Embankment construction method and embankment construction system

Abstract

To reduce noise during construction of an embankment.SOLUTION: An embankment construction method comprises a step of installing a formwork 10, a step of placing an embankment material at a placement location within a region partitioned by the formwork 10, and a step of moving a soundproof wall 40, which is movably supported by the formwork 10, along the formwork 10 toward the placement location.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a bank construction method and a bank construction system. [Background technology]

[0002] Patent Document 1 discloses a method for forming a slope shoulder and constructing a levee body using formwork, in which the formwork is installed in a predetermined position and then levee body materials are poured into the area defined by the formwork. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-297817 Summary of the Invention [Problem to be solved by the invention]

[0004] As described in Patent Document 1, embankments are constructed gradually by construction machinery such as bulldozers and vibratory rollers, and transport vehicles such as dump trucks, working in the area where the embankment materials are poured. However, because embankments such as reservoir dams and sabo dams are constructed in relatively quiet areas such as mountainous regions, the noise generated by construction machinery when constructing the embankment spreads not only to the surrounding area but also to distant locations, becoming harsh to the ears and potentially damaging the atmosphere of the mountainous region.

[0005] An object of the present invention is to reduce noise generated when constructing a bank body. [Means for solving the problem]

[0006] The present invention is a method for constructing a levee using formwork, and includes the steps of installing the formwork, pouring levee material into a pouring location within an area defined by the formwork, and moving a soundproof wall, which is movably supported by the formwork, along the formwork to the pouring location.

[0007] The present invention also provides a levee construction system for constructing a levee by pouring levee material, comprising a formwork for partitioning an area for pouring the levee material, a soundproof wall supported by the formwork so as to be freely movable, and a work machine used to construct the levee. [Effects of the Invention]

[0008] According to the present invention, it is possible to reduce noise generated when constructing a bank body. [Brief explanation of the drawings]

[0009] [Figure 1] A longitudinal cross-section of the dam. [Figure 2] This is a front view of the dam from the upstream side. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 1 is a plan view of the working area seen from above. [Figure 6] FIG. 10 is a diagram for explaining work performed in a work area. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a method and system for constructing a dam body according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a dam body constructed using a formwork 10 (described later) will be described as a dam 1.

[0011] First, the dam 1 will be described with reference to Figures 1 and 2. Figure 1 is a vertical cross-sectional view of the dam 1, and Figure 2 is a front view of the dam 1 as seen from the upstream side (as seen from the left side in Figure 1).

[0012] As shown in Fig. 1, dam 1 is a trapezoidal dam with a trapezoidal cross section. As shown in Fig. 2, the left and right sides of dam 1 are anchored to bedrock 2, 3. For ease of explanation, the left-right direction shown in Fig. 1, i.e., the direction of the river flow, will be referred to as the upstream-downstream direction of dam 1, and the left-right direction shown in Fig. 2, i.e., the direction of the river width, will be referred to as the width direction of dam 1.

[0013] The dam 1 according to this embodiment is constructed using the CSG (Cemented Sand and Gravel) method by covering the surface of a trapezoidally piled CSG (dam main body) with protective concrete (protective portion). The materials used for the dam main body and protective portion that make up the dam 1 as a concrete structure are collectively referred to as concrete materials. The CSG material (embankment material) that is the material for the dam main body is produced by mixing locally generated materials collected near the dam site with water and cement.

[0014] The dam 1 is constructed by pouring concrete materials to stack concrete layers (CSG layer and protective concrete layer) from bottom to top. The height h of one concrete layer is approximately 75 cm to 100 cm.

[0015] 1 and 2 show a dam 1 made up of six concrete layers for simplicity. The upper concrete layers are formed so that their lengths in the upstream and downstream directions are shorter. Therefore, staircase-like steps are formed on the upstream and downstream sides of the dam 1. The first layer L1 has a wall portion L1a formed at its end and a flat portion L1b formed on its top surface, while the second layer L2 has a wall portion L2a formed at its end and a flat portion L2b formed on its top surface. The flat portion L1b of the first layer L1 and the wall portion L2a of the second layer L2 form the first step 5a, and the flat portion L2b of the second layer L2 and the wall portion L3a of the third layer L3 form the second step 5b. Similarly, the third to fifth steps 5c, 5d, and 5e are formed on the upstream and downstream sides of the dam 1.

