JP2018178540A - Reinforcement structure and reinforcement unit set of reinforced concrete foundation slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing bar arrangement structure capable of efficiently arranging a reinforced concrete foundation slab by a simple operation. SOLUTION: A first slab muscle unit 4 in which a first slab muscle 41 is held at a constant interval by a first stop muscle 42 and a second slab muscle 51 orthogonal to the first slab muscle 41 are arranged for the foundation slab. The second slab muscle unit 5 is held at regular intervals by the second stop bar 52, and the slab muscle fixing unit 6 for fixing the ends of the slab muscle units 4 and 5 to the foundation beam portion is used. .. The slab muscle fixing unit 6 is a unit in which the bending muscle 61 is held at regular intervals by the third stop bar 62. Reinforcing bar units can be used to realize highly practical foundation slab reinforcement work. [Selection diagram] Fig. 1

Description

  The present invention relates to a reinforcement structure of a reinforced concrete foundation slab such as a house constructed using a reinforcing bar unit for foundation slab reinforcement.

  In reinforced concrete foundation slabs, the slab bars are arranged at regular intervals in the short side direction and the long side direction at the foundation slab placement site, and their intersections are bound by tie lines to form a grid-like slab arrangement structure Is built. Patent Literatures 1 and 2 propose a slab reinforcement structure.

  In Patent Document 1, in order to easily carry out the laying operation of the slabs, the slab reinforcements having grooves at regular intervals are disposed at the four corners, and the slab reinforcements are disposed in the grooves of the slab reinforcements. The horizontal and vertical slabs are arranged in a grid. In Patent Document 2, holes are formed in a flexible band-like reinforcing bar holding material at regular intervals, and through these holes, reinforcing bars (slab bars) of a predetermined length are passed through to produce an interdigitated reinforcing bar unit.

JP 2007-327193 A Japanese Patent Application Laid-Open No. 6-57882

  In the reinforcement method described in Patent Document 1, the slab muscle support must be separately manufactured and installed on the site. Also in the arrangement method of Patent Document 2, since it is necessary to manufacture a reinforcing bar holding member of a special structure and insert a slab bar into each hole of the reinforcing bar holding member, the interdigitated reinforcing bar unit is not practical. Further, in these documents, attention is not paid to the reinforcement structure for the fixed portion of the slab muscle end on the side of the foundation beam and the efficiency of the reinforcement operation.

  The object of the present invention is to provide a reinforcement structure of a reinforced concrete foundation slab capable of simply and efficiently arranging the reinforcement of slabs according to the situation of the site without using special members, and this reinforcement structure Providing a set of rebar units for

  The reinforcement structure of the reinforced concrete foundation slab according to the present invention comprises the first slab reinforcement unit, the second slab reinforcement unit, and the securing lengths of the first and second slab reinforcement units to the foundation beam side concrete. It comprises a slab muscle fixing unit.

  The first slab unit is arranged in a direction intersecting the first slab line with a plurality of first slab lines arranged in parallel at predetermined intervals on the same plane, and welded to each of the first slab lines And one or more first rebars. Similarly, the second slab units are arranged in a direction intersecting the second slab lines with a plurality of second slab lines arranged in parallel at predetermined intervals on the same plane, and the second slab lines And one or more second retaining bars welded to each other. The slab muscle fixing unit includes a plurality of bending bars arranged in parallel at predetermined intervals, and one or more third set bars arranged in a direction crossing the bending bars and welded to the bending bars And have.

