JPS5817910A - Manufacture of large-sized flexible membrane weir - Google Patents

Abstract

PURPOSE:To facilitate the carrying-in to and execution at sites of the large- sized flexible membrane weir by mutually bonding a plurality of flexible membrane weir sections divided and formed extending over the longitudinal direction of the flexible membrane weir integrally at sites. CONSTITUTION:Rubber sheets 2 and reinforcing materials 18 are produced at factories, folded back properly and carried up to the site to be executed. The joining end edges of the rubber sheets 2 are mutually butted, adhesives are applied, the reinforcing materials 18 are pressed, and each rubber sheet 2 is mutually unified. Nose projections 3 in several joining section of the rubber sheets 2 are clamped and connected by means of reinforcing metal fittings 5 consisting of push pieces 6, 7. A hold-down fitting 22 is placed on the end section at the upper stream side of the ruber weir 1 produced in this manner, and the rubber weir 1 is fixed by means of anchor bolts studded to riverbed concrete 19. The rubber weir 1 can easily be carried into the site by dividing and shaping it.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a large flexible membrane weir, commonly referred to as a rubber weir.

Rubber weirs, which expand and contract when air, water, and other fluids are injected and discharged, are easy to construct and inexpensive, making them ideal for agricultural water intake,
It has come to be widely used for seawater dams at river mouths.

Moreover, as the benefits of rubber weirs have become better understood, large rubber weirs with longer lengths and higher weir heights have come to be required. In terms of manufacturing technology, it was limited to rubber weirs of a certain size.

Additionally, as the size of the rubber weir increases, the thickness of the rubber weir also increases, and the weight of the rubber weir increases rapidly in approximately proportion to the cube of the rate of increase in the size of the rubber weir, which makes road conditions relatively difficult. Poor enforcement made it difficult to transport by truck to the site. .

This invention relates to an improvement in the manufacturing method of a large-sized flexible membrane weir that overcomes these difficulties. The feature is that at least two flexible membrane weir parts, which are formed by being divided in the longitudinal direction of the weir, are integrally adhered to each other by post-adhesion. The object of the present invention is to provide a manufacturing method that allows a membrane weir to be easily transported to a site and formed.

As described above, this invention is erected by supplying fluid,
In a flexible membrane weir that collapses due to discharge, the flexible membrane weir is divided in the longitudinal direction and molded into at least two flexible membrane weir parts, using existing manufacturing equipment and one-piece construction technology. The flexible membrane dam part can be manufactured very easily in one piece.

Further, according to the present invention, since the flexible membrane weir is molded in at least two parts, it can be easily transported to construction sites with poor road conditions where large trucks cannot drive.

Furthermore, in the present invention, the flexible membrane weir parts, which are molded in at least two parts, are integrally bonded to each other by adhesive, making it possible to easily construct a large flexible membrane weir at a construction site without manufacturing equipment. It can be manufactured and installed on site.

In addition, when the longitudinally divided parts of the flexible membrane weir are joined together, even if it is assumed that the strength of the joined part is slightly lower than that of the main body, the flexible membrane weir cannot be installed. When internal pressure is applied to the membrane wall, the tensile stress acting in the longitudinal direction of the membrane wall is
Since this is approximately 1/2 of the tensile stress acting in the same circumferential direction, there is no particular problem in practical use.

An embodiment of the present invention illustrated in FIGS. 1 to 7 will be described below.

1 is a rubber sheet 2 (see FIG. 4) which is divided equally into a plurality of sheets in the longitudinal direction and overlapped in the width direction corresponding to the circumferential direction of the rubber weir 1 (see FIG. 5). ) is constructed by bonding a plurality of sheets together by post-adhesion as described later.

The rubber sheet 2 is made of a belt-like woven fabric made of cotton, synthetic fibers, etc., or a thin layer (at least two reinforcing layers 16 made of fiber cord, etc.) are superimposed on each other, and raw rubber 17 is applied to the same reinforcing layer 16. It is a bi-folded rubber sheet which is impregnated and vulcanized.
When the rubber layer 1 expands, the protruding ridges 3 have the function of separating the water flow that flows upward and overflowing the rubber dam 1 from the surface of the rubber dam 1.

Furthermore, the rubber layers 17 on both upper and lower surfaces of the mutually joined end edges of each rubber sheet 2 are removed in parallel to form the notch 15.
is formed, and a reinforcing material 18 having a width approximately twice as wide as the width of the notch 15 is formed, and the reinforcing material 18 is also made by impregnating raw rubber into a reinforcing canvas corresponding to the reinforcing layer, similar to the rubber sheet 2. It has been vulcanized and molded in advance.