[0016] Next, with reference to Figures 3 and 4, a soundproofing device 100 used when constructing a dam 1 having steps 5a to 5e formed on its upstream and downstream side surfaces will be described. Figure 3 is a side view of the soundproofing device 100 (a view of the soundproofing device 100 seen from a direction along the width direction of the dam 1), and Figure 4 is a front view of the soundproofing device 100 (a view of the soundproofing device 100 seen from a direction along the upstream and downstream direction of the dam 1). Figures 3 and 4 show the soundproofing device 100 installed on steps formed on the side surface of the dam 1. In the following description, the right side of Figure 4 will be referred to as the front of the soundproofing device 100, and the left side of Figure 4 will be referred to as the rear of the soundproofing device 100.

[0017] The soundproofing device 100 is a device for moving a soundproof wall 40 along a formwork 10 (see Figure 3) used when pouring embankment material, and is equipped with a soundproofing wall 40 having sound-insulating properties, a frame 20 to which the soundproofing wall 40 is fixed, and a traveling device 30 (moving mechanism) that moves the soundproofing wall 40 together with the frame 20.

[0018] As shown in Fig. 3, the formwork 10 has a pair of parallel vertical plates 10a, 10b and a pair of parallel horizontal plates 10c, 10d. The horizontal plates 10c, 10d are formed between the pair of vertical plates 10a, 10b. The formwork 10 is formed, for example, by stacking a pair of H-shaped steel beams one above the other and fastening or welding them together.

[0019] Of the pair of vertical plates 10a, 10b of the formwork 10, the first vertical plate 10b, located toward the center of the dam 1, serves as the face plate with which the dam body material comes into contact when poured. The second vertical plate 10a, which faces the first vertical plate 10b, is connected to the first vertical plate 10b via a pair of horizontal plates 10c, 10d. Therefore, the formwork 10 stands on its own, with the pair of vertical plates 10a, 10b as legs, and the first vertical plate 10b, which comes into contact with the dam body material during pouring, standing upright. In other words, the pair of horizontal plates 10c, 10d and the second vertical plate 10a function as supports for the first vertical plate 10b, allowing it to stand upright. Therefore, when the formwork 10 is placed on a substantially horizontal surface, the first vertical plate 10b stands upright naturally without the need for a separate support member for the first vertical plate 10b.

[0020] A plurality of formworks 10 are installed by a lifting device (not shown) in a predetermined installation direction, specifically, along the width direction of the dam 1, as shown in Fig. 5A described later. In order to define an area where the levee body material is poured, the formworks 10 are installed opposite each other in the upstream and downstream directions of the dam 1, sandwiching the area (see Fig. 5A).

[0021] 3 shows that the formwork 10, which was in contact with the wall portion L1a of the first layer L1 when the first layer L1 was poured, has been moved to the top surface (flat portion L3b) of the third layer L3 by a lifting device (not shown). The area defined by the formwork 10 placed on the top surface of the third layer L3 is the area where the fourth layer L4 will be poured.

[0022] The frame 20 has a pair of first support columns 21 (21a, 21b) that are erected in the vertical direction and parallel to each other, and a pair of second support columns 22 (22a, 22b) that are erected in the vertical direction and parallel to each other. The distance between the pair of first support columns 21a, 21b is the same as the distance between the pair of second support columns 22a, 22b. The distance between the first support column 21a and the second support column 22a is also the same as the distance between the first support column 21b and the second support column 22b. The second support column 22 is shorter in length than the first support column 21.

[0023] The pair of first pillars 21a, 21b are connected by a first beam member 23 (see FIG. 4) that is provided horizontally across both pillars.

[0024] The first support column 21a and the second support column 22a are connected by a first frame member 24 (see FIG. 3) that is installed horizontally across both columns. The first frame member 24 is installed between the middle of the first support column 21a and the lower end of the second support column 22a. A brace 25 is installed between the first support column 21a and the first frame member 24. Similarly, the first support column 21b and the second support column 22b are connected by a frame member (not shown) that is installed horizontally across both columns, and a brace member (not shown) is installed between the first support column 21b and that frame member.

[0025] A second frame member 26a is horizontally suspended between the upper end of the first support column 21a and the upper end of the second support column 22a, and a second frame member 26b is horizontally suspended between the upper end of the first support column 21b and the upper end of the second support column 22b. In addition, a pair of second beam members 27 is suspended between the second frame members 26a and the second frame members 26b.

[0026] The first support column 21, the second support column 22, the first beam member 23, the first frame member 24, the diagonal bracing member 25, the second frame members 26a and 26b, and the second beam member 27 that make up the frame 20 are mainly formed of H-shaped steel. Note that the members that make up the frame 20 may also be formed of square steel pipe material, for example.

