JPH08105063A - Precast concrete slab unit and work method thereby - Google Patents

Abstract

PURPOSE: To speed up the connection of precast concrete slabs themselves as well as to strengthen the fixation yet more by installing lip channel steel and a hollow casing in a footing precast concrete slab. CONSTITUTION: A straight type footing precast concrete slab 1A1 is made up of assembling a base part 1A with a triangular channel 10 on the base, and an upright reflector 1A installing lip channel steel 2 at both end sides in the weighting direction and being longer than this base part 1A1 into an inverted T-shaped type. In addition, each stirrup 3 in uprightness is arranged as reinforcement in the footing precast concrete slab 1A at each regular interval, while four lower end main reinforcing bars 4 and a lot of horizontal reinforcing bars 5 are arranged in the longitudinal direction L, and likewise a base reinforcing bar 6 and a trapezoidal reinforcing bar 7 are arranged in the cross direction. Further three hollow casings 9a, 9b and 9c are installed in the vertical direction in a pierce-through manner. Next, the lip channel steel 2 and the main reinforcement 4 of the adjacent footing precast concrete slab 1A are opposed with each other, and a connector is inserted into this lip channel steel 3, and the main reinforcing bars 4 are welded together, and then mortar is made to flow over from each top face of these hollow casings 9a, 9b, 9c and the lip channel steel 2 and connected and locked tight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for constructing a building by a reinforced concrete construction method (RC) and a unitized PC (precast concrete) plate used for the construction, particularly on site. The present invention relates to a PC version unit that can be assembled in an appropriate manner to complete the work easily and quickly, and a construction method using this PC version unit.

[0002]

2. Description of the Related Art Reinforcing bar anchoring is the most important issue in the RC method, but the reinforcing bar anchoring was not sufficient in the conventionally proposed unit method. Further, when the conventional PC version is used, the demand is limited because the free design of the building is limited,
As a result, there is a vicious circle in which the PC version becomes expensive because constant production cannot be achieved. The present invention has been made in view of these problems, and provides an inexpensive PC plate unit which ensures fixing of reinforcing bars and enables free design of a building, and the PC. It is an object to provide an easy and quick construction method using a plate unit.

[0003]

In order to achieve the above-mentioned object, a base PC plate according to a first aspect of the present invention has a base portion placed on a horizontal plane and an upright member whose length direction is longer than the base portion. A plurality of star wraps, which are continuously provided with a skeleton part, are laid out from the upright skeleton part to the base part, and whose upper ends are exposed upward from the upright skeleton part, and the upright skeleton body. A hollow casing provided so as to penetrate from the upper surface of the portion to the bottom surface of the base portion,
At both ends in the length direction of the upright skeleton part, a lip groove type steel provided in the vertical direction, and a reinforcing bar penetrating the base part in the length direction, both ends of which are horizontal from the base part. Main bar exposed to, and various rebars that are arranged in relation to the main bar and the stirrup, and is formed vertically and horizontally on the bottom surface of the base portion, a part of the lower end of the hollow casing And a groove communicating with.

In the wall type PC plate according to a second aspect, a wall plate portion which is installed in an upright state and a beam receiving portion which is orthogonal to the wall plate portion and projects in one direction are connected to each other to form an inverted L section. A cutout groove formed in the shape of a letter, formed in the bottom surface of the wall slab portion through the lengthwise direction, and a hollow casing provided so as to penetrate from the top surface to the bottom surface of the wall slab portion, It is provided vertically on both ends of the wall slab,
It is characteristically provided with a lip groove type steel having a notch corresponding to the notch groove formed at a lower end portion thereof, and rebars longitudinally and laterally arranged in relation to the lip groove type steel.

According to a third aspect of the auxiliary wall type PC plate, a concrete main body formed in a rectangular parallelepiped shape, a beam main bar which is a reinforcing bar penetrating the main body in the longitudinal direction, and an inside of the main body. In the characteristically, a stirrup, which is welded in a direction orthogonal to the beam main bar, a part of which is exposed from the main body, and a rectangular hollow rectangular steel pipe embedded in the main body. There is.