  The first and second slab reinforcement units are arranged in an overlapping manner such that the first and second slab reinforcements are orthogonal to each other. The slab anchorage units are arranged in the longitudinal direction at the end of the first slab unit or the second slab unit, and one of the bending portion and each of the first and second slabs are arranged in the longitudinal direction. A lap joint having a predetermined length is formed between the end and the other, and the other bent portion is located in the foundation beam casting portion. The intersections of the first and second slab bars are fixed by cohesion bars, etc., and portions of the lap joint between the bending bars and the first and second slab bars are respectively cord bars and the like. It is fixed by

  Generally, the first slab reinforcement unit, the second slab reinforcement unit and the slab reinforcement unit are factory-produced and transported to a construction site in order to eliminate the variation in quality and reduce the work process in the field. Considering transportation by truck, the dimensions of these reinforcing bar units are restricted by the truck bed size, and the reinforcing bar unit width is limited to about 2 m. When the installation area of the slab bars at the construction site is large, a plurality of first slab bar units and a plurality of second slab bar units are allocated, and between adjacent first slab bar units and adjacent first A lap joint is formed between the two slab units.

  In this case, the first stop bars can be positioned at the position of the lap joint between the adjacent first slab reinforcement units, or on both sides of the lap joint. For example, an end portion of a first slab muscle projecting from a detent at one end of a first slab unit and a first slab muscle projecting from a detent at an end of the other first slab unit The end portions are stacked on each other to form a lap joint.

  In this way, in the portion of the lap joint of the two reinforcing bar units (the first slab unit or the second slab unit), the concrete filled therein is restrained between the retaining bars. become. It is possible to shorten the lap joint length by utilizing the strength of the retaining bar.

  Of course, regardless of the position of the rebar, even if a lap joint of the required length is formed between the ends of the adjacent first slab unit and between the ends of the adjacent second slab unit. Good.

  Next, the overlapping thickness is large in a state in which the first slab muscle unit fixed at a fixed interval by the first rebar and the second slab muscle unit fixed at the fixed interval by the second rebar are superimposed It is desirable not to. For this purpose, in the first slab reinforcement unit, the first rebars are welded to the same side with respect to the first slab reinforcement. In the second slab unit, the second set bars are welded to the same side with respect to the second slab line. Then, the first and second detents are located between the first and second slabs so that the first and second detents do not cross or overlap the first and second slabs, The first and second slab units overlap each other.

  Thus, the overlapping thickness of the first and second slab units can be reduced to the total size of the diameter of the first slab and the diameter of the second slab. That is, as the first and second retaining bars, reinforcing bars having the same diameter or a smaller diameter than the first and second slab bars can be used. Since the first and second stop bars fit within the overlapping thickness dimension of the first and second slab bars, it is possible to suppress an increase in the overlapping thickness.

Next, the present invention is a set of rebar units for foundation slab rebars used in the rebar structure of the reinforced concrete foundation slab of the above-mentioned constitution,
The first slab unit,
The second slab unit,
And a slab rebar fixing unit for securing the fixing length of the first and second slab rebar units to the foundation beam side concrete,
The first slab unit is arranged in a direction intersecting the first slab line with a plurality of first slab lines arranged in parallel at predetermined intervals on the same plane, and welded to each of the first slab lines And at least one first stop muscle,
The second slab unit is arranged in a direction intersecting with the plurality of second slabs arranged in parallel at predetermined intervals on the same plane and the second slab and welded to each of the second slabs And at least one second rebar.
The slab muscle fixing unit includes a plurality of bending bars arranged in parallel at predetermined intervals, and at least one third rebar arranged in a direction crossing the bending bars and welded to the bending bars. Have.

  By carrying in and arranging these three types of reinforcing bar units at the construction site, it is possible to reduce the labor of laying work of the foundation slab, and it is possible to carry out laying with no variation in quality even with inexperienced reinforcing bars. .

It is an explanatory view showing a reinforced concrete foundation and slab anchorage part unit provided with a slab rebar arrangement structure to which the present invention is applied. It is explanatory drawing which shows an example of a 1st slab muscle unit, a 2nd slab muscle unit, and a slab muscle fixing | fixed part unit. It is a description which shows a lap joint between the 2nd slab rebar. It is explanatory drawing of the state which connected the 2nd rebar of the 2nd slab muscle unit by the additional muscle.

  Hereinafter, with reference to the drawings, an embodiment of a reinforcement structure of a reinforced concrete foundation slab to which the present invention is applied will be described.

