JPH03172434A - Consolidated structure of half pc wall with hardened body of post-placed concrete - Google Patents

Abstract

PURPOSE:To consolidate a half PC wall with a hardened body of post-placed concrete by fixing one end of a separator to an insert embedded in the half PC wall, fixing a cone to the other end, and then executing the post-placed concreting. CONSTITUTION:A half PC wall W in which an insert 11a is embedded in advance, is installed at site, and a form F is put in place. Then one end of a separator 120a is secured to the insert 110a, and a cone 140a is fixed to the other end. This cone 140a is fitted with a form tie 200, and a timbering members are arranged followed by fixation, and the cone 140a is secured to the form F. Then, post-placed concrete is executed between the half PC wall W and frame F. Thereby exfoliation of a hardened body C of post-placed concrete off the half PC wall W can be prevented effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention mainly relates to half-brake casting (hereinafter referred to as rPc).
It is called J. ) Concerning an integrated structure of a 71-F PC wall and post-cast concrete 1/cured body for integrating a wall (a wall partially made of PC) and post-cast concrete,
More specifically, a half PC wall without truss bars, and
At the joints with columns, beams and other major structural members,
Second, it relates to an integrated structure of a half PC wall and a post-cast concrete hardened body, which is suitable for omitting truss reinforcements.

[Prior Art] In constructing structures, various construction methods have been invented and devised for the purpose of rationalizing construction and saving labor.

The PC composite construction method is one of such construction methods, and is a construction method that has been widely used in recent years and has shown great effects. In particular, for buildings with tiled exterior walls, PCization is easy, and
Half PC walls are often used because of their high cost benefits.

The PC composite construction method is a construction method in which a part of a concrete structure is manufactured in a factory, that part is installed on site, and the other part is constructed using post-cast concrete.

The PC composite construction method can be broadly classified into seven types depending on the presence or absence of truss bars in the half-PC wall used in the half-PC construction method.

When using a half PC wall having truss bars, it is advantageous in that it can be integrated with post-cast concrete 1. However, since the truss bars are placed outside the hoops and stirrups at the joints between the half-PC wall and the main structural members such as columns, beams, etc., the raised area becomes larger and the internal space is reduced accordingly. The disadvantage was that it decreased. Another disadvantage was that the use of truss bars increased the cost.

Therefore, the present inventor developed a half-PC composite construction method that uses a half-PC wall without truss reinforcements in order to eliminate such drawbacks. Such a half PC wall is a half PC wall having a cotter on the outer periphery of the half PC wall.

On the other hand, when constructing a half PC wall, it is usual to use a separator designed for concrete lateral pressure when temporarily constructing the formwork F.

[Problems to be Solved by the Invention] However, as shown in Fig. 4, if the truss bar is simply eliminated and post-cast concrete is poured, the conventional separator will prevent the half PC wall W and post-cast concrete from hardening in the future. It is not effective against separation from body C. The adhesion force between the lid and the separator and the post-cast concrete hardened body is not high enough to be effective against mutual peeling between the half PC wall W and the post-cast concrete hardened body C, especially when the separator is made of high-tensile steel. be. Therefore, it cannot be expected that the half PC wall W and the post-cast concrete hardened body C will be prevented from peeling from each other due to the fertility of the separator and the post-cast concrete 1/hardened body C.

However, no clear proposal has been made to prevent such peeling.

The present invention has been made in view of the problems of the prior art, and its purpose is to have the same effect as the conventional separator and to provide a half PC wall W.
It is an object of the present invention to provide an integrated structure of a half PC wall and a post-cast concrete hardened body, which can effectively prevent separation of the post-cast concrete hardened body C and the post-cast concrete hardened body C in the future.

[Means for Solving the Problems] The gist of the present invention is to provide a half PC wall, and an inserter partially buried in the half PC wall on a hardened post-cast concrete poured on one side of the half PC wall. -, a separator attached to the insert, and a separator attached to the separator and embedded in the concrete 1 no 1 hardened body? Half PC featuring 4111 additional features
It consists of an integrated structure of the wall and post-cast hardened concrete.

[Effect] The insert secures the separator.

The separator connects the insert embedded in the half PC wall and the fixing tool embedded in the post-cast concrete hardening body.

