Method for constructing embankment body and transport device

Abstract

To provide a construction method of a dam body and a conveyance device allowing efficient construction work of the dam body.SOLUTION: The construction method of a dam body uses a concrete conveyance device having multiple conveyance pipes, multiple conveyance pipe receiving stringers and multiple columns. The conveyance pipe includes a first conveyance pipe unit 10A and a second conveyance pipe unit 10B connected to a lower part of the first conveyance pipe unit 10A. The conveyance pipe receiving stringer includes a first receiving stringer 20A facing the first conveyance pipe unit 10A, and a second receiving stringer 20B connected to the first receiving stringer 20A and facing the second conveyance pipe unit 10B. The construction method includes the steps of: releasing the connection of the second conveyance pipe unit 10B to the first conveyance pipe unit 10A; releasing the connection of the second receiving stringer 20B to the first receiving stringer 20A; and removing the second conveyance pipe unit 10B and the second receiving stringer 20B.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to a method for constructing a bank body by transporting materials such as concrete, and a transport device. [Background technology]

[0002] Patent Document 1 describes a conveying device that conveys concrete from the upper part to the lower part of a slope. This conveying device includes multiple conveying pipes arranged along the slope and multiple driving sources that rotate each of the multiple conveying pipes. Multiple blades are fixed to the inner surface of the conveying pipes. Concrete is poured into the conveying pipes via a hopper and a conveyor, and is conveyed to the lower part of the slope while being mixed and stirred by the multiple blades inside the rotating conveying pipes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-260624 Summary of the Invention [Problem to be solved by the invention]

[0004] The concrete transported by the transport device is poured at the bottom of the slope, and the embankment is constructed by pouring the concrete from the bottom to the top of the slope. In addition, a dump truck may be positioned at the bottom of the slope to receive the concrete that has been passed through the transport pipe.

[0005] As concrete is poured from the lower part of the slope, the multiple transfer pipes are removed from the lower part of the slope. The multiple transfer pipes are removed one by one from the lower part of the slope. However, each transfer pipe can be as long as 10 meters. When these transfer pipes are removed one by one, the distance between the dump truck and the lower end of the transfer pipe becomes long. This long distance between the dump truck and the lower end of the transfer pipe can make it difficult to directly transfer concrete from the lower end of the transfer pipe to the dump truck. Therefore, a distributor or other device that transports concrete may need to be installed at the lower end of the transfer pipe, which can make it difficult for the dump truck to receive the concrete. Therefore, the current situation is that embankment construction work cannot be carried out efficiently.

[0006] The present disclosure aims to provide a method for constructing a levee body and a transport device that enable construction work of the levee body to be carried out efficiently. [Means for solving the problem]

[0007] The method for constructing a bank body according to the present disclosure comprises a plurality of transport pipes arranged along a slope, each of which has a plurality of blades on its inner circumferential surface and is rotatable, a plurality of transport pipe support members supporting each of the transport pipes below each of the transport pipes, and a plurality of struts interposed between the slope and the transport pipe support members to support the transport pipe support members, and the method involves pouring concrete into the plurality of transport pipes and transporting the concrete obliquely downward along the slope, thereby constructing a bank body from the bottom to the top of the slope, wherein the transport pipes include a first transport pipe unit and a second transport pipe unit connected below the first transport pipe unit, and the transport pipe support members are arranged below the first transport pipe unit. The beam member includes a first support beam member facing the first conveying pipe unit and a second support beam member connected to the first support beam member and facing the second conveying pipe unit, the first support beam member having a first support portion that supports the first conveying pipe unit vertically to the rotation direction and a second support portion that supports the first conveying pipe unit in the axial direction of the conveying pipe, and the second support beam member having a third support portion that supports the second conveying pipe unit vertically to the rotation direction, and the method includes a step of disconnecting the second conveying pipe unit from the first conveying pipe unit, a step of disconnecting the second support beam member from the first support beam member, and a step of removing the second conveying pipe unit and the second support beam member.

