JP2007170153A - Foundation construction method of retaining wall construction making use of retaining wall l-type concrete block and foundation structure of retaining wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation side fitting structure capable of contemplating the shortening of a construction time and the efficiency of foundation formation work when a retaining wall L-type concrete block is installed in the retaining wall construction work of the boundary wall work of a preparation housing site and the shoulder work of a road, etc. <P>SOLUTION: Longitudinal direction forms 1 opposed to each other at a regular interval at the upper side of base concrete 23 developed on foundation soil 36 are continued in the longitudinal direction, and the interval is divided and partitioned into suitable distances, concrete is placed inside the partition to develop an approximately plane L-type block foundation base 7 on the base concrete 23, and it is characterized in that the foundation side fitting structure fitted by coinciding with a block side fitting structure mounted on the vertical wall base of the retaining L-type block installed on the top face of the L-type block foundation base 7 so that each upper surface form 4 placed on the upper side thereof can be filled with additional concrete before the concrete is solidified or a molding foundation block having a fitting structure on the top face can be placed on the upper side to be fixed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a construction method for constructing a foundation for retaining wall construction, such as a boundary wall for building a residential land using an L-shaped concrete block for retaining walls (hereinafter referred to as an L-shaped block for retaining walls) or a road shoulder, and after completion. Related to the basic structure.

  When the retaining wall is constructed using the retaining wall L-shaped block, as shown in FIG. 31, conventionally, the horizontal foundation concrete 23 is formed on the foundation soil 36, and the foundation block 35 formed thereon is formed. Was constructed in order, and the retaining wall L-shaped block 3 was sequentially installed and fixed on the foundation block 35. And the base part 35 and the base part of the L-type block 3 for retaining walls were embedded under the ground surface after construction.

  In this case, the retaining wall L-shaped block is 1 ton and 2 m in height even if it is a regular one that is frequently used. Although a good foundation block is laid horizontally on the foundation concrete 23 to create a foundation surface, the conventional foundation block has the effect of only placing the L-shaped block 3 ′ for retaining walls. It was just a mounting table, and it was not a structure that could install, position, connect, and fix the retaining wall L-shaped block. Further, the top surface of the foundation concrete 23 is not simply installed and positioned for the retaining wall L-shaped block 3 ′, and the structure and shape for fitting and fixing the bottom surface thereof, but the foundation block 35 is simply placed and laid. It was a plane.

  The construction method of the foundation of the retaining wall construction using the conventional retaining wall L-shaped block is that the foundation block 35 laid on the foundation concrete is a simple mounting table for placing the retaining wall L-shaped block 3 '. Because it remained in effect, the work of fixing and fixing the foundation block 35 and the positioning and fixing of the L-shaped block 3 'for the retaining wall with the weight and dimensions installed on the foundation block 35 It was a factor of efficiency reduction and also a cause of extension of construction period.

  In the present invention, following the creation of the foundation concrete 23, when the concrete is driven onto the L-type block foundation base 7, the additional concrete is added to the upper formwork arranged on the upper surface before the concrete is solidified. In this construction method, the foundation-side fitting structure is filled and the foundation concrete is integrated with the upper L-shaped block foundation 7 provided with the fitting structure on the upper surface at the construction site.

  The requirements for the foundation block, which is the foundation of the retaining wall L-shaped block, are an effective structure and shape for fixing to the foundation concrete, connection with the installed retaining wall L-shaped block, fixing, etc. That's it. The foundation construction method according to the present invention can be constructed at the construction site simultaneously with the placement of the foundation concrete, unlike the conventional foundation block in which the connection requirement with the foundation concrete and the L-shaped block for retaining wall is insufficient. It is an efficient construction method, and the L-type block foundation built on the upper surface of the foundation concrete is integrated and continuous in the direction of the retaining wall construction. Since the bottom of the vertical wall of the mold block is connected and fixed, the structure and shape satisfy the conditions required for the foundation block. As a result, the sliding of the L-shaped block for the retaining wall installed on the upper surface, It works effectively to prevent movement such as tilting, settling and falling.

