level adjustment frame 9 A roller device 10 is provided.

As shown in FIG. 6, a total of eight guide roller devices 10 are provided so that two guide roller devices are positioned near the external corners of the planar portion of the structural column 1 in plan view, and are extendable in the longitudinal direction. and a roller 102 installed at the tip of the arm 101 . Further, the arm 101 is arranged such that its base end is installed on the level adjustment stand 9 and its tip end can protrude toward the inner space of the level adjustment stand 9 in a plan view.

As a result, by extending and contracting the length of the arm 101, the roller 102 installed at the tip of the arm 101 comes into contact with the side surface of the roller 13 attached to the head of the structural column 1 inserted into the underground hole H. can be made Note that the roller 102 is brought into contact with the side surface of the roller 13 in a vertically rotatable state.

The level adjustment frame 9 is a tubular steel frame surrounding the underground hole H, and is equipped with a journal jack (not shown) inside. As a result, as shown in FIG. 5, the level adjustment pedestal 9 is placed on the pedestal 2 installed on the ground surface, and by adjusting the journal jacks appropriately, the eight guide roller devices 10 can be adjusted. The height level of the installed installation part can be adjusted horizontally.

<Positioning device>
The position adjusting device 4 attached to the lower end side of the structural column 1 can be attached to either the column portion 11 or the embedded portion 12 of the structural column 1, as shown in FIGS. Four sets of combinations of devices 5, reaction force receiving members 6, and pressing device support members 7 are provided, and are arranged at or near the external corners of the structural column 1, respectively. Then, as shown in FIG. 4(b), the pressing device 5 is suspended from the pressing device support member 7 installed on the structural column 1, and the hole wall of the structural column 1 and the underground hole H is installed. , and a reaction force receiving member 6 is arranged between the pressing device 5 and the structural column 1 .

As shown in the front view of FIG. 7A and the side view of FIG. and a telescopic device 53 installed on the surface. The expansion device 53 includes a surface member 54 having a surface contacting the hole wall of the underground hole H, and an expansion mechanism 55 installed on the back surface of the surface member 54 .

In addition, the hook 51 is provided with a hanging jig 56, and the hanging jig 56 has a structure that can be lifted or lowered by a lifting device such as a crane via a string material such as a wire. Any member may be adopted as long as it is provided.

As for the expansion mechanism 55, any mechanism that can push and pull the surface member 54 from the surface of the base plate 52 toward the hole wall of the underground hole H may be adopted. It uses a pantograph jack.

In addition, in the pantograph jack employed in the telescopic mechanism 55, the pressing device 5 is arranged at the outer corner with the narrowest interval formed between the hole wall of the underground hole H and the plane portion of the structural column 1. Taking this into account, the main feature is that it is designed to be thinner than the pantographs that are generally traded on the market.

Specifically, as shown in FIG. 7(b), it is composed of a driving arm 551 and a driven arm 552, one end of which is rotatably connected to the back surface of the surface member 54 via a pin, and a hydraulic jack 553. ing. The other end of the driven arm 552 is rotatably connected to the surface of the base plate 52 via a pin, and the other end of the drive arm 551 is rotatable to a hydraulic jack 553 via a pin. It is freely connected and slidably installed on the surface of the base plate 52 toward the other end of the driven arm 552 .

Therefore, as shown in FIG. 7B, when the hydraulic jack 553 is extended along the surface of the base plate 52 and the other end of the driving arm 551 is slid toward the other end of the driven arm 552, the driving The arm 551 and the driven arm 552 are raised from the surface of the base plate 52 and the plane member 54 is separated from the base plate 52 .

As a result, the surface member 54 is pushed toward the hole wall of the underground hole H, and thus comes into contact with the hole wall. In addition, the extensible mechanism 55 adjusts the amount of extrusion of the surface member 54 between the protruding corner of the framing pillar 1 and the framing pillar H in a state where the axial center of the underground hole H and the axial center of the framing pillar 1 are aligned. Ensure that it is larger than the separation distance from the hole wall. The reaction force when the surface member 54 presses the hole wall is transmitted to the structural column 1 via the reaction force receiving member 6 installed on the side surface of the structural column 1 .

The reaction force receiving member 6 secures a space in the height direction between the pressing device support member 7 and the pressing device 5 so that the reaction force receiving member 6 contacts the back surface of the pressing device 5 suspended from the pressing device support member 7 . The direction of arrangement is set so that the pushing direction of the surface member 54 in the expansion device 53 is the radial direction of the structural column 1 .

