JP2005336765A - Bag-shaped roof weir - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag-shaped roof weir which can reduce a waterfall sound of an overflow flowing over the weir. <P>SOLUTION: A rubber bag body 3, which switches between a rising state and a tilted state by supplying/discharging a fluid such as air, is installed in the state of crossing a river 2. A flow straightening fabric 5 is arranged in such a manner as to cover the bag body 3. The vicinity 10 of the end of the fabric 5, which is arranged on the downstream side of the river 2, is connected to a member 11 (e.g. a rubber rope) with elasticity, which is fixed to a river bed 6 on the downstream with respect to the bag body 3. When the bag body 3 is put into the erected state by supplying the air etc. into the bag body 3, a slide-like inclined plane 12 is formed in the direction of the member 11 from a top part of the bag body 3 by using the fabric 5 which is arranged on the downstream side with respect to the top part of the bag body 3. The overflow flowing over the top part of the bag body 3 is diagonally flown along the inclined plane 12 which is formed by using the fabric 5, so that the waterfall sound can be reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bag hoisting weir using a rubber bag body that can be erected and laid down in a river, and in particular, the noise of overflow water that flows over the rubber bag body downstream when the rubber bag body stands up. The present invention relates to a bag body weir to be reduced.

  Conventionally, a bag-like undulation weir consisting of a rubber bag that is placed across a river and changes to a standing or lying state by supplying or discharging fluids such as water or air, and storing or flowing down the river water Known from. When storing river water, the rubber bag body is supplied with the air or the like, and the rubber bag body is inflated to stand up. On the other hand, when the river water stored as described above is removed, the air or the like is discharged from the rubber bag body so that the rubber bag body is in a lying state and the river water is allowed to flow downstream.

However, in the case of the bag-like undulation weir having such a configuration, when the stored flowing water overflows and flows out from the top of the rubber bag body, a negative pressure is generated between the rubber bag body and vibration is generated thereby. In addition to causing noise, there is a problem that affects the durability of the rubber bag.
Therefore, as means for solving this problem, there is one disclosed in Patent Document 1, and a device in which a net-like fin 24 is provided near the top of a rubber weir 21 as shown in FIG. 6 is disclosed. According to this, the flow of the water flow (referred to as “overflow water”) overflowing the top of the rubber weir 21 by the net-like fins 24 is randomized, and the negative pressure between the bag-like body of the rubber weir and the overflow water is reduced. Can be in a state. Further, it is possible to absorb and reduce the impact on the fins caused by the collision of overflow water or driftwood. Accordingly, the vibration of the rubber weir can be reduced, the generation of noise can be suppressed, and the deterioration of the durability of the rubber weir caused by the collision such as vibration or overflow can be improved.

Japanese Patent Laid-Open No. 11-303051

  However, in the invention of Patent Document 1, it was possible to suppress the noise caused by the vibration of the rubber weir, or the noise caused by the collision with the fin attached to the rubber weir. However, the overflow water has a low water level. The sound of falling water when falling downstream could not be suppressed. That is, when the river weir is stored with the rubber weir standing, the upstream water depth of the rubber weir reaches the top of the rubber weir. Therefore, the overflow water falls from the top position of the rubber weir to the downstream water level, and a falling sound is generated at that time. In the invention described in Patent Document 1, there is a problem that it is not possible to reduce the occurrence of falling water sound due to the overflow water.

  Therefore, the present invention has been made in view of such circumstances, and can reduce the occurrence of falling noise due to overflow water, and can efficiently raise the rubber bag and change the lying state. The purpose is to provide a bag body weir.

  In order to solve the above-mentioned problem, the invention of the bag-like undulation weir according to claim 1 has installed a rubber bag body that can stand up and fall by a fluid containing air being supplied and discharged across the river. In the bag-like undulation weir, there is provided a rectifying cloth for diagonally flowing the overflow water flowing over the rubber bag body when the rubber bag body stands up.

