JPH0569928B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention is used for civil engineering work to prevent leakage of river banks, pond renovation work such as retarding ponds and reservoirs, underground elevated construction work, etc., and the joints of adjacent impermeable pine are used as special joints to connect the entire structure. The present invention relates to a method of constructing a water-shielding pine that improves strength and water-shielding properties by integrating the water-shielding pine. [Prior Art] Water-shielding pine is commonly used as a water-shielding material in reservoirs, river banks, underground passages, factory effluents, waste treatment ponds, and the like. This conventionally used water-blocking mat uses a soft vinyl chloride resin sheet with the required strength as the water-impermeable layer, and one side of this sheet is integrally bonded with felt using a special adhesive.
This sand mat is used as a cushioning material. [Problem to be solved by the invention] A water-shielding pine that has a vinyl chloride sheet on one side and a sand pine as a cushioning material on the other side can be used to prevent the vinyl sheet surface from touching the ground when carrying out the various types of water leakage prevention work mentioned above. Concrete blocks, etc. are arranged on top of this water-blocking mat. For this reason, if the ground on which water leakage prevention work is to be carried out is uneven with rocks, pebbles, etc., the sheet may break during or after construction due to these protrusions, reducing the water leakage prevention effect. . Furthermore, water-shielding mats of the required width are stacked on top of each other with their edges stacked one on top of the other, and the overlapped areas are glued together to prevent water leakage in the overlapped areas.
During construction, if the adhesion is not perfect, water may leak from the incompletely bonded parts, and furthermore, if tensile forces are applied due to earthquakes or the like, there will be disadvantages such as displacement of the joints. The present invention uses a special thin stainless steel plate in place of the vinyl sheet attached to the sand mat, locks the edges of adjacent mats together, and integrates the joint to improve its strength and prevent water leakage. The aim is to also improve [Means for solving the problem] A thin stainless steel plate is pasted on one side of a sand mat, which has a cushioning effect and is made by intertwining and bonding synthetic resin fibers together to form a plate-like nonwoven fabric of a required thickness, to form a water-shielding mat as one piece. At the same time, one end of this stainless steel plate is made to protrude from the edge of the sand mat and is folded back toward the sand mat, and the other end is folded back at the edge of the sand mat toward the side opposite to the sand mat, and the folded portions of the stainless steel plates at the ends of the water-shielding mats that are adjacent to each other are formed. The water-shielding mats are connected and laid one after another, and concrete blocks or the like are placed on top of the mats. It is also possible to bond the folded joint portion of the stainless steel plate. [Function] At the end of the sand mat serving as a cushioning material, an adjacent water-shielding mat is laid so that the folded portions of the thin stainless steel plates stuck to the sand mat are locked and connected to each other. For this reason, it has excellent corrosion resistance and has a tensile strength compared to vinyl chloride sheets.
It is strengthened approximately 40 times per Kgf/cm ² and will not break even if hard protrusions such as stones are placed on the ground, improving the water leakage prevention effect. Furthermore, since the joint of the folded part at the end of the mat is integrated, it can withstand tensile force up to the shear stress of the stainless steel plate, increasing strength compared to adhesive methods, ensuring reliable construction, and improving accuracy and durability to prevent water leakage. improves. [Example] The construction method of the water-blocking pine according to the present invention will be explained below based on the illustrated example. In the figure, numeral 1 denotes a sand mat that serves as a cushioning material for the water-shielding mat of the present invention, and is manufactured in the same manner as in the conventional method. For example, synthetic resin fibers are roughly intertwined with each other and integrated with a bridge material to form a plate-like nonwoven fabric of a desired thickness. In this case, since the tensile strength of the stainless steel plate used as a water-shielding material is increased, its thickness can be made thinner than conventional products. 2 is a special standard stainless steel thin plate used as a water-shielding material, and is usually about 0.1 mm to 0.4 mm thick. For example, the elemental composition of common stainless steel is as follows.

[Table] On the other hand, the elemental composition used in the present invention is as shown below, in which nitrogen and molybdenum are added to the elements of general steel materials, and the element ratios are also different. , chemical resistance, and weather resistance are improved.

〔Effect of the invention〕

According to the present invention, a thin stainless steel plate is attached to one side of a sand mat having a cushioning effect, which is made by intertwining and bonding synthetic resin fibers to form a plate-like nonwoven fabric of a required thickness, thereby forming an integral water-shielding mat. One end of this stainless steel plate is made to protrude from the edge of the sand mat and folded back toward the sand mat, and the other end is folded back at the edge of the sand mat toward the side opposite to the sand mat, and the folded parts of the stainless steel plates at the ends of the water-shielding mats that are adjacent to each other are locked together. let me,
Since the water-shielding pine is laid one after another, and concrete blocks etc. are placed on top of these mats, the joint between adjacent water-shielding pine can be made firmly and reliably, completely preventing water leakage. can be prevented. In addition, the joints do not come apart even during earthquakes, etc., so it has a stable effect over a long period of time, and has the advantages of easy construction and improved accuracy.

[Brief explanation of the drawing]

FIGS. 1 and 2 are external views, and FIG. 3 is an explanatory cross-sectional view showing the construction order. 1 is a sand mat, 2 is a stainless steel plate, 21,
22 is an attachment piece.

Claims (1)

[Scope of Claims] 1 A water-shielding mat is formed by pasting a thin stainless steel plate on one side of a sand mat having a cushioning effect, which is made by entangling and bonding synthetic resin fibers together to form a plate-like nonwoven fabric of a required thickness. At the same time, one end of this stainless steel plate is made to protrude from the edge of the sand mat and is folded back toward the sand mat, and the other end is folded back toward the side opposite to the sand mat at the edge of the sand mat.
The folded portions of the stainless steel plates at the ends of adjacent water-shielding mats are locked to each other, the water-shielding mats are sequentially laid while being joined, and a concrete block or the like is placed on top of the mats. How to install waterproof pine. 2. The method of constructing a water-shielding pine according to claim 2, wherein the folded stainless steel plate portions of the water-shielding pine are fixedly joined together by applying an adhesive to each other.