JP2993580B2 - Transportation method of dam concrete - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting dam concrete.

[0002]

2. Description of the Related Art Conventionally, as a method of transporting dam concrete, various transport methods have been adopted according to construction conditions. Among these various types of dam concrete transportation methods, in the RCD method (Roller Compacted Dam), the ready-mixed concrete manufactured at the batcher plant is transported to a casting site by a concrete transport vehicle. The ready-mixed concrete is discharged while running on the casting site, and the discharged ready-mixed concrete is sequentially compacted by rollers.

[0003] When a concrete transport vehicle is used in this RCD method, it is not usually constructed by the same method up to the upper end of the dam. Becoming
If the width of the casting place becomes narrow and the concrete transport vehicle cannot enter, (in FIG. 2, a dam upper part D1 indicated by a dashed line is constructed on the current concrete placing place F. In such a case) the properties of the ready-mixed concrete itself are also changed to a different on-column construction method, etc., and at the end point of the high-slope path 33 in FIG. Lift vertically to a predetermined height,
Thereafter, the sheet is conveyed to a predetermined casting location in the horizontal direction.

[0004]

However, in the conventional method described above, very efficient transportation can be performed at the stage where the concrete transport vehicle can directly enter the casting site, but the fresh concrete is lifted and transported using a bucket. If it is necessary to do so, the transport cycle time becomes extremely long, and there is a problem that the transport efficiency is reduced.

That is, when constructing a dam, the concrete placement site changes sequentially over a long distance. Therefore, when the transport position of the bucket transport device is fixed, the bucket is lifted with a crane and the place where the bucket is lifted. The bucket must be removed from the crane and the bucket must be transported to the intended placement site by appropriate means. This is because the position must be moved each time.

Accordingly, the present invention has been made to solve the above-mentioned problems, and a conventional method of transporting ready-mixed concrete to a lower part or a middle part of a dam construction site by a concrete transport vehicle and lifting it with a crane after a certain dam construction stage. In contrast, dam concrete that once transports ready-mixed concrete by a concrete transport vehicle to a location above the dam construction site, and from that location can use a transferer and a cable crane to efficiently transport the ready-mixed concrete using buckets to any placement location The purpose of the present invention is to provide a transfer method of the above.

[0007]

SUMMARY OF THE INVENTION In accordance with the above objects, the construction of the present invention, which has the features set forth in the appended claims, aims to solve the above-mentioned problems by casting concrete from a batcher plant 1 at a dam construction site. An intrusion path 3 through which the concrete transport vehicle 2 can enter is provided to the place F, and from the beginning of the dam construction to a predetermined construction stage, the ready-mixed concrete manufactured in the batcher plant 1 is concreted using the intrusion path 3. A pair of rails are transported by the transport vehicle 2 directly to the placement site F, and the fixed tower 41 is stretched on one of the right bank and the left bank of the dam D to be completed, and the rail 43 is stretched on the other. Towers 42, 42 are provided, and fixed tower 41 and
A cable crane 40 is provided above the dam D to be completed across the traveling body 44 that is guided and moved by the moving body 44. From a predetermined dam construction stage, the ready-mixed concrete manufactured by the batcher plant 1 is provided. Is transported by the concrete transport vehicle 2 to the starting position of the bunker line 47 of the cable crane 40, and the bunker line 47 has a plurality of hoppers 52
And a transferer 50 provided with a concrete discharge mechanism 53 and a bucket landing sensor 54 each of which is provided with a bottom opening / closing lid 55 in each hopper 52 is run at the starting point of the bunker line 47. From the concrete carrier 2 to the transferer 5
0 is loaded in each hopper 52, and the transferer 50 travels on the bunker line 47, and the bucket 4 suspended by the cable crane 40.
8 to bucket yard 45 and bucket yard 4
The transferer 50 is slowed down at the five positions, the bucket landing sensor 54 detects the landing of the bucket 48, performs positioning to stop the progress, and the concrete discharge mechanism 53 of the hopper 52 that has been positioned operates. The ready-mixed concrete in the hopper 52 is loaded into the bucket 48,
Then, the bucket 4 is moved by the cable crane 40.
In this embodiment, technical means for transporting the ready-mixed concrete to the casting place F is adopted.

[0008]

Therefore, the method for transporting dam concrete according to the present invention comprises a pair of track towers in which a fixed tower 41 is stretched on one side of the right bank and left bank of the dam D to be completed and a rail 43 is stretched on the other side. 42, 42, a dam D to be completed over the fixed tower 41 and a traveling body 44 guided and moved by a rail 43.
, The bucket 48 can be transferred to any position in the moving range of the cable crane (the area of the fan surrounded by the dashed line in FIG. 1). Has a function of directly transporting the ready-mixed concrete in the bucket 48 to the position above the casting place F.