[0008] This embankment construction method involves pouring concrete into multiple conveying pipes to construct a dam body, each of which includes a first conveying pipe unit and a second conveying pipe unit. In this construction method, multiple conveying pipe support members are used, each of which includes a first support member and a second support member. Therefore, each of the multiple conveying pipes and each of the multiple conveying pipe support members is divided into multiple units. In this embankment construction method, the second conveying pipe unit connected below the first conveying pipe unit is detached from the first conveying pipe unit and removed, and the second support member facing the second conveying pipe unit is detached from the first support member facing the first conveying pipe unit and removed. Therefore, the conveying pipes and conveying pipe support members can be removed in units shorter than the length of the conveying pipes and conveying pipe support members themselves. Therefore, even if the conveying pipes are long, removal can be performed in short units, preventing the distance between the lower end of the conveying pipe and the dump truck from becoming too great. Furthermore, it is possible to eliminate the need for a distributor or the like to be placed at the lower end of the conveying pipe. As a result, concrete can be easily received by dump trucks, and the construction work of the embankment can be carried out efficiently.

[0009] The above-described method for constructing a bank wall may include a step of connecting a third transport pipe unit that is shorter than the second transport pipe unit after the step of removing the second transport pipe unit and the second support girder. In this case, by connecting the third transport pipe unit that is shorter than the second transport pipe unit after removing the second transport pipe unit and the second support girder, it is possible to fine-tune the distance between the lower end of the transport pipe and the dump truck. This makes it even easier for the dump truck to receive the concrete.

[0010] In the step of connecting the third conveying pipe unit, a third support beam facing the third conveying pipe unit and a fourth support portion that rotatably supports the outer peripheral surface of the third conveying pipe unit may be connected in addition to connecting the third conveying pipe unit. In this case, the connected third conveying pipe unit can be more reliably supported by the third support beam and the fourth support portion.

[0011] The conveying device of the present disclosure comprises a plurality of conveying pipes arranged along a slope, each having a plurality of blades on its inner surface and being rotatable, a plurality of conveying pipe support members supporting each of the conveying pipes below each of the plurality of conveying pipes, and a plurality of struts interposed between the slope and the conveying pipe support members to support the conveying pipe support members, wherein the conveying pipes include a first conveying pipe unit having a flange portion and a second conveying pipe unit connected below the first conveying pipe unit, and the conveying pipe support members include a first support member facing the first conveying pipe unit and a second support member connected to the first support member and facing the second conveying pipe unit, and the first support member comprises a first support portion that rotatably supports the outer surface of the first conveying pipe unit and a second support portion that supports the flange portion of the first conveying pipe unit, and the second support member comprises a third support portion that rotatably supports the outer surface of the second conveying pipe unit.

[0012] This transport device includes multiple transport pipes that transport concrete diagonally downward and multiple transport pipe support members facing each of the multiple transport pipes. Each transport pipe includes a first transport pipe unit and a second transport pipe unit, and each transport pipe support member includes a first support member and a second support member. Therefore, similar to the above-mentioned embankment wall construction method, the second transport pipe unit connected below the first transport pipe unit and the second support member facing the second transport pipe unit can be removed. Therefore, the transport pipes and transport pipe support members can be removed in units shorter than the length of the transport pipes and transport pipe support members themselves, preventing the distance between the lower end of the transport pipe and the dump truck from becoming too great. As a result, concrete can be easily received by the dump truck, thereby efficiently constructing the embankment wall. [Effects of the Invention]

[0013] According to the present disclosure, construction work of a dam body can be carried out efficiently. [Brief explanation of the drawings]

[0014] [Figure 1]FIG. 1 is a diagram showing an example of a construction site to which a method for constructing a bank body and a transport device according to an embodiment are applied. [Figure 2] 2 is a side view showing the conveying pipe of the conveying device of FIG. [Figure 3] 3 is a side view showing the conveying pipe and the support portion of the conveying device of FIG. 2. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a diagram schematically showing a plurality of blades arranged on the inner circumferential surface of the transfer pipe of FIG. [Figure 6] 6(a), 6(b), 6(c), and 6(d) are diagrams schematically showing each step in the method for constructing a bank body according to the embodiment. [Figure 7] 7(a), 7(b), and 7(c) are diagrams showing examples of steps in a method for constructing a bank body according to a modified example. [Figure 8] Fig. 8(a) is a diagram showing a schematic diagram of the positional relationship between the lower end of the transport pipe and the dump truck, and Fig. 8(b) is a diagram showing a schematic diagram of the positional relationship when the distance between the lower end of the transport pipe and the dump truck is long. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of a conveying device according to the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, identical or corresponding elements are designated by the same reference numerals, and duplicate explanations will be omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated to facilitate understanding, and the dimensional proportions and the like are not limited to those shown in the drawings.

