JP2016211208A - Manufacturing method of concrete barrier in channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a concrete barrier capable of reducing a channel cross section or blocking a channel in the channel that keeps fluid flow.SOLUTION: A fluid F flows from upstream to downstream in a channel C. A frame member 3 is fixed in the channel C so that a gap through which the fluid F flows is ensured. A pipe body 6 is fixed to the frame member 3 and extended in a flow direction. A sheathing board member 2b is temporarily disposed by a temporary part 7 so that the gap through which the fluid F flows is ensured. A downstream formwork 2 is constructed by releasing the temporary disposition of the sheathing member 4 and moving the sheathing member to downstream side and fixing the member to the frame member 3. At this time, the state where the fluid F flows from upstream to downstream through inside of the pipe body 6 is maintained. An upstream formwork is constructed at a position on upstream side of the downstream formwork 2, and concrete is installed between these formwork and cured to manufacture a concrete barrier 1.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing a concrete partition wall in a flow path, and more particularly, a concrete partition wall that reduces a cross-sectional area of a flow path or closes the flow path in a flow path in a state where a fluid flow is maintained. The present invention relates to a method for manufacturing a concrete partition wall in a flow path that can be efficiently manufactured while reducing the labor even if the flow path cross-sectional area is large.

  Conventionally, when blocking the flow path or changing the cross-sectional area of a water distribution pipe or the like for irrigation water, temporarily lower the water level in the flow path or flow the fluid in the flow path. It is installed in the state that stopped. If it is necessary to maintain the flow of the fluid as it is, a temporary bypass water channel that bypasses the flow path at the work site is provided to allow the upstream fluid to flow downstream, or the upstream fluid can be appropriately discharged by a pump device. It was necessary to take measures such as sucking up and discharging to the downstream side.

  In order to solve the above problem, a method of manufacturing a partition wall in a flow channel without stopping the flow of fluid in the flow channel has been proposed (see Patent Document 1). In this proposed method, (1) a step of excavating the ground around the position where the partition wall is manufactured and exposing the flow channel pipe, (2) a cross section with the flow channel tube exposed in the excavated ground A step of placing and curing concrete in a concave shape to form a gate drive, (3) a step of cutting a flow channel pipe in the gate drive and forming a flow path through the gate drive, (4) The door frame is fixed to the gate body, and a process of attaching a water control door to the door frame is performed.

  In this method, since it is necessary to provide a gate body separately from the water control door that functions as a partition wall, the number of work steps increases accordingly. Further, when a water control door that has already been manufactured is moved from the ground to the water, a large area of the water control door receives force from the flowing fluid. As the flow path cross section increases, the area of the water control door increases, and the force received by the flow increases and the weight of the control door also increases. For this reason, when the cross-sectional area of the flow path becomes large, the man-hours and labors need to be further increased in order to move the water control door, and it becomes difficult to improve the work efficiency.

JP-A-9-209339

  An object of the present invention is to reduce the cross-sectional area of the flow path in a flow path in a state where the flow of the fluid is maintained or to close a concrete partition wall closing the flow path even if the flow path cross-sectional area is large. An object of the present invention is to provide a method of manufacturing a concrete partition wall in a flow path that can be efficiently manufactured while reducing labor.

  In order to achieve the above object, a method for producing a concrete partition wall in a flow channel according to the present invention is provided in a flow channel in a state where a fluid is flowing from an upstream side to a downstream side with a gap in the fluid flow direction. A method for producing a partition wall made of concrete in a flow path, in which a partition wall is manufactured by constructing a side mold and an upstream mold, and placing concrete between the molds and curing the concrete, wherein the downstream mold The frame is composed of a frame member and a plate member, and the frame member is fixed in the flow path in a state in which a gap flows from the upstream side to the downstream side, and then a tube body is attached to the frame member. It is fixed and extends in the flow direction, and the fluid flows from the upstream side to the downstream side through the inside of the tube body, and a clearance for the fluid to flow from the upstream side to the downstream side is secured on the outer peripheral side of the tube body. The fixed frame member in a fixed state A gap in which the fluid on the outer peripheral side of the tube is flowed by the plate member while maintaining the state where the fluid is flowed from the upstream side to the downstream side through the inside of the tube body. And constructing the downstream formwork by fixing the baffle member to the framework member, and then downstream of the upstream opening of the tubular body on the upstream side of the constructed downstream formwork The upstream formwork is constructed at the position, and the pipe body is embedded from the upstream side to the downstream side in a concrete partition wall obtained by hardening the concrete.

