JP2009007750A - Connection structure of pile and column of steel construction building, and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of a pile and a column of a steel construction building and its construction method that can rationally improve the structural strength of the connection structure for integrally connecting a steel column to an existing concrete pile member. <P>SOLUTION: The connection structure of the pile and column of the steel construction building for connecting the existing concrete pile member 1 of hollow cylinder shape driven into the ground G, to the steel column 2 without using a foundation beam or a footing, comprises a connecting member 6 formed with an SC pile part 4 at the lower part by providing a lower part of a steel pipe member 3 integrally with concrete C1 in annular shape along the inner peripheral surface, and a steel cylinder part 5 at the upper part on which a column base part 2a of the steel column is disposed, and buried in the ground, on a pile head 1a of the precast concrete pile member; and a joint fitting 7 for integrally joining the lower end 6a of the connecting member to the pile head of the existing concrete pile member. Concrete C2 for integrally joining the connecting member to the steel column is filled inside the connecting member from a position below the steel cylinder part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a pile-column connection structure of a steel building and a construction method thereof that can rationally improve the structural strength of a connection structure that integrally connects a steel column and a ready-made concrete pile member.

As a connecting structure of steel building columns and piles that are constructed by connecting piles and steel columns without using foundation beams and footings, a circular hollow cross-section of precast concrete piles and steel columns is placed at a predetermined position on the ground. In between, the steel column that is bonded to the end face hardware attached to the upper end face of the pile head of the prefabricated concrete pile with the same outer diameter or less as that of the precast concrete pile and installed at a predetermined position inside the pile is filled in the inside. It is known that a steel pipe that is integrated with and connected to the preformed concrete pile is provided and the steel pipe is joined to the preformed concrete pile and driven (see Patent Document 1).
Japanese Patent No. 3900344

  By the way, in background art, the concrete which united a steel column with a precast concrete pile was filled in the steel pipe of the single-piece | unit structure joined on the pile head of a readymade concrete pile. In addition, this single-piece steel pipe is directly joined to the existing concrete pile. For this reason, considering the bending moment generated in the steel column due to an earthquake or the like, the steel pipe has been forced to bear an extremely large load. This also caused a large stress to occur at the joint between the steel pipe and the precast concrete pile. Therefore, in the connection structure of the steel column and the existing concrete pile of the background art, there existed a subject that intensity | strength might become severe.

  The present invention was devised in view of the above-described conventional problems, and is a steel structure building capable of rationally improving the structural strength of a connection structure that integrally connects a steel column and a ready-made concrete pile member. The purpose is to provide a connection structure and its construction method.

  The connection structure between piles and columns of a steel structure building according to the present invention is a steel frame that connects a prefabricated concrete pile member in the form of a hollow cylinder placed on the ground and a steel column without using foundation beams or footings. In the connecting structure of piles and pillars in a building, the SC pile part is formed in the lower part by providing concrete in an annular shape along the inner peripheral surface at the lower part of the steel pipe material, and the steel column pillars at the upper part. A steel cylinder portion in which a leg portion is arranged is formed, and a connecting member that is embedded in the ground on a pile head of the ready-made concrete pile member, a lower end portion of the connecting member, and the ready-made concrete pile A joint fitting for integrally joining the pile heads of the member is provided, and the concrete for integrally joining the connecting member and the steel column is filled into the connecting member from below the steel cylinder portion. It is characterized by being.

  The joint fitting is provided at a pile head hardware provided at a pile head of the ready-made concrete pile member, and at a lower end portion of the SC pile portion of the connection member, and is superimposed on the pile head hardware from above and below. It is characterized by being comprised from SC pile part hardware and the restraint hardware which restrains these pile head hardware and SC pile part hardware from an up-down direction and a horizontal direction.

  The concrete for integrally joining the connecting member and the steel column is filled upward from the inside of the SC pile portion above the position of the joint fitting.

  The concrete for integrally joining the connecting member and the steel column is filled upward from the inside of the ready-made concrete pile member below the position of the joint fitting.

