JPH03295978A - Pointing type outer waterproofing method and separator - Google Patents

Abstract

PURPOSE:To simplify the working process by setting up waterproofing sheet on an inner surface of an outer frame and a floor surface with the inner side protrusion end of a separator penetrated and protruded and holding the inner frame with the separators of the inner and outer frames connected respectively. CONSTITUTION:An outer frame 2 for a wall face is assembled on the leveling concrete on a floor face. In the next step, the frame 2 is fixed with a separator 5 with a washer 6 inserted into the separator hole of the frame and with a fixing member 15 mounted on the outside protrusion end 16 of the separator 5. Then, a water proofing sheet 4 is set up and held on the inner surface of the outer frame 2 and floor surface with the inside protrusion end 8 of the separator 5 penetrated and protruded. A steel bar 14 is assembled and concrete 12 is poured on the floor face. In addition, an inner frame 3 is connected and held with the separator 9 of the inner frame 3 and the separator 5 of the outer frame 2 connected by the cap nut 10, which is threadedly engaged with inside protrusion ends 8 and 11, and wall face concrete 13 is poured in both frames.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to improvements in waterproofing methods that are absolutely necessary in constructing concrete structures.

[Prior Art] When constructing a concrete frame, especially in the underground part, some kind of waterproofing treatment is required on the walls and floors in preparation for the infiltration of groundwater.

Conventionally, the waterproofing methods used to construct concrete structures with waterproofing treatment include applying it to the outside of the structure,
Waterproofing is divided into external waterproofing and internal waterproofing depending on whether it is applied to the interior, and waterproofing is classified as retrofitting and waterproofing is prefixing depending on whether it is applied after or before building the frame.

Internal waterproofing has the advantages of a large work space, short process, and relatively low construction costs, but from the perspective of the original purpose of waterproofing, it is difficult to prevent water from entering the outside of the structure. is preferred. Therefore, for the purpose of waterproofing, external waterproofing is recommended.

[Problems to be Solved by the Invention] By the way, conventional external waterproofing has the following drawbacks and difficulties.

<First attachment is external waterproofing> External waterproofing involves placing a waterproof sheet on the excavated surface or earth retaining surface, constructing an inner formwork, and pouring concrete. It has the advantage that waterproofing can be done in one step, but if the excavated surface is soil, the amount of concrete will be large and it will be uneconomical, and if the surface that has been sealed with soil is sheet piles etc., it will be difficult to use concrete. Although it was possible to ensure a uniform thickness, it was uneconomical because it would be buried in the soil.

Retrofitting is for external waterproofing> Due to the cost problem of earth retaining for external waterproofing,
This is a commonly used construction method, but since it is a construction method in which waterproofing is applied after constructing the concrete frame, it has the disadvantages of a small work space and unstable scaffolding. There was a drawback that the entire process was divided into two steps and took a long time.

This will be explained according to specific process steps as follows.

(1) Place concrete for the floor surface.

(2) Waterproof the floor surface using a waterproof sheet. in this case,
Leave extra width so that it can be wrapped with the waterproof sheet on the wall when waterproofing the wall later. Curing with polyethylene sheets, etc.

(3) Arrange floor reinforcement.

(4) Assemble the floor formwork.

(5) Place concrete for the floor.

(6) Remove the floor formwork.

(7) Build scaffolding.

(8) Arrange wall reinforcement.

(9) Assemble the inner and outer forms of the wall and secure them with steel pipes, etc.

(10) Place concrete for the wall.

(11) Remove the inner and outer formwork of the wall.

(12) Repair any junk on the wall with mortar.

(13) Clean, clean, and repair the seat section on the floor.

(14) Waterproof the wall. Curing with polyethylene sheets, etc.

(15) Remove the scaffolding.

(16) Backfill the wall with soil.

As is clear from the above, two steps were required to waterproof the floor and the walls, and the process as a whole was complicated. Also,
Another drawback is that there is a seam between the waterproofing of the floor and the waterproofing of the walls.

Additionally, when waterproofing the walls, the work space was narrow and the scaffolding was unstable.

Therefore, the purpose of this invention is to adopt an external waterproofing construction method that can waterproof floors and walls in one process, and also to make it easier to take up work space, and to avoid burying the inner and outer formwork. The advantage of this method is that it provides an external waterproofing method that eliminates the need for internal waterproofing.

Furthermore, this pre-applied material provides a separator that is most suitable for external waterproofing methods.

[Means for Solving the Problems] The present invention achieves the above object by using a special separator that fixes the inner and outer molds.

That is, the first external waterproofing method according to the present invention assembles an external formwork for the wall on the concrete of the floor surface, and utilizes the external protruding end of the separator with a washer passed through the separation hole of this formwork. A waterproof sheet carrying bentonite at least in the separator portion is stretched over the inner surface of the outer formwork and the floor surface by penetrating the inner protruding end of the separator, and is screwed into the presser foot from the inner protruding end. Hold the sheet between the washer and the washer of the separator, and after pouring the floor concrete, assemble the inner formwork and connect the separators of the inner formwork and the separator of the outer formwork to hold the inner formwork. A waterproofing method involves pouring wall concrete into both formworks and removing the inner and outer formwork.

The separator used in this construction method has a washer that comes into contact with the inner surface of the formwork, and the outer protruding end that protrudes through the separation hole of the outer formwork serves as the connecting end for fixing the formwork, and the inner protruding end has the washer. A presser washer for fixing the waterproof sheet between the inner formwork and a cap nut for connecting the separator protruding from the inner formwork is screwed together.

