JP3480614B2 - Construction method at the border between adjacent construction zones when constructing a dam body - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a dam embankment.
The present invention relates to a construction method at the border between adjacent construction zones . 2. Description of the Related Art Conventionally, when constructing a dam embankment, concrete is transported to a construction site of the dam embankment by a dump truck, concrete is poured into the construction site, and then a predetermined thickness is applied by a bulldozer. Leveling and then compaction of the concrete by rollers. [0003] However, in the above-mentioned method, the work of flowing concrete to the construction site by the dump truck and the leveling work by the bulldozer are not performed.
Unless the dump truck or bulldozer is operated according to the situation at the site each time, it is difficult to secure the flatness of the concrete surface, and it is difficult to achieve unmanned quality control such as compaction. Therefore, for example, when constructing a sabo dam in an area where pyroclastic flow or debris flow may occur, it is desirable to finish construction in a short period of time, but in the conventional method it is necessary to arrange a large number of workers No. However, arranging a large number of workers is confusing at the time of evacuation, and endangers human lives. Therefore, only a small number of workers can be allocated, and the construction period cannot be shortened. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a method of constructing a dam embankment body that is advantageous in achieving unmanned operation and that can shorten the construction period. . [0004] In order to achieve the above object, the present invention provides a dam embankment on both sides in the width direction of a dam embankment construction site.
The outer wall is formed by extending in the length direction of the dam body,
Divide the embankment construction site into multiple sections along its length
And the inside of each section is concreted by a concrete finisher.
Leveling of REET, compaction by vibrating roller, and grease
Watering, curing and green cutting
Go to the lower concrete layer and upper concrete
A concrete layer consisting of a reed layer is formed sequentially to build a dam
In the construction method of the border part of the adjacent construction zone when building the body
There is a concrete finish from the construction area currently under construction.
Lower concrete layer so that the car can descend to the next section.
Up to the border with the next adjacent construction zone,
Apply the upper concrete layer to the part before the boundary.
And then add the concrete finisher to the next section
After moving to the end of the lower concrete layer,
P over the width direction by the backhoe placed in the construction section
Install the C block to create a PC block row, and then
In the construction area under construction,
On the lower concrete layer between the PC block rows,
Pour concrete with a hook and level it,
Of concrete layer up to PC block row
The upper concrete that has been formed up to the PC block row
Green cutting machine
Watering, curing and green cutting
Sign. [0005] [Effect] It is possible to efficiently perform the construction of the border between adjacent construction zones
And a concrete finisher to the next
And the green cutting machine can be moved easily, concrete layers can be formed efficiently in each of the divided dam embankment construction sites, and the construction period can be shortened. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a sabo dam constructed by the method of the present invention and its surroundings, and FIG. 2 is an explanatory view of a method of constructing a sabo dam. 1 is a sabo dam, which receives the pyroclastic flow and debris flow when they occur,
An overflow section 3 from which a pyroclastic flow or debris flow of a predetermined amount or more exits, and a sleeve portion 5 provided at each end of the overflow section 3 to guide the pyroclastic flow or debris flow to the overflow section 3 are provided. According to the invention, the overflow 3 is constructed. Reference numeral 7 denotes a batcher plant, and the batcher plant 7 is installed at a location away from the dam construction site. Reference numeral 9 denotes a relay hopper. The relay hopper 9 is disposed in the vicinity of a dam construction site, a belt conveyor 11 is connected to the relay hopper, and a car washing facility 13 is disposed in the vicinity of the relay hopper 9. When constructing the sabo dam 1, concrete is supplied to the overflow construction site at first. In the batcher plant 7, the RCD concrete whose temperature is controlled is put into the dump truck 15. Next, the dump truck 15 is moved to the downstream end of the belt conveyor 11 and concrete is charged. Thereby, the concrete is put into the relay hopper 9 via the belt conveyor 11. Then, concrete is put into the crawler dump 17 from the relay hopper 9 and transported to the dam construction site by the crawler dump 17. Before the crawler dump 17 enters the dam construction site, the undercarriage and the lower part of the vehicle are washed in the car wash facility 13. FIG. 3 to FIG. 5 are explanatory views showing the formation of a concrete layer in each section. Overflow part construction location,
The first section 21, the second section 22, and the third section 23 are divided at intervals in the longitudinal direction. Then, in the first section 21, outer walls 25 extending in the longitudinal direction of the overflow section 3 are formed at both sides in the width direction of the overflow section 3, respectively, and a boundary between the first section 21 and the second section 22 is formed. Overflow part 3 in part
An inner wall 27 extending in the width direction is formed. The outer wall 2
5 and the inner wall 27, as shown in FIG.
