JP2020193553A - Head joint structure and joint method for pile columnar bodies - Google Patents

Abstract

To provide a head joint structure and join method for pile columnar bodies that can avoid interference between main reinforcements and reinforcing bars for a concrete structure and that can resist a bending moment for pile heads.SOLUTION: The head joint structure for pile columnar bodies includes a reinforcing bar connection plate 12 that is arranged below a concrete structure 6 and supported on a head of a pile columnar body. Horizontal reinforcing bars 14, 14 that are embedded in the concrete structure 6 are attached on the reinforcing bar connection plate 12, and the reinforcing bar connection plate 12 includes reinforcing bar through holes 12b, 12b into which reinforcing bars 8, 8 are inserted. Because of this, it is possible to secure high bending strength and avoid interference between the reinforcing bars and the horizontal reinforcing bars.SELECTED DRAWING: Figure 2

Description

The present invention relates to a head joining structure and a joining method of a pile columnar body for joining a concrete structure such as a superstructure such as a pier or a footing and a pile columnar body such as a steel pipe pile.

Conventionally, when joining a concrete structure such as footing and a pile column such as a steel pipe pile, the head of the pile column is embedded in the concrete structure by a certain length, and the embedded portion resists the pile head bending moment. Method (hereinafter referred to as method A) and the depth of embedding of the pile head in the concrete structure are kept to a minimum, and vertical reinforcing reinforcing bars are placed in the circumferential direction of the pile head across the pile head and the concrete body. A method of arranging the piles at intervals and resisting the pile head bending moment by reinforcing reinforcing bars (hereinafter referred to as method B) is known (see, for example, Patent Document 1).

The method A has a problem that it is necessary to arrange sufficient reinforcing reinforcing bars because the main reinforcing bars arranged in the lower part of the concrete structure such as footing are structurally divided, and the arrangement becomes complicated.

On the other hand, the method B generally has a lower degree of rigidity than the method A, but has an advantage that the arrangement can be simplified because the main bars arranged under the concrete structure such as footing are not divided by the pile columnar body. There is.

In addition, Method B is expected to be applied to this field because there are few examples of application to pile head joining or precast members in pile supporting structures such as piers.

Japanese Unexamined Patent Publication No. 2006-83609

However, in the conventional technique according to the method B, since the vertical reinforcing bars are arranged at intervals in the circumferential direction of the pile head, the reinforcing bars are arranged in a grid pattern under the concrete structure such as footing or pier superstructure. There is a risk of interference with the arranged main bars, and in order to avoid this, it was necessary to take measures such as providing a member to support the reinforcing bars on the outer peripheral surface of the pile head of the pile column.

Further, when the concrete structure to be joined to the pile column is a precast member, it is difficult to fit the main bar and the reinforcing reinforcing bar of the concrete structure. Therefore, the sheath pipe is attached to the concrete structure by using the conventional method A. In many cases, it was installed, the head of the pile was inserted into the sheath pipe, and concrete was placed in the sheath pipe to join it to the pile column.

However, since the main reinforcement of the concrete structure is divided by the sheath pipe, the number of reinforcing bars required to secure the strength increases, and the outer diameter of the pile column must be increased accordingly. there were.

Therefore, in view of such conventional problems, the present invention can avoid interference between the main reinforcing bars of the concrete structure such as footing and superstructure of the pier and the reinforcing reinforcing bars, and can resist the pile head bending moment. This is for the purpose of providing a pile head joining structure and a joining method for a pile columnar body that can be formed.

The feature of the invention according to claim 1 for solving the conventional problem as described above is the concrete structure in the head joint structure of the pile column body in which the concrete structure is joined to the head of the pile column body. A reinforcing bar connecting plate arranged at the lower part of the body and supported by the head of the pile columnar body is provided, and horizontal reinforcing bars embedded in the concrete structure are fixed to the reinforcing bar connecting plate, and the concrete structure is fixed. It is provided with a through hole for reinforcing reinforcing bars through which reinforcing reinforcing bars arranged so as to straddle the body and the pile columnar body are penetrated.

The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the pile columnar body is provided with a height adjusting member at the pile head, and the reinforcing bar connecting plate is provided via the height adjusting member. It is supported by the head of the pile column.

The feature of the invention according to claim 3 is that, in addition to the configuration of claim 1 or 2, the concrete structure is a precast concrete member, and the reinforcing bar connecting plate is a vertical hole formed in the precast concrete member. It is located at the bottom of.

The feature of the invention according to claim 4 is that, in addition to the configuration of any one of claims 1 to 3, a reinforcing bar support plate is provided above the reinforcing bar connecting plate at intervals, and the reinforcing bar support plate has the concrete structure. The horizontal reinforcing bars embedded in the body are fixed, and the reinforcing reinforcing bars are fixed.

A feature of the invention according to claim 5 is that, in addition to the configuration of claim 4, the reinforcing bar support plate is provided with a through hole for reinforcing reinforcing bars through which the reinforcing reinforcing bars are penetrated.

The feature of the invention according to claim 6 is that, in addition to the configuration of claim 4, the reinforcing bar support plate is formed with an opening for inserting a reinforcing bar group into which a reinforcing bar group composed of a plurality of reinforcing bars is inserted. A fixing plate whose outer edge is supported by the edge of the opening for inserting the reinforcing bar group is provided, the upper end portions of the plurality of reinforcing bars are supported by the fixing plate, and the plurality of reinforcing bars are supported via the fixing plate. The reinforcing bar is supported by the reinforcing bar support plate, and the reinforcing bar supported by the fixing plate is penetrated through the reinforcing bar through hole formed in the reinforcing bar connecting plate.

The feature of the invention according to claim 7 is that, in addition to the configuration of claim 6, the outside of the reinforcing bar group composed of a plurality of reinforcing bars whose upper end is supported by the fixing plate is restrained by an annular or spiral hoop bar. It is to be done.

The feature of the invention according to claim 8 is that, in addition to the configuration of any one of claims 4 to 6, a plurality of hoop reinforcement columns are provided between the reinforcing bar connecting plate and the reinforcing bar support plate, and the hoop reinforcement is provided. An annular or spiral hoop muscle is supported on the support column.

A feature of the invention according to claim 9 is that, in addition to the configuration of claim 8, a formwork material for forming a vertical hole is provided on the outside of the plurality of hoop muscle support columns.

The feature of the invention according to claim 10 is, in addition to the configuration of any one of claims 1 to 9, a guide hole that is detachably projected from the head of the pile columnar body and is opened in the reinforcing bar connecting plate. A guide member to be inserted is provided, and the through holes for reinforcing reinforcing bars are arranged outside the guide holes at intervals in the circumferential direction.

