JP3657040B2 - PC block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a PC block used when a concrete structure is constructed by stacking concrete layers, for example.
[0002]
[Prior art]
For example, a number of PC blocks are arranged on a straight line spaced apart from each other to form two PC block rows, and a concrete layer is sequentially stacked between both PC block rows, and the PC block is placed in the PC block row as the concrete layer becomes higher. The height of the PC block is increased, and the overflow part of the sabo dam is constructed by repeating the stacking of the concrete layer and the PC block.
And when the lower part is wider than the upper part, such as the overflow part of such a sabo dam, when the PC blocks are sequentially stacked, the PC block is placed against the lower PC block. It is piled up in a displaced state on the concrete side.
[0003]
[Problems to be solved by the invention]
Therefore, the posture of the stacked PC blocks is difficult to stabilize, and conventionally, work such as supporting the stacked PC blocks with a pipe material or the like is required.
In addition, when the PC blocks are stacked unattended by remote operation, it is extremely difficult to dispose the pipe material that supports the stacked PC blocks.
The present invention has been devised in view of the above circumstances, and the object of the present invention is a state in which the PC block is displaced with respect to the lower PC block without requiring work such as support by a pipe material or the like. It is to provide a PC block that can be stably stacked and is extremely advantageous when unmanned construction is performed.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a PC block that is used in a row in the left-right direction and stacked vertically, and includes a flat lower surface, a flat upper surface, left and right side surfaces, and a front surface. , and a rear surface, the front is formed by the inclined surface facing forward obliquely downward, the 箇 office of the front side of the said upper surface, continuously left over to the other from one side of the right and left includes a convex protrusion upwardly extending in a direction, the 箇 office of the front side of the said lower surface, engaged with the convex portion of the lower PC blocks when stacked PC block vertically up and down the positioning of the PC block, with one concave recess upwardly extending continuously lateral direction over to the other from the side of the right and left, the center of gravity of the PC block, the concave portion by remote the The convex portion is located near the rear surface Has a semicircular cross section, the concave portion has a circular arc cross section, and the radius of the arc of the concave portion is larger than the radius of the semicircle of the convex portion. The top of the convex portion of the lower PC block is in line contact with the top of the concave portion of the PC block .
[0005]
Further, the present invention is characterized in that an inclined surface facing forward and obliquely upward is formed on an upper portion of the inclined surface facing forward and obliquely downward forming the front surface.
Further, the present invention is characterized in that an upper end of the inclined surface facing obliquely upward in front is connected to a lower end of the convex portion.
Further, the present invention is characterized in that the rear surface is formed as an inclined surface that faces obliquely upward and rearward .
Further, the present invention is a side of the right and left are flat and parallel to each other, the PC block exhibits a substantially rectangular when viewed in plan, characterized in that exhibits substantially parallelogram when viewed from the side.
[0006]
In the present invention, the upper and lower PC blocks are positioned by engaging the convex portions and the concave portions, and the PC blocks are stacked with high accuracy.
The side bottom surface of the PC block the upper convex portion and the concave portion is engaged with surface contact with the upper surface of the lower PC block, and the center of gravity away from the front surface than the engagement portion of the concave portion and the convex portion since the offset, the overturning of the front surface side of the PC block is prevented, stacking work is made stable, also, are kept stacked state stably even.
Thus, the loading on clogs PC blocks which have conventionally been required can be omitted work to support the pipe material or the like, is extremely advantageous for construction unmanned.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the Example of this invention demonstrates the PC block for sabo dam construction.
FIG. 1 shows a cross-sectional view of the overflow section of a sabo dam.
Reference numeral 2 denotes the overflow section of the sabo dam, and the upstream PC block row 4 and the downstream PC block row 6 are installed in a straight line along the longitudinal direction of the overflow portion 2 on both sides of the overflow section construction site. Is done.
The PC block rows 4 and 6 are configured such that a large number of PC blocks 8 are transported to an overflow construction site by an unmanned crawler dump and arranged in a straight line by an unmanned backhoe or the like.
Then, for example, a concrete layer C is formed between the PC block rows 4 and 6 in two stages, and then the PC blocks 8 are stacked on the PC block rows 4 and 6, and in two stages therebetween. Separately, the concrete layer C is formed. Similarly, as the concrete layer C becomes higher, the PC block rows 4 and 6 are stacked on the PC block rows 4 and 6 to increase the height of the PC block rows 4 and 6. The overflow section 2 is constructed by repeating the stacking of the concrete layer C and the PC block 8.
