JP3454291B2 - Construction method of concrete structure - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for constructing a concrete structure.

[0002]

2. Description of the Related Art As a concrete structure of a predetermined length constructed by stacking concrete layers, for example,
A dam bank is mentioned. Conventionally, dam dams are constructed by transporting concrete to a dam dam construction site by a dump truck, pouring the concrete to the site, then leveling it to a predetermined thickness with a bulldozer, and then rolling the concrete with rollers. The work of compacting is done. However, in the method as described above, the work of pouring concrete to the construction site by the dump truck and the leveling work by the bulldozer are
It is necessary to operate the dump truck and the bulldozer according to the situation of the site each time, work efficiency is poor, and the work period cannot be shortened. Therefore, it is conceivable to form a concrete layer using a concrete finisher and construct a dam bank body by stacking such concrete layers. On the other hand, the dam body is huge, and the distance that the dam body extends in a straight line is large. Therefore, it is difficult to form the concrete layer over the entire length of the concrete finisher by running the concrete finisher once.

[0003]

Therefore, it is conceivable to divide the dam bank construction site along the longitudinal direction and form a concrete layer for each of the divided work sections. However, when a concrete layer is formed by running the concrete finisher, as shown in FIG. 8, when the concrete layer C is piled up, the concrete finisher 3
A gentle slope 5 so that 5 can move to adjacent construction area A
1 must be formed in advance. When the concrete layer C is formed in the adjacent work area A, stacking the concrete layer C on the slope 51 causes a problem from the viewpoint of the adhesiveness of the concrete layer C.
Work to remove the part is required, which is disadvantageous in improving work efficiency. The present invention has been devised in view of the above circumstances, and an object of the present invention is to concretely construct a concrete structure of a predetermined length using a concrete finisher, and to reduce the construction period. It is to provide a construction method.

[0004]

[Means for Solving the Problems] To achieve the above object, the present invention provides a method of stacking concrete layers to construct a concrete structure having a predetermined length, up to an intermediate point in the longitudinal direction of the concrete structure constructing point. Run the concrete finisher to form the lower concrete layer,
Then, run a concrete finisher on the lower concrete layer to form an upper concrete layer on the lower concrete layer up to the point before the middle point, and then a concrete finisher, where the upper and lower concrete layers are not formed. Move to the remaining part of the concrete structure construction position in the longitudinal direction, then face the end of the lower concrete layer, and arrange the blocks in a direction substantially orthogonal to the longitudinal direction of the concrete structure to form a block row,
Then, concrete is poured onto the lower concrete layer between the upper concrete layer and the block row and is evened to form a flat concrete layer up to the midway point, and then the longitudinal direction of the concrete structure construction point. After forming a lower concrete layer from the block row by running the concrete finisher at the remaining places, and after forming the lower concrete layer at the remaining place, run the concrete finisher from the block row above the lower concrete layer It is characterized in that an upper concrete layer is formed on the top. Further, the present invention is characterized in that a plurality of the upper and lower concrete layers are provided in a direction orthogonal to a longitudinal direction of a concrete structure constructing site.
Further, the present invention is characterized in that the concrete structure is a dam bank body.

[0005]

[Operation] At the boundary between the first and second construction sections,
The concrete layer can be efficiently formed without any problem in adhesiveness. Therefore, the concrete structure can be efficiently constructed using the concrete finisher, and the construction period can be significantly shortened.

[0006]

Embodiments 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 diagram of a sabo dam construction method. 1 is a sabo dam, and the sabo dam 1 receives these flows when pyroclastic flows and debris flows occur,
Further, it is composed of an overflow portion 3 through which a pyroclastic flow or debris flow exceeding a predetermined amount flows out, and sleeve portions 5 provided at both ends of the overflow portion 3 to guide the pyroclastic flow or debris flow to the overflow portion 3, The overflow section 3 is constructed by the present invention. 7 is 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, which is arranged near the dam construction site, a belt conveyor 11 is connected to the relay hopper, and a car washing facility 13 is arranged near the relay hopper 9.

When the sabo dam 1 is constructed, concrete is supplied to the construction site of the overflow section by first loading the temperature-controlled RCD concrete into the dump truck 15 in the batcher plant 7. Next, the dump truck 15 is made to travel to the downstream end of the belt conveyor 11 to add concrete. 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 is 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.

