JPH02153176A - Mounting method of water-proofing and corrosion resisting sheet - Google Patents

Abstract

PURPOSE:To increase durability by driving an anchor into a draw member of thermoplastic resin inserted into an excavated hole, and supporting a water- proofing and corrosion resisting sheet to be spread over a concrete wall on a collar section formed by welding a projected part of a draw member. CONSTITUTION:A draw member 2 is thermoplastic resin is inserted into an excavated hole 3 formed on a concrete wall 1 such as a water storage tank and the like. After that, after inserting an anchor 4 into the member 2, a water- proofing and corrosion resisting sheet 6 is spread over the surface of the wall 1, the end of the member 2 is inserted into an insertion hole 7 made in correspondence with the excavated hole 3. The end of the member 2 projected from the hole 7 is heated and melted to form a screw head shaped collar section 8, and it is combined with the member 2 and the sheet 6 as a unit. Accordingly, the sheet is mounted on the wall surely and, at the same time, a mounting state can be kept for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for attaching a waterproof and corrosion-resistant sheet to a concrete wall surface of a water storage tank for water supply, a septic tank for sewage, etc.

[Conventional technology]

Traditionally, water storage tanks for clean water and septic tanks for sewage.

The concrete walls of receiving wells, atomization tanks, settling tanks, sludge receiving tanks, and allantoic tanks are lined with resin such as epoxy resin or polyester resin to ensure corrosion resistance and prevent water leakage. ing. In particular, epoxy resin is a resin in which the epoxy group is polymerized and cured by polyhydric alcohol, and because of its ability to three-dimensionally crosslink, it is widely used for adhesives and paints, and has extremely high adhesive strength and water resistance. It is widely used for waterproofing because of its high properties.

By the way, the durability of the resin lining such as epoxy resin for the inner surface of the water tank body is relatively short at 5 to 10 years, and since it is constructed on-site, it is difficult to work in a narrow space and the resin layer may peel off. There was a problem in that reliability was unavoidable. On the other hand, in response to this, a method has also been proposed in which a waterproof and corrosion-resistant sheet used in industrial waste disposal sites is attached to the inner circumferential surface of the tank body using rivets.

[Problem to be solved by the invention]

However, in the conventional method of installing waterproof and corrosion-resistant sheets, when metal chains such as stainless steel are used, the sheet cannot be maintained for a long time due to weakening and corrosion due to quality deterioration, and hastelloy and titanium chains are used. The ones used are expensive. In addition, studs made of thermosetting resin are difficult to shape, and there are practical problems in that they plastically deform after being driven into a concrete wall and then easily fall off, resulting in incomplete sheet retention.

This invention was made in view of these conventional problems, and it is possible to reliably achieve waterproof and corrosion-proofing effects on concrete walls such as water storage tanks, and to maintain the waterproof and corrosion-resistant sheet stably for many years. The purpose of the present invention is to provide a method for installing a waterproof and corrosion-resistant sheet.

[Means to solve the problem]

The method for installing a waterproof and corrosion-resistant sheet according to the present invention involves inserting a thermoplastic resin tension member into a hole formed in a concrete wall, and anchoring the tension member within the tension member to prevent it from falling out of the hole. A collar is formed by driving a waterproof and corrosion-resistant sheet, which is laid on the concrete wall surface before and after driving the anchor or inserting the tension member, by heat-melting the portion of the tension member that protrudes outward from the concrete wall surface. It is designed to be held by the parts.

[Effect]

The anchor according to the present invention is press-fitted into a tension member inserted into a hole in a concrete wall and expands outward, thereby strengthening the bond between the tension member and the concrete wall. In addition, since the tension member is made of thermoplastic resin, by thermally melting the part of the tension member that protrudes from the concrete wall, it is possible to form a flange that suppresses the waterproof and corrosion-resistant sheet laid on the concrete wall. Installation to concrete walls is stable and strong.

〔Example〕

An embodiment of the present invention will be specifically described below with reference to the drawings. Figures 1 (a) to (e) are work process diagrams illustrating step-by-step the construction method of pasting waterproof and corrosion-resistant sheet 1- on the concrete wall of a water tank, for example.
2 is a concrete wall of the water tank, 2 is a cylindrical tensile material for forming the tensile action of the thermoplastic resin inserted into the drilled hole 3 of the concrete wall 1 and a flange described later, and 4 is a cylindrical tensile material driven into the tensile member 2. 5 is the driving rod of the anchor 3, 6 is the anchor that is press-fitted into the concrete wall 1 by the tension member 2.
It is a waterproof and corrosion-resistant sheet that is held on the surface of.