The feature of the invention according to claim 11 is that, in addition to the configuration of any one of claims 1 to 10, an annular cushioning member supported by the upper end of the pile columnar body and arranged under the reinforcing bar connecting plate is provided. The pile columnar body and the concrete structure are joined to each other via a concrete drawing portion formed inside the cushioning member.

A feature of the invention according to claim 12 is that in a method of joining a concrete structure to the head of a pile column, the concrete structure is arranged below the concrete structure and embedded in the concrete body. The reinforcing bar is provided with a reinforcing bar connecting plate on which the horizontal reinforcing bar is fixed, the reinforcing bar connecting plate is supported by the head of the pile column, and the reinforcing bar is passed through the through hole for the reinforcing bar formed in the reinforcing bar connecting plate in that state. It is to be arranged so as to straddle the upper and lower parts of the reinforcing bar connecting plate, and then concrete is cast to join the concrete structure to the head of the pile columnar body.

A feature of the invention according to claim 13 is that, in addition to the configuration of claim 12, the concrete structure is a precast concrete member, and the reinforcing bar connecting plate is placed in a lower portion of a vertical hole formed in the precast concrete member. The precast concrete member is supported by the head of the pile columnar body via the reinforcing bar connecting plate, and the reinforcing reinforcing bar is precast through the through hole for reinforcing reinforcing bar formed in the reinforcing bar connecting plate in that state. The present invention is to arrange the concrete member and the pile columnar body so as to straddle the pile columnar body, and then to cast concrete into the vertical hole to join the precast concrete member to the head of the pile columnar body.

The feature of the invention according to claim 14 is that, in addition to the configuration of claim 12 or 13, a height-adjusted height adjusting member is fixed to the head of the pile columnar body, and the height adjusting member is placed on the height adjusting member. The purpose is to support the reinforcing bar connecting plate.

The feature of the invention according to claim 15 is that, in addition to the configuration of claim 14, the height adjusting member is provided with a supporting convex portion for supporting the reinforcing bar connecting plate at a central portion, and is outside the supporting convex portion. The reinforcing bar connecting plate is supported by the supporting convex portion with the annular cushioning member fitted in the concrete, and then the concrete is cast to join the pile columnar body and the concrete structure. A drawing portion smaller than the diameter of the pile column is formed inside the cushioning member, and the pile column and the concrete structure are joined via the drawing portion.

The feature of the invention according to claim 16 is that, in addition to the configuration of any one of claims 12 to 15, a guide hole opened in the reinforcing bar connecting plate in a guide member projecting from the head of the pile columnar body. The reinforcing bar connecting plate is guided to the guide member to guide the concrete structure to the installation position, the pile columnar body supports the reinforcing bar connecting plate, and the reinforcing bar connecting plate is spaced outside the guide hole in the circumferential direction. The purpose is to insert the reinforcing bar into the through hole for the reinforcing bar arranged at the same time.

The feature of the invention according to claim 17 is that, in addition to the configuration of any one of claims 12 to 16, a reinforcing bar support plate is provided above the reinforcing bar connecting plate at intervals, and the reinforcing bar support plate is provided with the reinforcing bar support plate. The purpose is to fix the horizontal reinforcing bars embedded in the concrete structure and to fix the reinforcing bars.

The feature of the invention according to claim 18 is that, in addition to the configuration of claim 17, the upper end portions of a plurality of reinforcing bars are supported by a fixing plate, and the head of the pile columnar body is interposed via the reinforcing bar connecting plate. After supporting the precast concrete member, a plurality of reinforcing bars supported by the fixing plate are inserted through an opening for inserting a reinforcing bar group formed in the reinforcing bar support plate, and the reinforcing bar connecting plate is formed. It penetrates through the through hole for the reinforcing bar, the outer edge of the fixing plate is supported by the edge of the opening for inserting the reinforcing bar group, and the upper end of each reinforcing bar is supported by the reinforcing bar support plate via the fixing plate. It is in.

The feature of the invention according to claim 19 is that, in addition to the configuration of claim 18, the outside of a reinforcing bar group composed of a plurality of reinforcing bars whose upper end is supported by the fixing plate is restrained by an annular or spiral hoop bar. It is to keep.

The feature of the invention according to claim 20 is that, in addition to the configuration of claim 17 or 18, a plurality of hoop muscle support columns are provided between the reinforcing bar connecting plate and the reinforcing bar support plate, and the hoop muscle support columns are provided. To support the annular or spiral hoop muscles

The pile head joint structure of the pile columnar body according to the present invention has the structure according to claim 1, and is arranged in the lower part of the concrete structure in a structure that resists bending moment by reinforcing bars. And interference with the reinforcing bars can be avoided.

Further, in the present invention, the joint height can be easily adjusted by providing the configuration according to claim 2.

Further, in the present invention, by providing the configuration according to claim 3, the structure that resists the bending moment by the reinforcing reinforcing bar can be suitably applied to the precast concrete member.

Furthermore, in the present invention, by providing the configuration according to claim 4, it is possible to avoid interference between the reinforcing bar and the horizontal reinforcing bar arranged on the upper part of the concrete structure, and to fix the reinforcing bar. It can be done easily.

Further, in the present invention, by providing the configuration according to claim 5, the head of the reinforcing bar can be fixed to the reinforcing bar support plate in accordance with the position of the through hole for the reinforcing bar of the reinforcing bar connecting plate.

Further, in the present invention, the reinforcing reinforcing bars can be collectively installed by providing the configuration according to claim 6.

Further, in the present invention, by providing the configuration according to claim 7, a plurality of reinforcing reinforcing bars can be positioned, and hoop reinforcing bars can be installed together with the reinforcing reinforcing bars.

Further, in the present invention, by providing the configuration according to claim 8, it is possible to omit the work of installing the hoop muscle in the field, reduce the work in a narrow place, and perform the work efficiently. Can be done.

Further, in the present invention, by providing the configuration according to claim 9, a vertical hole can be formed in a state where the hoop bar and the concrete structure are isolated.

Further, in the present invention, by providing the configuration according to claim 10, the pile columnar body and the concrete structure can be easily positioned via the reinforcing bar connecting plate, and each reinforcing reinforcing bar for the pile columnar body can be easily positioned. Can be installed in a concentric arrangement.

Further, in the present invention, by providing the configuration according to claim 11, the bending moment acting on the pile head due to an earthquake or the like can be reduced, and the pile columnar body and the concrete structure can be rationalized. It can be carried out.

The pile head joining method for a pile columnar body according to the present invention interferes with a reinforcing reinforcing bar with a main reinforcing bar (horizontal reinforcing bar) arranged under a concrete structure by providing the configuration according to claim 12. It can be installed efficiently without doing anything.

Further, in the present invention, the concrete structure can be efficiently constructed by providing the configuration according to claim 13.