In the following, the details will be described for each case where the reaction force receiving member 6 and the pressing device support member 7 are mounted on the column portion 11 of the structural column 1 and when they are mounted on the embedded portion 12 .

<When installing the position adjustment device to the pillar part of the structure pillar>
As shown in FIGS. 4(a) and 4(c), the column portion 11 of the structural column 1 is composed of a precast member 111 having a rectangular cross section, and its outer surface is formed of four flat portions. . Therefore, the pressing device support member 7 and the reaction force receiving member 6 are installed at four external corner portions that are intersection positions of these four plane portions.

As shown in FIG. 8A, the reaction force receiving member 6 is provided on a pressing device contact plate 61 whose surface contacts the back surface of the base plate 52 of the pressing device 5, and on the back surface of the pressing device contact plate 61. The reinforcing member 63 and the structural column contact member 62 are provided.

Any pressure device contact plate 61 may be used as long as it has a smooth surface that contacts the back surface of the base plate 52 of the pressure device 5, and in the present embodiment, a flat steel plate is used. is employed. The structural column contact member 62 is made of a steel plate formed in a doglegged shape when viewed in cross section. It is installed at 63.

The reinforcing member 63 is made of the same steel material as the pressing device contact plate 61, and is installed so as to connect the back surface of the pressing device contact plate 61 and the protruding corner side surface of the structural column contact member 62. It has a function of preventing deformation of the pressing device contact plate 61 and a function of installing the structural column contact member 62 on the back surface of the pressing device contact plate 61 .

In the reaction force receiving member 6 having such a configuration, as shown in FIG. , so as to be perpendicular to the diagonal line of the structural column 1 , that is, perpendicular to the line perpendicular to the axis of the structural column 1 . As a result, the pressing direction of the surface member 54 of the pressing device 5 arranged so as to abut on the reaction force receiving member 6 can be oriented in the radial direction of the structural column 1 at each external corner of the structural column 1 . It becomes possible, and the reaction force can be made to act toward the axis of the structural column 1 .

As shown in FIG. 4(b), the pressing device support member 7 is a member that is installed above the reaction force receiving member 6 of the structural column 1 with an interval therebetween, as shown in FIG. 8(b). , a support plate 72 made of a steel plate having a ring hole 71 formed on its surface, and a reinforcing member 73 and an attachment member 74 installed on the back side of the support plate 72 .

The mounting member 74 is made of a steel plate having a V-shaped cross section in the same manner as the structural column contact member 62 provided in the reaction force receiving member 6, and the inner corner side constitutes the outer surface of the structural column 1. The protruding corner side is installed on the reinforcing member 73 so as to abut on each of the adjacent flat portions.

The reinforcement member 73 is made of the same steel material as the support plate 72, and is installed so as to connect the back surface of the support plate 72 and the protruding corner side surface of the mounting member 74, and has the function of preventing deformation of the support plate 72. and a function of installing the mounting member 74 on the back surface of the support plate 72 .

The ring hole 71 penetrates the structural column 1 in the axial direction so that the hook 51 provided on the base plate 52 of the pressing device 5 can be hooked from above when the pressing device support member 7 is installed on the structural column 1 . It is formed in a hole that

As shown in FIGS. 4(b) and 4(c), in the pressing device support member 7 having such a configuration, when the mounting member 74 comes into contact with the structural column 1, the surface of the support plate 72 is It is arranged so as to be orthogonal to the diagonal line of the structural column 1 , that is, parallel to the pressing device contact plate 61 of the reaction force receiving member 6 .

Both the reaction force receiving member 6 and the pressing device support member 7 may be installed in any manner as long as they are detachably installed on the column member 11 of the structural column 1. 1 is embedded with an insert nut (not shown), a bolt hole is provided in the structural column contact member 62, and the reaction force receiving member 6 is installed on the structural column 1 via a bolt.

Similarly, an insert nut is embedded in the mounting position of the pressing device support member 7, and a bolt hole is provided in the mounting member 74, and the pressing device support member 7 is installed on the structural column 1 via bolts. .

Further, in this embodiment, since the structural column 1 is formed with a rectangular cross section, the structural column contact member 62 provided on the reaction force receiving member 6 and the mounting member 74 provided on the pressing device support member 7 are formed to have a V-shaped cross section with an angle of 90°. However, this angle may be appropriately changed according to the cross-sectional shape of the structural column 1 (the angle of the external corner).