3 to 5 are explanatory views for forming a concrete layer for each work section. The location of the overflow section is
It is divided into a first work section 21, a second work section 22, and a third work section 23 at intervals in the longitudinal direction. Then, in the first work 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 the boundary between the first work section 21 and the second work 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 dump 17 transports the sheet 9 to the construction site of the overflow section 3, and is arranged in a straight line by the backhoe 31, the slip foam paper 33 and the like. In addition, overflow section 3
The concrete finisher 35, the vibrating roller 37, and the green cut machine 39 are carried into the construction site. In FIGS. 3 to 5, reference numeral 41 denotes a vehicle entry / exit path to / from the overflow section 3 construction site, and the entry / exit path 41 is formed to be gradually higher as the concrete layers are stacked.

Then, a concrete finisher 35 is arranged near the inner wall 27 of the first work section 21, concrete is put into the hopper portion of the concrete finisher 35 from the crawler dump 17, and the concrete finisher 35 and the crawler dump 17 are placed in the first work section 21. Overflow section 3
While traveling linearly along the longitudinal direction, as shown in FIG. 3, super hard concrete is spread from the inner wall 27 to the first work area 21 with a predetermined thickness and width. In this way, the concrete layer C having a predetermined thickness and width is the first work section 21.
Is formed in a straight line, and the work is repeated a plurality of times between the outer walls 25 on both sides to form the concrete layer C on the entire first work section 21.

As shown in FIG. 3, while the concrete layer C was being formed in the first section 21, the outer wall 25 was formed in the second section 22, and the concrete layer C was 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 work section 22 in the same manner as described above, and the work is repeated a plurality of times between the outer walls 25 on both sides. The concrete layer C is formed on the entire second work area 22. Then, as shown in FIG. 4, while the concrete layer C is being formed in the second work section 22, the green cutting machine 3 is provided in the first work section 21.
The surface of the concrete compacted by 9 is sprinkled with water to cure the concrete, and then the green cutting work is performed, and the outer wall 25 is formed in the third work section 23.

When the concrete layer C is formed on the entire second work area 22, as shown in FIG. 5, the concrete layer C is formed by the concrete finisher 35 as shown in FIG. The above work is repeated a plurality of times to form the concrete layer C on the entire third work section 23. Concrete layer C in third section 23
In the second work section 22, water is sprayed on the concrete surface compacted by the green cut machine 39 to cure the concrete in the second construction section 22, and the green cut work is performed.

At the boundary between the second work section 22 and the third work section 23, in this embodiment, the concrete layer C is continuously formed as follows. First, FIG.
As shown in (A), the lower concrete layer C1 is
The boundary area between the work area 22 and the third work area 23 is formed. Then, the upper concrete layer C2 is formed up to a portion before the boundary portion so that the concrete finisher 35 can descend to the third work area 23 side. Next, FIG. 7 (B)
After the concrete finisher 35 is moved to the third work section 23, the PC block 4301 is installed at the end of the lower concrete layer C1 by the backhoe 31 across the width of the overflow section 3 as shown in FIG. Make a row 43. Next, as shown in FIG. 7 (C), concrete is placed 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 scraping is leveled. You Then, as shown in FIG. 7D, the vibrating roller 37 is used for compaction, and the green cutting machine 39 performs water spraying, curing, and green cutting. In this way, the concrete layer C at the boundary between the second work section 22 and the third work section 23 is formed. Therefore, the third
Formation of the concrete layer C by the concrete finisher 35 in the work area 23 is performed by using the PC as shown in FIG.
The block sequence 43 is performed as a starting point.

In this way, if the concrete layer C is formed over the entire first to third work sections 21 to 23, the concrete layer C is formed on the concrete layer C of the first work section 21 as described above. First stacked
While the concrete layers C are being stacked in the work area 21, in the third work area 23, the green cutting machine 39
Water is sprinkled on the compacted concrete surface to cure the concrete, and green cutting work is performed.

