JPH07139057A - Jointing method for precast concrete wall construction - Google Patents

Abstract

PURPOSE:To ensure the easy positional adjustment of a precast slab for the erection thereof, manufacture the slab for a simple structure and at low cost, and further ensure the easy handling of the slab by applying a simple lap joint without any welding in place. CONSTITUTION:In this jointing method for a precast concrete wall construction, a precast slab having a sheath tube 2 buried in such state as penetrating in a vertical direction, is erected so that a lower axial reinforcement 5 projected from a lower floor building frame is inserted in the sheath tube 5. Thereafter, an upper axial reinforcement 5 is inserted in the tube 2 from upper level, and the lower section thereof is superposed on the lower axial reinforcement 5, thereby forming a joint. Also, the upper section of the upper axial reinforcement 5 is projected above from the precast slab and the sheath tube 2 thereof is filled with grout 8 from upper level. The precast slab is jointed, due to the curing of the grout 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall type precast reinforced concrete joining method for joining precast plates in a vertical direction.

[0002]

2. Description of the Related Art A wall-type precast reinforced concrete structure is a construction method in which a wall-type reinforced concrete structure, which is a structural element consisting of a wall and a floor, is precast for each structural element and assembled on site. There are various construction methods depending on which part is used as the precast member, and for example, there is a bearing wall. This load bearing wall is, for example, in the shape of a gate or a square, and is usually made into a precast plate by integrating a wall pillar portion and a wall beam portion attached to the wall pillar portion.

There is a setting base system as a vertical joining of the load bearing walls. For example, as shown in FIGS. 8 and 9, an anchor bar 10 is provided on the load bearing wall 100 on the lower floor.
A T-shaped steel plate 102 having No. 1 is buried, and a steel plate 105 having anchor bars 104 is also buried below the bearing wall 103 on the upper floor. This steel plate 102 and steel plate 10
The connection steel plate 106 is applied and welded to the No. 5 to join, the mortar 107 is filled in this connection portion, and the joining is completed by solidification of the mortar.

Further, there is a splice sleeve system as a vertical joint of another bearing wall. For example, as shown in FIG. 10, a splice sleeve 112 in which a reinforcing bar 111 is inserted is buried in a lower portion of a bearing wall 110 on an upper floor. , So that the reinforcing bar 114 protruding from the upper portion of the bearing wall 113 on the lower floor is inserted into the splice sleeve 112, the bearing wall 1 on the upper floor
10 is arranged, the grout is injected and filled in the splice sleeve 112, and the grout is solidified to complete the joining.

[0005]

By the way, in the setting base method, due to the on-site welding, sufficient attention must be paid to the quality control, and there is a possibility that the welding accuracy may vary depending on the skill of the welding worker. Further, since the T-shaped steel plate is embedded in the upper part of the precast plate, the production of the precast plate becomes more complicated.

Further, in the splice sleeve method, a reinforcing bar protruding from the upper part of the precast plate on the lower floor is inserted into the splice sleeve, but since the clearance between the splice sleeve and the reinforcing bar is small, the position of the splice sleeve and the reinforcing bar in the production of the precast plate. Precision is required. Furthermore, since the reinforcing bar projects from the upper part of the precast plate, the reinforcing bar becomes an obstacle during manufacturing and transportation.

The present invention has been made in view of such a situation, and by using a simple lap joint without field welding, it is easy to adjust the position of the precast plate during erection.
Moreover, it is an object of the present invention to provide a wall-type precast reinforced concrete joining method that allows a precast plate to be manufactured with a simple structure and at low cost, and that the precast plate is easy to handle.

[0008]

In order to solve the above-mentioned problems, the method of joining wall-type precast reinforced concrete structures according to claim 1 is characterized in that a precast plate having a sheath pipe embedded in the sheath pipe in a vertical direction. , Place it so as to insert the lower axis rebar protruding from the lower floor structure, and then
Inserting the upper shaft rebar from above in the sheath tube, the lower part of the upper shaft rebar is overlapped with the lower shaft rebar to form a joint, and the upper part of the upper shaft rebar is projected upward from the precast plate, The sheath tube of this precast plate is characterized by injecting and filling grout from above and joining the precast plate by solidifying the grout.