Although the method of the present invention requires the operation of loading the ready-mixed concrete into the bucket 48 via the transferer 50, the operation of the transferer 50 and the cable crane 40 can be automatically performed by the prior art. Therefore, as compared with the work that requires labor, such as changing the bucket 48 or changing the lifting position of the crane or the like, the present invention has the effect of ensuring labor saving and work safety.

Further, according to the method of the present invention, since the hopper 52 is of a double type, the loading capacity of the concrete transport vehicle 2 and the loading capacity of the transferer 50 can be matched, so that the concrete transport vehicle 2 is most rational. In addition, since the transferer 50 is provided with the bucket landing sensor 54 and the concrete discharging mechanism 53 for each hopper 52, the fresh concrete can be transferred to the plurality of buckets 48 by one reciprocating movement of the transferer 50. They can be supplied sequentially and exhibit the effect of increasing the transport efficiency.

[0011]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. In the figure, D is a dam under construction, and 1 is a batcher plant. An intrusion path 3 is provided from the batcher plant 1 to the concrete placing site F at the dam construction site, where the concrete carrier 2 can get in.

Conventionally known batcher plant 1, concrete carrier 2, and intrusion path 3 are used. From the beginning of dam construction to a predetermined construction stage, the ready-mixed concrete produced in the batcher plant 1 is transferred to the intrusion path. It is the same as in the prior art that the concrete transport vehicle 2 is used to transport directly to the placement site F using the concrete transport vehicle 3.

In the illustrated example, as shown in FIGS. 2 and 3, the concrete carrier 2 supports the rear end of the loading platform 21 with a shaft 22 at a high position.
With the rotating shaft as a rotation axis, the front end side of the bed 21 is raised by the multi-stage cylinder 23 to discharge the ready-mixed concrete in the bed 21 from the rear end discharge port 24, and the discharge port 24 is set at a high position. The outlet 24 is branched into two parts, because ready-mixed concrete can be directly supplied to two hoppers 52, 52 of a transferer 50 described later. The transfer of the ready-mixed concrete to the transferer 50 by the concrete transport vehicle 2 is performed at the stage when the construction of the dam D has progressed. Until that time, the concrete transport vehicle 2 shown in FIG. A normal dump truck or the like may be used.

It is a matter of course that one end of the intrusion path 3 communicates with the batcher plant 1 constructed at a position corresponding to the middle stage of the dam D to be completed normally. The other end is a low slope road 31, a middle slope road (which may be a horizontal road) 32, and a high slope road 33 in the drawing.
The low slope road 31, the middle slope road 32, the high slope road 33, and the like may be provided by branching as many as necessary, and only two are provided, and one is alternately constructed on a higher slope. It may be done again.

The method of directly transporting the ready-mixed concrete to the pouring place F by the concrete transport vehicle 2 is the conventional R
There is no difference from the CD method, and the concrete transport vehicle 2 gets on the casting site F (see FIG. 2) and discharges the ready-mixed concrete while traveling on the casting site F. Are successively compacted by a roller or the like (not shown), and this concrete casting is sequentially stacked upward with a predetermined thickness.

A fixed tower 41 is provided on one of the right bank and the left bank of the dam D to be completed, and a pair of track towers 42, 42 having a rail 43 stretched on the other side, are provided. The cable crane 40 located above the dam D to be completed extends between the cable 41 and the traveling body 44 guided and moved by the track 43.
Is provided.

The cable crane 40 is a conventionally known cable crane. A traveling body 44 is guided by a rail 43 extending between the two track towers 42, 42, and the space between the two track towers 42, 42 is not shown. The fixed tower 41 can be driven by a driving device.
A bunker line 47 and a bucket yard 45 are provided between the vehicle and the traveling body 44 as in the conventional case.

The bunker line 47 and the bucket yard 45 are provided at the same height position as the upper end portion of the dam D to be completed normally, and the rail 46 as shown in FIG. And a part of the bunker line 47 is constructed.
Uses the low step portion of the bunker line 47. In addition,
It is desirable that the cable crane 40, the bunker line 47, and the bucket yard 45 be installed early in the dam construction stage.

From a predetermined dam construction stage, the ready-mixed concrete produced in the batcher plant 1 is transferred to the cable crane 40 by the concrete carrier 2.
To the starting position of the bunker line 47. Note that the starting point of the bunker line 47, which is the destination of the concrete transport vehicle 2, is usually at a position where the bunker line 47 is not inclined and the height position thereof substantially coincides with the upper end of the dam D to be completed. However, a road 34 different from the intrusion path 3 (it is of course possible to share a part thereof) is used.