The width of the upper part of the overflow part 2, that is, the distance between the upstream side and the downstream side of the upper part of the overflow part 2 is formed equally, and the other part of the overflow part 2 excluding this upper part is the upstream side and the downstream side. The PC block 8 according to the present invention is used in the wide part so that the distance from the side gradually increases toward the lower part.
[0008]
2 to 4 is a plan view of the PC block 8 constituting the upstream PC block row 4, a side view, the plane of the PC block 8 rear view, 5 to 7 that constitutes the downstream-side PC block row 6 Figure, side view, showing a positive rear view.
The PC block 8 constituting the upstream PC block row 4 and the PC block 8 constituting the downstream PC block row 6 are substantially the same in terms of operation and effect except for the size of the details. The description will be made using the same reference numerals.
PC block 8 includes a lower surface 12, a top surface 14, and left and right side surfaces 16, a front 18 which is formed by the inclined surface facing forward obliquely downward, the surface 20 after being formed by the inclined surface facing rearward and obliquely upward And is formed in a substantially rectangular shape in a plan view and a substantially parallelogram in a side view.
[0009]
The lower surface 12 is formed as a flat surface, and a recess 22 extending continuously in the left-right direction from one to the other of the left and right side surfaces 16 is formed at a location near the front surface 18 of the lower surface 12.
Recess 22 is concave upward, it is formed in a circular arc shape with a radius of cross section R1.
The PC block 8 is formed such that its center of gravity G is displaced by a distance S closer to the rear surface 20 than the vertical line L1 passing through the center of the radius R1 of the recess 22.
[0010]
The upper surface 14 is formed as a flat surface, and a convex portion 24 extending in the left-right direction continuously from one side to the other of the left and right side surfaces 16 is formed at a location near the front surface 18 of the upper surface 14.
The convex portion 24 is convex upward, and the cross section is formed in a semi-cylindrical shape with a radius of R2 smaller than R1.
[0011]
The concave portion 22 and convex portion 24, as shown in FIG. 8, when a stack of PC block 8 vertically on the upper surface 14 of the lower PC block 8 together lower surface 12 of the upper PC block 8, which PC block 8 with the upper surface 14 and lower surface 12 are surface contact, Yes as the top of the convex portion 24 of the lower PC block 8 to the top of the recess 22 of the upper PC block 8 engages in line contact, In this embodiment, the center of the radius R <b> 2 forming the convex portion 24 is set at a location that is slightly displaced upward from the upper surface 14.
Further, the concave portion 22 and convex portion 24, move the lower surface 12 of the upper PC block 8 to the upper surface 14 of the lower PC block 8, the convex portion of the lower PC block 8 in the recess 22 of the upper PC block 8 when 24 is engaged, but to do the front 18 of the upper and lower PC block 8, also the rear surface 20 if by, but is formed so as to be parallel substantially, respectively. Incidentally, was what front 18 of the upper and lower PC block 8, also was what rear 20, respectively may be formed so as to lie in the same plane, thus, in the present invention, the front 18 What happened, but also The fact that the rear surfaces 20 are formed so as to be substantially parallel to each other includes the case where the rear surfaces 20 are located on the same surface.
[0012]
The front 18 formed by inclined surface facing forward obliquely downward, the concrete is pouring.
Surface 20 after being formed by the inclined surface facing rearward and obliquely upward it is made form parallel to the front 18.
Two fork insertion recesses 26 are formed on the front surface 18 with a left-right spacing. The fork insertion recess 26 is for carrying the PC block 8 with the fork inserted therein.
Further, from the front surface 18, an anchor material 28 having a part embedded therein protrudes. The anchor material 28 increases the bonding strength between the concrete to be placed and the PC block 8.
[0013]
Between the upper end of the inclined surface forming the front surface 18 facing obliquely downward and the lower end of the convex portion 24 near the front surface 18, the front surface is directed obliquely upward from one side to the other of the left and right side surfaces 16 . An inclined surface 30 is formed.
That is, portions of the front surface 18 side of the upper surface 14, and is notched shape by inclined surfaces 30 facing forward obliquely upward.
[0014]
Next, the operation will be described.
The upstream PC block row 4 and the downstream PC block row 6 shown in FIG. 1 are formed by arranging a large number of PC blocks 8 with their left and right side surfaces 16 aligned.