Further, in the present invention, the height of the pile head of each pile can be easily adjusted by providing the configuration according to claim 14.

Further, in the present invention, by providing the configuration according to claim 15, the concrete structure and the pile columnar body are semi-rigidly joined to reduce the bending moment generated at the pile head due to an earthquake or the like, and the pile columnar body. Since the concrete structure can be rationalized, the pile head can be constructed efficiently.
It is possible to reduce stress and prevent damage to the pile column.

Furthermore, in the present invention, by providing the configuration according to claim 16, the concrete structure can be guided to a predetermined position via the reinforcing bar connecting plate, and each reinforcing reinforcing bar is provided with respect to the pile columnar body. Can be installed in a concentric arrangement.

Furthermore, in the present invention, by providing the configuration according to claim 17, interference between the horizontal reinforcing bars arranged on the upper part of the concrete structure and the reinforcing bars can be avoided, and the reinforcing bars can be efficiently arranged. , Reinforcing bars can be easily fixed.

Further, in the present invention, the reinforcing reinforcing bars can be collectively installed by providing the configuration according to claim 18.

Further, in the present invention, by providing the configuration according to claim 19, a plurality of reinforcing reinforcing bars can be positioned, and hoop reinforcing bars can be installed together with the reinforcing reinforcing bars.

Further, in the present invention, by providing the configuration according to claim 20, it is possible to omit the work of installing the hoop muscle in the field, and the work in a narrow place is reduced, so that the work can be performed efficiently. Can be done.

It is a front view which shows an example which used the head joint structure of the pile column body which concerns on this invention. It is a vertical cross-sectional view which shows the joint state of the pile head of the pile column body in FIG. It is a perspective view which shows the reinforcing bar connecting plate in FIG. It is a figure which shows the procedure of the pile head joining method of the pile column body which concerns on this invention, (a) is a plan view which shows the state of the pile column body assembly work, (b) is the same vertical sectional view. (A) is a plan view showing the state of the precast concrete member as above, and (b) is a vertical sectional view of the same. It is the bottom view of the same as above. It is a perspective view which shows the state of the work of installing the concrete structure in the pile column body of the same above. (A) is a plan view showing a state in which a concrete structure is installed on the same pile columnar body, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state of installation work of the reinforcing reinforcing bar of the same as above, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state at the time of placing concrete in the pile head of the same as above, and (b) is a vertical sectional view of the same. It is a figure which shows another example of the head joint structure of the pile column body which concerns on this invention, (a) is a plan view of the state before concrete placing, (b) is the same vertical sectional view. It is a figure which shows another example of the head joint structure of the pile column body which concerns on this invention, (a) is the plan view which shows the concrete structure, (b) is the same vertical sectional view. It is a perspective view which shows the structure which supports the hoop muscle in FIG. (A) is a plan view of the state before concrete placing using the same concrete structure, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state at the time of placing concrete in the pile head of the same as above, and (b) is a vertical sectional view of the same. It is an exploded perspective view which shows another example of the structure which supports a reinforcing bar. It is sectional drawing which shows the state of the work of installing the reinforcing bar when using the same structure. (A) is a plan view showing a state in which the reinforcing reinforcing bars of the above are installed, and (b) is a sectional view of the same. (A) is a plan view showing a state at the time of placing concrete in the pile head of the same as above, and (b) is a vertical sectional view of the same. It is a vertical cross-sectional view which shows still another example of the head joint structure of the pile column body which concerns on this invention. It is a figure which shows the procedure of the pile head joining method of the pile column of the same above, (a) is a plan view which shows the state of the pile column assembly work, (b) is the same vertical sectional view. (A) is a plan view showing a state in which a concrete structure is installed on the same pile columnar body, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state of installation work of the reinforcing reinforcing bar of the same as above, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state at the time of placing concrete in the pile head of the same as above, and (b) is a vertical sectional view of the same. It is a vertical cross-sectional view which shows still another example of the head joint structure of the pile column body which concerns on this invention. It is a figure which shows the procedure of the head joining method of the pile column of the same above, and is the vertical sectional view which shows the state which the pile column is placed. (A) is a plan view showing a state in which the same reinforcing bar connecting plate is installed, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state of the arrangement work of the reinforcing bars of the same as above, and (b) is a vertical sectional view of the same. (A) is a plan view showing a state of the horizontal reinforcing bar arrangement work of the same as above, and (b) is a vertical sectional view of the same.

Next, an embodiment of the head joint structure of the pile columnar body according to the present invention will be described based on the examples shown in FIGS. 1 to 10.

In this embodiment, a pile support structure such as a pier will be described as an example, and reference numeral 1 in the drawing is a pile support structure.

As shown in FIG. 1, the pile support structure 1 includes a pile columnar body 3 such as a plurality of steel pipe piles cast on the submerged ground 2 and a reinforced concrete beam portion 4 supported by the pile columnar body 3. A floor slab portion 5 is formed on the beam portion 4, and the beam portion 4 and the floor slab portion 5 form a superstructure of the pier.

Further, as shown in FIG. 2, the pile support structure 1 has vertical reinforcing bars 8, 8 ... Straddling the vertical holes 7 formed in the concrete structure 6 made of precast concrete members and the pile heads. The pile columnar body 3 and the concrete structure 6 are joined by placing concrete 9 in the vertical hole 7 and the pile head at intervals in the circumferential direction of the pile head.

The pile columnar body 3 is a steel pipe pile, a PHC pile, a cast-in-place concrete pile, or the like (steel pipe pile in this embodiment), and is formed in a vertically oriented hollow cylinder shape.

The pile column 3 is provided with a bottom formwork 10 for placing concrete at a predetermined depth from the upper end.

Further, the pile columnar body 3 is provided with a height adjusting member 11 at the pile head, and a reinforcing bar connecting plate 12 described later is supported via the height adjusting member 11.

As shown in FIG. 4, the height adjusting member 11 has a shape obtained by intersecting strip-shaped steel plates 11a and 11a with the short side direction facing up and down, and is formed in a cross shape in this embodiment while adjusting the height. It is inserted into the pile head and fixed to the upper end of the pile column 3 by welding or the like. The aspect of the height adjusting member 11 is not limited to this embodiment, and any shape may be used as long as the height can be adjusted.

Further, triangular mounting plates 11b, 11b ... Are fixed to the upper ends of the height adjusting member 11 so as to straddle the upper surfaces of the adjacent steel plates 11a, 11a, and are inserted into the guide holes 12a opened in the reinforcing bar connecting plate 12. The guide member 13 is detachably attached.

The beam portion 4 is composed of a concrete structure 6 made of a precast concrete member joined to the pile column 3, and the concrete structure 6 is formed with a vertical hole 7 to be joined to the pile column 3.