  In the foundation construction method according to the present invention, an L-shaped block foundation 7 having an upper surface formed in a substantially horizontal plane is formed by placing concrete at the construction site on the upper side of the foundation concrete 23 created on the foundation soil 36. An upper surface formwork is installed on the upper side, and the upper surface formwork is filled with additional concrete 22 before the concrete of the placed L-type block foundation 7 is solidified. This is a construction method for forming a basic fitting structure that fits and fits with the block-side fitting structure formed on the bottom surface of the vertical wall of the L-shaped block 3 for the wall. The foundation platform 7 is continuous with the foundation concrete 23 in an integrated state with the foundation concrete 23.

  In the construction method according to the present invention, the additional concrete filling for forming the foundation-side fitting structure on the upper surface of the L-shaped block foundation is performed by filling the upper-surface mold frame arranged on the upper side of the L-shaped block foundation. Since it is carried out before solidification of the concrete filled in the L-type block foundation, it can be constructed without waste of working time almost simultaneously with the filling of the concrete into the L-type block foundation. Further, the additional concrete to be filled in the upper surface formwork is almost necessary for forming the foundation-side fitting structure, so that a small amount is sufficient. The basic fitting structure can be easily molded, and at this time, it is also possible to easily reinforce by embedding iron materials such as bolts.

  Conventionally, since it is difficult to install the foundation block horizontally unless the foundation concrete is formed on a horizontal plane, the horizontal plane formation is adjusted twice when the foundation concrete is driven and when the foundation block is laid. However, in the construction method of the present invention, the horizontal plane formation is adjusted only once during the construction of the L-shaped block foundation, so that the construction time is shortened and the foundation construction work becomes extremely efficient.

  As shown in FIGS. 1, 2, 3 and 18, 18 and 20, the present invention is a longitudinal type in which the upper side of the foundation concrete 23 formed on the foundation soil 36 is opposed to each other with a space therebetween. The frame 1 is made continuous in the longitudinal direction, and the interval is divided into an appropriate distance, and concrete is poured into the compartment to form an L-shaped block base 7 having a substantially horizontal plane on the foundation concrete 23. Next, before the poured concrete is solidified, an additional concrete 22 is filled into the upper surface mold 4 arranged on the upper side thereof, so that the concrete is placed on the upper surface of the L-shaped block base 7 as shown in FIG. A foundation side fitting structure that fits and fits with the block side fitting structure provided on the bottom surface of the vertical wall of the retaining wall L-shaped block 3 can be constructed. The basic structure. 1, 2, and 3 are projection molds, the block-side fitting structure shown in FIG. 4 is an L-concave recess 12, and the base-side fitting structure is a fitting protrusion 25. It is.

  As shown in FIG. 5, the foundation structure completed according to the present invention has an L-shaped block 3 for retaining walls installed on an L-shaped block base 7 and an L-concave recess 12 provided on the bottom of the vertical wall. The fitting protrusion 25 of the mold block base 7 is inserted and connected and fixed. As shown in FIG. 6, the retaining wall L-shaped block 3 includes a vertical wall 8 having a block-side fitting structure on the bottom surface, and a concrete filling hole 10 connected to the vertical wall at an angle of 105 degrees. The bottom plate 9 is provided, and the vertical wall 8 and the support portion 11 connected to the bottom plate 9 are configured. The retaining wall L-shaped block 3 is installed and fixed on the L-shaped block foundation 7, and then the concrete is filled between the concrete filling hole 10 of the bottom plate 9 between the foundation concrete 23 and the bottom plate 9, and the foundation is firmly constructed. Thereafter, the rear side (bottom plate side) of the retaining wall L-shaped block 3 is filled up to the upper end of the vertical wall 8 to create an upper surface 13 and the front side is filled with a root portion to form a lower surface 14.

  FIG. 6 is a perspective view of the retaining wall block 3 installed on the upper surface of the foundation structure according to the present invention, and the block-side fitting structure is exemplified by the L-con fitting recess 12 in the same manner as the vertical wall bottom described above. It is. FIG. 7 to FIG. 17 show an embodiment of the upper surface formwork used in the foundation construction method according to the present invention.

  FIG. 7 is an upper surface mold used for providing a fitting hole 6 as a foundation-side fitting structure, and a fitting hole mold 4A provided with a plurality of downward projections 5 and an additional concrete filling cutout 31. This is an example.

  FIG. 8 is an upper surface formwork used in the case of providing the longitudinal downward projection 25 as the foundation side fitting structure, and the longitudinal fitting with the continuous longitudinal downward projection 15 and the additional concrete filling notch 31 provided. This is an example of the groove form 4B.