The rubber sheet 2 in which the cutout portion 15 is formed and the reinforcing material 18 are produced in a factory.

Rubber sheet-2 divided in this way and reinforcing material 1
8 is appropriately folded or rolled,
It will be transported to the execution site by truck.

At the execution site, a rubber adhesive with high adhesive strength is applied to the cutout portion 15 of each rubber sheet 2, and with the joined edges of the rubber sheets 2 butted against each other, the cutout portion 15 is coated with the rubber adhesive. By attaching the reinforcing material 18 via an adhesive and applying pressure for a predetermined period of time so that a constant pressure is applied to the joined surfaces, the rubber sheets 2 are bonded together.

Next, the tip protrusions 3 at each joint are tightly connected using the reinforcing metal fittings 5.

That is, the reinforcing metal fitting 5 includes a pressing piece 6 having a protrusion 9, a pressing piece 7 having a protrusion 9 and a jaw 8, and four poles.
0, and is attached by inserting and tightening two bolts 10 into each of the protrusions 3 that are connected adjacently through the pressing pieces 6.7 (see Fig. 5.6). .

In addition, the reinforcing metal fitting 5 is arranged so that the pressing piece 7 having a jaw is located downstream of the rubber + 41 in the upright state during use.
Attach it to the protrusion 3 (see Figure 2.6).

The rubber layer 1 manufactured as described above is laid on the riverbed concrete 19 in the steps shown below.

First, as shown in FIG. 3 1tc-a, both longitudinal edges taf of the rubber layer 1 corresponding to the slope 21 of the river bed concrete 19 extend their overlapping side edges 4a to the same rubber weir 1.
The rubber weir 10 is cut diagonally toward the protruding part 3a of the riverbed concrete IJ with the overlapped side edge 4 located in the soil.
-) Presser foot n over the top surface of 19 and both slopes 21
and tighten it with the anchor pole) 23 planted in the river bed conch IJ-) 19.

The embodiments illustrated in FIGS. 1 to 6 and 8 are as follows:
Since the structure is as described above, when air at an appropriate pressure is injected into the rubber layer 1 from an injection port (not shown), the rubber dam 1 is formed as shown in FIGS. 1 and 2.
expands, and the water level of the river rises above the peak of the expanded rubber weir 1, making it possible to take water for agricultural use from an intake port (not shown).

Further, in the above embodiment, the rubber dam 1 includes each rubber sheet 2 which is equally divided into a plurality of sheets in the longitudinal direction and overlapped in the width direction corresponding to the circumferential direction of the rubber dam 1. The length of the long side of the rubber sheet, which can be manufactured using the existing rubber weir manufacturing equipment at the factory, is t.
If the length of the short side is m, it is possible to construct a large rubber weir 1 that is 17 m times larger than the largest conventionally manufacturable rubber weir, and has a weir height of 5 to 6 m, for example.

Furthermore, in the above embodiment, since the rubber weir 1 can be divided into a plurality of rubber sheets 2 beforehand and transported, it is possible to transport the rubber weir 1 by dividing it into a plurality of rubber sheets 2. It can also be easily transported.

Moreover, since each rubber sheet 2 divided into multiple pieces can be bonded together with the reinforcing material 18 and adhesive without using special equipment or tools, it can be used at installation sites in remote areas such as mountainous areas. Also, the com weir 1 can be easily installed.

In addition, as mentioned above, sufficient strength can be obtained by simply gluing each rubber sheet 2 after use, but by attaching a reinforcing metal fitting 5 to the protrusion 3 at the joint, the joint strength at the tip can be increased. The jaws 8 of the pressing piece 7 of the reinforcing metal fitting 5 have the function of protecting the bolt head when the rubber weir 10 collapses.

In the embodiments shown in FIGS. 1 to 6 and 8, the notch 15 of each rubber sheet 2 and the reinforcing material 18 are integrally bonded to each other with adhesive, but as shown in FIG. In order to do this, a planar heat-generating unvulcanized rubber sheet 21 containing special carbon instead of adhesive is interposed between the notch 15 of each rubber sheet 2 and the reinforcing material 18, and the bonding surface is Approximately 2Kg
If a current is applied to the row of unvulcanized rubber sheets while a pressure of /an'' is applied, the sheet U will generate heat due to the electric resistance of each unvulcanized rubber sheet, and the sheet U will be vulcanized. The cutout portion 15 of each rubber sheet 2 and the reinforcing material 18 are bonded together afterward.

