JP2006009258A - Column-beam joining structure, construction method of column-beam joining structure, construction method of underground structure and building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a column-beam joining structure, a construction method of the column-beam joining structure, a construction method of an underground structure, and a building, capable of forming the column-beam joining structure by easy joining such as pin joining. <P>SOLUTION: This invention is a method for constructing the column-beam joining structure 2 having a strut 20 forming a permanent beam of the underground structure X for supporting an earth retaining wall 10, and a column 12 joined to the strut 20. In this invention, after driving the column 12 in the ground, the strut 20 is extended and easily joined between these columns 12, and a concrete permanent column 30 is formed so that the column 12 is embedded, and a capital part 34 overhanging to the outer peripheral side of the permanent column 30, is integrally formed with the permanent column 30 so that a joining part 100 of the column 12 and the strut 30 is embedded. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a column beam joint structure, a method for constructing a column beam joint structure, a construction method for an underground structure, and a building, and in particular, a column beam capable of making the column beam joint structure a simple joint such as a pin joint. The present invention relates to a joint structure, a method for constructing a column beam joint structure, a method for constructing an underground structure, and a building.
To do.

Conventionally, for example, when constructing an underground structure, a retaining wall is provided in order to prevent the surrounding ground from collapsing, and the temporary retaining beam is stretched between the opposing retaining walls through a bellows. Has been done to support. Since this temporary beam only needs to bear the axial force applied from the retaining wall, in general, a simple connection such as a pin connection is made at the junction between the flank and the temporary beam. Adopted. However, since the above-mentioned cut beam is a temporary member, it must be removed after constructing the main beam, which takes time and cost. Thus, for example, Patent Document 1 discloses a method of using a cut beam as a main beam without using a temporary cut beam. According to this method, since the cut beam is a main beam, there is an advantage that it is not necessary to remove the cut beam later, and labor and cost can be reduced.
JP-A-1-271558

However, in the method of using the cut beam as the main beam as described above, the column beam connection portion must bear not only the axial force but also the bending load. There is a problem that the construction of the beam-column joint becomes complicated.
Such a problem occurs not only when the above-described underground structure is constructed, but also when a ground structure is constructed. That is, also in the structure on the ground, the column beam connection portion between the column and the beam needs to be rigidly connected so as to bear a shearing force and a bending load in addition to the axial force. This is because the construction of the beam-column joint becomes complicated as in the case.

  An object of the present invention is to provide a column beam joint structure, a method for constructing a column beam joint structure, a method for constructing an underground structure, and a building capable of making the column beam joint structure a simple joint such as a pin joint. It is in.

  The present invention is a column beam connection structure including a beam of a building and a column bonded to the beam, and projects to the outer peripheral side of the column so that a junction between the column and the beam is embedded. It is characterized by having a capital part. Here, the beam may be H-shaped steel or precast concrete.

  According to the present invention, by providing the capital part on the outer periphery of the column, the position of the fixed end of the beam becomes the tip part of the capital part. Therefore, when an equally distributed load acts on the beam, the tip part of the capital part A large moment acts on the column, and the moment acting on the column-beam joint is kept small. For this reason, the joining part of a pillar and a beam can be made into simple joining, such as pin joining. For this reason, the column beam joint can be easily constructed.

  The present invention is a column beam joining structure comprising a permanent beam also used as a beam supporting a retaining wall, and a column bonded to the beam, and is a concrete book in which the column is embedded. A capital part is formed integrally with the installation pillar, and is extended to the outer peripheral side of the installation pillar so that the joint between the support pillar and the installation beam is embedded. Here, the main beam may be H-shaped steel or precast concrete. The concrete includes reinforced concrete, steel concrete, steel reinforced concrete, and the like.

  According to the present invention, by providing the capital part on the outer periphery of the main pillar, the position of the fixed end of the main beam becomes the tip of the capital part. A large moment acts on the tip of the capital portion, and the moment acting on the joint between the support column and the main beam is kept small. For this reason, the joint part of a support | pillar and this installation beam can be made into simple joinings, such as pin joining, and a column beam joining part can be built easily. In addition, since the cut beam that supports the retaining wall is used as a permanent beam, the cut beam becomes a permanent beam, and therefore it is not necessary to remove the cut beam later.

  The present invention relates to a method for constructing a column beam connection structure that includes a beam of a building and a column bonded to the beam, and is simply provided by spanning the beam between the columns. A capital portion is formed integrally with the pillar so as to be joined and projecting to the outer peripheral side of the pillar so that a joint portion between the pillar and the beam is buried.

