JP2010137382A - Method of producing concrete block for civil engineering structure and concrete block for civil engineering structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of producing concrete block for civil engineering structure by which stylization to arrange natural stones is established to secure the quality and working efficiency is improved to reduce the working time, and to provide the concrete block for civil engineering structure. <P>SOLUTION: In the method of producing the concrete block for civil engineering structure by integrating a plurality of the natural stones S filled into a form work 1 with the concrete 25 placed in the form work 1, a stamp 8 having a preliminarily fixed designed shape is pressed to form a recessed part 10 on the upper surface of the concrete 25 and the natural stones S are filled in the recessed part 10 to integrate with the concrete 25 when the concrete 25 placed in the form work 1 is semi-hardened state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a concrete block for a civil engineering structure and a concrete block for a civil engineering structure, and more particularly to a concrete block for a civil engineering structure suitable for constructing a revetment in a river or a coast using natural stone. And a concrete block for civil engineering structures.

Conventionally, as a concrete block for revetment construction using natural stone in this kind of rivers and coasts, generally, a concrete block frame is placed on the site, and inside-filled concrete is cast in the frame, A concrete block for revetment construction is manufactured at the site by planting natural stone, and revetment construction is carried out.
Moreover, as a manufacturing method of the concrete block for revetment construction using a natural stone, the manufacturing method of patent document 1 is known, for example. Thus, in the revetment construction known from Patent Document 1, primary concrete is cast in a predetermined thickness in a mold to form a solidified portion having a predetermined strength, and then a plurality of solidified portions are formed on the solidified portion. By placing the natural stones in an appropriate manner and then placing secondary concrete around the natural stones and solidifying the primary concrete and the secondary concrete, Concrete blocks are produced by integrating concrete, secondary concrete and natural stone.
Japanese Patent No. 36060597.

The concrete block for revetment construction using natural stone manufactured in the above-mentioned conventional site is put into the formwork carried to the site, and the worker still has the natural stone one by one. Before it hardened, it was planted to produce concrete blocks using natural stone.
However, in this conventional manufacturing method, there are restrictions on the hardening time of the concrete, and there are problems in quality control such as the number of natural stones and the size standard. Further, in the invention described in Patent Document 1, a plurality of natural stones arranged on a root-solidified portion formed by placing primary concrete is appropriately arranged by an operator. For this reason, the shape tends to be uneven. In addition, there is a problem that the working time for adjusting the shape is increased, the working efficiency is lowered, and the construction period is lengthened.

  Therefore, a method for producing a concrete block for civil engineering structures and a concrete block for civil engineering structures capable of securing quality by stylizing the form of arranging natural stones and improving work efficiency and shortening the work period are provided. Therefore, a technical problem to be solved arises, and the present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a method for producing a civil structure concrete block in which a plurality of natural stones are embedded (planted) on the upper surface of the block. When the concrete placed in the mold is in a semi-solid state, the upper surface of the concrete is pressed with a stamp material having a predetermined design shape to form a dent, and the natural stone is placed in the dent. A method for producing a concrete block for civil engineering structures is provided, wherein the concrete and the natural stone are integrated.

  According to this method, when the concrete stamped in the mold is in a semi-solid state (here, the semi-solid state means a state in which the concrete has not yet solidified), the stamp material is applied to the upper surface of the concrete. By pressing, forming a dent of a predetermined design shape on the upper surface of the concrete, and filling the dent with natural stone, and then integrating the concrete and the natural stone, the surface of each concrete block is Natural stones are arranged, and the natural stones are almost covered with the upper surface of the concrete.

  The invention according to claim 2 provides a concrete block for civil engineering structures formed by the manufacturing method according to claim 1.

  According to this configuration, a concrete block in which a large number of natural stones are arranged and integrated is obtained.

  According to a third aspect of the present invention, there is provided a concrete block for a civil engineering structure according to the second aspect of the present invention, wherein the concrete is provided with two through holes facing each other.

  According to this configuration, earth and sand can be packed in the through hole, and in such a case, plant seeds and the like fly and settle in the through hole.

  According to a fourth aspect of the present invention, there is provided a concrete block for a civil engineering structure according to the third aspect of the present invention, wherein the through hole is horizontally penetrated to be suspended in the concrete and a reinforcing bar is provided.

  According to this configuration, at the time of work at a construction site or the like, the wire can be hung from the suspended reinforcing bar penetrating the through hole in the horizontal direction.