  FIG. 1 (A) is an explanatory view showing an example of a rebar arrangement structure of a reinforced concrete foundation slab, and FIG. 1 (B) is an explanatory view showing a slab reinforcement portion unit. 2 (A) is an explanatory view showing the first slab muscle unit of FIG. 1, FIG. 2 (B) is an explanatory view showing the second slab muscle unit, and FIG. 2 (C) is a slab muscle fixing unit FIG. Moreover, FIG. 2 (D), (E) is explanatory drawing which shows the overlapping state of a 1st, 2nd slab muscle unit.

  The reinforced concrete foundation 1 includes a foundation slab (pressure-resistant version) 2 and a cloth foundation 3 disposed around the foundation slab 2. The reinforcement structure of the reinforced concrete foundation 1 comprises one or more first slab reinforcement units 4 and one or more second slab reinforcement units 5 disposed in the foundation slab 2, the foundation slab 2 and the cloth foundation It is composed of one or a plurality of slab muscle fixing unit units 6 disposed between the three rising portions. The arrangement of the cloth foundation 3 is, for example, a single arrangement consisting of upper and lower single beam main bars 31 and 32, and ribs 33 welded to these at regular intervals along the length direction of these It is considered to be a muscle.

  The first slab unit 4 is a rectangular flat unit as shown by a solid line in FIG. 2 (A), and a plurality of first slab units 41 arranged in parallel at constant intervals on the same plane. It consists of For example, seven deformed bars (for example, D13) are arranged at a pitch of 250 mm. These first slab reinforcements 41 are fixed by welding at each intersection position with respect to at least one first stop reinforcement 42 arranged in a direction intersecting with them. The first stop bars 42 are, for example, deformed bar steels having the same length as the width of the first slab bar unit 4 (for example, D13), and are arranged in the direction orthogonal to the first slab bars 41. In the present example, a total of three first rebars 42 are disposed at the center position in the lengthwise direction of the first slab bar 41 and the positions at both ends. Each of the first stop bars 42 is disposed on the same side of the first slab bar 41, in this example, below.

  The second slab unit 5 is a substantially square flat plate unit as shown by a solid line in FIG. 2B, and a plurality of second slab units arranged in parallel at constant intervals on the same plane It consists of 51. For example, eight deformed bars (for example, D13) are arranged at a pitch of 250 mm. These second slab reinforcements 51 are fixed by welding at each intersection position with respect to at least one second stop reinforcement 52 arranged in a direction intersecting with them. The second retaining bars 52 are, for example, deformed bar steels having the same length as the width of the second slab bar unit 5 (for example, D13 etc.), and are arranged in the direction orthogonal to the second slab bar 51. A total of four second stopping streaks 52 are arranged, two each at the central portion in the lengthwise direction of the second slab streak 51 and one each at both end portions.

  For example, as shown by an alternate long and short dash line in FIG. 2A, when the width of the foundation slab casting portion 10 corresponds to one sheet of the first slab muscle unit 4, it is shown in FIG. Thus, the two second slab units 5 are arranged at regular intervals. The first slab muscle unit 4 is disposed such that the first stop muscle 42 is located below the first slab muscle 41. The second slab unit 5 is disposed to overlap the first slab unit 4 from the upper side. In this case, the second slab muscle unit 5 is disposed in a direction in which each of the second stopping streaks 52 is located below the second slab muscle 51.

  As a result, as shown in FIGS. 2 (D) and 2 (E), at the same height position as the first slab muscle 41 (force distribution muscle) of the first slab muscle unit 4, The second detents 52 of the two-slab muscle unit 5 are located, and on the lower side thereof, the first detents 42 extending in the orthogonal direction are located, and above the first slab 41 and the second detents 52 , And the second slab muscle 51 (major bar) extending in the orthogonal direction is located. That is, a bar arrangement state in which the reinforcing bars are assembled in the upper and lower three stages is formed.