  According to the present invention, when the downstream formwork is constructed, a gap in which the fluid flows from the upstream side to the downstream side is ensured, so that an increase in the flow rate due to the reduction of the channel cross-sectional area can be suppressed. Moreover, the force which a framework member, a dam member, and a pipe body receive by a flow can be suppressed. For this reason, it is possible to reduce the labor of diving workers who work underwater.

  After the downstream formwork is constructed, the fluid flows from the upstream side to the downstream side through the tube. Thereby, the range from the downstream mold form to the upstream opening of the tube body is in a state where the fluid is stagnated and is not easily affected by the fluid. Since the upstream formwork is constructed in this range, the work can be performed without excessive labor.

  The concrete placed between the downstream formwork and the upstream formwork is hardened to complete a partition wall that penetrates the pipe body from the upstream side to the downstream side. Thus, since the concrete is cast on site to manufacture the partition wall, the partition wall matching the size and shape of the channel can be manufactured even for a channel having a large channel cross-sectional area.

  For example, in the state in which a clearance for the fluid to flow from the upstream side to the downstream side is secured on the outer peripheral side of the tubular body, the dam is positioned at a predetermined position on the upstream side of the fixed frame member and downstream of the upstream opening of the tubular body. The plate member is temporarily arranged by the temporary portion, and then the temporary arrangement of the plate member by the temporary portion is released, and the plate member is moved downstream to be arranged at the position of the skeleton member. In this case, the work of temporarily arranging the slat plate member is performed in a state in which a gap through which the fluid on the outer peripheral side of the tubular body flows is secured, so that the force received by the slat plate member due to the flow can be suppressed. Further, since the dam plate member whose provisional arrangement has been released can be moved to the downstream side in the fluid flow and arranged at the position of the skeleton member, it is advantageous in reducing labor.

  For example, the downstream mold is provided with a plurality of the plate members. With this configuration, it is possible to carry in the board member even when the route for carrying the member into the flow path from the ground is narrow. Moreover, the force which each dam member receives by a flow can be made small.

  For example, the downstream mold can be configured to include the dam member formed in a single spiral shape. If it is set as this structure, since the operation | work which cancels | releases temporary arrangement | positioning and temporary arrangement | positioning should just be performed with respect to one piece of board member, an operation man-hour can be reduced.

  For example, when the downstream mold is provided with a plurality of the plate members, and the clearance is secured on the outer peripheral side of the tube, the fluid flows from the upstream side to the downstream side. It is also possible to make a state in which one surface of each of the resulting plate members is opposed to the outer peripheral surface of the tubular body. In this case, since the cross section with respect to the flow path of the dam member attached to the tubular body becomes smaller, the change in the flow of the flow path due to the influence of the dam member becomes smaller. Therefore, it contributes to lightening of underwater work.

  For example, when the downstream mold is provided with a plurality of the plate members, and the clearance is secured on the outer peripheral side of the tube, the fluid flows from the upstream side to the downstream side. Then, the plate members which are movable in the circumferential direction around the tube body are overlapped with each other in a direction crossing the flow path. Also in this case, since the cross section with respect to the flow path of the dam member attached to the tubular body becomes smaller, the change in the flow of the flow path due to the influence of the dam member becomes smaller. Therefore, it contributes to lightening of underwater work.

  The area of the frame member in the cross-sectional view of the flow path is, for example, 30% or less of the cross-sectional area of the flow path. Thereby, the state in which the fluid in a flow path flows smoothly between frame members can be ensured. Along with this, an increase in flow velocity can be suppressed, and a reduction in work efficiency can be suppressed.

  It is also possible to close the upstream opening of the tubular body embedded through the concrete partition wall from the upstream side to the downstream side. Thereby, the partition which plugs up a flow path can be constructed.