  The construction method of the pile-column connection structure of the steel building according to the present invention is to connect the pre-fabricated concrete pile member in the form of a hollow cylinder placed on the ground and the steel column without using the foundation beam or footing. In the construction method of the steel-frame building pile-column connection structure, the SC pile part is provided in the lower part by providing concrete in an annular shape along the inner peripheral surface at the lower part of the steel pipe material, and the upper part. And a connecting member having a steel cylinder portion in which the column base portion of the steel column is disposed, and the ready-made concrete pile member is created, and the ready-made concrete pile member is inserted into a drilling hole formed in the ground. A first step of performing a joining operation for integrally joining the connecting member to the pile head of the ready-made concrete pile member exposed above the ground via a joint fitting; Around the top edge A second step of inserting the column base portion of the steel column into the steel cylinder portion with the ready-made concrete pile member and the connecting member inserted into the drilling hole so as to be exposed from the board; and the connection And a third step of filling concrete, which integrally joins the member and the steel column, from the inside of the SC pile portion above the position of the joint fitting upward.

  In place of filling the concrete from the inside of the SC pile portion above the joint bracket position, the third step is upward from the inside of the ready-made concrete pile member below the joint metal position. It is characterized by filling concrete.

  In the steel structure building pile-column connection structure and its construction method according to the present invention, it is possible to rationally improve the structural strength of the connection structure that integrally connects the steel column and the ready-made concrete pile member. In addition, it is possible to smoothly construct such a connection structure.

  EMBODIMENT OF THE INVENTION Below, one suitable embodiment of the connection structure of the pile and pillar of the steel structure building concerning this invention is described in detail with reference to an accompanying drawing. As shown in FIGS. 1 to 3, the connection structure between the pile and the pillar of the steel building according to the present embodiment is basically a hollow cylindrical body that is placed on the ground G without using a foundation beam or a footing. In the steel-frame building pile-column connection structure in which the ready-made concrete pile member 1 and the steel column 2 are connected to each other, the concrete C1 is integrally provided annularly along the inner peripheral surface of the steel pipe 3 at the bottom. As a result, the SC pile portion 4 is formed in the lower portion, and the steel cylinder portion 5 in which the column base portion 2a of the steel column 2 is disposed is formed in the upper portion, and the pile head portion 1a of the ready-made concrete pile member 1 is formed. A connecting member 6 embedded and installed in the ground G, a lower end portion 6a of the connecting member 6 and a joint fitting 7 for integrally joining the pile head 1a of the ready-made concrete pile member 1; The concrete C2 that integrally joins the steel column 2 is the steel cylinder 5 Configured be filled from the lower position inwardly coupling member 6.

  The joining metal fitting 7 is provided at the pile head hardware 8 provided on the pile head 1a of the ready-made concrete pile member 1 and the SC pile section 4 lower end of the connecting member 6 and overlaps the pile head hardware 8 from above and below. The SC pile part hardware 9 and the constrained hardware 10 for restraining the pile head part hardware 8 and the SC pile part hardware 9 from the vertical direction and the horizontal direction are configured. Concrete C2 that integrally joins the connecting member 6 and the steel column 2 is filled upward from the inside of the SC pile portion 4 above the position of the joint fitting 7.

  As shown in FIG. 5, the foundation structure applied to the steel building targeted by the present embodiment is placed in the underground G and connected to each other by a steel beam 11. The pile 1 that is joined and supports the building 12 is not provided with a footing, and the piles 1 are not connected to each other by a foundation beam, and is reasonable when applied to a low- or middle-rise building. Each pile 1 and each steel column 2 are connected by filling the connecting member 6 with concrete C2 after inserting the column base 2a into the connecting member 6 provided in the pile head 1a.

  The ready-made concrete pile member 1 is formed in a hollow cylindrical shape. For example, a PHC pile (pretension type centrifugal force prestressed concrete pile) is used. This ready-made concrete pile member 1 can be pre-boring method, Nakabori method, jet method, hydraulic press fitting method, embedding method such as large-diameter PC well method, drop hammer method, pneumatic hammer method, vibratory hammer method, hydraulic hammer method It is placed on the ground G by a driving method such as a diesel hammer method or a soundproof cover combined method. On the other hand, the steel column 2 is configured as an H-shaped steel column or a box column as is well known.

  The connecting member 6 is mainly formed of a hollow tubular steel pipe member 3 and is formed by providing concrete C1 integrally in an annular shape along the inner peripheral surface of the steel pipe member 3 at the lower part in the height direction. Thereby, as for connecting member 6, the lower part is constituted as SC pile part (steel pipe concrete pile part) 4, and the upper part where concrete C1 is not poured is constituted as steel cylinder part 5. The connecting member 6 is manufactured by a centrifugal molding method or a normal formwork method.

