JPS59140993A - Cut-off execution method of waterproofing zone for cut-off and buried pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof belt capable of forming a dense waterproof layer by absorbing water, and a construction method using the waterproof belt to waterproof joints or leakage parts of buried pipes. It is something.

Conventionally, various methods have been used to prevent water leakage at the joints of underground pipes for water or sewage, such as covering the joints with non-shrink mortar, 6411W mortar, packing, or amorphous seals. h'<, it is extremely difficult to perform reliable construction because of wet and wet areas and poor underground work environment.

It is extremely difficult to maintain water tightness over a long period of time due to ground subsidence after rough processing, pressure from running vehicles, vibrations, etc.
It was seen as a force majeure to some extent. Due to the above situation, a large amount of rainwater or groundwater flows into the pipe, or sewage leaks from the pipe. Therefore, in the case of inflow, the flow rate greatly exceeds the design value, causing a great deal of unreasonableness in relation to the processing capacity, and in the case of outflow, it not only causes hygiene and environmental pollution problems, but also There is a risk of causing direct harm or disaster, such as road collapse due to the washing away of earth and sand from beneath the road surface.

However, the present invention has obtained a waterproof belt that absorbs water and forms a waterproof layer, and by wrapping it around a joint or a leaking part of a pipe, a waterproof layer is automatically formed. In addition, it can withstand ground subsidence, pressure from vehicles, and vibrations without losing its flexibility, exhibits a good waterproofing effect, and prevents water from flowing into or out of the pipe, thus solving the problems of the conventional methods. Next, the present invention will be explained with reference to an embodiment. Two strip-shaped nonwoven fabrics 1.1a made of synthetic resin fibers are overlapped and spaced at a predetermined interval (for example, 10 mm to 25 mm) in the longitudinal direction.
The parallel tubular portions 2, 2 are formed by sewing them together at intervals of 1f1m. The waterproof belt 5 of the present invention is completed by uniformly filling the dry hemp puy 1 with the powder 3 into the tubular portions 2.2, and sewing the ends 4, 4a to close the opening.

In the figure, numerals 6 and 6a are strings for fastening attached to the edge of the waterproof belt. In the above embodiments, a non-woven fabric made of synthetic resin fibers was used as the water-permeable thin layer flexible material, but it is of course possible to use a woven fabric made from natural fibers or a mixture of synthetic resin fibers and natural fibers, or paper such as Japanese paper. , a synthetic resin sheet having a large number of small holes can also be used. However, it is preferable that the seams between the two materials (or bonded by heat welding or adhesive) be made relatively easy to separate so that a continuous waterproof layer is formed when the superabsorbent gel absorbs water and swells.

For example, it is possible to obtain a waterproof belt of better quality by using sewing thread that is weak against water, by adhering with a water-soluble adhesive, or by using relatively weak heat welding. can.

In the above example, dry Ben 1 Henite powder was used (-), but the point is that any harmless substance that absorbs water and swells to form a waterproof layer can be used. Various types of clay particles, polyacrylates, polyvinyl alcohol-based superabsorbent glupolymer, and acrylonitrile-based hydrophilic cross-linked vehicle combinations, singly or in mixtures, or the above-mentioned inorganic and organic materials. It is also possible to use them in combination.Since the inorganic substances have a relatively high specific gravity and the organic substances have a relatively low specific gravity, by using them in combination, the weight of the waterproof belt can be adjusted, and the swelling ratio of the inorganic substances can be about 3 to 5 times as large. However, since organic materials have a relatively large swelling ratio (for example, 10 to 50 times), the thickness of the waterproof layer can be controlled by mixing organic and inorganic materials. Explain the water construction method.

Immediately before fitting the tubes 7 and 7a in sequence and fixing each tube,
One end of the waterproof band 5 is inserted under the tube joint 8, and then the tube is placed in a fixed position, and then the waterproof band 5 is wrapped around the outside of the tube and fastened with strings 6, 6a. In this case, it is preferable that the outer wall of the pipe body and the inner surface of the waterproof band 5 be bonded together as much as possible.