Then, the concrete layers C are sequentially stacked from the first work section 21 to the third work 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 work area 23, the concrete layer C is made to correspond to the next concrete layer C,
Backhoe 31 on outer wall 25 and inner wall 27 of the first construction section 21
PC block 29 is piled up by these outer wall 25 and inner wall 2
Increase 7 Then, while the concrete is being stacked in the first work section 21, the second and third work sections 2 are
PC block 29 is overlapped on the outer wall 25 of 3
To increase. Further, at the boundary portion between the second work area 22 and the third work area 23, when the concrete layer C reaches a predetermined height, the PC block row 43 is formed in the same manner as above to form the concrete layer C at the boundary area. I will do it. Then, the overflow portion 3 having a predetermined width, height and length is constructed by repeating such work.

According to this embodiment, the overflow section 3 is partitioned in the longitudinal direction into the first work section 21, the second work section 22, and the third work section 23, and the concrete finisher 3 is divided for each work section.
5 was run to form a concrete layer C. Then, in particular, at the boundary between the second work section 22 and the third work section 23, the upper concrete layer C2 is formed up to a position before the boundary section, and the end of the lower concrete layer C1 is exposed to the PC. The block row 43 is made, and concrete is placed on the lower concrete layer C1 between the end portion of the upper concrete layer C2 and the PC block row 43 and scraped, whereby the end portion of the second work section 22 is finished. I tried to make a flat concrete surface. Therefore, the concrete finisher 35 can be used to efficiently stack the concrete layers C over the second and third work sections, and the overflow section 3 having no problem in adhesion can be efficiently constructed.
The construction period can be greatly shortened.

Although the concrete structure is the overflow portion 3 of the sabo dam 1 in the embodiment, the concrete structure in the present invention means a ground, a road, etc.
It includes a wide range of structures constructed of concrete such as other various civil engineering structures and building structures.

[0017]

As is apparent from the above description, according to the present invention, there is no problem in the adhesiveness at the boundary between the first work section and the second work section where the concrete layer is formed using the concrete finisher. You can stack concrete layers efficiently. Therefore, a concrete structure having a predetermined length can be efficiently constructed by using the concrete finisher, and the construction period can be significantly shortened, which is particularly suitable for constructing a dam bank body.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a sabo dam constructed by the method of the present invention and its surroundings.

FIG. 2 is an explanatory diagram of a method of constructing a sabo dam.

FIG. 3 is an explanatory diagram of forming a concrete layer for each work section.

FIG. 4 is an explanatory diagram of forming a concrete layer for each work section.

FIG. 5 is an explanatory diagram of forming a concrete layer for each work section.

FIG. 6 is an explanatory diagram of a method of constructing an outer wall.

7 (A) to 7 (E) are explanatory views of forming a concrete layer at the boundary between the second work section and the third work section.

FIG. 8 is an explanatory diagram of forming a concrete layer using a concrete finisher.

[Explanation of symbols]

1 Sabo dam 3 Overflow section 5 sleeves 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 43 PC block row

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-250590 (JP, A) JP-A-3-206201 (JP, A) Jikken 4-31313 (JP, Y2) (58) Field (Int.Cl. ⁷ , DB name) E02B 7/00 E01C 19/48 E04G 21/02

Claims (3)

(57) [Claims] 1. When stacking concrete layers to construct a concrete structure of a predetermined length, a concrete finisher is run to a point in the longitudinal direction of the concrete structure construction location to form a lower concrete layer, and , A concrete finisher is run on the lower concrete layer to form an upper concrete layer on the lower concrete layer up to the point before the middle point, and then a concrete finisher is formed on the concrete without the upper and lower concrete layers. Move to the remaining location in the longitudinal direction of the structure construction location, then facing the end of the lower concrete layer, to form a block row by arranging the blocks in a direction substantially orthogonal to the longitudinal direction of the concrete structure, The lower component between the upper concrete layer and the block row Pour concrete over the reed layer and stir to form a flat concrete layer up to the midway point, and then run the concrete finisher at the remaining location in the longitudinal direction of the concrete structure construction location to run the block row. A lower concrete layer is formed from the lower row, and a lower concrete layer is formed at the remaining portion, and then a concrete finisher is run from the block row to form an upper concrete layer on the lower concrete layer. Construction method for concrete structures. 2. The method for constructing a concrete structure according to claim 1, wherein a plurality of the upper and lower concrete layers are provided in a direction orthogonal to a longitudinal direction of a concrete structure constructing site. 3. The method for constructing a concrete structure according to claim 1, wherein the concrete structure is a dam bank.