JP2005179949A - Precast concrete block for constructing foundation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a precast concrete block for constructing a foundation, installable regardless of a straight line section and a curve section, and formable as a sure and strong foundation without requiring cast-in-place concrete. <P>SOLUTION: This concrete block 100 is constituted so that both end parts 11 and 12 are formed in a circular arc shape; among these end parts, one 11 is formed by projecting the upper side to the lower side; the other 12 is formed by projecting the lower side to the upper side, and is adjacently installed to a concrete block 100 formed in the same way; and a lower side projecting part 12a of the concrete block adjacent to an upper side projecting part 11a, can be installed in an overlapping shape. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a precast concrete block for building a foundation structure.

  As a block that is continuously arranged at both ends to construct a straight or curved foundation, there is a precast concrete block that can construct a guardrail foundation. This is because each precast concrete block that forms an integral guardrail foundation structure has a toe plate portion and a low plate portion having tapered portions at both ends of the heel plate portion, and both end portions thereof are formed in an arc shape. It is provided on the heel plate part side of the bottom plate part at the both ends of the vertical wall part, the pillar part having a hole for installing the guard rail column, and the vertical wall part, and is positioned relative to each other. The thing which consists of a rib which has a some long hole is proposed.

  This block is installed in such a manner that a bolt is passed through a long hole of each rib provided in both end portions of the precast concrete block, and a washer and a nut are connected to each other through a long hole of each rib provided on both ends of the precast concrete block. Therefore, it carries out by fastening so that a rib may be inserted | pinched from both sides, respectively.

  According to such a guardrail foundation structure, the relative positions of the connected precast concrete blocks can always be maintained constant. Moreover, at this time, the displacement of fastening elements such as bolts with respect to the respective precast concrete blocks can be prevented by filling mortar or concrete into the space formed between the ribs of the precast concrete blocks. (See Patent Document 1 above).

  However, this precast concrete has the following problems. First, when installing in a straight section, since the part which a continuous block directly contacts is only a vertical wall part, the mutual fixing force by a block is weak. Therefore, in order to prevent the displacement of the block, the displacement of fastening elements such as bolts against each precast concrete block is prevented by filling the space formed between the ribs of each precast concrete block with mortar or concrete. In addition, it was necessary to guarantee the reliability of this integrated guardrail foundation structure.

Further, although it is possible to correspond to a certain curved portion in the curved section, there is a problem that the angle of the curve that can be set is limited by the shape of the tapered portion of the low plate portion. In addition, it is necessary to use special washers and nuts that are composed of a washer with a phase recess that comes in direct contact with the ribs of the precast concrete block and a hemispherical washer that comes in contact with the nut. was there.
JP 2002-309594 A

  Therefore, the present invention has been made in view of the above problems, and can be installed regardless of a straight section or a curved section, and does not require cast-in-place concrete, and a reliable and solid foundation. An object of the present invention is to provide a precast concrete block (hereinafter also simply referred to as “concrete block”) for foundation construction that can be used.

  In order to solve the above-mentioned problems, the means taken by the invention described in claim 1 is a foundation for supporting the support column 51 of the linear or curved guard rail 50, which is continuously arranged closely at both ends. In the precast concrete block 100 for foundation construction that forms the upper and lower ends 11, 12 of the block body 10 in the longitudinal direction, the upper side of one end 11 of the both ends 11, 12 is formed. Is provided with an upper protruding portion 11a formed to protrude sideways, and the other end portion 12 includes a lower protruding portion 12a formed with the lower side protruding sideways. This is a precast concrete block 100 for construction. This concrete block 100 is mainly used when the concrete block 100 is arranged in the center, that is, when the concrete block 100 is arranged adjacent to both end portions 11 and 12 among those to be continuously arranged. Therefore, the concrete block 100 has a structure for connecting to the concrete blocks adjacent to the longitudinal ends 11 and 12. Specifically, both end portions 11 and 12 are formed in an arc shape, and one of these end portions 11 is formed such that the upper side protrudes in the longitudinal direction with respect to the lower side, and the other 12 The lower side protrudes in the longitudinal direction with respect to the upper side. That is, the projecting portions 11 a and 12 a are alternately provided at both end portions 11 and 12. The concrete block 100 thus formed is laid adjacent to the similarly formed concrete block 100 so that the lower surface of the lower projecting portion 12a and the upper surface of the upper projecting portion 11a of the adjacent concrete block overlap. (See FIG. 2). According to the first aspect of the present invention, since the upper and lower surfaces of the projecting portions 11a and 12a of both concrete blocks 100 are in surface contact, it is possible to ensure a stable joint with each other. Moreover, even if it is a case where it installs in the curve section of a road, since the edge parts 11 and 12 are provided in arc shape, arbitrary angles are set according to the curvature of a curve area, without mutual edge parts 11 and 12 interfering. Can be installed at. Therefore, the foundation can be constructed in any curve section.