The crawler 9 is transported by the crawler dump 17 to the location where the overflow section 3 is constructed, and is linearly arranged by the backhoe 31, the slipform paper 33 and the like. In addition, overflow section 3
A concrete finisher 35, a vibrating roller 37, and a green cut machine 39 are carried into the construction location. In FIGS. 3 to 5, reference numeral 41 denotes an approach / exit path of the vehicle to the overflow portion 3 construction location, and the approach / exit path 41 is formed gradually higher as the concrete layers are stacked. Then, a concrete finisher 35 is disposed near the inner wall 27 of the first section 21, concrete is fed from the crawler dump 17 into a hopper portion of the concrete finisher 35, and the concrete finisher 35 and the crawler dump 17 are placed in the first section 21. Overflow part 3
As shown in FIG. 3, the ultra-hardened concrete is spread from the inner wall 27 to the first section 21 with a predetermined thickness and width while traveling in a straight line along the longitudinal direction. In this way, the concrete layer C having the predetermined thickness and width is
The above operation is repeated a plurality of times between the outer walls 25 on both sides, and the concrete layer C is formed on the entire first section 21. As shown in FIG. 3, while the concrete layer C is formed in the first section 21, the outer wall 25 is formed in the second section 22, and the concrete layer C is formed in the entire first section 21. Then, as shown in FIG. 4, the concrete layer C is formed from the inner wall 27 also in the second section 22 in the same manner as described above, and the above operation is repeated a plurality of times between the outer walls 25 on both sides. The concrete layer C is formed in the entire two sections 22. Then, as shown in FIG. 4, while the concrete layer C is formed in the second section 22, the green cutting machine 3 is placed in the first section 21.
Water is sprinkled on the surface of the concrete compacted by 9 to cure the concrete, then green cutting is performed, and an outer wall 25 is formed in the third section 23. When the concrete layer C is formed in the entire second section 22, as shown in FIG. 5, the concrete layer C is formed by the concrete finisher 35 in the same manner as described above, and between the outer walls 25 on both sides. The above operation is repeated a plurality of times, and the concrete layer C is formed in the entire third section 23. Then, while the concrete layer C is formed in the third section 23, in the second section 22, water is sprinkled on the concrete surface compacted by the green cut machine 39 to cure the concrete,
Green cut work is performed. In this embodiment, the concrete layer C is formed continuously at the boundary between the second section 22 and the third section 23 as follows. First, as shown in FIG. 7A, the lower concrete layer C1 is divided into the second section 22 and the third section.
It is formed up to the boundary with the construction zone 23. Then, the upper concrete layer C2 is formed up to the portion before the boundary so that the concrete finisher 35 can descend to the third section 23 side. Next, as shown in FIG.
After moving the concrete finisher 35 to the third section 23, the PC block 4 is attached to the end of the lower concrete layer C1 by the backhoe 31 over the width direction of the overflow section 3.
The PC block row 43 is made by installing the PC block 301. Next, as shown in FIG. 7 (C), the concrete is poured by the backhoe 31 on the lower concrete layer C1 between the end of the upper concrete layer C2 and the PC block row 43, and the concrete is scraped. You. Then, as shown in FIG. 7D, compaction is performed by the vibration roller 37, and watering, curing, and green cutting are performed by the green cutting machine 39. In this way, the concrete layer C at the boundary between the second section 22 and the third section 23 is formed. Therefore, the concrete layer C is formed by the concrete finisher 35 in the third section 23 as shown in FIG.
Is performed as a starting point. When the concrete layer C is formed in the entire first section 21 to the third section 23 as described above, the concrete layer C is formed on the concrete layer C in the first section 21 in the same manner as described above. And stacked, the first
While the concrete layer C is being stacked in the construction section 21, in the third construction section 23, the green cutting machine 39 is used.
Water is sprinkled on the compacted concrete surface to cure the concrete, and green cutting is performed. Then, concrete layers C are sequentially stacked from the first section 21 to the third section 23, and when the concrete layer C reaches a predetermined height, as shown in FIG.
While forming and stacking the concrete layer C in the third construction section 23, it is made to correspond to the concrete layer C to be stacked next,
The backhoe 31 is provided on the outer wall 25 and the inner wall 27 of the first construction section 21.
