JP2000240024A - Concrete protective wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save labor for construction to make it economically advantageous by dispensing with a coupler for connecting together steel bars and its connecting work, and facilitating the installation work of a stranded steel wire. SOLUTION: This is a concrete protective wall in which a plurality of concrete blocks respectively formed with steel material insert holes 4 are connected together by tension steel inserted into the steel insert holes while giving tension. In this case, a stranded steel wire 5 is used as tension steel, the one end of the steel material insert hole of the block 2 for fixing steel within a plurality of the concrete blocks is opened toward the crown part 2a of the block, and the end part of the stranded steel wire is fixed to the block for fixing steel material on this opening position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete protection wall used as a separation strip, a road side wall, a bridge railing, or the like of an expressway or a general road.

[0002]

2. Description of the Related Art As a concrete protective wall as described above, for example, as disclosed in Japanese Patent Publication No. 29492/1994, a plurality of concrete blocks each having a through hole for inserting a steel material for tension are used. Some steel materials are connected by applying tension.

Here, in a conventional concrete protection wall,
As shown in FIGS. 7 and 8, a PC steel bar 105 is generally used as a tension steel material. In this case, the construction of the protective wall is performed as follows.

First, concrete blocks 101 and 102 in a section of 50 to 60 m are set on an upper subgrade foundation 107. Next, the installation work of the concrete blocks is temporarily interrupted, and the PC steel bars 105 are inserted into the through holes 104 of each block. Then, the ends of the PC steel bars 105 are connected to each other by a coupler 110 arranged in a notch 103 formed at a side end of each block, and a joint mortar 108 between the blocks is filled with cement mortar.

Next, after the mortar is cured (for example, the next day)
Concrete block 1 to PC steel rod 105 connected to
After the tension bar is attached via the fixing support plate 111 disposed at the end of the PC steel bar 02 and the PC steel bar is tensioned, the nut 1
Tightening of the block 12 maintains the tension, and the blocks 101 and 102 are tightened to form a continuous body. Then, after the binding work of one connected body is completed, a block is installed in the next section, and thereafter, the same work is repeated.

[0006]

However, in the above-described construction method, 50 to 6 sections can be constructed in one day.
It is limited to a short length of about 0 m. This is limited by the actual length that the coupler 110 can move within the notch 103 without interfering with the block 101 due to the need to connect the PC steel bars using the coupler 110. It is.

[0007] In this way, since the section that can be constructed in one day is limited to a short section, there is a problem that the number of days required for constructing the entire protective wall is increased and the construction cost is increased.

In the above construction method, the notches 103 are formed in all the blocks, and all the notches 10 are formed.
Since it is also necessary to cover 3 with a cover or to bury it with cement, there is a problem that the amount of work at the time of block production and on-site work increases.

Further, in such a protective wall, for example, 1
When the blocks in the section are viewed as one block continuum, it is desirable to provide an expansion joint at a portion where the block continuations are adjacent to each other so that the expansion and contraction of the block continuity due to a temperature change can be absorbed. However, the above-described method using a PC steel rod has a problem that it is difficult to sufficiently exhibit its performance even if an expansion joint is provided.

[0010]

In order to solve the above-mentioned problems, in the present invention, a plurality of concrete blocks each having a steel material insertion hole are provided with a tension by a tension steel material inserted into the steel material insertion hole. A concrete protective wall which is connected by connecting a flexible stranded wire steel material such as a PC steel stranded wire as a tension steel material, and connecting one end of a steel material insertion hole of a steel material fixing block among a plurality of concrete blocks. An opening is made toward the top end of the block, and the end of the stranded steel material is fixed to the steel fixing block at this opening position.

As a result, first, the coupler for connecting the steel rods and the connecting operation thereof are not required, and the installation operation of the stranded wire steel material itself is easy. Is also advantageous.

Further, since the tension fixing operation of the stranded wire steel material can be performed only at the top end of the steel material fixing block,
Regardless of the work of filling cement mortar into joints and the like and the work of fixing and twisting the stranded wire steel material, long sections (for example, 150
m) blocks can be installed continuously at the highest construction speed.

