JP2014066090A - Structure and method for coupling pieces of pipe material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure and method for coupling pieces of pipe material, which needs almost no on-site welding and reduces almost no outer space of pieces of pipe material such as steel pipes, and ensures transmission of compressive axial force between the pieces of pipe material and improves load resistant performance of axial force of a pole.SOLUTION: A structure for coupling pieces of pipe material couples vertically pieces of pipe material, which are used for forming a pole of a building. A plurality of pieces of insertion material is inserted in parallel between the pieces of pipe material, which are vertically adjacent to each other, the plurality of pieces of insertion material being in surface contact with the end faces of the pieces of pipe material. A cement composite is filled in the pieces of pipe material across at least a coupling position of the pieces of pipe material. The contact surface between at least one of the pieces of pipe material and the piece of insertion material is tapered from a horizontal direction. A movement of the piece of insertion material in an outer radial direction of the piece of pipe material is restricted by the tapered surface, while a movement of the piece of insertion material in an inner radial direction of the piece of pipe material is restricted by the cement composite filled in the pieces of pipe material.

Description

  The present invention relates to a connection structure and a connection method for connecting pipe members that are pillars of a structure such as a building in the vertical direction.

  Conventionally, for example, a steel pipe is used as a pipe material that becomes a pillar of a structure such as a building. And as a connection structure of the steel pipes which adjoin the up-down direction, welding joining and bolt joining are common, for example, patent document 1 discloses an example of welding joining.

JP 2002-242303 A

  Here, in the case of the former welding joining, in-situ welding is often performed, but high skill is required for such on-site welding, and quality control is difficult. In addition, the construction site is often outdoors and is easily affected by the weather, such as being canceled when it rains.

  In the latter case, splice plates, high-strength bolts, etc. are arranged outside the steel pipe. However, the space that can be used as indoor space after the completion of the building is reduced accordingly. In addition, the design is also deteriorated.

  On the other hand, as a connection structure that does not require field welding, as shown in the schematic longitudinal sectional view of FIG. 1A, the steel pipes 11u and 11d are filled with concrete 21 in the steel pipes 11u and 11d across the steel pipes 11u and 11d. It is possible to concatenate. Further, according to this connection structure, the splicing plate and the like necessary for bolt joining are not necessary, so that the problem of loss of usable space can be avoided.

  However, in this connection structure, as shown in the schematic longitudinal sectional view of FIG. 1B, there is a possibility that a gap G is generated between the steel pipes 11u and 11d. For example, in the case where the lower steel pipe 11d that should originally be erected in the vertical direction has been erected slightly obliquely from the vertical direction due to its construction error or the like, usually, the upper steel pipe 11u above this However, a gap as shown in FIG. 1B is formed between the lower steel pipe 11d erected obliquely and the upper steel pipe 11u erected vertically thereon. G is formed.

  When such a gap G occurs, the steel pipes 11u and 11d are not properly in contact with each other at the pipe end faces 11ua and 11da, so that the compression axial force is applied to the pipe end faces 11ua and 11da of the steel pipes 11u and 11d. It becomes difficult to receive. That is, the steel pipes 11u and 11d are unlikely to contribute to the transmission of the compression axial force, and the compression axial force is received exclusively by the concrete 21, and as a result, the load resistance performance of the compression axial force of the column may be lowered as a whole. is there.

  The present invention has been made in view of the conventional problems as described above, and the purpose thereof is to make welding on site almost unnecessary, and without reducing the space outside the pipe material such as a steel pipe. It is to improve the load bearing performance of the axial force of the column by ensuring that the compression axial force can be transmitted between the two.

In order to achieve this object, the invention shown in claim 1
A pipe connection structure that connects the pipes that are the pillars of the structure in the vertical direction,
Between the pipe materials adjacent to each other in the vertical direction, a plurality of sandwich materials that are in surface contact with the pipe end surface of the pipe material are interposed in parallel with each other,
The pipe material is filled with a cement-based composition across at least the connection position between the pipe materials,
The contact surface between at least one of the tube members and the sandwich member is a tapered surface inclined from the horizontal direction,
The movement of the pinching material outward in the pipe radial direction of the pipe is constrained by the tapered surface, and the movement of the pinching material inward in the pipe radial direction is filled in the pipe. Further, it is restricted by the cementitious composition.