As shown in FIG. 4(a), the position adjustment device 4 with such a configuration is configured such that after the reaction force receiving member 6 and the pressing device support member 7 are installed at predetermined positions on the column portion 11 of the structural column 1, As shown in FIG. 4B, the pressing device 5 is attached to the structural column 1 by being suspended from the pressing device support member 7 . Then, the structural column 1 with these position adjusting devices 4 attached is inserted into the underground hole H as shown in FIG.

When inserting the structural column 1 with the position adjusting device 4 into the underground hole H, a string member such as a wire is connected to the hanging jig 56 of the pressing device 5 . In this way, the pressing device 5, which is only hung on the pressing device support member 7, can be pulled out of the underground hole H by a crane or the like at an appropriate timing, such as in an unforeseen situation such as a failure or after completion of the position adjustment work of the structural column 1. It can be lifted and recovered via

<When installing the position adjustment device to the embedded part of the structural column>
The reaction force receiving member 6 and the pressing device supporting member 7 can be installed in the embedded portion 12 of the structural column 1, but it is also possible to adopt a more simplified one by omitting some members. be. The reaction force receiving member 6 and the pressing device support member 7 having simplified structures will be described below.

As shown in FIGS. 10(a) and 10(b), the embedded portion 12 of the structural column 1 is made of cross H steel material, and the outer surface of the embedded portion 12 consists of four flanges of H-shaped steel. It is formed by a plane part. Therefore, the pressing device supporting member 7 and the reaction force receiving member 6 are installed at four positions that are intersecting positions when these four flanges are extended. In addition, as shown in FIG. 11, the crossing positions when the four flanges are extended are on the diagonal line of the column portion.

As shown in FIGS. 10(b) and 10(c), the reaction force receiving member 6 includes a pressing device contact plate 61 made of a steel plate whose surface contacts the back surface of the base plate 52 of the pressing device 5, and a pressing device contact plate. 61 and a reinforcing member 63 that reinforces it. Further, the pressing device contact plate 61 does not have the structural column contact member 62 because the back surface thereof can be directly welded to the embedded portion 12 of the structural column 1 . In addition, the reinforcing member 63 is installed on the back surface of the pressing device contact plate 61 so as to avoid the welding position with the embedded portion 12 of the structural column 1 .

As shown in FIGS. 10(a) and 10(b), the pressing device support member 7 comprises a support plate 72 made of a steel plate having a ring hole 71 formed on its surface. The reinforcing member 73 and the mounting member 74 are not provided because they can be welded directly to the embedded portion 12 of the .

As in the case of mounting on the column portion 11 of the structural column 1, the surface of the pressing device contact plate 61 of the reaction force receiving member 6 is arranged so as to be perpendicular to the diagonal line of the structural column 1 in plan view. , the pressing device contact plate 61 and the supporting plate 72 of the pressing device supporting member 7 are arranged in parallel.

As shown in FIGS. 10(a) and 10(c), the pressing device support member 7 and the reaction force receiving member 6 are fixed by welding to the opposite side ends of the adjacent flanges. It is not limited to this, and any means may be employed.

By the way, when the position adjusting device 4 is attached to the embedded portion 12 of the structural column 1, the distance between the pressing device 5 and the hole wall of the underground hole H is adjusted as shown in FIG. It is longer than when it is installed at Therefore, when the extension distance of the telescopic mechanism 55 provided in the pressing device 5 is insufficient, an attachment 57 having a predetermined member thickness is attached to the surface member 54, and when the telescopic mechanism 55 is extended, the attachment 57 is pushed into the ground. The hole wall of the hole H may be contacted.

In addition, as shown in FIG. 11, since the buried portion 12 has a smaller external shape in plan view than the column portion 11, the hanging jig 56 installed in the pressing device 5 and the position adjusting device 4 are attached to the column portion 11 of the structural column. If the pressing device 5 is installed at the same position as when it is attached to the underground hole H, the pressing device 5 cannot be lifted up from the underground hole H and recovered.

Therefore, when the position adjusting device 4 is attached to the embedded portion 12 of the structural column 1, as shown in FIG. Each of the pair of projecting ears 58 is formed of a plate material having a size that projects from the column portion 11 of the structural column 1 in plan view when installed in the embedded portion 12 of the structural column 1, as shown in FIG. It is

Then, the hanging jig 56 is installed at a position of the protruding ear 58 protruding from the column portion 11 . As a result, by connecting a string member such as a wire to the lifting jig 56, it is possible to lift and recover only the pressing device 5 from the underground hole H at an appropriate timing in the same manner as when it is attached to the column portion 11. becomes possible.