  FIG. 9 is an upper surface formwork used when the width direction fitting groove 26 is provided as the base side fitting structure, for the fitting concave portion provided with the widthwise downward protrusion 16 and the additional concrete filling notch 31. This is an example of the mold 4C.

  FIG. 10 is an upper surface formwork used when providing the fitting hole 6 as the foundation-side fitting structure, for a single fitting hole provided with one downward projection 5 and an additional concrete filling notch 31. This is an example of a mold 4D.

  FIG. 11 is a top formwork used when providing a long recess as a foundation fitting structure, for a single fitting recess provided with one widthwise downward projection 16 and an additional concrete filling cutout 31. This is an example of the mold 4E. Since the upper surface formwork of the embodiment of FIGS. 10 and 11 is for one piece, if the installation position is determined, the handling is easy and convenient.

  FIG. 12 is a top formwork used when the fitting protrusion 25 is provided as a foundation fitting structure, and two upward cylinders 17 for filling the concrete and forming the fitting protrusion 25 are provided. This is an example of the projection mold 4F.

  FIG. 13 is an upper surface mold used when the longitudinal protrusions 27 are provided as the basic fitting structure. The two upward protrusion frames 21 facing each other and the upward protrusion 21 are filled with concrete. Therefore, this is an embodiment of the longitudinal projection form 4G in which the interval portion 18 is provided therebetween.

  FIG. 14 shows an upper surface mold used when the width direction protrusions 29 are provided as the fitting structure for the foundation. The width is provided with the space 18 between the upper protrusion frame 21 and the concrete to be opposed to each other. It is an Example perspective view of the direction projection strip form 4H. 13 and 14 can be embedded by inserting reinforcing bars in the space 18.

  FIG. 15 shows an implementation of a single projection mold 4I provided with one upward cylindrical body 17 filled with concrete as an upper surface mold used for providing a fitting projection 25 as a foundation fitting structure. It is an example.

  FIG. 16 is an upper surface mold used as a foundation fitting structure when a long protrusion in the width direction is provided, and a single protrusion mold having one upward long hole 20 surrounded by a protruding frame. This is an example of 4J. Since the upper surface formwork shown in the embodiment of FIGS. 15 and 16 is for one protrusion, it is easy to handle if the installation position is determined, and it is also easy to embed a bolt or the like in this part to make it strong. Can be.

  FIG. 17 is an upper surface mold used when a longitudinal step 30 is provided as a fitting structure for a foundation. The upper projection frame 21 is supported by the spacing support piece 19 and is opposed to each other, and concrete is filled to form an upper stage. Therefore, this is an example of the step mold 4K provided with a gap portion 18 therebetween.

  18 to 21 show the foundation construction method according to the present invention, and in all of these embodiments, before the concrete of the L-type block foundation 7 solidifies, it is filled with additional concrete for forming the foundation-side fitting structure. To do is a basic condition. FIG. 18 is a widthwise longitudinal sectional view showing an example of the foundation construction method using the longitudinal fitting groove mold 4B on the upper frame, and the additional concrete 22 on the L-type block foundation 7 is It fills from the additional concrete filling missing part 31 shown in FIG. The position portion of the longitudinal downward projection 15 needs to be recessed in advance when the L-shaped block base 7 is formed.

  FIG. 19 is a widthwise longitudinal sectional view showing an example of a foundation construction method using a longitudinal projection form 4G as an upper face form, and the additional concrete 22 on the L-type block foundation 7 is shown in FIG. Since it fills from the space | interval part 18 shown in 13 and the longitudinal direction protrusion 27 is shape | molded, workability | operativity is favorable.

  FIG. 20 is a widthwise longitudinal sectional view showing an example of the foundation construction method using the step form 4K as the top form, and the additional concrete 22 on the L-type block foundation 7 is shown in FIG. Since the space | interval part 18 shown is filled, the workability | operativity which shape | molds an upper stage is favorable like the Example of FIG.

  The retaining wall L-shaped block 3 installed on the L-shaped block base 7 has many different sizes and different heights. Therefore, it may be necessary to fix the vertical wall 8 in an inclined state corresponding to the height of the retaining wall to be constructed. Corresponding to such a case, the request | requirement of comprising the upper surface of the L-shaped block base 7 in an inclined surface arises. FIG. 21 shows an embodiment of the L-type block foundation 7 corresponding to such a requirement. The upper surface of the L-type block foundation 7 on the foundation concrete 23 is formed in two longitudinal directions in which the lower stage is formed as an inclined surface. It is a perspective view of the Example which fixes in the state which comprised in the level | step difference and inclined the L-shaped block for retaining walls installed in a lower level | step difference. Therefore, in order to form the lower stage on an inclined surface, it is convenient to use a mold having a flat plate as an inclined plate.