According to the first aspect of the present invention, the connection structure is neither a weld joint nor a bolt joint. Therefore, on-site welding can be made almost unnecessary, and the space outside the pipe can be substantially reduced with a splice plate or the like.
The sandwiching material is in surface contact with the pipe end surfaces of the upper and lower pipes. Therefore, the transmission of the compression axial force between the pipe members is reliably performed via the sandwiching material, so that the pipe material also contributes effectively to the transmission of the compression axial force, and as a result, the load resistance performance of the column axial force. Can be increased.
Furthermore, the movement of the pinching material outward and inward in the tube diameter direction is restricted by the tapered surface and the cementitious composition, respectively. Therefore, it is effectively prevented by the taper surface and the cementitious composition that the pinching material falls off the pipe material, and as a result, the compression axial force between the pipe materials is reliably and stably transmitted via the pinching material. Can do.
In addition, since a plurality of sandwiching materials are interposed in parallel, each sandwiching material can be moved outward in the pipe radial direction independently of each other, and the tube end surface of the tubing and the sandwiching material are brought into a surface contact state. Easy to adjust. Therefore, it becomes possible to more reliably transmit the compression axial force between the pipe members.

Invention of Claim 2 is the connection structure of the pipe material of Claim 1, Comprising:
On the inner peripheral surface of the tube material, a protruding portion protruding inward in the tube diameter direction is provided,
In the cementitious composition, a joint material is embedded so as to straddle the installation position of the protruding portion of one of the pipe materials and the installation position of the protruding portion of the other pipe material. Features.

  According to the second aspect of the present invention, since the projecting portion and the joint material are arranged in the above-described positional relationship, the tensile axial force acting on one pipe material among the pipe materials is the one pipe material. A portion of the cement-based composition between the protrusion of the pipe and the joint material, the joint material, and a portion of the cement-based composition between the protrusion of the other pipe and the joint material. Promptly communicated. Therefore, the tensile axial force can be reliably transmitted between the pipe members, and as a result, the load resistance performance of the column with respect to the tensile axial force can be enhanced.

Invention of Claim 3 is the connection structure of the pipe material of Claim 1 or 2, Comprising:
The pipe is a rectangular pipe having a rectangular cross-sectional shape,
The sandwiching material is provided corresponding to each of the four tube wall portions of the rectangular pipe.

  According to the third aspect of the present invention, the sandwiching material is provided for each tube wall portion of the tube material. Therefore, even if the size of the gap between the pipe materials is different for each tube wall portion, each pinching material is removed in the pipe radial direction according to the size of the gap of the corresponding tube wall portion. By moving in the direction, each sandwich member can fill the corresponding gap. As a result, each sandwich member is interposed between the tube members in a surface contact state with the tube end surface of the corresponding tube wall portion.

Invention of Claim 4 is the connection structure of the pipe material in any one of Claim 1 thru | or 3, Comprising:
Both the pipe materials of the pipe materials have the tapered surface as the contact surface, respectively.

  According to the fourth aspect of the present invention, since both the pipe materials have the tapered surfaces, the movement of the sandwiching material outward in the pipe radial direction is reliably restrained.

The invention shown in claim 5 is a pipe connecting method for connecting pipes to be pillars of a structure vertically.
A tapered surface forming step of forming a tapered surface inclined from the horizontal direction on the tube end surface of at least one of the tubular materials;
A sandwiching material forming step of forming a sandwiching material having a tapered surface corresponding to the tapered surface of the tube end surface;
A sandwiching material interposing step of placing the tubular material and the sandwiching material such that a plurality of the sandwiching materials are interposed in parallel between the tubular materials adjacent in the vertical direction;
The pinching material and the pipe material are brought into surface contact by moving the pinching material outward in the pipe radial direction of the pipe material while resisting the restriction of the outward movement of the pipe radial direction by the tapered surface. A surface contact process to make a state;
Filling the pipe with a cement-based composition so as to straddle at least the connecting position of the pipes while solidifying the cement-based composition filled, while maintaining the surface contact state And a solidifying step.

  According to the fifth aspect of the present invention, the pipe connecting structure according to the first aspect can be formed.

The invention shown in claim 6 is the pipe connection method according to claim 5,
In the pinching material interposed arrangement step, the pipe materials are temporarily fixed by an erection piece to restrain relative movement between the pipe materials in which the pinching material is interposed,
In the surface contact step, the pinch member is moved outward in the tube radial direction by a jack member installed outside the tube member,
In the cement-based composition filling and solidifying step, the erection piece is removed from the pipe material after the cement-based composition filled in the pipe material is solidified.

  According to the sixth aspect of the present invention, since the tube members are temporarily fixed using the erection piece in the sandwiching material interposed arrangement step, the tubes can be accurately positioned. Further, in the cement-based composition filling and solidifying step, the erection piece is removed from the tube material after the cement-based composition is solidified, so that the space outside the tube material is not substantially lost.

  According to the present invention, on-site welding is almost unnecessary, and it is possible to reliably transmit the compression axial force between the pipes while substantially reducing the space outside the pipes such as steel pipes. The load bearing performance of the axial force can be increased.