[0027] The traveling device 30 has a first traveling device 30 a provided at the lower end of the first support pole 21 and a second traveling device 30 b provided at the lower end of the second support pole 22 .

[0028] The first running device 30a has a running frame 31 that is arranged between the first support pillars 21a and 21b and supports the first support pillars 21a and 21b, a pair of wheels 32 (32a and 32b) that are rotatably supported on the running frame 31, an electric motor 34 that drives the wheel 32a that is positioned on the front side of the soundproofing device 100, and a connecting member 35 that connects the lower ends of the first support pillars 21a and 21b to the running frame 31.

[0029] Similarly, the second running device 30b has a running frame 31 that is arranged between the second support pillars 22a and 22b and supports the second support pillars 22a and 22b, a pair of wheels 32 (32a and 32b) that are rotatably supported on the running frame 31, an electric motor 34 that drives the wheel 32a that is positioned on the front side of the soundproofing device 100, and a connecting member 35 that connects the lower ends of the second support pillars 22a and 22b to the running frame 31.

[0030] As shown in FIG. 3, the wheels 32 of the second traveling device 30b are disposed in a recess 10e formed by the vertical plates 10a and 10b of the formwork 10 and the first horizontal plate 10c, which is the upper of the pair of horizontal plates 10c and 10d. The second traveling device 30b travels on the first horizontal plate 10c while being guided by the pair of vertical plates 10a and 10b. In other words, the bottom surface of the recess 10e provided in the upper part of the formwork 10, i.e., the upper surface of the first horizontal plate 10c, serves as the traveling surface for the second traveling device 30b. Note that the portion guiding the traveling device 30 (movement mechanism) is not limited to the recess 10e described above, and may be any structure formed in the formwork 10 that can guide the wheels 32 of the traveling device 30. For example, it may be a groove formed along the longitudinal direction of the formwork 10, separate from the recess 10e.

[0031] When the electric motor 34 is driven, the wheels 32a are rotated and the traveling device 30 travels. The electric motors 34 of the first traveling device 30a and the second traveling device 30b operate in synchronization. As a result, the entire soundproofing device 100, including the soundproofing wall 40, moves along the formwork 10.

[0032] In this way, the soundproofing device 100 utilizes the formwork 10 used when pouring the embankment material and is equipped with a traveling device 30 (moving mechanism) that can move the soundproof wall 40 along the formwork 10. In other words, at least a portion of the load of the soundproof wall 40 in the vertical direction acts on the formwork 10 via the traveling device 30 (moving mechanism), and the soundproof wall 40 is supported by the formwork 10. Furthermore, as described above, the formwork 10 is provided with vertical plates 10a, 10b that serve as guides for the traveling device 30 (moving mechanism) and the bottom surface of the recess 10e that serves as a running surface along which the traveling device 30 (moving mechanism) runs. Therefore, the soundproofing wall 40 is movably supported by the formwork 10 via the traveling device 30.

[0033] The soundproof wall 40 is, for example, a plate-shaped sound-insulating panel provided with sound-absorbing material that attenuates noise by converting vibration energy into thermal energy. Note that the soundproof wall 40 is not limited to a plate-shaped member, and may be a sound-insulating member of any shape and structure that can be attached to the frame 20, and may be a member with some thickness. In addition, it is preferable that the soundproof wall 40 has a structure at its upper end that prevents sound from leaking out.

[0034] The soundproof wall 40 is fixed to the frame 20 via a bracket (not shown) with its planar portion approximately parallel to the formwork 10 and aligned vertically, and the lower end of the soundproof wall 40 is supported by the running frame 31 of the above-mentioned second running device 30b or a bracket attached to the running frame 31.

[0035] The height of the soundproof wall 40 is set to 4 to 6 m, preferably about 5 m, and the length of the soundproof wall 40 in the front-to-back direction of the soundproofing device 100 is set to 5 to 15 m, preferably about 10 m. The soundproof wall 40 may be constructed by arranging a plurality of panels of a predetermined size in the front-to-back direction or the up-to-down direction of the soundproofing device 100. The range in which the soundproof wall 40 is provided can be set to about several tens of meters to 100 meters by arranging a plurality of soundproofing devices 100 side by side.

[0036] Next, with reference to Figures 5 and 6, the work carried out within the area defined by formwork 10, i.e., the work carried out to construct dam 1, will be described. Figure 5 is a plan view of the area defined by formwork 10 as seen from the direction indicated by arrow A in Figure 3, i.e., a plan view as seen from above, and shows the order in which work to form one layer that makes up dam 1 proceeds. Figure 6 also shows an example of work carried out in the work area shown in Figure 5.