  22 to 28 show an embodiment of the foundation-side fitting structure formed on the top surface of the L-type block foundation 7 according to the present invention. FIG. 22 is an embodiment in which a fitting hole 6 is provided on the horizontal upper surface of the L-shaped block foundation 7 as a foundation-side fitting structure for fitting into the block-side fitting structure.

  FIG. 23 is an L-shaped block base according to the present invention, and a fitting protrusion 25 is provided on the horizontal upper surface of the L-shaped block basic base 7 as a base-side fitting structure for fitting to the block-side fitting structure. This is an example.

  FIG. 24 shows an L-shaped block foundation according to the present invention, and a longitudinal fitting groove 26 is provided on the horizontal upper surface of the L-shaped block foundation 7 as a foundation-side fitting structure for fitting to the block-side fitting structure. This is an example.

  FIG. 25 is an L-type block base according to the present invention, and a longitudinal protrusion 27 is provided on the horizontal upper surface of the L-type block base 7 as a base-side fitting structure for fitting to the block-side fitting structure. This is an example.

  FIG. 26 shows an L-type block foundation according to the present invention, in which a width direction fitting groove 28 is provided on the horizontal upper surface of the L-type block foundation 7 as a foundation-side fitting structure for fitting to the block-side fitting structure. This is an example.

  FIG. 27 is an L-shaped block base according to the present invention, and a width direction protrusion 29 is provided on the horizontal upper surface of the L-shaped block base 7 as a base-side fitting structure for fitting to the block-side fitting structure. This is an example.

  FIG. 28 is an L-shaped block base according to the present invention, and a two-step longitudinal step 30 is provided on the horizontal upper surface of the L-shaped block base 7 as a base-side fitting structure that fits into the block-side fitting structure. It is a perspective view of the Example which provided.

  FIG. 29 shows a molded foundation block 32 used in the foundation construction method according to the present invention, and a plurality of connecting filling holes 33 for filling concrete to be connected to the foundation concrete 23 and the retaining wall L-shaped block 3. It is the Example which provided the some fitting protrusion 25 which fits into the L-con side fitting structure provided in the vertical wall bottom face. As shown in FIG. 30, immediately after the foundation concrete 23 is driven, the molded foundation block 32 excludes the foundation concrete 7 at the position of the connecting filling hole 33, and is stacked on the concrete before solidifying the concrete. Concrete is filled from the filling hole 33 for connection into the basic concrete 23. Therefore, since it can construct simultaneously with the foundation concrete 7, it is advantageous and can be firmly connected and fixed with the foundation concrete 23.

