JP4418335B2 - Concrete building block construction method and concrete building block used therefor - Google Patents

Description

  The present invention relates to a method for constructing a non-self-supporting concrete building block and a concrete building block used therefor, in which concrete building blocks stacked in multiple stages and multiple rows can be accurately and quickly stacked with high quality. is there.

  In road construction and river improvement work, concrete building blocks are piled up on the mountain side to form a retaining wall. There are two types of stacking blocks: self-supporting type and non-self-supporting type, and in the case of non-self-supporting type, they cannot stand on their own when they are stacked on the foundation. You must correct and support your posture.

  FIG. 4 is a side sectional view showing an example of a conventional method for constructing a non-self-supporting concrete building block. After cutting the slope 1 and making the foundation 2, the chestnuts 3 are arranged on the slope 1 and the first layer of backfilled concrete C1 is placed up to the height L1. After placing and positioning the block B1, the second layer of backfill concrete C2 is struck. In the same procedure, the second-stage concrete block B2 is positioned, and backfilled concrete C3 is hit. The same procedure is repeated to stack the third and fourth concrete blocks B3, B4,.

  The problem here is that in order to load the concrete building blocks Bi (i = 1, 2, 3,...), Back-filled concrete Cj (j = 1, 2, 3,. It is necessary to be surely cured. Since it takes time to harden the concrete, a waiting time is required.

  Another problem is that the height of the backfilled concrete Cj is not necessarily constant. Therefore, in order to maintain the correct posture of the concrete stacking block Bi, the back portion of the concrete stacking block Bi with respect to the backfilling concrete Cj. For example, the wedge-shaped buttocks 4 must be filled. It is not preferable to fill the buttocks 4, but it is unavoidable. The fine adjustment by filling the bottom stone 4 requires that the back-filled concrete Cj is completely hardened, and is unstable and may shift when the next back-filled concrete Cj is placed. is there.

  In order to stop the filling of the buttstone 4, the height of the top surface of the concrete Cj must be determined accurately, but it is actually impossible to finish the heights L1, L2, L3, and L4 of the ready-mixed concrete with 1 mm accuracy. is there. As already indicated, the use of the butt stone 4 requires that the backfilled concrete Cj is properly hardened. For this reason, the surface of the portion indicated by the heights L1, L2, L3, and L4 Is formed as a separation layer, which is a weak point of the structure. For this reason, the use of the ass is still prohibited. However, today there is no suitable method to improve this.

  The above-mentioned conventional example is the most common concrete building block construction method, and is a simple and natural construction method, and there is no conventional construction method that improves this. If it dares to show, there is patent 3502081 gazette (a revetment structure and a revetment construction method, a revetment structure and a revetment construction method).

  In the structure of Japanese Patent No. 3502081, the surface layer material is made of synthetic resin, and the anchor material 5 is provided on the back surface of the concrete. This anchor is fixed in the concrete by inserting it into the frame simultaneously with the production of the concrete. The purpose of the reinforcement is to firmly fix the concrete block on the concrete block, and after the concrete is hardened, the construction structure is integrated by maintaining a considerable amount of pulling resistance between the concrete block and the reinforcement. It is unclear how the anchors fixed to the block will be positioned before placing the backfill concrete.

In JP 2002-81039 A (construction stone for civil engineering structures), in order to facilitate stacking construction of natural stone, a rod-shaped member is integrated with the natural stone so as to increase the engaging force against the back-filled crushed stone. It is a thing. However, the method of stacking these natural stones is completely different from the method of stacking concrete blocks, so it cannot be used as a reference.
Japanese Patent No. 3502081 publication, page 1, Fig. 5 Japanese Patent Laid-Open No. 2002-81039, page 1, FIG.

  In view of the above prior art, the present invention is capable of stacking a non-self-supporting concrete stacking block without waiting for complete curing of the backfilled concrete, and the back of the previous stage. An object of the present invention is to provide a concrete building block construction method and a concrete building block used therefor, which can adjust the block posture correctly without placing a butt stone between the concrete.

The concrete building block construction method of the present invention capable of solving the above-mentioned problems is a concrete building block in which non-self-supporting concrete building blocks are sequentially stacked in a predetermined width and height on a foundation continuing to an inclined slope. The non-self-supporting concrete building block is installed on the foundation so that the back surface faces the slope, and the bottomed hole provided on the back surface of the installed non-self-supporting concrete building block Hold the foldable bar with one end inserted and retracted, adjust the front of the non-independent concrete building block so that it is at the set angle and orientation, and bend it to the correct orientation when the adjustment allowance is large The other end of the bar is inserted into a chestnut stone placed along the slope, and the back side of the non-self-supporting concrete stacking block is inserted into the bar Therefore, after temporarily supporting and placing the backfill concrete under the temporarily supported non-self-supporting concrete stacking block, it is again stacked on the non-self-supporting concrete stacking block in one or a plurality of stages and stacked. Adjust the correct angle and orientation using a foldable bar inserted at one end into a hole with a bottom provided in the back of the concrete block, and set the other end of the bar to the slope. along temporarily supported by the rear side bars of the inserted non-self-supporting Konrito masonry block to pouring it is within Kuriishi, the Da設the backfill concrete to the bottom of the temporary supported uppermost non self-supporting concrete masonry blocks The operation is repeated, and multi-stage block stacking along the slope is performed.