The fixing device prevents the hardened post-cast concrete from coming off the separator.

Further, when post-cast concrete is poured, lateral pressure is generated on the formwork due to the kinetic energy, self-weight, etc. of the post-cast concrete. Such lateral pressure causes tensile stress in the separator. When the post-cast concrete hardens,
After the post-cast concrete has hardened, the fixing device acts like a fixing device in prestressed concrete (this tensile stress is taken as the residual tensile stress of the separator).

Therefore, according to the present invention, it is possible to integrate the half PC wall and the post-cast concrete 1/cured body. As a result, peeling between the half PC wall and the post-cast concrete hardened body can be effectively prevented. Therefore, half P
Peeling between the C wall and the post-cast concrete 1/cured body can be effectively prevented.

Note that the fixing device including a fixing tool etc. according to the present invention includes:
Since it has a separator, it can be used as a spacer for the formwork F.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the component parts described in this example are not intended to limit the scope of this invention to only those, unless otherwise specified. , is merely an illustrative example.

(Example 1) First, the configuration of an integrated structure of a half PC wall and a post-cast concrete hardened body according to Example 1, which is an example of the present invention, will be described using FIG. 1(A).

FIG. 1(a) is a plan view showing a state in which the half PC wall W and the post-concrete 1/hardened body C are embedded.

The integrated structure of the half PC wall and the post-cast concrete 1/hardened body according to Example 1 is as shown in FIG. 1-110a, a separate L/-120a, a connecting insert (fixing tool) 130, and a cone 140a.

Said insert] I Oa is made of steel, and has a female screw having an opening at one end formed inside. Further, the other end has a flange on the outer periphery.

It is buried in the half PC wall W so that the opening opens toward the post-cast concrete hardened body C side.

The separator 120a has one end connected to the insert 11.
0H, and the other end is screwed to the cone 140a, thereby attaching it to the insert 110a and the cone 140a. The separator 120a according to the first embodiment includes two separator units 120a1. l 20 a 2,
They are connected by the connection insert 130.

Both separator units 20a, 120a are steel rod-shaped bodies, and male threads are formed on the outer periphery of each end.

The connecting insert 130 has a cylindrical shape and has a flange at one end, and has a generally T-shape as a whole when viewed from above. Further, an acid screw hole is formed so as to penetrate in the longitudinal direction. Both separator units 120a
, , 120a are screwed together to connect both separator units 120a, , 120a. Although the connecting insert 130 has a flange at only one end, this is not intended to limit the scope of the present invention, and the present invention may provide flanges at both ends. Furthermore, a flange can also be provided at the intermediate portion. Note that if the diameter of the separator 120a is increased to ensure the required bearing pressure area, it is not necessary to provide a flange.

The cone +408 has a truncated cone shape and is made of resin. It is formed by embedding the post-cast concrete hardened body C on the formwork F side, which will be described later, with the smaller bottom area facing the half I) C wall W side. The cone 14
0a has a female threaded hole penetrating through both bottoms thereof.

Next, a method of constructing an integrated structure of the half PC wall and the post-cast concrete 1/cured body according to the first embodiment will be explained using FIG. 1(b). FIG. 1(B) is a front view showing a state in which the installation of the fixing device 100a consisting of the insert I]Oa, the separator 120a, and the connecting insert is completed.

First, the half PC wall W is installed at the site, and the formwork F is installed at a required position.

Next, the separator unit 120a (-) is attached by screwing into the insert 11Oa.

Note that the insert 1loa is attached to the half PC wall W.
bury it in advance during molding.

Next, the connecting insert 130 is attached by screwing to the other end of the separator unit 120aI.

Next, the cone 140a is attached to one end of the other separator unit 120a by screwing it together.

Next, the separator unit 120a to which the cone 14.0a is attached is attached by screwing onto the connection insert 130.

Next, the form tie 200 and the cone 140 Attach by screwing into 0a.

Next, the shoring members are placed and fixed with washers 300 and nuts, resulting in the state shown in FIG. 1(b).

Through the following two steps, the integrated structure of the half PC wall and the post-cast concrete 1-hardened body according to Example 1 can be built horizontally.

Next, post-cast concrete 1 is placed between the half PC wall W and the formwork F.