In the lower part of the vertical hole 7, a reinforcing bar connecting plate 12 arranged in the lower part of the concrete structure 6 and supported by the head of the pile column 3 is provided, and the reinforcing bar connecting plate 12 is provided on the lower side of the concrete structure 6. The ends of the horizontal reinforcing bars 14, 14 ... Embedded in the portion are fixed by welding or the like.

As shown in FIG. 3, the reinforcing bar connecting plate 12 is made of a steel plate or the like, a guide hole 12a is formed in the center, and a plurality of through holes 12b, 12b ... For reinforcing bars are formed outside the guide hole 12a in the circumferential direction. It is formed at intervals.

The through holes 12b, 12b ... For each reinforcing bar are positions corresponding to the arrangement of the reinforcing bars 8 determined based on the pile diameter of the pile column 3, and the pile column 3 is located from the center of the reinforcing bar connecting plate 12. It is formed at a position closer to the inner radius of the pile head at intervals in the circumferential direction of the pile head.

The through holes 12b, 12b ... For each of the reinforcing bars have a diameter through which the rod-shaped reinforcing bars 8, 8 ... Can penetrate, and the reinforcing bars 8, 8 ... Penetrate the through holes 12b, 12b ... For the reinforcing bars. It is fixed to the reinforcing bar connecting plate 12 in an arrangement straddling the inside of the vertical hole 7 and the inside of the pile columnar body 3.

The guide holes 12a are formed so as not to interfere with the through holes 12b and 12b for the reinforcing reinforcing bars, and are fitted to the guide members 13 so that the reinforcing bar connecting plate 12 is guided to the guide members 13 and the concrete structure 6 is installed. It is designed to be guided to the position.

As shown in FIG. 4, the guide member 13 includes a rectangular flange portion 13a and guide plates 13b and 13b made of steel plates fixed to the upper surface of the flange portion 13a, and the guide plate 13b is provided on the upper surface of the flange portion 13a. 13b are arranged in a cross shape.

The width of each of the guide plates 13b and 13b is substantially the same as or slightly narrower than the inner diameter of the guide hole 12a, and the upper portion thereof is formed in a thin taper shape on the tip side.

A bolt insertion hole is formed in the flange portion 13a, and the guide member 13 can be detachably fixed to the mounting plates 11b, 11b ... Fixed to the upper end of the height adjusting member 11 by bolting. There is.

Next, a method of joining the pile heads of the pile columnar body will be described.

As a preliminary preparation, a concrete structure 6 made of the precast concrete members shown in FIGS. 5 and 6 is manufactured in a manufacturing yard or the like near the factory or the construction site.

Although not particularly shown, the concrete structure 6 is manufactured by arranging the reinforcing bar connecting plate 12 at the bottom of the formwork and placing horizontal reinforcing bars 14, 14 ... And horizontal reinforcing bars 17, 17 ... On the upper and lower sides of the formwork, respectively. Arrange and fix the ends of the lower horizontal reinforcing bars 14, 14 ... To the reinforcing bar connecting plate 12 by welding or the like.

Then, concrete is cast in the formwork to form a concrete structure 6 made of a precast concrete member in which the reinforcing bar connecting plate 12 is arranged at the bottom of the vertical hole 7.

On the other hand, at the construction site, first, as shown in FIG. 4, a pile column 3 made of steel pipe piles is driven into the bottom ground 2, and the pile head bottom formwork 10 is placed at a predetermined depth in the pile column 3. To install.

Next, the installation height of the pile column 3 is measured, the height adjusting member 11 is fixed while adjusting the height according to the height, and the mounting plate 11b fixed on the height adjusting member 11 is used. The guide member 13 is fixed.

Further, a bottom formwork member 15 that closes the lower side of the vertical hole 7 of the concrete structure 6 is fixed to the outer peripheral surface of the pile columnar body 3.

Next, as shown in FIG. 7, the concrete structure 6 is moved above the pile columnar body 3, the guide hole 12a is fitted into the guide member 13, and the reinforcing bar connecting plate 12 is guided to the guide member 13 to guide the concrete structure. The body 6 is guided to the installation position, the reinforcing bar connecting plate 12 is supported by the pile column 3, and the concrete structure 6 is temporarily supported by the pile column 3.

At that time, by guiding the reinforcing bar connecting plate 12 through the guide hole 12a through the guide member 13, the positions of the pile columnar body 3 and the concrete structure 6 can be easily aligned.

Further, by supporting the concrete structure 6 on the pile columnar body 3, the lower opening of the vertical hole 7 is closed by the bottom formwork member 15.

Then, when the concrete structure 6 is temporarily supported by the pile column 3 and stabilized, the guide member 13 and the mounting plates 11b, 11b ... Are removed and removed. The mounting plates 11b and 11b may not be removed if they do not interfere with the concrete placement.

Next, as shown in FIG. 9, the vertical reinforcing bars 8, 8 ... Are passed through the through holes 12b, 12b ... For the reinforcing bars, and the reinforcing bars 8, 8 ... Are inserted into the reinforcing bar connecting plate 12 at a predetermined position. In addition to fixing, hoop bars 16, 16 ... Are arranged on the outside of the reinforcing bars 8, 8 ... at intervals at the top and bottom, and are fixed by a binding wire.

At that time, since the pile column 3 and the reinforcing bar connecting plate 12 are accurately aligned by the guide member 13, the reinforcing bars 8 and 8 to be penetrated through the reinforcing bar through holes 12b, 12b ... Of the reinforcing bar connecting plate 12 The position of ... is also automatically positioned and can be easily installed.

Then, the concrete 9 is cast into the gap between the reinforcing bar connecting plate 12 and the bottom formwork member 15 and the pile column 3 through the guide hole 12a from the upper surface of the vertical hole 7 (primary casting).

After that, the filling state of the concrete placed in the primary position was confirmed, and as shown in FIG. 10, the relay reinforcing bars 18 were connected between the horizontal reinforcing bars 17 and 17 arranged above the concrete structure 6 by a mechanical joint or the like. By pouring cast-in-place concrete 9 into the vertical hole 7 (secondary casting) and curing and solidifying it, the concrete structure 6 made of a precast concrete member is joined to the upper end of the pile columnar body 3.

If the filling status of concrete by the primary casting can be confirmed, the primary casting and the secondary casting may be continuously performed.

In the head joining structure and joining method of the pile column 3 configured in this way, the horizontal reinforcing bars 14, 14 ... Arranged in the lower part of the concrete structure 6 have a continuous structure via the reinforcing bar connecting plate 12. , Horizontal reinforcing bars 14, 14 ... Can be preferably arranged, and there is no need to worry about interference with reinforcing reinforcing bars 8, 8 ...