Further, since it is not necessary to provide a cutout portion for tension fixing of the stranded steel material in the blocks other than the steel material fixing block, it is possible to easily manufacture the block and work on site.

The ends of a plurality of stranded steel materials for connecting concrete blocks arranged on both sides of the steel material fixing block may be fixed to one steel material fixing block.

This makes it possible to construct a long-section protective wall by using a small number of steel fixing blocks.

[0016] Further, a block continuum in which a plurality of concrete blocks are connected by a tension steel material is continuously provided,
Even when these continuous bodies are connected to each other by a continuous body connecting stranded wire steel material, a tension fixing method of the stranded wire steel material similar to the above may be used. This makes it possible to facilitate and speed up the connection of the continuum.

In this case, the tension given by the stranded wire material for connecting the continuous body is made somewhat smaller than the tension given by the stranded wire material connecting the concrete blocks of the block continuum, and the performance of the protective wall is improved. It is desirable that the function of the expansion joint portion provided in the adjacent portion of the continuum can be ensured without impairing the structure.

[0018]

1 to 4 show a concrete protective wall according to an embodiment of the present invention. This concrete protection wall is formed by connecting a plurality of precast concrete blocks 1 and 2 having a substantially trapezoidal cross-sectional shape by applying a tension to a PC steel stranded wire (twisted steel material) 5 subjected to anticorrosion treatment. I have.

In the precast concrete block used for the construction of the concrete protective wall, a general block 1 in which only an insertion hole 4 for inserting a stranded PC steel wire 5 is formed in the upper part of the block, and an insertion hole 4 are formed. There is a fixing block 2 in which a notch 3 for fixing the end of the stranded PC steel wire 5 is formed at the block top end 2a.

First, as shown in FIG. 2, one insertion hole 4 extending only in the block length direction is formed in the general block 1 in the upper part of the block.

As shown in FIG. 1, the fixing block 2 extends in the block length direction from the right end of the block 2 to the inside of the left side of the block while slightly biased toward the front side in the figure, and further extends obliquely upward. An insertion hole 4 ′ extending toward the top end 2 a and extending from the left end of the block 2 to the inside of the right side of the block while slightly biased toward the back in the figure;
Further, two insertion holes 4 ′ that bend obliquely upward and extend toward the top end 2 a are formed.

As shown in FIG. 3, these two insertion holes 4 'are formed side by side in the block thickness direction (the front side and the back side in FIG. 1) at the center of the block.

The ends of the insertion holes 4 'on the top end 2 side are formed on the left and right sides of the top end 2a, respectively, so as to form a substantially right triangle in front view as shown in FIG. The notch 3 is open at the bottom surface on the short side.

Further, although not shown in FIG. 1, the fixing block constituting the end of the protective wall may be formed with only one insertion hole opening toward the top end.

FIG. 4 shows the notch 3 in detail. On the short side bottom surface 3a of the cutout portion 3, a rectangular support surface portion 3a 'is formed, which is one step lower than the bottom surface 3a. The opening on the top end 2 side of the insertion hole 4 is provided at the center of the support surface 3a '. A portion 3c 'near the top end 2a on the long side bottom surface 3c is provided with a bottom surface 3c.
Slightly angled with respect to

When constructing a concrete protective wall composed of these blocks 1 and 2 on a road or the like, first, one construction section (for example, each block 1 and 2) on the upper subgrade foundation 7 formed one step below the pavement surface is formed. Assuming that the length 2 is about 5 m, a plurality of general blocks 1 and one fixing block 2 are alternately arranged in a section of about 150 m or more. A sheath (not shown) for passing the PC steel stranded wire 5 is arranged in a space adjacent to each block.

Next, the PC steel stranded wire 5 is inserted from the opening in the cutout 3 of the insertion hole 4 ′ of one of the two fixing blocks 2 sandwiching the plurality of general blocks 1. The other fixing block 2 is extended from the opening in the cutout 3 of the insertion hole 4 ′ of the other fixing block 2.

Dry mortar 6 is filled between each block and the upper subgrade foundation 7. In addition, the space adjacent to each block is filled with cement mortar,
Is formed.