[0037] In the dam 1, which is constructed by stacking concrete layers from bottom to top as shown in Figures 1 and 2, each layer is formed mainly by spreading CSG material (embankment material) transported by a dump truck 7 (transportation machine) to a predetermined thickness (25 cm spreading thickness) using a bulldozer 8 (leveling machine) as shown in Figure 6(a), and then compacting the CSG material via the surface of the CSG material by rolling it back and forth a predetermined number of times (three times) using a vibrating roller 9 (compaction machine) as shown in Figure 6(b).

[0038] The CSG material is placed after leveling work by a bulldozer 8 and compaction work by a vibrating roller 9. That is, to construct a bank body such as a dam 1, work machines such as a bulldozer 8 and a vibrating roller 9 are used.

[0039] Furthermore, as shown in Figure 5(a), for example, each layer is formed over a wide range from one rock mass 2 to the other rock mass 3. For this reason, a CSG supply device equipped with a CSG material transport mechanism such as a distributor is installed on one rock mass 2, and the leveling and compaction work is carried out using the CSG material supplied from the CSG supply device, starting from the work area on the other rock mass 3, which is farthest from the CSG supply device.

[0040] Specifically, the area defined by the plurality of formwork 10 installed along the width direction of the dam 1 is divided into a plurality of work areas along the width direction of the dam 1. In the example shown in Fig. 5(a), the area enclosed by the formwork 10 is divided into seven areas. Note that Fig. 5 does not show formwork 10 that was installed to define layers where the pouring of CSG material has already been completed, such as the formwork 10 in contact with the wall portion L2a of the second layer L2 and the formwork 10 in contact with the wall portion L3a of the third layer L in Fig. 3.

[0041] The pouring process of pouring CSG material (dam body material) is carried out after the formwork installation process of installing formwork 10 along a predetermined installation direction (width direction of dam 1) is completed.In the pouring process, first, the CSG material supplied from the CSG supply device is transported by dump truck 7 to the unworked area where bulldozer 8 is waiting.

[0042] When the CSG material transported by the dump truck 7 is unloaded at a predetermined position in the unworked area, leveling work is started by the bulldozer 8, and the unworked area becomes a leveling work area.

[0043] Then, when the leveling work is completed in the leveling work area, the bulldozer 8 moves to the unworked area on one side of the rock mass 2 and waits in the unworked area until the CSG material is transported by the dump truck 7.

[0044] On the other hand, when the leveling work by the bulldozer 8 is completed and it is confirmed that the bulldozer 8 has left the leveling work area, the vibratory roller 9 enters the work area and starts compaction work. As a result, the leveling work area becomes a compaction work area.

[0045] Furthermore, even if the compaction work is completed, the vibrating roller 9 will not enter the work area on one side of the rock 2 until the leveling work in that work area is completed, but will wait in the work area where the compaction work has been completed.

[0046] In this way, each layer constituting the dam 1 is formed by successively carrying out leveling work toward one side of the rock mass 2 where the CSG supply device is installed, and then carrying out compaction work in the work area where the leveling work is completed, as shown in the order of (a), (b), and (c) in Figure 5. In other words, the placement locations where the CSG material is placed change sequentially in the direction in which the formwork 10 is installed, i.e., along the width direction of the dam 1.

[0047] Since the leveling and compaction work in each work area is performed after the previous work is completed, for example, bulldozers 8 and vibratory rollers 9 do not coexist in the same work area. For this reason, work machines such as bulldozers 8 and vibratory rollers 9 and transport machines such as dump trucks 7 can be operated automatically, making it possible to form each layer 24 hours a day. In automatic operation, the work area is divided into leveling work areas and compaction work areas as described above to prevent bulldozers 8 and vibratory rollers 9 from coexisting in one work area. However, in normal manned work (manual operation), bulldozers 8 and vibratory rollers 9 coexist in one work area, and in this case too, the work area moves sequentially toward one side of the rock mass 2 where the CSG supply device is installed.

[0048] Here, since dams 1 are generally constructed in relatively quiet areas such as mountainous regions, the noise generated by work machinery such as bulldozers 8 when constructing dam 1 spreads not only to the surrounding area but also to distant places, becoming harsh to the ears and potentially spoiling the atmosphere of the mountainous region.