After the post-cast concrete 1 is cured and becomes a post-cast concrete hardened body C, the nuts and washers 3°O1 shoring,
Form tie 200, formwork F, and the cone l 10
21 is removed. Note that the cone 140a is not removed, and the remaining cone 140a remains on the post-concrete 1/hardened body C.

According to the above process, the half P shown in FIG.
It is possible to have an integrated structure of the C-wall and the post-cast concrete hardened body.

The following steps are not intended to limit the scope of the present invention, and may be carried out by any suitable steps for carrying out the present invention.

In addition, the yield strength Pu of the insert 1.10a is PC
Same as the proof stress of F insert 1loa, Pu-π・0.6
(0,72ah 10.897h') It can be expressed as follows.

Therefore, when calculated from the above formula, in normal construction, the number of fixing devices 1 ooa is equal to the formwork F1m.
4 to 5 pieces per 2 pieces is sufficient.

In short, the operation of the integrated structure of the half PC wall and the post-cast concrete hardened body constructed as above will be explained.

The collar of the insert I I Oa prevents the insert I I Oa from coming off the post-cast concrete hardened body C.

The insert l l Oa and the separator 120a
Since they are screwed together, the connection between them is strengthened.

Furthermore, when post-cast concrete is placed, lateral pressure is generated on the formwork F due to factors such as the kinetic energy and self-weight of the post-cast concrete. Due to this side pressure, the separator +
A tensile stress is generated at 20a.

When the post-cast concrete hardens, the fixing tool 130
After the post-cast concrete has hardened, the tensile stress is taken as the residual tensile stress of the separator 120a, as if it were a fixing device in prestressed concrete.

The collar provided on the connecting inserter 1-130 increases the adhesion strength between the separator 120a and the post-cast concrete hardened body C.

Note that the fixing device] 00a is the inserter hll
oa, the separator 120a, and the cone]/I
Since it has Oa, it can be used as a spacer for the formwork F.

Next, the effect of the integrated structure of the half PC wall and the post-cast concrete 1/cured body constructed as above will be explained.

According to the integrated structure of the half PC wall and the post-cast concrete hardened body according to the first embodiment, the half PC wall W and the post-cast concrete hardened body C can be integrated. Therefore, peeling between the half PC wall W and the post-cast concrete hardened body C can be effectively prevented. As a result, peeling between the half PC wall W and the post-cast concrete hardened body C can be effectively prevented.

In addition, since the half PC wall W is not provided with truss bars, the workability of the half PC wall W is
It is possible to demonstrate economic efficiency and other benefits.

Further, since the fixing device 100a is constructed by combining conventional parts, there is no need to develop a special separator 20a or the like. Therefore, the fixing device 100
The development cost for a is low. Therefore, the fixing device 1
The unit price of 00a can be kept low.

Further, it is sufficient to provide the fixing device 100a with 4 to 5 pieces per formwork F1m''. Therefore, the fixing device 100a
Even if the fixing device 100a is used, the construction cost will not be much higher than when the fixing device 100a is not used.

Furthermore, since the separator 120a is composed of the two separator units 120a, 120a, . An integrated structure of the wall and the post-cast concrete hardening body can be applied.

In addition, the connecting inserter h ] 30 and the both sets/N
+Later Uni,! 120a1, 120a, and 120a are joined by screwing together, so that both sets of cells/N+relay =, y+-120a, and 120a2 can be firmly joined.

Further, the collar provided on the connecting insert 130 integrates the half PC wall W and the post-cast concrete hardened body C by the residual tensile stress generated in the separator + 208. Therefore, the said no-fu PC wall W
It is possible to prevent the post-concrete concrete 1 and the cured product C from peeling off from each other.

Note that the controller 120 according to the first embodiment
a is a 2-tree separator method, 120a, 12Oa
Although the present invention is not intended to limit the scope of the present invention to this, it is possible to use a structure divided into a suitable number for carrying out the present invention. When the separator 120a is composed of three or more separator units, and the separator units are connected by the connection insert 130, the fixing device 100
The fixing force between a and post-cast concrete increases. Therefore, the separator 120a can be replaced with two separators.
120a, , 120a, it is possible to prevent the half PC wall W and the post-cast concrete hardened body C from peeling off from each other.

