JP4969909B2 - Construction method of structure - Google Patents

Description

  The present invention relates to a construction method for a structure composed of a plurality of column members and beam members, and in particular, enables efficient construction by increasing the size of the column members and beam members. For example, a column member made of precast concrete and It is applied to the construction of RC structures consisting of beam members.

  As a construction method for RC structures constructed in multiple layers and spans, a construction method is known in which both column members and beam members are formed from precast concrete, and these column members and beam members are assembled sequentially to construct the entire building. It has been.

  This construction method has almost no on-site formwork, reinforcement work, and concrete work, and because the structure is built mainly by joining only the members, it is possible to greatly reduce the labor and improve the construction accuracy. There are benefits.

JP 2004-316322 A

  However, since all of the conventional column members and beam members are formed in a length corresponding to one layer and one span, the number of members and joints are very large. However, there has been a problem that joining work is greatly increased, the burden is increased in terms of process and cost, and the construction tends to be complicated.

  The present invention has been made to solve the above-described problems, and provides a construction method for a structure that can significantly increase the efficiency of construction on site and shorten the construction period by increasing the size of column members and beam members. For the purpose.

In the construction method of a structure according to claim 1, the column member is formed to a length of two layers of the structure, the beam member is formed to a length of two spans of the structure, and the column member is a center of the beam member. The beam member spans the center between the column members, the lower end of the column member is on the upper side of the beam member, the upper end of the column member is on the lower side of the beam member, and both ends of the beam member are In a construction method for constructing a structure having a plurality of layers and a plurality of spans from a plurality of column members and a plurality of beam members by being joined to the side portions of the column members, the structure is projected at the upper end of the column member. The joint rebar is passed through a through-hole provided in the center of the beam member, and is inserted into a joint sheath embedded in a lower end portion of a column member located above the beam member, and the through-hole and The beam member and the upper and lower sides of the beam member are filled by filling the joint sheath with a solidifying material. The column members located in the column members are joined to each other, and the joint reinforcing bars projecting from the intermediate portion of the column members and the joint reinforcing bars projecting from the end portions of the beam members are joined through the joint sheath. In addition, the column member and the beam members positioned on both sides of the column member are joined to each other by placing concrete around the periphery.

  In particular, the present invention makes it possible to greatly reduce the total number of column members and beam members and the total number of joints by increasing the size of the column members and beam members, thereby greatly reducing labor and shortening the construction period. Therefore, it is suitable for the construction of an RC structure capable of forming a large member relatively easily.

  In constructing a structure constructed of a plurality of layers and a plurality of spans, the present invention uses a column member having a length corresponding to two layers and a beam member having a length corresponding to two spans. Since the total number of members and the total number of joints can be greatly reduced, it is possible to achieve a significant labor saving and shortening of the construction period for on-site construction.

  Further, by arranging column members on the same floor every other span, it is possible to make the number of members uniform on each floor and improve the construction accuracy.

  In addition, the column member and beam member are joined on the side of the column member and the upper and lower sides of the beam member while avoiding the so-called panel zone, so that the column on the upper floor is built during the construction of the floor. There is a merit that it can be done, and efficient construction becomes possible.

  1 to 4 show an RC structure construction method according to the present invention method. In this method, in order to construct a multi-layer / multi-span structure as shown in FIG. Column members and beam members as shown in FIGS.

  The column member 1 is formed to have a length corresponding to two layers of the structure described above, and the beam member 2 is formed to have a length corresponding to two spans, both of which are formed of precast concrete.

  A plurality of joint reinforcing bars 3 project from the upper end portion of the column member 1, and the same number of joint sheaths 4 as the joint reinforcing bars 3 are embedded at the lower end portion. The joint rebar 5 and the joint rebar 6 are respectively projected.

  The joint rebar 3 is a joint for integrally joining the upper end portion of the column member 1 to the beam member 2 and the column member 1 immediately above the column member 1, and the joint rebar 3 is provided in the column member 1. It is formed by extending the upper end portion of the arranged main reinforcement longer than the length corresponding to the beam formation of the beam member 2.

  The joint sheath 4 is embedded on the same axis gland as the main muscles arranged in the column member 1, and is integrally connected to the lower end of each main muscle.

  The joint reinforcing bars 5 are joints for joining the end portions of the beam member 2 to the side portions of the column member 1, respectively, and are provided with a predetermined length symmetrically on both sides of the column member 1. In this case, as a method of arranging the joint reinforcing bars 5, a method of arranging the bars so as to penetrate horizontally through the middle portion of the column member 1 and project both ends symmetrically on both sides of the column member 1 for a predetermined length; Any of the methods of arranging the bars so as not to penetrate the intermediate part of the pillar member 1 and to protrude separately on both side parts of the pillar member 1 may be used.

  The joint rebar 6 is a joint for joining the end portion of the floor slab (not shown) to the side portion of the column member 1, and protrudes horizontally inside the column member 1.

  On the other hand, a web portion 2 a and a plurality of joint rebars 7 project from both ends of the beam member 2, and a plurality of joint rebars 8 project from the inner side of the beam member 2. The web 2a is a part of the beam member 2, and is a portion that is also used as a concrete formwork particularly when the end of the beam member 2 is joined to the side of the column member 1 (see FIG. 3B). ).

