JPS58120924A - Block for assembling retaining wall - Google Patents

Abstract

PURPOSE:To simplify construction of a retaining wall even if it is high, by a method wherein a side wall is formed in an erecting manner at one side of a horizontal foundation part to form it in an L-shaped configuration, a male locking member is formed on the upper end of the side wall, and a female locking member is formed in the lower end surface of the side wall of the horizontal foundation part. CONSTITUTION:A side wall 3 having a sweep hole 6 is formed in an erecting state at one side of a horizontal foundation part 2 to form it in an L-shaped configuration, while a male locking member 4 is formed on the upper end of the side wall 3, and a female locking member 5 formed in the lower end surface of the other wall of the horizontal foundation part 2. The construction of a retaining wall is such that a pit is excavated in a ground 7, rubbles 8 are placed and levelled, and after levelling concrete is placed thereon, a block 1 group of a first layer is placed in a chain. After a back-filing 10 is conducted on the inner surface of the retaining wall 3, the pit excavation is refilled, and a first refilled layer 11 is formed by compacting with a roller to the same level as the upper end of retaining members 4. Further, a block 1' of a second layer is piled on the block 1 group to form a second refilled layer 11' in a similar method as described in the first layer. A block 1' group of a third layer and the following block groups are formed in a similar manner to construct a retaining wall A with a required height having an inclining slope.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of blocks constituting a prefabricated retaining wall.

Conventionally, prefabricated retaining walls constructed on roads, seawalls, residential development sites, etc. are (1) those constructed using various types of walls or parallel walls using the masonry method (Tokuko Sho 47-23843, Tokko Sho 47-23843, 51-6966, Japanese Patent Publication No. 52-48410, etc.), (2) Concrete sheet piles are closely penetrated into the soil and the sheet piles in each row are connected with concrete pillows, etc. 10), (3) Gravity-type retaining wall in which walls are installed parallel to the soil and the space between them is backfilled with earth and sand (Japanese Patent Publication No. 15981/1972), and (4)
Retaining walls are roughly divided into four types: those constructed of soil, reinforcing material embedded in the soil, and exterior materials for holding the sides of the reinforced soil reinforced by the reinforcing material.

However, retaining walls according to (1) to (3) above require many combination processes, and there are problems in constructing large and high retaining walls (8111 and above) in Tonosho, and those according to (4) are difficult to construct high retaining walls. However, it is complicated to connect each exterior member to reinforcing materials such as copper strips with bolts and nuts, and there are problems such as the connection fittings deteriorating due to electrolytic corrosion and decreasing strength. Ta.

The present invention was made in view of the above-mentioned problems, and by improving the shape or structure of the blocks that make up the retaining wall, even in the case of a high retaining wall, construction is extremely easy and it has stable strength. Moreover, it is possible to construct an economical prefabricated retaining wall with fewer assembly steps and low construction costs.

Hereinafter, the present invention will be explained based on the drawings.

In Figures 1 and 2, 1, 1', 1''... are m
The walls are made of concrete blocks, and each block has an L-shaped cross section with a side wall 3 erected on one side of the horizontal base 2, and the inside of the block has multiple reinforcing bars ( (not shown) is provided. Reference numeral 4 denotes a convex locking member formed along the upper end portion of the side wall 3. Corresponding to the locking member 4, on the lower surface of the side wall side of the horizontal base portion 2,
A concave locking receiving member 5 is formed. 6 is a drain hole formed in the side wall 3.

In the illustrated example, the side walls 3 are inclined with respect to the horizontal base portion 2, but when constructing a vertical slope, those provided perpendicularly are used. Further, it is preferable that the rising base portions 3a, jlQ of the side wall 3 and the joining portions of the horizontal base portion 2 and the side wall 3 are thicker than their respective free ends to cope with the bending moment due to the bending force.

Next, a method of constructing a retaining wall from the blocks 1.1', 1'', . . . according to the present invention will be explained with reference to FIG.

First, the ground 7 on which the retaining wall will be constructed is dug, thoroughly compacted, and laid with split stones 8. After pouring concrete 9 on top of it, a group of blocks for the first layer is chained on top of it. The inner surface of the side wall 3 is backfilled with 10 holes.
A first backfill 111 is formed at the same level as the tip of the side wall 3, that is, the two ends of the locking member 4, while rolling.