Further, when the concrete structure 6 is supported by the pile column 3, the guide member 13 is guided by the guide hole 12a formed in the reinforcing bar connecting plate 12, so that the concrete structure 6 is positioned with respect to the pile column 3. It can be easily performed, and the positioning of the reinforcing bars 8, 8 ... Can be automatically performed.

As shown in FIG. 11, the concrete structure 6 made of a precast concrete member is provided with reinforcing bar support plates 20 at intervals above the reinforcing bar connecting plate 12, and the reinforcing bars 8, 8 ... The head may be fixed. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

The reinforcing bar support plate 20 is formed in the same manner as the reinforcing bar connecting plate 12 shown in FIG. 3, is made of a steel plate or the like, has a working hole 20a formed in the center, and is used for a plurality of reinforcing reinforcing bars outside the working hole 20a. Through holes 20b, 20b ... Are formed at intervals in the circumferential direction.

Each of the reinforcing bars 8, 8 ... Has a screw portion at the upper end and hangs down through the reinforcing bar through holes 12b, 12b ... Of the reinforcing bar support plate 20, and the reinforcing bar through holes 20b, 20b ... Of the reinforcing bar connecting plate 12 are provided. By tightening the nut 21 to the screw portion at the upper end in the penetrating state, the nut 21 is fixed to the reinforcing bar support plate 20.

Further, the ends of the horizontal reinforcing bars 17, 17 ... Embedded in the upper part of the concrete structure 6 are fixed to the reinforcing bar support plate 20 by welding, and the horizontal reinforcing bars 17, 17 are continuous via the reinforcing bar support plate 20. Are connected.

Further, as shown in FIG. 12, the concrete structure 6 is provided with a plurality of hoop reinforcement support columns 50, 50 ... Between the reinforcing bar connecting plate 12 and the reinforcement support plate 20, and the hoop reinforcement support columns 50, 50 ... The annular or spiral hoop muscles 16, 16 may be supported. The same configurations as those in the above-described embodiment will be described with the same reference numerals.

On the outside of the hoop muscle support columns 50, 50, a tubular formwork 51 for forming a vertical hole 7 at the time of forming the concrete structure 6 is arranged.

The formwork member 51 plays a role of separating the concrete from the hoop muscle support columns 50 and 50 and the hoop reinforcements 16 and 16 at the time of forming the concrete structure 6, and the hoop reinforcement support columns 50 and 50 are used. With the installation, it is left as it is in the vertical hole 7.

As shown in FIG. 13, the hoop reinforcement support columns 50, 50 ... Are circumferentially outward to the reinforcing bar through holes 12b, 12b ... Of the reinforcing bar connecting plate 12 and the reinforcing bar through holes 20b, 20b of the reinforcing bar support plate 20. The ends are fixed to the reinforcing bar connecting plate 12 and the reinforcing bar support plate 20 by welding or the like, respectively.

The inner diameters of the hoop bars 16 and 16 are set to be arranged outside the through holes 12b and 20b for the reinforcing reinforcing bars, and are fixed to the hoop bar support columns 50, 50 ... By a binding wire or the like.

Then, by inserting the reinforcing bars 8, 8 ... Into the through holes 12b, 20b for the reinforcing bars, the reinforcing bars 8, 8 ... Are inserted inside the hoop bars 16, 16 as shown in FIG. It has become.

Each of the reinforcing bars 8, 8 ... Has a screw portion at the upper end and hangs down through the reinforcing bar through holes 20b, 20b ... Of the reinforcing bar support plate 20, and the reinforcing bar through holes 12b, 12b ... Of the reinforcing bar connecting plate 12 are provided. By tightening the nut 21 to the screw portion at the upper end in the penetrating state, the nut 21 is fixed to the reinforcing bar support plate 20.

The inserted reinforcing reinforcing bars 8, 8 ... Are fixed to the hoop reinforcing bars 16, 16 by a binding wire or the like, with a worker entering the vertical holes 7.

Then, as in the above-described embodiment, concrete is formed in the gap and the pile column 3 sandwiched between the reinforcing bar connecting plate 12 and the bottom formwork member 15 through the work hole 20a and the guide hole 12a from the upper surface of the vertical hole 7. Place 9 (primary placement).

After that, the filling state of the primary cast concrete was confirmed, and as shown in FIG. 15, the cast-in-place concrete 9 was put into the vertical hole 7 (secondary cast) and cured and solidified to form the pile column 3 A concrete structure 6 made of a precast concrete member is joined to the upper end portion of the concrete structure.

Further, in the above-described embodiment, an example in which the upper end portion of each of the reinforcing bars 8, 8 ... Is fixed to the reinforcing bar support plate 20 has been described, but as shown in FIGS. 16 to 18, each of the reinforcing bars supporting plates 20 has its upper end. The through holes 20b for the reinforcing bars are not provided, the upper ends of the plurality of reinforcing bars 8, 8 ... Are supported by the fixing plate 52, and the outer edge of the fixing plate 52 is supported by the edge of the reinforcing bar group insertion opening 53. , The upper end portions of the reinforcing reinforcing bars 8, 8 ... May be supported by the reinforcing bar support plate 20. The same reference numerals are given to the same configurations as those in the above-described embodiment, and the description thereof will be omitted.

In this case, it is desirable to restrain the outside of the reinforcing bar group 8A composed of a plurality of reinforcing bars 8, 8 ... whose upper end is supported by the fixing plate 52 with an annular or spiral hoop bar 54.

The reinforcing bar group insertion opening 53 formed in the reinforcing bar support plate 20 is formed in a circular hole shape penetrating the reinforcing bar support plate 20 in the plate thickness direction, and is the reinforcing bar group 8A composed of a plurality of reinforcing bars 8, 8 ... The hoop muscle 54 that restrains the outside has a size that allows it to be inserted.

The fixing plate 52 is formed in an annular shape having a work hole 52a in the central portion, and a plurality of fixing plates 52 are arranged in the same arrangement as the reinforcing bar through holes 12b and 12b formed in the reinforcing bar connecting plate 12 on the outside of the work hole 52a. It has through holes 52b, 52b ... For reinforcing reinforcing bars.

The outer diameter of the fixing plate 52 is larger than the inner diameter of the reinforcing bar group insertion opening 53, and the outer edge thereof is the edge of the reinforcing bar group insertion opening 53, that is, the reinforcing bar support outside the reinforcing bar group insertion opening 53. It is supported on the upper surface of the plate 20.

Then, the reinforcing reinforcing bars 8, 8 ... Are hung through the reinforcing reinforcing bar through holes 52b, 52b ... Of the fixing plate 52, and are fixed to the fixing plate 52 by tightening the nut 21 at the upper end thereof. ..

The shape of the fixing plate 52 is not limited to a circular shape, and a plurality of or all of the outer edge portions are supported on the upper surface of the edge portion of the reinforcing bar group insertion opening 53 and cannot be removed from the reinforcing bar group insertion opening 53. Anything is fine.