According to the method of joining wall-type precast reinforced concrete structures of claim 2, a precast plate in which a sheath pipe is buried by penetrating in the vertical direction is embedded in the sheath pipe, and a lower axial rebar protruding from the lower floor frame is provided in the sheath pipe. Place it to insert,
Between the lower layer skeleton and the precast plate, a frame body that surrounds the periphery of the joint portion of the precast plate is positioned, and the upper axial rebar is inserted into the sheath tube from above, and the lower part of the upper axial rebar is inserted. To form a joint, and the upper part of the upper shaft rebar is projected upward from the precast plate, and by grouting the sheath tube of the precast plate from above, the frame is surrounded by the frame body. It is characterized in that the grout is injected and filled between the lower layer skeleton and the joint portion of the precast plate, which is further continuously injected and filled in the sheath tube, and the precast plate is joined by solidification of the grout. .

[0010]

According to the first aspect of the present invention, the sheath pipe of the precast plate is arranged so as to insert the lower axial rebar protruding from the lower floor frame, and the upper axial rebar is inserted into the sheath pipe from above. , The lower part of the upper shaft rebar is overlapped with the lower shaft rebar to form a joint, the upper part of the upper shaft rebar projects upward from the precast plate, and the sheath tube of the precast plate is filled with grout from above, The precast plates are joined by solidifying the grout.

In this way, by inserting the upper shaft rebar from the upper side into the sheath tube and stacking the lower part of the upper shaft rebar on the lower shaft rebar to form a joint, use a simple lap joint without field welding. Therefore, it is easy to adjust the position when constructing the precast plate.

Further, the precast plate is formed with a sheath tube penetrating therethrough, and the sheath tube does not project to the outside. Therefore, the precast plate can be manufactured with a simple structure and at low cost, and the precast plate can be manufactured. It is easy to handle and does not get in the way during transportation or transportation.

Further, since the lower portion of the upper shaft reinforcing bar is overlapped with the lower shaft reinforcing bar to form a joint, it is not necessary to adjust the top end level of the lower floor reinforcing bar as in the conventional splice sleeve system.

According to the second aspect of the present invention, the grout is injected and filled between the lower skeletal structure surrounded by the frame and the joint portion of the precast plate, and further continuously injected and filled into the sheath tube. The precast plates are joined by solidifying.
In this way, since the grout is injected and filled also in the gap between the lower floor skeleton and the joint portion of the precast plate, the joint portion of the precast plate, which is usually laid with mortar, can be simultaneously grout filled and the construction is easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wall type precast reinforced concrete joining method according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is an elevational view of a wall precast reinforced concrete wall arrangement. This wall type precast reinforced concrete wall arrangement shows, for example, a medium-rise house. The wall-type precast reinforced concrete structure is made by precasting a wall-type reinforced concrete structure consisting of walls and floors, which are structural elements, into precast plates for each structural element and assembled at the site. In this wall type precast reinforced concrete construction, the load bearing walls 1 of the precast plates are constructed by joining in the horizontal direction and joining in the vertical direction.

The load bearing wall 1 has a gate-like shape, and the wall column portion 1a and the wall beam portion 1b attached to the wall column portion 1a are integrally formed into a precast plate, and the load bearing walls 1 are connected to each other. Vertical joining is shown in Figures 2 to 7 for the standard floor, but the same applies to the first floor or the top floor.

2 to 4 show the vertical joining method of the bearing walls of the standard floor. FIG. 2 is a vertical sectional view showing the joining method of the bearing walls in the vertical direction, and FIG. FIG. 4 is a sectional view taken along line III, and FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 to 7 show the vertical joint structure of the bearing wall of the standard floor. FIG. 5 is a vertical sectional view showing the joint structure of the bearing wall in the vertical direction, and FIG. 6 is VI- of FIG. 6 is a sectional view taken along line VI, and FIG. 7 is a sectional view taken along line VII-VII in FIG.

