JPH1136267A - Conveying method and conveying device for dam concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce conveying cost without causing material separation. SOLUTION: A tubular chute 14 is provided with a cylindrical casing 14a opened at both ends and resistance vanes 14b fixed with the outer peripheral edges to the casing 14a. The casing 14a is extended from the vicinity of a concrete plant 10 to the placing position on the lower end side of a slope 20, and an opening on the upper end side is located near a concrete carrying-in device 12. The resistance vanes 14b are a plurality of plates having the width of about 1/2 of the diameter of the casing 14a, and they are provided to circulate about 1/2 of the inner periphery of the casing 14a. The members constituting the resistance vanes 14b are bent to be twisted downward so that the upper and lower faces form a part of a spiral. The concrete C inserted into the casing 14a flows along the bent faces when it flows down in contact with the resistance vanes 14b, and it flows down while being rotated into a spiral shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for transporting concrete for dams, and more particularly to a method and apparatus for transporting concrete in a vertical direction.

[0002]

2. Description of the Related Art As a method of transporting concrete at a construction site of a concrete dam, a method of transporting concrete buckets in a three-dimensional direction by using a cable crane, a jib crane, or the like is known.

However, in the RCD method and the extended layer method (ELCM method), which have been developed as recent rationalized construction methods, movement on a casting surface is carried out by loading on a dump truck, and is carried out from a batcher plant. Transport to the surface,
It is performed by a cable crane, an incline, a belt conveyor, or the like.

That is, in this kind of rationalized construction method, the horizontal transportation is limited to the dump truck, but in the vertical direction, if only the transportation from the batcher plant to the casting surface is considered. For this reason, the degree of freedom in selecting a concrete transporting device is increased, and various devices as described above can be used.

[0005] However, such a transport device includes:
There were problems described below.

[0006]

That is, in the transport of concrete by a belt conveyor, the concrete is transshipped a plurality of times.
Material separation may occur, and when material separation occurs, re-mixing takes time and effort.

[0007] Further, in the case of transportation by a cable crane or an incline, since the equipment itself is expensive, the transportation cost of concrete increases.

[0008] The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a concrete for dams that does not cause material separation and that can reduce transportation costs. It is to provide a carrying method and a carrying device.

[0009]

In order to achieve the above-mentioned object, the present invention relates to a dam for dams to be built from a concrete plant installed on a slope near a top end level of a dam to be built toward a concrete casting surface on a lower end side of the slope. A method for transporting concrete for use, comprising, between the concrete plant and the casting position, installing a cylindrical chute provided with resistance wings for causing the concrete to flow down while spirally turning along the slope. After the concrete discharged from the concrete plant is put in from the upper end side of the tubular chute, and the put concrete is caused to flow down spirally along the resistance blade, the concrete is received at the lower end of the tubular chute. I accepted it. Further, the present invention is a device for transporting concrete for dams from a concrete plant installed on a slope near a top end level of a dam to be built toward a concrete casting surface on a lower end side of the slope, wherein the concrete plant and the concrete plant A tubular chute installed between the casting position and a concrete carry-in device installed between the concrete plant and the cylindrical chute to supply concrete discharged from the concrete plant to the cylindrical chute; A hopper station installed at the lower end side of the cylindrical chute to receive and store the concrete; the cylindrical chute has a cylindrical casing having both ends opened along the slope; The outer peripheral edge is fixed inside, and the poured concrete flows down while spirally turning It was constituted by the anti-wing. According to the transporting method and the transporting device having the above configuration, the concrete is caused to flow down while being spirally swirled in the cylindrical chute, so that material separation is reduced. In addition, since the concrete is transported in the vertical direction by falling due to gravity, the transportation cost can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a method and apparatus for transporting concrete for dams according to the present invention.

FIG. 1 is an overall layout view of a concrete concrete transportation device according to the present invention.
Concrete plant 10 and concrete loading device 1
2, a cylindrical chute 14, and a hopper station 16.

The concrete plant 10 is installed on a slope 20 near the top end of a dam 18 to be built.
Water, cement, which are the constituent materials of concrete C for dams,
It has a tank in which fine aggregate, coarse aggregate, various admixtures, etc. are stored. Concrete constituent materials corresponding to the required mixing ratio are measured and kneaded to produce concrete C for dams. Then, the produced concrete C is sent to the concrete loading device 12.