The construction method according to claim 4 is the method according to claim 1.
In the construction using the PC plate for foundation, a plurality of PC plates for foundation are appropriately arranged, the lip groove type steel and the main bar of the adjacent PC plates for foundation are faced to each other, and the lip channel type steel faces are faced. Inserting a connecting tool between, welding the main bars facing each other, and repairing the vicinity of the welded main bars with concrete, corresponding base by pouring mortar from the upper surface of the hollow casing and the lip groove type steel. We are planning to finish the installation work for the PC version.

[0007]

The present invention will be described in more detail based on the following examples. FIG. 1 is a perspective view showing a direct type PC plate 1A of the basic PC plate 1 of the present invention, and FIG. 2 is a sectional view conceptually showing the same. . The foundation for the PC version. 1A, the base portion 1A ₁ an upright skeleton portion 1A _2, cross-sectional view is formed in an inverted T-shape. The upright skeleton portion 1A ₂ is formed longer in the length direction (L) than the base portion 1A ₁ , and both ends thereof are
Lip channel steel (C channel) 2 is provided in the vertical direction. In this basic PC plate 1A, a plurality of upright stirrup (belts) 3 are arranged at regular intervals. Further, four lower end main bars 4 and a large number of horizontal bars 5 are arranged in the length direction (L), and a base bar 6 and a hooked bar 7 are arranged in the width direction (W). . Here, the upper end portion of the stirrup 3 is exposed, and the upper end main reinforcement 8 (see FIG. 9) is arranged on the exposed portion at the site. Further, both ends of the lower end main bar 4 are exposed, and when the base PC plates 1A are connected to each other, they are electrically pressure-welded or are welded by superposing the reinforcing bars. Both ends of the horizontal bar 5 are welded to the lip groove type steel 2.

The base PC plate 1A is also provided with hollow casings 9a, 9b, 9c penetrating in the vertical direction. The hollow casing 9 is made of iron, aluminum, or plastic, and spiral ridges are formed on its outer surface and inner surface. _On the bottom surface of the base portion 1A ₁ , a triangular groove 10 penetrating in the length direction is formed in a saw blade shape. Further, three rectangular grooves 11 are provided orthogonally to the triangular groove 10, and the rectangular groove 11 and the triangular groove 10 communicate with the lower end portion of the hollow casing 9, respectively. The base portion 1A ₁ is provided with six vertical through holes 12 corresponding to the rectangular groove 11, and the upright frame portion 1b is provided with horizontal through holes 13. The horizontal through hole 13 is used as a ventilation hole or the like.

FIG. 3 is a corner-type basic PC plate 1B.
Is shown in a perspective view (a) and a plan view (b). The base PC plate 1B is composed of a base portion 1B _{1 that} is square in a plan view and an upright skeleton portion 1B ₂ that is substantially L-shaped in a plan view. The upright frame portion 1B ₂ is formed so that both ends thereof project from the base portion 1B ₁ and lip groove type steel 2 is provided in the vertical direction of both ends. Reinforcing bars are also appropriately arranged in this basic PC version 1B,
The upper end of the stirrup 3 is exposed, and both ends of the lower end main bar 4 are exposed. Further, a hollow casing 9 is provided so as to penetrate in the vertical direction. _On the bottom surface of the base portion 1B ₁ , rectangular grooves 11 are formed in a diagonal line and triangular grooves 10 are formed in the vertical and horizontal directions, respectively, which communicate with the lower end of the hollow casing 9.

4 and 5 are perspective views (a) and plan views (b) of the three-way type and four-way type base PC plates 1C and 1D, respectively. PC version for these 1
The configurations of C and 1D are almost the same as those shown in FIG.
Square type foundation for PC version 1C, C are that comprises an upstanding precursor portion 1C ₂ in a plan view substantially T-shaped, four-way Basics for PC version 1D type, upright in plan view cross-shaped skeleton section 1D ₂ The only difference is that.