The load bearing wall 1 of the precast plate has a wall pillar portion 1
A sheath tube 2 is embedded in a through in the vertical direction, and the sheath tube 2 has a flat shape. In this embodiment, one sheath tube 2 is embedded, but a plurality of sheath tubes 2 are embedded as needed.

The load bearing wall 1 is arranged so that the axial rebar 5 on the lower side of the lower floor projecting from the floor slab 3 is inserted into the sheath tube 2 thereof. Then, the upper shaft rebar 5 is inserted into the sheath tube 2 from above, the lower portion 5a of the upper shaft rebar 5 is overlapped with the lower shaft rebar 5 to form a joint, and the upper portion 5b of the upper shaft rebar 5 is joined.
Project upward from the bearing wall 1.

Between the lower portion of the wall column portion 1a of the load bearing wall 1 and the floor slab 3, a frame body 6 surrounding the joint portion of the lower portion of the wall column portion 1a is positioned. The frame 6 is made of rubber packing and is attached to the floor slab 3.

Then, the grout injection pipe 7 is inserted into the sheath tube 2 of the load bearing wall 1 from above to the lower portion, the grout 8 is injected from this grout injection pipe 7, and the grout injection pipe 7 is moved upward in response to this injection. The sheath tube 2 is lifted up and filled up to the top of the sheath tube 2. During this construction, sheath tube 2
From below, the grout 8 is filled up to the space between the floor slab 3 and the lower joint of the wall column 1a surrounded by the frame 6.

In this way, the wall pillar portion 1a surrounded by the frame body 6
The grout 8 is injected and filled into the sheath tube 2 from the gap between the lower joint of the floor slab 3 and the floor slab 3, and the bearing wall 1 is joined by solidification of the grout 8.

When the vertical joining of the bearing wall 1 of this layer is completed, the floor slab 3 of the upper floor is installed on the bearing wall 1. Furthermore, the load bearing wall 1 on the upper floor is attached to the sheath tube 2 thereof.
The lower axial reinforcing bar 5 protruding from the floor slab 3 on the upper floor is arranged so as to be inserted, the upper axial reinforcing bar 5 is inserted into the sheath tube 2 from above, and the lower 5a of the upper axial reinforcing bar 5 is moved downward. The shaft reinforcing bar 5 is overlaid on the upper portion 5b to form a joint, and the load bearing wall 1 on the upper floor is joined in the vertical direction in the same manner as described above.

In this way, the upper shaft rebar 5 is inserted into the sheath tube 2 from above, and the lower portion 5a of the upper shaft rebar 5 is overlapped with the lower shaft rebar 5 to form a joint. By using such a lap joint, the position can be easily adjusted when the load bearing wall 1 is built, and the joining accuracy of the load bearing wall 1 is improved.
In particular, since the sheath tube 2 is flat and there is a play between the sheath tube 2 and the shaft rebar 5, the play allows the bearing wall 1 to move during erection and facilitates position adjustment.

A sheath tube 2 is formed so as to penetrate through the load bearing wall 1, but since the sheath tube 2 does not project to the outside, the load bearing wall 1 has a simple structure and is manufactured at low cost. In addition, the load bearing wall 1 is easy to handle without any hindrance during manufacturing or transportation.

Further, since the lower portion 5a of the upper shaft reinforcing bar 5 is overlapped with the lower shaft reinforcing bar 5 to form a joint, it is not necessary to adjust the top end level of the lower floor reinforcing bar as in the conventional splice sleeve system.

Further, by injecting the grout 8 into the sheath tube 2 of the load bearing wall 1, the grout 8 is also provided in the space between the floor slab 3 and the lower portion of the wall column 1a of the load bearing wall 1 surrounded by the frame 6. The joint portion of the wall column portion 1a of the load bearing wall 1 which is injected and filled and is normally constructed with mortar can be grout-filled at the same time, and the construction is easy.