Next, after the cement mortar of the joint portion 8 has hardened, the tension fixing operation of the PC steel stranded wire 5 is performed. More specifically, as shown in FIG.
PC steel stranded wire 5 extending from the opening in each cutout 3
At the end (actually, it has a surplus portion and extends long, but is omitted in the figure), through a fixing support plate 11 having a through hole formed in the center and a cylindrical fixing sleeve 12, a tension jack is provided. And the fixing wedge 13 is pushed in to apply tension to the PC steel stranded wire 5. Fixing support plate 11
Presses against the support surface 3 a ′ of the notch 3 to support the tension of the stranded PC steel wire 5. Thus, the fixing blocks 2 and 2 on both sides and the plurality of general blocks 1 sandwiched therebetween are connected in a state where a tension is applied.

After that, an extra portion (a portion that does not fit in the notch portion 3) of the end portion of the PC steel stranded wire 5 is cut, and the notch portion 3 is filled with cement mortar.

According to the present embodiment, the conventional protective wall using a PC steel rod as a tension steel material has a P
The coupler for connecting the C steel bar and the connecting operation thereof are not required. For this reason, construction becomes easy.

Further, since the tension fixing operation of the PC steel stranded wire 5 can be performed only at the top end 2a of the fixing block 2, the cement mortar filling operation into the joint portion 8 or the PC fixing operation can be performed.
Regardless of the tension fixing work of the steel stranded wire 5, the installation work of the block in a long section (for example, about 150 m) can be continuously performed at the highest construction speed.

Further, since the notch portion 3 needs to be provided only in a small number of fixing blocks 2, it is possible to easily manufacture a large number of general blocks 1. Further, since the work of filling the cutouts 3 with cement mortar only needs to be performed for a small number of cutouts 3, the on-site work can be facilitated.

Also, the ends of the two twisted PC steel wires 5 for connecting the blocks arranged on both sides of the fixing block 2 to one fixing block 2 are fixed. By using a small number of fixing blocks 2, a long-distance protection wall can be constructed.

Next, a case where block continuities (for example, a continuum forming one section of a concrete protection wall) composed of concrete blocks 1 and 2 connected as in the above embodiment are connected to each other will be described. This will be described with reference to FIGS.

In FIG. 5, two fixing blocks 2 arranged adjacent to each other form ends of two continuous bodies A and B to be connected.

As shown in FIG. 6, a stranded PC steel wire 5 used to connect the blocks in each of the continuous bodies A and B is inserted into these fixing blocks 2, and the ends of the strands are connected to the top surface 2a.
A single insertion hole 4 'for fixing is formed, and a block for inserting a PC steel stranded wire 45 for connecting a continuous body to be described later is inserted below the insertion hole 4'. An insertion hole 44 extending only in the length direction is formed.

In each of the continuum bodies A and B,
The fixing block 42 disposed adjacent to the two fixing blocks 2 is formed with an insertion hole 4 for inserting the same PC steel stranded wire 5 as the general block 1, and
An insertion hole 44 'is formed for inserting the stranded PC steel wire 45 for connecting the continuous body and fixing the end at the top end 42a. A portion of the insertion hole 44 ′ extending only in the block length direction is formed below the insertion hole 4.

The end of the insertion hole 44 'on the side of the top end 42a is open at the bottom surface on the short side of the notch 3 similar to that described with reference to FIG.

The block continuum A constructed as described above,
B, first, a PC steel stranded wire 4 for connecting a continuum from the opening in the cutout 3 of the insertion hole 44 ′ of one of the two adjacent fixing blocks 2.
5 is inserted into the other fixing block 2 through the insertion hole 4.
It extends from the opening in the notch 3 of 4 '.

Next, the continuum A, B (fixing block 2,
The expandable joint part 9 is formed by filling the expandable joint material in the adjacent space of 2). The expansion joint 9 absorbs expansion and contraction of each continuum due to a temperature change or the like.

Next, a tension fixing operation of the PC steel stranded wire 45 for connecting the continuous body and a cement mortar filling operation of the notch 3 are performed. The tension fixing operation is performed in the same manner as described above with reference to FIG.