[0049] In particular, if construction work on Dam 1 is carried out on a 24-hour basis, there is a risk that the area recognized as noise at night will become wider.

[0050] In order to suppress the spread of work noise generated by work machines such as bulldozers 8, it is conceivable to install soundproofing materials such as soundproofing panels to cover the entire work area, but as mentioned above, the work area covers a wide area from one bedrock 2 to the other bedrock 3, and the elevation of the work area changes sequentially when forming the lower layer and when forming the upper layer, so it is not realistic to install soundproofing materials to cover the entire work area.

[0051] Therefore, in the embankment construction method according to this embodiment, the above-mentioned soundproofing device 100, which can be moved using the formwork 10 used when pouring the embankment material, is used to move the soundproof wall 40 to match the pouring location, thereby suppressing the spread of noise generated by work machines such as bulldozers 8 and vibratory rollers 9 working at the pouring location to the surrounding area.

[0052] Specifically, as shown in (a) of Figure 5, the soundproofing devices 100 are arranged opposite each other so as to sandwich the leveling work area and the compaction work area, which are the concrete pouring locations, in the upstream and downstream directions of the dam 1. Note that when the work machine is operated manually and the leveling work area and the compaction work area are not particularly separated, the soundproofing devices 100 are arranged opposite each other so as to sandwich the concrete pouring location where the leveling work and compaction work are performed in the upstream and downstream directions of the dam 1. In Figure 5, other parts of the soundproofing device 100, such as the frame 20, are shown with dashed lines to make the position of the soundproof wall 40 easier to understand. In the example shown in Figure 5, three soundproofing devices 100 are arranged along the installation direction of the formwork 10.

[0053] 3 and 4, the soundproofing walls 40 provided in the soundproofing device 100 are installed so that their flat surfaces face the area partitioned by the formwork 10, and therefore noise generated in the space sandwiched between the soundproofing walls 40 in the upstream and downstream directions of the dam 1 is attenuated by the soundproofing walls 40. The soundproofing device 100 viewed in cross section along line BB in FIG. 5 is in the state shown in FIG.

[0054] The area in which the soundproofing devices 100 are installed is set to be sufficiently wider than the area including the leveling work area and compaction work area where concrete will be poured, and specifically, multiple soundproofing devices 100 are lined up from the unworked area adjacent to the leveling work area to the completed work area so that the area in which the soundproofing walls 40 are installed includes part of the unworked area adjacent to the leveling work area and part of the completed work area adjacent to the compaction work area. The specific area in which the soundproofing walls 40 are installed varies depending on the size of the dam 1, but is a range of several tens of meters to about 100 meters in the width direction of the dam 1.

[0055] 5(b) and 5(c), when the leveling work area and compaction work area to be the pouring location change, the soundproofing device 100 drives the electric motor 34 of the traveling device 30 to rotate the wheels 32a, and moves along the formwork 10 toward the area to be the new pouring location. Then, the soundproofing device 100, which has moved in the direction shown in 5(b) and 5(c), stops with the flat surface of the soundproofing wall 40 facing the leveling work area and compaction work area to be the new pouring location.

[0056] In this way, the soundproof wall moving process, in which the soundproof walls 40 are sequentially moved along the formwork 10 to match the casting location, is carried out in conjunction with the above-mentioned casting process, so that the casting location is always sandwiched between the soundproof walls 40 that are arranged opposite each other in the upstream and downstream directions of the dam 1. This makes it possible to efficiently reduce noise generated at the casting location even when construction work on the dam 1 is carried out around the clock.

[0057] In addition, by configuring the embankment construction system, which constructs a dam 1 (embankment) by pouring CSG material (embankment material), with a formwork 10 that defines the area where the CSG material (embankment material) is poured, a soundproof wall 40 that is supported so that it can be moved freely by the formwork 10, and a work machine such as a bulldozer 8 or a vibratory roller 9 that is used to construct the dam 1 (embankment), it becomes possible to move the soundproof wall 40 along the formwork 10 to match the location where the work machine is working, thereby efficiently reducing the noise generated by the work machine during work.

[0058] According to the above embodiment, the following advantageous effects are achieved.

[0059] In this embodiment, the soundproof wall 40, which is movably supported by the formwork 10, is moved along the formwork 10 to a casting location where the CSG material (bank body material) is cast.

[0060] In this way, by moving the soundproof wall 40 to the placement location where the CSG material (embankment material) is being placed, i.e., the location where the bulldozer 8 is performing leveling work or the vibrating roller 9 is performing compaction work, the soundproof wall 40 can effectively prevent noise generated by the work from spreading to the surrounding area. As a result, the noise generated when constructing the dam 1 (embankment body) can be reduced.

