JP3650791B2 - Construction method of concrete structure and driving form material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction method for a concrete structure such as a parapet, a tower outer peripheral wall and a machine foundation constructed on the rooftop of the structure, and a driving mold material.
[0002]
[Prior art]
Conventionally, in the construction of building buildings, form plates made of plywood have been used as form materials, but in recent years, for purposes such as resource conservation of south sea timber and labor saving of formwork construction, Construction of a concrete frame is being carried out by using a synthetic resin, metal, or cement mortar form plate instead of the plywood form plate.
By the way, parapets and machine foundations on the roof of buildings need to be provided with complicatedly shaped jaws for the purpose of draining and waterproofing on the side surfaces. A cast-in mold plate made of cement mortar that does not require removal is used. In other words, this driving form plate is disposed on the side surface portion of the structure and used as a part of the structure together with the placed concrete.
[0003]
[Problems to be solved by the invention]
By the way, when placing the casting form plate as described above and placing concrete, the breathing phenomenon occurs in the upper surface portion over time until the concrete is hardened, and the drying shrinkage of the concrete at the top end portion after hardening is caused. growing. Therefore, there is a gap between the cast formwork board and the hardened concrete at the top edge, and if rainwater enters from this gap, the rainwater leaks into the building, corrosion of the reinforcing bars in the structure, etc. There is a risk of causing. This gap has to be filled with a caulking material such as silicon to stop the water, and there is a problem that the water stopping work requires a lot of labor and cost.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a concrete structure construction method and a driving mold material capable of reliably preventing water leakage to the inside.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the concrete construction method according to claim 1 is characterized in that a placing mold material embedded together with the concrete to be placed is installed, and a concrete placing place surrounded by the placing mold material. A construction method of a concrete structure in which concrete is placed and cured and cured, and a sealing material having elasticity is attached in advance in the longitudinal direction to the concrete placing surface side at the upper end of the placement mold member. It is characterized by that.
The construction method for a concrete structure according to claim 2 is characterized in that, in the construction method for a concrete structure according to claim 1, a protective member having excellent weather resistance is attached in advance to the upper portion of the sealing material.
[0006]
The drive-in form material according to claim 3 is a drive-in form material embedded together with the concrete to be placed, and a sealing material having elasticity in the longitudinal direction is attached to the concrete placement surface side at the upper end. It is characterized by being.
According to a fourth aspect of the present invention, there is provided a driving mold material according to the third aspect, wherein a protective member having excellent weather resistance is provided above the sealing material.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a concrete structure construction method and a driving mold material according to the present invention will be described below with reference to the drawings.
In FIG. 1, the code | symbol 1 is the parapet (concrete structure) constructed | assembled on the rooftop of the building. The parapet 1 has an inner side surface formed by a driving mold material 2, and concrete C is driven on a concrete casting surface side composed of one side surface of the driving mold frame material 2. The mold material 2 is integrated. Further, the parapet 1 has a reinforcing bar 4 disposed therein.
The driving mold member 2 is formed by connecting a lower mold member 5 and a jaw mold member 6 by a connecting mold member 7, and the lower mold member 5, the connecting mold member 7, and the jaw mold member. 6 are respectively connected by an H-shaped connecting member 8.
The lower mold member 5, the jaw mold member 6, and the connecting mold member 7 are each formed from a ceramic material-based inorganic extruded plate formed by extrusion molding.
For example, this inorganic extrusion-molded plate is made by blending cement, aggregate, cinnabar sand, reinforcing fibers, fluidizing agent, water, etc. at a predetermined ratio and extruding with an extruder, followed by high-pressure steam curing (autoclave curing). This is a strength developed.
[0008]
A jaw part 11 is formed on the jaw mold member 6 constituting the driving mold member 2, and a draining part 12 and an inner side of the draining part 12 are formed on the lower surface side of the jaw part 11. A plate material fitting groove (fitting groove) 13 is provided, and a protective wall 14 is fitted into the plate material fitting groove 13.
Further, on the inner surface side at the upper end of the jaw mold member 6, an elastic sealing material 21 is provided in the longitudinal direction as shown in FIG. Is provided with a protective member 22 formed of a material excellent in weather resistance (a metal plate excellent in corrosion resistance, a resin plate such as ethylene propylene deene terpolymer (EPDM)).
Here, as the sealing material 21, for example, butyl rubber, chloroprene rubber, silicon rubber or the like having adhesiveness or adhesion is used.
In FIG. 1, reference numeral 23 is an asphalt waterproofing layer, reference numeral 24 is a heat insulating material, reference numeral 25 is a cushioning material, and reference numeral 26 is protective concrete.
[0009]
Next, the construction work of the parapet 1 using the above-mentioned driving form material 2 will be described with reference to FIG.
(1) First, reinforcing reinforcing bars 4 are disposed at the construction site of the parapet 1 on the roof of the building.
(2) Next, a smooth surface mold plate 31 is disposed outside the reinforcing reinforcing bars 4, and the driving mold material 2 is disposed inside, and the mold plate 31 and the driving mold plate are disposed. 2 are connected and positioned by a connecting member 33 including a separator hardware 32.
(3) In this state, concrete C is placed in a portion surrounded by the mold plate 21 and the driving mold plate 2.
In this way, the poured concrete C is sequentially filled between the mold plate 31 and the driving mold frame material 2 from below, and further overflows into the upper end portion of the driving mold frame material 2, and also on the upper end portion. The concrete C is filled, and the concrete C is hardened and cured, and the connecting member 33 is removed to remove the mold plate 31, thereby constructing the parapet 1 made of the mold material 2 on the inner surface side.