As described above, the position adjustment device 4 can be attached to either the outer surface of the column portion 11 or the buried portion 12 of the structural column 1. Therefore, as shown in FIG. It is also possible to place it in a position where the ground is stable. Therefore, without using the casing P provided in the underground hole H, an external force is applied from the side to the lower end side of the structural column 1 via the pressing device 5 to install it on the upper end portion of the structural column 1. The posture is controlled and the position is adjusted so that the axis of the structural column 1 is vertical, with the position of the side surface of the yattco 13 and the guide roller device 10 of the horizontal position adjusting device 8 abutting as a fulcrum. becomes possible.

<How to select the installation position of the position adjustment device>
When the position adjusting device 4 is attached to the structural column 1, securing a sufficient space between the horizontal position adjusting device 8 and the position adjusting device 4 will improve the verticality of the structural column 1 with higher accuracy. It is advantageous to secure in Therefore, the mounting position of the position adjusting device 4 is appropriately selected according to the construction conditions, the structure of the underground skeleton to be constructed, and the like.

However, when the position adjusting device 4 is attached to the embedded portion 12 of the structural column 1, the range is restricted. Specifically, the installable range is the height range L between the bottom surface of the column portion 11 and the upper end of the surplus portion 24 when the concrete C is placed, as shown in FIG. However, if a sufficient height cannot be secured between the upper end surface of the pressing device support member 7 and the lower end surface of the column portion 11, the pressing device 5 suspended from the pressing device support member 7 is lifted from the ground and removed. I can't.

Therefore, when the position adjusting device 4 can be attached to the embedded portion 12 of the structural column 1, the height range between the bottom surface of the column portion 11 and the upper end of the surplus portion 24 when the concrete C is placed The condition is that the distance between the upper end surface of the pressing device support member 7 and the lower end surface of the column portion 11 is L, and the distance is sufficient to allow the pressing device 5 to be lifted and removed.

When these conditions are satisfied, when the position adjusting device 4 is attached to the embedded portion 12 of the structural column 1, the mounting position of the position adjusting device 4 with respect to the structural column 1 and the fulcrum when adjusting the position of the structural column 1 It becomes possible to ensure a larger arrangement interval from the arrangement position of the horizontal position adjusting device 8 that becomes .

<Position adjustment method>
The method of adjusting the erection position of the structural column 1 using the above-described position adjusting device 4 is combined with the procedure of the reverse hammering method including the step of erecting the structural column 1 using the positioning device 3, as follows. to explain. In this embodiment, the case where the position adjusting device 4 is attached to the column portion 11 of the structural column 1 will be taken as an example, and the procedure will be described below.

Before inserting the structure column 1 into the underground hole H, as shown in FIG. A horizontal position adjusting device 8 is installed, the horizontal level is adjusted by a level adjusting frame 9, and the height levels of the eight guide roller devices 10 are adjusted horizontally.

First, as shown in FIG. 4(b), the position adjusting device 4 is attached so that the pressing device 5 is arranged at each of the four protruding corners of the column portion 11 on the lower end side of the structural column 1. . The structural column 1 to which the position adjusting device 4 is attached is lowered by a lifting device such as a crane, and is inserted to a predetermined depth of the underground hole H as shown in FIG. 2(a). A yattoko 13 is attached to the upper end portion of the framing column 1, and the framing column 1 is suspended and supported in the underground hole H through the yattoko 13. As shown in FIG.

As described above, the column portion 11 of the structural column 1 is formed by laminating and connecting a plurality of ultra-high-strength precast members 111 . Therefore, in the work of lowering the structure column 1, these ultra-high-strength precast members 111 are stacked and connected to form the column portion 11 in the underground hole H, and the reaction force receiving member 6 and the By installing the pressing device support member 7 and suspending the pressing device 5 from the pressing device support member 7 , the structural column 1 with the position adjusting device 4 attached thereto may be inserted into the underground hole H.

Next, positional adjustment is performed to pre-determine the construction column 1 suspended in the stabilizing liquid W in the underground hole H to the erection position set at the time of design.