FIG. 1A and FIG. 1B are schematic longitudinal sectional views showing the problems of the connection structure of the reference example. FIG. 2A is a schematic longitudinal sectional view of a pipe connecting structure according to the present embodiment, and FIGS. 2B and 2C are a BB arrow view and a CC arrow view in FIG. 2A, respectively. FIG. 3A is a schematic longitudinal sectional view showing a state in which a tensile axial force is smoothly transmitted between the steel pipes 11u and 11d by the connection structure of the present embodiment, and FIG. 3B shows a compression axial force by the connection structure. It is a schematic longitudinal cross-sectional view which shows a mode that it is smoothly transmitted between the steel pipes 11u and 11d. 2 is a schematic enlarged view of a pinch material 31. FIG. 5A to 5E are explanatory views of a connection method for forming the above-described connection structure. FIG. 6A is a schematic longitudinal sectional view of a modified example of the connection structure, and FIGS. 6B and 6C are a BB arrow view and a CC arrow view in FIG. 6A, respectively. 7A and 7B are schematic longitudinal sectional views showing other embodiments.

=== This Embodiment ===
FIG. 2A is a schematic vertical cross-sectional view of a pipe connection structure according to the present embodiment. Moreover, FIG. 2B and FIG. 2C are the BB arrow directional view and CC arrow directional view in FIG. 2A, respectively. In these drawings, hatching that should originally be shown in the cross-sectional portion may be omitted for the purpose of preventing complication of the drawings.

  As shown in FIGS. 2A to 2C, the tube material 11 serving as a pillar of the structure is, for example, a rectangular steel pipe 11 (corresponding to a rectangular pipe) having a rectangular cross section. And this steel pipe 11,11 ... is connected in series in the up-down direction for the number corresponding to the height of a structure, and the steel pipe pillar is formed.

  Here, in this embodiment, the predetermined device is given with respect to the connection structure of the steel pipes 11 and 11 adjacent to an up-down direction. And based on this device, it is possible to reliably transmit the tensile axial force and the compressive axial force between the steel pipes 11 and 11 to be connected while substantially not using the welding structure and the bolting structure. ing.

  Hereinafter, although this connection structure is demonstrated in detail, in the following description, the steel pipe 11 located above among the steel pipes 11 and 11 adjacent to an up-down direction is also called "upper steel pipe 11u", and the downward direction The steel pipe 11 positioned is also referred to as “lower steel pipe 11d”. In addition, the radial direction of the steel pipe 11 is also referred to as “tube diameter direction”, and the longitudinal direction of the steel pipe 11 is also referred to as “tube axis direction”.

  This connection structure includes a tensile axial force transmission member that contributes to transmission of tensile axial force between the steel pipes 11u and 11d, and a compression axial force transmission member that contributes to transmission of compression axial force between the steel pipes 11u and 11d. ,have.

<<< Tensile axial force transmission member >>>
The tensile axial force transmission member straddles a plurality of cotters 13, 13... Integrally provided as protrusions on the inner peripheral surfaces of the steel pipes 11u, 11d, and a connecting position Pj between the steel pipes 11u, 11d in the steel pipes 11u, 11d. And concrete 21 as a cement-based composition densely filled with, and a plurality of bar-shaped reinforcing bars 15, 15... As a joint material embedded in the concrete 21.

  Here, the cotters 13, 13,... Are provided on the inner peripheral surface of the lower end portion of the upper steel pipe 11u and the inner peripheral surface of the upper end portion of the lower steel pipe 11d, respectively. Further, the reinforcing bars 15, 15... Are arranged across the installation positions of the above cotters 13, 13... While being spaced from the inner peripheral surfaces of the steel pipes 11u, 11d. Therefore, for example, when an upward force Fu acts on the upper steel pipe 11u as a tensile axial force as shown in the schematic longitudinal sectional view of FIG. 3A, the tensile axial force is reduced along a path indicated by an arrow in the figure. It is transmitted to the steel pipe 11d. That is, “vertical tensile stress of the upper steel pipe 11u” → “compressive stress of the portion 21p of the concrete 21 between the cotter 13 and the reinforcing bar 15 of the upper steel pipe 11u” → “vertical tensile stress of the reinforcing bar 15” → “rebar 15 and lower It is transmitted to the lower steel pipe 11d through each aspect of “compressive stress of the portion 21p of the concrete 21 between the cotter 13 of the steel pipe 11d” → “vertical tensile stress of the lower steel pipe 11d”. Conversely, when a downward force acts on the lower steel pipe 11d as a tensile axial force, the tensile axial force is transmitted to the upper steel pipe 11u in a flow opposite to that described above. Therefore, the tensile axial force can be smoothly and reliably transmitted between the upper steel pipe 11u and the lower steel pipe 11d.