Next, a procedure for carrying out a foundation construction using the foundation PC plates 1A, 1B, 1C and 1D having the above-mentioned configuration will be described. As shown in FIG. 6 and FIG.
Sumi-exposed concrete 21 is provided on the above, and the direct type, the corner type, the three-way type, and the four-way type base PC plates 1A, 1B, 1C and 1D are appropriately combined and arranged. In this case, since the bottom surface of each foundation PC plate is formed in a saw-tooth shape, even if there are small stones, it can be stably placed on the stain-out concrete 21. A base muscle is arranged between the adjacent triangular grooves 10 in accordance with the arrangement of the basic PC plate. When the arrangement of the basic PC plate is completed in this way, the through hole 1
Drive a round steel pile into 2 and fix it. Then, the lower end main bars 4 of the adjacent base PC plates are welded together (see FIG. 7),
Repair between adjacent bases with concrete. Further, an appropriate number of connecting tools 22 as shown in FIG. 10 are inserted between the opposed lip groove type steels 2 and the round steel 24 and the lip groove type steels 2 are welded and connected (see FIG. 8). Connector 22
Means that an H-shaped steel 23 having an appropriate length is perforated and a round steel (rebar) 24 is inserted and fixed (FIG. 10).

After that, a pipe of a plasterer's concrete pump (pump for mortar) is inserted into the hollow casing 9b in the center, and a vibrator is inserted into the other hollow casings 9a and 9c until the hollow casings 9a and 9c are filled with mortar. Fill the mortar with. At this time, the end of the rectangular groove 11 is appropriately closed. The mortar filling operation is also performed between the opposing lip groove type steels 2. FIG. 8 is a plan view showing the connecting portion of the PC plate for the foundation, which includes the lip groove type steel 2 and the H type steel 23.
, Round steel 24, Styrofoam 25, mortar 26
And are shown. Then, after allowing a concrete curing period for a while, the soil 27 is backfilled, and a chestnut 28 is laid to apply natural pressure. Then, the upper end main bar 8 is laid in the exposed portion of the stirrup 3, the slab (dirt) line 29 is laid, and concrete 30 is placed to complete the construction. In addition, 31 is a panel for construction.

[Embodiment 2] FIG. 11 is a perspective view of a wall type PC plate 40. This wall type PC version 40
The wall slab portion 41 and the beam receiving portion 42 are connected to each other and are formed in an inverted L-shaped cross section, and the length in the length direction is formed to be the same as that of the basic PC plate 1A shown in FIG. . The wall slab 41 is
Concrete is provided by arranging reinforcing bars vertically and horizontally, and the surface thereof is tiled 41a as required.
It has been painted and finished. It should be noted that design styrene may be charged when the PC plate 40 is manufactured. The wall plate portion 41 includes a hollow casing 9 of the base PC plate 1A.
The hollow casing 43 corresponds to the positions of a, 9b, and 9c.
a, 43b, 43c are provided, and a substantially V-shaped joining groove 44 communicating with the hollow casing 43 is provided in the horizontal direction on the bottom surface of the wall slab 41. The hollow casing 43 has a diameter such that a hose of a plasterer's pump can be inserted therein, and spiral ridges are provided on the inner surface and the outer surface thereof. Although omitted in FIG. 11A,
A suspending wire 45 is fixed near the upper ends of the hollow casings 43a and 43c (see FIG. 11B). Lip groove type steel 46
(Lightweight C channel) is buried, and the end of the reinforcing bar is welded to this. Further, a substantially V-shaped notch 46 a is provided at the lower end of the lip groove type steel 46. The beam receiving portion 42 is a portion for producing a beam on the spot on the spot, and is a portion for stabilizing fixing of reinforcing bars of a floor type PC plate, a balcony type PC plate, etc., which will be described later. The hollow portion 42a formed in the center is a portion that ensures the fixing of concrete, and is a portion that is crushed when a pillar is manufactured. A through hole 47 for a bolt is provided in a part of the wall surface of the recessed portion 42 a, and a panel 48 for a separator 48 is provided on the outer wall surface of the beam receiving portion 42.
Are provided (FIG. 12).