It is explanatory drawing which illustrates the 1st process in this invention by a longitudinal cross-sectional view. It is explanatory drawing which illustrates the inside of a flow path by A1 arrow view of FIG. It is explanatory drawing which illustrates the 2nd process in this invention by a longitudinal cross-sectional view. It is explanatory drawing which illustrates the inside of a flow path by A2 arrow view of FIG. It is explanatory drawing which illustrates the 3rd process in this invention by a longitudinal cross-sectional view. It is explanatory drawing which illustrates the 4th process in this invention by a longitudinal cross-sectional view. It is explanatory drawing which illustrates the partition manufactured by this invention by the longitudinal cross-sectional view. It is explanatory drawing which illustrates the flow path which block | closed the upstream opening of the tubular body of FIG. 7 by a longitudinal cross-sectional view. It is explanatory drawing which shows the modification of the 2nd process in this invention by a longitudinal cross-sectional view. FIG. 10A illustrates a state in which a gap through which the fluid flows is secured, FIG. 10B illustrates a state in which a part of the gap through which the fluid flows is blocked, and FIG. FIG. 4 is an explanatory diagram illustrating a state in which all gaps through which fluid flows are blocked. FIG. 11 (a) shows a state in which a gap through which fluid flows is secured, FIG. 11 (b) shows a state in which a part of the gap through which fluid flows is closed, FIG. 11 (c). ) Is an explanatory view illustrating a state in which all gaps through which fluid flows are closed.

  Hereinafter, the concrete partition wall manufacturing method (hereinafter referred to as a partition wall manufacturing method) in the flow channel of the present invention is divided into four steps of a first step to a fourth step based on the embodiment shown in FIGS. I will explain. In this embodiment, as shown in FIG. 7, a concrete partition wall 1 (hereinafter referred to as a partition wall 1) having a small channel cross-sectional area is manufactured in a channel C flowing in a state where the fluid F is filled. That is, by manufacturing the partition wall 1, the initial flow path cross-sectional area is reduced to the cross-sectional area of the tube body 6.

The diameter of the initial flow path C is, for example, 1 to 5 m (the flow path cross-sectional area is 0.785 to 19.625 m ² ). The inner diameter of the tube body 6 is, for example, 50 mm to 250 mm (the cross-sectional area is, for example, 0.00196 to 0.049 m ² ), or the cross-sectional area of the tube body 6 is about 0.25% of the channel cross-sectional area of the original channel C. It is. The initial flow velocity in the channel C is, for example, 0.01 to 0.4 m / s.

  The work inside the channel C is basically an underwater work by a diving worker. The flow path C is provided with a carry-in entrance E that connects the ground and the flow path C as a path for carrying in the members constituting the partition wall 1. The material of the channel C is not limited, whether it is made of metal such as a steel pipe or made of concrete.

  In the first step illustrated in FIGS. 1 and 2, the rod-shaped frame member 3 constituting the downstream mold 2 of the partition wall 1 is carried into the channel C through the carry-in entrance E using a land crane or the like. The imported frame member 3 is joined to the inner peripheral surface of the flow path C by welding, bolts, or the like by the work of a submersible worker, and the flow of the fluid F is ensured to ensure a clearance from the upstream side to the downstream side. Fix in the road C. In the second step, which will be described later, since the tube body 6 is fixed to the frame member 3, the frame member 3 is formed with a structure that allows the tube body 6 to be fixed easily as shown in FIG.

  In the present invention, when the downstream mold 2 is constructed in the flow path C in which the fluid F flows, the framework member 3 is fixed in the flow path C in a state in which a gap through which the fluid F flows is secured. An increase in flow velocity due to a reduction in road cross-sectional area can be suppressed. Moreover, since it is the framework member 3, the force received by a flow can be suppressed.

  The area of the frame member 3 fixed in the channel C in the cross-sectional view of the channel C (the total area of all the frame members 3) is desirably 30% or less of the cross-sectional area of the channel C. When the skeleton member 3 is disposed in the flow path C in such a rough state, an increase in the flow velocity can be sufficiently suppressed.

