JPH0726412B2 - Construction method of concrete using waterproof frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a concrete construction method using a waterproof frame.

[Prior Art] Conventionally, in a concrete structure, a water blocking frame is used to prevent water leakage, the water blocking frame is installed at a concrete pouring place, and concrete is poured so as to fit into the water blocking frame. A concrete wall will be formed and the water-stop frame will be fixed to the concrete wall. In this construction method, the problem of water leakage from the concrete wall can be improved by the water blocking frame.

[Problems to be Solved by the Invention] In the construction method described above, although the problem of water leakage from the concrete wall is improved by the water blocking frame, expansion and contraction of concrete due to temperature change, curing shrinkage of concrete, and casting of concrete. Water may leak from the boundary between the water blocking frame and the concrete wall due to insufficient construction. In this case, it is conceivable to inject the sealing agent into the boundary area between the concrete wall and the water blocking frame, but after the concrete is solidified, an injection hole for injecting the sealing agent must be formed in the water blocking frame.

Further, when the water leakage resistance is sufficient and it is not necessary to inject the sealant at the boundary portion between the concrete wall and the water blocking frame, it is not necessary to form the injection hole in the water blocking frame.

The present invention has been made in view of the above conventional circumstances, and an object thereof is to seal a boundary portion between a water blocking frame and a concrete wall by using a water blocking frame having an injection hole that can be opened and closed by a closing tool. An object of the present invention is to provide a method for constructing concrete using a waterproof frame that can be applied when injecting an agent.

[Means for Solving the Problems] A method of constructing concrete using a waterproof frame of the present invention is a frame portion provided with a projecting portion that regulates the intrusion of concrete and forms a groove-shaped space portion, and the thickness of the frame portion. Use a water stop frame that has an injection hole formed at a position that penetrates in the direction and can communicate with the groove-shaped space and a closure that can open and close the injection hole, and stop the injection hole with the closure. The installation process to install the water frame on the concrete formwork installed at the concrete driving place, and the concrete wall to be joined to the frame part of the water blocking frame by pouring concrete into the concrete frame installed at the concrete driving place to solidify. At the same time as the formation, a pouring process to form a groove-shaped space where concrete is prevented from entering by the projection of the waterproof frame at the boundary between the waterproof frame and the concrete wall, and from the injection hole with the closure removed. ,flow A sealing agent having a property is injected into the groove-shaped space portion at the boundary portion between the water blocking frame and the concrete wall, and a sealing step of sealing the boundary portion is sequentially performed.

The waterproof frame used in the present invention is a frame part having a predetermined cross-sectional shape and extending along the end face of a concrete wall, an injection hole penetrating the frame part in the thickness direction, and a closure for opening and closing the injection hole. With and. The frame portion includes a protruding portion that restricts the entry of concrete and forms a groove-shaped space portion. The opening area of the injection hole is appropriately set as needed. The injection hole is
It is desirable that a suitable number of water-blocking frames be arranged in parallel at a predetermined interval along the length direction. The closing tool closes the opening of the injection hole, and can be formed by, for example, a bolt, a pin, a cover plate, or the like.

In the installation process, the water blocking frame is held and installed in the concrete formwork installed at the concrete pouring place, with the injection hole in the frame part of the water blocking frame being closed by the closing tool. In the pouring process, concrete is poured into a concrete form to solidify it, thereby forming a concrete wall that is joined to the frame portion of the waterproof frame. At this time, due to the restricting action of the protruding part of the frame part, the good friend of the concrete having fluidity is restricted, and the groove-shaped space part is formed at the boundary between the concrete wall and the frame part.

In the construction method of the present invention, after the pouring process is completed, the boundary portion between the water blocking frame and the concrete wall can be communicated with the outside air by opening the injection hole with the closing tool of the water blocking frame.
Therefore, if you want to further improve the sealability between the water blocking frame and the concrete wall, such as when water leakage is found from the boundary between the water blocking frame and the concrete wall, The injection hole is opened by the closing tool of the water blocking frame, and further,
It is possible to perform a sealing step of pressing the sealing agent having fluidity into the boundary portion between the frame portion of the water blocking frame and the concrete wall through the opened injection hole to seal the boundary portion. As the sealant to be press-fitted, those which have fluidity at the time of press-fit and are cured thereafter, such as rubber and resin, specifically silicon rubber, and foaming urethane can be adopted. In particular, those having a large swelling property and those having a good fluidity or permeability are preferable from the viewpoint of ensuring the sealing property. If necessary, a vulcanizing agent, a vulcanization accelerator, a filler, an antioxidant, a foaming agent, a plasticizer, a curing agent and the like can be added to the rubber.

[Example] Hereinafter, a concrete construction method using the waterproof frame of the present invention will be described according to an example shown in the drawings.