  In the case of the centrifugal molding method, an annular partition material is detachably installed in the steel pipe material 3 at the boundary position between the SC pile part 4 and the steel cylinder part 5 along the inner peripheral surface of the steel pipe material 3. . The width of the annular partition member is set to be substantially equal to or wider than the concrete wall thickness dimension of the SC pile portion 4. The steel pipe material 3 provided with the annular partition material is mounted on rolling means such as a rolling wheel for rolling the steel pipe material 3. While rolling the steel pipe material 3 by the rolling means, the concrete C1 is put into a position below the annular partition material. As a result, the concrete C1 is compactly filled into the inner peripheral surface of the steel pipe material 3 by the action of centrifugal force, and a concrete portion in which the inner peripheral surface has a cylindrical shape is formed inside the steel pipe material 3. Then, the connecting member 6 which has the SC pile part 4 in which concrete C1 was wound with the level | step-difference part 4a with respect to the internal peripheral surface of the steel cylinder part 5 is manufactured by removing an annular partition material.

  In the case of the formwork method, an annular formwork and a tubular formwork for placing the concrete C1 of the SC pile portion 4 are disposed inside the steel pipe material 3. The annular formwork is disposed along the inner peripheral surface of the steel pipe material 3 at the boundary position between the SC pile part 4 and the steel cylinder part 5. The cylindrical mold is formed in a cylindrical shape with an inner diameter of the annular mold, and a lower opening of the steel pipe 3 from the inner periphery of the annular mold while maintaining a gap with the inner peripheral surface of the steel pipe 3. It is arranged over. Then, concrete C1 is cast and filled in a cylindrical space formed between the cylindrical mold and the annular mold and the inner peripheral surface of the steel pipe 3. After the concrete C1 is cured, by removing these molds, the SC pile portion 4 is provided with the concrete C1 having a step portion 4a with respect to the inner peripheral surface of the steel tube portion 5 in the same manner as the centrifugal molding method. The connecting member 6 is manufactured.

  The cross-sectional shape of the connecting member 6 is formed in accordance with the cross-sectional shape of the ready-made concrete pile member 1. That is, the outer diameter dimension of the steel pipe material 3 is set so as to substantially match the outer diameter dimension of the ready-made concrete pile member 1. The wall thickness of the steel pipe material 3 is formed thinner than the wall thickness of the ready-made concrete pile member 1, and therefore the inner diameter dimension of the steel pipe material 3 is set larger than the inner diameter dimension of the ready-made concrete pile member 1. The inner diameter dimension of the SC pile portion 4 is set so as to substantially match the inner diameter dimension of the ready-made concrete pile member 1.

  The connecting member 6 is installed on the pile head 1 a of the ready-made concrete pile member 1. At this time, the SC pile portion 4 is disposed so as to face the pile head portion 1a, and therefore the upper opening portion 5a of the steel cylinder portion 5 is opened toward the steel column 2 side. Further, the entire connecting member 6 is embedded in the ground G together with the ready-made concrete pile member 1. In the steel cylinder part 5, the column base part 2a of the steel column 2 is inserted and arrange | positioned from the upper opening part 5a. The insertion depth position of the column base 2a is set to a depth position that is appropriately spaced upward from the step 4a so that a support pressure for supporting the building load is generated in the step 4a of the SC pile 4 Is preferred.

  The lower end 6a of the connecting member 6 and the pile head 1a of the ready-made concrete pile member 1 are integrally joined by a steel joint 7 that is a mechanical joint. As shown in FIG. 3, the joint fitting 7 includes an SC pile part hardware 9 provided at the lower end of the SC pile part 4 of the connecting member 6, a pile head hardware 8 provided on the pile head 1 a, and these pile head hardware. 8 and the SC pile part hardware 9 are comprised from the constrained hardware 10 which mutually integrates.

  The SC pile part hardware 9 has a width corresponding to the concrete thickness of the SC pile part 4 and is formed by being raised from the flange part 9a covering the lower end surface of the SC pile part 4 and the outer peripheral edge of the flange part 9a. An annular raised portion 9b and a first annular flange 9c that is flush with the bottom surface of the flange portion 9a and projects outward from the annular raised portion 9b are integrally formed. The annular rising portion 9b is joined to the lower end portion of the steel pipe material 3 by welding joining or the like. The SC pile part hardware 9 is attached to the steel pipe 3 in advance when the connecting member 6 is formed, and the concrete C1 is cast and filled up to the SC pile part hardware 9.

