JPH11131502A - Molding method of concrete basement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To closely integrate a wall concrete and a floor concrete into a unit to promote waterproof efficiency between them. SOLUTION: An outside form 5 for molding the circumferential wall is mounted on leveling concrete 4 to bear. An inside form 6 for molding the circumferential wall is separated from the upper surface of the leveling concrete 4 to bear, and a concrete outlet 9 connected to a void D between both inside and outside forms is formed in the lower end of the inside form 6. A wall concrete C is cast in the void D between both inside and outside forms 5 and 6, a floor concrete C is simultaneously or continuously cast on the leveling concrete 4, and both concretes C and C are integrated into a unit without placing joints.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for forming a concrete basement.

[0002]

2. Description of the Related Art Conventionally, as a construction method for constructing a basement with concrete, as shown in FIG.
After the concrete is cast and cured, the wall form 1
There is a construction method in which a concrete wall 103 is formed by casting concrete into the wall formwork 102 and constructing the concrete wall 103.

[0003]

In the above-mentioned construction method, the concrete placing operation extends over two days in order to wait for the concrete on the floor 101 to harden. It is necessary to dispatch and dispatch two days, which increases the cost.

[0004] In addition, a joint A between the concrete of the floor 101 previously cast and the concrete of the wall 103 cast later has a difference in shrinkage rate and vibration due to a shift in the time at which the concrete is cast. There are often gaps,
There is concern about the waterproofness of the joint A. In particular, in the case of a basement, the earth pressure (water pressure) at the joint A is the maximum, but the waterproofing at the joint A is performed by the water stop plate 10 embedded in the floor 101.
At present, it relies on a waterproof layer that covers the outside of the basement. Even with such large waterproofing, the wall 103
Due to the fall of the water stop plate 104 at the time of concrete casting, the joint A has a weak point of the interlayer seam, so that complete waterproofing cannot be expected.

Accordingly, the present invention provides a concrete basement molding method which solves the above-mentioned problem by integrally molding the floor and the wall with solid concrete and, if necessary, also integrally molding the ceiling. It is the purpose.

[0006]

According to a first aspect of the present invention, an outer mold for forming a peripheral wall is disposed on a concrete, and is supported on the concrete. The inner mold for molding is thrown away and supported from the upper surface of the concrete, and at the lower end of this inner mold, a concrete outlet communicating with the gap between the inner and outer molds is formed, and the gap between the inner and outer molds is formed. It is characterized in that the concrete for the wall is placed inside the concrete and the concrete for the floor is poured simultaneously or continuously on the discarded concrete, so that the two concretes are integrated without joining.

[0007] In the present invention, the concrete for the wall cast in the gap between the inner and outer molds flows out of the concrete outlet formed at the lower end of the inner mold, and is simultaneously or continuously cast with the unhardened concrete. The unhardened floor concrete mixes and integrates seamlessly.

According to a second aspect of the present invention, in the first aspect, the upper end of the inner mold for forming the peripheral wall is formed shorter than the upper end of the outer mold, and the upper end of the inner mold is located at the upper end of the inner mold. And place and support the ceiling formwork, and simultaneously or continuously cast concrete for the wall to be cast in the gap between the inner and outer formworks and concrete to be cast on the ceiling formwork, and mix the two concretes. It is characterized by being integrated seamlessly.

In the second aspect of the present invention, the concrete for the wall and the concrete for the ceiling, which are cast in the space between the inner and outer molds, are also integrated without a break. According to a third aspect of the present invention, in the first or second aspect, a support is driven into the ground where a floor is formed by standing in the ground, and the support is subjected to a water stopping process. A removable support is provided between the upper end of the column and the inner and outer forms to support the inner and outer forms.

In the third aspect of the present invention, when the inner and outer molds for forming the peripheral wall are supported from the inside, the inner and outer molds can be easily and reliably supported by the pillars and the support, and the pillars can be waterproofed. Nature can be secured.

According to a fourth aspect of the present invention, in the first, second, or third aspect, the outer mold for forming the peripheral wall is a thin PC board having a reinforcing bar protruding from the inner surface side. ,
The inner frame is a perforated metal plate, and these are connected in advance at a factory.

In the fourth aspect of the present invention, only the outer formwork is erected and supported at the site, and the inner and outer formworks are simultaneously installed, and the work of arranging the inner and outer formwork at the site is unnecessary. Workability at the site can be improved, and the construction period can be further shortened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described based on an embodiment shown in the drawings. 1 to 4 show a first embodiment of a construction method for forming a basement.

According to the construction method of the first embodiment, first, a root cut 1 is made in a basement component as shown in FIG. 2 (a), and a support 2 made of precast concrete or the like is placed underground at a predetermined position of the root cut. Driving and planting.