A good tarpaulin sheet is one whose main material is bentonite.
For example, it is recommended to use bentonite sandwiched between non-woven fabrics or bentonite attached to a high-density polyethylene sheet. However, it is not necessarily necessary to support bentonite over the entire waterproof surface, and bentonite may be supported at least on the separator portion, and the other portions may be a sheet with a generally used waterproof structure.

[Function] According to the external waterproofing construction method, floor waterproofing and wall waterproofing can be performed from the inside of the building at the same time, similar to internal waterproofing, which simplifies the work process. Easy to take up space. Internal and external formwork is more economical than internal waterproofing because it is removed after construction.

In the separator penetrating portion, since the waterproof sheet holding bentonite is held by a washer and a presser washer, there is no water leakage due to the good water-stopping effect of bentonite.

[Example] Hereinafter, embodiments shown in the accompanying drawings will be described.

Figures 1 and 2 show the construction status of the exterior waterproofing method according to the present invention. Formwork, 4
is a waterproof sheet carrying bentonite, 5 is a separator, 6 is a washer for holding the formwork attached to the separator, 7
9 is a presser washer for the waterproof sheet that is screwed together from the inner protruding end 8 of the separator; 9 is a separator that protrudes from the inner formwork 3;
10 is a cap nut screwed onto the inner protruding end 8 of the separator 5 and the inner protruding end 11 of the separator 9 to connect them;
2 is floor concrete, 13 is wall concrete, 14
15 is the reinforcing bar, and 15 is the outer protruding end 16.1 of the separator 5.9.
This is the fixing member attached to 7.

To explain the construction procedure of the external waterproofing method according to the present invention, first, concrete 1 for the floor is poured, and an external form 2 for the wall is assembled on top of this.

A separator 5 with a washer 6 is inserted into the separation hole of this formwork, and a fixing member 15 is attached to the outer protruding end 16 of this separator to fix the formwork. Next, the waterproof sheet 4 mainly made of bentonite is placed on the inner protruding end 8 of the separator 5.
project through and extend over the inner surface and floor surface of the outer formwork 2,
The sheet 4 is held between a presser washer 7 and a separator washer 6 screwed together from the inner protruding end 8. After properly curing the waterproof surface with a polyethylene sheet or the like, reinforcing bars 14 for the floor are installed and floor concrete 12 is poured. Next, the inner formwork 3 is assembled, and the inner formwork is held by connecting the separator 9 of the inner formwork and the separator 5 of the outer formwork with a cap nut 10 screwed onto the inner protruding ends 8 and 11. Wall concrete 13 within the frame
to be poured. After that, the inner and outer formwork and the scaffolding used are removed and the wall surface is backfilled with soil.

The waterproof sheet for the separator portion may be made, for example, by making a cross-shaped cut so that the inner protruding end 8 of the separator protrudes through it.

FIG. 3 is a detailed view of the separator 5, which has a washer 6 that comes into contact with the inner surface of the outer formwork 2, and a threaded groove is formed on the outer protruding end 16 that protrudes through the separator hole of the outer formwork. This serves as the connecting end of the formwork fixing member 15. A presser washer 7 for fixing the waterproof sheet 4 between the inner protruding end 8 and the washer 6 can be screwed together, and a cap nut 10 for connecting a separator 9 protruding from the inner formwork 3 can be screwed into the inner protruding end 8. It is possible.

[Effects of the Invention] The external waterproofing method according to the present invention has the following effects.

■Floor waterproofing and wall waterproofing can be done from inside the building at the same time, just like internal waterproofing, which simplifies the work process and saves space.

■It is economical because the inner and outer formwork are removed after construction.

■There is no risk of water leakage from the separator penetration part due to the good water-stopping effect of bentonite.

■Since the outer surface of the frame is covered with a waterproof sheet, there is no need to repair the separator part or the jumper.

■Since the outer formwork does not come into direct contact with concrete, there is no need for cleaning and maintenance work, and it can always be used like new.

■There is no seam of the waterproof sheet between the floor and wall,
Highly waterproof.

Further, the separator according to the present invention is a separator that is most suitable for use in the above-mentioned external waterproofing method.

[Brief explanation of drawings]

FIG. 1 is a construction state diagram showing an example of the first external waterproofing method according to the present invention, FIG. 2 is an enlarged view of the part where the separator is used, and FIG. 3 is a detailed view of the separator. 13...Wall concrete 14...Reinforcement bar 15...Fixing member 16.17...External protruding end

Claims (2)

[Claims] (1) Assemble an outer formwork for the wall on the concrete on the floor surface, and fix the formwork using the outer protruding end of the separator with a washer passed through the separation hole of this formwork, so that at least the separator part A waterproof sheet carrying bentonite is stretched over the inner surface of the outer formwork and the floor surface with the inner protruding end of the separator protruding through, and the sheet is held between the presser washer screwed from the inner protruding end and the washer of the separator. After placing the floor concrete, the inner formwork is assembled, and the inner formwork is held by connecting the separators of the inner formwork and the separator of the outer formwork.
A pre-installed external waterproofing method in which wall concrete is poured into both formworks and the inner and outer formwork are removed. (2) It has a washer that comes into contact with the inner surface of the formwork, and the outer protruding end that protrudes through the separation hole of the outer formwork is used as the connecting end for fixing the formwork, and the inner protruding end has a waterproof seal between it and the washer. A separator for pre-installed external waterproofing method in which a presser washer that fixes the sheet is screwed together with a cap nut that connects the separator that protrudes from the inner formwork.