  It is a general | schematic top view of the field which shows the basic construction method of the retaining wall construction using the L-shaped concrete block for retaining walls which concerns on this invention.   It is a general | schematic expanded sectional view of the longitudinal direction A-A 'of the basic construction method shown in FIG.   It is a general | schematic expanded sectional view of the width direction B-B 'of the foundation construction method shown in FIG.   It is a longitudinal cross-sectional view of the width direction which shows the foundation structure created with the foundation construction method of this invention.   It is a longitudinal cross-sectional view of the state which completed the retaining wall construction which installed the L-shaped concrete block for retaining walls on the foundation structure created by the foundation construction method of this invention.   It is a perspective view of the L-shaped concrete for retaining walls which the foundation construction method and foundation structure which concern on this invention utilize.   It is a perspective view of the form for fitting holes which showed the example of the upper surface formwork used with the foundation construction method concerning the present invention, and provided with the plurality of downward projections and the lack part for additional concrete filling.   It is a perspective view of the longitudinal fitting groove form which provided the example of the upper direction formwork used with the foundation construction method concerning this invention, and provided the continuous downward protrusion in the longitudinal direction and the lack part for additional concrete filling.   It is a perspective view of the form part for fitting recessed parts which showed the Example of the upper surface formwork used with the foundation construction method which concerns on this invention, and provided the width direction downward protrusion and the missing part for additional concrete filling.   It is a perspective view of the form for single fitting holes which showed the example of the upper surface formwork used with the foundation construction method concerning the present invention, and provided one downward projection and the lack part for additional concrete filling.   It is a perspective view of the formwork for the single fitting recessed part which showed the Example of the upper surface formwork used with the foundation construction method which concerns on this invention, and provided one width direction downward protrusion and the removal part for additional concrete filling .   It is the perspective view of the formwork for protrusion which shows the Example of the upper surface formwork used with the foundation construction method which concerns on this invention, and provided two upward facing cylinders.   It is a perspective view of the upper direction mold frame used in the foundation construction method according to the present invention, and an opposing upward projecting frame and a longitudinal projection mold frame provided with a spacing portion therebetween.   It is the perspective view of the width direction protrusion strip form which showed the Example of the upper surface formwork used with the foundation construction method which concerns on this invention, and provided the opposing upward projection frame and the space | interval part between it.   It is the perspective view of the type | mold for single protrusions which showed the Example of the upper surface formwork used with the foundation construction method which concerns on this invention, and provided one upward cylinder.   It is a perspective view of the form for single projection which showed the example of the upper surface formwork used with the foundation construction method concerning the present invention, and provided one upward long hole surrounded by the protruding frame.   It is a perspective view of the formwork for a level | step difference which provided the Example of the upper surface mold used for the foundation construction method which concerns on this invention, and provided the opposing upward projection frame, the space | interval part between them, and a flat plate.   The basic construction method which concerns on this invention is shown, and an upper surface formwork is the width direction sectional drawing of the Example which uses the longitudinal direction fitting groove formwork.   The basic construction method which concerns on this invention is shown, and an upper surface formwork is the width direction sectional drawing of the Example which uses the form for longitudinal direction protrusions.   The foundation construction method which concerns on this invention is shown, and an upper surface formwork is the width direction sectional drawing of the Example which used the formwork for level | step differences.   The foundation construction method according to the present invention is shown, and the upper surface of the L-type block foundation on the foundation concrete is constituted by two longitudinal steps with the lower step formed on an inclined surface, and is installed on the lower step L It is a perspective view of the Example fixed in the state which inclined the mold block.   It is a perspective view of the example which showed the L type block foundation concerning the present invention, and provided a plurality of fitting holes in the upper surface.   It is a perspective view of the Example which showed the L type | mold block base which concerns on this invention, and provided the some fitting protrusion on the upper surface.   It is a perspective view of the Example which showed the L-shaped block base which concerns on this invention, and provided the longitudinal direction fitting groove | channel on the upper surface.   It is a perspective view of the Example which showed the L-shaped block base which concerns on this invention, and provided the longitudinal direction protrusion on the upper surface.   It is a perspective view of the Example which showed the L-shaped block base based on this invention, and provided the width direction fitting groove | channel on the upper surface.   It is a perspective view of the Example which showed the L-shaped block base which concerns on this invention, and provided the width direction protrusion on the upper surface.   It is a perspective view of the Example which showed the L-shaped block base which concerns on this invention, and provided the two-step longitudinal direction level | step difference on the upper surface.   The block side provided in the bottom of the vertical wall of the L-shaped block for the retaining wall which shows the shaping | molding foundation block used for the foundation construction method which concerns on this invention, and is filled with the concrete for connecting with foundation concrete, and the L-shaped block for retaining walls It is a perspective view of the Example which provided the fitting protrusion which fits a fitting structure.   FIG. 29 shows a concrete foundation construction method according to the present invention using the molded foundation block illustrated in FIG. 29, filling concrete from a connecting filling hole, and fixing the molded foundation block having a fitting protrusion to the foundation concrete before solidification. It is the construction state figure to do.   It is a longitudinal cross-sectional view which illustrates the Example of the conventional foundation construction method using the conventional retaining wall block and the conventional foundation block.