Next, a method of attaching the waterproof and corrosion-resistant sheet 6 to the concrete wall 1 will be explained with reference to the work flow diagram shown in FIG. 1.

First, a hole 3 of a predetermined depth is formed in a concrete wall 1 of a water storage tank or the like using an excavator, as shown in FIG. 1(a). Incidentally, a plurality of holes 3 are provided at average intervals over the entire surface of the concrete wall.

Next, polyvinyl chloride, EPDM is applied to each hole 3 thus formed.

A tension member 2 made of a thermoplastic resin such as high-density polyethylene or ultra-high molecular weight polyethylene is inserted as shown in FIG. 1(b). Note that this tension member 2 can be arbitrarily selected and used, such as one having a bottom at the tip and being closed, as shown in the figure, or one having a complete cylindrical shape without a bottom.

Next, prepare an anchor 4 whose maximum outer diameter is larger than the inner diameter of the tension member 2, insert it from the open end of the tension member 2, and insert the anchor 4 into the tension member facing the inner wall of the drilled hole 2. Push it inside 2. This pushing is the first
This is done by hitting one end of the anchor 4 with the driving rod 5 and pressing or striking it, as shown in Figure (c). In this embodiment, the shape of the plug 4 is a truncated cone. After driving anchor 4 in this way,
The driving rod 5 is removed from the tension member 2 as shown in FIG. 1(d), leaving the anchor 4 remaining inside the tension member 2. In such a state, the anchor 4 strongly presses the tension member 2 into the drilled hole 3, so the tension member 2
will never come out of drill hole 3. Next, a waterproof and corrosion-resistant sheet 6 is spread out on the surface side of the concrete wall 1, and insertion holes 7 are made in the parts corresponding to each drilled hole 3.
The tip of the tension member 2 fitted in the drilled hole 3 is inserted into these insertion holes 7 as shown in FIG. 1(d),
The waterproof and corrosion-resistant sheet 6 is brought into contact with the surface of the concrete wall 1. Next, the tension member 2 protruding from the insertion hole 7
The tip is heated, melted, and crushed to form a thread-like flange 8 as shown in FIG. 1(s). At this time, the flange 8 presses the waterproof and corrosion-resistant sheet 6 against the surface of the concrete wall 1. In this case, if the tension member 2 and the waterproof and corrosion-resistant sheet 6 are made of the same or similar materials, the collar portion 8 can be integrally heat-sealed to the waterproof and corrosion-resistant sheet.

In this way, the above-mentioned waterproof and corrosion-resistant sheet 6 can be uniformly attached to the inner wall and bottom of the water tank 11, as shown in FIG.
And corrosion of the concrete bottom can be effectively prevented. In addition, in Figure 2, 12 is a manhole, 13
14 is a water intake hole, and 14 is a drainage hole. In the above embodiment, the waterproof and corrosion-resistant sheet 6 is provided on the concrete wall 1 and the concrete bottom 15, which are the circumferential sides of the water tank 11, but by covering the ceiling part 16 as well. It is also possible to reliably prevent corrosion of concrete ceilings caused by chlorine gas contained in tap water.

〔Effect of the invention〕

As described above, according to the present invention, a tension member made of thermoplastic resin is inserted into a hole formed in a concrete wall, and an anchor having a maximum outer diameter larger than the inner diameter of the tension member is driven into the tension member. .

The waterproof and corrosion-resistant sheet laid on the concrete wall surface before and after driving the anchor or inserting the tension member is held by a flange formed by heat-melting the portion of the tension member that protrudes outward from the concrete wall surface. As a result, the above-mentioned waterproof and corrosion-resistant sheet can be securely attached to the concrete wall without easily coming off, and the tension members will not corrode even after installation, so the secure installation condition can be maintained for many years. The effect is that it can be maintained and maintained over a period of time.

[Brief explanation of the drawing]

FIG. 1 is a work process diagram showing a method of installing a waterproof and corrosion-resistant sheet according to the present invention, and FIG. 2 is a sectional view showing a water tank to which a waterproof and corrosion-resistant sheet is attached. 1. Concrete wall, 2. Tension member, 3. Hole drilling,
4. Anchor, 6. Waterproof and corrosion-resistant sheet. 8.Tsubabe. jl1 figure

Claims (1)

[Claims] Inserting a thermoplastic resin tension member into a hole formed in a concrete wall, and driving an anchor into the tension member to prevent the tension from falling out of the hole, and driving the anchor or inserting the tension member. A waterproof and corrosion-resistant sheet was laid on the concrete wall surface before and after
A method for installing a waterproof and corrosion-resistant sheet, in which a portion of the tension member protruding outward from the concrete wall surface is held by a flange formed by heat-melting.