In the bunker line 47, a plurality of hoppers 52, 52 are juxtaposed in the traveling direction on a bogie 56, and a concrete discharge mechanism 53 and a bucket landing sensor are provided on each hopper 52. 54 are provided so that the transferer 50 provided with each of them travels.

The transfer carrier 50 is provided with a single hopper 52, so that the load capacity of the transfer carrier 50 is increased in order to match the load capacity of the concrete carrier 2 with one load. In order to match the loading capacity of the bucket 48 described later, one hopper 52 whose storage capacity matches the capacity of the bucket 48.
Are provided (two in the embodiment).

The transferer 50 is provided with a plurality of hoppers 52 on a carriage 56 having wheels 51 on the lower surface, as shown most clearly in FIG. 4 and FIG.
Each hopper 52 is provided with a concrete discharging mechanism 53 for opening and closing a bottom opening / closing lid 55 and a bucket landing sensor 54, and has a driving device 58 so as to run on rails 46 by itself.

As the concrete discharging mechanism 53 and the bucket landing sensor 54, those known per se can be used.
5 can be opened and closed by the lid driving device 59, the bucket landing sensor 54 uses a reflection type position detection device,
The bucket 48 may be provided with a reflection plate 49.

Then, at the starting point of the bunker line 47, the ready-mixed concrete is loaded into the hoppers 52, 52 of the transfer car 50 from the concrete carrier 2.

The most efficient way of loading the ready-mixed concrete from the concrete carrier 2 to the transferer 50 is to allow the ready-mixed concrete to be directly supplied to the transferer 50 from the concrete carrier 2. As shown most clearly in FIG. 2, the leading end of the discharge port 24 is adapted to the hoppers 52, 52, and is branched.
By raising the front end side of 1 by the multi-stage cylinder 23, the raw concrete discharged from the discharge port 24 falls into both hoppers 52 of the transferer 50.

Then, the transfer car 50 travels on the bunker line 47 and proceeds to a bucket yard 45 of a bucket 48 suspended by the cable crane 40.
, The bucket landing sensor 54 detects the landing of the bucket 48 and performs positioning to stop the progress, and the concrete discharge mechanism 5 of the hopper 52 that has been positioned.
3 operates to load the ready-mixed concrete in the hopper 52 into the bucket 48. Note that a chute 57 extending above the bucket 48 is provided at the bottom of the hopper 52,
The ready-mixed concrete discharged from the hopper 52 is guided by the chute and is put into the hopper 48. Although not shown in the drawing, a vibration device is attached to the chute 57 to ensure that the ready-mixed concrete falls.

In the same manner as in the prior art, the transferer 50 is automatically operated. The traveling position of the traveling body 44 of the cable crane 40 (this traveling position is determined by the rotational speed of a driving device (not shown) of the traveling body 43). Is calculated, the bucket landing position (where in the vertical direction in the bucket yard 45 in FIG. 1 the bucket 48 will land) is calculated. In addition, this calculation is performed at the same time as to which position between the traveling body 44 and the fixed tower 41 the bucket 48 is moved at the traveling position of the traveling body 43, in other words, between the bucket landing position and the concrete placing place. Find the distance. Then, the transferer 5 reaches the bucket landing position.
0 (the traveling distance of the transferer 50 is detected by a mounted wheel tachometer or the like). However, in actual automatic operation, the balance of the bucket 48 suspended at the time of landing on the floor becomes out of order. It is rather rare that the floor is accurately landed at the calculated position, and the transferer 50 loaded with ready-mixed concrete is heavy and dangerous to stop suddenly, and it is difficult to perform accurate stop positioning. Pause or slow down before the obtained landing position, and when the bucket landing sensor 54 detects the bucket 48 during slow down or slow down after the temporary stop, the advance of the transferer 50 is automatically stopped. .

Further, when the ready-mixed concrete in the hopper 52 on the leading side in the traveling direction has been supplied to the bucket 48, and the next bucket 48 has landed, the transferer 50 is made to advance slowly again, and the rear side in the traveling direction. Hopper 52
May be adjusted to the bucket landing position, but if the traveling body 44 is moved halfway, the transfer car 50 may move backward to perform the alignment as necessary.

Next, the ready-mixed concrete in the bucket 48 is transported to the casting place F by the cable crane 40. The operation of the cable crane 40 may be performed by a conventional method. Normally, the operation is controlled together with the transferer 50 to raise and lower the bucket 48, and to suspend the bucket 48 between the fixed tower 41 and the traveling body 44 while suspending the bucket 48. Can be moved back and forth. The bucket 48 is stopped at a predetermined height above the casting place F, and the bottom (not shown) of the bucket 48 is opened to drop the fresh concrete and the concrete is poured into a target place. Can be used.