Next, a method of constructing a wall by combining the wall type PC plates 40 shown in FIG. 11 will be described. In the state where the foundation work is completed, since the anchorage reinforcing bar is projected from the casing 8 of the foundation PC plate, the transverse bar is first connected to this anchoring reinforcing bar. After that, the wall-type PC plate 40 is lowered by using the hanging wire 45, the wall-type PC plate 40 and the hollow casings 43 and 8 of the base PC plate 1 are aligned, and the fixing reinforcing bars protruding from the foundation are hollow. It is inserted in the casing 43. In this state, the horizontal bar connected to the fixing reinforcing bar is inserted into the joint groove 44 or the notch 46a formed in the bottom portion of the wall type PC plate 40. Then, in the same manner as in the case of the base PC plate 1, mortar is poured from the hollow casing 43 to fix the wall-type PC plate 40 to the base. At this time, a fixing reinforcing bar (main wall reinforcing bar) 50 is provided in the upper part of the hollow casing 43 in preparation for connecting the PC plate to the upper stage (FIG. 12). When another wall type PC plate 40 is to be installed next to the wall type PC plate 40, a bolt 49 is inserted in the through hole 47.
Attach and fix the adjacent lip groove type steel 46
The connecting tool 22B is inserted thereinto, and the lip groove type steels 46 are welded to each other via the round steel 24. And lip groove type steel 4
Pour the mortar into 6 and fix it. FIG.
FIG. 6 is a plan view showing in detail the connection points of the wall-type PC plate 40, including H-shaped steel 23, round steel 24, lip groove type steel 46,
The relationship of the mortar 51 is shown. In addition, mortar 5
U-shaped joint 52 (rubber or plastic) at the end of 1
And a roll steel 53 is provided.

[Third Embodiment] FIG. 14 is an auxiliary wall 60 mainly for use as a beam reinforcement for use in a portion facing the outside.
Is illustrated. The auxiliary wall 60 has a rectangular parallelepiped main body portion 61, two beam main reinforcements 62 penetrating the main body portion 61 in the longitudinal direction, a stirrup 63 welded to the beam main reinforcements 62 inside, and a rectangular hollow. Formed square steel pipe 6
4. Here, the length of the auxiliary wall 60 is
Typically, the length is the same as that of the wall-type PC plate 40, and the position of the steel pipe 64 is adapted to the position of the hollow casing 43 of the wall-type PC plate 40. The auxiliary wall 60 is used by being connected to the wall-type PC plate 40 and the like, but since both are manufactured in the same factory and have a uniform appearance, it is superior in appearance to casting the auxiliary wall portion on site. FIG. 15 shows a floor type P
It is the figure which showed the C plate 65, and the reinforcing bar 66 arrange | positioned longitudinally and transversely, the U groove 67 and the V groove 68 which are formed by turns in the length direction (L), and the center of the width direction (W). V groove 6
9 and a suspension bar 70 provided in the U groove 67. The non-through hole 71 is a hole that is used for electrical wiring or the like by penetrating the hole, if necessary.

Next, the case where the floor type PC plate 65 is provided on the wall type PC plate 40 will be described. In this case, it is necessary to arrange the auxiliary wall 60 on the beam receiving portion 42 of the wall-type PC plate 40 (see FIG. 16). Specifically, the wall-type PC plate 4
The square steel pipe 64 of the auxiliary wall 60 and the main body end portion 61a are arranged at the positions of the fixing reinforcing bar 50 and the connecting tool 22B protruding from 0. Then, the beam main bars 62 of the adjacent auxiliary walls 60 are brought into contact with each other to weld the contact portions 62a. Further, the reinforcing bars 72 are arranged orthogonally to the stirrup 63, concrete is placed, and the floor type PC plate 65 is constructed (FIG. 17). The same applies to the case where another wall-type PC plate 40 is provided on the wall-type PC plate 40, and the fixing rebar 50 protruding through the auxiliary wall 60 and the connecting tool 22B are used to successively connect them. It should be noted that the end portion 46 of the wall-type PC plate 40 continuously provided on the upper side
And the end portion 46 of the lower wall type PC plate 40 do not coincide with each other, from the square steel pipe 64a of the auxiliary wall 60 to the connector 2
2 is projected to perform continuous construction work (see FIG. 16).