  When the rubber bag body stands up, the river water is stored, the water level upstream of the rubber bag body reaches the dam top position of the rubber bag body, and there is a difference between the water level upstream and downstream of the rubber bag body . When the stored upstream water level exceeds the weir top position of the rubber bag body, the stored water overflows over the rubber bag body. The water that flows over the top of the rubber bag is called overflow water, and the overflow water falls from the position of the top of the rubber bag to the downstream water surface. Therefore, a flow rectifying cloth is disposed from the top of the rubber bag body to the downstream water surface, and the overflow water is caused to flow obliquely along the flow rectifying cloth, thereby reducing the occurrence of a falling sound.

  In order to solve the above-mentioned problem, the invention of the bag-like undulation weir according to claim 2 is the invention of claim 1, wherein the rectifying cloth is disposed so as to cover the rubber bag body, and the upstream rectifying cloth is provided. The end of the rubber bag is fixed to the river bed with a fixing member, and the end of the downstream rectifying cloth or the vicinity thereof is a stretchable member fixed to the river bed downstream of the position of the rubber bag. It is characterized by being connected.

  The end of the rectifying cloth, which is arranged from the top of the rubber bag body to the downstream water surface, is located on the upstream side of the river, is fixed to the river bed together with the rubber bag body, and the rubber bag body Since it is arrange | positioned so that it may cover, while flowing down overflow water along the upper surface of a baffle cloth, it acts also as a protective material of a rubber bag body. Further, the end portion of the flow regulating cloth disposed on the downstream side of the river or the vicinity of the end portion is attached to a member having elasticity, and the member having the elasticity is downstream from the position of the rubber bag body. Since it is fixed to the river bed on the side, the rectifying cloth ensures that the overflow water flows diagonally without being deformed by the pressure of the flowing water.

  In order to solve the above-mentioned problem, the invention of the bag-like undulation weir according to claim 3 is arranged downstream of the top position of the rubber bag body in the standing state in the invention of claim 1 or 2. The rectifying cloth is drawn toward the downstream river bed to which the rectifying cloth is fixed by the tension of the elastic member to form a slide-like inclined surface. Since the end of the rectifying cloth disposed in the downstream side of the river or the vicinity of the end is pulled by a member having elasticity, the inclined surface formed by the rectifying cloth is the standing state of the rubber bag body The flat slide shape is maintained even when changes occur.

  In order to solve the above-mentioned problem, the invention of the bag-like undulation weir according to claim 4 is the invention according to any one of claims 1 to 3, wherein an end portion of the downstream rectifying cloth or the vicinity thereof has a predetermined interval. It is connected to a plurality of members having elasticity that are placed and fixed to the river bed. Between the end of the rectifying cloth or the vicinity thereof and the river bed, the river water is arranged in a state that allows water to pass therethrough. It is characterized by being. By making the river water flowable between the end of the flow rectifying cloth or the vicinity thereof and the river bed, the running water, mud, etc. stored below the flow rectifying cloth are discharged in the downstream direction.

  According to the bag-like undulation weir according to the present invention, an inclined surface can be formed from the top of the rubber bag body to the downstream river bed by the rectifying cloth, so that the overflow water is allowed to flow diagonally along the inclined surface. It is possible to reduce noise generated by water falling from the top of the rubber bag. In addition, by pulling the downstream end of the rectifying cloth, etc., in the downstream direction of the river with a stretchable member, a flat inclined surface can be formed by the rectifying cloth, and the overflow water can flow along the rectifying cloth. It is possible to reliably flow diagonally and reduce the sound generated by falling water.

