JPH1136268A - 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 chute type placing device 12 is provided with a cylindrical drum 12 a, a spiral vane 12b fixed with the outer peripheral edge to the drum 12 a, and the rotation drive mechanism 12c of the drum 12a. The drum 12a is extended to the placing position on the lower end side of a slope 20 from the vicinity of a concrete plant 10 along the inclination of the slope 20, its opening on the upper end side is communicated with a material feed section 14, and bearing sections 12d are provided to rotatably support it. The spiral vane 12 b is provided over the whole length of the drum 12a, and a spiral space 24 along the inclination of the slope 20 is formed in the drum 12a by the drum 12a and the spiral vane 12 b. Concrete constituting materials are poured from the upper end side of the spiral space 24, the poured concrete constituting materials flow down in the spiral space 24 while being rotated and kneaded, and the kneaded concrete constituting materials are received on the lower end side of the spiral space 24.

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, wherein a chute type casting device provided with a spiral space along the slope is installed between the concrete plant and the casting position, and the concrete plant is weighed. Concrete constituent material is charged from the upper end side of the spiral space, and the charged concrete constituent material is kneaded by flowing down the rotating spiral space, and the kneaded concrete constituent material is mixed with the spiral space. To be received at the lower end side. Also, the present invention
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 casting surface on a lower end side of the slope, wherein the concrete plant is disposed between the concrete plant and the casting position. A chute-type casting device installed in the concrete plant, and a material supply unit that is installed between the concrete plant and the chute-type casting device and supplies the concrete constituent material measured from the concrete plant to the chute-type casting device. And a hopper station installed on the lower end side of the chute type casting device for receiving and storing the kneaded concrete constituent material, wherein the chute type casting device is arranged along the slope. A cylindrical drum rotatably supported at both ends opened, and an outer peripheral edge fixed in the drum, the outer periphery being A spiral blade forming a 隔成 been spiral space at a ram, and constituted by a rotary drive mechanism of the drum. According to the transport method and the transport device having the above-described configuration, the measured concrete component material is charged from the upper end side of the spiral space, and the charged concrete component material is kneaded by flowing down the rotating spiral space. Therefore, there is no need to consider the occurrence of material separation due to transshipment of concrete. Moreover, in the transport method and the transport apparatus of the present invention, the concrete manufacturing process of kneading the concrete constituent material and the transport can be performed simultaneously, so that the transport cost of the concrete can be significantly 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 3 show one 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 chute type casting device 12
, A material supply unit 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 and the like are stored, and weighs concrete constituent materials corresponding to a required mixing ratio and sends them to the material supply unit 14.

As shown in detail in FIG. 3, the chute type casting apparatus 12 has a cylindrical drum 12a having both ends opened.
And a spiral blade 12b having an outer peripheral edge fixed inside the drum 12a, and a rotation drive mechanism 12c for the drum 12a.

The drum 12b extends along the slope 20 from the vicinity of the concrete plant 10 to a casting position on the lower end of the slope 20.
4 and is rotatably supported via a bearing 12d.

FIG. 3 shows only the bearing portions 12d arranged at both ends of the drum 12b, but the drum 12b is not supported by the support material 22 shown in FIG. , Each of which has a bearing portion 12d.

The spiral blade 12b is provided over the entire length of the drum 12a, and the drum 12a and the spiral blade 12b are provided.
, The outer periphery is separated by the drum 12a, and the slope 2
A spiral space 24 along a 0 inclination is formed in the drum 12a.

A drum 12a on which a spiral blade 12b is fixed.
Is a combination of units of an appropriate length. When the placement position of the concrete C rises as the construction progresses, the units are separated for each unit, so that it is possible to cope with a change in the placement position. ing.

The rotary drive mechanism 12c is installed at an intermediate position of the drum 12a.
A driven bevel gear 120c fixedly mounted on the outer periphery of a, a driven bevel gear 121c meshed with the driven bevel gear 120c, and a drive motor 122c to which the driven bevel gear 121c is axially coupled.

The thus configured rotation drive mechanism 12c
When the drive motor 122c is driven to rotate, the drum 1 is driven by the engagement of the driving and driven bevel gears 121c and 120c.
2a and the spiral blade 12b rotate.

As shown in FIG. 2, the hopper station 16 is installed near the lower end opening of the drum 12a, receives the concrete c dropped in the spiral space 24, and stores it inside.

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

The concrete constituent material discharged from the plant 10 is supplied to the spiral space 24 in the drum 12a of the chute type casting device 12 via the material supply unit 14.
At this time, the rotary drive mechanism 12 of the chute type casting device 12
c, the driving motor 122c is
2a rotates together with the internal spiral blade 12b,
Along with this, the spiral space 24 defined in the drum 12a is also rotating.

That is, in the case of the present embodiment, the concrete constituent material is put into the rotating spiral space 24.

When the concrete constituent material is put into the spiral space 24 in such a state, when the concrete constituent material flows down in the spiral space 24, the spiral blade 12b
The concrete C is produced while being kneaded while flowing in such a state as to be cut.

The dam concrete C thus produced flows down the spiral space 24 and is received and stored in the popper station 16. 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 conveying method configured as described above, the weighed concrete constituent material is charged from the upper end side of the spiral space 24, and the charged concrete constituent material is rotated. Since the kneading is performed by flowing down the spiral space 24, there is no need to consider the occurrence of material separation due to the reloading of concrete.

Further, in the transportation method and the transportation apparatus of the present invention, the concrete manufacturing process for kneading the concrete constituent material and the transportation thereof can be performed simultaneously, and the mixer for kneading becomes unnecessary. Transportation costs can be greatly reduced.

[0028]

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 a detailed explanatory view of a chute type casting device of the concrete concrete transport device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Concrete plant 12 Short type casting device 12a Drum 12b Spiral blade 12c Rotation drive mechanism 14 Material supply part 16 Hopper station 18 Dam 20 Slope 22 Support material 24 Spiral space 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: Between the setting position, a chute type casting device provided with a spiral space along the slope is installed, concrete constituent materials weighed from the concrete plant are thrown in from the upper end side of the spiral space, Transporting dam concrete, characterized in that the input concrete constituent material is kneaded by flowing down the rotating spiral space, and the kneaded concrete constituent material is received at the lower end side of the spiral space. Method. 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. A chute-type casting device installed between the concrete plant and the chute-type casting device, and a concrete constituent material measured from the concrete plant is sent to the chute-type casting device. A material supply unit to be supplied, and a hopper station installed at a lower end side of the chute type casting device for receiving and storing the kneaded concrete constituent material; A cylindrical drum open at both ends, rotatably supported, and having an outer peripheral edge fixed inside the drum. A concrete concrete transportation device for dams, comprising: spiral blades forming a spiral space whose outer periphery is separated by the drum; and a rotary drive mechanism for the drum.