  Next, in the second step illustrated in FIGS. 3 and 4, the pipe body 6 is carried into the flow path C and fixed to the frame member 3 so as to extend in the direction in which the fluid F flows. The fluid F is allowed to flow from the upstream side to the downstream side through the inside of the fixed tube body 6. Further, in a state in which a clearance for the fluid F to flow from the upstream side to the downstream side is ensured on the outer peripheral side of the tube body 6, a predetermined position on the upstream side of the fixed frame member 3 and on the downstream side of the upstream opening 6 a of the tube body 6. In addition, the dam member 4 is temporarily disposed using the temporary portion 7.

  In this embodiment, the gap through which the fluid F flows is ensured by disposing the plurality of dam members 4 from the upstream side to the downstream side. Specifically, a plurality of annular dam members 4 having different diameters are coaxially arranged around the tube body 6. The ring-shaped claw plate member 4 is divided into smaller circular arc-shaped members, loaded into the flow path C, and joined in the flow path C by welding, fittings, or the like. 4 can also be formed.

  In this embodiment, the temporary portion 7 is composed of a rod-like temporary frame 7a and a string-like joining member 7b. The temporary frame 7a is fixed and installed on the inner peripheral surface of the flow path C on the upstream side of the position where the dam member 4 is temporarily arranged. By connecting the temporary frame 7a and the board member 4 via the joining member 7b, the board member 4 is temporarily arranged. As illustrated in FIG. 4, the temporary frame 7 a is preferably formed with a structure that can be fixed in a state where the tubular body 6 is inserted. Further, since the diving worker enters between the skeleton member 3 and the temporary frame 7a and performs the work of fixing the tubular body 6 and the work of temporarily arranging the baffle plate member 4, a path through which the diving worker can pass. The temporary frame 7a may be formed with a structure that secures the above. As the bonding member 7b, a wire, a chain, or the like can be used in addition to the string-like member.

  In the second step, the order in which the members are installed is not particularly limited, but for example, the following work procedure is used. (1) The temporary frame 7a is constructed on the upstream side of the frame member 3 and on the upstream side of the position where the siding plate member 4 is temporarily arranged. (2) The tubular body 6 is inserted through the frame member 3 and the temporary frame 7a and fixed. (3) An arc-shaped member obtained by dividing the ring shaped baffle member 4 is carried between the framework member 3 and the temporary frame 7a, and one end of the connection member 7b is connected to each of the arc-shaped members, and the respective connections are made. The other end of the member 7b is connected to the temporary frame 7a. (4) The adjacent arc-shaped members are joined together by welding to form an annular dam member 4.

  In the present invention, since the pipe body 6 is extended in the flow direction on the frame member 3, the increase in the flow rate due to the installation of the pipe body 6 is extremely small, and the force that the pipe body 6 receives by the flow is also small. Since the slat plate member 4 is also temporarily arranged in a state where a clearance through which the fluid F flows is secured, an increase in the flow velocity can be suppressed, and the force that the slat plate member 4 receives by the flow is also reduced. Thereby, the labor of the submersible worker who performs these work underwater can be reduced. The operation of carrying various members into the flow path C is also facilitated.

  Next, in the third step illustrated in FIG. 5, the temporary arrangement of the weir member 4 by the temporary portion 7 is released, and the weir plate member 4 is moved downstream to be fixed to the frame member 3. The downstream mold 2 is constructed by closing the outer peripheral side of the tube body 6 with the fixed plate member 4. At this time, the state in which the fluid F flows from the upstream side to the downstream side through the inside of the tube body 6 is maintained.

  In this embodiment, by temporarily removing the connecting members 7b connected to the respective plate members 4, the temporary arrangement of the plate members 4 is released. Then, the dam member 4 from which the connecting member 7b has been removed is sequentially moved downstream along the flow and fixed to the skeleton member 3. The downstream mold 2 is constructed by fixing all of the plurality of plate members 4 to the frame member 3 and closing the outer peripheral side of the tube body 6.