  The present invention is a method for constructing a column beam joint structure for constructing a column beam joint structure comprising a permanent beam that is also used as a cutting beam that supports a retaining wall, and a pillar that is joined to the permanent beam, The permanent beam is bridged between the struts driven into the ground and simply joined, a concrete permanent pillar is formed so that the strut is buried, and the strut and the permanent beam are joined. A capital portion projecting to the outer peripheral side of the permanent column is formed integrally with the permanent column so that the portion is embedded.

  The present invention is a method for constructing an underground structure having a column beam connection structure having a main beam also used as a beam supporting a retaining wall, and a column bonded to the beam. A strut driving step for driving the ground into the ground, a root cutting step for excavating a construction site of the underground structure, a permanent beam joining step for simply joining the permanent beam between the struts, A permanent pillar forming step of forming a concrete pillar made of concrete for embedding the pillar; and a capital portion protruding to the outer peripheral side of the permanent pillar so that a joint portion between the pillar and the permanent beam is buried. And an integral forming step of forming integrally with the main pillar.

  The building of this invention is equipped with the said beam-column joining structure, It is characterized by the above-mentioned.

  According to the present invention, there is an effect that the column beam connection structure can be a simple connection such as a pin connection.

[First Embodiment]
Hereinafter, the building provided with the column beam connection structure concerning a 1st embodiment of the present invention is explained based on a drawing. Drawing 1 is a longitudinal section showing underground structure X of building 1 concerning this embodiment. FIG. 2 is an enlarged longitudinal sectional view showing a portion A of FIG. FIG. 3 is a longitudinal cross-sectional view showing a structure obtained by removing a later-described capital portion from FIG. FIG. 4 is a plan view of the part shown in FIG. 3 as viewed from above.

  As shown in FIG. 1, a building 1 has an underground structure X and a ground structure Y, and is constructed by the following procedure. First, a retaining wall 10 is formed around the ground G on which the building 1 is constructed, and a plurality of pillars 12 made of H-shaped steel are driven inside the retaining wall 10 (a pillar driving process), and the ground G surrounded by the retaining wall 10. Is first excavated (root cutting process). Next, the steel column 14 of the ground structure Y is provided on the upper part of the support column 12, and a steel beam 16 made of, for example, steel is attached between the steel columns 14, and this beam 16 is used as a main beam of the ground structure Y. The floor concrete 18 which comprises the floor of the 1st floor is formed in the upper part of the beam 16 using it. Thereafter, in parallel with the construction of the ground structure Y, the underground structure X is constructed by the following procedure.

  First, the ground G surrounded by the retaining wall 10 is secondarily excavated while supporting the retaining wall 10 by the cutting beam 16 (root cutting process). Next, for example, an H-shaped steel beam 20 that also serves as a main beam constituting the underground first floor portion of the underground structure X is bridged between adjacent columns 12, and the column 12 and the beam 20 are joined by pins, for example. To simply join (main beam joining process). Specifically, as shown in FIG. 3, the beam 20 is supported by an angle member 24 attached to the flange surface of the column 12 with a bolt 22 or the like, and the flange surface of the column 12 and the end of the beam 20 are connected to each other. Join by welding.

  Next, as shown in FIG. 1, the ground G surrounded by the retaining wall 10 is third-excavated (root cutting process) while supporting the retaining wall 10 by the cut beam 20, and the floor 26 on the second basement floor made of reinforced concrete. And form the foundation 28. Next, as shown in FIG. 2, after the reinforcing bars 13 are arranged around the pillars 12, the reinforced concrete main pillars 30 for embedding the pillars 12 are formed to the level of the first basement (main pillar forming process). . Next, the reinforcing bars are arranged at predetermined positions so that the joints between the columns 12 and the beam 20 are embedded, and then the floor 32 on the first basement floor supported by the beam 20 and the outer periphery from the main column 30 The capital portion 34 projecting to the side and the main pillar 30 are integrally formed of concrete (integral forming step). The capital portion 34 is formed in a rectangular shape (FIG. 4) in plan view so as to cover the reinforcing bars after passing the reinforcing bars through the reinforcing bar 20A (FIG. 3) formed in the end portion of the cut beam 20. Has been. Further, as shown in FIG. 2, the capital portion 34 is formed so that the thickness dimension thereof is smaller than that of the cut beam 20.

In this way, a column beam including the main column 30 for embedding the column 12 that is simply joined to the cut beam 20 to be the main beam, and the capital portion 34 formed integrally with the main column 30. A junction structure 2 is constructed.
Next, as shown in FIG. 1, the outer peripheral wall 36 of the second basement made of concrete joined to the mountain retaining wall 10 is formed, and a structure on the basement side from the first basement level is constructed.