It is to be noted that the transferer 50 is run on the bunker line 47 and the bucket 48 is hung on the cable crane 40, as described above. For the purpose of transporting various materials, transfer
It goes without saying that there is no problem if another truck is run instead of 0 and another suspension device is used instead of the bucket 48.

[0031]

The present invention is as described above, and the batcher plant of the RCD method can be used as it is without relocating or providing two places, and ready-mixed concrete can be transferred to the concrete carrier 2, transferer 50, cable crane 40. It is possible to provide a method for transporting dam concrete that can be efficiently transported to a target placing site by using the method.

In particular, according to the present invention, the transfer of the ready-mixed concrete from the concrete carrier 2 to the transfer car 50 and from the transfer carrier 50 to the cable crane 40 can be substantially automated. Since the transfer hopper 50 is provided with a plurality of hoppers 52, 52, it is possible to simply discharge the ready-mixed concrete from the concrete carrier, and it is not necessary for a conventional worker to change buckets.
It is possible to provide a method for transporting dam concrete, which can easily transport ready-mixed concrete with a small number of workers.

Further, according to the present invention, the change of the driving place can be dealt with by the operation of the cable crane 40, and the moving distance of the bucket 48 which requires the longest transport time becomes shorter. The travel distance in the direction is
By only slightly lifting and lowering at the bucket yard 45 site and raising and lowering from above the dam D at the casting place, the transport time of the bucket 48 can be extremely shortened compared to the conventional method, and the transport cycle time can be shortened, An object of the present invention is to provide a method for transporting dam concrete, which has a remarkable effect on shortening the construction period of dam construction.

[Brief description of the drawings]

FIG. 1 is a plan view of a dam construction site being constructed according to the method of the present invention.

FIG. 2 is a partial cross-sectional rear view of a state in which the concrete carrier used in the present invention has been put into a concrete setting place and is set.

FIG. 3 is a side view showing a state in which ready-mixed concrete is loaded onto a transferer from a concrete carrier used in the present invention.

FIG. 4 is a front view of a transferer used in the present invention.

FIG. 5 is a side view showing a state in which ready-mixed concrete is loaded into a bucket from a transferer used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Batcher plant 2 Concrete transport vehicle 3 Intrusion path D Dam F Placing place 40 Cable crane 41 Fixed tower 42 Track tower 47 Bunker line 48 Bucket 50 Transfer car 52 Hopper 53 Concrete discharge mechanism 54 Bucket landing sensor 55 Bottom opening / closing lid 56 carts

Claims (1)

(57) [Claims] An intrusion path (3) through which a concrete carrier (2) can enter is provided from a batcher plant (1) to a concrete placement site (F) at a dam construction site. Until the construction stage, the ready-mixed concrete produced in the batcher plant (1) is transported directly to the casting site (F) by the concrete transport vehicle (2) using the intrusion path (3), and will be completed. A fixed tower (41) is provided on one of the right bank side and the left bank side of the dam (D), and a pair of rail towers (42, 42) having a rail (43) stretched on the other side thereof. A cable crane (40) located above the dam (D) to be completed is provided over the fixed tower (41) and the traveling body (44) guided and moved by the track (43). From the dam construction stage, the above batcher plant The ready-mixed concrete produced in (1) is transported to the starting position of the bunker line (47) of the cable crane (40) by the concrete transport vehicle (2), and the bunker line (47) is placed on a bogie (56). A plurality of hoppers (52, 52) are juxtaposed in the traveling direction, and each hopper (52) is provided with a concrete discharge mechanism (53) for opening and closing a bottom opening / closing lid (55) and a bucket landing sensor (54), respectively. Transferr (50) which becomes
At the starting point of the bunker line (47), ready-mixed concrete is loaded into each hopper (52) of the transfer car (50) from the concrete carrier (2), and the transfer car (50) Is the bunker line (4
7) The vehicle travels up to the bucket yard (45) of the bucket (48) suspended by the cable crane (40). At the bucket yard (45), the transferer (50) is slowly moved to arrive at the bucket. The floor sensor (54) detects the landing of the bucket (48) and performs positioning for stopping the progress, and the concrete discharging mechanism (53) of the hopper (52) that has been positioned operates to operate the hopper (52). ) Is loaded into the bucket (48), and then the concrete transported in the bucket (48) is transported by the cable crane (40) to the casting place (F). Method.