FIG. 18 is a perspective view of the balcony type PC plate 70. This PC version 70
Also, although the reinforcing bars are arranged vertically and horizontally, one end of the stirrup 71 provided in the width direction (W) is exposed. Further, at one end in the length direction (L), three rebars 72 are exposed and a lip groove type steel 73 is provided, which is used for connecting the PC plate 70. PC
The plate 70 has a recess 70a formed in the center thereof. Then, on the right side in the width direction, a square steel pipe 74 that penetrates a rectangular hollow
Is provided, and a square steel pipe 75 that does not penetrate is provided at the left side in the width direction and one end in the length direction, and is used for handrail mounting. A hollow casing 76 is provided on one side in the length direction. The groove 77 is for draining water.
The construction for installing the balcony is the same as in the other cases and is as shown in FIGS. 19 and 20. A fixing rebar 78 penetrates through the casing 76, and the wall type PC plate 40, the floor type PC plate 65, the balcony type PC plate 70, and the handrail type P
The relationship with the C version 79 is shown. In addition, 80 is a support.

[0018]

As described above, the P according to the present invention
Since all C plate units are provided with lip groove type steel and hollow casing, it is convenient that the installation work can be carried out by utilizing this portion. For example, if the connection tool and the reinforcing bar are projected from the hollow casing and the lip groove steel in a state where the installation of the PC plate is completed, another PC plate can be surely and rapidly connected in series. In this way each PC
Since the plates can be freely connected, each PC plate unit can be an optimal unit that is lightweight and compact. Wall type PC
Since the plate is composed of a wall slab portion and a beam receiving portion, a floor plate PC plate, a balcony PC plate, etc. can be freely attached by appropriately using the beam receiving portion. The wall-type PC plate has an inverted L-shaped cross section,
Since the auxiliary wall type PC plate is attached as necessary, the floor plate PC plate can be attached to the front side and the back side of the wall plate PC plate, and various floor plans can be dealt with.

Further, since the wall type PC plate is provided with a beam receiving portion, by directly striking the beam there (concrete striking), the main reinforcing bars such as floor boards (slabs) and cantilever slabs (balconies) are concentrated and fixed. Can be used and is structurally preferable. Further, the newly inserted single (through) beam main bar and the stirrup of the auxiliary wall type PC plate can obtain strength comparable to the RC construction method created on site. Further, since the PC plate unit of the present invention can be mass-produced in a factory, not only can the price be reduced, but it is also possible to stably supply a high quality product that is more beautiful than the one cast on site.

[Brief description of drawings]

FIG. 1 is a perspective view showing a basic PC plate of the present invention.

2 is a conceptual illustration of the cross-sectional view of FIG. 1. FIG.

FIG. 3 illustrates a corner-type base PC plate.

FIG. 4 is a diagram showing a three-sided basic PC plate.

FIG. 5 illustrates a four-sided basic PC plate.

FIG. 6 is a plan view illustrating an arrangement state of a base PC plate.

FIG. 7 is a diagram illustrating a method of connecting a base PC plate.

FIG. 8 is a plan view illustrating a method of connecting the base PC plate.

FIG. 9 illustrates a completed state of foundation work.

FIG. 10 illustrates a connector.

FIG. 11 is a perspective view of a wall-type PC plate.

FIG. 12 is a diagram showing a state in which the wall-type PC plate is completely installed.

FIG. 13 is a plan view showing a part of FIG. 12 in detail.

FIG. 14 is a perspective view of an auxiliary wall type PC plate.

FIG. 15 is a perspective view of a floor-type PC plate.