  In the present invention, the downstream-side formwork 2 is constructed by fixing the temporarily placed baffle member 4 to the frame member 3 and closing the outer peripheral side of the tubular body 6. At this time, the flow passage cross-sectional area is reduced and the flow velocity is increased. However, since the dam member 4 only needs to be moved downstream along the flow, excessive labor is not required.

  Next, in the fourth step illustrated in FIG. 6, the upstream mold 5 is constructed at a position downstream of the upstream opening 6 a of the tubular body 6 on the upstream side of the constructed downstream mold 2. Similarly to the downstream mold 2, the upstream mold 5 is constructed in a state where the tubular body 6 is penetrated. The partition wall 1 is formed by placing and hardening concrete CR that is hardened even in water in the space on the outer peripheral side of the tubular body 6 between the downstream mold 2 and the upstream mold 5.

  Specifically, when the concrete CR is placed in the space on the outer peripheral side of the tubular body 6 between the downstream mold 2 and the upstream mold 5, the upstream mold 5 and the downstream mold 2 is appropriately provided with holes. A pressure feeding hose is extended between the downstream mold 2 and the upstream mold 5 from the concrete placement facility 8 installed on land. The concrete CR to be placed is supplied from the concrete placement facility 8. When the concrete CR is placed, the water existing in the space described above flows into the downstream side of the downstream formwork 2 and the upstream side of the upstream formwork 5 through the provided holes, and is replaced with the concrete CR. Concrete CR can be filled in a space on the outer peripheral side of the pipe body 6 between 2 and the upstream mold 5. The partition wall 1 formed in this way is in a state in which the pipe body 6 penetrates from the upstream side to the downstream side and is embedded. That is, the cross-sectional area of the partition wall 1 is the opening area of the tube body 6.

  In the present invention, after the downstream mold 2 is constructed, the fluid F flows from the upstream side to the downstream side through the tube 6, so the range from the downstream mold 2 to the upstream opening 6 a of the tube 6 is The fluid F becomes stagnant and hardly affected by the flow velocity. Therefore, it becomes possible to construct the upstream mold 5 in this range without excessive labor. Next, the concrete CR placed between the downstream mold 2 and the upstream mold 5 is cured, so that the partition wall 1 in which the tubular body 6 penetrates from the upstream side to the downstream side is completed. Therefore, the partition wall 1 can be manufactured efficiently while reducing the labor of diving workers. Moreover, since the partition wall 1 is manufactured by placing concrete CR on site, the present invention can also be applied to the channel C having a large channel cross-sectional area. Moreover, the partition 1 matched with the shape can be manufactured also about the flow path C of various cross-sectional shapes.

  In this embodiment, since the downstream mold 2 is configured to include a plurality of slat plate members 4, the slat plate member 4 can be carried in even when the route for carrying the member from the ground into the channel C is narrow. Moreover, the force which the plate member 4 receives by a flow can be made small. In addition, although the board member 4 of this embodiment is formed in the annular | circular shape, it can be comprised by various shapes, such as square shape and a fan shape.

  When using a plurality of plate members 4 as in this embodiment, when the plate members 4 are formed so as to provide a range in which adjacent plate members 4 overlap when fixed to the frame member 3. It is possible to construct the downstream mold 2 having a high hermeticity. Further, when work such as welding is required when fixing the spar member 4 to the skeleton member 3, all the slat members 4 are moved to the skeleton member 3 to block the outer peripheral side of the tube body 6. After that, work such as welding should be performed. When the outer peripheral side of the tubular body 6 is closed by the dam member 4, the range from the downstream mold 2 to the upstream opening 6a of the tubular body 6 is in a state where the fluid F is stagnated and is affected by the flow velocity. It becomes difficult. Therefore, it becomes easy to work without excessive labor.

  In this embodiment, when constructing the upstream mold 5, the temporary frame 7 a can be used as a skeleton member constituting the upstream mold 5. When the strength of the temporary frame 7a is insufficient, a framework is added to increase the strength. The structures of the frame member 3 and the temporary frame 7a are not limited to the structures shown in FIGS. 2 and 4, and other structures such as a truss structure may be employed. After casting concrete, the downstream mold 2 and the upstream mold 5 can be removed from the flow path C, or at least one of them can be left behind.