Further, in the grout injection work, the grout injection pipe 7 is raised upward in response to the injection of the grout 8 and the uppermost portion of the sheath tube 2 is filled, so that the filling and filling can be performed without using a special pump or the like. The construction is possible even if you are not a skilled worker.

Furthermore, the joining method of the wall type precast reinforced concrete construction is not limited to the bearing wall 1, but can be applied to the joints of handrails, non-bearing walls and the like.

[0032]

As described above, according to the first aspect of the invention, the sheath tube of the precast plate is arranged so that the lower axial reinforcing bar projecting from the lower floor frame is inserted, and thereafter,
Insert the upper shaft rebar into the sheath tube from above, stack the lower part of the upper shaft rebar on the lower shaft rebar to form a joint, and project the upper part of the upper shaft rebar upward from the precast plate to perform field welding. Since a simple lap joint that does not have the structure is used, it is easy to adjust the position when constructing the precast plate.

Further, the precast plate is formed with the sheath tube penetrating therethrough, and the sheath tube does not project to the outside. Therefore, the precast plate can be manufactured with a simple structure and at low cost, and the precast plate can be manufactured. It is easy to handle and does not get in the way during transportation or transportation.

Further, since the lower part of the upper shaft reinforcing bar is overlapped with the lower shaft reinforcing bar to form a joint, it is not necessary to adjust the top end level of the lower floor reinforcing bar unlike the conventional splice sleeve system.

According to a second aspect of the present invention, the grout is injected and filled between the lower floor frame surrounded by the frame and the joint portion of the precast plate, and further continuously injected and filled into the sheath tube. Since the precast board is joined by solidifying, the grout is injected and filled into the gap between the lower floor frame and the joint part of the precast board, so the joint part of the precast board, which is usually constructed with mortar, can also be grout filled at the same time. Is easy.

[Brief description of drawings]

FIG. 1 is an elevational view of a wall precast reinforced concrete wall arrangement.

FIG. 2 is a vertical cross-sectional view showing a vertical joining method of load bearing walls.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a vertical cross-sectional view showing a vertical joint structure of a load bearing wall.

6 is a sectional view taken along line VI-VI in FIG.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a vertical cross-sectional view showing a conventional vertical joining method for a load-bearing wall.

9 is a right side view of FIG.

FIG. 10 is a vertical cross-sectional view showing a conventional vertical joining method for a load-bearing wall.

[Explanation of symbols]

 1 Bearing wall 2 Sheath tube 5 Axis rebar 8 Grout

Claims (2)

[Claims] 1. A precast plate in which a sheath pipe is embedded by penetrating in the vertical direction, is arranged so that a lower axial reinforcing bar projecting from a lower floor frame is inserted into the sheath pipe, and thereafter,
Inserting the upper shaft rebar from above in the sheath tube, the lower part of the upper shaft rebar is overlapped with the lower shaft rebar to form a joint, and the upper part of the upper shaft rebar is projected upward from the precast plate, A wall-type precast reinforced concrete joining method characterized in that the sheath tube of the precast plate is filled with grout from above and the precast plate is joined by solidification of the grout. 2. A precast plate in which a sheath pipe is embedded by penetrating in the vertical direction so that a lower axial reinforcing bar projecting from the lower slab is inserted into the sheath pipe, and the lower slab and the precast plate are arranged. A frame surrounding the periphery of the joint of the precast plate is positioned between the plate and the upper axial rebar is inserted into the sheath tube from above, and the lower part of the upper axial rebar is inserted into the lower shaft. A joint is formed by stacking on the reinforcing bar, the upper part of the upper shaft reinforcing bar is projected upward from the precast plate, and the grout is injected into the sheath tube of the precast plate from above, so that the lower floor structure surrounded by the frame body And a precast plate are jointly filled with grout, and further continuously filled into the sheath tube, and the precast plate is joined by solidification of the grout. Precast reinforced concrete joining method.