Explanation of symbols

1. 1. Longitudinal formwork Partition form 3. Retaining wall L-shaped block 3 '. 3. Conventional retaining wall L-shaped block Upper surface mold 4A. Fitting hole mold 4B. Longitudinal fitting groove form 4C. Form for fitting recess 4D. Single fitting hole mold 4E. Single fitting recessed form 4F. Projection mold 4G. Longitudinal projection form 4H. Form for width direction protrusion 4I. Single protrusion mold 4J. Single protrusion mold 4K. Step formwork 5. 5. downward projection 6. Fitting hole L-type block base stand8. Vertical wall9. Bottom plate 10. Concrete filling hole 11. Support part 12. L-con fitting recess 13. Upper surface 14. Lower ground surface 15. Longitudinal downward projection 16. 16. Width direction downward protrusion 17. Upward cylinder 18. Spacing part 19. Spacing support piece 20. Upward long hole 21. Upward projection frame 22. Additional concrete 23. Foundation concrete24. Filling 25. Fitting protrusion 26. Longitudinal fitting groove 27. Longitudinal protrusion 28. Width direction fitting groove 29. Width direction protrusion 30. Longitudinal step 31. Depletion part for additional concrete filling 32. Molding basic block 33. Connecting filling hole 34. Connected concrete 35. Basic block of conventional L-shaped block 36. Foundation soil

Claims (6)

  On the upper side of the foundation concrete created on the foundation soil, a longitudinal mold frame that is opposed to each other with a space therebetween is continued in the longitudinal direction, and the space is divided by an appropriate distance, and the concrete is cast into the space. In addition, an L-shaped block foundation base having a substantially horizontal surface is formed on the foundation concrete, and before the concrete is solidified, an upper concrete frame placed on the upper side is filled with additional concrete to thereby form an L-shaped block foundation base. L-type for retaining wall, characterized in that it has a base-side fitting structure that fits and fits with the block-side fitting structure provided on the bottom of the vertical wall of the L-type block for retaining wall to be installed Basic construction method of retaining wall construction using concrete blocks.   On the upper side of the foundation concrete created on the foundation soil, a longitudinal mold frame that is opposed to each other with a space therebetween is continued in the longitudinal direction, and the space is divided by an appropriate distance, and the concrete is cast into the space. Then, an L-shaped block foundation with a substantially horizontal surface is created on the foundation concrete, and before the concrete solidifies, a molding foundation block having a fitting structure on the upper surface is placed on the upper side. By fixing, the fitting structure on the upper side of the L-type block base is fitted to fit the block-side fitting structure provided on the bottom of the vertical wall of the retaining wall L-type block. A basic construction method for retaining wall construction using L-shaped concrete blocks for retaining walls, characterized by constructing the structure.   The upper surface formwork is a fitting hole mold 4A provided with a downward projection, a longitudinal fitting groove mold 4B provided with a longitudinal downward projection, and a fitting recess mold 4C provided with a width downward projection. The retaining wall construction using the L-shaped concrete block for retaining walls according to claim 1, wherein the retaining wall construction includes a downward projecting portion and the like, and both are formed by a formwork having a missing portion for filling with additional concrete. Basic construction method.   The upper surface mold frame includes a projection mold frame 4F provided with an upward cylindrical body, a longitudinal projection mold frame 4G provided with a spacing hole between opposing walls of the upward or downward projection frame in the longitudinal direction or the width direction, and a width direction projection strip. It is constituted by a mold having an upward projecting portion such as a mold 4H for a step, a mold 4K for a step, and a single projecting mold 4J provided with a long hole surrounded by the periphery. A basic construction method for constructing a retaining wall using the L-shaped concrete block for retaining walls according to 1.   In the foundation construction of the retaining wall construction using the L-shaped block for retaining wall, the upper surface formwork with the downward projecting part is arranged on the upper surface side of the L-shaped block foundation base constructed on the upper surface of the foundation concrete on the foundation soil Then, by filling additional concrete, a fitting recess such as a fitting hole, a longitudinal fitting groove, a width fitting groove, two longitudinal steps, etc. is formed, and the L-shaped block base A retaining wall using an L-shaped block for retaining walls, characterized in that a base-side mating structure is provided on the upper surface to fit the block-side mating structure on the bottom of the vertical wall of the retaining wall L-shaped block. Foundation structure.   In the foundation construction of the retaining wall construction using the L-shaped block for retaining wall, the upper surface formwork with the upward projecting part is arranged on the upper surface side of the L-shaped block foundation base constructed on the upper surface of the foundation concrete on the foundation soil Then, by filling additional concrete, fitting projections such as fitting projections, longitudinal projections, width projections, etc. are molded, and the retaining wall L-type to be installed on the upper surface of the L-type block foundation A retaining wall foundation structure using a retaining wall L-shaped block, characterized in that a foundation-side fitting structure is provided to be fitted to the block-side fitting structure on the bottom surface of the vertical wall of the block.

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