  As shown in FIG. 8, by closing the upstream opening 6 a of the tube body 6, the partition wall 1 that closes the flow path C can be formed. In this embodiment, the upstream opening 6a is closed by covering the upstream opening 6a with the lid 9 and joining them. If the lid 9 is detachable from the upstream opening 6a, the closed channel C can be opened when desired. By closing the upstream opening 6a, the flow of the fluid F on the downstream side of the downstream mold 2 is also stagnated. Therefore, by placing and hardening the concrete CR from the downstream opening 6b, The interior can be filled with concrete.

  In this embodiment, one tubular body 6 is passed through the partition wall 1, but a configuration in which a plurality of tubular bodies 6 are inserted can also be used. At this time, not only the tube 6 having the same inner diameter but also the tube 6 having a different inner diameter can be provided. If a plurality of tube bodies 6 having different inner diameters are provided and the lid body 9 is detachable from the upstream opening 6a, the channel C can be easily changed to a desired channel cross-sectional area when desired. The tube body 6 is not limited to a circular cross section, and may be a polygonal cross section or the like.

  The 2nd process in the manufacturing method of a partition can also be made to illustrate in FIG. In this embodiment, a single plate member 4 formed in a spiral shape is used. Then, the spiral central axis direction of the weir plate member 4 is extended in the direction of the flow of the fluid F so that the weir plate member 4 is in a position to close the outer peripheral side range of the tubular body 6 of the flow path C in a cross-sectional view of the flow path C. Temporary placement is provided by the temporary unit 7.

  Furthermore, the extension pipe 10 is connected to the upstream opening 6a of the pipe body 6 and the pipe body 6 is extended to the upstream side, so that the position of the opening into which the fluid F flows is more upstream than the position where the partition wall 1 is manufactured. Moved to position. The opening on the upstream side of the extension pipe 10 is provided with an expansion member 11 that increases the opening area. In order to stably fix the extension pipe 10 to the flow path C, a support member 12 that connects the extension pipe 10 and the inner peripheral surface of the flow path C is provided. The position of the opening into which the fluid F flows (the opening of the expansion member 11) is located upstream of the carry-in entrance E, and a fence 13 is provided between the opening and the carry-in entrance E.

  In this embodiment, since the temporary placement and the work for releasing the temporary placement may be performed on one piece of the plate member 4, the number of work steps can be reduced. In addition, since the opening into which the fluid F flows in the tube body 6 is located on the upstream side, even when the flow rate of the fluid F flowing into the tube body 6 increases due to a decrease in the cross-sectional area of the flow path, The stagnant range that is not easily affected by the flow velocity is widened. In connection with this, diving work can be made lighter. By providing the expansion member 11, the fluid F flowing into the tube body 6 can be further guided, which is advantageous for suppressing an increase in the flow velocity of the fluid F in a range where the diving operation is performed. By providing the fence 13, it is possible to prevent a diving worker or member from approaching the opening.

  The second step and the third step in the method for manufacturing the partition wall can be exemplified in FIG.

  As shown in FIG. 10 (c), the plate member 4 of this embodiment has an annular plate member 4a through which the tubular body 6 penetrates, and one end of the plate member 4a is connected to the plate member 4a and shifted in the circumferential direction. It is comprised by the some board member 4b, 4c arrange | positioned. The plate members 4b and 4c are substantially trapezoidal plate members (outer circumferential edges are circular arcs) obtained by radially dividing the gap between the plate member 4a and the inner peripheral surface of the flow path C in a cross-sectional view. . The plate members 4b and 4c are alternately arranged in the circumferential direction.

  The weir plate members 4b and 4c can be folded with respect to the weir plate member 4a starting from one end of each.

  In the second step, the respective plate members 4b and 4c are folded with respect to the plate member 4a, and as illustrated in FIG. In a state of being opposed to the outer peripheral surface of the tube member 6, it is temporarily arranged at a predetermined position on the upstream side of the frame member 3 and on the downstream side of the upstream opening 6 a of the tube body 6.

