JPH01229191A - Water leakage preventing coupling for culvert and water stop method - Google Patents

Abstract

PURPOSE:To freely cope with any severe status such as sinkage, curve and long-distance construction or the like and to surely prevent water leakage by covering the end portion of a culvert with a cap-like elastic body. CONSTITUTION:A cap-like elastic body A has a section 1-shaped so that one side thereof contacts the outer periphery of the end portion of a culvert B, the other side thereof contacts the connection side end surface, and a projecting portion 1 is provided a little to the inner periphery of the above end surface in such a manner as to project on the connection side. On the other hand, a T-shaped projecting portion 2 is provided on the end portion of the cap-like elastic body A contacting the outer peripheral surface of the endportion of the culvert B, and a portion 2a thereof projecting inward is built in the end portion of the culvert B and fixed there. Projecting portions 1, 1' confronting each other by connection are joined to each other by adhesives 3, 3' without conducting bolting, welding work using a heating iron which requires hands in the culvert.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a joint used for connecting an underdrain, such as a sewer system, and a municipal water method.

(Conventional technology) Up until now, joints and methods for preventing water leakage in underdrain connections have included filling mortar or sealing material into the gap between underdrain joints, or providing a groove around the edge of the underdrain and fitting a rubber ring into this groove. , the rubber ring was crimped.

l 1) For example, there are crimping methods such as crimping the inner walls of opposing underdrains, crimping cylindrical steel joints called steel collars, and installing multiple rubber rings to further improve water-stopping properties. There was also a model I2 called the embedded collar type, in which a steel collar was integrally molded around the outer periphery of one end of the culvert.

More recently, there are systems in which elastic bodies are interposed at the joints of underdrains and fixed with bolts, or joints made of elastic bodies are welded together to connect them.

As more and more severe construction conditions are required, conventional technology is no longer able to adequately deal with water leaks.For example, if mortar or sealing material is filled, it may become detached or missing due to subsidence or meandering of the culvert, resulting in water leakage. Happened often. or,
In the case of rubber ring crimping, when inserting one side of the culvert or a steel collar, the comb ring often comes off or breaks, and if the steel collar is corroded, the water-stopping function of the rubber ring crimping is completely lost. I lost it.

(2) Furthermore, in Japanese Patent Publication No. 62-24585, a steel collar is divided into two parts, an elastic body is interposed between them, and the elastic body is fixed to the steel collar-anchoring member on both sides with Pole 1 to open a culvert. The joint to be connected is also described in Japanese Patent Publication No. 62-56297 as a joint in which an elastic body is interposed and fixed with a retaining plate and bolts. As can be seen in the example of corrosion, it is attacked by various harmful substances generated in the culvert and the soil, and eventually rusts and corrodes.
This means that manual work inside the culvert is required. It is not only a time-consuming scale, but also a problem in terms of human life safety. Moreover, these joints are of course completely incapable of dealing with the case of a small diameter 11 where no one can enter. Japanese Patent Application Publication No. 58-123941 describes a method of welding together elastic joint materials protruding from the joint surfaces using a heating iron, but the method is similar in that it cannot accommodate small diameters.

The present invention eliminates the above-mentioned drawbacks and, from an economic point of view, does not change the shape of the conventional culvert as much as possible.
The purpose of the present invention is to provide a joint and a water stoppage method that can reliably prevent water leakage while taking advantage of the characteristics of an elastic body, and can also be applied to small diameters that do not require manual intervention.

(Means for Solving the Problems) The configuration of the present invention will be explained in the case of an underdrain using a steel collar as follows.

FIG. 1(a) is a perspective view showing a state in which a tube-like elastic body A made of rubber, resin, etc. is attached to the end of an underdrain B.
b) is its front view, and (C) is in contact with the surface thereof, and there is a protrusion 1 near the inner periphery of the end surface, protruding toward the connection side. An adhesive or adhesive 3 is applied to the connecting surface of the protrusion 1. On the other hand, there is also a T-shaped protrusion 2 at the end of the cap-shaped elastic body A that is in contact with the outer circumferential surface of the end of the culvert B, and the inwardly protruding portion 221 is internally fixed to the end of the culvert B. There is. The outwardly protruding portion 2b serves as a water stopper by crimping, and the crimping surface is corrugated. In addition, between the connecting sides of the cap-shaped elastic body A [1 part C is the underdrain B
The cross section is the same as the inner diameter cross section of.

FIG. 2 shows a cap-shaped elastic body A having the following configuration,
It is a sectional view when underdrain B-B' crowned by A' is connected via a cylindrical steel collar D having a T-shaped cross section.

