JPH0796810B2 - Post-casting method for wall concrete in reverse construction method of building - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reverse striking method in which a basement floor structure of a building is constructed in such a manner that a basement floor structure is sequentially formed downward from a ground level, and more specifically, a reverse striking method. In regard to the method of post-casting wall concrete on each floor.

Conventional technology When constructing the basement structure of a building, the reverse construction method for constructing the basement structure of a building is first constructed by excavating the ground for the first basement to construct the structure of the first basement, and then This is a construction method characterized by constructing a structure on the second basement floor by performing ground excavation for the second basement on the ground, and then constructing the basement floor structure in the depth direction in this order. No. 257941) and many examples.

Conventionally, as a wall construction method for each floor in the upside-down construction method, as shown in FIG. 5, for example, the wall between the first basement floor (B1F) and the first floor (1F) above ground (that is, the wall of B1F) The construction is such that the slab a _{1 of} 1F and the beam b ₁ and the upper part c _{1 of the} wall are pre-cast, and then the slab a ₂ and the beam b ₂ of B1F are pre-cast, and then the wall of the B1F is The lower part c ₁ ′ was completed by stamping. As a method of post-casting the lower portion c ₁ ′ of the wall, the upper part of the post-casting form d of the wall is appropriately inclined inward to form a funnel-shaped portion d ₁ ′, d '
Concrete was thrown in from the top and was placed.

Problems to be Solved by the Present Invention In the post-casting construction of the lower portion C ₁ ′ of the wall described above, concrete is poured from the lateral direction through the funnel-shaped portion d ′ to cast it, so Difficult to fill concrete. Moreover, it is hard to apply a vibrator, so it is difficult to ensure the quality of the finished concrete wall.

Moreover, the wall concrete is cured while being appropriately raised on the funnel-shaped portion d'at the end of the pouring, and since this raised portion e is picked off later, a large amount of picking occurs and it is troublesome. . In addition, there was a problem that the finish of the wall was poor.

Further, since the funnel-shaped portion d'has to be formed, there is a problem that it takes time to assemble the mold d.

Means for Solving the Problems As a means for solving the problems of the above-mentioned conventional technology, the post-casting method for the wall concrete in the reverse construction method of the building according to the present invention is shown in FIGS. 1 to 4 of the drawings. As shown in the examples, in constructing the basement floor structure of the building, the ground excavation for the first basement floor is performed to construct the structure of the first basement floor, and then the ground excavation for the second basement floor is performed to construct the basement floor 2 In the reverse construction method of the building, in which the structure of the floor is constructed and then the structure of the basement is constructed in the depth direction in the following order, when the concrete beams of the upper floor and the slab in the basement structure are placed in advance. After burying a pipe for wall concrete pouring that penetrates to the bottom of the beam at the wall construction position on the next lower floor in advance and constructing the beam and slab on the lower floor, between the upper floor and the lower floor Assembling the wall formwork, above the wall formwork Out by construction rear wall concrete through al the pipe, it was decided to repeat the same process in the basement below.

It should be noted that at least two or more pipes for pouring wall concrete as described above are buried, and when pouring wall concrete,
A hose of a pump car is directly connected to one or more of the plurality of pipes, and a vibrator is inserted into another adjacent pipe to compact the concrete.

Since the wall concrete is cast downward through the pipe that is embedded in the beam on the upper floor in advance, by connecting the hose piped from the concrete pump car to the pipe,
It is extremely easy, reliable, and can be placed quickly and efficiently. Moreover, since the raised concrete piles do not project to the wall as in the past, no bad work such as scavenging is necessary.

Further, since the wall can be constructed by placing the concrete at a stretch, the partition surface of the wall becomes better than that of the conventional splicing method. In addition, since it is not necessary to provide a funnel-shaped portion in the wall form as in the conventional case, assembly is easy and labor is not required.

In addition, since the vibrator can be inserted into the pipes at the adjacent positions other than the pipe to which the hose is connected and the concrete can be compacted at the same time, high-quality concrete pouring can be performed.

First Embodiment Next, a first embodiment of the present invention shown in FIG. 1 will be described.

Figure 1 shows that the beam 1 _{1 on the} first floor above ground (1F) is inside the Yamadome wall 8.
And performs concreting of the slab 2 _1, after the first basement (B1F) of the beam 1 ₂ and slab 2 ₂ concreting prior to perform respectively, to complete the construction of these underground structures Subsequently, shows the stage of while post-deposited construction wall 5 ₁ a concrete B1F.

In other words, the preceding hitting set to 1F, concrete B1F is up to each of the beam bottom, wall 5 ₁ B1F is construction concrete out after all. Further, the beam 1 ₁ 1F, the lower end of the upper end penetrates to beam bottom advance buried pipe 3 ₁ projecting only easy dimensions hose connection on the slab surface. By the way,
The pipe 3 ₁ overall length is the 2m position, diameter to a concrete設用was the same as of φ150 hose 6, 1F
Beam 1 ₁ in the longitudinal direction are a plurality of buried in (the direction perpendicular to the plane), for example, 5m pitch position.

Therefore, the concrete post-strike of wall 5 ₁ of B1F is 1F and B
After first constructing each underground structure on 1F, first
Tightly assembled wall formwork 4 between the B1F slab plane to beam bottom 1F, walls and beams 1 ₁ and the striking Joint span seal mountain cut the side as needed for waterproofing Set up 7. Then, connect the hose 6 connecting the piping from the pump wheel to the pipe 3 ₁ projecting above slab 2 ₁ 1F, it is pouring from above through intact pipe 3 ₁ concrete that has been pumped. At the same time, the pipe 3 ₁ at the adjacent position is inserted with a bi-plater to compact the poured concrete.