In the embodiment shown in FIG. 9, the unvulcanized rubber sheets are vulcanized by heat generation due to electrical resistance, so that the notches 15 of each rubber sheet and the reinforcing material 18 can be formed with high reliability and strength. It has the same strength as a rubber dam that is bonded and molded as one piece.

Further, in the above embodiment, only one step was removed from both sides of each rubber sheet 2 to form the cutout portion 15.
As shown in Fig. 1 and Fig. 11, the outer surfaces of the mutually joined edges of each rubber sheet 2 (the upper surface in the upper part, the lower surface in the lower part') are removed 5 in multiple steps to correspond to the same steps. A reinforcing material may be formed in such a shape that a reinforcing layer similar to the reinforcing layer 16 of each rubber sheet 2 may be buried in the reinforcing material portion at a depth corresponding to each reinforcing layer 16 of each rubber sheet 2. According to such an embodiment, the elastic deformation of the joints of each rubber sheet 2 when the rubber weir expands becomes smooth.Furthermore, in the embodiments shown in FIGS. 6 and 8, each rubber When adhering the protrusions 3 of the sheet 2 with the reinforcing material 18, the reinforcing material 18 is glued so as to be wrapped around the end (see Fig. 6). The press pieces 12 and 13 of the reinforcing metal fitting 11 attached to the protrusion 3 may be bonded so that the cut surface forms a part of the tip edge of the protrusion 3.
The pressing surface of the pressing piece 6.7 shown in FIG.
There is no need to provide the protrusion 9 as shown in FIG.

Furthermore, by changing the shape of the reinforcing metal fitting 5.11 and making it protrude from the tip of the protrusion 3, the spoiler
You can also get the effect of toshiso.

In each of the embodiments described above, the tip protrusions 3 at the joint portions of the divided bodies of the rubber dam I are tightly connected by the reinforcing metal fittings 5.11, but it goes without saying that the reinforcing metal fittings can be omitted.

Furthermore, in the above embodiments, the main constituent material of the flexible membrane weir was rubber, but the flexible membrane weir was made of a synthetic resin other than rubber, and the reinforcing layer was made of a material other than a belt-like woven fabric or fiber cord. You may use the one.

The present invention has been described in detail with respect to the embodiments shown in the drawings and the embodiments not shown in the drawings.
The present invention is not limited to these embodiments, and the design may be freely modified as necessary without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a front view of a rubber dam manufactured according to an embodiment of the present invention in an expanded state, FIG. 2 is a partially cutaway perspective view of the same rubber dam, and FIG. 3 is a deflated state of the same rubber dam. FIG. 4 is a perspective view of the rubber sheet in an unbonded state in the embodiment, FIG. 5 is a perspective view showing the rubber sheet in a connected state, and FIG. Enlarged sectional view,
FIG. 7 is an enlarged sectional view of the main part in another embodiment, FIG. 8 is a perspective view of the main part showing one process of bonding the rubber sheet, and FIG. 9 is a cross-sectional side view of the main part showing another process of bonding the rubber sheet. , 10th
The figure is a perspective view of the main part showing still another bonding process of the rubber sheet, and FIG. 11 is a perspective view of the main part before the bonding process. 1...Rubber weir, 2.2a, 2b...Rubber sheet, 3
．． 3a... Protrusion portion, 4.4a... Overlapping side edge, 5
... Reinforcement metal fitting, 6.7 ... Pressing piece, 8 ... Jaw, 9
... protrusion, 10 ... bolt, 11 ... reinforcing metal fittings,
12.13... Pressing piece, 14... Jaw, 15... Notch, 16... Reinforcement layer, 17... Rubber layer, 18...
...Reinforcement material, 19...River bed concrete, addition...
River bed concrete top surface, 21... Slope, n... Presser foot, n... Anchor bolt, Sae... Unvulcanized rubber sheet, 5... Step-like deletion part, 26... Complementary 'Strong material. Agent: Patent attorney Nozomi Ehara (1 person)

Claims (1)

[Claims] In a flexible membrane weir that rises when fluid δ is injected and collapses when discharged, at least two flexible membrane weir parts that are formed by being divided in the longitudinal direction of the flexible membrane weir are bonded together after bonding. A method for manufacturing a large flexible membrane weir, which is characterized by being integrally bonded to each other.