  In this example, as shown in FIG. 2B, as the cotter 13, an annular member 13 formed by bending a steel flat bar in an annular shape is used. Therefore, although the cotter 13 is provided continuously over the entire circumference of the inner peripheral surfaces of the steel pipes 11u and 11d, it is not limited to this. For example, as the cotter 13, a plurality of divided pieces (not shown) obtained by dividing the annular member 13 may be used, and these pieces may be provided intermittently in the circumferential direction of the inner peripheral surface of each steel pipe 11u, 11d. . In the example of FIG. 2A, two cotters 13 are provided as a plurality of examples for each of the upper steel pipe 11u and the lower steel pipe 11d. However, three or more cotters 13 may be provided. . Further, in this example, the cotter 13 is fixed to the steel pipes 11u and 11d by whole-wall fillet welding, but is fixed integrally to the inner peripheral surface of the steel pipes 11u and 11d, that is, capable of transmitting stress. As long as it is present, it is not limited to all-around fillet welding, and for example, intermittent fillet welding may be used.

  In the example of FIG. 2B, a plurality of reinforcing bars 15, 15... As joint members are arranged intermittently in the circumferential direction of the steel pipes 11u, 11d, thereby stabilizing the transmission of tensile axial force. It is planned. Each reinforcing bar 15 is permanently fixed and supported by the adhesive force with the surrounding concrete 21. However, before the concrete 21 is filled in the steel pipes 11u and 11d (for example, the time point in FIGS. 5A to 5C), the reinforcing bar 15 must be temporarily supported by an appropriate temporary support member 16, and this FIG. In the example of FIG. 2B, hoop muscles 16 a and heel muscles 16 b and 16 b are used as the temporary support member 16. That is, by temporarily fixing the reinforcing bars 15, 15... To the hoop bars 16 a with wires or the like (not shown) and placing the hoop bars 16 a on the barbs 16 b, 16 b spanned over the cotter 13, Reinforcing bars 15, 15... Are temporarily supported by the upper steel pipe 11u. Incidentally, the temporary support member 16 is embedded in the concrete 21 as it is, but basically does not contribute to the transmission of the tensile axial force between the steel pipes 11u and 11d. Moreover, depending on the case, the reinforcing bars 16b and 16b may be passed over the cotter 13 of the lower steel pipe 11d, and thereby the reinforcing bar 15 may be temporarily supported by the lower steel pipe 11d.

  As shown in FIG. 2A, the concrete 21 is selectively filled into both the in-pipe space S11u at the lower end of the upper steel pipe 11u and the in-pipe space S11d at the upper end of the lower steel pipe 11d. That is, in the example of FIG. 2A, the concrete 21 is not filled over the entire length of the steel pipes 11u and 11d, but fills a predetermined range A21 including the connection position Pj so as to straddle the connection position Pj between the steel pipes 11u and 11d. The target range A21 is selectively filled. Therefore, for example, the steel pipe columns 11u and 11d are not filled in the central portion in the vertical direction, and this steel pipe column is formed not as a CFT (concrete filled steel pipe) structure but as an S (steel frame) structure.

  The filling target range A21 is partitioned by a pair of upper and lower partition plates 17 and 17. That is, the upper partition plate 17 is fixed at a position above the connection position Pj by a predetermined distance in the upper steel pipe 11u, and the lower partition plate 17 is only a predetermined distance from the connection position Pj in the lower steel pipe 11d. It is fixed at a lower position. And the injection hole h11 of the concrete 21 is drilled in the upper steel pipe 11u so as to communicate with the in-pipe spaces S11u and S11d sandwiched between the upper partition plate 17 and the lower partition plate 17, and the injection hole h11 Therefore, the concrete 21 is filled in the pipe inner spaces S11u and S11d. The injection hole h11 may be formed toward the lower steel pipe 11d.

<<< Compressive axial force transmission member >>>
As shown in FIG. 2A, the compression axial force transmission member includes a plurality of steel sandwich members 31, 31... Interposed between the steel pipes 11 u and 11 d adjacent in the vertical direction in parallel. In the example of FIG. 2A and FIG. 2C, each sandwiching member 31, 31... Is provided corresponding to each of the four tube wall portions 11w, 11w... Of the square steel pipe 11u (11d). Two sandwich members 31, 31... Are arranged side by side. As shown in FIG. 2A, each sandwich member 31 is in surface contact with the pipe end face 11ua of the upper steel pipe 11u and the pipe end face 11da of the lower steel pipe 11d. Therefore, for example, when a downward force Fd acts on the upper steel pipe 11u as a compression axial force as shown in the schematic longitudinal sectional view of FIG. 3B, the compression axial force is transmitted to the lower steel pipe 11d through a path indicated by an arrow in FIG. Is done. That is, it is transmitted to the lower steel pipe 11d through each aspect of “vertical compressive stress of the upper steel pipe 11u” → “vertical compressive stress of the sandwiching material 31” → “vertical compressive stress of the lower steel pipe 11d”. Conversely, when an upward force acts on the lower steel pipe 11d as a compression axial force, the compression axial force is transmitted to the upper steel pipe 11u in a flow opposite to that described above. Therefore, the compression axial force can be smoothly and reliably transmitted between the upper steel pipe 11u and the lower steel pipe 11d.