In addition, two separator units 12 according to the first embodiment
Although 0a1 and 120a2 have the same length, this is not intended to limit the scope of the present invention, and in the present invention, the separator 120 is constituted by separator units of different lengths as shown in FIG. 1(C). Something will happen. In such a case, since the separator unit on the side of the formwork F is short, it is possible to use a ready-made pivot leg or the like suitable for carrying out the present invention.

Further, the cone 140a according to the first embodiment can be in contact with the formwork F or can be buried inside the formwork F as shown in FIG. 1(C). In such a case, finishing may be accomplished by filling the cavity with a cement paste agent, corn pound, or other material suitable for carrying out the present invention.

Further, the cone 140a is made of resin, and there is no intention to limit the scope of the present invention thereto.
In the present invention, other materials suitable for carrying out the present invention, such as those made of steel, may be used.

Furthermore, in Example 1, the connection insert 130 was used, but this is not intended to limit the scope of the present invention.
, in the present invention, instead of the connecting insert 130, a cone]. 40a, long nuts, etc., suitable for carrying out the present invention can be used.

Furthermore, a closure such as a deformed steel bar may be formed in a portion other than each end of the separator 20a. In such a case, the adhesion force between the separator 120a and the post-cast concrete hardened body C can be improved.

Furthermore, if the fixing device 100a is used, it is possible to partially
It is also possible to omit truss reinforcements at the joints with major structural members such as beams.

Furthermore, even when integrating with truss reinforcements, in columns, beams, etc., the truss reinforcements are placed outside the hoops and stirrups, so they are fixed in the unreinforced parts. Therefore, the performance of the separator method is high.

Furthermore, the present invention does not intend to limit the scope of the present invention to whether ordinary concrete is used as the post-cast concrete, but other materials, such as polymer concrete, resin concrete, reinforced fiber concrete, etc., may be used to carry out the present invention. You can use whatever is suitable for you.

(Example 2) Next, Example 2, which is an example of the present invention, will be described using FIG. 2(A).

The integrated structure of the half PC wall and the post-cast concrete hardened body according to the second embodiment is as shown in FIG. ．． It consists of a separator 120b, a nut insert (fixing tool) 150, and a cone 140b. However, the separator 120b according to the second embodiment is a single piece, and a male screw is formed in half of the separator 120b in the longitudinal direction.

The nut insert 150 is connected to the separator 120.
It is provided in the middle of b.

The other configurations are the same as the configuration of the fixing device 100a of the first embodiment.

When the male screw is buried in the post-cast concrete hardened body C, the adhesion between the separator 120b and the post-cast concrete hardened body C is increased. This is because the male screw has the same function as the cap provided on the deformed steel bar. Therefore, according to the integrated structure of the half PC wall and the post-cast concrete hardened body according to the second embodiment, the integration of the half PC wall W and the post-cast concrete hardened body C is further strengthened compared to the first embodiment. It can be done. As a result, the half PC
Peeling between the wall W and the post-cast concrete hardened body C can be prevented.

Furthermore, since the separator 120b is a single unit, the fixing device 100b consisting of the insert 110b, the separator 120b, the nut insert 150, and the cone 140b can be assembled more easily than the fixing device 100a according to the first embodiment. be.

The nut insert +50 is the connecting insert 11. according to the first embodiment. It has the same action and effect as Ob.

Further, the fixing device toob is the fixing device 1 of the first embodiment.
The same actions and effects as 00a can be obtained.

The method for constructing an integrated structure of a half PC wall and a post-cast concrete hardened body according to Example 2 is 9. Construction of an integrated structure of a half PC wall and a post-cast concrete hardened body according to Example 1 The method is similar. In such a case, when the fixing device 100b is installed, the second
The situation will be as shown in Figure (B).

(Example 3) Next, regarding Example 3, which is an example of the present invention, the third
This will be explained using Figure (A) and Figure 3 (B).

The integrated structure of the half PC wall and the post-cast concrete hardened body according to the third embodiment is as shown in FIG. ．． It consists of an IOC, a separator L/IOC 120G, and a cone IOC (fixing tool).

The cone I/IOc is a truncated cone and is buried with the smaller bottom area facing the half PC wall W, thereby preventing the post-cast concrete hardened body C from coming off the separator 120C. do.

