JPS644960Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is suitable for driving fixing members such as nails to fix a waterproof sheet installed in a tunnel to the ground or lining concrete. Regarding the water stop structure to be adopted.

[Conventional technology]

Conventionally, in the tunnel lining section, as shown in Figure 4, a primary lining concrete b is cast on the ground a side, and a waterproof sheet c is attached to the primary lining concrete b with bolts, concrete nails, etc. It is fixed by nailing with a fixing member, and then a secondary lining concrete d is placed on this waterproof sheet c, and the waterproof sheet c is interposed between the primary and secondary lining concrete b and d. By draining the spring water by flowing down between the primary lining concrete b and the waterproof sheet c, spring water from the primary lining concrete b side is prevented from seeping into the secondary lining concrete d side. There is.

[Problem that the invention attempts to solve]

In this case, as shown in Fig. 5, when the waterproof sheet c is fixed to the primary lining concrete b by driving a fixing member e such as a nail, the fixing member There was a problem in which spring water from the ground side leaked from the back of the head to the secondary lining concrete side, and a solution was needed to solve this problem.

This invention was made to improve the above-mentioned situation, and even when a waterproof sheet is fixed by driving a fixing member into an installation location where there is a lot of spring water, such as a ground or primary lining concrete, the axis of the fixing member Even if water travels along the peripheral wall from the distal end side of the fixing member, the back surface of the head of the fixing member is constructed in a watertight state, so water will not leak outside from the back surface of the head of the fixing member. It is an object of the present invention to provide a water-stop structure that can reliably prevent water leakage in a driving part.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention aims to stop water when the shaft of a fixing member consisting of a head and a shaft is driven into a waterproof sheet and the waterproof sheet is fixed at a predetermined attachment point by the head of the fixing member. It is a structure,
A washer body is disposed on the waterproof sheet, and a heat-fusible material layer is formed on the washer body, and the shaft portion of the fixing member is covered with the heat-fusible material layer from above the heat-fusible material.
The fixing member is driven into the attachment location by passing through the washer body and the waterproof sheet in order until the back surface of the head of the fixing member is in close contact with the heat-fusible material layer, and the heat-fusible material layer is softened or melted by heating. The present invention provides a water-stopping structure characterized in that the back surface of the head of the fixing member is closely covered with the heat-fusible material layer by fluidizing the fixing member.

In this case, when the heat-fusible material layer is softened or melted by heating and fluidized, a new heat-fusible material is separately supplied to cover the head of the fixing member with the heat-fusible material. You can do it like this.

[Effect]

According to the waterproof structure of the present invention, since the back surface of the head of the fixing member is closely coated with a heat-adhesive substance to form a watertight structure, the waterproof sheet can be attached to the attachment point of the fixing member through the circumferential wall of the shaft of the fixing member. Even if water flows from the side to the head side of the fixing member, water leakage to the outside from the back surface of the head of the fixing member tightly covered with the heat-fusible material layer is reliably prevented.

In this case, a more reliable water-stopping effect can be achieved by separately supplying a new heat-fusible substance to the head of the fixing member and covering the entire head with the heat-fusible substance.

Further, in the water-stopping structure of the present invention, the shaft portion of the fixing member is driven from above the heat-fusible material layer, and the washer body is interposed between the heat-fusible material layer and the waterproof sheet. When positioning the tip of the fixing member when driving it in, the tip does not slip, so positioning is easy, and the work of driving the fixing member is easily performed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 and 2.

First Embodiment FIG. 1 shows an example of a waterproof sheet 1 used in the present invention, in which a lower adhesive layer 3 is formed on one surface of a main body 2 of an impermeable base sheet. A disk-shaped washer body 4 is disposed thereon, and an upper heat-fusible material layer 5 is further formed to cover this washer body 4.

Here, as the lower adhesive layer 3, rubberized asphalt, soft butyl rubber, a natural or synthetic rubber adhesive, or a sheet obtained by appropriately coating a rubber plate with any of these adhesives can be used.

Further, as the upper heat-fusible material layer 5, a layer of a heat-fusible material such as a hot melt adhesive whose main raw material is ethylene-vinyl acetate copolymer or the like can be used.

Next, an example of the waterproof structure of the present invention using the above-mentioned waterproof sheet 1 will be explained. As shown in FIG. 2, when fixing the waterproof sheet 1 to the primary lining concrete 6, From the material layer 5, the washer body 4, the lower adhesive layer 3, and the sheet main body 2 are sequentially penetrated, and the shaft part 7b of the fixing member 7, which consists of a head part 7a and a shaft part 7b of a concrete nail, bolt, etc., is attached to the head part 7.
The fixing member is poured into the primary lining concrete 6 until the back side of the fixing member is in close contact with the upper heat-fusible material layer 5, and the vicinity of the head of the fixing member is heated with a burner or the like, and the heat-fusible material is poured into the primary lining concrete 6. is softened or melted to be fluidized, and the back surface of the head 7a of the fixing member 7 is tightly coated with the heat-fusible material layer 5.

