JPS6319438Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a water-stop structure that is suitable for use when driving fixing members such as nails in order to fix a waterproof sheet installed in a tunnel to the ground or concrete lining. Regarding.

Conventionally, in the tunnel lining section, as shown in Figure 1, 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 to prevent water leakage. By draining water by flowing down between the primary lining concrete b and waterproof sheet c, spring water from the primary lining concrete b side is prevented from seeping into the secondary lining concrete d side. .

In this case, as shown in Fig. 2, 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.

That is, in order to achieve the above object, the present invention provides a method for fixing the waterproof sheet at a predetermined attachment point by driving the shaft of a fixing member consisting of a head and a shaft into a waterproof sheet and using the head of the fixing member. It has a waterproof structure, with a washer body placed on the waterproof sheet,
An adhesive layer is formed on the washer, and the shaft portion of the fixing member is passed through the adhesive layer, the washer, and the waterproof sheet in order from above the adhesive layer, so that the back surface of the head of the fixing member is coated with the adhesive. The present invention provides a water-stopping structure characterized in that the adhesive layer is driven into the attachment point until it comes into close contact with the adhesive layer, so that the back surface of the head of the fixing member is tightly covered with the adhesive layer.

According to the water-stop structure of the present invention, the back surface of the head of the fixing member is in close contact with the adhesive layer and is covered with this, forming a water-tight structure, and the waterproof sheet passes along the peripheral wall of the shaft of the fixing member. Even if water flows from the attachment point 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 adhesive layer is reliably prevented.

In addition, in the water-stopping structure of the present invention, the shaft portion of the fixing member is driven in from above the adhesive layer, and the washer is interposed between the adhesive layer and the waterproof sheet, so when driving in the fixing member, When positioning the tip, since the tip does not slip, it is easy to position, and the operation of driving the fixing member is easily performed.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 and 4.

FIG. 3 shows an example of a waterproof sheet 1 used in the present invention. This waterproof sheet 1 has a lower adhesive layer 3 formed on one surface of a main body 2 of a water-impermeable base sheet, and a lower adhesive layer 3 on one side of the main body 2. A disk-shaped washer 4 is disposed on the holder 4, and an upper adhesive layer 5 is formed to cover the washer 4. Note that 6 is a release layer.

Here, as the adhesive layers 3 and 5, rubberized asphalt, soft butyl rubber, natural or synthetic rubber adhesives, or sheets obtained by appropriately applying these adhesives to a rubber plate can be used.

Next, an example of the waterproof structure of the present invention using the waterproof sheet 1 described above will be explained. As shown in FIG. 4, when fixing the waterproof sheet 1 to the primary lining concrete 7, the peeling layer 6 is Then, a shaft portion 8c of a fixing member 8 consisting of a head 8b and a shaft portion 8c of a concrete nail, bolt, etc. is passed through the washer body 4, the lower adhesive layer 3, and the sheet main body 2 in order from the upper adhesive layer 5. is poured into the primary lining concrete 7 until the back surface of the head 8b is in close contact with the upper adhesive layer 5.

According to this water-stop structure at the driving part of the fixing member 8, the lower and upper adhesive layers 3 and 5 are in close contact with the peripheral wall 8a of the fixing member 8 due to the adhesive action of the adhesive, and the head of the fixing member 8 is The upper adhesive layer 5 is tightly coated on the back surface of 8b to form a watertight structure. Therefore, even if spring water from the primary lining concrete 7 side travels through the peripheral wall 8a from the tip side of the fixing member 8, the adhesives 3 and 5 adhere to the peripheral wall of the fixing member 8, forming a watertight structure. This prevents leakage from the head 8b side of the fixing member 8, and even if the shaft portion 8c of the fixing member 8 is driven in, the peripheral wall 8
Even if there is a slight gap between a and the adhesive layers 3 and 5 and spring water permeates through this gap, the back surface of the head 8b of the fixing member 8 will be tightly covered with the adhesive layer 5, Since there are no gaps where water can leak, a complete water-stopping effect is achieved. That is, in the water-stopping structure shown in FIG. 4, the adhesive layers 3 and 5 are formed above and below the washer body 4, respectively, so that the water-tightness is more reliable.
Further, as shown in FIG. 4, the head 8b of the fixing member 8
Fixing member 8 until the back side is in close contact with upper adhesive layer 5
By driving in, a good watertight structure is formed also on the back surface of the head 8b, and the watertightness is extremely high.