  Furthermore, the means taken by the invention described in claim 2 is that the upper projecting portion 11a and the lower projecting portion 12a have the same projecting length, and the precast concrete block for foundation construction according to claim 1 100. By making the protruding lengths of the protruding portions 11a and 12a on both sides the same length, the tips of the protruding portions 11a and 12a come into contact with the end of the other block, and as shown in FIG. And can be installed without waste.

  Furthermore, the means taken by the invention described in claim 3 is formed in a circular convex shape on the lower surface of the upper protruding portion 11a and a fitting convex portion 20a formed in a circular convex shape on the upper surface of the lower protruding portion 12a. The pre-cast concrete block 100 for foundation construction according to claim 1 or 2, characterized by comprising a fitting recess 21a. When the concrete blocks are arranged adjacent to each other, the fitting convex portions 20a can be fitted into the fitting concave portions 21a of the adjacent concrete blocks so as not to be easily detached (see FIGS. 2 and 3). The circular fitting convex part 20a and the fitting concave part 21a are made circular so that the concrete blocks can be fitted to each other at any angle and fitted. This is because the rotation with the fitting portion as a fulcrum can be freely performed even after the adjustment, so that the relative angles can be easily adjusted even after installation.

  Further, the means taken by the invention described in claim 4 is formed in a circular concave shape on the lower surface of the upper protruding portion 12a and a fitting concave portion 21a formed in a circular concave shape on the upper surface of the lower protruding portion 11a. A precast concrete block for foundation construction 100 according to claim 2, comprising a fitting convex portion 20a. In contrast to the upper projecting portion 12a and the lower projecting portion 11a of the precast concrete block 100 for foundation construction according to claim 3, a fitting convex portion and a fitting concave portion are attached. That is, the fitting concave portion 21a is formed on the upper surface of the lower protruding portion 11a, and the fitting convex portion 21a is formed on the lower surface of the upper protruding portion 11a. As for the action, the fitting state is reversed, but, as in the invention according to claim 7, by fitting the fitting concave portion 21a fitting convex portion 20a of the concrete blocks 100 arranged adjacent to each other. Therefore, it can be prevented from coming off easily, and movement in the rotation direction with the fitting portion as a fulcrum can be secured.

  Further, the means taken by the invention described in claim 5 is characterized in that a bolt hole 30 for passing a bolt or a reinforcing bar is formed in the center of the fitting convex part 20a and the fitting concave part 21a. Item 5. The precast concrete block 100 for foundation construction according to item 3 or 4. Adjacent precast concrete blocks 100 for foundation construction can be reliably fixed by passing bolts or reinforcing bars through the bolt holes 30 after being overlapped.

  Further, in the precast concrete block 101 for foundation construction that forms the foundation for supporting the support column 51 of the guardrail 50, one end 13 in the longitudinal direction of the block main body 10 is provided. Precast concrete block 101 for foundation construction, characterized in that it is formed in an arc shape and is provided with an upper projecting portion 13a or a lower projecting portion 13b in which the upper side or the lower side of the end portion projects sideways. . This concrete block 100 is a block to be installed at the end of a plurality of guardrail foundations constructed continuously. Therefore, the concrete block 101 has a structure for connecting to the adjacent concrete block 101 only at one end 13 in the longitudinal direction. That is, one end portion 13 in the longitudinal direction of the concrete block 101 is provided in an arc shape, and further, protruding portions 13a and 13b in which either the upper side or the lower side of the end portion 13 protrudes to the side are provided. Yes (see FIGS. 6 and 7). The concrete block 101 is upside down with respect to the protruding portion of the adjacent block, that is, the concrete block protruding upward has an end protruding downward, and the basic concrete block protruding downward is upward. By arranging the projecting end portions, the projecting portions can be connected in a state of being overlapped with each other. This connection structure itself is the same as that according to claim 1. Moreover, since the edge part 13 is provided in arc shape, since blocks can be arranged at an angle, even if it is a curved road which has any curvature, blocks can be installed according to a curve.