  The joint rebar 7 is a joint for joining the end portion of the beam member 2 to the side portion of the column member 1, and by projecting the end portion of the main bar arranged in the beam member 2 to a predetermined length. Is formed. The joint reinforcing bars 8 are joints for joining a floor slab (not shown) to the side portion of the beam member 2, and a plurality of the reinforcing bars 8 are provided to project over the entire length of the beam member 2 in the axial direction.

  Furthermore, a joint portion 9 having the same cross-sectional diameter and the same dimensions as the column member 1 is formed at the center of the beam member 2, and a plurality of through holes 9 a through which the joint rebar 3 of the column member 1 penetrates the joint portion 9. Is formed vertically. In addition, a plurality of joint reinforcing bars 8 project from the side portion of the joint portion 9.

  Next, the construction method of the present invention will be described with reference to FIG. 4. A column member 1A is newly erected at the center of each beam member 2A on the top floor already assembled in the previous step. In this case, each column member 1 </ b> A is erected on the joint portion 9. Further, as illustrated in FIG. 3A, the joint sheath 4 embedded in the lower end portion of the column member 1 </ b> A penetrates the through hole 9 a of the joint portion 9, and The upper end portions of the joint reinforcing bars 3 projecting from the upper end portions are respectively inserted.

  Then, by filling the joint sheath 4 and the through hole 9a of the joint portion 9 with a solidifying material such as mortar, the upper end portion of the beam member 2A and the column member 1B positioned below the beam member 2A. And the lower end of the column member 1A located on the upper side of the beam member 2A are integrally joined to each other. In this construction method, column members 1 on the same floor are erected every other span. That is, in FIG. 4, each pillar member 1A is erected every other span.

  Next, the beam member 2C on the upper floor is bridged between the column members 1A and 1A erected in this way. In this case, the beam member 2C is hung horizontally by the crane 10 and dropped horizontally into the center between the column members 1A and 1A.

  Then, the joint rebars 7, 7 at both ends are opposed to the joint rebars 5, 5 projecting from the side portions of the column members 1A, 1A on both sides erected in the previous step, and the center joint 9 is formed. It is placed on the upper end of the intermediate column member 1B erected in the previous step. When the central joint portion 9 is placed on the upper end portion of the column member 1B, the joint reinforcing bars 3 projecting from the upper end portion of the column member 1B are passed through the through holes 9a of the joint portion 9 to form the joint portion. Project at the upper end of 9.

  Next, both end portions of each beam member 2C are integrally joined to the side portions of the column members 1A and 1A. In this case, for example, as illustrated in FIG. 3B, each joint rebar 5 projecting from the side of each column member 1 </ b> A and each joint rebar 7 projecting from the end of each beam member 2. Are joined by a joint sheath 11 or the like, shear reinforcement bars 12 are arranged around them, and a mold frame member 13 is arranged on the opposite side and the bottom of the web 2a so that the mold frame member 13 and the web 2a The concrete formwork is formed, and the concrete 14 is placed in the formwork, whereby the ends of the beam members 2C are integrally joined to the side parts of the column members 1A. The formwork 13 is removed later.

  Next, a precast concrete board or the like (not shown) that also serves as a floor formwork is laid inside the pillar member 1A and the beam member 2C thus assembled, and a floor reinforcing bar (not shown) is arranged thereon, And concrete is cast and a floor slab integrated with the column member 1 and the beam member 2 is constructed.

  In the same manner, all the floors can be constructed very efficiently by axially assembling the column members 1 and beam members 2 on each floor and constructing the floor slab.

  The present invention relates to a multi-layer / multi-span RC structure composed of a plurality of column members and a plurality of beam members, and a column member formed to a length of two layers of the structure and two spans of the structure. By using a beam member formed to a length of a minute, it can be constructed very efficiently.

It is a front view which shows the RC structure in the middle of construction by the construction method of the present invention. The column member and beam member which are used by the construction method of this invention are shown, (a) is a perspective view of a column member, (b) is a perspective view of a beam member. (A) is a longitudinal sectional view showing a method of joining the end portions of the upper and lower floor column members to the upper and lower portions of the beam member, and (b) joins the end portions of the beam member to the side portions of the column member. It is a cross-sectional view which shows the method to do. It is a perspective view which shows the construction method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Column member 2 Beam member 3 Joint reinforcement 4 Joint sheath 5 Joint reinforcement 6 Joint reinforcement 7 Joint reinforcement 8 Joint reinforcement 9 Joint part 10 Crane 11 Joint sheath 12 Shear reinforcement 13 Formwork material 14 Concrete

Claims (1)

The column member is formed to the length of two layers of the structure, the beam member is formed to the length of two spans of the structure, the column member is built at the center of the beam member, and the beam member is the center between the column members The lower end of the column member is joined to the upper side of the beam member, the upper end of the column member is joined to the lower side of the beam member, and both ends of the beam member are joined to the side of the column member. In the construction method of a structure in which a multi-layered / multi-span structure is constructed from a plurality of beam members and a plurality of beam members, a joint reinforcing bar protruding from the upper end of the column member is provided at the center of the beam member. And penetrating through the formed through-hole, and inserting it into the joint sheath embedded in the lower end of the column member located above the beam member, and filling the through-hole and the joint sheath with a solidifying material. Column members positioned on the upper side and the lower side of the beam member and the beam member The joint reinforcing bars projecting from the intermediate part of the column member and the joint reinforcing bars projecting from the end of the beam member are joined to each other via the joint sheath, and around the joint reinforcing bars. A construction method for a structure, characterized in that the pillar member and the beam members located on both sides of the pillar member are joined to each other by placing concrete.

Images