Next, a groundwork 3 made of split rock or the like is applied to the root cutting bottom, and a discarded concrete 4 is cast on the upper surface thereof. At this time, a part of the discarded concrete 4 is wound around the outer circumference of the support 2,
The rolled concrete 4a waterproofs the two pillars.

After the waste concrete 4 has hardened, the outer mold 5 and the inner mold 6 for forming the peripheral wall of the basement are removed.
Stand on top. The outer frame 5 is formed of a precast concrete plate (PC plate) formed into a thin plate of a predetermined size, and a reinforcing bar 7 as shown in FIGS. It is fixed. The reinforcing bar 7 includes an omnia bar including a truss bar 7a and a top bar 7b, and a horizontal main bar 7.
c and a vertical main bar 7d. The inner formwork 6 is formed of a perforated plate such as a wire mesh or a lath having holes to such an extent that the cast concrete does not flow out, and is connected to the outer formwork by connecting members 8 such as bolts standing on the outer formwork 5 side. 5 and is held by the outer formwork 5 with a predetermined gap D. Further, the lower end 6a of the inner form 6 is shorter (higher) than the lower end 5a of the outer form 5 by a dimension H corresponding to the thickness of the floor to be cast. A flow port 9 is formed. Further, a support portion 5c is integrally formed at a predetermined position on the outer mold frame 5, and a support fitting 10 is detachably provided on a front end surface (inner surface) thereof.

The inner and outer molds 5 and 6 integrally produced at the factory are transported to the site, suspended by a crane or the like, and the lower end 5a of the outer mold 5 is set in FIGS. The diagonal support 12 is erected between the supporting metal 10 and the supporting metal 11 detachably provided at the upper end of the column 2 as shown in FIG. The standing state of is maintained.

Further, necessary reinforcing bars are arranged on the discarded concrete 4, and a water stop plate 13 is fixedly mounted on the support column 2 at a central portion in the thickness direction of the floor to be cast. Further, the required number of the inner and outer mold frames 5 and 6 are connected in a lateral direction (left and right direction) as shown in FIG.

Next, the concrete C ₁ is opened from the upper end opening of the gap D between the inner and outer forms 5 and 6 by the hose 14 or the like.
And also concrete C ₂ by discarding the concrete 4 on the hose 15 or the like is also simultaneously or continuously, i.e., one of the concrete is pouring the other concrete before it hardens.

The concrete poured from the upper end opening of the space D flows inward from the concrete outlet 9 formed in the lower part, and the discharged concrete is mixed with the concrete directly poured on the waste concrete 4. Mix and combine. Then, as shown in FIG. 3, concrete C ₁ is poured to the upper part of the gap D, and concrete C ₂ for floor is poured to the height H of the concrete outlet 9 to finish the concrete placement. .

After the concrete has hardened, the support fittings 10, 11 and the oblique support 12 are removed, and as shown in FIG. 4, the outer mold 5, the inner mold 6, and the concrete 16 are integrated. A wall 18 and a concrete floor 19 that is seamlessly integrated with the concrete 16 are formed. In addition, the waterproof plate 13 fixed to the remaining support 2 is buried in the concrete floor 19, and waterproofing of the support 2 is achieved.

After the above-mentioned basement is formed, the root cut is buried back. FIG. 5 shows a second embodiment in which the floor, walls and ceiling of the basement are integrally formed. The present embodiment uses a mold in which the upper end 6b of the inner mold 6 in the first embodiment is formed shorter (lower) than the upper end 5b of the outer mold 5, and the outer mold 5 and the inner mold 6 are used. Is supported by the oblique support 12 in the same manner as in the first embodiment. Next, the ceiling form 2 is placed at the position of the upper end 6b of the inner form 6.
0 is arranged and supported by the shoring 21. The ceiling form 20 is made of precast concrete, and a reinforcing bar (omnia bar) 22 projects from the upper surface thereof.

In order to support the lower end of the support 21, a support 2 a similar to the support 2 is driven into the ground to stand upright.
The support 21 is detachably mounted on the upper end of the column 2a. Further, a water-stop plate 13a similar to the above-mentioned column 2 is fixed to the column 2a. Reinforcing bars are arranged on the discarded concrete 4.

In FIG. 5, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted. After thus setting the respective formwork, ceiling and wall concrete C ₁ into the gap D between the inner and outer mold 5,6, a floor concrete C ₂ on the concrete 4 abandoned, on the ceiling formwork 20 the concrete is C ₃ simultaneously or continuously.

After the concrete has hardened, the first
Supporting brackets 10 and 11 and oblique support 1 as in the embodiment
2 and the shoring 21 are removed. As a result, a basement is formed in which the concrete 16, the floor concrete 17, and the ceiling concrete 23, which are cast in the gap D between the inner and outer forms 5 and 6, are integrated without any joint.