  Furthermore, the means taken by the invention described in claim 7 is that a fitting convex portion 22a formed in a circular convex shape is provided on the upper surface of the lower protruding portion 13b or the lower surface of the upper protruding portion 13a. It is set as the precast concrete block 100 for foundation construction of Claim 6 characterized by these. Of the protruding parts 13a and 13b to the side, in the case of the type in which the lower side protrudes, a circular protruding fitting convex part 22a is provided on the upper surface, and in the case of the type in which the upper side protrudes to the side, the lower surface is circular. The fitting convex part 22a which protruded in is provided. This precast concrete block 100 can be fixed by fixing the precast concrete block 100 having the concave fitting recess 21a adjacent to the protruding portion so that the convex portion and the concave portion are fitted.

  Furthermore, the means taken by the invention described in claim 8 is characterized in that a fitting concave portion 23a formed in a circular concave shape is provided on the upper surface of the lower protruding portion 13b or the lower surface of the upper protruding portion 13a. The precast concrete block 100 for foundation construction according to claim 6 is used. This is a modification of the fitting convex portion 22a described in claim 7 to a fitting concave portion 23a, and a precast concrete block 100 having a convex fitting convex portion 21a is provided adjacent to the protruding portions 13a and 13b. Thus, the convex portion and the concave portion can be fitted.

  Furthermore, the means taken by the invention described in claim 9 is characterized in that a bolt hole 30 for passing a bolt or a reinforcing bar is formed in the center of the fitting convex portion 22a or the fitting concave portion 22a. The precast concrete block 100 for foundation construction according to Item 7 or 8. Similarly to the fifth aspect of the invention, the bolts or the reinforcing bars are passed through the bolt holes 30 to ensure the fixing to each other.

  Furthermore, the means taken by the invention described in claim 10 is characterized in that a support body mounting hole 52 for supporting the support rail 51 of the guard rail 50 is provided on the upper surface of the block body 10. The precast concrete block 100 for foundation construction according to any one of 1 to 9 is used. This is a pre-cast concrete block provided with holes for attaching the pillars so that the guardrail can be attached immediately.

  Furthermore, the means taken by the invention described in claim 11 is characterized in that an extending plate portion 40 extending laterally is provided below the longitudinal side wall of the block body 10. It is set as the precast concrete 100 for guardrail foundations in any one of Claim 1 to 10. By providing the area (extension board part 40) in which earth and sand etc. are laid in a block main part, the stable foundation of concrete block 100 can be built with the weight of earth and sand. According to the concrete block provided with such an extended plate portion 40, sufficient stability is provided by the earth and sand placed on the extended plate portion 40 even in a place where there is no road on the back side such as a cliff edge. As a result, the foundation can be prevented from falling to the cliff side, and a guardrail foundation can be formed even on such a cliff edge (see FIG. 10).

  According to the precast concrete block for foundation construction according to the present invention, a foundation construction that does not require cast-in-place concrete and that can be used to create a guardrail foundation structure by simply installing it in a straight section, a curved section, etc. regardless of the curvature of the road. Precast concrete blocks can be provided.

  Of the precast concrete blocks for foundation construction according to the present invention, an embodiment in particular for constructing a foundation for a guardrail will be described in detail with reference to the drawings.