FIG. 16 is a plan view showing an arrangement state of an auxiliary wall type PC plate.

FIG. 17 is a cross-sectional view showing a continuous installation state of wall-type PC plates.

FIG. 18 is a perspective view showing a balcony type PC plate.

FIG. 19 is a plan view showing a state in which balcony type PC plates are connected in series.

FIG. 20 is a cross-sectional view showing a state in which the wall-type PC plate and the balcony-type PC plate are connected in series.

[Explanation of symbols]

 1A to 1D PC plate for base 2 Lip groove type steel 3 Stir wrap 4 to 8 Reinforcing bar 9 Hollow casing 10 Triangular groove 11 Rectangular groove 40 Wall type PC plate 41 Wall plate part 42 Beam receiving part 43 Hollow casing 44 Notch groove (joint groove) ) 46 lip groove type steel 46a notch 60 auxiliary wall type PC plate 61 main body 62 beam main bar 63 stirrup 64 square steel pipe

Claims (4)

[Claims] 1. A base PC plate comprising a base portion placed on a horizontal surface and an upright frame portion, the length of which is longer than the base portion, connected to each other, wherein the upright frame portion extends from the base portion. A plurality of stirrup (belts) whose upper end is exposed upward from the upright skeleton part, and penetrates from the upper surface of the upright skeleton part to the bottom surface of the base part. A hollow casing provided, and at both ends in the longitudinal direction of the upright frame portion, lip groove type steel provided in the vertical direction, and a reinforcing bar penetrating the base portion in the longitudinal direction, and both ends thereof. Main bar part is exposed horizontally from the base part, various rebars that are arranged in relation to the main bar and the stirrup, and is formed vertically and horizontally on the bottom surface of the base part, Part is the hollow casing A base PC plate, comprising: a groove communicating with the lower end of the groove. 2. A wall-type PC having an inverted L-shaped cross section in which a wall slab installed in an upright state and a beam receiver projecting in one direction orthogonal to the wall slab are continuously provided. A plate, a cutout groove penetrating in the length direction and formed in the bottom surface of the wall plate portion, a hollow casing provided so as to penetrate from the upper surface to the bottom surface of the wall plate portion, and the wall plate portion. And a grooved grooved steel that is provided in the vertical direction at both ends in the longitudinal direction and has a notch corresponding to the grooved groove formed at the lower end, and longitudinally and horizontally arranged bars in relation to this lip grooved steel. A wall type PC plate characterized by comprising: 3. A rectangular parallelepiped main body made of concrete, a beam main bar which is a reinforcing bar penetrating the main body in a longitudinal direction, and a main bar which is welded inside the main body at right angles to the beam main bar. An auxiliary wall type PC plate, comprising: a stirrup, a part of which is exposed from the main body, and a rectangular hollow rectangular steel tube embedded in the main body. 4. A base part placed on a horizontal plane and an upright frame part, which is larger than the base part in the longitudinal direction, are connected to each other and are arranged from the upright frame part to the base part. It has a plurality of star wraps, the upper end of which is exposed upward from the upright skeleton section, and a hollow casing which is provided through from the upper surface of the upright skeleton section to the bottom surface of the base section, At both ends in the length direction of the upright skeleton part, a lip groove type steel provided in the vertical direction, and a reinforcing bar penetrating the base part in the length direction, both ends of which are horizontal from the base part. Main bar that is exposed to, various rebars that are arranged in relation to the main bar and the stirrup, is formed vertically and horizontally on the bottom surface of the base portion, a part of the lower end of the hollow casing With the groove that communicates A construction method using a PC plate for foundation comprising: a plurality of PC plates for foundation are appropriately arranged, and the lip groove steel and the main bar of adjacent PC plates for foundation are faced to each other, and By inserting a connecting tool between the lip groove type steels, welding the facing main bars to each other, repairing the vicinity of the welded main bars with concrete, and pouring mortar from the upper surface of the hollow casing or the lip groove type steel. A construction method characterized by finishing the installation work of the applicable basic PC version.