The concrete building blocks are sequentially stacked horizontally and vertically. In the method of the present invention, one end of a linear short bar adjusted to an appropriate length is inserted into a hole provided in the back surface of the block so as to be freely inserted and removed, and the other end is inserted into the chestnuts behind the back surface, By adjusting the inclination angle of the stacked blocks, the stacked blocks are stacked sequentially in the horizontal direction while maintaining the adjusted block posture. At this time, the butt stone shown in the conventional example is not used on the back of each block. That is, each block is fixed by a chestnut behind it through a bar. Then, after one or a plurality of blocks are stacked, back-filled concrete including the bar is placed. Since there are few restrictions at the time of placing the backfill concrete and it is not necessary to completely cure, the work can be performed quickly and each block can be securely fixed.

  The backfill concrete can be based on a position sufficiently lower than this, or a position where a bar is inserted, without using the lines L1, L2, L3, and L4 shown in FIG. As a result, the placement height of the backfilling concrete is not so much concerned, and it is divided into one or two times, and each block is fixed using a bar material and securely fixed by placing the backfilling concrete. Can block well.

Concrete masonry blocks of this invention is a non-self-supporting concrete masonry blocks that can be used in the construction method, on the back, in cross section round or oval or rectangular, having a bottom depth of approximately 5~15cm The hole is provided. The holes provided on the back of the block are simultaneously molded by a die-cutting method when the block is manufactured. Or you may perforate using the drill etc. from the back part of the concrete block after hardening. The depth of the hole only needs to be such that one end of the bar is inserted and the block posture can be adjusted by the lever principle. The depth of the hole should be around 5 cm, and at most about 10 cm. In order not to decrease the block strength, shallower is better, and 15 cm is a limit value. A reinforcement ring may be applied to the exit of the hole for end reinforcement, but the necessity is low. The diameter of the hole provided in the block is preferably such that it can be loosely fitted into a 3-4 quarter reinforcing bar. A larger size is acceptable, but the range does not affect the block strength. The shape of the hole may be a circle, an ellipse or a rectangle. By making an ellipse or a rectangle, the angle of the bar can be adjusted in the lateral direction.

  The bar is used to adjust the inclination angle of the block based on the lever principle, and any member corresponding to an iron material in strength and flexibility may be used. From the standpoint of strength, flexibility, and price, it is optimal to use rebar scraps that are usually called three-part reinforcing bars or quadrant reinforcing bars. What is necessary is just to set the length of a bar as a distance between a concrete block back surface and the chestnut piled up on the slope, and it is usually set to about 20-40 cm. If necessary, it can be longer. For temporary structures that do not require durability, bamboo can be used. In the case of using a steel bar equivalent material, it will remain in the backfilled concrete, which will also serve as a reinforcement for backfilled concrete.

As described above, according to the present invention, it is possible to easily adjust the direction and orientation of the non-self-supporting concrete building block with the rod inserted so as to be freely inserted into and removed from the bottomed hole, and the rod inserted into the chestnut. Therefore, it is possible to place backfilled concrete in a stable temporary support state. Moreover, it can be improved faster and workability of the work it is possible to stack the next block without completely cured backfilling concrete.

  There can be a plurality of holes, but one is usually sufficient. By providing one at the center, the tilt angle can be adjusted in a balanced manner.

  In addition, since no buttstone is required between the backfill concrete and the concrete building block, the building block structure can be constructed with high quality according to the standard.

Since the concrete building block of the present invention has a configuration in which a bottomed hole is simply provided on the back surface, it can be stocked and transported without increasing the block manufacturing unit price and with the reinforcing bar removed at all times.

  As the bar material, a material obtained by simply cutting a rebar equivalent material can be used, so that the cost is not increased.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best mode for carrying out the invention will be described with reference to the accompanying drawings. FIG. 1 is a side sectional view showing a method for constructing a concrete building block according to the present invention. FIG. 2 is a cross-sectional view showing the configuration of the concrete building block of the present invention.

  As shown in FIG. 2, the concrete masonry block 5 of the present invention has a structure in which one hole 6 having a diameter d and a depth D is provided in a central portion of the back surface 5b. The concrete building block can be sufficiently accommodated by carrying in a hole drilled in advance at the time of molding in the factory, or by drilling with a concrete drill or the like when it is brought into the construction site. Since drilling requires time and effort, it is preferable to perform molding. The diameter d is set such that the rebar 7 cut short can be easily inserted and removed. When the reinforcing bar 7 is a third or quadrant, the one end 7a is, for example, 18 mm in diameter so that it can be easily inserted. Thereby, any reinforcing bar can be used.