[0016] In this disclosure, the term "levee body" refers to the main body of a dam or embankment. FIG. 1 shows an exemplary site A having a slope S in which the conveying device 1 according to this embodiment is used. The site A is, for example, a dam construction site. The slope S of the site A does not have a constant gradient, but includes steep and gentle slopes. The conveying device 1, for example, includes a plurality of conveying pipes 10 that convey concrete M for constructing the embankment body and are arranged along the slope S, a plurality of conveying pipe support girders 20 that support the plurality of conveying pipes 10, and a plurality of supports 30 that are interposed between the plurality of conveying pipe support girders 20 and the slope S.

[0017] Each of the multiple supports 30 is erected to extend vertically between the conveying pipe support girders 20, which extend diagonally in a straight line, and the slope S, which has a varying gradient. For example, the supports 30 are provided at predetermined intervals relative to the multiple conveying pipes 10, and support the multiple conveying pipes 10 on the slope S via the multiple conveying pipe support girders 20. The lengths (heights) of the multiple supports 30 differ from one another depending on the position according to the gradient of the slope S.

[0018] The conveying device 1 may include a hopper 2 above a plurality of conveying pipes 10 that receives concrete M, and a conveyor 3 that extends from below the hopper 2 toward the conveying pipes 10. Concrete M is poured into the hopper 2, for example, from a truck T located above the slope S, and the concrete M poured into the hopper 2 is transported to the conveying pipes 10 by the conveyor 3.

[0019] Concrete M is poured from the conveyor 3 into the uppermost transport pipe 10, and the concrete M poured into the transport pipe 10 is transported diagonally downward while being rocked or mixed and stirred. Each of the multiple transport pipes 10 is rotatable in the circumferential direction of the transport pipe 10 (around the axis of the transport pipe 10), and as each transport pipe 10 rotates, the concrete M moves diagonally downward while being rocked or mixed and stirred. This prevents the concrete M from separating into materials. The concrete M is then discharged from the lower end 10x of the transport pipe 10 and loaded, for example, into a dump truck D.

[0020] FIG. 2 is an enlarged side view of the connection portion between two conveying pipes 10. As shown in FIGS. 1 and 2, for example, multiple conveying pipes 10 are not fixed to each other and are arranged in a nested manner. The conveying pipes 10 rotate around their axes extending in the axial direction D1. The conveying pipes 10 include, for example, a first conveying pipe unit 10A located at the upper end of the conveying pipe 10 and a second conveying pipe unit 10B connected to the lower part of the first conveying pipe unit 10A. The first conveying pipe unit 10A and the second conveying pipe unit 10B are connected to each other by, for example, joining a flange 10c located at the lower end of the first conveying pipe unit 10A to a flange 10d located at the upper end of the second conveying pipe unit 10B with bolts and nuts. Note that when there are multiple second conveying pipe units 10B, the second conveying pipe units 10B are similarly joined to each other by joining their flanges 10c and 10d with bolts and nuts.

[0021] The first conveying pipe unit 10A includes a flange portion 11 that receives the conveying pipe 10 positioned diagonally above, a first support portion 12 that rotatably supports the first conveying pipe unit 10A, and a second support portion 13 that supports the flange portion 11. The second conveying pipe unit 10B includes a third support portion 14 that rotatably supports the second conveying pipe unit 10B. The second conveying pipe unit 10B may include one third support portion 14 or multiple third support portions 14. The conveying pipe 10 is arranged at an angle along the slope S, and a load acts on the conveying pipe 10 due to its own weight and the weight of the concrete M being conveyed. The load acting in a direction perpendicular to the rotation direction of the conveying pipe 10 is supported by the first support portion 12 provided on the first conveying pipe unit 10A and the third support portion 14 provided on the second conveying pipe unit 10B. The load acting in a direction of downward movement along the axial direction D1 of the conveying pipe 10 is supported by the second support portion 13 of the first conveying pipe unit 10A.