[0061] Furthermore, as described above, by configuring a bank construction system for constructing a dam 1 (bank body) by pouring CSG material (bank body material) as a system including formwork 10 that defines an area where the CSG material (bank body material) is poured, soundproof wall 40 movably supported by formwork 10, and work machines such as bulldozer 8 and vibrating roller 9 used in constructing the dam 1 (bank body), it becomes possible to appropriately move the soundproof wall 40 to the pouring location where the CSG material (bank body material) is poured by the work machines, i.e., the location where the bulldozer 8 is performing leveling work or the vibrating roller 9 is performing compaction work. This allows the soundproof wall 40 to prevent noise from the work machines from spreading to the surrounding area, thereby reducing noise generated during the construction of the dam 1 (bank body).

[0062] The following modified examples are also within the scope of the present invention, and it is possible to combine the configuration shown in the modified example with the configuration described in the above embodiment, or to combine the configurations described in the different modified examples below.

[0063] In the above embodiment, the soundproof wall 40 is fixed to the soundproofing device 100. Alternatively, the soundproof wall 40 may be fixed to a known lifting device equipped with a lifting device that lifts the formwork 10 installed when pouring the lower layer and moves it to the upper layer, thereby allowing the lifting device to function as a soundproofing device. The soundproof wall 40 may also be fixed to a known form support device that applies a load to the formwork 10 from above or supports the formwork 10 from the side, thereby preventing the formwork 10 from shifting position during pouring, thereby allowing the form support device to function as a soundproofing device.

[0064] Furthermore, in the above embodiment, the soundproof wall 40 is attached to a frame 20 having a first support 21 and a second support 22, but the soundproof wall 40 may not be attached to a frame 20 of such a structure, and may simply have a moving mechanism equivalent to the running device 30 provided at its lower end.

[0065] Furthermore, in the above embodiment, the soundproofing device 100 is operated to move toward the concrete pouring location, but the soundproofing device 100 may also be controlled by a central management system so that it automatically follows and moves in response to changes in the work area in which the bulldozer 8 or the vibratory roller 9 is working.

[0066] Furthermore, in the above embodiment, the soundproofing device 100 is configured to travel by the driving force of the electric motor 34, but the soundproofing device 100 may also be configured to be moved by human power.

[0067] Furthermore, in the above embodiment, the formwork 10 is installed in a substantially linear shape, but the formwork 10 may be installed in an arc shape, for example, to match the shape of the dam 1 (bank body).

[0068] In addition, in the above embodiment, work areas where leveling work is carried out and work areas where compaction work is carried out are exemplified as pouring locations where CSG material (dam body material) is poured, but the pouring locations are not limited to these work areas and include work areas where relatively loud work noises are generated when work related to pouring is carried out by work machinery, such as joint cutting work areas where work to create horizontal joints is carried out using a vibrating joint cutting machine, compaction work areas where additional compaction work is carried out by another compaction work machine after the compaction work of the vibrating roller 9, and additional work areas where additional work is carried out by other work machines.

[0069] In addition, in the above embodiment, the case where the dam body material of the dam 1 (dam body) constructed using the formwork 10 is CSG material has been described, but the dam body material is not limited to CSG material and may also be a general concrete material.

[0070] Although the embodiments of the present invention have been described above, the above embodiments merely illustrate some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above embodiments. [Explanation of symbols]

[0071] 100 Soundproofing device 1. Dam (embankment) 10. Formwork 30. Traveling device (moving mechanism) 40. Soundproof wall

Claims

1. A method for constructing a bank body using a formwork, comprising the steps of: Installing the formwork; a step of pouring a bank body material into a pouring location within the area partitioned by the formwork; and moving the soundproof wall movably supported by the formwork to the casting location along the formwork. Embankment construction method.

2. The formwork is installed along a predetermined installation direction, The casting location changes along the installation direction, The soundproof wall moves along the formwork in accordance with the casting location. The method for constructing a dam body according to claim 1.

3. The soundproof wall has a movement mechanism for moving along the formwork, The formwork is provided with a portion along which the moving mechanism is guided or a running surface along which the moving mechanism runs. A method for constructing a dam body according to claim 1 or 2.

4. A bank construction system for constructing a bank by pouring bank materials, a formwork defining an area where the bank body material is poured; a soundproof wall movably supported by the formwork; a work machine used to construct the bank body, Dam construction system.

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