  In the case of a PHC pile, the pile head hardware 8 is also used as a fixing hardware for fixing the PC steel material, and is provided integrally when the ready-made concrete pile member 1 is manufactured. The pile head hardware 8 also has a width corresponding to the concrete thickness of the ready-made concrete pile member 1, and the flange portion 8 a that covers the upper end surface of the ready-made concrete pile member 1, and the flange, An annular hanging portion 8b that is suspended from the outer peripheral edge of the portion 8a and a second annular flange 8c that is flush with the upper surface of the flange portion 8a and projects outward from the annular hanging portion 8b are integrally formed. When these pile head hardware 8 and SC pile hardware 9 install the connection member 6 in the pile head 1a of the ready-made concrete pile member 1, those flange parts 8a and 9a mutually contact | abut in the up-down direction. In addition to being overlaid, the annular flanges 8c and 9c are also brought into contact with each other in the vertical direction.

  The constraining hardware 10 is composed of a plurality of ring pieces, and is formed in an annular shape by sequentially connecting these ring pieces integrally around the pile head 1a. The constraining hardware 10 is formed with a width dimension straddling the SC pile hardware 9 and the pile head hardware 8 in the vertical direction, and on the inner peripheral surface side thereof, the first and second annular flanges 8c overlapped with each other vertically. , 9c are formed together to form a fitting groove 10a. As a result, the restraint hardware 10 made of ring pieces restrains the pile head hardware 8 and the SC pile hardware 9 from the vertical direction by the fitting groove 10a, and is assembled into an integral annular shape, so that these pile heads The metal part 8 and the SC pile metal part 9 are also restrained from the horizontal direction. Thereby, the ready-made concrete pile member 1 and the connecting member 6 are firmly joined in the vertical direction and the horizontal direction.

  In the connecting member 6 and the ready-made concrete pile member 1 which are integrally joined by the joining metal fitting 7 and embedded in the ground G, the concrete C2 which joins the column base 2a of the steel column 2 to the connecting member 6 is a steel tube portion. The inside of the connecting member 6 is filled from a position lower than 5. In the present embodiment, the concrete C2 is filled in the SC pile portion 4 from the position higher than the position of the joint fitting 7 to the upper opening 5a of the steel cylinder portion 5.

  Next, a preferred embodiment of a construction method for a steel-building building pile and column connection structure according to the present invention will be described in detail. As shown in FIG. 4, the construction method of the steel-frame building pile-column connection structure according to the present embodiment is basically a hollow cylindrical body placed on the ground G without using foundation beams or footings. In the construction method of a steel-frame building pile and column connection structure that connects the ready-made concrete pile member 1 and the steel column 2, the concrete C1 is integrated into the lower part of the steel pipe 3 along the inner peripheral surface in an annular shape By providing the connection member 6 having the steel cylinder portion 5 having the SC pile portion 4 in the lower portion and the column base portion 2a of the steel column 2 in the upper portion, the ready-made concrete pile member 1 is provided. To the pile head 1a of the ready-made concrete pile member 1 exposed above the ground G, and the erection work of inserting the ready-made concrete pile member 1 into the drilling hole 13 formed in the ground G. The constraining hardware 10 allows the connecting member In a state where the ready-made concrete pile member 1 and the connecting member 6 are inserted into the drilling hole 13 so that the upper end portion of the connecting member 6 is exposed from the ground G. The second step of inserting the column base 2a of the steel column 2 into the steel cylinder 5 and the concrete C2 that integrally joins the connecting member 6 and the steel column 2 to the SC above the position of the fitting 7 A third step of filling upward from the inside of the pile portion 4.

  In this embodiment, the case of the pre-boring method is shown, but the above-mentioned various methods such as the Nakabori method can be applied. The connecting member 6, the ready-made concrete pile member 1, and the joint fitting 7 described above are prepared and prepared in advance. The construction work at the site site will be described with reference to the drawings. First, the hole 13 is formed in the ground G (see (a) and (b)). Next, cement milk 14 is injected into the drilling hole 13 and, subsequently, as the ready-made concrete pile member 1, an erection operation is performed in which the PHC pile is suspended and built in the drilling hole 13 ((c) and (d)). reference). Next, in a state where the pile head 1a of the ready-made concrete pile member 1 is exposed above the ground G, a joining operation for joining the connecting member 6 to the pile head 1a via the joint fitting 7 is performed ((e)). reference). The joining work of the connecting member 6 to the pile head 1 a may be completed before the ready-made concrete pile member 1 is built in the drilling hole 13.