[0022] The flange portion 11 has a flange shape that protrudes in a radially expanding direction from the outer peripheral surface 10b of the conveying pipe 10. In this embodiment, the flange portion 11 has a first expanded diameter portion 11b that expands in diameter, a second expanded diameter portion 11c that receives the upper conveying pipe 10, and a recessed portion 11d that reduces in diameter between the first expanded diameter portion 11b and the second expanded diameter portion 11c. At this time, the lower end of the upper conveying pipe 10 is inserted into the flange portion 11 of the lower conveying pipe 10.

[0023] The first support part 12 of the first conveying pipe unit 10A includes, for example, rollers 12b that rotatably support the first conveying pipe unit 10A. Furthermore, the first conveying pipe unit 10A is provided with a rotational drive part 16 that rotates the conveying pipe 10. The rotational drive part 16 includes a chain that is wound around the conveying pipe 10, a sprocket located outside the conveying pipe 10 and around which the chain is wound, and a motor that supplies rotational drive force to the sprocket, and the conveying pipe 10 rotates when the rotational drive force of the motor is transmitted to the conveying pipe 10 via the sprocket and chain.

[0024] The first transfer tube unit 10A is provided with a first support part 12, a second support part 13, and a rotation drive part 16. The second transfer tube unit 10B is provided with a third support part 14. Note that the second transfer tube unit 10B does not have a rotation drive part. The first transfer tube unit 10A, which is located at the top, is provided with a second support part 13 and a rotation drive part 16. By providing the first transfer tube unit 10A with the second support part 13 and the rotation drive part 16, the single structure of the first transfer tube unit 10A can transmit a rotation drive force to the transfer tube 10. The rotation drive force is transmitted to the second transfer tube unit 10B, which is connected to the first transfer tube unit 10A, via the first transfer tube unit 10A. Therefore, by connecting (for example, multiple) second conveying pipe units 10B to the conveying pipe 10 (first conveying pipe unit 10A), which rotates to shake or mix the concrete M inside, the conveying pipe 10 can be securely supported on the slope via the first support portion 12, the second support portion 13, and the third support portion 14.

[0025] The second support portion 13 is, for example, a support member with rollers. Specifically, the second support portion 13 includes a thrust receiving roller 13b that functions as a thrust receiving member, which is a load in the axial direction (D1) of the conveying pipe 10 (first conveying pipe unit 10A), via the flange portion 11, and a roller support portion 13c that rotatably supports the thrust receiving roller 13b. The roller support portion 13c includes, for example, two steel members 13d that are aligned along the axial direction D1 of the conveying pipe 10. The roller support portion 13c is a portion that supports the thrust receiving roller 13b from diagonally below (below in the inclination direction) and is made of, for example, the steel member 13d. The steel members 13d are plate-shaped and are arranged diagonally below (below in the inclination direction) the thrust receiving roller 13b so as to be aligned along the axial direction D1. The conveying pipe support beam 20 (first support beam 20A) is a beam to which the roller support portion 13c (steel material 13d) is fixed, and extends in the axial direction D1 below the roller support portion 13c. The conveying pipe support beam 20 (first support beam 20A) is inclined.

[0026] 3 is a side view showing one conveying pipe 10. As shown in FIGS. 2 and 3, for example, the conveying pipe 10 includes one first conveying pipe unit 10A and three second conveying pipe units 10B. However, the number of first conveying pipe units 10A and second conveying pipe units 10B is not particularly limited. For example, the length L2 of the second conveying pipe unit 10B is the same as the length L1 of the first conveying pipe unit 10A, but may be different from the length L1 of the first conveying pipe unit 10A.

[0027] The length L1 of the first conveying pipe unit 10A and the length L2 of the second conveying pipe unit 10B are, for example, 1.0 m or more and 3.0 m or less. However, the length L1 of the first conveying pipe unit 10A and the length L2 of the second conveying pipe unit 10B may be 1.5 m, 2.0 m, or 2.5 m. As an example, the lengths L1 and L2 are 3.0 m, and the length of the conveying pipe 10 is 12 m.