  Further, as shown in the schematic enlarged view of FIG. 4, the pipe end surface 11ua of the upper steel pipe 11u and the pipe end surface 11da of the lower steel pipe 11d are respectively tapered surfaces 11uat and 11dat inclined from the horizontal direction for each pipe wall portion 11w. Is formed. Therefore, each sandwich member 31 also has upper and lower tapered surfaces 31 uat and 31 dat respectively corresponding to the tapered surface 11 uat of the pipe end surface 11 ua of the upper steel pipe 11 u and the tapered surface 11 dat of the pipe end surface 11 da of the lower steel pipe 11 d. The upper tapered surface 31 uat of the sandwiching material 31 is formed with an inclination that descends as it goes outward in the tube radial direction, while the lower tapered surface 31 dat is outward in the tube radial direction. It is formed in a slope that rises as it goes. Thereby, the longitudinal cross-sectional shape of the sandwiching material 31 and the vertical cross-sectional shape of the gap between the pipe end surface 11ua of the upper steel pipe 11u and the pipe end surface 11da of the lower steel pipe 11d are tapered toward the outside in the pipe radial direction as a whole. It has a wedge shape.

  Therefore, based on the surface contact between the upper tapered surfaces 11 uat and 31 uat and the surface contact between the lower tapered surfaces 11 dat and 31 dat, the outward movement of the sandwiching material 31 in the tube radial direction is restricted (restricted). The On the other hand, the inward movement of the sandwiching material 31 in the pipe radial direction is restricted (restricted) by the concrete 21 filled in the steel pipes 11u and 11d. Then, through the restraint (regulation) of the movement of the sandwiching material 31 inside and outside, the sandwiching material 31 is effectively prevented from falling off from the steel pipes 11u and 11d. As a result, the compression axial force is exerted between the steel pipes 11u and 11d. Is transmitted stably.

  In addition, the inclination angles θu and θd from the horizontal direction of the tapered surfaces 31 uat and 31 dat of the sandwiching material 31 are set to arbitrary values selected from an angle range larger than 0 ° and smaller than 90 °. In the example of FIG. 4, the inclination angle θu of the upper taper surface 31 uat and the inclination angle θd of the lower taper surface 31 dat are the same angle, but the present invention is not limited to this and may be different.

  Incidentally, as described above, according to the configuration in which the plurality of sandwiching members 31, 31... Are interposed between the steel pipes 11u, 11d in parallel with each other, each sandwiching member 31, 31. When arrange | positioning between 11u and the lower steel pipe 11d, each pinching material 31,31 ... can be moved to the outward of a pipe radial direction mutually independently. Therefore, even if the size of the gap between the pipe end faces 11ua, 11da is different for each of the four pipe wall portions 11w, 11w,... Are moved independently of each other in the tube radial direction, so that the sandwiching materials 31, 31... Can be brought into surface contact with the corresponding tube end surfaces 11ua, 11da, respectively, and the gap can be completely filled. Therefore, it is possible to reliably transmit the compression axial force.

  Further, in the example of FIG. 4, each sandwiching member 31 is designed to have a dimension that protrudes laterally in the tube radial direction from the outer peripheral surface and inner peripheral surface of the steel pipes 11 u and 11 d. Therefore, it is possible to ensure a large contact area with the pipe end surfaces 11ua and 11da of the upper steel pipe 11u and the lower steel pipe 11d, which contributes to stabilization of transmission of the compression axial force.

  5A to 5E are explanatory views of a connecting method for forming the above-described connecting structure, and in each figure, a schematic vertical sectional view is shown in the upper stage and a schematic horizontal sectional view is shown in the lower stage. In these drawings, some components are not shown in order to prevent the complication of the drawings. For example, in the upper drawing, the temporary support member 16 that temporarily supports the reinforcing bars 15 is not shown, and in the lower drawing, the cotter 13 is not shown. Furthermore, in the upper drawing, the cotter 13 and the reinforcing bar 15 are shown as being in direct contact with each other, but actually, a temporary support member 16 is interposed between them as shown in FIG. 2A. There is no direct contact.