Next, in the same manner as described above, after the reinforcing bars are arranged around the pillars 12, the reinforced concrete main pillars 30 for embedding the pillars 12 are formed to the level of the first floor above the ground (main pillar forming step), and the underground 2 On the upper side of the outer peripheral wall 36 of the floor, an outer peripheral wall 38 of the first basement floor made of concrete joined to the mountain retaining wall 10 is formed. In this way, the underground structure X is constructed.
As described above, the building 1 including the underground structure X and the ground structure Y is constructed.

Next, moments applied to the beam-column joint 100 between the column 12 and the cut beam 20 and the joint 110 between the steel column 14 and the beam 16 will be described.
FIG. 5 is a moment diagram when an equally distributed load is applied to the cut beam 16 when the capital portion 34 is not provided. FIG. 6 is a moment diagram when an equally distributed load is applied to the cut beam 16 when the capital portion 34 is provided. As shown in FIG. 5A, a capital portion 34 (shown virtually in FIG. 5) is provided at the joint 110 of the steel column 14 and the beam 16 constituting the first floor portion of the building 1. In the case where there is no load, when a uniformly distributed load is applied to the cut beam 16, a moment shown in FIG. 5B acts on the cut beam 16. As can be seen from such a moment diagram, since a large moment acts on the joint 110 between the steel column 14 and the cut beam 16, the joint 110 must be rigidly joined.

  On the other hand, as shown in FIG. 6 (A), when the capital portion 34 is provided in the column beam joint portion 100 between the support column 12 and the cut beam 20 in the underground first floor portion constituting the underground structure X, Since the position of the fixed end (end portion) of the cut beam 20 is the tip end portion 34A of the capital portion 34, when an equally distributed load is applied to the cut beam 20, the moment shown in FIG. Works. According to such a moment diagram, a large moment acts on the tip portion 34A of the capital portion 34, but the moment acting on the column beam joint portion 100 between the support column 12 and the cut beam 20 is kept small. For this reason, even if the column beam joint portion 100 between the support column 12 and the cut beam 20 is constructed as a relatively simple structure such as a pin joint, sufficient rigidity can be secured to the column beam joint portion 100.

The present embodiment has the following effects.
(1) By providing the capital portion 34 on the outer periphery of the main column 30, the position of the fixed end of the cut beam 20 becomes the tip portion 34 </ b> A of the capital portion. A large moment acts on the tip portion 34A of the capital portion 34, and the acting moment on the column beam joint portion 100 between the support column 12 and the cut beam 20 is kept small. For this reason, the column beam junction part 100 of the support | pillar 12 and the cut beam 20 can be made into simple junctions, such as pin junction, and the column beam junction structure 2 can be built easily.

  (2) Since the cut beam 20 is used as a main beam, it is not necessary to remove the cut beam 20 later, and labor and cost for constructing the underground structure X can be reduced.

  (3) Since earth pressure and water pressure from the ground G are applied in the axial direction of the cut beam 20 through the mountain retaining wall 10 and the outer peripheral wall 36, a compressive force is applied to the cut beam 20. For this reason, a prestressed effect is added to the cut beam 20, and the cut beam 20 can bear a long-term moment, so that the rigidity of the cut beam 20 is improved.

  (4) Since the column beam connection structure 2 including the cut beam 20 and the capital part 34 is adopted in the first basement part of the underground structure X, the first basement floor is formed only by the capital part as in the conventional flat slab structure. Compared to the case where the floor 32 is supported, the size of the capital portion 34 and the thickness of the floor 32 on the first basement floor can be reduced. Thereby, the quantity of the concrete used for the capital part 34 or the floor 32 of the 1st basement floor, and the effort at the time of formation can be reduced.

[Second Embodiment]
Next, a column beam housing structure according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is an enlarged longitudinal sectional view showing the column beam joint structure 3 according to a modification of the present invention. As shown in FIG. 7, the beam-column joint structure 3 is mainly different from the beam-column joint structure 2 in that the cut beam 40 is made of precast concrete. For this reason, this difference will be mainly described below.