[0028] The conveying pipe support member 20 comprises a first support member 20A facing the first conveying pipe unit 10A and a second support member 20B facing the second conveying pipe unit 10B. Of the conveying pipe support members 20, the first support member 20A supports the first support member 12, the second support member 13, and the rotation drive unit 16, while the second support member 20B supports the third support member 14. That is, the first support member 12, the second support member 13, and the rotation drive unit 16 are fixed to the upper surface of the first support member 20A, and the third support member 14 is fixed to the upper surface of the second support member 20B. The first support member 20A and the second support member 20B are detachably joined to each other. As an example, the first support member 20A and the second support member 20B may be H-shaped steel and joined to each other using a splice plate and high-strength bolts.

[0029] 3 and 4, the third support portion 14 includes a pair of rollers 14b that contact the outer peripheral surface 10b of the conveying pipe 10 and are aligned along the width direction D2, a pair of rotation support portions 14c that rotatably support each roller 14b, and a base portion 14d that supports the pair of rotation support portions 14c on the conveying pipe support beam material 20. The rollers 14b are, for example, impact rollers that rotatably support the second conveying pipe unit 10B.

[0030] The rotation support portion 14c includes, for example, a shaft portion 14f extending along the axial direction D1 and a bracket 14g fixed to the upper surface of the base portion 14d to hold the shaft portion 14f. The base portion 14d includes, for example, a steel member 14h fixed to the conveying pipe support beam member 20 and a fixing member 14j fixed to the upper portion of the steel member 14h and to which the bracket 14g is fixed. As an example, the base portion 14d includes a pair of steel members 14h aligned along the width direction D2, and the fixing member 14j extends in the width direction D2 to span the pair of steel members 14h.

[0031] Fixed inside the conveying pipe 10 are plate-shaped blades 50 that rock, mix, and agitate the concrete M being conveyed inside the conveying pipe 10. The blades 50 are inclined with respect to the axial direction D1 and the rotational direction D3 on the inner peripheral surface 60b inside the conveying pipe 10, and move in the rotational direction D3 as the conveying pipe 10 rotates, coming into contact with the concrete M that moves diagonally downward. The blades 50 are, for example, fan-shaped.

[0032] As an example, the blade 50 includes a first arc-shaped portion 51 fixed to the inner circumferential surface 60b of the outer tube 60 of the conveying pipe 10, a first linear portion 52 extending from one end of the first arc-shaped portion 51 in the rotational direction D3 toward the inside in the radial direction D4 of the conveying pipe 10, a second linear portion 53 extending from the other end of the first arc-shaped portion 51 in the rotational direction D3 toward the inside in the radial direction D4 of the conveying pipe 10, and a second arc-shaped portion 54 connecting the inner ends of the first linear portion 52 in the radial direction D4 and the inner ends of the second linear portion 53 in the radial direction D4. The central angle θ of the first arc-shaped portion 51 and the second arc-shaped portion 54 is, for example, 75° or more and 90° or less, or may be 60° or more and 120° or less, or 135° or less. In this way, the value of the central angle θ can be changed as appropriate.

[0033] FIG. 5 is a diagram schematically showing the arrangement of multiple blades 50 inside the conveying pipe 10 (first conveying pipe unit 10A and second conveying pipe unit 10B). As shown in FIG. 5, for example, the conveying pipe 10 has multiple blades 50 arranged along the axial direction D1. For example, each of the first conveying pipe unit 10A and the second conveying pipe unit 10B has four or more and five or less blades 50. However, the number of blades 50 is not particularly limited.

[0034] As shown in FIG. 1, as concrete M is transported from the lower end 10x of the transport pipe 10 and construction of the embankment body using the concrete M progresses, the height of the top surface M1 of the hardened concrete M at the site A gradually increases, and the concrete M is gradually removed from the lower of the multiple transport pipes 10. However, since the length of the transport pipes 10 is long, for example 12 m, when the transport pipes 10 are removed one by one, the distance between the top surface M1 of the concrete M or the dump truck D and the lower end 10x of the transport pipe 10 becomes long when one transport pipe 10 is removed. Therefore, as the concrete M transported by the transport pipe 10 is transferred and unloaded, the falling height of the transported concrete M increases, resulting in a deterioration in the quality of the concrete.