  More specifically, the other slat plate member 4b is folded so that the other end portion (outer peripheral edge) is on the downstream side of the flow path C with respect to the slat plate member 4a, and then the other slat plate member 4c is folded in the same manner. The weir plate members 4a, 4b and 4c are temporarily arranged so that the weir plate member 4b and the weir plate member 4c overlap.

  Next, in the third step, the plate members 4 a, 4 b, 4 c are moved to the downstream side and arranged at the position of the skeleton member 3. Next, the dam member 4b that has been folded and closed with respect to the dam member 4a is opened as illustrated in FIG. 10B.

  When the weir plate member 4b is completely opened, the weir plate member 4c is also completely opened, and as shown in FIG. 10C, the outer peripheral surface of the tubular body 6 and the flow path C are formed by the weir plate members 4a, 4b, and 4c. The gap with the inner peripheral surface of is closed. In this state, the plate members 4a, 4b, and 4c are fixed to the frame member 3. The downstream mold 2 is constructed by closing the outer peripheral side of the tubular body 6 with the fixed plate members 4a, 4b, and 4c.

  In this embodiment, when the gap where the fluid F flows from the upstream side to the downstream side is secured on the outer peripheral side of the tube body 6, one of the respective plate members 4 b and 4 c attached to the tube body 6. The surface is made to face the outer peripheral surface of the tubular body. Thereby, since the cross section with respect to the flow path C of the plate members 4a, 4b, and 4c attached to the pipe body 6 becomes small, the change in the flow of the flow path C due to the influence of the cross plate members 4a, 4b, and 4c becomes small. . Therefore, it contributes to lightening of underwater work.

  In the third step, the flow passage cross-sectional area decreases and the flow velocity increases as the crest members 4b and 4c open, but the crest members 4a, 4b and 4c are pushed downstream along the flow of the fluid F. So that it does not require excessive effort.

  In this embodiment, a total of 16 plate members 4b and 4c are used, but other numbers may be used. For example, the weir plate member 4a can be formed in a 32 square shape in a cross-sectional view, and the weir plate members 4b and 4c can be constituted by a total of 32 members.

  The second step and the third step can be exemplified in FIG.

  As shown in FIG. 11 (c), the plate member 4 of this embodiment is attached to the ring-shaped plate member 4 h through which the tubular body 6 penetrates and one end of the plate member 4 h so as to be movable in the circumferential direction. It is comprised by the some board member 4d-4g. The plate members 4d, 4e, 4f, and 4g are substantially fan-shaped plate-like members in which the gap between the outer peripheral surface of the plate member 4h and the inner peripheral surface of the flow path C is divided into four.

  In the second step, as shown in FIG. 11 (a), the respective plate members 4d, 4e, 4f, and 4g are overlapped with each other in the direction crossing the flow path C, and the frame members 3 are positioned. Deploy.

  Next, in the third step, the respective plate members 4e, 4f, and 4g are moved in the circumferential direction around the tube body 6 as illustrated in FIG. 11B and illustrated in FIG. 11C. In this way, the outer peripheral side of the tube body 6 is closed, and the plate members 4d, 4e, 4f, 4g, and 4h are fixed to the frame member 3. At this time, the dam members 4d to 4g adjacent in the circumferential direction partially overlap in the circumferential direction. The downstream mold 2 is constructed by closing the outer peripheral side of the tubular body 6 with the fixed plate members 4d, 4e, 4f, 4g, and 4h.

  In this embodiment, when the clearance which the fluid F flows on the outer peripheral side of the tubular body 6 from the upstream side to the downstream side is ensured, the circumferential direction around the tubular body 6 is attached to the tubular body 6. These swayable plate members 4 are placed in a state of being stacked on each other in a direction crossing the flow path C. Thereby, since the cross section with respect to the flow path C of the dam member 4 attached to the pipe body 6 becomes small, the change of the flow of the flow path C by the influence of the dam member 4 becomes small. Therefore, it contributes to lightening of underwater work. Moreover, since the board member 4 can be made compact, the board member 4 can be carried in even when the carrying-in route E is narrow when carrying the member into the channel C from the ground.

  In this embodiment, the gap between the outer peripheral surface of the plate member 4h and the inner peripheral surface of the flow path C is divided into four parts. The gap between the surfaces can be divided into four or more, or can be divided into two or three.