The protrusions 1 and 1' which are butted together by the connection are joined together by an adhesive or a pressure-sensitive adhesive 33' in the underdrain without the need for labor-intensive bolt tightening or welding with a heating iron. In addition, since the protrusions 2a and 2a' are internally fixed, even if the connecting surfaces B and B', which separate from the collar like a conventional rubber ring by inserting the steel collar D, open in a V-shape, the cap will remain intact. The ends of the elastic bodies A and A' can also be opened in a V-shape, and! Even if there is a gap between the JA collar 〇 and the protrusions 2b and 2b' and water leaks, the connection between the protrusions 1° and 1' prevents the water from leaking into the underdrain. parable,
Even if the steel collar 〇 corrodes, the protrusion 1.1'
Due to the combination of the two and the built-in fixation of the protrusions 2a and 2a', water does not leak into the underdrain. In addition, even if the end faces of the underdrain partially press against each other due to subsidence or meandering, the elastic body serves to relieve the force applied to the end face of the underdrain. Particularly in the case of propulsion pipes, one of the important points is to evenly distribute the thrust applied to the end face and to protect the end face, and cushioning materials such as plywood boards are attached to the end face of the underdrain. The above-mentioned cap-shaped elastic body A' is attached to the cushion underdrain B' end of the bodies A and A', and a cap-shaped elastic body A and a steel collar D are attached to the underdrain B end. Since it is integrally molded, the protrusion 2b shown in FIG. 1.2.3 is not required. Also, since the steel collar [) is not a cylinder with a T-shaped cross section but a simple cylinder, the protrusion 1 shown in Fig. 1.2.3
4.4 A joint with a shape that fits or fits in place of the
′ and connect the elastic body.

In addition, when using a conventional underdrain economically without modifying the formwork, for example, in a culvert with two comb rings as shown in Figure 5, it is necessary to use the conventional rubber ring thread 5.5'. protrusion 2a,
2a' is fixed with an adhesive or the like, or an elastic protrusion 6.6' is newly provided to tightly fit into the notch for filling mortar on the inner periphery of the end face.

FIG. 6 shows examples of underdrains B and H' having different end shapes. There is no change in the structure in which the underdrain f\ is fixed by the protruding parts 2a, 2a' of the cap-like elastic bodies A, A', and the elastic bodies are connected to each other by the connecting parts 4.4'.

In this manner, the shape of the protrusion 1.2 shown in Fig. 1.2.3 can be changed as appropriate depending on the type of underdrain.

Further, the elastic body may be joined by a method of thermal welding of an adhesive or adhesive material.

(Effects of the Invention) As described above, according to the present invention, a cap-shaped elastic body is fixed to an underdrain on one side, and is connected to similar elastic bodies facing each other on the other side without requiring any manpower. Therefore, any subsidence or curve
Not only can it respond flexibly to harsh conditions such as long-distance construction and reliably prevent water leakage, but it can also be used to protect human lives from danger when constructing dangerous culverts, no matter how excellent the invention is in terms of water-stopping and economic efficiency. It is meaningless if the length is missing, and the present invention is a joint and a water stop method that takes safety into consideration.

In addition, as the use of sewerage systems progresses, the construction of small-diameter culverts will increase from large-diameter ones for main lines to small-diameter ones for branch lines. The present invention has the advantage of being able to deal with such problems.

[Brief explanation of the drawing]

FIG. 1 is a perspective view (a), a front view (b), and a partial sectional view (c) of a state in which a cap-shaped elastic body is attached to the end of an underdrain. Figure 2 shows a partial cross section when connecting the culvert [S1, No. 31]
: ¥1 is a partial cross-sectional view of the sinking ring, Figure 4 is a partial cross-sectional view of a buried collar type underdrain connection, Figure 5 is a partial cross-sectional view of a gono and two ring type underdrain connection. FIG. 3 is a partial cross-sectional view of an underdrain connection having a different part shape. (A) is the cap-shaped elastic body (B) is the underdrain (C) is the opening (D> is the #4 collar (1) is the protrusion for connecting the elastic body <2) is the (a) protrusion for fixing the elastic body , Elastic material crimping <b) The protruding part (3) is an adhesive, etc. (4) is different. The joining part (5) is for a rubber ring. The part (6) is a notched part protrusion.

Claims (1)

[Claims] 1. A water leakage prevention joint characterized in that the end of the underdrain is covered with a cap-like elastic body. 2. A water stoppage method characterized by connecting the elastic joints according to claim 1 to prevent water leakage.