According to this water-stopping structure at the driving part of the fixing member 7, the lower adhesive layer 3 adheres to the peripheral wall 7c of the fixing member 7 due to the adhesive action of the adhesive, and therefore spring water from the primary lining concrete 6 side is the fixed member 7
Although spring water can be prevented from leaking through the peripheral wall 7c from the tip side of the fixing member 7 by forming a watertight structure in which the adhesive adheres to the peripheral wall of the fixing member 7,
Even if a slight gap is created between the peripheral wall 7c and the adhesive layer 3 and heat-fusible material layer 5 when the shaft portion 7b of is heated with a burner or the like to soften or melt the heat-fusible material and fluidize it, thereby closing the gap, and as a result, the back surface of the head 7a of the fixing member 7 comes into close contact with the heat-fusible material 5, thereby covering it. Since there is no gap that may cause water leakage, a good watertight structure is formed on the back surface of the head 7a, and a complete watertight effect is achieved.

Furthermore, in the water stop structure described above, the upper heat-fusible material layer 5 is formed to cover the washer 4, and the fixing member 7 is driven into the upper heat-fusible material layer 5. It is very easy to drive. In other words, when the fixing member is driven into the washer with the washer facing upward, when the tip of the fixing member is brought into contact with the washer to position it, the tip of the fixing member slides over the washer and is difficult to position. On the other hand, when the tip of the fixing member 7 is placed on the surface of the heat-fusible material layer 5, there is no slipping, so positioning is very easy. Since the fixing member 7 can be driven in as it is, the work of driving in the fixing member 7 is easily performed. Moreover, in the water stop structure described above, the washer body 4 is a mere disc-shaped and the fixing member 7 is configured to punch out this washer body 4. There is no need to worry about positioning the fixing member 7 according to the hole, and you can simply place the tip of the fixing member 7 at an appropriate position on the upper heat-fusible material layer 5 and drive it. In addition to being easy to install, a through hole 8 is formed when the fixing member 7 punches out the washer 4, and the diameter of this hole 8 is the same as the diameter of the driving shaft portion 7c of the fixing member 7. Therefore, since the movement of the washer body 4 is regulated by the driving shaft portion 7c of the fixing member 7, the fixed state of the waterproof sheet 1 by the fixing member 7 is maintained reliably.

Second Embodiment FIG. 3 shows another embodiment of the present invention, in which the lower adhesive layer is omitted.
This water stop structure also has the same effect as the embodiment shown in FIG. In this case, as shown by the dashed line,
After driving the fixing member 7, the head 7a of the fixing member 7
When softening or melting the heat-fusible material in the vicinity to make it fluid, the heat-fusible material layer 9 can be formed to cover the head 7a by separately supplying a new melted heat-fusible material. , it is possible to form a water-stopping structure in which the heat-fusible material is in close contact with the fixing member head 7a.

Further, in this case, an adhesive layer may be formed to cover the head 7a instead of a new heat-fusible substance, and this also makes it possible to further improve the water-stopping effect.

In the present invention, a ring-shaped washer having a through hole may be used as the washer, and other configurations may be modified in various ways without departing from the gist of the present invention.

[Effect of idea]

As explained above, when fixing a waterproof sheet by driving a fixing member into a predetermined installation location, the shaft of the fixing member is driven until the back of the head is in close contact with the heat-fusible material layer, and the By softening or melting the heat-adhesive material and closely covering the back surface of the head with the heat-adhesive material, a complete watertight structure is formed on the back surface of the head of the fixing member. This reliably prevents water from leaking from the head side of the fixing member to the outside. Further, according to the water stop structure of the present invention, when driving the fixing member, the tip of the shaft portion can be easily positioned, and the operation of driving the fixing member is simple.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an example of a waterproof sheet used in implementing the present invention, Fig. 2 is a cross-sectional view showing an example of the water-stopping structure of the present invention, and Fig. 3 is another embodiment of the water-stopping structure of the present invention. FIG. 4 is a cross-sectional side view of a tunnel lining portion in which a waterproof sheet is provided, and FIG. 5 is a cross-sectional view showing a state in which a conventional waterproof sheet is fixed to lining concrete. 1... Waterproof sheet, 3... Lower adhesive layer, 4...
... Washer body, 5 ... Heat-fusible material layer, 7 ... Primary lining concrete, 8 ... Fixing member, 8a ... Head, 8b ... Shaft part.

Claims (1)

[Claims for Utility Model Registration] 1. The shaft portion 7b of the fixing member 7 consisting of the head portion 7a and the shaft portion 7b is driven into the waterproof sheet 1, and the head portion 7a of the fixing member 7 is used to attach the waterproof sheet 1 to a predetermined attachment point. A waterproof structure when fixed to
While arranging the washer body 4 on the waterproof sheet 1,
A heat-fusible material layer 5 is formed on the washer 4, and the shaft portion 7b of the fixing member 7 is attached to the heat-fusible material layer 5, the washer 4, and the waterproof sheet from above the heat-fusible material 5. 1 of the fixing member 7 in sequence.
a The head of the fixing member 7 is driven into the attachment location until the back surface is in close contact with the heat-fusible material layer 5, and the heat-fusible material layer 5 is softened or melted by heating to make it fluid. A water-stopping structure characterized in that the back surface of 7a is closely covered with the heat-fusible material layer 5. 2. When the heat-fusible material layer 5 is softened or melted by heating and fluidized, a new heat-fusible material is separately supplied, and the head 7a of the fixing member 7 is covered with the heat-fusible material. A water-stopping structure according to claim 1 of the utility model registration claim.