Embodiments of a bag-like undulation weir according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a cross-sectional view of a bag-like undulation weir installed across a river. River 2 is upstream in the left direction of the figure. The bag-like undulation weir 1 is disposed extending in the width direction of the river 2, that is, from the front side to the back side in the figure, and crosses the river 2. The bag-like undulation weir 1 is generally composed of a rubber bag 3 that can be changed to a standing state or a lying state, and a rectifying cloth 5 that is disposed so as to cover the rubber bag 3. The rubber bag body 3 is made of a flexible material that is characteristic of the rubber-drawn undulation weir. A part of the rubber bag body 3 is fixed to the river bed 6 by a fixing member 7 and is formed in a sealed bag shape. Yes. For example, it is formed by bonding four rounds of two rubberized cloths or by bonding three rounds of one rubberized cloth, and the bonded side is fixed to the riverbed 6 by the fixed hardware 7 on the upstream side of the river 2. Has been.

  The rubber bag body 3 has a mechanism in which a fluid is supplied or discharged into the rubber bag body 3 and expands or contracts. As the fluid supplied into the rubber bag body 3, water or air is generally used. . FIG. 1 shows a form in which air is supplied and discharged as a fluid. An air supply / exhaust pipe 9 extending from a blower 8 provided outside the river 2 is communicated with the rubber bag body 3. By supplying air to the rubber bag body 3 through the air supply / exhaust pipe 9, the rubber bag body 3 is connected. The body 3 expands and stands up, and conversely, by discharging air through the air supply / exhaust pipe 9, the rubber bag body 3 shrinks and falls down.

  The rectifying cloth 5 is for flowing the flowing water that has overflowed beyond the top of the rubber bag 3 out of the flowing water stored on the upstream side of the rubber bag 3 toward the downstream side in an oblique direction. When air as a fluid is fed into the rubber bag body 3 by the blower 8, the rubber bag body 3 expands and stands up to block water flowing upstream of the river 2. The running water stored on the upstream side of the rubber bag body 3 gradually increases its depth, reaches the top of the rubber bag body 3, passes over the rubber bag body 3, and flows into the downstream side as so-called overflow water. The rectifying cloth 5 is disposed so as to cover the rubber bag body 3, and the upstream end of the rectifying cloth 5 (the end of the rectifying cloth 5 disposed on the upstream side of the river 2) is a rubber bag body. 3 is fixed to the river bed 6 by a fixing member 7. Although FIG. 1 shows the case of fixing together with the rubber bag body 3, the rectifying cloth 5 may be fixed to the river bed 6 separately from the rubber bag body 3.

  Further, the downstream end portion 10 a of the rectifying cloth 5, or the end vicinity 10 that enters the inside (upstream side in the river 2) from the end portion is connected to a member 11 having elasticity that is fixed to the river bed 6. Yes. The elastic member 11, for example, the rubber rope 11 is fixed to the river bed 6 on the downstream side of the position of the river bed 6 where the rubber bag 3 is disposed by the fixing member 13. A plurality of rubber ropes 11 are fixed in the river width direction at predetermined intervals, for example, at intervals of about 400 mm. Thereby, when the rubber bag body 3 is in the standing state, the inclined surface 12 is formed by the rectifying cloth 5 arranged on the downstream side of the top portion of the rubber bag body 3, and the overflow water flows diagonally by the inclined surface 12. Will do. In addition, by covering the upstream side of the rubber bag body 3 in which running water is stored with the rectifying cloth 5, it is possible to prevent damage to the rubber bag body 3 due to collision of driftwood, rolling stones, and the like.

  In order to cause the overflow water to flow diagonally to the riverbed 6 without falling, when the inclined surface 12 is formed by the rectifying cloth 5, the downstream end 10 a of the rectifying cloth 5 reaches the riverbed 2. That is, it is desirable that the end portion 10a of the rectifying cloth 5 is disposed so as to extend downstream from the position of the fixing member 13 of the member 11 having elasticity. Therefore, in order to realize such a configuration, it is desirable to connect the vicinity 10 of the end portion that enters the inner side from the end portion 10a of the rectifying cloth 5 to the member 11 having elasticity, whereby the rubber bag 3 Even when there is little river water on the downstream side of the river, it is possible to flow diagonally up to the riverbed 6 without dropping the overflow water, so that the silencing effect can be enhanced.