Next, the second layer block group 1' is stacked on the first layer block 1 group. That is, the convex locking member 4 of block 1 group is fitted and fixed to the concave lock receiving member 5 of block 1' group. Next, in the same way as the first layer, the inner surface of the side wall 3 of the block 1' group is backfilled with 10 holes, and a second backfilling layer 1 is formed.
1′ is formed.

Thereafter, in the same manner, the third layer block 1'' group is installed,
A retaining wall A having an inclined slope of a desired height is constructed in the order of backfilling and backfilling. In the illustrated example, the block 1 of the first layer serving as the foundation is a block 1 in which the lock receiving member 5 protruding from the lower surface of the horizontal base portion 2 is omitted. The same applies to the following examples.

@3 Figure is a perspective view of a block showing another embodiment of the present invention,
FIG. 4 is a sectional view of the retaining wall.

That is, the L-shaped blocks 12, 12', 12''... have a configuration in which the side wall 3 is erected on one side of the horizontal base portion 2, as described above, but the upper end of the side wall 3 is A step 13 as a locking member is recessed on the inside, and a step 14 as a lock receiving member is recessed on the outside of the horizontal base portion 2, and each block 12.12', 12'' . . . Pile through holes 15 are provided in horizontal base portions 2 at vertically aligned positions. In addition, this L-shaped block 12.12',
12"... have embedded holes 16 to prevent lateral displacement.
It is preferable to provide the anchor bolt 17 so that the anchor bolt 17 can be inserted therein.

To construct a retaining wall using the blocks 12, 12', 12'', etc., as shown in FIG. The first layer of block 12 is inserted and installed from above the pile 18 using a crane or the like (not shown), and the pile 18 and the pile through hole 15 are installed.
Concrete 19 is filled and placed in between, and then backfilling and backfilling are performed to form backfilling layers 11, 11', etc. in order, thereby forming the retaining wall B of the inclined slope. In addition, 20 is a drainage ditch, 21
22 is an auxiliary stake for the stake 18, which is connected by a chain 23. Incidentally, the driving of the piles X8 may be performed after the first layer of blocks is installed.

In the case of the retaining wall B using the above piles 18, the joints between the upper and lower blocks 12 and 12', +2' and 12'' (fitting of the steps 13 and 14), and the horizontal base Each block 12.12', 1
2"... forms a strong rigid frame structure, resulting in an extremely stable retaining wall structure.In other words, each block is structurally advantageous by being integrated with the piles, so the retaining wall material can be made thinner. It is possible to reduce the weight of the comb and reduce manufacturing costs.In addition, the horizontal resistance can be shared by the piles, and in addition to forming a rigid frame structure as each block and retaining wall as a whole, backfilling in each of the bridges and piles can be By driving near the imaginary rear surface, the row of piles will receive the earthen wall, and the whole will form a type of gravity-type retaining wall.

FIG. 5 is a perspective view of a block showing another embodiment of the invention.

That is, the block 24 is provided with a fitting part 25 extending parallel to the horizontal base part 2 as a locking member at the upper end of the side wall 3, and is formed in a cross-sectional shape, and has a locking part 25 on the lower surface of the horizontal base part 2. It has a configuration in which a fitting receiving portion 26 is formed as a member.

This fitting part 25 is made sufficiently shorter than the length of the horizontal base part 2 so as not to interfere with backfilling.

FIG. 6 is a perspective view of a block showing still another embodiment of the present invention, in which a cutout opening 27 is provided in the fitting portion 25 of the block 24, and the horizontal base portion 2 is provided with a notch opening 27 similar to that in FIG. 3. A pile through hole 15 is provided in the block 28 to form a separate block 28. Furthermore, in FIG. 7, buttresses 29 are provided on both sides of the block 28 to form a separate block 30. In this case, the space between the upper fitting part 25 and the horizontal base part 2 is reinforced, and the bearing capacity against the tosho is increased. You can get a large amount of

Figure 8 shows the double-shaped blocks 24 and 24' shown in Figure 5 above;
24''... are stacked in the same manner as in Fig. 2 to construct a retaining wall C having an inclined slope.In this case, the fitting part 25 extending parallel to the horizontal base part 2 of each block is It functions as a kind of intermediate shelf.As a result, by stacking the blocks 24, 24', 24'', etc. of the present invention, a shelf-type retaining wall can be formed very easily.