[0035] Therefore, in the conveying device 1 and the method for constructing a dam body according to this embodiment, the conveying pipe 10 includes a first conveying pipe unit 10A and a second conveying pipe unit 10B, and the conveying pipe 10 can be partially removed in units of the conveying pipe units that make up the conveying pipe 10. Below, an example of the method for constructing a dam body according to this embodiment will be described.

[0036] First, as shown in Figures 6(a) and 6(b), when the construction of the embankment body progresses by pouring concrete M and the top surface M1 of the concrete M approaches the lower end 10x of the conveying pipe 10, the connection between the second conveying pipe unit 10B at the lower end of the conveying pipe 10 and the second-lowest second conveying pipe unit 10B is released.

[0037] As shown in Figure 6(c), the lower second conveying pipe unit 10B is lifted with a lifting machine such as a crane and the lower second conveying pipe unit 10B is removed. Similarly, the connection between the lower second support beam member 20B and the second-lowest second support beam member 20B is released, and the lower second support beam member 20B and the third support part 14 are removed.

[0038] As shown in Figure 6(d), when the top surface M1 rises due to the pouring of concrete M transported from the lower end 10x of the transport pipe 10, the connection of the second-lowest second transport pipe unit 10B and the second-lowest second support beam material 20B are released, as described above, and the second transport pipe unit 10B and the second support beam material 20B are removed.

[0039] Then, as shown in Figures 7(a) and 7(b), the second conveying pipe unit 10B is disconnected from the first conveying pipe unit 10A (step of disconnecting the second conveying pipe unit), and the second support beam member 20B is disconnected from the first support beam member 20A (step of disconnecting the second support beam member). Then, as described above, the second conveying pipe unit 10B and the second support beam member 20B are removed (removal step). In the above steps, even after the second conveying pipe unit 10B and the second support beam member 20B are removed, the conveying pipe 10 continues to be supported in a rotatable state by the first conveying pipe unit 10A above the second conveying pipe unit 10B and the second support beam member 20B. Then, after the removal of the second conveying pipe unit 10B and the second receiving beam material 20B, which were connected to the first conveying pipe unit 10A and the first receiving beam material 20A, respectively, is completed, the first conveying pipe unit 10A and the first receiving beam material 20A are removed. Multiple conveying pipes 10, each with multiple second conveying pipe units 10B connected to one first conveying pipe unit 10A, are installed continuously on the slope. After the first conveying pipe unit 10A of the conveying pipe 10 is removed, the transport of the concrete M continues by the conveying pipe 10 located above the conveying pipe 10.

[0040] As described above, in this embodiment, removal is performed in units of the second conveying pipe unit 10B and the second receiving beam material 20B. Therefore, as illustrated in FIG. 8(a), the lower end 10x of the conveying pipe 10 (first conveying pipe unit 10A) can be brought closer to the dump truck D (top surface M1), making it possible to reduce the difference in height from which the concrete M falls. However, as illustrated in FIG. 8(b), for example, if the slope S is steep and the support pillars 30 are longer, even if removal is performed in units of the second conveying pipe unit 10B, the lower end 10x may be separated from the dump truck D (top surface M1), potentially increasing the difference in height from which the concrete M falls.

[0041] Therefore, in this embodiment, as shown in Figure 7 (c), after removing the second conveying pipe unit 10B and the second support beam material 20B, a third conveying pipe unit 10C, which is shorter than the second conveying pipe unit 10B, is connected (step of connecting the third conveying pipe unit). The length of the third conveying pipe unit 10C is, for example, 0.5 m or more and 2.0 m or less, and may be 1.0 m or 1.5 m, for example. However, the length of the third conveying pipe unit 10C is not limited to the above example.

[0042] In addition, multiple types of third conveying pipe units 10C with different lengths may be prepared. Then, a third conveying pipe unit 10C that corresponds to the distance between the dump truck D (top surface M1) and the lower end 10x may be selected and connected to the first conveying pipe unit 10A. This connection may be made, for example, by bolt and nut joining, or the third conveying pipe unit 10C may be connected as a cantilever. In addition, in addition to connecting the third conveying pipe unit 10C, a third support beam member 20C facing the third conveying pipe unit 10C and a fourth support portion 15 that rotatably supports the outer peripheral surface of the third conveying pipe unit 10C may also be connected. The third support beam member 20C is a beam member shorter than the second support beam member 20B, and for example, the fourth support portion 15 has a configuration similar to that of the third support portion 14 described above. Even in this case, the third conveying pipe unit 10C is connected to the first conveying pipe unit 10A, and the fourth support portion 15 of the third support beam 20C connected to the first support beam 20A supports the third conveying pipe unit 10C, so that the rotating conveying pipe 10 (first conveying pipe unit 10A) can be more reliably supported even if it is inclined on a slope.