Since the pumping pressure is applied to the concrete poured in this way, a solid concrete filling is performed in the joint between the wall 5 ₁ and the beam 11 ₁ . In addition, the finished surface of the wall 5 ₁ is good because it can be sufficiently compacted. Moreover, there is no need for scavenging work, as there is no swelling of concrete on the wall.

Second Example FIG. 2 shows a post-casting method for wall concrete when a basement structure of B2F or less is constructed deeper than that of FIG.

In this case, since the wall 5 ₁ a B1F as in the first view is concreting earlier than that of the B2F, next under floor after building the wall 5 ₁ a B1F wall 5 ₂ (B2F) Concrete Need to be able to postpone. For this, in advance
The pipe 3 ₂ embedded in the beam 1 _{2 of the} B1F or the pipe 3 ₃ of the B2F is installed so as to be inclined so as to open inside the walls 5 ₁ and 5 ₂ , respectively. In short, it is necessary to bury the pipe in the beam of each basement in advance.

Therefore, after the wall 5 ₁ a concrete B1F is Da設earlier, there is no hindrance to connecting the hose 6 so as to pouring the wall 5 ₂ concrete B2F the pipe 3 _2. Therefore, it is possible to easily perform the step of repeating the pouring of the wall concrete in order in the depth direction in exactly the same manner as in the case of the first embodiment described above.

It should be noted that the pipes 3 ₂ , 3 ₃ ...
Is bent in a crank shape as shown in FIG. 3A, or is bent inward at a substantially right angle as shown in FIG. 3B so that the upper end is opened inside the walls 5 ₁ , 5 ₂ ... It is also possible to carry out in the form.

Third Embodiment Next, FIG. 4 shows that, among the basement structure of the building, for the time being, only the beams 1 ₁ to 1 ₃ and the slabs 2 ₁ to 2 _{3 on} each floor were constructed in advance, and thereafter, Walls 5 ₁ and 5 _{2 on} each floor are the lowest floor (B2F)
It shows the construction method in the case of post striking in order of the wall 5 _{2 of the first} floor and the wall 5 ₁ of the upper floor (B1F).

In this embodiment, the pipe 3 _1, 3 ₂ may be buried in a vertical position in all of the first view of the beam 1 _1, 1 ₂ as in the example, the hose 6
There is no problem in connection with. Not only that, the used pipe 3 ₂ is completely buried in the concrete of the wall 5 _{1 on} the upper floor, and there is also an advantage that post-treatment such as cutting off a part of the pipe after the wall construction is not required. is there.

EFFECTS OF THE INVENTION According to the post-casting method for the wall concrete in the reverse construction method of the building according to the present invention, the concrete pouring can be done while the pumping pressure is being applied to the concrete by using the concrete pump car. In addition to saving the labor of transportation, concrete is densely filled in the joint.

Further, the wall formwork may be simply assembled to the beam floor on the upper floor, and does not require consideration of forming a funnel-shaped portion as in the conventional case, so that it is not troublesome and troublesome. Moreover, since no concrete scrubbing work is required as a useless construction, it is possible to reduce labor, shorten the construction period, and expect cost reduction.

Further, according to the invention of claim 2, the concrete wall can be easily and sufficiently compacted by the vibrator at the same time when the concrete is poured, so that a high quality concrete wall with a good partition surface can be constructed and the quality is good. A concrete structure can be constructed.

[Brief description of drawings]

FIG. 1 is a construction drawing showing a first embodiment of a post-casting method for wall concrete according to the present invention, FIG. 2 is a construction drawing of the same second embodiment, and FIGS. 3A and 3B are different regarding embedding of pipes. 4 is a construction drawing of the third embodiment, and FIG. 5 is a construction drawing of a conventional wall concrete post-casting method.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsukasa Kawai 1-18-22 Nishiki, Naka-ku, Aichi Prefecture 1-28, Inc. Takenaka Corporation Nagoya Branch (72) Inventor Toyawa Imai 1-18-22 Nishiki, Naka-ku, Nagoya, Aichi Prefecture 18-22 Takenaka Corporation Nagoya Branch (72) Inventor Sawai Hirotaka 1-18-22 Nishiki, Naka-ku, Nagoya-shi, Aichi Stock company Takenaka Corporation Nagoya Branch (56) References JP-A-60-133161 (JP, A)

Claims (2)

[Claims] 1. When constructing a basement floor structure of a building, ground excavation for the first basement floor is carried out to construct a structure for the first basement floor, and then ground excavation for the second basement floor is carried out to construct the basement floor of the second basement floor. In the reverse construction method of the building that constructs the structure and then builds the basement structure in the depth direction in the following order, when the concrete beams of the upper floor and the slab in the basement structure are placed in advance, After burying a wall concrete pipe that penetrates to the bottom of the beam at the wall construction position on the lower floor in advance and constructing the beam and slab on the lower floor, for the wall between the upper floor and the lower floor Wall concrete in a reverse construction method of a building, characterized by assembling a formwork, post-casting wall concrete from above the formwork for the wall through the pipe, and repeating the same steps on each basement floor below. How to beat. 2. At least two pipes for pouring wall concrete according to claim 1 are buried in a plurality of pipes. When pouring wall concrete, one or a plurality of the pipes are used as a pump car. Post-casting method for wall concrete in reverse construction method of building, characterized in that the hose of is directly connected and a vibrator is inserted into other adjacent pipe to perform concrete compaction.