FIG. 6 is an embodiment showing different arrangements of the reinforcing bars 7 in the outer formwork 5. In this embodiment, the truss bars 7a are formed in a tall shape so that their tops reach near the inner side of the inner mold frame 6, and the top bars 7
b is erected and fixed, and the horizontal main bar 7c and the vertical main bar 7d are fixed to the trunk. According to the present embodiment, the inner form 6 such as a wire mesh or a lath can be easily fixed to the top streak 7b by the binding wire 7e. Therefore, as shown in FIGS. 1 and 2, there is no need to erect bolts or the like 8 on the outer mold 5, and the manufacture of the mold and the assembly of the inner mold 6 are facilitated.

The outer mold 5 and the inner mold 6 in the first and second embodiments may be wooden molds or metal molds, respectively, and these may be tightly connected with a gap D. The ceiling form 20 in the second embodiment may be a wooden form or a metal form. In such a case, reinforcing bars are arranged in the gap D and on the ceiling form 20.

Further, the method of supporting the inner and outer forms 5 and 6 is shown in FIG.
As shown by the dashed line in FIG.
It may be supported by a.

[0029]

As described above, according to the first aspect of the present invention, concrete for walls and concrete for floors can be simultaneously or continuously poured. There is no need to do it over two days. Therefore, compared to the conventional method, the number of days for dispatching ready-mixed concrete trucks and pump trucks and the number of workers are shortened, and costs can be reduced.

Further, since the wall concrete and the floor concrete are tightly integrated without a joint to form a complete waterproof structure, there is no need to separately perform waterproofing treatment between these concretes. This solves the problem seen in the installation of a water stop plate in between. Therefore, it is effective as a molding method of a basement where the water pressure is large with the earth pressure.

According to the second aspect of the present invention, the wall concrete and the ceiling concrete are also tightly integrated without a joint, so that the waterproof property at this portion is also improved. According to the third aspect of the present invention, when the inner and outer molds are difficult to support from the outside and the inner and outer molds are supported from the inner side, the waterproofing of the support portion is ensured to reliably secure the inner and outer molds. I can support it.

According to the fourth aspect of the present invention, furthermore, it is possible to simplify the on-site installation and reinforcing work of the inner and outer formwork for forming the peripheral wall, and to improve the workability and shorten the construction period. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention and showing a state where a wall form is arranged and supported.

2A is a longitudinal sectional view of FIG. 1, and FIG. 2B is an enlarged partial longitudinal sectional view of a mold in FIG.

FIG. 3 is a longitudinal sectional view showing a state where concrete is cast in the state of FIG. 2;

FIG. 4 is a longitudinal sectional view showing a state in which a support or the like is removed after the concrete is hardened after the concrete is cast in FIG. 3;

FIG. 5 is a longitudinal sectional view showing a second embodiment of the present invention.

FIG. 6 shows another example of a reinforcing bar fixed to an outer formwork according to the present invention.

FIG. 7 is a longitudinal sectional view showing a conventional method.

[Explanation of symbols]

4 ... discarded concrete 5 ... outer frame 6 ... inner mold 9 ... concrete outlet 12 ... Support C ₁ ... wall concrete C ₂ ... Floor concrete D ... void

Continuation of the front page (51) Int.Cl. ⁶ Identification code FI E04B 2/86 611L (72) Inventor Kiyonori Yamauchi 65, Kamikasu-cho, Kamikomi-cho, Toyota-shi, Aichi Prefecture Toyota Soken Corporation

Claims (4)

[Claims] 1. An outer formwork for forming a peripheral wall is placed on and supported on discarded concrete, and an inner formwork for forming a peripheral wall is similarly supported at a distance from an upper surface of the discarded concrete.
At the lower end of this inner form, a concrete outlet communicating with the space between the inner and outer forms is formed, and concrete for the wall is placed in the space between the inner and outer forms, and concrete for the floor is placed on the discarded concrete simultaneously or continuously. A method for forming a concrete basement, wherein the two concretes are integrated without any joint. 2. An upper end of an inner mold for forming a peripheral wall is formed shorter than an upper end of an outer mold, and a ceiling form is arranged and supported at an upper end of the inner mold, and a gap between the inner and outer forms is provided. 2. The concrete according to claim 1, wherein the concrete for the wall and the concrete for the casting on the ceiling formwork are cast simultaneously or continuously and the two concretes are integrated seamlessly. Molding method for concrete basement. 3. A pillar is driven into the ground where a floor is formed to be erected, the pillar is subjected to a water stopping process, and a removable support is installed between the upper end of the pillar and the inner and outer forms. The method for forming a concrete basement according to claim 1 or 2, wherein the inner and outer forms are supported. 4. An outer mold for forming a peripheral wall is a thin PC plate having a reinforcing bar protruding from an inner surface side, and an inner mold is a perforated metal plate.
2. The method according to claim 1, wherein the parts are connected in advance at a factory.
Or the method of forming a concrete basement according to 2 or 3.