  As shown in FIG. 5A, first, in a factory equipped with a processing machine, taper surfaces 11uat and 11dat are cut on the pipe end surface 11ua of the upper steel pipe 11u and the pipe end surface 11da of the lower steel pipe 11d, respectively (tapered surface forming step). In addition, a pinching material 31 having tapered surfaces 31 uat and 31 dat in the upper and lower sides is also formed (pinching material forming step). In parallel or in parallel with these, the erection pieces 41u and 41d are fixed to the lower end of the upper steel pipe 11u and the upper end of the lower steel pipe 11d, respectively, by welding or the like. Further, in parallel or in parallel with these, the partition plates 17 and 17 are fixed in the upper steel pipe 11u and the lower steel pipe 11d, respectively, and the cotter 13 is fixed to the upper steel pipe 11u and the lower steel pipe 11d.

  Next, the upper steel pipe 11u and the lower steel pipe 11d are carried into the construction site. Then, the lower steel pipe 11d is fixed to the foundation (not shown) of the structure by an appropriate connecting structure, or is connected to the upper end of the steel pipe (not shown) already installed at the construction site. Connected through structure.

  Then, as shown to FIG. 5A, each pinching material 31 is mounted on the pipe end surface 11da of the lower steel pipe 11d, making it correspond to each four pipe wall parts 11w of the lower steel pipe 11d. Further, the steel bar 11 u is temporarily supported by the cotter 13 of the upper steel pipe 11 u via temporary support members 16 (not shown in FIG. 5A) such as the hoop bars 16 a and the barbs 16 b.

  Then, as shown in FIG. 5A, the upper steel pipe 11u is positioned above the lower steel pipe 11d. Then, by lowering the upper steel pipe 11u, the upper steel pipe 11u is placed on the lower steel pipe 11d while inserting the reinforcing bar 15 partially protruding downward from the pipe end of the upper steel pipe 11u into the lower steel pipe 11d. As shown in FIG. 5B, each pinching material 31 is interposed between the pipe end surface 11ua of the upper steel pipe 11u and the pipe end surface 11da of the lower steel pipe 11d (the pinching material interposition process).

  Next, as shown in FIG. 5B, by fixing the fixing plate 43 over both the erection piece 41u of the upper steel pipe 11u and the erection piece 41d of the lower steel pipe 11d and bolting, the fixing plate 43 is fixed to each erection piece 41u. , 41d. Thereby, the upper steel pipe 11u and the lower steel pipe 11d are temporarily fixed in a state in which the relative movement of each other is restricted.

  Then, as shown in FIG. 5C, a pair of jack members 51, 51 are installed for each sandwich member 31, and each sandwich member 31 is moved outward in the tube radial direction by each jack member 51. At the time of this movement, the outward movement in the pipe radial direction is constrained (restricted) based on the tapered surfaces 31 uat and 31 dat of the sandwiching material 31 and the tapered end surfaces 11 ua and 11 da of the upper and lower steel pipes 11 u and 11 d. ) Acts on each pinching material 31, and by moving each pinching material 31 while resisting this resistance force, the pinching material 31 becomes the pipe end surfaces 11 ua and 11 a of the upper steel pipe 11 u and the lower steel pipe 11 d. 11 da is brought into surface contact (surface contact process).

  Incidentally, the jack member 51 has, for example, a U-shaped cross-section member 55 through which a bolt 53 is penetrated as a main body. That is, the U-shaped member 55 has a pair of leg portions 55b and 55b that are integrally connected via the connection portion 55a. The bolt 53 passes through the connecting portion 55a, and the bolt 53 can advance and retreat in a direction parallel to the leg portion 55b. Therefore, for example, the sandwiching material 31 is moved outward as follows.

  First, by rotating the bolt 53 with one leg 55b abutting on the outer peripheral surface of the upper steel pipe 11u and the other leg 55b abutting on the outer peripheral surface of the lower steel pipe 11d, The male screw at the tip is screwed into the female screw of the sandwiching material 31. As the screwing progresses, the head of the bolt 53 comes into contact with the connecting portion 55a. Then, based on this contact, the bolt 53 removes the pinching material 31 from the tube radial direction. The reaction force required for pulling out in the direction can be taken, so that the pinching material 31 can be pulled out outward in the pipe radial direction. However, the jack member 51 is not limited to the above configuration, and another type of jack member may be used.