  Invention of Claim 5 provides the concrete block for civil engineering structures which provides the connection reinforcing bar which connects the said concrete blocks adjacent to each other in the side of the said concrete in the invention of Claim 2, 3 or 4 To do.

  According to this configuration, when the connecting reinforcing bars of adjacent concrete blocks are connected, the adjacent concrete blocks can be connected to each other.

  The invention according to claim 1 can use natural stones at the construction site, and by using the natural stones, it is possible to secure the effect of reducing transportation costs and the effect of reducing material costs. In addition, since the concrete block integrated with the natural stone is packed into the dent on the top surface of the concrete made by pressing the stamp material at the construction site, the manufacturing time of the concrete block can be shortened. The quality of revetments such as rivers and coasts can be made uniform.

  The invention according to claim 2 can secure a reduction in transportation cost and a material cost saving effect by using natural stone. In addition, the quality of revetments such as rivers and coasts can be made uniform using an integrated concrete block.

  In the invention described in claim 3, since seeds such as plants fly and settle in the through-holes that vertically penetrate the concrete block and face each other, in addition to the effects of the invention described in claim 2 Therefore, plant growth effects can also be expected.

  The invention according to claim 4 can enhance the workability by hanging the suspended rebar by suspending a wire or the like at the time of construction work.

The invention according to claim 5 can eliminate unnecessary movement between the concrete blocks by connecting the adjacent concrete blocks to each other via the connecting reinforcing bars. Therefore, the invention according to claim 2, 3 or 4 In addition to the above effect, the joint strength of the laid concrete revetment can be secured, and the stability against running water can be enhanced.

  The present invention relates to a method for manufacturing a concrete block for a civil engineering structure and a concrete for a civil engineering structure capable of ensuring the quality by arranging the natural stones in a line and improving the work efficiency and shortening the work period. In order to achieve the purpose of providing a block, the concrete placed in the formwork is semi-solidified in the method of manufacturing a civil engineering structure concrete block in which multiple natural stones are embedded (planted) on the upper surface of the block When in a state, a stamp material having a predetermined design shape is pressed on the upper surface of the concrete to form a recess, and the natural stone is embedded in the recess to integrate the concrete and the natural stone. It was realized.

  A preferred embodiment of the present invention will be described below with reference to FIGS. First, an example of a formwork used in the method for producing a concrete block for a civil engineering structure according to the present invention will be described.

  A formwork 1 used for manufacturing a concrete block for civil engineering structure of the present invention is formed in a box shape with a bottom having a substantially rectangular shape in FIG. Moreover, the recessed part 3 toward the inner side of the said mold 1 is formed in the intermediate part of a pair of side wall 2a, 2a which this mold 1 opposes, respectively, The other pair of side wall which this mold 1 opposes On the intermediate part of 2b and 2b, convex parts 4 directed outward of the mold 1 are formed. And these recessed part 3 and the convex part 4 are formed in the substantially identical shape by planar view.

  Further, the lower end portions of the concave portions 3 and 3 and the convex portions 4 and 4 are respectively provided at positions higher than the bottom wall 2c of the mold 1 by a predetermined distance.

  Further, in the present embodiment, a cross-shaped groove 5 is formed on the bottom wall 2c of the mold 1 so as to connect the bottom surfaces of the concave portions 3 and 3 and the convex portions 4 and 4, and the cross-shaped groove 5 is formed. The grooves 5 are provided with concave portions 6 having a rectangular shape in plan view at the inner four corners of the mold 1.

  The side walls 2a, 2a, 2b, 2b of the concave portions 3, 3 and the convex portions 4, 4 are respectively provided with slit-shaped notches 7, 7, 7, 7 from the upper end portion toward the bottom wall 2c. Is formed.

  Moreover, in this embodiment, as shown to (a) of FIG. 2, the stamp material 8 used when the concrete block 20 shown in FIG. 3 thru | or FIG. 5 is manufactured is prepared. The stamp material 8 is formed in substantially the same shape as the upper end opening of the mold 1 in plan view, and the lower surface of the stamp material 8 when the concrete 25 placed in the mold 1 is in a semi-solidified state. In order to be pressed against the upper surface of the concrete 25 to form a predetermined design on the upper surface of the concrete 25, for example, dents 10, 10 having a circular shape, a semicircular shape, an elliptical shape, a rectangular shape, etc. .. Are provided so that a plurality of cans can be formed simultaneously.

  Next, a procedure for manufacturing the concrete block 20 shown in FIGS. 3 to 5 using the mold 1 and the stamp material 8 configured as described above will be further described with reference to FIGS. 1 and 2.