  The depth D can be changed when the other end is moved left and right with one end 7a of the reinforcing bar 7 inserted, and the angle of the block front surface 5a can be changed by the lever principle and the reinforcing bar 7 is fixed when the block 5 is fixed. The depth is about 5 to 15 cm, for example, 5 to 10 cm, sufficient to bend in the vicinity of the back surface 5b.

  The reinforcing bar 7 can be prepared completely separately from the concrete building block 5. The concrete building block 5 is manufactured in a concrete factory, for example, and after carrying it in the field, a separately prepared reinforcing bar 7 is combined and used in the state shown in FIG.

  The reinforcing bar 7 may be manufactured from a high-strength plastic or the like, not an iron material or an iron material. In order to be able to adjust the bending, it is optimal to use scrap steel. Since the length of the reinforcing bar 7 is determined by the distance between the block back surface 5d and the slope 1 located behind it, it is generally about 20 to 40 cm.

  The construction method of this invention is demonstrated using FIG. First, slope 1 and foundation 2 are created. The process up to this point is the same as the conventional example.

  Next, the chestnut 3 is piled up to the height L1 along the slope 1. This height L1 is the height of the first layer of backfill concrete C1 shown in the conventional example. In the present invention, homogeneous back-filled concrete 8-1 is used, but the time of placing is different from that of the conventional example.

  The backfill concrete 8-1 of the present invention may be cast before the concrete block 5-1 is stacked, or may be cast after that.

  A reinforcing bar 7 is inserted in the back surface 5b of the concrete stack block 5-1. Therefore, the height of the other end 7b of the reinforcing bar 7 is adjusted on the chestnut, the posture on the foundation 2 of the concrete building block 5 or the preceding concrete building block 5 is corrected, and the positioning is fixed.

  The height adjustment of the other end 7b of the reinforcing bar 7 on the chestnut 3 can be easily performed. A crushing stone may be placed on the chestnut, and the dimensions of the chestnut 3 may be adjusted. Further, the reinforcing bars 7 may be bent near the block back surface 5b.

  Subsequently, the next stage, for example, the second stage concrete stack block 5-2 can be stacked. At this time, the back-filled concrete 8-1 for the previous stage may be placed together with the back-filled concrete 8-2 for this time.

  The backfill concrete 8 can be placed in a plurality of stages, but in order to securely fix the previous stage, it is better to cast it one by one. However, even in this case, since the butt stone 4 is not used, the next stage can be piled up with the backfilled concrete uncured. Since the building blocks are constructed in a continuous operation while the backfilled concrete is uncured, the adhesion with the backfilled concrete in the next stage is improved and a firm retaining wall can be built.

  Kuriishi 3 will be piled up sequentially according to the stacking of each stage. Thus, the concrete building blocks 5-1, 5-2, and 5-3 can be sequentially stacked.

  The Kuriishi 3 is piled up sequentially according to the stacking of each stage. At this time, the backfill concrete 8-1, 8-2, 8-3, 8-4 and the corresponding back Kuriishi 3-1, 3- For the purpose of ensuring a predetermined thickness of the backfill concrete, it is preferable to use a punching mold 9 that can cope with the progress of the construction work at the boundary with 2, 3-3, 3-4.

  FIG. 3 shows another example of a suitable stacking procedure. First, the first stage chestnut 3 is stacked (P1), and the concrete stack block 5-1 is stacked (P2). At this time, the angle of the concrete block 5-1 is adjusted using the reinforcing bar 7 on the chestnut 3. Next, after laminating concrete 5-1 in the lateral direction, lightly strike the backfill concrete (P3). Thereafter, the next chestnut 3 is stacked on the back (P4), the remaining backfilled concrete is appropriately punched using the mold 9 (P5), and the next concrete block 5-2 is stacked (P6). As for the method of stacking the chestnuts 3, the punching mold 9 is interposed between the chestnuts 3 and the backfill concrete, the back chestnut 3 is put on the back side, the punching molds 9 are pulled out, and the chestnut 3 is stacked up. The adjustment of the gradient and the normal line can be easily determined by an operation using the reinforcing bar 7 protruding from the block 5 and the back chestnut 3 as a support base. Since construction work can be continued continuously without waiting for the back-filled concrete 8 to harden, the weak point of the structure by the cold joint can be eliminated and work efficiency can be greatly improved.

  In this example, since the backfill concrete is hit in two steps, the stacking blocks 5-1 and 5-2 can be stacked without distortion while being securely fixed.