0 In the third embodiment, the cone 140C itself functions as a fixing device.

The separator 120C according to Example 3 is a single piece. In addition, the connecting insert 130 or the nut insert 150
No equivalent has been established.

Therefore, the fixing device 1 includes the insert 110C, the separator 120C, and the cone 140C.
00C can be installed more easily than in the fixing device 100b according to the second embodiment.

Further, the unit price of the fixing device 100c can also be reduced.

Although the cone 140C is used as the fixing device of the fixing device 100C, this is not intended to limit the scope of the present invention. As shown in FIG. 1, any suitable fixing insert 160 can be used to carry out the present invention.

The method for constructing the integrated structure of the half PC wall and the post-cast concrete 1 and the hardened body according to Example 3 is as follows:
The method is similar to the method for constructing an integrated structure with the cured body. In such a case, when the fixing device and the OOC are installed, the state will be as shown in FIG. 3 (c).

1 Advantages of the Invention 1 The present invention, configured as described above, produces the effects described above.

According to the present invention, it is possible to integrate the poured concrete 1 and the hardened body after the half PC wall. Therefore, it is possible to effectively prevent separation between the half PC wall and the post-cast concrete hardened body.

Of course, the fixing device comprising a fixing tool, a separator, etc. according to the present invention can be used as an intermediate holder for maintaining a required distance between the formwork and the half PC wall.

Also, can be used as a half PC wall! - Since it is possible to use a wall without lath reinforcement, it is possible to take advantage of the ease of construction, economy, and other benefits of such a half I) C wall.

In addition, it is possible to partially omit truss reinforcements at the joints with main structural members such as columns and beams.

Furthermore, even when integrated with truss reinforcements, I/lath reinforcements are placed on the outside of hoops and stirrups in columns, beams, etc., so they are fixed in unreinforced areas. Therefore, the performance of the separator method is high.

Further, since the present invention can be implemented by combining conventional parts, there is no need to develop special separators, fixing devices, etc. However, the development cost will be lower.

Therefore, the unit price of the fixing device according to the present invention can be kept low. On the other hand, the fixing device according to the present invention does not require a huge number of fixing devices. Therefore, even if the fixing device according to the present invention is used, the construction cost will not be much higher than when the fixing device is not used.

[Brief explanation of the drawing]

Figures 1 (a) to 1 (c) show Example 1, which is 3rd to 4th example of the implementation of the present invention, and Figure 1 (a) shows a fixing device embedded in a post-cast concrete hardening body. FIG. 1(B) is a plan view showing the state in which the fixing device is installed in the formwork. FIG. 1(C) is a plan view showing the state in which the fixing device is installed in the formwork. FIG. Plan view showing the state in which the device is embedded in post-cast concrete hardened body, Figure 2 (A) and Figure 2
Figure (B) shows Example 2, which is an embodiment of the present invention, and Figure 2 (B) is a plan view showing the state in which the fixing device is embedded in the hardened post-cast concrete. B) is a plan view showing the state in which the fixing device is installed in the formwork, and FIGS. (A) is a plan view showing the state in which the fixing device is embedded in a post-cast concrete hardened body, and Fig. 3 (B) shows another embodiment of Embodiment 3, in which the fixing device is embedded in a post-cast concrete concrete body. FIG. 3(C) is a plan view showing a state in which the fixing device is embedded in a cured body, FIG. 3(C) is a plan view showing a state in which the fixing device is installed in a mold, and FIG. 4 is a plan view showing a conventional example. W...Half PC wall, C...Post-cast concrete hardened body, F...Formwork, 100a, 100b,]0Oc--Fixing device,]
]Oa 110b, ], ]l0c---Insert 120a120b, 120c...Separator, 120
a, 120a2... separator unit,
130...Connection insert, 140a, ]40b, 140cm--cone, 150
...Nut insert, 160 ... Fixing insert, 200 ... Form tie, 300 ... Washer,

Claims (1)

[Claims] A half PC wall, a post-cast concrete hardened body placed on one side of the half PC wall, an insert partially buried in the half PC wall, a separator attached to the insert, and a separator attached to the separator, and An integrated structure of a half PC wall and a post-cast concrete hardened body, characterized by comprising a fixing tool embedded in the concrete hardened body.