  First, the formwork 1 having the configuration shown in FIG. 1 is assembled at a construction site, or the formwork 1 is assembled in advance at a factory or the like and carried into the construction site.

  Next, a suspended rebar 21 (see FIGS. 3 and 4), which will be described later, in the mold 1, a connecting rebar 22, 22... Protruding outward through the notches 7, 7. A cylindrical core 24 that forms the holes 23 is installed. FIG. 2A shows this state. The reinforcing support frame body, the suspended rebar 21, the connecting rebar 22 and the core 24 are assembled in a cage shape using welding or the like outside the mold frame 1, and then placed in the mold frame 1. You may make it install.

  Subsequently, a predetermined amount of concrete 25 is placed in the mold 1, and the concrete support 25, the suspended reinforcing bars 21, the connecting reinforcing bars 22, and predetermined portions of the core 24 are covered with the concrete 25. .

  Next, when the concrete 25 is in a semi-solid state, the lower surface of the stamp material 8 is strongly pressed and released from the upper surface of the concrete 25, and the convex teeth 9, 9,. As shown in (b), a plurality of depressions 10, 10... are formed on the upper surface of the concrete 25 at the same time.

  Next, a large number of natural stones S, S... Are respectively inserted into the recesses 10, 10... Provided on the upper surface of the concrete 25, and the concrete 25 and the natural stones S, are solidified by solidifying the concrete 25. S ... are integrally fixed. As a result, almost the entire upper surface of the concrete 25 is covered with the natural stones S, S... Inserted into the recesses 10, 10. Here, the natural stones S, S... Are selected so as to be collected at the construction site and inserted into the recesses 10, 10... ... inserted into each and fixed integrally.

  Further, by waiting for the concrete 25 to solidify and removing the mold 1, the natural stones S, S... And the concrete 25, the suspended rebar 21 and the connecting rebar 22, as shown in FIGS. Concrete block 20 with 22 ... etc. integrated is obtained. The core 24 may be left in the concrete 25 as in this embodiment, or may be removed together with the mold 1.

  In the concrete block 20 thus manufactured, a concave portion 20c is formed in the middle portion between the pair of opposite side walls 20a and 20a, and the concave portion 20c is formed in the middle portion between the other pair of side walls 20b and 20b. Protrusions 20d are formed respectively. And these recessed part 20c and convex part 20d are formed in the substantially identical shape by planar view. In addition, the connecting reinforcing bars 22 are installed on the side surfaces of the concave portions 20c and 20c and the convex portions 20d and 20d in a state of protruding outward.

  Further, the concrete block 20 is provided with through-holes 23, 23 that vertically penetrate the concrete block 20, and a suspended reinforcing bar 21 that horizontally penetrates the through-holes 23, 23 is installed.

  The concrete block 20 is laid at the end as shown in FIGS. 6 and 7, for example, in addition to the concrete block having the shape in which the convex portions 27 shown in FIGS. 3 to 5 are provided on both sides. A concrete block or the like having a shape in which convex portions 20d are provided only on one side is prepared for use. And by combining these, a revetment having a predetermined shape can be constructed.

  Thus, the concrete block 20 obtained in this way is sequentially placed flush on the slope G so as to cover the slope G of a river or a coast as shown in FIGS. Be built a revetment. Further, at the time of construction, if a wire (not shown) is hung on the suspended reinforcing bar 22 in the through hole 23 as necessary, the concrete block 20 can be suspended and moved to a predetermined position.

  Further, as shown in FIG. 9, the adjacent concrete blocks 20, 20... Are arranged side by side with the convex portion 20 d of the other concrete block 20 biting into the concave portion 20 c of one concrete block 20. The connecting rebars 22, 22 of the concrete blocks 20, 20... Are connected by connecting fittings (not shown) to restrain relative movement of each other. In addition, after the installation of the concrete blocks 20, 20,..., Earth and sand collected at the construction site are packed in the through holes 23, 23. At that time, plant seeds and the like fly and settle in the through holes 23, 23, and the plant grows later to improve the beauty of the revetment.

  Further, the joint portion 30 between the facing concrete blocks 20 and 20 has a structure as shown in FIG. In the structure shown in the figure, a porous fiber 32 is arranged on a slope G, and then a concrete 33 is placed on the porous fiber 32 to form a concrete layer 34 and the porous fiber 32 formed of the concrete 33. A construction method is adopted in which a two-layer structure is used in which the joint portion 30 is closed with the porous fiber layer 35 made of the above.

