JP2001348843A - Method of transporting concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform separation of materials and reduce the cost of transportation. SOLUTION: A cylindrical chute 14 has a cylindrical casing 14a with both ends open and resistant vanes 14b with their outer periphery edges fixed into the casing 14a. The casing 14a is extended along a slope 20 from around a concrete planet 10 to a placement position at the lower end of the slope 20, with its opening at the upper end being located near a concrete carry-in device 12. The resistant vanes 14b are a plurality of plate materials having widths almost 1/2 the diameter of the casing 14a, which are turned, in this case, about 1/2 around the inner periphery of the casing 14a. A member constituting each resistant vane 14b has upper and lower faces bent to be twisted downward for constituting part of the spiral. A concrete C charged into the casing 14a, when flowing down, comes into contact with the resistant vanes 14b, whereupon it flows along the bent face thereof while swirling in a spiral form.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transporting concrete, and more particularly to an improved technique 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. Transportation to the location 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 driving position 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 method for transporting concrete has the following problems.

[0006]

That is, in the method of transporting concrete by a belt conveyor, concrete is transshipped a plurality of times, and as the number of transshipments increases, material separation may occur. It takes time and effort to re-knead.

In the transportation method using a cable crane or an incline, since the equipment itself is expensive, the transportation cost of concrete increases.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a concrete transportation method that does not cause material separation and that can reduce transportation costs. Is to provide.

[0009]

In order to achieve the above object, the present invention relates to a method for transporting concrete from an upper end side to a lower end side of a slope, comprising a resistance wing that spirally turns and flows down. The tubular chute was placed along the slope, concrete was introduced from the upper end side of the tubular chute, and the introduced concrete was caused to flow spirally along the resistance blade.

According to the concrete conveying method configured as described above, concrete is caused to flow down while being spirally swirled in the cylindrical chute, so that material separation is reduced.

[0011] The vertical transportation of concrete is as follows.
Since the drop is performed by gravity, transportation costs can be reduced.

The method for transporting concrete according to the present invention is applied to the construction of a dam. A concrete plant is installed at the upper end of the slope and near the top end of the dam to be built, and the concrete plant is installed at the lower end of the slope. A method for transporting concrete toward a concrete placement position, wherein the tubular chute is installed between the concrete plant and the placement position, and the concrete discharged from the concrete plant is filled with the cylindrical chute. From the top end of the
The dropped concrete can be received at the lower end of the cylindrical chute.

[0013]

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 one embodiment of the method for transporting concrete according to the present invention.

These figures illustrate a case where the transportation method according to the present invention is applied to construction work of a dam. FIG. 1 shows an overall layout of a transportation device used in the transportation method of the present embodiment. The transporting device shown in FIG. 1 includes a concrete plant 10, a concrete loading device 12, a tubular 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 having both ends opened.
a, and a resistance wing 14b having an outer peripheral edge fixed in the casing 14a.

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

The casing 14a is provided with the supporting 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 wings 14b are a plurality of plate members having a width approximately half the diameter of the casing 14a. In this embodiment, the resistance wings 14b are provided so as to make approximately half the inner circumference of the casing 14a. Have been.

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 configured 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 concrete C using the transport device having the above-described configuration will be described. When transporting the 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 passes through the concrete loading device 12 and 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 position.

According to the concrete conveying method configured 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.

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

[0029]

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

[Brief description of the drawings]

FIG. 1 is an overall layout view of a transportation device used in a method for transporting concrete 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 used in the method for transporting concrete according to the present invention.

FIG. 4 is an explanatory plan view of a cylindrical chute used in the method for transporting concrete according to the present invention.

[Explanation of symbols]

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

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[Procedure amendment]

[Submission date] September 7, 2001 (2001.9.7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

In order to achieve the above object, the present invention relates to a method for transporting concrete from an upper end side to a lower end side of a slope, comprising a resistance wing that spirally turns and flows down. A tubular chute is installed along the slope, concrete is poured from the upper end side of the tubular chute, and the supplied concrete is spirally turned along the resistance wing while the lower end side of the cylindrical chute.
It was made to flow down .

Claims (2)

[Claims] 1. A method for transporting concrete from an upper end side to a lower end side of a slope, comprising: installing a cylindrical chute provided with resistance wings for spirally turning and flowing down along the slope; Insert from the upper end of the cylindrical chute,
A method for transporting concrete, wherein the introduced concrete is spirally flowed down along the resistance blade. 2. The concrete transportation method according to claim 1, which is applied to a construction of a dam, wherein a concrete plant is installed at an upper end side of the slope and near a top level of the dam to be constructed, and A method for transporting concrete toward a concrete placement position on the lower end side of the concrete plant, wherein the cylindrical chute is installed between the concrete plant and the placement position, and the concrete discharged from the concrete plant is A method for transporting concrete, characterized in that concrete poured in from the upper end of the cylindrical chute and flowing down is received at the lower end of the cylindrical chute.