[0043] As described above, by connecting the third conveying pipe unit 10C, which is even shorter than the second conveying pipe unit 10B, the height of the lower end 10x of the conveying pipe 10 relative to the dump truck D (top surface M1) can be fine-tuned even if the gradient of the slope S changes randomly and the length of the support 30 varies, so it is possible to maintain the height from the dump truck D to the lower end 10x within a predetermined range. Note that the support 30 is removed when the conveying pipe 10 (first conveying pipe unit 10A) is removed. For example, the removed support 30 is lifted by a crane in the same way as the conveying pipe 10.

[0044] Next, a detailed description will be given of a method for constructing a bank body according to this embodiment, and the effects of the conveying device 1. This method for constructing a bank body is a method for constructing a bank body by pouring concrete M into a plurality of conveying pipes 10, and each conveying pipe 10 includes a first conveying pipe unit 10A and a second conveying pipe unit 10B.

[0045] In the embankment construction method and conveying device 1 according to this embodiment, multiple conveying pipe support members 20 are used, and each conveying pipe support member 20 includes a first support member 20A and a second support member 20B. Therefore, each of the multiple conveying pipes 10 and each of the multiple conveying pipe support members 20 are divided into multiple units. In this embankment construction method and conveying device 1, the second conveying pipe unit 10B connected below the first conveying pipe unit 10A is detached from the first conveying pipe unit 10A and removed, and the second support member 20B is detached from the first support member 20A facing the first conveying pipe unit 10A and removed.

[0046] Therefore, the conveying pipe 10 and the conveying pipe support girders 20 can be removed in units shorter than the length of the conveying pipe 10 and the conveying pipe support girders 20 themselves. Therefore, even if the conveying pipe 10 is long, it can be removed in short units, so the distance between the lower end 10x of the conveying pipe 10 and the dump truck D can be prevented from becoming too great. This also eliminates the need to place a distributor or the like at the lower end 10x of the conveying pipe 10. As a result, the dump truck D can easily receive the concrete M, so the embankment construction work can be carried out efficiently.

[0047] The method for constructing a bank body according to this embodiment may include a step of connecting a third conveying pipe unit 10C that is shorter than the second conveying pipe unit 10B after the step of removing the second conveying pipe unit 10B and the second support girder material 20B. In this case, by connecting the third conveying pipe unit 10C that is shorter than the second conveying pipe unit 10B after removing the second conveying pipe unit 10B and the second support girder material 20B, it is possible to fine-tune the distance between the lower end 10x of the conveying pipe 10 and the dump truck D. This makes it even easier for the dump truck D to receive the concrete M.

[0048] In the process of connecting the third conveying pipe unit 10C, the third conveying pipe unit 10C may be connected, and at the same time, a third support beam 20C facing the third conveying pipe unit 10C and a fourth support portion 15 that rotatably supports the outer peripheral surface of the third conveying pipe unit 10C may also be connected. In this case, the connected third conveying pipe unit 10C can be more reliably supported by the third support beam 20C and the fourth support portion 15.

[0049] Depending on the length of the third conveying pipe unit 10C, it may not be necessary to connect the third support beam 20C and the fourth support portion 15. In other words, only the third conveying pipe unit 10C may be connected. In this case, fine adjustment of the distance between the lower end 10x of the conveying pipe 10 and the dump truck D can be easily performed.

[0050] The above describes embodiments of the embankment construction method and the transport device according to the present disclosure. However, the embankment construction method and the transport device according to the present disclosure are not limited to the above-described embodiments, and may be modified or applied to other applications without departing from the spirit of the claims. In other words, the content and order of each step of the embankment construction method, as well as the shape, size, number, material, and arrangement of each part of the transport device, may be modified as appropriate without departing from the spirit of the present disclosure.