In other words, the shelf-type retaining wall has been proposed as a method for reducing the active earth pressure in the intermediate shelf and the stress within the retaining wall member, but it is difficult to construct the shelf in one piece. However, by using the blocks 24, 24', 24'', etc. of the present invention, it can be easily constructed using the same procedure as the construction of ordinary prefabricated retaining walls. becomes possible.

FIGS. 9 and 10 show another example of application of the present invention, in which a road is constructed using earth. In the figure, 3
1.31', 31''... are blocks in which the side wall 3 of the block 24 is installed perpendicularly to the horizontal base part 2, and each block has a pile 33, 34 penetrated into the ground 32 and a chain or lobe. A retaining wall having a vertical slope is formed by connecting and reinforcing reinforcing materials 35 made of As shown in FIG. 11, members such as a pipe 36, a plate piece 37, and a prismatic body 38 are interposed at appropriate intermediate positions of the reinforcing material 35 to prevent the reinforcing material 35 from sinking and slipping.

In addition, 39 is a foundation pile.

FIG. 12 shows still another example of application of the present invention, in which the third
A block 40 in which the side walls 3 of the L-shaped blocks 12, 12', 12'', etc. shown in the figure are perpendicular to the horizontal base 2
．． 40', 40'', etc. are examples of constructing retaining walls with vertical slopes using the ground.In this case, the above 9th
In addition to the piles 33 and 34 that penetrated the ground 32 in the figure, the pile penetration holes 1 in each block 4Q, 40', 40''...
5, the entire retaining wall E becomes a rigid frame structure, resulting in a more stable structure.

As explained above, the prefabricated retaining wall block of the present invention has a side wall erected on one side of the horizontal base part to form an L-shaped cross section, and a locking member at the upper end of the side wall. Alternatively, a locking receiving member is provided, and a locking receiving member or a locking member corresponding to the locking member or locking receiving member is provided on the lower surface of the side wall side of the horizontal base portion, or a pile is provided through the horizontal base portion. Since it has an extremely simple structure with holes, its shape and size can be freely changed, and lightweight blocks can be manufactured at low cost.

In addition, since the structure of the block is simple, it is easy to assemble even in the case of a high retaining wall, and the upper and lower blocks are fixed by fitting the locking member and the locking receiving member, and each block Since the horizontal foundation is restrained by the backfill layer, it has stable strength without the risk of slipping or collapsing, and by using piles together, it forms a rigid frame structure, making it possible to construct an even stronger retaining wall. Can be done.

Furthermore, the retaining wall construction sequence is a simple repetition of the following steps: ground leveling, piling, pile driving (sometimes omitted), first layer block installation, and backfilling, so the construction period is short. ,
Economical. Moreover, since it is prefabricated, wall surface processing can be done freely.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the block of the present invention;
The figure is a sectional view of a retaining wall using the same block as above, FIG. 3 is a perspective view showing another embodiment of the block of the present invention, FIG. 4 is a sectional view of a retaining wall using the same block as above, and FIGS. 7 is a perspective view showing another embodiment of the block of the present invention,
FIG. 8 is a sectional view of a retaining wall using the blocks shown in FIG. 5, FIGS. is an explanatory diagram of a reinforcing material, and FIG. 12 is a sectional view of a retaining wall showing another example of application of the present invention. 1.1', 1"..., 12.12', 12"...
・, 24.24', 24''..., 28.30.31.
31', 31"..., 40.40', 40"...
Block, 2...Horizontal base part, 3...Side wall. 4.13.25...Locking member, 5.14.26.
...Latching member. 15...Pile penetration hole. Patent applicant: Tokyu Construction Co., Ltd. Figure 4, 26

Claims (1)

[Scope of Claims] 1) A side wall is erected on one side of the horizontal base part to form a roughly L-shaped cross section, and a locking member or a locking receiving member is provided at the upper end of the side wall. An assembly type retaining wall block comprising a lock receiving member or locking member corresponding to the locking member or lock receiving member on the lower surface of the side wall of the horizontal base portion. 2) A side wall is erected on one side of the horizontal base part to form an L-shaped cross section, and a locking member or a locking receiving member is provided at the upper end of the side wall, and the side wall side of the horizontal base part is provided with a locking member or a locking receiving member. A prefabricated retaining wall block comprising a locking member or locking member corresponding to the locking member or locking receiving member on the lower surface, and a pile through hole provided in the horizontal base portion.