  FIG. 2 is an enlarged view showing the downstream end portion 10a and the end vicinity 10 of the flow straightening cloth 5, and shows a state where the end vicinity 10 is connected to a member 11 having elasticity. The rectifying cloth 5 indicated by a solid line and the elastic member 11 show a state when the rubber bag 3 is in an upright state and flowing water is stored on the upstream side, and has elasticity with the rectifying cloth 5 indicated by a broken line. The member 11 shows a state in which the rubber bag 3 is in an upright state and running water is not yet stored on the upstream side.

  Here, the reason why the rectifying cloth 5 and the elastic member 11 are in the state indicated by the solid line or the broken line as shown in FIG. 2 will be described with reference to FIG. FIG. 3 shows a state of the rubber bag body 3 when the rubber bag body 3 is in a standing state and flowing water is stored upstream thereof (a rubber bag body 3 indicated by a solid line), and a rubber bag body when the rubber bag body 3 is not stored. 3 shows a rubber bag body 3 indicated by a broken line. Immediately after the air has been supplied into the rubber bag body 3 by the blower 8, that is, immediately after the rubber bag body 3 stands up and starts storing the flowing water, the depth of the flowing water stored on the upstream side is still In the shallow state, the water pressure from the upstream side to the downstream side applied to the rubber bag body 3 due to the stored flowing water is small, so that the rubber bag body 3 maintains the posture standing up in a substantially vertical direction as indicated by a broken line. However, when the depth of running water stored on the upstream side of the rubber bag body 3 becomes deep, the water pressure from the upstream side to the downstream side on the rubber bag body 3 increases due to the stored running water, and the rubber bag body 3 is shown by a solid line. As shown in Fig. 2, the upright state is inclined in the downstream direction.

  In this way, when the standing posture of the rubber bag body 3 changes depending on the amount of the stored flowing water, the rectification formed in the direction from the top of the rubber bag body 3 toward the fixing member 13 of the downstream river bed with this change. The angle of the inclined surface 12 by the cloth 5 changes. In addition, as the posture of the rubber bag 3 and the inclination angle of the rectifying cloth 5 change, the amount of expansion / contraction of the elastic member 11 changes. That is, when the rubber bag 3 is in an upright state in which the rubber bag body 3 is inclined to the downstream side, the elastic member 11 increases the inclination angle by an amount corresponding to the inclination and shifts in the downstream direction of the river 2. As shown by the solid line in FIG. 2, when the rubber bag body 3 stands up in a substantially vertical direction, the rectifying cloth 5 decreases the inclination angle and shifts in the upstream direction of the river 2. Stretch like so. And since the elastic member 11 expands and contracts following the standing state of the rubber bag 3, the rectifying cloth 5 is always pulled by the tension of the elastic member 11 and is formed by the rectifying cloth 5. The inclined surface 12 forms a slide-like inclined surface 12 that is substantially flat without causing slack. Thereby, since the overflow water flows diagonally so as to slide along the inclined surface 12 formed by the rectifying cloth 5, the sound of falling water can be reduced.

FIG. 4 shows a cross-sectional view of another form of bag-like undulation weir installed across the river.
In this embodiment, the recessed portion 15 is formed in the river bed 6 in order to store the rubber bag 3 and the flow regulating cloth 5 which are in a fallen state due to the discharge of air below the planned river bed height. The other members constituting the bag-like undulation weir are the same members as the members shown in FIG. The blower 8 and the air supply / exhaust pipe 9 shown in FIG. 1 are not shown.