As shown in FIG. 17, the head joining method of the pile columnar body configured in this manner is to support the precast concrete structure 6 on the head of the pile columnar body 3 via the reinforcing bar connecting plate 12 and then fix the pile columnar body. A reinforcing bar group 8A, which is supported by the plate 52 and whose outer periphery is restrained by the hoop bars 54, is lowered from above the vertical hole 7 and inserted into the reinforcing bar group insertion opening 53.

Then, when the reinforcing bar group 8A is lowered to a predetermined position, the reinforcing reinforcing bars 8, 8 ... Supported by the fixing plate 52 are penetrated through the reinforcing bar through holes 12b, 12b ... Formed in the reinforcing bar connecting plate 12. ..

At that time, since the reinforcing bars 8, 8 ... Are supported by the fixing plate 52, the positions of the reinforcing bars 8, 8 ... Are automatically positioned as the positions of the reinforcing bar through holes 12b, 12b ... Of the reinforcing bar connecting plate 12. It is designed to be inserted according to.

Then, when the reinforcing bar group 8A is further lowered, as shown in FIG. 18, the outer edge of the fixing plate 52 is supported by the edge portion of the reinforcing bar group insertion opening 53, and the upper ends of the reinforcing reinforcing bars 8, 8 ... Are fixed. It is supported by the reinforcing bar support plate 20 via the plate 52.

As a result, the reinforcing reinforcing bars 8, 8 ... And the hoop reinforcing bars 54 are installed at predetermined positions in the vertical hole 7.

Then, as in the above-described embodiment, the concrete is formed in the gap and the pile column 3 sandwiched between the reinforcing bar connecting plate 12 and the bottom formwork member 15 through the work hole 52a and the guide hole 12a from the upper surface of the vertical hole 7. Place 9 (primary placement).

After that, the filling state of the primary cast concrete was confirmed, and as shown in FIG. 19, the cast-in-place concrete 9 was put into the vertical hole 7 (secondary cast) and cured and solidified to form the pile column 3 A concrete structure 6 made of a precast concrete member is joined to the upper end portion of the concrete structure.

Next, another embodiment of the head joint structure of the pile columnar body according to the present invention will be described with reference to FIGS. 20 to 24. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 20, the head joint structure of the pile columnar body includes an annular cushioning member 60 supported at the upper end of the pile columnar body 3 and arranged under the reinforcing bar connecting plate 12, and is inside the cushioning member 60. The pile columnar body 3 and the concrete structure 6 are joined to each other via a drawing portion 61 formed in.

The head joint structure of the pile column 3 uses a height adjusting member 63 provided with a supporting convex portion 62 for supporting the reinforcing bar connecting plate 12, and an annular cushioning member 60 outside the supporting convex portion 62. Perform the joining work with the above fitted.

As shown in FIG. 21, the height adjusting member 63 is composed of convex steel plates 64, 64 having a convex portion 64a in the center of the upper end portion, and has a shape in which the steel plates 64, 64 are crossed, and is a flat surface in this embodiment. A cross-shaped supporting convex portion 62 is formed in which the convex portions 64a intersect with each other and project upward from the surroundings.

Then, the height adjusting member 63 is inserted into the pile head while adjusting the height, and the steel plates 64 and 64 are fixed to the upper end of the pile column 3 by welding or the like.

Further, the height adjusting member 63 is formed with a cushioning material fitting portion in which the annular cushioning member 60 is fitted by the concave portion at the upper end of the steel plate around the supporting convex portion 62.

The cushioning member 60 is made of a low-resilience material such as a styrofoam material, a urethane foam material, and a rubber sponge material, and is formed in an annular shape having an opening that fits with a supporting convex portion 62 in the center.

Further, the cushioning member 60 is formed to have a thickness equal to or thicker than the height of the supporting convex portion 62, and the upper surface of the cushioning member 60 is a reinforcing bar connecting plate with the supporting convex portion 62 supporting the reinforcing bar connecting plate 12. It is designed to come into contact with 12.

At the upper end of the supporting convex portion 62 of the height adjusting member 63, triangular mounting plates 65, 65 ... Are fixed across the upper surfaces of the adjacent convex portions 64a, and a guide opened in the reinforcing bar connecting plate 12. The guide member 13 to be inserted into the hole 12a is detachably attached.

In order to join the concrete structure 6 and the pile column 3 as shown in FIG. 22, the concrete structure 6 is moved above the pile column 3, the guide hole 12a is fitted into the guide member 13, and the reinforcing bar is reinforced. The connecting plate 12 is guided by the guide member 13 to guide the concrete structure 6 to the installation position, the reinforcing bar connecting plate 12 is supported by the pile column 3 via the height adjusting member 63, and the concrete structure 6 is supported by the pile column. Temporarily support the body 3.

At that time, by guiding the reinforcing bar connecting plate 12 through the guide hole 12a through the guide member 13, the positions of the pile columnar body 3 and the concrete structure 6 can be easily aligned.

Further, by supporting the reinforcing bar connecting plate 12 on the supporting convex portion 62, the cushioning member 60 is arranged in a state of being in contact with the reinforcing bar connecting plate 12.

Further, by supporting the concrete structure 6 on the pile columnar body 3, the lower opening of the vertical hole 7 is closed by the bottom formwork member 15.

Then, when the concrete structure 6 is temporarily supported by the pile column 3 and stabilized, the guide member 13 and the mounting plates 65 and 65 are removed and removed.

Next, as shown in FIG. 23, the vertical reinforcing bars 8, 8 ... Are passed through the through holes 12b, 12b ... For the reinforcing bars, and the reinforcing bars 8, 8 ... Are inserted into the reinforcing bar connecting plate 12 at a predetermined position. In addition to fixing, hoop bars 16, 16 ... Are arranged on the outside of the reinforcing bars 8, 8 ... at intervals at the top and bottom, and are fixed by a binding wire.

At that time, since the pile column 3 and the reinforcing bar connecting plate 12 are accurately aligned by the guide member 13, the reinforcing bars 8 and 8 to be penetrated through the reinforcing bar through holes 12b, 12b ... Of the reinforcing bar connecting plate 12 The position of ... is also automatically positioned and can be easily installed.

Then, as shown in FIG. 24, the concrete 66 is formed in the gap 67 and the pile column 3 sandwiched between the reinforcing bar connecting plate 12, the bottom formwork member 15, and the cushioning member 60 through the guide hole 12a from the upper surface of the vertical hole 7. (Primary placement).

In this primary casting, since the annular cushioning member 60 is arranged under the reinforcing bar connecting plate 12, the cushioning member 60 functions as a formwork and has a diameter larger than the diameter of the pile column 3 inside the cushioning member 60. A small drawing portion 61 is formed.

