JPH11229357A - Sheet-shaped dam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dam facilitating both civil engineering work and machine installation work, reducing the trouble or designing, and bring easy to install in an existing channel. SOLUTION: A sheet main body 2 crossing a channel 1 has its upstream part 2H extended along the cross section of the channel 1 and secured thereto and has its downstream part 2L given rigidity throughout the width of the channel to raise and lower a dam. When water is passed, the sheet main body 2 crossing the channel 1 is shaped to extend along the wall surface of the channel so as not to inhibit the water-passing cross section or the channel, and since the dam can be raised from the channel 1 by lifting the downstream part 2L of the sheet main body 2, civil engineering work allowing easy construction of the dame and machine installation work are made possible. Also, the trouble of designing the channel is reduced, and the dam becomes easy to install in an existing or small-scale channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to sheet-like weirs for small-scale waterways or temporary enforcement.

[0002]

2. Description of the Related Art Conventionally, weirs installed in waterways are generally roller gates, slide gates, and overturning weirs.
The laget and slide gate are constituted by a door body having the same shape as the cross section of the water channel and a door stop for holding the hydraulic load acting on the door body in the water channel or for achieving watertightness between the water channel and the door body. In this case, the waterway is raised or lowered by sliding the door up and down along the door. Further, the overturning weir has a door body having the same shape as the cross section of the waterway, and a hinge for pivotally supporting the bottom of the door body to the wall surface of the waterway,
A contact plate buried in the side wall surface of the waterway to achieve watertightness between the waterway side wall surface and the side of the door body,
By rotating the door about the hinge as the center of rotation,
The channel was raised and lowered. In addition,
Japanese Patent Application Laid-Open No. 21944 discloses a temporary cofferdam made of rubber-coated cloth. As shown in FIG. 4, a steel girder 10 is fixedly mounted on the bottom wall of the water channel 1, and the rubber girder is attached to the girder 10. The bag 9 made of cloth is adhered, and water is poured into and drained from the bag 9 made of rubberized cloth, thereby expanding and contracting the bag 9 made of rubberized cloth to raise and lower the water channel.

[0003]

However, in the case of roller gates, slide gates and overturning weirs, it is necessary to bury a door stop or a contact plate on the side wall of the channel, and special consideration is required when designing the channel. And, in each construction,
Since it is a steel structure, it is heavy and must be buried in accordance with the progress of construction of civil engineering structures, requiring a great deal of labor and time. Improper. Further, when each of the weirs is arranged in an existing waterway, a part of the waterway must be broken, and its construction involves many difficulties. Furthermore, in the case of the temporary closing weir made of rubber-coated cloth, it is necessary to fix a steel girder in the waterway, which requires a great deal of labor and time.

[0004] An object of the present invention is to solve the above-mentioned problems in the prior art, in which both civil works and mechanical installation work are easy, the design work is not required, and the seawater can be easily installed in existing waterways. To provide a weir.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned object, according to the present invention, an upstream portion of a sheet main body crossing a water channel is fixed along a cross section of the water channel, and the downstream side portion extends over the width of the water channel. It is characterized by having rigidity and raising and lowering the dam.

According to the present invention, at the time of damping, the sheet main body crossing the water channel has a shape along the water channel wall so as not to obstruct the water channel cross section, and the downstream side of the sheet main body is pulled up. And canal canals.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a sheet-like weir according to an embodiment of the present invention is formed of a lightweight flexible sheet main body 2 made of a rubberized cloth, and has a water passage cross section when water is passed. The bottom wall 1a and the side wall 1 of the waterway 1 so as not to obstruct
b, and the upstream side 2 of the sheet body 2
H is fixed to the bottom wall surface 1a and the side wall surface 1b of the waterway 2, and the downstream side 2L has rigidity over the width of the waterway, and
It is designed to be lowered. The shape of the sheet body 2 is such that both sides 2b and the bottom 2a are continuous, and the bottom 2a has a side perpendicular to the flowing water direction F extending from one side wall 1b of the water channel 1 to the other side wall 1b. When the length parallel to the flowing water direction F up the water channel 1 (see FIG. 2)
The height is almost the same as the water level. The side part 2b has a flowing water direction F from the lower end to the upper end of the side wall surface 1b.
The bottom 2a is formed in a fan shape in which the side provided in parallel with the flowing water direction F of the bottom 2a is continuous in a curved line, and at the time of damming, the side 2b is folded into two with the downstream side being a valley. The curved shape is determined so that the weir of the folded portion does not become partially low. Further, the side portion 2b is formed in a bellows shape or a shape that is completely folded at the time of rising, so that water is not easily contained at the time of rising, so that the top of the weir does not become partially low. It is also possible.