  Here, in a state in which the first and second slab muscle units 4 and 5 are mutually positioned and stacked in a state in which the first and second slab muscles 41 and 51 are orthogonal to each other, the first rebar 42 is the second The arrangement position of the first stop muscle 42 is set so as not to overlap the slab muscle 51. Similarly, the arrangement position of the second stop muscle 52 is set so that the second stop muscle 52 does not overlap with the first slab muscle 41.

  In addition, the first stop line 42 can be used as one of the second slab lines 51 of the second slab line unit 5 (that is, as a real arrangement line). In this case, the second slab muscle 51 is allocated in consideration of the position of the first stop muscle 42. Similarly, the second stop line 52 can be used as one of the first slab lines 41 of the first slab unit 4. Also in this case, the allocation of the first slab muscle 41 is performed in consideration of the position of the second stop muscle 52.

  Next, the slab muscle fixing unit 6 will be described with reference to FIGS. 1 (B) and 2 (C). The slab muscle fixing unit 6 is composed of a plurality of bending bars 61 arranged in parallel at constant intervals. The bending bars 61 are, for example, seven deformed bars (for example, D13) at a pitch of 250 mm. The bending line 61 is bent at a right angle in this example, and includes a horizontal line portion 61a and a rising line portion 61b. These bending bars 61 are fixed by welding at one or more crossing positions to one or more third stop bars 62 arranged in a direction intersecting with them.

  The third snap bars 62 are, for example, deformed bar steels (e.g., D13) having the same length as the width of the slab fixing unit 6 in the long side direction, and are arranged in the direction orthogonal to the bending bars 61. One third stop line 62 is arranged on the side of the horizontal line portion 61 a of the bending line 61 and two lines are arranged on the side of the rising line portion 61 b. In addition, the third stop line 62 is disposed on the upper side of the horizontal line portion 61 a of the bending line 61 and is disposed on the inner side of the rising line portion 61 b. Similarly to the first and second stop muscles 42 and 52 described above, the third stop muscle 62 can also be used as an actual distribution muscle (slab muscle).

  As shown in FIGS. 1A and 2A, the slab muscle fixing unit 6 is disposed between the end of the first slab muscle unit 4 and the arrangement portion of the cloth base 3. The horizontal muscle portions 61a of the bending bars 61 of the slab muscle fixing unit 6 are disposed laterally along the end of the first slab muscle 41 of the first slab muscle unit 4, and between them, a predetermined length of A lap joint 11 is formed. Further, the third detent 62 of the slab fixing unit 6 is set so as not to overlap the second slab 51 located at the end of the second slab unit 5.

  The reinforcement structure of the foundation slab of this configuration is constructed as follows. The necessary number of first slab unit 4 is laid on the foundation slab casting portion. Further, the necessary number of second slab muscle units 5 is laid in a direction in which the second slab muscle 51 is orthogonal to the first slab muscle 41. The intersections of the orthogonal first and second slab bars 41 and 51 are fixed by cohesion bars or the like.

  On the other hand, the slab muscle fixing unit 6 is disposed on the outer peripheral portion of the foundation slab. The portion of the lap joint formed between the horizontal muscle portion 61a of the bending muscle 61 of the slab fixing portion unit 6 and the end portion of the first slab muscle 41 of the first slab muscle unit 4, for example, Fix it. In addition, the rising line portion 61b of the bending line 61 is fixed to the lower beam main line or rib by a cohesion line or the like.

  The first, second, and third rebars 42, 52, 62 are made of reinforcing steel having the same diameter or a smaller diameter as the first and second slabs 41, 51, and are heavy on the first and second slabs 41, 51 It is placed at a position where Therefore, in the state where the first and second slab reinforcement units 4 and 5 and the slab reinforcement fixing unit 6 are arranged, the thickness of the foundation slab reinforcement portion is equal to the diameter of the first slab reinforcement 41 and the second slab reinforcement 51 It becomes the total dimension with the diameter. Since the first and second stop bars fit within the overlapping thickness dimension of the first and second slab bars, it is possible to suppress an increase in the overlapping thickness.