Then, after the primary cast concrete was cured and solidified, as shown in FIG. 20, a relay reinforcing bar 18 was connected between the horizontal reinforcing bars 17 and 17 arranged above the concrete structure 6 by a mechanical joint or the like. After that, cast-in-place concrete 9 is put into the vertical hole 7 (secondary casting) and cured and solidified, so that the concrete structure 6 made of a precast concrete member is formed at the upper end of the pile column 3 via a drawing portion 61. Are joined.

In the joint structure of the pile column 3 configured in this way, the concrete structure 6 and the pile column 3 are joined via a drawing portion 61 smaller than the diameter of the pile column 3, and the concrete structure 6 is formed. A cushioning member 60 is interposed between the pile column and the pile column 3.

Further, reinforcing reinforcing bars 8 and 8 are arranged so as to straddle between the concrete structure 6 and the pile columnar body 3.

Therefore, when the pile column 3 and the concrete structure 6 are semi-rigidly joined and stress is applied to the pile head due to an earthquake or the like, the pile column 3 swings in the horizontal direction or the rotational direction with respect to the concrete structure 6. It is possible to reduce the bending moment generated at the joint, and to make a rational design for the pile column 3 and the concrete structure 6.

Next, the head joining structure and the joining method of the pile columnar body according to the present invention will be described with reference to the examples shown in FIGS. 25 to 29.

In this embodiment, a case where a concrete structure 31 such as a footing made of cast-in-place concrete is joined to the head of a foundation pile which is a pile columnar body 30, reference numeral 30 in the drawing is a foundation pile, and reference numeral 31 is a footing. is there.

The footing 31 is provided with a reinforcing bar connecting plate 32 supported by the head of the pile columnar body 30 at its lower portion, and vertical reinforcing bars 33, 33 ... Are penetrated through the reinforcing bar connecting plate 32 at intervals in the circumferential direction. At the same time, the horizontal reinforcing bars 34, 34 ... Embedded in the concrete structure 31 are fixed, and the reinforcing bars 33, 33 ... Arranged across the pile head and the concrete structure 31 resist the pile head bending moment. It has a structure.

In order to join the pile column 30 and the concrete structure 31, first, as shown in FIG. 26, a pile column 30 such as a steel pipe pile is placed in the ground, and then the pile column 30 is formed. The upper end is projected from the ground surface, and the earth and sand in the pile column 30 is excavated to a predetermined depth.

In addition, crushed stone is laid on the ground surface to form a crushed stone layer 35, and leveling concrete 36 is cast on the crushed stone layer 35 to uniformly level the ground surface.

Next, as shown in FIG. 27, the height adjusting member 38 formed in the shape of a steel plate or a rod while measuring the protruding height of the pile columnar body 30 and adjusting the height according to the height. , 38 ... Are fixed to the upper end of the pile columnar body 30 protruding from the ground surface, and the reinforcing bar connecting plate 32 is placed on the upper surface of the pile columnar body 30 with the center of the pile columnar body 30 and the center of the guide hole 32a aligned. Fix by welding etc.

The height adjusting members 38 and 38 do not necessarily have to be used, and the reinforcing bar connecting plate 32 is directly placed on the pile column 30 according to the measurement result of the protruding height of the pile column 30, and the position thereof. It may be fixed by welding or the like.

Further, the height adjusting member 11 and the guide member 13 may be used for positioning the reinforcing bar connecting plate 32 with respect to the pile columnar body 30 as in the embodiment shown in FIGS. 1 to 10.

Next, as shown in FIG. 28, the vertical reinforcing bars 33, 33 ... Are passed through the through holes 32b, 32b ... For the reinforcing bars, and the reinforcing bars 33, 33 ... Are inserted into the reinforcing bar connecting plate 32 at predetermined positions. While fixing, hoop bars 39, 39 ... Are arranged on the outside of the strong reinforcing bar at intervals at the top and bottom, and fixed by a binding wire.

At that time, the positions of the reinforcing bars 33, 33 ... Penetrating the reinforcing bar through holes 32b, 32b ... Of the reinforcing bar connecting plate 32 are also automatically positioned and can be easily attached.

Then, when the installation of the reinforcing bars 33, 33 ... Is completed, the concrete (filled concrete) 40 is placed in the pile column 30 through the guide hole 32a. The filling concrete may be placed at the same time as the cast-in-place concrete constituting the concrete structure 31 described later.

Next, as shown in FIG. 29, the horizontal reinforcing bars 34, 34 ... Are arranged in the lower part of the concrete body 31, and the ends of the horizontal reinforcing bars 34, 34 ... Arranged in the lower part of the concrete structure 31 are welded to the reinforcing bars. It is fixed to the connecting plate 32.

Further, horizontal reinforcing bars 42, 42 ... Are arranged on the upper part of the concrete structure 31, and necessary reinforcing bars such as stirrups 43, 43 ... Are installed.

Then, after the arrangement of the horizontal reinforcing bars 34, 34, the horizontal reinforcing bars 42, 42 and the stirrups 43, 43 is completed, the formwork 41 is assembled and installed.

Then, as shown in FIG. 25, concrete is cast in the formwork 41 to form a concrete structure 31, and the pile columnar body 30 and the concrete structure 31 are joined by curing and solidifying the concrete. To.

1 Pile support structure 2 Underwater ground 3 Pile columnar body 4 Beam part 5 Floor slab part 6 Concrete structure 7 Vertical hole 8 Reinforcing bar 9 Concrete 10 Bottom form 11 Height adjusting member 12 Reinforcing bar connecting plate 13 Guide member 14 Horizontal reinforcing bar 15 Bottom form member 16 Hoop reinforcement 17 Horizontal reinforcement 18 Relay reinforcement 20 Reinforcing bar support plate 30 Pile columnar body 31 Concrete structure 32 Reinforcing bar connecting plate 33 Reinforcing reinforcement 34 Horizontal reinforcing bar 35 Crushed stone layer 36 Leveling concrete 38 Height adjusting member 39 Hoop Reinforcing bar 40 Concrete 41 Form 42 Horizontal reinforcing bar 43 Stirrup bar 50 Hoop reinforcement Support pillar 51 Form frame material 52 Fixing plate 53 Reinforcing bar group insertion opening 54 Hoop reinforcement 60 Cushioning member 61 Squeezing part 62 Supporting convex part 63 Height adjusting member 64 Steel plate 65 Mounting plate 66 Concrete 67 Void

Claims (20)