  The column beam connection structure 3 is constructed as follows. First, the beam 40 is supported by an angle member 44 attached to the flange surface of the column 12 made of H-shaped steel with bolts 42 and the like, and the gap between the flange surface of the column 12 and the beam 40 is filled with the grout material 46 and the like. The column beam joint 120 between the column 12 and the cut beam 40 is configured with a relatively simple structure (main beam joining step). Subsequently, the reinforcing bar 48 is disposed at a predetermined position so that the joint between the support column 12 and the beam 40 is buried, and then the floor 32 on the first basement floor supported by the beam 40 and the main pillar 30 are used. The capital part 34 projecting to the outer peripheral side and the main pillar 30 are integrally formed of concrete (integral forming step). At this time, an anchor material (not shown) is installed between the beam 40 and the capital part 34 in order to securely connect the beam 40 and the capital part 34. In this way, the beam-column joint structure 3 is constructed. According to such 2nd Embodiment, there can exist an effect similar to the said 1st Embodiment. In addition, you may use the precast concrete which applied the prestressed to the reinforcing bar 48 for the cut beam 40, In this case, the rigidity of the cut beam 40 can be improved, compared with the case of the conventional flat slab structure. The size of the capital part 34 can be reduced.

  In addition, this invention is not limited to the said embodiment. In each said embodiment, although H-shaped steel was employ | adopted for the support | pillar 12, you may employ | adopt not only this but a steel pipe concrete other support | pillar, for example. Moreover, the structure of the cut beams 20 and 40 is not limited to the H-shaped steel or the precast concrete. Further, in each of the above embodiments, the beam of the cut beams 20 and 40 is configured to be larger than the thickness dimension of the capital portion 34, but the dimension is not particularly limited. Moreover, in each said embodiment, although the beam-column junction part 100,120 was applied to the underground structure X, you may apply to the structure of a ground floor. In this case, it is only necessary to construct the column beam joint so that the cut beams 20 and 40 are not used as cut beams but only as building beams. Moreover, in each said embodiment, although the structure supported by the angle materials 24 and 44 was employ | adopted as simple joining of the support | pillar 12 and the cut beams 20 and 40, it is not restricted to this, For example, simple, such as pin joining Can be used.

It is a longitudinal section showing an underground structure of a building provided with a beam-column joining structure concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view which expands and shows the A section of FIG. It is a longitudinal cross-sectional view which shows what removed the capital part from FIG. It is the top view which looked at the part shown in FIG. 3 from upper direction. It is a moment figure at the time of an equally distributed load being added to this installation beam, when a capital part is not provided. It is a moment diagram when an equally distributed load is applied to the main beam when a capital part is provided. It is a longitudinal cross-sectional view which expands and shows the column beam junction structure which concerns on the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2, 3 Column-beam connection structure 10 Mountain retaining wall 12 Posts 20, 40 Cutting beam used as a main beam 22, 42 Bolt 24, 44 Angle material 30 Main column 32 Floor 34 Capital part 34A Tip part 36, 38 Outer wall 100,120 Beam-column joint G Ground X Underground structure Y Ground structure

Claims (6)

A column beam connection structure comprising a beam of a building and a column bonded to the beam,
A column-beam joint structure comprising a capital portion projecting toward an outer peripheral side of the column so that a joint portion between the column and the beam is embedded. A beam-to-column connection structure comprising a permanent beam also used as a beam supporting the retaining wall, and a post bonded to the permanent beam,
A capital portion that is formed integrally with a concrete main pillar in which the pillar is embedded and projects to the outer peripheral side of the main pillar so that a joint between the pillar and the main beam is embedded. A column beam connection structure characterized by comprising. A method for constructing a beam-to-column connection structure for building a beam-to-column connection structure including a beam of a building and a column bonded to the beam,
The beam is bridged between the columns and simply joined,
A method for constructing a column-beam joint structure, wherein a capital portion projecting toward an outer peripheral side of the column is formed integrally with the column so that a joint portion between the column and the beam is embedded. A method for constructing a column beam joint structure comprising a main beam also used as a beam supporting a retaining wall, and a column beam joint structure comprising a pillar joined to the permanent beam,
The main beam is spanned between the struts driven into the ground and simply joined,
Form concrete pillars made of concrete so that the pillars are buried,
A column beam joint structure characterized in that a capital portion projecting to the outer peripheral side of the permanent pillar is integrally formed with the permanent pillar so that the joint portion of the pillar and the permanent beam is embedded. How to build. A method for constructing an underground structure comprising a column beam connection structure having a permanent beam also used as a beam supporting a retaining wall and a column bonded to the permanent beam,
A strut driving process for driving the strut into the ground;
A root cutting process for excavating the construction site of the underground structure;
A permanent beam joining step in which the permanent beam is spanned between the columns and simply joined;
A permanent pillar forming step of forming a concrete permanent pillar made of concrete embedding the pillar;
And an integral forming step of integrally forming a capital portion projecting to the outer peripheral side of the permanent column so as to embed a joint portion of the column and the permanent beam. The construction method of the underground structure. A building comprising the beam-column joint structure according to claim 1.

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