  Then, as shown in FIG. 5D, the concrete 21 is filled into the steel pipes 11u and 11d from the injection hole h11 drilled in the upper steel pipe 11u. Here, as described above, the inside of the upper steel pipe 11u and the lower steel pipe 11d are filled. In each, partition plates 17 and 17 are fixed in advance. Therefore, the concrete 21 is selectively and densely filled only in the space of the filling target range A21 defined by the upper and lower partition plates 17 and 17. As a result, as shown in FIGS. 5D and 5E, the reinforcing bars 15 and the cotters 13 in the upper and lower steel pipes 11u and 11d are embedded in the concrete 21. Further, a portion of the sandwiching material 31 located in the steel pipes 11 u and 11 d is also embedded in the concrete 21.

  When the concrete 21 is solidified, as shown in FIG. 5E, the jack member 51 is removed from the sandwiching material 31 and the upper and lower steel pipes 11u, 11d, and the erection pieces 41u, 41d are also removed from the upper and lower steel pipes 11u, 11d by fusing or the like. (Cementitious composition filling and solidifying step). And with the above, the steel pipes 11u and 11d adjacent up and down will be in the state connected by the connection structure of this embodiment.

  6A to 6C are explanatory diagrams of modified examples of the coupling structure. 6A is a schematic longitudinal cross-sectional view, and FIGS. 6B and 6C are a BB arrow view and a CC arrow view in FIG. 6A, respectively.

  Here, the main difference from the above-mentioned embodiment is that the steel pipe pillar of this modification is not S-structure but CFT-structure. That is, this modification is different in that the partition plate 17 is not provided in the steel pipes 11u and 11d, and the concrete 21 is filled over substantially the entire length of the steel pipes 11u and 11d, and other configurations are substantially the same. It is. Therefore, in the same figure, the same code | symbol is attached | subjected about the same structure as the above-mentioned embodiment, and the description is abbreviate | omitted.

  As described above, in this modification, the concrete 21 is filled over substantially the entire length of the upper steel pipe 11u and the entire length of the lower steel pipe 11d. As a result, a CFT steel pipe column is formed. The filling of the concrete 21 may be performed by the injection hole h11 (see FIG. 2A) drilled in the upper steel pipe 11u or the lower steel pipe 11d, as described above. A tremy pipe may be inserted into the steel pipe 11u and the lower steel pipe 11d, and the concrete 21 may be filled with the tremy pipe.

  In addition, the connection method for forming the connection structure of this modified example is substantially the same as that of the S-steel pipe column described in FIGS. 5A to 5E. Therefore, the description is omitted.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible in the range which does not deviate from the summary.

  In the above-described embodiment, the sandwiching material 31 is exemplified by a steel material, but if it is capable of transmitting a compression axial force without being damaged by being in surface contact between the steel pipes 11u and 11d, It is not limited to the above-mentioned steel. For example, it may be made of a metal such as an aluminum alloy, or may be a cement composition such as concrete.

  In the above-described embodiment, as shown in FIG. 4, both the pipe end face 11ua of the upper steel pipe 11u and the pipe end face 11da of the lower steel pipe 11d are formed on the tapered surfaces 11uat and 11dat inclined from the horizontal direction. The sandwiching material 31 also has tapered surfaces 31 uat and 31 dat in the vertical direction, but the present invention is not limited to this.

  For example, as shown in FIG. 7A, only the pipe end face 11ua of the upper steel pipe 11u may be a tapered face 11uat, and the pipe end face 11da of the lower steel pipe 11d may be a horizontal plane 11dah. In this case, the pinching material 31 also has a tapered surface 31 uat formed only on the upper side, and a horizontal surface 31 dah formed on the lower side. On the contrary, as shown in FIG. 7B, only the pipe end surface 11da of the lower steel pipe 11d may be a tapered surface 11dat, and the pipe end surface 11ua of the upper steel pipe 11u may be a horizontal plane 11uah. In this case, a tapered surface 31dat is formed only under the sandwiching material 31, and a horizontal surface 31uah is formed thereon.

  In the above-described embodiment, the steel pipes 11u and 11d are illustrated as an example of the pipe material forming the pillar, but the present invention is not limited thereto. For example, a metal pipe such as an aluminum alloy may be used.

  In the above-described embodiment, the rectangular steel pipes 11u and 11d having a rectangular cross section are illustrated as an example of the pipe material, but the present invention is not limited thereto. For example, a circular (round) steel pipe having a circular cross section may be used, or a steel pipe having a triangular cross section may be used. Furthermore, a polygonal steel pipe having a cross section having five or more corners may be used. It may be used. In the case of the former circular steel pipe, a plurality of members having a circular arc shape in plan view along the circumferential direction of the steel pipe are provided in parallel as the sandwiching material 31. Further, in the case of the latter polygonal steel pipe, the sandwiching material 31 is provided corresponding to each tube wall portion corresponding to each side of the polygon.

  In the above-described embodiment, the concrete 21 is filled in the steel pipes 11u and 11d as an example of the cementitious composition, but is not limited thereto. For example, mortar may be filled in some cases.