  The perspective view of the precast concrete block for foundation construction which concerns on Example 1 is shown by FIG. This precast concrete block 100 is mainly used for a central portion among blocks that are connected to form a foundation. The precast concrete block 100 is provided with a column mounting hole 52 for mounting the column 51 of the guard rail 50 at an arbitrary position on the upper surface. Both ends 11 and 12 of the block body 10 are formed in a semicircular arc shape, and one end portion 11 of the block main body 10 includes an upper protruding portion 11a provided with an upper half protruding in the longitudinal direction. The other end portion 12 includes a lower protruding portion 12a provided with a lower half protruding in the longitudinal direction. These protrusion parts 11a and 12a are parts where the precast concrete blocks 100 installed adjacent to each other are overlapped. The lower protrusion 12a is provided with a bolt hole 30 for inserting a bolt at the center of the arc on the upper surface thereof. In FIG. 3, the bolt hole 30 is formed without penetrating to the lower surface, but may be formed to penetrate to the lower surface. And the fitting convex part 20a formed in circular convex shape about 2 cm high centering on this bolt hole 30 is provided. On the other hand, a penetrating bolt hole 30 is provided in the opposite upper protruding portion 11a in order to insert a bolt or a reinforcing bar into the center of the arc. A fitting concave portion 21a formed in a circular concave shape having the same size as the fitting convex portion 20a is provided on the lower surface of the upper protruding portion 11a.

  As shown in FIG. 2, the precast concrete block 100 formed in this way is connected so that the fitting convex portion 20a and the fitting concave portion 21a are fitted and overlapped with each other. At this time, adjacent precast concrete blocks are installed at an angle according to the curvature of the road. By the fitting connection of the fitting convex portion 20a and the fitting concave portion 21a by the overlapping, it is possible to prevent the horizontal separation from each other. In addition, bolts and iron bars are inserted into the bolt holes to completely fix both blocks. Even in this state, the blocks can rotate with respect to each other around the bolt hole, so that the curved sections having various curvatures can be installed by changing the angle of the arbitrarily connected blocks. Can also be handled on site. And as shown in FIG. 5, a guardrail is attached and the circumference | surroundings are paved and it is used as a foundation of a guardrail.

    For convenience of explanation, it has been explained using a curved section, but of course, it may be used in a straight section, as shown in FIG. It is not something that must be used.

  FIG. 7 is a perspective view of the precast concrete block for foundation construction according to the first embodiment. The concrete block 100 is of a type used for an end portion among blocks that are connected and arranged to form a foundation. The precast concrete block 100 is also formed in a long shape as in the first embodiment. A column mounting hole 52 for mounting the column 51 of the guardrail 50 is provided in the approximate center. One longitudinal end portion 13 is formed in a semicircular arc shape, and the lower half of the end portion formed in the arc shape forms a protruding portion 13b protruding in the longitudinal direction. This is used when the upper half is combined with a concrete block 100 that protrudes laterally from the end. A bolt hole 30 through which a bolt is passed is provided at the center of the arc of the downward projecting portion 13b in order to securely connect to the adjacent adjacent concrete block. In addition, a fitting convex portion 22a formed in a circular convex shape with the bolt hole as the center is formed on the upper surface of the protruding portion. This is one in which a fitting concave portion 21a formed in a circular concave shape of the same size is formed on the lower surface of the concrete block 100 on which the upper protruding portion 11a is formed, and can be connected by fitting. It is. These fitting parts may form a circular concave fitting concave part on the upper surface of the projecting part of the present embodiment, and form a fitting convex part on the precast concrete block for foundation construction that is installed adjacently. In addition, although the shape of the edge part 14 on the opposite side to the side by which the lower half protruded is formed in circular arc shape in FIG. 7, the shape is not specifically limited.

  FIG. 8 is a perspective view of a foundation-cast precast concrete block 101 according to the third embodiment. This is the concrete block used at the end of the block that is continuously installed, and is used at the end opposite to the second embodiment. The point that the support | pillar attachment hole 52 for attaching the support | pillar 51 of the guardrail 50 is formed in the upper surface of the block main body 10 is the same as that of Example 1. FIG. The concrete block 101 has one longitudinal end formed in an arc shape and, unlike the second embodiment, has an upper projecting portion 13a formed by projecting the upper half. A bolt hole 30 for passing a bolt is formed through the center of the upper protrusion 13a. A fitting concave portion is formed in a circular concave shape around the bolt hole 30. Therefore, the lower half is connected and fitted to the precast concrete block formed to protrude.