This operation is performed by an unmanned backhoe, slip form paper, or the like, and is easily performed by inserting the fork of the unmanned work machine into the fork insertion recess 26.
[0015]
Thus, if the upstream PC block row 4 and the downstream PC block row 6 are installed in a straight line along the longitudinal direction of the overflow portion 2 on both sides of the overflow portion construction location, the upstream PC block A concrete layer C is formed between the row 4 and the downstream PC block row 6.
For example, the concrete layer CC has an unmanned concrete finisher placed at one end in the longitudinal direction of the overflow section construction site, and the concrete finisher and the unmanned crawler dump are passed over while putting concrete from the crawler dump into the hopper of the concrete finisher. It is carried out while traveling to the other end side in the longitudinal direction of the flow part construction site, and the concrete is spread from the concrete finisher to the overflow part construction site with a predetermined thickness width.
[0016]
In addition, the vibrating roller travels in the same direction as the concrete finisher on the concrete spread from behind the traveling direction of the concrete finisher, and the concrete is compacted.
Furthermore, water is sprinkled on the concrete surface compacted by the green cutting machine behind the vibrating roller to cure the concrete, and then the green cutting operation is performed.
In this way, the concrete layer C is formed in a straight line along the longitudinal direction of the overflow section construction site.
[0017]
Concrete is concrete during compacting of the concrete by vibration roller is scattered, in the present embodiment, since the concrete is inclined slope 30 is formed on the upper end of the front surface 18 being pouring, which scattered by inclined slopes 30 of this was Therefore, it is possible to prevent the concrete from adhering to the upper surface 14.
And this makes it Rukoto not reliably smoothly the surface contact between the lower surface 12 and upper surface 14 of the upper and lower PC block 8 when stacking PC block 8, installation precision of the PC block 8 is increased.
Furthermore, in the embodiment, the upper end of the inclined surface 30 facing forward obliquely upward is connected to the lower end of the protrusion 24, even if the wall portion which receives the concrete bottom of the inclined slopes 30 the convexity 24 is scattered Since it functions, it is more advantageous in preventing the scattered concrete from adhering to the upper surface 14.
[0018]
If the above operation is repeated a plurality of times between the upstream PC block row 4 and the downstream PC block row 6 and the concrete layer C is formed up to half the height of the PC block 8, the upstream PC block The PC block 8 is overlapped on the row 4 and the downstream PC block row 6 to raise the upstream PC block row 4 and the downstream PC block row 6.
The PC blocks 8 are stacked by inserting a fork of an unmanned work machine into the fork insertion recess 26 as described above.
As shown in FIG. 8, the PC blocks 8 are stacked by aligning the lower surface 12 of the PC block 8 to be stacked on the upper surface 14 of the lower PC block 8 and the concave portion of the PC block 8 to be stacked on the convex portion 24 of the lower PC block 8. Thus, the upper PC block 8 is stacked in a state of being displaced toward the concrete layer C with respect to the lower PC block 8.
[0019]
That is, the convex portion 24 and concave portion 22 are engaged, is made to position the upper and lower PC block 8, the rear surface 20 and front surface 18 of the upper and lower PC block 8 is installed respectively parallel to, PC block 8 It will be stacked with high accuracy.
Further, in the embodiment, the concrete scattered during compacting of concrete received in inclined slope 30, since the adhesion of the concrete to the upper surface 14 of the PC block 8 is blocked, PC blocks stacked with the upper surface 14 of the PC block 8 The lower surface 12 of 8 is in surface contact with each other, and the accuracy of stacking is further increased.
[0020]
The upper and lower PC blocks 8 are in surface contact with the lower surface 12 and the upper surface 14, and the convex portion 24 and the concave portion 22 are in line contact, and the center of gravity G of the upper PC block 8 is the concave portion of the upper PC block 8. than the line contact portion between the 22 and the convex portion 24 of the lower PC block 8, the side away from the front face 18 (i.e., the rear surface 20 near) since the offset, if, at the time of stacking, front 18 side by the engagement of the recess 22 and the convex portion 24 is also a force acts is prevented overturning of the front 18 side of the PC block 8, which can be stacked in a stable state, also after it stacked, The stacked state is stably maintained.
Thus, the loading on clogs PC block 8 which have conventionally been required can be omitted supported Ru work by a pipe material or the like, becomes extremely advantageous when going stacking PC block 8 unattended.