First, the waterproof frame used in the construction method of this embodiment will be described. The water blocking frame 1 is made of steel and extends long. The frame portion 10 of the water blocking frame 1 has a cross-sectional shape and is formed by a first horizontal plate portion 100, a first vertical plate portion 101, a second horizontal portion 102, and a second vertical plate portion 103. On the inner surface side of the first horizontal plate portion 100, a rod-shaped protruding portion 11 for forming a groove-shaped space portion 2a for storing air is provided.
Are fixed by welding along the length direction of the water blocking frame 1.
An injection hole 12 having a female screw is formed to penetrate through the first horizontal plate portion 100 of the frame portion 10 of the water blocking frame 1 in the thickness direction. As shown in FIG. 3, a large number of injection holes 12 are juxtaposed along the length direction of the frame portion 10 of the water blocking frame 1 at predetermined intervals. In a normal state, each injection hole 12 is closed by a bolt-shaped closing tool 13.

In the installation process, the water blocking frame 1 is held and installed in the concrete formwork installed in the concrete pouring place. Then, in the pouring process, by pouring concrete into the concrete formwork installed at the concrete pouring place, the concrete is poured to the one surface 10a side of the frame portion 10 of each water-stop frame 1 to pour the concrete. Thus, the concrete wall 2 joined to the one surface 10a side of the frame portion 10 of each water blocking frame 1 is formed.

After making a statement in this way, as shown in FIG. 1, a plate-like jointing agent 30 is interposed between two water-stop frames 1, and further, a U-shaped central portion 31a and a piece portion 31b are formed. The main body rubber 31 made of is held in a state of straddling the two water blocking frames 1. Also, the main body rubber 31
On the upper surface of, the long inner adjustment bar 32 is attached with the mounting bolts 33,
Hold through the mounting nut 34.

When concrete is placed in the placing step, the air pushed by the concrete moves along one surface 10a of the frame portion 10 of the water blocking frame 1. Furthermore, the movement of the air is restricted by the protruding portion 11,
Therefore, air is pushed into the portion of the water blocking frame 1 defined by the first horizontal plate portion 100 and the projecting portion 11, and as a result, the groove-shaped space portion 2a in which the concrete is prevented from entering is aligned with the injection hole 12. It is formed along the installation direction.

Further, in order to improve the sealing property, the closure 13 is removed from the injection hole 12 of the first horizontal plate portion 100 of the water blocking frame 1 to open the injection hole 12, and the opened injection hole 12 functions as a sealant. A rubber having a predetermined composition is press-fitted into the groove-shaped space 2a which is a boundary portion between the water blocking frame 1 and the concrete wall 2 to be solidified.
As a result, as shown in FIG. 2, the groove-like space 2a has a seal portion.
Form 36. As a result, the waterproof frame 1 and the concrete wall 2
The boundary portion between and is sealed, and the water stop hardening by the water stop frame 1 is further enhanced. Once the seal 36 is formed, the closure
Reattach 13 to inlet 12.

Although rubber was used as the sealant in the above-mentioned examples,
It is not limited to this.

[Effect of the Invention] According to the concrete construction method using the water blocking frame of the present invention, in order to improve the sealing property of the boundary portion between the concrete wall and the water blocking frame, the injection hole is opened by the closing tool. If the sealing agent is loaded into the boundary part between the concrete wall and the water blocking frame through the opening injection hole, the sealing property of the boundary part between the concrete wall and the water blocking frame can be improved, and the water blocking effect of the water blocking frame can be improved. Can increase. In addition, if the water leakage resistance is sufficient and it is not necessary to load the sealant and it is sufficient as it is, leave the closing device attached to the water blocking frame and leave the injection hole closed with the closing device. be able to.

That is, according to the concrete construction method using the waterproof frame according to the present invention, when it is necessary to inject the sealant,
It is possible to deal with the case where the seal first injection is not necessary.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a cross-sectional view of a concrete wall in a state where a casting process is performed, and FIG. 2 is a cross-sectional view of a concrete wall in a state where a sealing process is performed.
FIG. 3 is an enlarged perspective view of an essential part in a state where the sealing process is performed. In the figure, 1 is a waterproof frame, 10 is a frame part, 12 is an injection hole, 13 is a closure, 2 is a concrete wall, and 36 is a seal part.

Claims (1)

[Claims] 1. A frame portion having a projecting portion that regulates the intrusion of concrete to form a groove-shaped space portion, and a frame portion that penetrates the frame portion in the thickness direction and can communicate with the groove-shaped space portion. Using a water blocking frame having a filling hole and a closing tool capable of opening and closing the filling hole, the water blocking frame with the filling hole closed by the closing tool,
An installation process of installing in a concrete formwork installed at a concrete driving place, and concrete is poured and solidified in the concrete frame installed at the concrete driving place to form a concrete wall to be joined to the frame portion of the waterproof frame. In addition, at the boundary portion between the water-stop frame and the concrete wall, a placing step of forming a groove-shaped space portion in which the intrusion of concrete is prevented by the protrusion of the water-stop frame, and the closure is removed. A sealant having fluidity is injected from an injection hole into the groove-shaped space at the boundary between the water blocking frame and the concrete wall, and a sealing step of sealing the boundary is sequentially performed. A concrete construction method using a waterproof frame.