Specifically, as shown in FIG. 5 , while adjusting the length by expanding and contracting the arms 101 of the eight guide roller devices 10 , the roller 102 is attached to the side surface of the roller 13 installed at the upper end of the structural column 1 . abut. Further, the extension device 53 of the pressing device 5 provided in the position adjustment device 4 is operated to bring the surface of the surface member 54 into contact with the hole wall of the underground hole H, and the back surface of the base plate 52 to the reaction force receiving member 6 . abut on.

Next, while extending and contracting the arm 101, the plan view position of the framing column 1 is adjusted, and the framing column 1 is positioned at the built-in position in the underground hole H in plan view. In this state, by appropriately expanding and contracting the expansion and contraction mechanisms 55 of the pressing devices 5 arranged at each of the external corners of the structural column 1, an external force is applied from the side to the lower end side of the structural column 1 via the reaction force receiving member 6. is applied, and the posture is adjusted so that the axis of the structural column 1 is vertical, with the position where the roller 102 is in contact with the side surface of the yattco 13 installed at the upper end of the structural column 1 as a fulcrum. control and position adjustment.

As a result, the structural column 1 inserted into the underground hole H can be arranged at the erection position set at the time of design. In this way, after finishing the erection work of the structural column 1, the tremie tube T is inserted and arranged in the underground hole H.

As shown in FIGS. 6 and 9, both the pressing device 5 of the position adjusting device 4 and the guide roller device 10 of the horizontal position adjusting device 8 are arranged at and near the outside corners of the structural column 1. Therefore, a space continuous in the height direction is prepared in the gap formed between the hole wall of the underground hole H and the planar portion of the structural column 1 . Therefore, the tremie tube is inserted and arranged in this space.

In this way, when the structural column 1 with a rectangular cross section is inserted into the underground hole H, which is circular in plan view, the widest gap formed between the hole wall and the structural column 1 is the hole wall of the underground hole H. and the plane portion of the structural column 1, and this space can be used for arranging the tremie tube T. Therefore, as the cross-sectional shape of the framing column 1 became larger, the ratio of the framing column 1 to the underground hole H having the existing cross-sectional diameter (up to about 3000 mm) in plan view increased. In this case as well, interference between the position adjusting device 4 for adjusting the erection position of the structural column 1 and the tremie pipe T is avoided, and after the erecting position of the structural column 1 is determined in advance, concrete is poured into the underground hole H. can be hit later.

After that, as shown in FIG. 2(b), the concrete C is poured through the tremie pipe T to a depth at which the reinforcing bar cage S is embedded in the underground hole H, and the concrete C is cured. After a predetermined time has elapsed, the pressing device 5 of the position adjusting device 4 is lifted and removed, and the removed pressing device 5 is reused for the position adjusting device 4 to be installed on the structural column 1 to be installed later.

When the concrete C placed in the underground hole H is confirmed to exhibit a predetermined strength, the underground hole H is backfilled and the casing P is removed, and then the underground skeleton 22 is constructed. That is, the basement floors are sequentially built downward while excavating from the ground surface, and after reaching the lowest floor by repeating the excavation of the ground and the construction of the basement floors, the foundation beams 23 are installed as shown in FIG. To construct.

At this time, as shown in FIG. 3, if the reaction force receiving member 6 and the pressing device support member 7 of the position adjusting device 4 are exposed on the basement floor, remove the bolt screwed to the insert nut, and Collect both. In this way, not only the pressing device 5 but also the reaction force receiving member 6 and the pressing device support member 7 can be reused for the position adjusting device 4 attached to the structural column 1 to be erected later.

When the position adjustment device 4 is installed in the embedded portion 12 of the structural column 1, the procedure of the position adjustment method is the same, but the reaction force receiving member 6 and the pressing device support member 7 are embedded in the foundation beam 23. Since it will be placed at the height where the

The position adjusting device and the position adjusting method of the structural column of the present invention are not limited to the above-described embodiments, and various modifications are possible without departing from the scope of the present invention.

For example, in the present embodiment, the structural column 1 formed with a rectangular cross section was taken as an example, but the structural column is not necessarily limited to this. If so, it can be adopted for the structural column 1 having any cross-sectional shape such as rectangular, triangular, and polygonal.