  In the above-described embodiment, the reinforcing bar 15 is used as the joint material, but the present invention is not limited to this. In other words, any member that can point in the longitudinal direction in the vertical direction can be used in place of the reinforcing bar 15, and for example, a deformed steel bar or a steel plate having a longitudinal direction may be used.

  In the above-described embodiment, the hoop bar 16a and the barb 16b are exemplified as the temporary support member 16 that temporarily supports the reinforcing bar 15 to the steel pipes 11u and 11d, but the present invention is not limited thereto. That is, as long as it is a member that can temporarily support the rebar 15 in a state of floating in the air until the concrete 21 filled in the steel pipes 11u and 11d is solidified, the members other than the hoop rebar 16a and the rebar 16b described above are used. A member may be used.

11 Steel pipe (pipe material),
11u upper steel pipe (pipe material), 11ua pipe end face,
11uat taper surface, 11uah horizontal surface,
11d lower steel pipe (pipe material), 11da pipe end face,
11 dat taper surface, 11 dah horizontal surface,
11w pipe wall,
13 cotters (protrusions),
15 Rebar (joint material),
16 temporary support member, 16a hoop muscle, 16b gluteal muscle,
17 Partition plate,
21 concrete (cement-based composition), 21p part,
31 sandwiching material, 31uat upper tapered surface, 31dat lower tapered surface,
31 uah horizontal plane, 31 dah horizontal plane,
41u erection piece, 41d erection piece, 43 fixing plate,
51 jack members, 53 bolts,
55 U-shaped member in cross section, 55a connection part, 55b leg part,
Pj connection position, A21 filling target range,
S11u inner space, S11d inner space,
h11 injection hole,
Fu Tensile axial force, Fd compression axial force,
θu tilt angle, θd tilt angle,

Claims (6)

A pipe connection structure that connects the pipes that are the pillars of the structure in the vertical direction,
Between the pipe materials adjacent to each other in the vertical direction, a plurality of sandwich materials that are in surface contact with the pipe end surface of the pipe material are interposed in parallel with each other,
The pipe material is filled with a cement-based composition across at least the connection position between the pipe materials,
The contact surface between at least one of the tube members and the sandwich member is a tapered surface inclined from the horizontal direction,
The movement of the pinching material outward in the pipe radial direction of the pipe is constrained by the tapered surface, and the movement of the pinching material inward in the pipe radial direction is filled in the pipe. Further, the connecting structure of pipe materials, which is constrained by the cementitious composition. The pipe connection structure according to claim 1,
On the inner peripheral surface of the tube material, a protruding portion protruding inward in the tube diameter direction is provided,
In the cementitious composition, a joint material is embedded so as to straddle the installation position of the protruding portion of one of the pipe materials and the installation position of the protruding portion of the other pipe material. The connecting structure of the characteristic tube material. The pipe connection structure according to claim 1 or 2,
The pipe is a rectangular pipe having a rectangular cross-sectional shape,
The pipe connection structure, wherein the sandwiching material is provided corresponding to each of the four pipe wall portions of the rectangular pipe. It is the connection structure of the pipe material in any one of Claims 1 thru | or 3, Comprising:
Both the pipe materials of the said pipe materials have the said taper surface as said contact surface, respectively, The connection structure of the pipe materials characterized by the above-mentioned. A pipe connecting method for connecting pipes to be pillars of a structure vertically.
A tapered surface forming step of forming a tapered surface inclined from the horizontal direction on the tube end surface of at least one of the tubular materials;
A sandwiching material forming step of forming a sandwiching material having a tapered surface corresponding to the tapered surface of the tube end surface;
A sandwiching material interposing step of placing the tubular material and the sandwiching material such that a plurality of the sandwiching materials are interposed in parallel between the tubular materials adjacent in the vertical direction;
The pinching material and the pipe material are brought into surface contact by moving the pinching material outward in the pipe radial direction of the pipe material while resisting the restriction of the outward movement of the pipe radial direction by the tapered surface. A surface contact process to make a state;
Filling the pipe with a cement-based composition so as to straddle at least the connecting position of the pipes while solidifying the cement-based composition filled, while maintaining the surface contact state And a solidifying step. It is the connection method of the pipe material of Claim 5, Comprising:
In the pinching material interposed arrangement step, the pipe materials are temporarily fixed by an erection piece to restrain relative movement between the pipe materials in which the pinching material is interposed,
In the surface contact step, the pinch member is moved outward in the tube radial direction by a jack member installed outside the tube member,
In the cement-based composition filling and solidifying step, the erection piece is removed from the pipe material after the cement-based composition filled in the pipe material is solidified.