  Next, the case where the plurality of first slab muscle units 4 are arranged in the length direction or the case where the plurality of second slab muscle units 5 are arranged in the length direction will be described. Generally, in order to eliminate the variation in quality and reduce the work process at the site, the first slab reinforcement unit 4, the second slab reinforcement unit 5 and the slab reinforcement fixing unit 6 are factory-produced and carried into the construction site . Here, the first slab unit 4 and the second slab unit 5 can be manufactured as an integrated slab unit by factory production and carried to the site.

  Considering transport by truck, the dimensions of the unit are limited by the truck bed size, and the unit width is limited to, for example, 2 m. When the installation area of the slab bars at the construction site is large, the plurality of first slab bar units 4 and the plurality of second slab bar units 5 are allocated to the installation location. In this case, lap joints are formed between the adjacent first slab reinforcement units 4 and between the adjacent second slab reinforcement units 5.

  FIG. 3 is an explanatory view showing a lap joint between adjacent second slab units 5. As shown in this figure, an end 51 a of the second slab muscle 51 protrudes from the second stopping muscle 52 at the end of one second slab muscle unit 5. Similarly, at the end of the other second slab muscle unit 5 as well, the end 51 a of the second slab muscle 51 protrudes from the second stop muscle 52.

  The end portions 51a of the second slab bars 51 are overlapped from the side to form a lap joint 53. At the portion of the lap joint 53 of the two second slab reinforcement units 5, the concrete filled therein is in a state of being restrained between the second stopping bars 52 located on both sides of the lap joint 53. It is possible to shorten the length of the lap joint 53 by utilizing the strength of the second rebar 52. The same applies to the lap joint between the other first slab unit 4.

  Note that the first, second, and third snap bars 42, 52, and 62 respectively hold the first slab muscle 41, the second slab muscle 51, and the bending bars 61 in a state in which they are arranged at a constant pitch. It is used as a stop member. As mentioned above, these temporary fixing members can also be used as a structural material for slab reinforcement.

  For example, as shown in FIGS. 4A and 4B, in the second slab muscle unit 5 arranged adjacent to each other, the additional muscle 12 is placed between the second rebars 52 arranged at the corresponding positions. Arrange and connect with each other. Thereby, each of the second stop bars 52 can function as a structural material, that is, the first slab line 41. Each of the other first stop lines 42 can also function as the second slab line 51.

DESCRIPTION OF SYMBOLS 1 Reinforced concrete foundation 2 Foundation slab 3 Cloth foundation 4 1st slab bar unit 5 2nd slab bar unit 6 Slab bar fixing part unit 10 Foundation slab cast part 11 joint 12 side bar 31 beam main bar 32 beam main bar 33 rib 1Slab muscle 42 1st stop line 51 2nd slab line 51a end 52 2nd stop line 53 joint 61 bending line 61a horizontal line portion 61b rising line portion 62 third line

Claims (10)