  It is possible to load the next concrete blocks 5-1, 5-2, 5-3, 5-4 without waiting for complete hardening of the backfill concrete 8-1, 8-2, 8-3, 8-4. As a result, the work that had to be accumulated over a large number of times in the past can be accumulated in one day, and the work efficiency becomes exceptionally good.

  In addition, the butt cage shown in the conventional example between each of the blocks 5-1, 5-2, 5-3, 5-4 and the backfill concrete 8-1, 8-2, 8-3, 8-4. Since stone 4 is not used, high quality (standard) block stacking can be performed.

  Conventionally, efforts have been made to hit the backfill concrete C1, C2, C3, and C4 accurately to the required height in order to minimize the use of the butt rock 4. In addition, I was using the Buttokishi 4 without stopping. For this reason, the gap between the backfill concrete and the block is small, and it is difficult to fill the concrete between them. Thus, in the present invention, the heights L1, L2, L3, and L4 of the respective backfill concretes 8-1, 8-2, 8-3, and 8-4 are set low, the gaps are increased, and the next stage Since the backfill concrete can be sufficiently filled, it is possible to improve the casting quality of the backfill concrete.

  In addition, even in the conventional method where the butt rock 4 is used implicitly, vibration compaction work using a vibrator of backfilled concrete for the purpose of improving the filling and adhesion between the stacking block and the backfilled concrete Encouragement was requested. However, the stacking block held by the butt quarry stone 4 could not withstand the vibration of the vibrator, and could not be reliably compacted. Or, there were many cases in which the stacked blocks were moved by vibration and a distorted wall surface was constructed. In the present invention, there is no such phenomenon, and a firm and highly accurate block stacking can be performed by performing sufficient vibration compaction work.

As described above, according to the concrete building block construction method of the present invention and the concrete building block used therefor, the stacking work is performed by placing the backfill concrete on the non-self-supporting concrete building block which is in a stable temporary support state by the bar. And the quality can be improved because it is not necessary to use a buttstone. Moreover, it is easy to block production, as the material it is possible to use wastes, etc., that without increasing the material costs, reduction of construction cost is FIG. As a result, the strength of the completed structure can be increased and finished with high quality.

  In the embodiment described above, the shape of the hole 6 is shown as an example of a circle, but it may be a horizontally wide ellipse or a rectangle. By using an ellipse or a rectangle, it becomes easy to align the other end 7b of the bar (rebar 7) on the chestnut 3 in the lateral direction.

  The present invention is not limited to the above-described embodiment, and is not limited to the illustrated block shape, and can be applied to non-self-supporting concrete blocks in general.

It is a sectional side view which shows the construction method of the concrete building block of this invention. It is sectional drawing of the concrete building block which concerns on one Embodiment of this invention. It is a section explanatory view showing one embodiment of a construction procedure. It is a sectional side view which shows the construction method of the conventional concrete pile block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slope 2 Foundation 3 Kuriishi 5 (5-1, 5-2, 5-3, 5-4) Concrete pile block 6 Hole 7 Reinforcement 8 (8-1, 8-2, 8-3, 8-4) depth P1~P7 construction order of diameter D hole of the back write Me concrete 9 punching mold hole d

Claims (3)

A concrete building block construction method in which non-independent concrete building blocks are sequentially stacked in a predetermined width and height on a foundation leading to an inclined slope,
A non-self-supporting concrete stacking block was installed on the foundation so that the back face was facing the slope, and one end was inserted into the bottomed hole provided on the back of the installed non-self-supporting concrete stacking block. Hold the bendable bar so that the front surface of the non-self-supporting concrete building block is set to the set angle and orientation, and when the adjustment allowance is large, bend the other end of the bar to the correct orientation. Inserted into the chestnut stones placed along the slope, and temporarily supported the back side of the non-self-supporting concrete stacking block with the bar, backfilled concrete to the bottom of the temporarily supported non-supporting concrete stacking block The non-self-supporting concrete stacking block stacked again in one or more stages on the non-self-supporting concrete stacking block The other end of the bar is driven along the slope by adjusting the correct angle and direction using a foldable bar inserted into the bottomed hole on the back so that it can be inserted and removed freely. Inserted into the chestnut stone, and the back side of the non-self-supporting concrete stacking block was temporarily supported by a bar, and the operation of placing back-filled concrete under the top-supported non-supporting concrete stacking block was repeated, A concrete building block construction method characterized by performing multi-stage block stacking along a slope. The method for constructing a concrete block according to claim 1, wherein the bar is formed by cutting a rebar equivalent material to a length of about 20 to 40 cm. A concrete masonry block used in the construction method of the concrete masonry blocks according to claim 1 or 2,
A concrete building block characterized by having a bottomed hole with a depth of about 5 to 15 cm in the back of a non-self-supporting reinforced concrete building block having a round, oval or rectangular cross section.

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