Further, in the present embodiment, a pantograph jack is used as the telescopic mechanism 55 of the pressing device 5, but it is not necessarily limited to this, and any telescopic mechanism that can be used underwater can be adopted. may

Furthermore, in the present embodiment, the reaction force receiving member 6 of the position adjustment device 4 is installed on the structural column 1, but the present invention is not limited to this, and the reaction force receiving member 6 is applied to the structural column 1. You can just touch it. Specifically, as shown in FIGS. 13(a) and 13(b), the reaction force receiving member 6 is fixed to the back surface of the base plate 52 of the pressing device 5 to be integrally formed. In this way, the reaction force receiving member 6 can be recovered at the same time when the position adjustment work of the structural column 1 is completed and the pressing device 5 is lifted from the ground surface and removed, which is economical.

In this case, the reaction force receiving member 6 is only hung from the pressing device supporting member 7 together with the pressing device 5 . However, when the structure column 1 is inserted into the underground hole H and the telescopic mechanism 55 of the pressing device 5 is extended to bring the surface member 54 into contact with the hole wall of the underground hole H, the structure of the reaction force receiving member 6 is reduced. The inner corner side of the true pillar contact member 62 abuts on the flat portion forming the outer surface of the pillar 1 . Therefore, even if the reaction force receiving member 6 is not installed on the structural pillar, the reaction force when the pressing device 5 presses the hole wall of the underground hole H can be transmitted to the structural pillar 1 .

In addition, in the present embodiment, the guide roller device 10 constituting the horizontal position adjusting device 8 is brought into contact with the side surface of the yattco 13 at a position corresponding to the plane portion of the structural column 1 in plan view. The contact position of the guide roller device 10 is not necessarily limited to this. For example, the direction in which the guide roller device 10 applies an external force to the side of the structural column 1 via the yattco 13 is the same as the direction of the external force applied to the structural column 1 by the pressing device 5 of the position adjustment device 4. You may adjust the arrangement position of the guide roller apparatus 10 so that it may become the same.

1 Structural column 11 Column part 12 Buried part 13 Yatko 2 Mounting frame 3 Positioning device 4 Position adjusting device 5 Pressing device 51 Hook 52 Base plate 53 Expansion device 54 Surface member 55 Expansion mechanism 56 Hanging jig 57 Attachment 58 Overhang ear 6 Reaction force Receiving member 61 Pressing device contact plate 62 Structural column contact member 63 Reinforcement member 7 Pressing device support member 71 Ring hole 72 Base plate 73 Reinforcement member 74 Structural column contact portion 8 Horizontal position adjusting device 9 Level adjustment stand 10 Guide Roller device 101 Arm 102 Roller 21 Foundation pile 22 Underground skeleton 23 Foundation beam

H Underground hole W Stabilizing liquid P Casing S Rebar cage C Concrete

Claims (5)

A position adjustment device that adjusts the erection position of a structural column having a rectangular cross section that is inserted into an underground hole,
a pressing device positioned between the structural column and the hole wall of the underground hole and positioned at a protruding corner of the structural column in a plan view and pressing the hole wall;
a pressing device support member installed on the structural column and supporting the pressing device;
a reaction force receiving member having a pressing device contact plate installed on the structural column and in contact with the pressing device, and a structural column contact member connected to the pressing device contact plate via a reinforcing member; , and
The pressing device has a base plate and an expansion device installed on the surface of the base plate, and the back surface of the base plate contacts the pressing device contact plate while being supported by the pressing device support member. ,
The expansion device is
a surface member abutting against the hole wall;
and an expansion mechanism provided between the surface member and the base plate . The position adjustment device according to claim 1,
A position adjusting device, wherein the pressing device supporting member and the reaction force receiving member are installed in an embedded portion embedded in the foundation pile of the structural column. The position adjustment device according to claim 1,
A position adjusting device , wherein the base plate is provided with a hook that hooks onto the pressing device supporting member . The position adjustment device according to claim 1 ,
The structural column abutting member is made of a plate material having a V-shaped cross-section that abuts on the protruding corner of the structural column,
A position adjusting device, wherein the pressing device contact plate is arranged orthogonally to a diagonal line in the rectangular cross section of the structural column. A method for adjusting the position of a structural column, which is inserted into an underground hole and has a rectangular cross section, using the position adjusting device according to any one of claims 1 to 4. There is
Suspending the structural column, to which the position adjusting device is attached on the lower end side of the outer surface, to a predetermined depth of the underground hole,
A method for adjusting the position of a structural column, wherein an external force is applied from the side to the lower end of the structural column via the pressing device provided in the position adjusting device to adjust the position of the structural column. .

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