The upstream side 2H of the sheet body 2 is
b and a bottom 2a are fixed to both side walls 1b and a bottom wall 1a of the water channel in a watertight manner, and the bottom 2a extends from one side wall 1b to the other side wall 1b of the bottom wall 1a via a presser foot 4 with an anchor bolt 3a. The two side parts 2b are fixed to the anchor bolt 3 via the presser foot 4 while being inclined in the flowing water direction from the upper end to the lower end of the side wall surface 1b. Further, both sides 2b and the bottom 2a of the upstream side 2H of the sheet body 2 are firmly fixed by the presser 4 and the sheet body 2 is an elastic body. It will be securely mounted and watertight will be achieved. In addition,
Since the work for installing the main body 2 in the water channel 1 requires only the construction of the anchor bolts 3 by civil engineering work, no special consideration is required for the civil engineering work of the water channel 1 and the existing water channel 1
It can be easily attached to

As shown in FIGS. 2 and 3, the downstream side 2L of the sheet body 2 has a rigid rod 5 having substantially the same length from one side wall 1b to the other side wall 1b. It is provided, at the time of rise, constitutes the top of the weir, by the rigidity of the rod body 5,
This prevents the dam of the sheet main body 2 from being deformed by the hydraulic load. At both ends of the rod body 5, hanging metal fittings 6 are connected, and a wire rope 7 is connected to the hanging metal fitting 6, and the other end of the wire rope 7 is a sheet. Winch 8 installed on upper wall 1c of both side walls 1b upstream of main body 2
It is being wound up. Further, a mechanical float is connected to the other end of the wire rope 7, and the downstream portion 2L of the sheet main body 2 is moved up and down by the up and down movement of the float to ascend and descend. It is also possible.

The operation of the weir according to the embodiment of the present invention will be described with reference to FIGS. At the time of water flow, as shown in FIG. 1, the wire rope 7 is unwound from the winch 8, and the sheet main body 2 is brought into a state along the bottom wall surface 1a and both side wall surfaces 1b of the water channel 1 to impede water flow. Not to be. When the water is blocked, the winch 8 is wound up to pull up the rod 5 provided on the downstream side 2L of the sheet main body 2 via the wire rope 7. Since 5 is a rigid body, it is not deformed by water pressure. Further, by pulling up the rod 5, the sheet body 2
However, both sides 2b are gradually erected in a state of being folded into two, and the water flow is gradually blocked, and finally rises to a predetermined height. In this state, the weirs at the folded portions of both side portions 2b are formed in a curved shape so as not to be partially lowered, and do not leak to the downstream side. When the sheet body 2 is in the standing state, the upstream side 2H of the sheet body 2 is firmly fixed by the presser 4 and the sheet body 2 is an elastic body. It is securely fixed to the wall surface 1b, and watertightness is achieved.

[0011]

According to the present invention, the upstream side of the sheet body crossing the waterway is fixed along the cross section of the waterway, and the downstream side has rigidity over the width of the waterway, and is raised and lowered. As a result, when the water is passed, the sheet main body crossing the water channel has a shape along the water channel wall so as not to obstruct the water channel cross section, and the downstream side portion of the sheet main body is pulled up to rise the water channel. Therefore, the construction of the weir becomes possible by simple civil engineering work and mechanical installation work, and there is no need to design a waterway, and it is easy to install the existing waterway or a small waterway.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which water flows through a sheet-like weir according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the sheet-like weir according to the embodiment of the present invention is blocked.

FIG. 3 is a vertical sectional side view of FIG. 3;

FIG. 4 is a diagram illustrating a weir made of rubberized cloth according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterway 2 Sheet main body 3 Anchor bolt 4 Presser foot 5 Bar body 7 Wire rope 8 Winch

Claims (1)

[Claims] An upstream side of a sheet main body crossing a waterway is fixed along a cross section of the waterway, and a downstream side is provided with rigidity over the width of the waterway to be raised and lowered. Sheet weir.