FIG. 9 shows a perspective view of the precast concrete block for foundation construction according to the fourth embodiment. This is provided with an extended bottom plate portion 40 extending laterally below the side wall of the block main body. Other configurations are the same as those in the first embodiment. Further, as shown in FIG. 10, the installed base can be formed by the same method as in the first embodiment.
By providing the extended plate portion 40 in this way, when installed in a road, earth and sand will be placed on the extended bottom plate portion 40. Therefore, a stable foundation is provided by the weight of the earth and sand. It can be. If the concrete block of this Example 4 is used, even if it is a place where one side cannot support one side of a block like a cliff like FIG. 11, it will be mounted in this extended bottom-plate part 40. Since the foundation is stabilized by the earth and sand, a stable guardrail foundation can be laid.

It is a perspective view of the precast concrete block for foundation construction concerning Example 1. FIG. It is a perspective view which shows the state which connected the precast concrete block for foundation construction which concerns on Example 1. FIG. It is a figure which shows the cross section of the state which connected the precast concrete block for foundation construction which concerns on Example 1. FIG. It is a figure which shows another Example of the precast concrete block for foundation construction which concerns on Example 1. FIG. It is a figure which shows the state which laid the precast concrete block for foundation construction which concerns on Example 1. FIG. It is the perspective view which showed another use condition of the precast concrete block for foundation construction which concerns on Example 1. FIG. It is sectional drawing of the precast concrete block for foundation construction which concerns on Example 2. FIG. It is a perspective view of the precast concrete block for foundation construction concerning Example 3. FIG. It is a perspective view of the precast concrete block for foundation construction concerning Example 4. It is a perspective view which shows the state which installed the precast concrete block for foundation construction which concerns on Example 4. FIG. It is a figure which shows the state which laid the precast concrete block for foundation construction which concerns on Example 4. FIG.

Explanation of symbols

10 Block main bodies 11, 12 Both ends 11a Upper protrusion 12a Lower protrusion 20a Fitting protrusion 21a Fitting recess 13 End 13a Upper protrusion 13b Lower protrusion 22a Fitting protrusion 23a Fitting recess 40 Extension plate Part 50 Guardrail 51 Post 100 Precast concrete block for foundation construction

Claims (11)

In precast concrete blocks for foundations that are placed in close contact at both ends to form a straight or curved foundation,
Both ends in the longitudinal direction of the block main body are formed in an arc shape, and one end of each of the both ends includes an upper protrusion formed so that the upper side protrudes sideways, and the other end on the opposite side The part is provided with a lower projecting part formed by projecting the lower side to the side, and a precast concrete block for foundation construction.   The precast concrete block for foundation construction according to claim 1, wherein the upper protruding portion and the lower protruding portion have the same protruding length.   The fitting convex part formed in the circular convex shape on the upper surface of the lower side protrusion part, and the fitting recessed part formed in the circular concave shape on the lower surface of the upper side protrusion part are provided, The feature characterized by the above-mentioned. Precast concrete block for foundation construction.   The fitting concave part formed in the circular concave shape on the upper surface of the lower side protrusion part, and the fitting convex part formed in the circular convex shape on the lower surface of the upper side protrusion part, It is characterized by the above-mentioned. Precast concrete block for foundation construction.   The precast concrete block for foundation construction according to claim 3 or 4, wherein a bolt hole for passing a bolt or a reinforcing bar is formed at the center of the fitting concave portion and the fitting convex portion. In the precast concrete block for foundation construction that forms the foundation,
One end of the block body in the longitudinal direction is formed in an arc shape, and an upper part or a lower part is formed by projecting the upper part or the lower part of the end part to the side. This is a precast concrete block for foundation construction.   The precast concrete block for foundation construction according to claim 6, wherein a fitting convex portion formed in a circular convex shape is provided on the upper surface of the lower projecting portion or the lower surface of the upper projecting portion.   The precast concrete block for foundation construction according to claim 6, wherein a fitting concave portion formed in a circular concave shape is provided on the upper surface of the lower protruding portion or the lower surface of the upper protruding portion.   The precast concrete block for foundation construction according to claim 7 or 8, wherein a bolt hole for passing a bolt or a reinforcing bar is formed in the center of the fitting convex part or the fitting concave part.   The precast concrete block for foundation construction according to any one of claims 1 to 9, wherein a column mounting hole for supporting a column of a guardrail is provided on an upper surface of the block body.   The precast concrete for guardrail foundation according to any one of claims 1 to 10, wherein an extended bottom plate portion extending laterally is provided below the side wall of the block main body.

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