DESCRIPTION OF SYMBOLS 1 Concrete partition wall 2 Downstream side formwork 3 Frame member 4, 4a-4h Cut plate member 5 Upstream side formwork 6 Tubular body 6a Upstream side opening 6a Downstream side opening 7 Temporary part 7a Temporary frame 7b Joining member 8 Concrete placement equipment 9 Lid 10 Extension tube 11 Expansion portion 12 Support member
13 Fence C Channel E E Inlet F Fluid CR Concrete

Claims (8)

In the flow path in the state where the fluid flows from the upstream side to the downstream side, a downstream formwork and an upstream formwork are constructed at intervals in the fluid flow direction, and concrete is placed between these formwork. It is a method for manufacturing a concrete partition wall in a flow path for manufacturing a partition wall by setting and curing,
The downstream mold is composed of a skeleton member and a slab member, and the skeleton member is fixed in the flow path in a state in which a gap flows from the upstream side to the downstream side, and then the skeleton member The pipe is fixed in the flow direction, the fluid flows from the upstream side to the downstream side through the inside of the pipe body, and the fluid flows from the upstream side to the downstream side on the outer peripheral side of the pipe body. The squeeze plate member is disposed while the squeeze plate member is disposed at the position of the fixed frame member in a state where a flow gap is secured, and then the state in which the fluid flows from the upstream side to the downstream side through the inside of the tubular body is maintained. The downstream formwork is constructed by closing the gap through which the fluid on the outer peripheral side of the tubular body flows, and fixing the plate member to the frame member, and then upstream of the constructed downstream formwork On the tube on the side The flow path is characterized in that the upstream formwork is constructed at a position downstream of the side opening, and the pipe is penetrated from the upstream side to the downstream side in a concrete partition wall obtained by hardening the concrete. Manufacturing method for concrete partition walls.   In the state where the fluid flows from the upstream side to the downstream side on the outer peripheral side of the tubular body, the dam plate is located at a predetermined position on the upstream side of the fixed frame member and downstream of the upstream opening of the tubular body. The member is temporarily arranged by a temporary part, and then the temporary arrangement of the board member by the temporary part is released, and the board member is moved downstream to be arranged at the position of the frame member. Method for manufacturing concrete partition walls in the flow path of   The downstream mold is provided with a plurality of the slat plate members, and these squeeze members are temporarily arranged by the temporary portion at positions where the outer peripheral side range of the tubular body of the flow channel is closed in a cross-sectional view of the flow channel. The manufacturing method of the partition wall made from concrete in the flow path of Claim 2 to do.   The downstream formwork is provided with a piece of the plate member formed in a spiral shape, and the plate member is extended in the direction of the flow of the fluid in the direction of the spiral central axis, and the plate member is moved to the flow direction. The method for producing a concrete partition wall in a flow path according to claim 2, wherein the temporary partitioning portion is temporarily arranged at a position that closes an outer peripheral side range of the tubular body of the flow path in a cross-sectional view of the path.   The downstream mold is provided with a plurality of the baffle members, and is attached to the pipe body in a state in which a gap flows from the upstream side to the downstream side on the outer peripheral side of the pipe body. The method for producing a concrete partition wall in a flow path according to claim 1 or 2, wherein one surface of each of the dam members is opposed to the outer peripheral surface of the tubular body.   The downstream mold is provided with a plurality of the baffle members, and is attached to the pipe body in a state in which a gap flows from the upstream side to the downstream side on the outer peripheral side of the pipe body. 3. The concrete partition walls in the flow path according to claim 1, wherein the plate members movable in the circumferential direction around the tubular body are overlapped with each other in a direction transverse to the flow path. Production method.   The area in the cross-sectional view of the flow path of the frame member fixed in the flow path is 30% or less of the cross-sectional area of the flow path. A method for producing a concrete partition wall.   The manufacturing method of the concrete partition in the flow path in any one of Claims 1-7 which plugs the upstream opening of the said tubular body embed | buried by penetrating the said concrete partition from the upstream to the downstream.

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