[0010]
(4) After hardening and curing the placed concrete C, the asphalt waterproof layer 23 is disposed on the top surface of the roof, and further, the heat insulating material 24, the cushion material 25 and the protective concrete 26 are disposed, and the asphalt waterproof layer 23 is disposed. The protective wall 14 is fitted and attached to the plate material fitting groove 13 so as to cover the end of the plate.
By performing the above operations (1) to (4), the parapet 1 in which the inner surface side is formed in a complicated shape can be constructed very easily.
[0011]
And since this sealing mold material 2 has the sealing material 21 previously attached to the inner surface side at the upper end of the jaw mold member 6, the concrete C when the cast concrete C is cured and cured. Even if the upper part of the mold is dried and contracted, the formation of a gap between the casting mold material 2 and the concrete C is prevented in advance, and a parapet 1 that is in a very good state without the invasion of rainwater is constructed. Can do.
In addition, since the protective member 22 having weather resistance is provided on the upper portion of the sealing material 21, the influence of the weather of the sealing material 21 that is relatively inferior in weather resistance (influence of wind and rain, sunlight, etc.) is greatly reduced. Thus, the sealing state by the sealing material 21 can be maintained for a long time.
In addition, since the seal material 21 is attached to the driving mold material 2 in advance, the cost increase for obtaining the seal structure can be minimized, which is extremely economical.
In the above example, the parapet 1 constructed on the roof has been described as an example of the concrete structure constructed using the drive-in form frame material 2. However, the concrete structure constructed using the drive-in form frame material 2 is described. As a matter of course, the present invention can be applied not only to the parapet 1 but also to, for example, a machine foundation on which a machine installed on the roof is installed.
[0012]
【The invention's effect】
As described above, according to the construction method of the concrete structure and the driving form material of the present invention, the following effects can be obtained.
According to the construction method of a concrete structure according to claim 1, even if the upper part of the concrete is dried and contracted when the cast concrete is cured and cured, the concrete casting surface side at the upper end of the cast formwork material Since the sealing material having elasticity in the longitudinal direction is attached in advance, the gap between the placing frame material and the concrete is surely sealed by the sealing material, and rain water can be prevented from entering.
Therefore, after the concrete is hardened, compared to the case where the sealing material is filled into the gap formed between the casting formwork material and the concrete, the labor required for the sealing work can be greatly reduced. Therefore, the work period can be shortened.
According to the construction method for a concrete structure according to claim 2, since a protective member having excellent weather resistance is attached to the upper part of the seal material, the seal material having relatively weak weather resistance is protected from wind and rain, sun rays, and the like. As a result, the service life can be extended and a good seal structure can be maintained over a long period of time.
[0013]
According to the casting mold material of claim 3, even when the cast concrete is cured and cured, even if the upper part of the concrete is dried and contracted, the longitudinal direction is directed to the concrete casting surface side at the upper end of the casting mold material. Since the sealing material having elasticity is attached over the entire space, the gap between the placing frame material and the concrete is surely sealed by the sealing material, and the intrusion of rainwater can be surely prevented.
Therefore, after the concrete is hardened, compared to the case where the sealing material is filled into the gap formed between the casting formwork material and the concrete, the labor required for the sealing work can be greatly reduced. Therefore, the work period can be shortened.
In addition, since the structure is a very simple structure in which the sealing material is previously attached to the driving form material, the cost increase for obtaining the sealing structure can be minimized, which is extremely economical.
According to the driving form material of claim 4, since the protective member having excellent weather resistance is attached to the upper part of the seal material, the seal material having relatively weak weather resistance is protected from wind and rain, solar rays, and the like. The service life can be extended and a good seal structure can be maintained over a long period of time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a parapet for explaining a construction method of a concrete structure and a configuration and structure of a driving mold material according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of a parapet for explaining a construction method of a concrete structure and a configuration and structure of a driving mold material according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a parapet in the middle of explaining a construction method for a concrete structure according to an embodiment of the present invention.
[Explanation of symbols]
1 Parapet (concrete structure)
2 Placing frame material 21 Sealing material 22 Protection member

Claims (4)

Installed the formwork material embedded with the concrete to be placed,
It is a construction method of a concrete structure in which concrete is placed and hardened and cured at a concrete placement location surrounded by the casting mold material,
A construction method of a concrete structure, wherein a sealing material having elasticity is attached in advance in a longitudinal direction to a concrete casting surface side at an upper end of the placing mold material. The construction method for a concrete structure according to claim 1, wherein a protective member having excellent weather resistance is attached in advance to the upper portion of the sealing material. A cast formwork material embedded with the concrete to be placed,
A casting mold material characterized in that a sealing material having elasticity in the longitudinal direction is attached to a concrete casting surface side at the upper end. 4. The driving mold material according to claim 3, wherein a protective member having excellent weather resistance is provided on an upper portion of the sealing material.

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