  When air is supplied to the rubber bag body 3, as shown in FIG. 4, the rubber bag body 3 is in an upright state, the running water is blocked by the rubber bag body 3, and the running water is stored upstream. When the water level of the stored flowing water exceeds the top of the rubber bag body 3, it overflows and flows downstream. Among the flow regulating cloths 5 arranged so as to cover the rubber bag body 3, the flow regulating cloth 5 arranged on the downstream side of the top of the rubber bag body 3 enters inside from the downstream end 10 a. The vicinity 10 of the end is connected to a plurality of members 11 having elasticity that are fixed to the river bed 6 by fixing members 13. Thereby, the baffle cloth 5 forms the slide-like inclined surface 12 without causing slack, and causes the overflow water to flow obliquely along the inclined surface 12 without dropping overflow water. The downstream end portion 10 a of the rectifying cloth 5 is disposed so as to extend to the river bed 6 on the downstream side of the position of the fixing member 13. Since the rectifying cloth 5 is connected to the fixing member 13 in the vicinity of the end 10 that enters the inside from the downstream end 10 a, the downstream end 10 a of the rectifying cloth 5 (precisely connected to the fixing member 13). The portion on the downstream side of the portion that has been placed is simply placed on the riverbed 6.

  In a state where the rubber bag body 3 stands up, a space portion surrounded by the rubber bag body 3, the inclined surface 12 of the rectifying cloth 5, the river bed 6, and the river side wall is formed below the inclined surface 12 formed by the rectifying cloth 5. Is formed. Since this space portion has a gap between the rubber bag 3 and the side wall of the river, or between the rectifying cloth 5 forming the inclined surface 12 and the side wall of the river, the inclined surface is formed from this gap. Running water (including overflow water) enters under 12. Since this running water also contains mud and the like, water, mud and the like are stored in the river bed 6 (portion where the recess 15 is formed) below the inclined surface 12.

  When the air in the rubber bag body 3 is discharged in such a state, the rubber bag body 3 gradually shrinks. FIG. 5A is a view when the air is discharged from the rubber bag body 3 to put the rubber bag body 3 in a lying state. The flow straightening cloth 5 arranged so as to cover the rubber bag body 3 as shown in FIG. 4 has an upstream portion on the upper side of the rubber bag body 3 and a downstream side as the rubber bag body 3 falls down. Lay down on the riverbed 6 At this time, since the downstream end portion 10a of the rectifying cloth 5 is simply placed on the river bed 6 as described above, water can be passed between the end portion 10a and the river bed 6. It has become.

  As a result, the water, mud, etc. stored in the river bed 6 (the river bed in which the recess 15 is formed) below the inclined surface 12 will flow along with the fallen state when the rubber bag body 3 and the current flow cloth 5 fall down. Specifically, from the side of 5, for example, by the overflow water flowing into the lower surface of the inclined surface 12 from the gap between the side end of the rectifying cloth 5 and the side wall of the river 2, the end 10 a of the rectifying cloth 5 It is discharged downstream through the lower side. Therefore, since the amount of mud remaining in the recess 15 when the rubber bag 3 is laid down is extremely small, the rectifying cloth 5 is engulfed by the residual mud or the like, and the rectifying cloth 5 that has fallen down has an uneven state. In addition, it is possible to prevent the problem that the rectifying cloth 5 is expanded by the residual mud and the height of the weir by the rubber bag 3 is lowered. As shown in FIG. 5A, the fallen rubber bag 3 and a part of the rectifying cloth 5 are stored in a recess 15 formed in the river bed 6. Further, as shown in FIG. 5B, the end portion 10a of the downstream flow straightening cloth 5 and the vicinity 10 of the end portion have the stretchable member 11 in the direction of the arrow (downward) to fix the fixing member 13. Since it rotates and moves to the center, it is arranged in a state where it reaches the downstream river bed 6 (the river bed 6 in which the recess 15 not shown) is not formed, rather than the river bed 6 in which the recess 15 is formed.

  Further, in the configuration of the bag-like undulating weir, when the river 2 is increased in a state where the rubber bag body 3 stands up, the rubber bag body 3 is maintained in an upright state until the predetermined lodging water level is reached, and the falling water level is reached. Sometimes, the air in the rubber bag 3 can be discharged by the water pressure of the river 2 through the air supply / exhaust pipe 9. In this case, the rubber bag body 3 is in a fallen state in a predetermined time based on the air discharge amount, but in the process of falling down, a part of the rubber bag body 3 is depressed in advance, and that part is landed to flow the water. A so-called V-notch phenomenon occurs in which the gas flows in one place. Even when this V-notch is generated, mud is formed below the inclined surface 12 from the gap between the rubber bag 3 and the side wall of the river 2 or from the gap between the rectifying cloth 5 forming the inclined surface 12 and the side wall of the river 2. Etc. (including overflow water).

