JPH0437997Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial application field This invention is used for concrete lining in construction work,
For example, prior to concrete lining in the construction of tunnels, shafts, dams, underground structures, etc., a water-stop sheet is placed on the concrete lining, especially on one side to create a space for spring water drainage behind the concrete lining. This invention relates to a type of plastic water stop sheet that has ridges and ridges scattered about.

In this specification, including the statement in the claims section of the utility model registration, in relation to the present invention, the term "plastic" refers to various materials that have the property of forming desired protrusions and protrusions under embossing with an embossing roll. It is used in a broad sense, encompassing.

Conventional technology and its problems Conventionally, the above-mentioned type of water-stop sheet that is applied to the surface of the concrete lining prior to concrete lining in construction work is known to have ridges and protrusions scattered on one side. However, such conventional waterstop sheets have the following problems.

The ridges and protrusions in this type of water stop sheet are formed on the material sheet by embossing with an embossing roll for industrial reasons, and the thickness of this type of water stop sheet tends to be thinner in order to reduce the cost. However, if the material sheet is made thinner, the formability of the ridges and convexes with the embossing roll becomes worse.
It is not possible to properly form the protrusions into a material sheet with the protrusion and diameter suitable for creating a space for spring water drainage on the back side of the concrete lining.

Therefore, the present invention guarantees that ridges and ridges of the required protrusion and diameter can be formed well under processing using an embossing roll on thin material sheets, which was previously impossible. The aim is to provide a water-stop sheet.

Means for Solving the Problems The purpose of the present invention is to provide a plastic water-stop sheet having scattered protrusions on one side in order to create a space for draining spring water on the back side of a concrete lining for construction work. Then, protrusions are formed on one side in a lattice shape in which lines connecting horizontally arranged lattice points are inclined with respect to the horizontal axis of the water stop sheet, and required protrusions and protrusions are formed at locations corresponding to the intersections of the protrusions. This is achieved by a water-stop sheet that is formed with a protrusion greater than 1.

The reason why the water stop sheet is made of plastic in the present invention is that the necessary protrusions and protrusions are formed by embossing with an embossing roll.

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.

By embossing with an embossing roll, the lines that line up the lattice points arranged horizontally on one side of the plastic material sheet are inclined with respect to the horizontal axis of the water stop sheet 1 (left-right direction in Figure 1) (same as the horizontal axis of the material sheet). lattice-shaped protrusions 11 forming a lattice point pattern;
A space B for spring water drainage is located on the back of the concrete lining A of the construction work, located at a point corresponding to the intersection of the protrusions 11.
The ridges 12 are formed to make the ridges and ridges exist. The degree of protrusion of the protrusions and protrusions 12 is greater than the degree of protrusion of the protrusion 11. The horizontal axis of the water stop sheet 1 faces the vertical axis of the embossing roll.

In the illustrated embodiment, the lattice of the protrusions 11 is a diagonal lattice with the above-mentioned lattice point pattern, and the protrusions 12 are arranged in a staggered manner.
As long as the lattice is a lattice in which the lines connecting horizontally arranged lattice points are inclined with respect to the horizontal axis of the water stop sheet, other types of lattice, for example, the vertical lattice lines are parallel to the vertical axis of the water stop sheet, and the horizontal lattice lines are may be a lattice that is a line connecting lattice points arranged in the horizontal direction, and the protrusions 12 may be located at the lattice points of the protrusions 11 in the lattice.

In the figure, reference numerals 13 indicate connection parts at both left and right ends of the waterstop sheet 1, and the parts 13 are zones without protrusions 11 and protrusions 12.

The water stop sheet 1 is applied to the concrete covering surface C in the same manner as before, and the adjacent water stop sheets 1 and 1
The mutually overlapping connecting portions 13 are welded in a conventional manner. As a result of applying the concrete lining A from above the water stop sheet 1, a space B for spring water drainage exists on the back side of the concrete lining A. In the space B, the degree of protrusion of the protrusions and protrusions 12 is 1.
Since the protrusion is greater than 1, concrete lining A
It communicates over substantially the entire back surface.

Effects of the invention The water stop sheet according to the invention has a structure in which lattice-like protrusions are formed on one side and protrusions are formed at locations corresponding to the intersections of the protrusions. When the ridges and ridges are embossed, ridges and ridges are formed at the relevant locations by increasing the substantial thickness of the plastic material sheet due to the convergent intersection of the vertical and horizontal lattice lines of the ridges, Therefore, we used a thin plastic sheet material and processed it with an embossing roll.
Protrusions and protrusions can be formed with a desired degree of protrusion and diameter.

Furthermore, in the present invention, the lattice of the protrusions is in a lattice-like form in which the lines connecting the lattice points arranged in the horizontal direction are inclined with respect to the horizontal axis of the waterstop sheet. When forming protrusions and protrusions, lattice-shaped grooves corresponding to the lattice of the protrusions on the circumferential surface of the embossing roll serve as air escape passages during the progress of embossing. The fact that the protrusions are located at the points corresponding to the intersections of the lattice-like protrusions means that the line connecting the protrusions lined up horizontally is also inclined with respect to the horizontal axis of the water stop sheet. Compared to the case where the embossing rolls are arranged in parallel, the rotation of the embossing roll makes it much less likely that air will be trapped in the depressions on the circumferential surface of the embossing roll corresponding to the protrusions. As a result of these, the moldability of the protrusions on the thin plastic material sheet using an embossing roll is improved.

Thus, according to the present invention, it is possible to form protrusions and protrusions of the desired protrusion degree and diameter in a thin material sheet, which was previously impossible, under processing with an embossing roll, and to create a type with protrusions and protrusions. It is possible to provide a water stop sheet that becomes thinner.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
The figure is a partially enlarged view of Figure 1, and Figure 3 is a partial enlargement of Figure 2.
FIG. 1...Waterstop sheet, 11...Protrusion, 12...Rump, A...Concrete lining, B...Space for spring water drainage, C...Concrete covered construction surface.

Claims (1)

[Scope of utility model registration request] It is a plastic water stop sheet that has scattered ridges on one side to create a space for spring water drainage on the back of the concrete lining of construction work, and the lines connecting the horizontal grid points are the water stop sheets. A water-stop sheet, in which protrusions are formed on one side in a lattice shape inclined with respect to a horizontal axis, and required protrusions and protrusions are formed at locations corresponding to the intersections of the protrusions with a degree of protrusion greater than that of the protrusions.