The outer wall 25 and the inner wall 2
Increase 7 Then, while the concrete is being stacked on the first construction section 21, the second and third construction sections 2
The PC block 29 is superimposed on the outer wall 25 of the third
To be higher. Also, at the boundary between the second section 22 and the third section 23, when the concrete layer C reaches a predetermined height, the PC block rows 43 are formed in the same manner as above to form the concrete layer C at the boundary. I will do it. Then, by repeating such operations, the overflow section 3 having a predetermined width, height, and length is constructed. According to the present embodiment , the boundary of the adjacent
The construction of the part is performed efficiently, and the concrete
Printer finisher 35, vibrating roller 33, green
The moving of the machine 39 is also easy, and the divided dam embankment
Efficient formation of concrete layers in order for each body construction site
The construction period can be shortened. Further, the concrete finisher 35 and the vibration roller 33 only move linearly, and the concrete finisher 35 and the vibration roller 33 easily ensure the flatness of the concrete surface,
Further, it is sufficient that the green cutting machine 39 also moves linearly on the concrete, so that it is possible to easily perform unmanned operation of these devices. And since the overflow section 3 can be constructed by unmanned operation, even if the overflow section 3 of the sabo dam 1 is constructed in an area where pyroclastic flow and debris flow may occur, without endangering human life The overflow section 3 can be constructed. The overflow section 3 is divided into a first section 21, a second section 22, and a third section 23 in the longitudinal direction, and the concrete layer C is formed for each section. The outer wall 25 is formed in the second section 22 while the concrete is spread and compacted in the first section 21. The first wall is formed while the concrete is spread and compacted in the second section 22. In addition to performing concrete curing and green cutting work in the construction section 21 and forming the outer wall 25 in the third construction section 23, it is possible to eliminate time loss and greatly reduce the construction period. As is apparent from the above description, according to the present invention, the construction at the boundary between adjacent construction sections can be performed efficiently.
Concrete finisher, vibrating row
La, green cutting machine can be easily moved and split
Concrete at each dam embankment construction site
A layer can be formed, and the construction period can be shortened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view of a sabo dam constructed by the method of the present invention and its periphery. FIG. 2 is an explanatory view of a method for constructing a sabo dam. FIG. 3 is an explanatory diagram for forming a concrete layer for each section. FIG. 4 is an explanatory view of forming a concrete layer for each section. FIG. 5 is an explanatory view of forming a concrete layer for each section. FIG. 6 is an explanatory diagram of a method of constructing an outer wall. FIGS. 7A to 7E are explanatory views of forming a concrete layer at a boundary between a second section and a third section. [Description of Signs] 1 Sabo dam 3 Overflow section 15 Dump truck 17 Crawler dump 21 First section 22 Second section 23 Third section 35 Concrete finisher 37 Vibration roller 39 Green cut machine

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-6-250590 (JP, A) JP-A-5-33323 (JP, A) JP-A-5-17923 (JP, A) JP-A-5-17923 118136 (JP, A) Jingu 4-34172 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02B 7/00 E04G 21/02

Claims (1)

(57) [Claims] [Claim 1] Both sides in the width direction of the dam embankment construction site
Extending in the length direction of the dam embankment to form an outer wall,
The dam embankment construction site is divided into multiple sections along its length.
Divide each section and use a concrete finisher to
Leveling of concrete, compaction by vibrating rollers, and
Watering, curing and green cutting by lean-cut machine
And the lower concrete layer and upper concrete
Concrete layers consisting of concrete layers are sequentially formed and
Construction method at the border between adjacent construction zones when constructing a bank
The concrete finisher from the construction area currently under construction
Adjoin the lower concrete layer so that you can get down to the construction section.
To the next construction zone, and
The concrete layer is formed up to the part before the boundary
And, then, move the concrete finisher to the next work area
After that, at the end of the lower concrete layer, place it in the next section
PC block over the width direction by the backhoe
To make a PC block row, then the upper concrete layer in the construction area currently under construction
Concrete layer between the edge of the PC and the row of PC blocks
Pour concrete with a backhoe on top
And form the upper concrete layer up to the PC block row
And, finally, the upper Conch formed to PC block row
The reed layer is compacted with a vibrating roller,
Adjacent construction area when constructing a dam embankment characterized by watering, curing, and green cutting by Shin
Construction method at the border.