  Next, the ready-made concrete pile member 1 joined with the connecting member 6 is further suspended in the drilling hole 13 together with the connecting member 6, and the upper end portion of the connecting member 6 protrudes from the drilling hole 13 and is exposed to the ground G. The burying work is completed (see (f)). At this time, excess cement milk 14a overflowing into the connecting member 6 from the ready-made concrete pile member 1 is sucked and discharged (see (g)). Thereafter, the column base 2a of the steel column 2 is inserted into the steel cylinder 5 (see (h)).

  Finally, the concrete C2 that integrally joins the steel column 2 and the connecting member 6 is cast from the upper opening 5a of the steel tube portion 5, and from the inside of the SC pile portion 4 above the position of the joint fitting 7 It fills toward the upper opening part 5a of the steel cylinder part 5 (refer (i)). When the concrete C2 is hardened, the connection between the column base 2a of the steel column 2 and the connecting member 6, and the connection between the steel column 2 and the ready-made concrete pile member 1 is completed. The steel column 2 may be appropriately filled with concrete as necessary.

  In the connection structure between the pile and the pillar of the steel structure according to the present embodiment described above, the SC is previously applied to the pile head 1a of the ready-made concrete pile member 1 in place of the single-piece steel pipe as in the background art. The connecting member 6 provided with the pile portion 4 is joined, and the structure strength around the column base portion 2a is remarkably improved by the SC pile portion 4 while being in the same form in which the steel pipe material 3 is filled with the concrete C2. The bending moment generated in the steel column 2 due to an earthquake or the like can be efficiently supported by the connecting member 6. In addition, the column base 2a is disposed in the steel cylinder portion 5 of the connecting member 6, while the connecting member 6 and the ready-made concrete pile member 1 are separated by a distance corresponding to the length of the SC pile portion 4. Since it joins in position, it can prevent that the stress which arises between the column base part 2a and the connection member 6 acts on the connection part of the connection member 6 and the ready-made concrete pile member 1 directly, The stress which arises can be reduced and the joint strength of the ready-made concrete pile member 1 and the connection member 6 can be improved.

  In addition, since the column base 2a is arranged in the steel cylinder portion 5, even the connecting member 6 including the SC pile portion 4 can smoothly insert the column base 2a into the connecting member 6. It can be carried out. Moreover, the supporting pressure which supports a building load is reliably ensured by the level | step-difference part 4a of the SC pile part 4 upper end separated from the joining position of the connection member 6 set to the lower end part of the SC pile part 4, and the ready-made concrete pile member 1. Can be generated. And since the concrete C1 of the SC pile part 4 is located just on the ready-made concrete pile member 1, the static load of the building 12 can be reliably transmitted to the ready-made concrete pile member 1 and supported.

  Further, the concrete member C2 for integrally joining the connecting member 6 and the steel column 2 is filled into the connecting member 6 from a position lower than the steel tube portion 5, and a steel tube portion equivalent to a steel pipe of the background art. Compared to filling only concrete 5 with concrete C2, it is possible to secure a support region for the steel column 2 by the concrete C2 in a wider range from a lower position than the steel tube portion 5, and these steel column 2 and the connecting member 6 can be secured. The integrity of the can be improved. In particular, by filling the concrete C2 upward from the inside of the SC pile portion 4 above the position of the joint fitting 7, the amount of concrete used can be reduced while sufficiently securing structural integrity. Furthermore, since the ready-made concrete pile member 1 and the connecting member 6 are joined by the joint fitting 7 which is a mechanical joint, the work is complicated, and unlike the case of welding joining which requires non-destructive inspection, etc. In addition to improving the reliability of the part, it is possible to improve the joining workability, shorten the work period, reduce the cost, and the like.

  Moreover, in the construction method of the connection structure between the pile and the pillar of the steel building according to the present embodiment, the connecting member 6 is made of the ready-made concrete pile member 1 so that the periphery of the upper end portion of the connecting member 6 is exposed from the ground G. At the same time, the column base 2a is inserted into the steel cylinder 5 while being inserted into the drilling hole 13, and then filled with concrete C2 upward from the inside of the SC pile 4 above the position of the joint fitting 7. Since it was made to do, the connection structure mentioned above can be constructed smoothly.

  FIG. 6 shows a modification of the above embodiment. In this modified example, instead of filling concrete C2 that integrally joins the connecting member 6 and the steel column 2 from the inside of the SC pile portion 4 above the position of the joint metal 7, the joint metal 7 It is made to fill upward from the inside of the ready-made concrete pile member 1 below the position. If it does in this way, since concrete C2 is filled also into the SC pile part 4 whole and also the joint metal fitting 7 periphery, the structural cooperation effect | action of the connection member 6 and the ready-made concrete pile member 1 can be improved. The strength of the joint portion between the ready-made concrete pile member 1 and the connecting member 6 can be improved, and the overall structural strength from the steel column 2 to the ready-made concrete pile member 1 can be further increased.