It is also important that the waterproof belt 5 is wrapped around both sides of the outer edge 8a of the tube joint 8 over a predetermined width (for example, 10 cm or more). The above width is sufficient as long as the waterproof layer does not come off due to movement of the pipe body due to external pressure or other reasons, but experience shows that the pipe body joint due to normal degree of ground subsidence, vibration, pressurization of vehicles, etc. 10 if you take into account the deviation of the parts.
On or more is required, but if the width becomes significantly wider, not only will the cost of materials rise, but also the workability will deteriorate, so in practice it can be considered to be 20 cm to 401 m/liI. Of course, the width also varies depending on the diameter of the tube. After treating the joint of the tube as described above, earth and sand 9 is poured in to embed the tube. After doing this, when water is absorbed by the highly water-absorbent gelled material (for example, pen 1 to dyed powder) of the waterproof belt 5, the gelled material swells to a predetermined thickness as shown in FIG. A waterproof layer 10 is formed which, together with earth pressure, adheres closely to the outer wall of the pipe body. In this case, the waterproof layer is made of non-woven fabric, etc., and its external shape is regulated, and the volume increases due to swelling due to water absorption of the gelled material (for example, 3 times or more), and the waterproof layer has an expansion pressure on the pipe body side and the earth and sand side. This will further strengthen the adhesion to the outer wall of the pipe.According to the above construction method, the waterproof belt is simply wrapped around a predetermined position, and then it is automatically tightened. Since it is possible to form a waterproof layer, the purpose of waterproofing can be achieved relatively easily and with a single action, regardless of the skill or skill of the construction technique.

Incidentally, even if woven or non-woven fabrics or fabrics lose their binding force due to decomposition and aging, the waterproof layer will remain in place for a long time and can still serve the purpose of waterproofing.

In the above embodiment of the waterproof belt, the end of the waterproof belt is tied to the string, but the string is a means to maintain the attached state.
The same effect can be expected even if the roll is kept in the folded state or by using a hook (for example, a hook with a metal strip). .

That is, according to the present invention, since the highly water-absorbent gelled material is interposed between two thin, water-permeable and flexible band-like materials, it is easy to handle and can be arbitrarily and easily attached to a predetermined part of the pipe body. There are benefits to be gained.

Further, according to the construction method of the present invention, since it is only necessary to wrap a waterproof belt, the construction is simple and easy, and does not require special techniques.
This has the effect of reliably forming a waterproof layer with a predetermined thickness. In addition, since the waterproof layer is formed by water absorption and swelling, the waterproof layer is pressed against the pipe wall during formation, resulting in good adhesion, and the waterproof layer is flexible, causing slight deformation or vibration at the pipe joint. There is no risk of destroying the waterproof layer even if it is sagged due to water leakage, and the waterproofing purpose can be achieved for a long time.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the invention, FIG. 2 is a partially enlarged perspective view, FIG. 3 is a partially perspective view during construction, FIG. 4 is an enlarged sectional view, and FIG. The figure also shows a partially longitudinal front view when the waterproof layer is completed, and Figure 6 also shows a longitudinal side view. 1.1a...Band-shaped untied rr 2.2...Tubular part 3...Ben I night powder 5...Waterproof band 7
, 7a... Pipe body 8... Pipe body joint Patent applicant Chuo Keno A Kogyo Co., Ltd. Agent Tadashi Suzuki Figure 1 Figure 3

Claims (1)

[Scope of Claims] 1. A water-stopping waterproof belt formed into a band shape by interposing a dried super-absorbent gel between laminated water-permeable thin-layer flexible materials; 2. Water-permeable thin-layer flexible material; The water-stopping waterproof belt 3 according to claim 1, wherein the flexible material is a woven fabric or a non-woven fabric made of synthetic fibers or natural fibers alone or in combination, and the water-permeable thin layer flexible material has a large number of small holes. The water-stopping waterproof belt 4 according to claim 1, which is a synthetic resin sheet having the above properties, and the highly water-absorbing gel material is an organic polymer or/and an inorganic super-absorbent powder granule, as described in claim 1. Water-stopping waterproof belt 5 according to claim 4, wherein the organic polymer is a polyacrylate, a polyhinyl alcohol-based superabsorbent polymer, or an acrylonitrile-based hydrophilic crosslinked polymer. 6. The highly water-absorbing granular material is ben]henite or other clayey dry powder or granular material, and the water-stop waterproof belt 7 according to claim 4 is used for joining underground pipes. The waterproof band according to claim 1 is wrapped around the joint or water leakage point, and the super absorbent gel interposed in the waterproof band swells and gels due to water permeation contact. Waterproof construction method for buried pipes 8, which is characterized by forming a waterproof layer around the buried pipe, and wrapping the waterproof belt is wider than the joint width of the buried pipe, and has sufficient overlap at the ends. Patent No. 8^ Claimed Scope Paragraph 7 Method for waterproofing underground pipes