In the case of the present embodiment, the concrete carrying-in device 12 uses a belt conveyor, and puts the concrete C received from the concrete plant 10 into the cylindrical chute 14, and is not limited to the belt conveyor. A screw conveyor can also be used.

As shown in detail in FIGS. 3 and 4, the cylindrical chute 14 has a cylindrical casing 14 with open ends.
a, and a resistance wing 14b having an outer peripheral edge fixed in the casing 14a.

The casing 14 a extends from the vicinity of the concrete plant 10 along the slope of the slope 20 to a casting position on the lower end side of the slope 20, and an opening on the upper end side is located near the concrete loading device 12. .

The casing 14a is provided with a support material 2 at a plurality of locations.
2 and are connected to units of appropriate length, and when the casting position of concrete C rises with the progress of construction, it is separated for each unit,
It is possible to respond to changes in the casting position.

The resistance blades 14b are a plurality of plate members having a width approximately half the diameter of the casing 14a. In this embodiment, the resistance blades 14b extend around the inner circumference of the casing 14a by approximately 1/2. Is provided.

As shown in FIG. 3, the members constituting each resistance wing 14b are bent so that their upper and lower surfaces are twisted downward so as to form a part of a spiral. The resistance wings 14b arranged in the up-down direction are arranged so that a part of the resistance wings 14b is overlapped on the end side adjacent to the up-down direction.

In the cylindrical chute 14 constructed as described above, the concrete C put in the casing 14a is used.
When this flows down, when it comes into contact with the resistance wing 14b,
By flowing along the curved surface, it flows down while spiraling.

The hopper station 16 is installed near the lower end opening of the casing 14a, as shown in FIG.
The concrete C that has fallen in the cylindrical chute 14 is received and stored therein.

Next, a method of transporting the dam concrete C by using the transport device having the above configuration will be described. When transporting concrete C for a dam, first, concrete C having a predetermined mixing ratio is discharged from the concrete plant 10.

The concrete C discharged from the plant 10 is passed through the concrete loading device 12 to the cylindrical chute 1.
4 into the casing 14a. Cylindrical chute 1
Concrete C placed in the casing 14a of No. 4
Flows down inside the casing 14a while rotating spirally by contacting the resistance wings 14b.

The dropped concrete C is received by the popper station 16 and stored. The concrete C stored in the hopper station 16 is then reloaded on the dump truck 26 and transported to the casting surface.

According to the concrete conveying apparatus and the concrete conveying method constructed as described above, the concrete C
Is caused to flow down while being spirally swirled in the cylindrical chute 14, so that material separation is reduced.

Further, since the concrete C is transported in the vertical direction by dropping by gravity, the transportation cost can be reduced.

[0026]

As described above in detail in the embodiments,
ADVANTAGE OF THE INVENTION According to the transport method and transport apparatus for concrete for dams according to the present invention, there is no occurrence of material separation, and a significant reduction in transport costs can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall layout view of a concrete concrete transportation device according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory sectional view of a cylindrical chute of the concrete concrete transport device according to the present invention.

FIG. 4 is an explanatory plan view of a cylindrical chute of the concrete concrete transport device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Concrete plant 12 Concrete carrying-in device 14 Cylindrical shot 14a Casing 14b Resistance wing 16 Hopper station 18 Dam 20 Slope 22 Supporting material 26 Dump truck

Claims (2)

[Claims] 1. A method for transporting concrete for a dam from a concrete plant installed on a slope near a top end level of a dam to be built toward a concrete casting surface on a lower end side of the slope, comprising: A concrete chute provided with a resistance wing for causing the concrete to flow downward while being spirally swirled along the slope, between the concrete plant and the concrete chute. A method for transporting dam concrete, comprising: introducing concrete from a side; spirally flowing the introduced concrete along the resistance blade; and receiving the concrete at a lower end of the cylindrical chute. 2. A device for transporting concrete for a dam from a concrete plant installed on a slope near a top end level of a dam to be built toward a concrete placing surface on a lower end side of the slope, wherein the concrete plant and the casting plant are provided. And a concrete chute installed between the concrete plant and the cylindrical chute, and a concrete carry-in device for supplying concrete discharged from the concrete plant to the cylindrical chute, A hopper station installed at the lower end side of the cylindrical chute to receive and store the concrete, wherein the cylindrical chute has a cylindrical casing having both ends opened along the slope, and A peripheral edge is fixed to the concrete, and the concrete that flows is spirally swirled and flows down. An apparatus for transporting concrete for dams, comprising anti-wings.