  Therefore, even when the V-notch phenomenon occurs, the end 10a on the downstream side of the rectifying cloth 5 is arranged in a state where it is simply placed on the river bed 6 as described above, so that the end 10a and the river bed are arranged. The water, mud, etc. stored in the river bed 6 below the inclined surface 12 (the river bed in which the recess 15 is formed) can be transferred from the recess 15 to the rectifying cloth 5. Can pass through the lower side of the end portion 10a and be discharged downstream.

  In addition, in the case of the form shown in FIG. 1, it is the same in the case of the form shown in FIG. 1 that the flowing water and the overflow water containing mud etc. enter the lower side of the flow regulating cloth 5 that forms the inclined surface 12. By connecting the end portion 10a on the downstream side of the rectifying cloth 5 so as to be simply placed on the river bed 6 as described above Since the space between the end portion 10a of the rectifying cloth 5 and the river bed 6 can pass through the water, when the air is discharged from the rubber bag body 3 and laid down, the pressure caused by the fall of the rubber bag body 3 and the rectifying cloth 5 The water, mud, etc. stored below the inclined surface 12 of the flow regulating cloth 5 can pass through the lower side of the end portion 10a and be discharged downstream.

It is sectional drawing which shows one form of the bag-like undulation dam concerning this invention. It is the elements on larger scale which show the edge part vicinity of the baffle cloth which comprises the bag-shaped undulation weir shown in FIG. It is sectional drawing which shows the state by the difference in the water level of the stored flowing water of the rubber bag body which comprises the bag-like undulation weir shown in FIG. It is sectional drawing which shows another one form of the bag-like undulation weir concerning this invention. (A) is sectional drawing which shows the fall state of the bag-like undulation weir shown in FIG. (B) is a figure which shows the mode of the member which has a stretching property at the time of a bag-like undulation weir falling down. It is a perspective view which shows one form of the conventional bag-shaped undulation weir.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag-like undulation weir 2 River 3 Rubber bag body 5 Rectification cloth 6 River bed 7 Fixed member 8 Blower 9 Air supply / exhaust pipe 10 End part vicinity 10a End part 11 Member with elasticity 12 Inclined surface 13 Fixed member 15 Recessed part

Claims (4)

In a bag-like undulation weir that is installed across a river with a rubber bag body that can stand up and fall when fluid containing air is supplied and discharged,
A bag-like dam according to claim 1, wherein a rectifying cloth is provided for allowing the overflow water flowing over the rubber bag body to flow obliquely in the downstream direction of the river when the rubber bag body stands. The rectifying cloth is disposed so as to cover the rubber bag body, and the end portion of the upstream rectifying cloth is fixed to the river bed together with the rubber bag body by a fixing member, and the end portion of the downstream rectifying cloth or the vicinity thereof is 2. The bag-like undulation weir according to claim 1, wherein the bag-like undulation weir is connected to a member having elasticity that is fixed to a river bed downstream from the position of the rubber bag body. The rectifying cloth disposed on the downstream side of the top position of the rubber bag body in the standing state is pulled toward the downstream river bed to which the rectifying cloth is fixed by the tension of the elastic member, The bag-like undulation weir according to claim 1 or 2, wherein a slide-like inclined surface is formed. An end portion of the downstream rectifying cloth or the vicinity thereof is connected to a plurality of members having elasticity that are fixed to the river bed at a predetermined interval, and an end portion of the rectifying cloth or the vicinity thereof, and the river bed The bag-like undulation weir according to any one of claims 1 to 3, wherein the river water is arranged in a state where river water can pass therethrough.

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