Further, in the water stop structure described above, an upper adhesive layer 5 is formed covering the washer body 4, and this upper adhesive layer 5
Since the fixing member 8 is driven in, the fixing member 8 can be driven in very easily. 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 8 is placed on the surface of the adhesive layer 5, it does not slip and positioning is very easy.
All you have to do is hit it and type in as is.
The work of driving the fixing member 8 is easily performed. Moreover, in the water stop structure described above, the washer body 4 is a mere disc-shaped and the fixing member 8 is configured to punch out this washer body 4. There is no need to worry about positioning the fixing member 8 according to the hole, and the tip of the fixing member 8 can be simply placed on an appropriate position on the upper adhesive layer 5 and driven. From this point of view, the work of placing the fixing member 8 is also simplified. It is easy to make, and when the fixing member 8 punches out the washer body 4, a through hole 9 is formed, and the diameter of this hole 9 is the same as the diameter of the driving shaft portion 8c of the fixing member 8. Therefore, since the movement of the washer body 4 is regulated by the driving shaft portion 8c of the fixing member 8, the waterproof sheet 1 can be secured by the fixing member 8 reliably.
remains fixed.

FIG. 5 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 the fixing member 8 is driven in, an adhesive layer 10 can be formed to cover the head 8b of the fixing member 8, thereby making it possible to further improve the water-stopping effect. Further, after the fixing member is cast, a heat-fusible substance can be supplied near the head of the fixing member that protrudes from the upper adhesive layer.

Furthermore, in the above embodiment, the fixing member was driven in after removing the release layer 6, but in some cases, the fixing member could be driven in without removing the release layer 6, and a ring-shaped washer with a through hole could be used as the washer. Various changes may be made to other configurations without departing from the gist of the present invention.

As explained above, when fixing a waterproof sheet by driving a fixing member into a predetermined installation location, the fixing member can be fixed by driving the shaft of the fixing member until the back surface of the head is tightly covered with the adhesive layer. A completely watertight structure is formed on the back surface of the head of the fixing member, and therefore, water is reliably prevented from leaking from the head side of the fixing member to the outside through the peripheral wall of the fixing member. 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]

Figure 1 is a cross-sectional side view of a tunnel lining section where a waterproof sheet is installed, Figure 2 is a cross-sectional view showing a conventional waterproof sheet fixed to lining concrete, and Figure 3
The figure is a cross-sectional view showing an example of a waterproof sheet used in implementing the present invention, Figure 4 is a cross-sectional view showing one embodiment of the water-stopping structure of the present invention, and Figure 5 is a cross-sectional view showing another embodiment of the water-stopping structure of the present invention. FIG. 1... Waterproof sheet, 3... Lower adhesive layer, 4...
... washer body, 5 ... upper adhesive layer, 7 ... primary lining concrete, 8 ... fixing member, 8a ... peripheral wall,
8b...Head, 8c...Shaft.

Claims (1)

[Scope of utility model registration request] The shaft portion 8c of the fixing member 8 consisting of a head portion 8b and a shaft portion 8c is driven into the waterproof sheet 1.
This is a waterproof structure for fixing the waterproof sheet 1 at a predetermined attachment point by the head 8b of the waterproof sheet 1, and a washer 4 is arranged on the waterproof sheet 1,
An adhesive layer 5 is formed on the top of the fixing member 8, and the shaft portion 8c of the fixing member 8 is passed through the adhesive layer 5, the washer 4, and the waterproof sheet 1 in order from above the adhesive layer 5 to form the head of the fixing member 8. A water-stop structure characterized in that the back surface of the head 8b of the fixing member 8 is tightly covered with the adhesive layer 5 by driving it into the attachment location until the back surface of the part 8b comes into close contact with the adhesive layer 5.