In the head joining structure of the pile column, which is formed by joining the concrete structure to the head of the pile column.
It is provided with a reinforcing bar connecting plate arranged at the bottom of the concrete structure and supported by the head of the pile column.
A through hole for reinforcing bars, in which horizontal reinforcing bars embedded in the concrete structure are fixed to the reinforcing bar connecting plate, and reinforcing bars arranged across the concrete structure and the pile columnar body are penetrated. A head joint structure of a pile columnar body characterized by being equipped with. The pile column according to claim 1, wherein the pile column has a height adjusting member on the pile head, and the reinforcing bar connecting plate is supported on the head of the pile column via the height adjusting member. Head joint structure of the body. The head of the pile columnar body according to claim 1 or 2, wherein the concrete structure is a precast concrete member, and the reinforcing bar connecting plate is arranged below a vertical hole formed in the precast concrete member. Joined structure. Claims 1 to 3 in which reinforcing bar support plates are provided above the reinforcing bar connecting plate at intervals, and horizontal reinforcing bars embedded in the concrete structure are fixed to the reinforcing bar support plates, and the reinforcing reinforcing bars are fixed. The head joint structure of the pile columnar body according to any one of. The head joint structure of a pile columnar body according to claim 4, wherein the reinforcing bar support plate is provided with a through hole for reinforcing reinforcing bars through which the reinforcing reinforcing bars are penetrated. The reinforcing bar support plate is formed with a reinforcing bar group insertion opening through which a reinforcing bar group composed of a plurality of reinforcing bars is inserted, and a fixing plate whose outer edge is supported by the edge of the reinforcing bar group insertion opening. Prepare,
The upper end portions of the plurality of reinforcing bars are supported by the fixing plate, the plurality of reinforcing bars are supported by the reinforcing bar support plate via the fixing plate, and the reinforcing bars supported by the fixing plate are supported by the fixing plate. The head joint structure of a pile columnar body according to claim 4, which is penetrated through the through hole for reinforcing reinforcing bars formed in the reinforcing bar connecting plate. The head joint structure of a pile columnar body according to claim 6, wherein the outer side of the reinforcing bar group composed of a plurality of reinforcing bars whose upper end is supported by the fixing plate is restrained by an annular or spiral hoop bar. According to any one of claims 4 to 6, a plurality of hoop muscle support columns are provided between the reinforcing bar connecting plate and the reinforcing bar support plate, and an annular or spiral hoop muscle is supported on the hoop muscle support columns. The head joint structure of the described pile column. The head joint structure of a pile columnar body according to claim 8, wherein a formwork material for forming a vertical hole is provided on the outside of the plurality of hoop muscle support columns. A guide member is provided that is detachably projected from the head of the pile columnar body and is inserted into a guide hole opened in the reinforcing bar connecting plate, and the through hole for reinforcing reinforcing bars is provided in the circumferential direction outside the guide hole. The head joint structure of a pile columnar body according to any one of claims 1 to 9, which is arranged at intervals. An annular cushioning member supported at the upper end of the pile columnar body and arranged under the reinforcing bar connecting plate is provided, and the pile columnar body and the concrete structure are formed via a drawing portion formed inside the cushioning member. The head joint structure of the pile columnar body according to any one of claims 1 to 10, wherein the pile columnar body is joined. In the method of joining the head of a pile column to join a concrete structure to the head of a pile column,
A reinforcing bar connecting plate arranged under the concrete structure and having horizontal reinforcing bars embedded in the concrete body fixed therein is provided.
The reinforcing bar connecting plate is supported on the head of the pile columnar body, and in that state, the reinforcing reinforcing bars are arranged over and above the reinforcing bar connecting plate through the through holes for the reinforcing bars formed in the reinforcing bar connecting plate. , A method for joining the head of a pile column, which comprises placing concrete and joining the concrete structure to the head of the pile column. The concrete structure is a precast concrete member, and the reinforcing bar connecting plate is arranged below a vertical hole formed in the precast concrete member, and the reinforcing bar connecting plate is interposed at the head of the pile columnar body. The precast concrete member is supported, and in that state, the reinforcing reinforcing bars are arranged across the precast concrete member and the pile columnar body through the through hole for the reinforcing reinforcing bar formed in the reinforcing bar connecting plate, and then the vertical The method for joining the head of a pile column according to claim 12, wherein concrete is poured into the hole and the precast concrete member is joined to the head of the pile column. The head joining of the pile columnar body according to claim 12 or 13, wherein a height adjusting member whose height is adjusted is fixed to the head of the pile columnar body, and the reinforcing bar connecting plate is supported on the height adjusting member. Method. The height adjusting member is provided with a supporting convex portion for supporting the reinforcing bar connecting plate in the central portion, and the supporting convex portion is fitted with an annular cushioning member on the outside of the supporting convex portion. The reinforcing bar connecting plate is supported, and then the concrete is cast to join the pile column and the concrete structure, and a drawing portion smaller than the diameter of the pile column is formed inside the cushioning member. The head joining method for a pile column according to claim 14, wherein the pile column and the concrete structure are joined via the throttle portion. A guide hole opened in the reinforcing bar connecting plate is fitted into a guide member detachably attached to the head of the pile column, and the reinforcing bar connecting plate is guided to the guide member to position the concrete structure at the installation position. Any of claims 12 to 15 for guiding, supporting the reinforcing bar connecting plate on the pile columnar body, and inserting the reinforcing bar into through holes for reinforcing bars arranged outside the guide hole at intervals in the circumferential direction. The method for joining the heads of pile columnar bodies according to Kaichi. Claims 12 to 16 in which reinforcing bar support plates are provided above the reinforcing bar connecting plate at intervals, and horizontal reinforcing bars embedded in the concrete structure are fixed to the reinforcing bar support plates, and the reinforcing reinforcing bars are fixed. The method for joining the head of a pile columnar body according to any one of the above. The upper ends of the plurality of reinforcing bars are supported by the fixing plate, the precast concrete member is supported by the head of the pile columnar body via the reinforcing bar connecting plate, and then the plurality of supported by the fixing plate. The reinforcing bar is inserted through the reinforcing bar group insertion opening formed in the reinforcing bar support plate, and is penetrated through the reinforcing bar through hole formed in the reinforcing bar connecting plate, and the outer edge of the fixing plate is inserted into the reinforcing bar group insertion. The head joining method for a pile columnar body according to claim 17, wherein the edge portion of the general opening is supported, and the upper end portion of each reinforcing reinforcing bar is supported by the reinforcing bar support plate via the fixing plate. The head joining method for a pile columnar body according to claim 18, wherein the outside of a reinforcing bar group composed of a plurality of reinforcing bars whose upper ends are supported by the fixing plate is restrained by an annular or spiral hoop bar. The 17 or 18 according to claim 17 or 18, wherein a plurality of hoop muscle support columns are provided between the reinforcing bar connecting plate and the reinforcing bar support plate, and the hoop muscle support columns support the annular or spiral hoop muscles. Head joining method for pile columns.

Images