[0021]
In this way, if the PC blocks 8 are arranged on the upstream PC block row 4 and the downstream PC block row 6, the space between the upstream PC block row 4 and the downstream PC block row 6 is the same as described above. The concrete layer C is formed, and the overflow section 2 is constructed by stacking the PC blocks 8 and stacking the concrete layer C.
[0022]
【The invention's effect】
As is apparent from the above description, the PC blocks according to the present invention are PC blocks that are arranged in rows in the left-right direction and stacked one above the other, and are flat bottom surfaces, flat top surfaces, left and right has a side surface, a front and a rear surface, the front is formed by the inclined surface facing forward obliquely downward, the 箇 office of the front side of the said upper surface, one from to the other sides of the right and left continuously provided with a convex protrusion upwardly extending in the lateral direction over, the 箇 office of the front side of the said lower surface, said convex portion of the lower PC blocks when stacked PC blocks vertically engaging the positioning of the upper and lower PC block, provided with a concave portion of the concave from a side of the left and right upwardly extending continuously lateral direction over to the other, the center of gravity of the PC block, the concave part I place in remote the rear surface closer Has location, the convex portion in cross-section is formed in a semicircular shape, the recess is formed in cross-section in a circular arc shape, the radius of the arc of the recess is larger than the radius of the semicircle of the convex portion, PC block The tops of the convex portions of the lower PC block are in line contact with the tops of the concave portions of the upper PC block .
Therefore, the PC block stacking operation is stably performed, the PC blocks are stacked with high accuracy, and the stacked state is also stably maintained.
Therefore, it is possible to omit the work of supporting the stacked PC blocks, which has been conventionally required, with a pipe material or the like, which is extremely advantageous when performing unmanned construction.
The PC block according to the present invention is not limited to a dam, and can be applied to the construction of various concrete structures and civil engineering structures, and is widely applied within a range not departing from the present invention.
[Brief description of the drawings]
1 shows a cross-sectional view of the overflow section of a sabo dam.
FIG. 2 is a plan view of a PC block constituting an upstream PC block row.
3 is a side view of the PC block constituting the upstream PC block row.
4 is a rear view of the PC block constituting the upstream PC block row.
FIG. 5 is a plan view of a PC block constituting a downstream PC block row.
6 is a side view of the PC block constituting the downstream PC block row.
7 is a positive plane view of a PC blocks constituting the downstream PC block row.
FIG. 8 is an enlarged view of a state in which PC blocks are stacked.
[Explanation of symbols]
4, 6 PC block row 8 PC block 12 lower surface 14 top surface 16 side 18 front <br/> 20 rear <br/> 22 recess 24 inclined surface facing the convex portion 30 diagonally forward upward

Claims (5)

It is a PC block that is arranged in a row in the left-right direction and stacked and used vertically,
A flat lower surface, a flat upper surface, left and right side surfaces, a front surface, and a rear surface;
The front surface is formed of an inclined surface facing diagonally forward and downward,
The 箇 plants of the front side of the said upper surface, provided with convex protrusions from one side of said left and right upwardly extending continuously lateral direction over to the other,
The 箇 plants of the front side of the said bottom surface, the engaging positioning of the upper and lower PC blocks to the convex portion of the lower PC blocks when stacked PC block up and down from one side of the right and left comprising a concave portion of the concave upwardly extending continuously lateral direction over to the other,
Center of gravity of the PC block, located in the recess by remote the rear face closer,
The convex portion has a semicircular cross section, the concave portion has an arc shape in cross section, and the arc radius of the concave portion is larger than the semicircular radius of the convex portion, and the PC blocks are stacked up and down. Sometimes the top of the convex portion of the lower PC block is in line contact with the top of the concave portion of the upper PC block.
PC block characterized by this. Wherein the top of the inclined surface facing the forward obliquely downward forming the front, PC block of claim 1, wherein the inclined surface facing forward obliquely upward is formed. The PC block according to claim 2 , wherein an upper end of the inclined surface facing obliquely upward in front is connected to a lower end of the convex portion. It said rear surface, PC block according to claim 1 or 2, wherein is formed an inclined surface facing rearward and obliquely upward. 5. The PC block according to claim 4, wherein the left and right side surfaces are flat and parallel to each other, and the PC block has a substantially rectangular shape in plan view and a substantially parallelogram in a side view.

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