  Moreover, in the said embodiment, although the lower end part 6a of the connection member 6 and the pile head 1a of the ready-made concrete pile member 1 were joined by the mechanical joining metal fitting 7 which has the restraint metal object 10, SC The pile part hardware 9 and the pile head hardware 8 may be joined by welding.

It is a sectional side view showing one suitable embodiment of the connection structure of the pile and pillar of a steel-frame building concerning the present invention. It is a schematic perspective view of the ready-made concrete pile member shown in FIG. 1, and a connection member. It is a principal part expansion schematic of the junction part of the ready-made concrete pile member shown in FIG. 1, and a connection member. It is process drawing which shows suitable one Embodiment of the construction method of the connection structure of the pile and pillar of a steel-frame building concerning this invention. It is a schematic perspective view which shows the foundation part of the steel structure building to which the connection structure of the pile and pillar of the steel structure building concerning this invention is applied. It is a sectional side view which shows the modified example of the connection structure of the pile and pillar of a steel-frame building concerning this invention, and its construction method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ready-made concrete pile member 1a Pile head 2 Steel column 2a Column base part 3 Steel pipe material 4 SC pile part 5 Steel cylinder part 6 Connection member 6a Lower end part of a connection member 7 Joining metal fitting 8 Pile head hardware 9 SC pile part hardware 10 Restraint hardware 13 Drilling hole G Ground C1 Concrete C2 Concrete

Claims (6)

Without using foundation beams and footings, in the connecting structure of piles and pillars of steel-framed buildings that connect hollow cylindrical tubular ready-made concrete pile members and steel columns placed in the ground,
A steel cylinder part in which the SC pile part is formed in the lower part and the column base part of the steel column is arranged in the upper part by providing concrete in a ring shape along the inner peripheral surface at the lower part of the steel pipe member. Formed on the pile head of the ready-made concrete pile member, and integrally connecting the connecting member embedded in the ground, the lower end of the connecting member and the pile head of the ready-made concrete pile member With joint fittings,
A structure for connecting a pile and a pillar of a steel building, wherein concrete for integrally joining the connecting member and the steel column is filled in the connecting member from a position lower than the steel cylinder portion. .   The joint fitting is provided at a pile head hardware provided at a pile head of the ready-made concrete pile member, and at a lower end portion of the SC pile portion of the connection member, and is superimposed on the pile head hardware from above and below. The pile of the steel-frame building of Claim 1 comprised from SC pile part hardware and the restraint hardware which restrains these pile head hardware and SC pile part hardware from an up-down direction and a horizontal direction, Column connection structure.   The concrete for integrally joining the connecting member and the steel column is filled upward from the inside of the SC pile portion above the position of the joint fitting. Connection structure between piles and pillars in a steel-frame building.   3. The concrete for integrally joining the connecting member and the steel column is filled upward from the inside of the ready-made concrete pile member below the position of the joint fitting. Connection structure of piles and pillars of the steel building described. In the construction method of the pile-column connection structure of a steel structure building that connects a prefabricated concrete pile member in the form of a hollow cylinder placed on the ground and a steel column without using foundation beams and footings,
A steel tube portion having an SC pile portion at the lower portion and a column base portion of the steel column is disposed at the upper portion by integrally providing concrete in a ring shape along the inner peripheral surface of the lower portion of the steel pipe material. Create a connecting member with the above-mentioned ready-made concrete pile member,
The connecting member is integrated into the pile head of the prefabricated concrete pile member exposed above the ground through the fitting work by inserting the prefabricated concrete pile member into the drilling hole formed in the ground. A first step of performing a joining operation for jointly,
Insert the column base of the steel column into the steel cylinder with the ready-made concrete pile member and the connecting member inserted into the drilling hole so that the upper end of the connecting member is exposed from the ground A second step of
A steel structure comprising: a third step of filling the connecting member and the steel column integrally with concrete from above the SC pile portion above the position of the joint metal fitting upward. Construction method for building pile and pillar connection structure.   In place of filling the concrete from the inside of the SC pile portion above the joint bracket position, the third step is upward from the inside of the ready-made concrete pile member below the joint metal position. The construction method of the connection structure of a pile and a column of a steel structure building according to claim 5, wherein concrete is filled in the direction.

Images