[0051] For example, in the above-described embodiment, a conveying device 1 was described that includes a conveying pipe 10 having a first conveying pipe unit 10A and a plurality of second conveying pipe units 10B, and a conveying pipe support member 20 having a first support member 20A and a plurality of second support members 20B. This allows the conveying pipe and conveying pipe support members to be removed in smaller units, further improving workability. However, the number of first conveying pipe units 10A, second conveying pipe units 10B, first support members 20A, and second support members 20B is not particularly limited. For example, at least one of the number of second conveying pipe units 10B and the number of second support members 20B may be single.

[0052] In the above-described embodiment, the second support portion 13 includes the thrust-receiving roller 13b, the roller support portion 13c, and the steel material 13d. However, the configuration of the second support portion is not limited to the above example and can be changed as appropriate. The same applies to the first support portion and the third support portion.

[0053] Furthermore, in the above-described embodiment, the conveying device 1 is described as having support pillars 30. However, the number and arrangement of the support pillars can be changed as appropriate. Furthermore, in the above-described embodiment, the conveying device 1 is described as having a plurality of arc-shaped blades 50. However, the shape, size, material, number, and arrangement of the blades can be changed as appropriate. Furthermore, in the above-described embodiment, site A, which is a dam construction site, is exemplified. However, the conveying device according to the present disclosure can also be applied to sites other than dam construction sites. [Explanation of symbols]

[0054] 1... conveying device, 2... hopper, 3... conveyor, 10... conveying pipe, 10A... first conveying pipe unit, 10B... second conveying pipe unit, 10C... third conveying pipe unit, 10b... outer circumferential surface, 10c... flange, 10d... flange, 10x... lower end, 11... flange portion, 11b... first enlarged diameter portion, 11c... second enlarged diameter portion, 11d... recessed portion, 12... first support portion, 12b... roller, 13... second support portion, 13b... thrust receiving roller, 13c... roller support portion, 13d... steel material, 14... third support portion, 14b... roller, 14c... rotation support portion, 14d... base portion, 14f...shaft portion, 14g...bracket, 14h...steel material, 14j...fixing member, 15...fourth support portion, 16...rotation drive portion, 20...transport pipe support member, 20A...first support member, 20B...second support member, 20C...third support member, 30...support column, 50...wing, 51...first arc-shaped portion, 52...first straight portion, 53...second straight portion, 54...second arc-shaped portion, 60...outer pipe, 60b...inner surface, A...site, D...dump truck, D1...axial direction, D2...width direction, D3...rotation direction, D4...radial direction, M...concrete, M1...top surface, S...slope, T...truck, θ...central angle.

Claims

1. a plurality of rotatable conveying pipes arranged along the inclined surface, each having a plurality of blades on its inner circumferential surface; A plurality of conveying pipe support members that support each of the conveying pipes below each of the plurality of conveying pipes; a plurality of supports interposed between the inclined surface and the conveying pipe support member to support the conveying pipe support member; A method for constructing a bank body, comprising: pouring concrete into the plurality of conveying pipes, conveying the concrete obliquely downward along the slope, and constructing a bank body from below the slope upward, the conveying pipe includes a first conveying pipe unit and a second conveying pipe unit connected below the first conveying pipe unit, the conveying pipe support member includes a first support member facing the first conveying pipe unit, and a second support member connected to the first support member and facing the second conveying pipe unit, the first support beam member includes a first support portion that supports the first conveying pipe unit vertically with respect to a rotation direction, and a second support portion that supports the first conveying pipe unit in an axial direction of the conveying pipe, the second support beam member includes a third support portion that supports the second conveying pipe unit vertically with respect to a rotation direction, disconnecting the second conveying pipe unit from the first conveying pipe unit; releasing the connection of the second support beam member to the first support beam member; removing the second conveying pipe unit and the second support beam; Equipped with After the step of removing the second conveying pipe unit and the second support beam material, a step of connecting a third conveying pipe unit that is shorter than the second conveying pipe unit, How to construct the embankment.

2. In the step of connecting the third conveying pipe unit, a third support member that connects the third conveying pipe unit and faces the third conveying pipe unit, and a fourth support portion that rotatably supports the outer peripheral surface of the third conveying pipe unit; A method for constructing a levee according to claim 1.

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