JPS58199912A - Fitting method of flexible film to foundation - Google Patents

Abstract

PURPOSE:To prevent the concentration of stress on a film member by a method in which the ends of a film are made into two-sheet form, a steel plate is put between the sheeted part and bonded with the sheet part, and the film is fitted to the foundation with a presser fixture. CONSTITUTION:The ends of a film 1, e.g., rubber cloth 31, etc., are made into two-sheet form without bonding, a steel plate 27, e.g., synthetic resin-coated plate, etc., is put between the sheeted parts 22 and 22' and bonded with each other, and the film is vulcanized and bonded to the foundation. The sheeted parts 22 and 22' and the steel plate 27 are fixed through an anchor bolt 28 projected from the foundation 2 by means of a presser fixture 29 and a nut 30. Thus, the force acting on the film 1 is transmitted through the adhesive 25 to the steel plate 27 and supported by the hooking force of the steel plate 27 on the bolt 28. Thus, no stress concentration takes place on the fitting part of the film.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a part for attaching a flexible membrane such as a rubber-coated undulating weir to a foundation such as concrete.

A rubber-coated fabric undulating weir has a rubber-coated fabric bag (covering) that forms the weir body attached to at least the river bed in the direction across the river, and air or A fluid such as water, which is an expansion medium, is fed to cause the bag to expand and stand up, and the fluid is discharged from the inside of the bag to cause the bag to contract and collapse (see, for example, Japanese Patent Publications No. 40-11702 and Japanese Patent Publication No. 44-2371).

Regarding the attachment of this type of flexible membrane to the foundation, (1)
It is required that stress concentration does not occur on the membrane (de), ■ Airtightness and watertightness must be ensured, and ■ Installation work must be simple.

The current mounting section has various problems in meeting the above requirements, as described below. I'll say this now. There are two types of installation of flexible membrane undulating weirs to the tIJ■ floor foundation: single clamp and double clamp as shown in Figure 1.2.

In Fig. 1.2, (1) is a flexible membrane forming the weir envelope (bag-like body), (2) is a foundation, and (6) is a mounting bracket.

The attachment part to the foundation is the same for both clamp types, and the third clamp type is roughly the same.
．． There are two types shown in Figure 4.

(A) Holding type mounting part (see Figure 3) This mounting part holds the flexible membrane (1), the holding plate (6), and the bolt/nut (7).
It is tightened and fixed to the foundation (2).

The fixing force is the tightening of bolts and nuts that corresponds to the sliding of the membrane, and is expected to produce frictional force between the holding plate, foundation, and membrane. However, due to compression set of the membrane, loosening of the nut, etc., the expected frictional force cannot be obtained, and the membrane becomes stuck to the bolt through the hole drilled in the membrane.

For this reason, concentrated stress acts on the holes in the membrane, causing damage to the membrane.

In FIG. 3, (5) is a metal fitting, (8) is a sealing material (necessary only for the air expansion type), and (10) is a rod welded to the metal fitting (5).

Wind-up type mounting part (see Figure 4) This mounting part uses a flexible membrane (1) to wrap around the rod (11) and tube (12), and hold them down using the metal fitting (13) and bolt
(14) is used to hold it down and fix it to the foundation (2). In addition, epoxy resin (
15).

The fixing force is due to the frictional force between the metal fittings, foundation and membrane due to the tightening of the bolts and nuts, and the wedge-shaped rod and tube parts.
The above-mentioned mounting part does not create holes in the membrane and does not apply concentrated stress, making it an ideal fixing means from the viewpoint of the strength of the membrane. However, the construction work is complicated, such as winding up rods and tubes and injecting epoxy resin.

In FIG. 4, (16) is the base plate, (17) is the rubber backing, (18) is the bar, (19) is the sealing comb fabric, and (20) is the cover sheet.

In view of the above, the present invention has been developed to solve these problems. The invention will now be explained in detail with reference to the exemplary drawings. Since the mounting portion of the present invention is similar for both single clamp and double clamp types, the structure of the double clamp type is shown in FIG.

The mounting part of the present invention is made of two sheet-like sheets that do not adhere to each other at the ends of the membrane (1), such as rubber-coated cloth, and between these sheet-like parts (22) and (22'), there is an iron plate or a synthetic resin plate. A rigid plate (27) is sandwiched between the rigid plate and two sheet-like parts (22).
.

(22') is bonded, for example, temporarily bonded by vulcanization. (25) is an adhesive for this purpose.

Insert this glued sheet-like part/rigid plate into the anchor bolt (28) protruding from the foundation (2) and hold it down using the metal fitting (29).
It is fixed at % knots (60). In the figure (2
3) is the part where one sheet-like part is pasted to the other sheet-like part to form two sheet-like parts, and (24) and (26) are the holes for passing the anchor bolts. .

In this mounting part, holes are drilled in the membrane material, but unlike conventional methods, the force applied to the membrane is transmitted to the rigid plate via adhesive, and is caused by the force of the rigid plate catching on the bolts. Therefore, the main attachment part becomes an attachment part where the concentrated stress of the membrane does not act. In addition, the adhesive force between the membrane (sheet-like part) and the rigid plate was improved by the initial holding metal fittings,
This can be fully expected from the pressure caused by tightening the nut.

Although the attachment portion of the present invention has been described with respect to a flexible membrane undulating weir membrane, the present invention is not limited thereto.

As described above, according to the present invention, a mounting portion that satisfies the requirements (1) to (3) mentioned at the beginning can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 both show cross-sectional views of the flexible membrane undulating weir taken in the river flow direction, and Figure 1 shows the single clamp type,
Figure 2 shows a double clamp system. Figures 3 and 4 both show sectional views of the attachment portion of a conventional flexible membrane undulating weir to the base of the membrane, with Figure 3 showing the holding type type and Figure 4 showing the rolling type type. FIG. 5 is a diagram illustrating the attachment part of the membrane of the present invention to the foundation, and FIG. The end of the membrane and the cross-sectional view of the mounting part assembled and completed using the rigid plate of (bl) are shown respectively. (1)...Flexible membrane, (2)...Foundation, ( 22)
, (22')... Sheet-like part, (23)...
Bonding part, (24)... Bolt hole, (2b).
・・Adhesive, (26) ・・Bolt hole, (27)・・
・Rigid plate, (28)... Anchor bolt, (29)...
・Suppressing metal fittings, (50)...Natsuto, ・'Po・ Agent Patent attorney Masashi Yoshitake ・'1 Figure 1 Figure 2 O 4 Figure

Claims (1)

[Claims] (1) Form the ends of the membrane into two sheets that are not glued to each other, sandwich a rigid plate between these sheet-shaped parts, and glue the rigid plate and the sheet-shaped part, and then bond the bonded sheet-shaped part and the rigid plate. An attachment part for a flexible membrane to a foundation, characterized in that the flexible membrane is attached to an anchor bolt protruding from the foundation using a presser foot and a nut.