  Thus, when the concrete 33 is placed from above the porous fiber 32, before the concrete 33 is solidified, the viscous liquid tro (water, cement, mortar, small sand, etc.) contained in the concrete 33 is removed. ) Flows down into the porous fibers 32 forming the porous fiber layer 35, and only the aggregate 33a remains mainly in the concrete 33 placed on the upper side of the porous fibers 32, and the concrete 33 is made of bone. The material 33a is made porous with a honeycomb-like cavity. In the porous concrete 33, the earth and sand enter the cavity as time passes, and seeds such as plants fly and settle in the earth and sand, and the plants are grown and thrive.

  As the porous fiber 32, for example, a thread-like fiber material, a metal wire is entangled in a complicated manner and rounded, and a hollow portion is provided inside to make it porous, or a net-like member is rounded. It is a thing made porous by providing a hollow part inside, but if it has a hollow part into which the viscous liquid Toro contained in the concrete 33 can flow, other structures It may be.

  Here, when only the earth and sand are packed in the joint portion 30 between the concrete blocks 20 and 20 facing each other, the mudflow flowing on the revetment and the sand and sand on the back of the revetment are sucked out. However, if the concrete layer 34 and the porous fiber layer 35 that are made porous in this way are provided, the earth and sand are not sucked out and discharged. In addition, earth and sand can accumulate on the concrete 33 to further grow and grow the plant. Moreover, the width of the joint portion 30 can be increased by increasing the strength of the revetment.

  In the revetment structure of the embodiment shown in FIGS. 8 and 9, the concrete block 40a disposed on the slope shoulder portion of the slope G and the concrete block 40b disposed on the slope bottom portion are “heavy” in a side view. It is arranged in a letter shape. The two concrete blocks 40a and 40b have the same shape, and are used so as to be turned over 180 degrees and turned when they are placed on the shoulder and the tail. In this way, when the U-shaped concrete blocks 40a and 40b are arranged on the sloped shoulder and the sloped part of the slope, the strength of the sloped part and the sloped part increases and a revetment strong against turbulent flow is formed. Is done.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The perspective view of the formwork used with the manufacturing method of the concrete block for civil engineering structures concerning this invention. It is a figure explaining the manufacturing method of the concrete block for civil engineering structures concerning this invention, (a) is a figure immediately after pouring concrete, (b) is a figure after pressing a stamp material, (c) is a stamp material. It is a figure which shows the state which inserted the natural stone in the dent formed by. The top view of the concrete block which concerns on 1st Example formed with the manufacturing method of this invention. The front view of a concrete block same as the first embodiment. The side view of a concrete block same as the first embodiment. The top view of the concrete block which concerns on 2nd Example formed with the manufacturing method of this invention. The front view of a concrete block same as the above which concerns on 2nd Example. The longitudinal cross-sectional view of the civil engineering structure constructed | assembled by the concrete block same as the above. The top view of the civil engineering structure built by the concrete block same as the above. FIG. 10 is an enlarged vertical sectional view taken along line AA in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Formwork 2a Side wall 2b Side wall 2c Bottom wall 3 Concave 4 Convex part 5 Groove 6 Concave part 7 Notch 8 Stamp material 9 Convex part tooth form 10 Concave 20 Concrete block 20a Side wall 20b Side wall 20c Concave part 20d Convex part 21 Suspended reinforcement 22 Connection reinforcement 23 Through-hole 24 Core 25 Concrete 30 Joint part 32 Porous fiber 33 Concrete 33a Aggregate 34 Concrete layer 35 Porous fiber layer S Natural stone G Slope

Claims (5)

In the method of manufacturing a civil engineering structure concrete block in which a plurality of natural stones are embedded (planted) on the upper surface of the block,
When the concrete placed in the mold is in a semi-solid state, the upper surface of the concrete is pressed with a stamp material having a predetermined design shape to form a recess, and natural stone is placed in the recess. A method for producing a concrete block for civil engineering structures, wherein the concrete and the natural stone are embedded to be integrated.   A concrete block for civil engineering structures, which is formed by the manufacturing method according to claim 1.   The concrete block for a civil engineering structure according to claim 2, wherein two through holes are provided facing each other in the concrete.   4. The concrete block for civil engineering structure according to claim 3, wherein a suspended reinforcing bar formed horizontally through the through hole is provided in the concrete.   The concrete block for a civil engineering structure according to claim 2, 3 or 4, wherein a connecting reinforcing bar for connecting the adjacent concrete blocks to each other is projected from a side surface of the concrete.