A reinforcement structure of a reinforced concrete foundation slab, in which slab bars are arranged in a lattice form in a foundation slab driving portion, and ends of the slab bars are inserted into the foundation beam driving portion at a predetermined fixing length,
The first slab unit,
A second slab unit configured integrally with the first slab unit or separately configured from the first slab unit;
And a slab rebar fixing unit for securing the fixing length of the first and second slab rebar units to the concrete on the foundation beam side,
The first slab unit is arranged in a direction intersecting with the plurality of first slabs arranged in parallel at predetermined intervals on the same plane, and is welded to each of the first slabs And one or more first rebars, and
The second slab unit includes a plurality of second slabs arranged in parallel at predetermined intervals on the same plane, and the second slabs arranged in a direction crossing the second slabs. And one or more second rebars being welded;
The slab muscle fixing unit includes a plurality of bending bars arranged in parallel at predetermined intervals, and one or more third stops arranged in a direction crossing the bending bars and welded to the bending bars Equipped with muscle,
The first and second slab units are superimposed on each other such that the first and second slabs are orthogonal to each other.
The slab fixing portion unit is arranged in the length direction at an end of the first slab unit or the second slab unit, and one of the bending portion and each of the first and second bending portions is arranged. A lap joint of a predetermined length is formed between the end of the two slab bars, and the other bent portion is located in the foundation beam casting portion,
Each of the intersections of the first and second slab bars are mutually fixed,
The reinforcement structure of the reinforced concrete foundation slab characterized in that the portions of the lap joints between the bending bars and the first or second slab bars are fixed to each other. In claim 1,
A plurality of the first slab muscle units are arranged in the longitudinal direction of the first slab muscle,
The ends of the first slab bars of the adjacent first slab bar units are stacked together to form a lap joint of a predetermined length,
The reinforcement structure of the reinforced concrete foundation slab in which the said 1st stop bar is located in the position of the said lap joint, or the both sides of the said lap joint. In claim 1,
A plurality of the second slab units are arranged in the longitudinal direction of the second slab units;
The ends of the second slab bars of the adjacent second slab bar units are stacked on one another to form a lap joint of a predetermined length,
The reinforcement structure of the reinforced concrete foundation slab in which the said 2nd stop bar is located in the position of the said lap joint, or the both sides of the said lap joint. In claim 1,
A plurality of the first slab muscle units are arranged in a direction orthogonal to the longitudinal direction of the first slab muscle,
The reinforcement structure of the reinforced concrete foundation slab mutually connected by the additional reinforcement between the edge parts of the said 1st retaining bar of the adjacent said 1st slab muscle unit. In claim 1,
A plurality of the second slab muscle units are arranged in a direction orthogonal to the longitudinal direction of the second slab muscle,
The reinforcement structure of the reinforced concrete foundation slab mutually connected by the additional reinforcement between the edge parts of the said 2nd stop line of the adjacent said 2nd slab line unit. In claim 1,
In the end of the first slab muscle unit, the bending streaks are formed continuously to the first slab muscle, and the slab muscle fixing unit is integrally configured, or
At the end of the first slab unit, the projecting portion of the first slab that protrudes from the first detent is superimposed on the bending line of the slab fixing unit to form a lap joint. Reinforcement structure of reinforced concrete foundation slabs. In claim 1,
A protruding portion of the second slab bar projecting from the second retaining bar at an end of the second slab bar unit is overlapped with the bending bar of the slab fixing unit to form a lap joint. Reinforcement structure of reinforced concrete foundation slab. In claim 1,
In the first slab muscle unit, the first retaining bar is welded to the same side with respect to the first slab bar,
In the second slab unit, the second set bar is welded to the same side with respect to the second slab line,
The first slab is located between the first slab and the second slab so that the first and second reinforcements are located, and the first and second reinforcements do not cross each other. Reinforcement structure of a reinforced concrete foundation slab in which a reinforcement unit and the second slab reinforcement unit are stacked on each other. In claim 1,
A reinforcement structure of a reinforced concrete foundation slab in which the first slab reinforcement unit, the second slab reinforcement unit, and the slab reinforcement fixing unit are factory-produced units. A set of reinforcing member units for foundation slab reinforcement used in the reinforcement structure of a reinforced concrete foundation slab according to any one of claims 1 to 9, comprising
The first slab unit,
A second slab unit configured integrally with the first slab unit or separately configured from the first slab unit;
And a slab rebar fixing unit for securing the fixing length of the first and second slab rebar units to the concrete on the foundation beam side,
The first slab unit is arranged in a direction intersecting with the plurality of first slabs arranged in parallel at predetermined intervals on the same plane, and is welded to each of the first slabs And at least one first rebar.
The second slab unit includes a plurality of second slabs arranged in parallel at predetermined intervals on the same plane, and the second slabs arranged in a direction crossing the second slabs. And at least one second rebar being welded;
The slab muscle fixing unit includes a plurality of bending bars arranged in parallel at predetermined intervals, and at least one third rebar arranged in a direction crossing the bending bars and welded to the bending bars. A set of reinforcing unit for foundation slab reinforcement characterized in that it comprises.

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