Here, a stranded PC steel wire 45 for connecting a continuous body is used.
Is set to be slightly smaller than the tension applied to the stranded PC steel wire 5 used for connecting the blocks in each of the continuous bodies A and B. Thereby, while the function of the above-mentioned expansion joint part 9 can be fully exhibited, the performance as a protective wall at the time of a collision of vehicles etc. can also be fully ensured.

The position of the fixing block 42 for fixing the PC steel stranded wire 45 for connecting the continuous body in the continuous body is as follows.
It is not limited to the one shown in FIG. Moreover, you may make it fix the PC steel stranded wire 45 to the fixing block 2 which comprises the edge part of a continuous body.

[0045]

As described above, according to the present invention,
First, since stranded wire steel is used as the tension steel,
The conventional protective wall using steel bars eliminates the need for couplers for connecting steel bars and their connection work,
Since the installation work of the stranded wire steel material itself is easy, labor saving of construction can be achieved, and an economically advantageous concrete protective wall can be realized.

Further, according to the present invention, one end of the steel material insertion hole of the steel material fixing block among the plurality of concrete blocks to be connected is opened toward the top end of the block, and the end of the stranded steel material is opened at this opening position. Since the portion is fixed to the steel fixing block, the tension fixing operation of the stranded steel material can be performed only at the top end of the steel fixing block. Therefore, regardless of the work of filling cement mortar into joints and the like and the work of fixing tension of stranded wire steel, it is possible to continuously perform the installation work of a block of one long section (for example, about 150 m) at the highest construction speed. it can.

Further, it is not necessary to provide a cutout for fixing the stranded steel material in the blocks other than the steel material fixing block, so that block production and on-site work can be facilitated.

In addition, if one steel fixing block is fixed to the ends of a plurality of stranded wire steels for connecting concrete blocks arranged on both sides of the steel fixing block, a small number can be obtained. By using the steel fixing block, a long section protective wall can be constructed.

Further, in a case where a block continuous body formed by connecting a plurality of concrete blocks with a tension steel material is connected to form a protective wall, and these continuous bodies are connected to each other by a stranded wire steel material for connecting a continuous body. By using the same technique of tensioning and fixing a stranded wire steel material as described above, the connection operation of the continuum can be facilitated and speeded up.

In this case, if the tension given by the stranded wire steel for connecting the continuous body is made somewhat smaller than the tension given by the stranded wire steel connecting the concrete blocks of the block continuum, the protection wall can be used. The function of the expansion joint provided in the adjacent part of the continuum can be secured without impairing the performance of the above.

[Brief description of the drawings]

FIG. 1 is a front view of a concrete protection wall according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line aa of the concrete protection wall of FIG.

FIG. 3 is a sectional view taken along line bb of the concrete protection wall of FIG. 1;

FIG. 4 is a perspective view of a notch formed at a top end of a fixing block constituting the concrete protection wall.

FIG. 5 is a front view of a concrete protection wall formed by connecting a continuous block of blocks according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along the line cc of the concrete protection wall of FIG. 5;

FIG. 7 is a front view of a conventional concrete protection wall.

FIG. 8 is a sectional view taken along line dd of the concrete protection wall of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 General-purpose block 2,42 Fixing block 3 Notch 4,4 ', 44,44' Inserting hole 5,45 PC steel stranded wire 6 Dry mortar 7 Upper roadbed foundation 8 Joint 9 Extension joint 11 Fixing support Press plate 12 Fixing sleeve 13 Fixing wedge 105 PC steel bar 110 Coupler

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 1, 1999 (1999.3.1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

Next, after the mortar is cured (for example, the next day)
Concrete block 1 to PC steel rod 105 connected to
02 for tension through fixing support plate 111 arranged at the end of
After the PC steel rod is tensioned after the jack is attached, the tension is maintained by tightening the nut 112, and the blocks 101 and 102 are tightly connected to form a continuous body. Then, after the binding work of one connected body is completed, a block is installed in the next section, and thereafter, the same work is repeated.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

As shown in FIG. 1, the fixing block 2 extends in the block length direction from the right end of the block 2 to the inside of the left side of the block while slightly biased toward the front side in the figure, and further extends obliquely upward. extends, the insertion hole 4 'which opens towards the Tentan portion 2a, extends from the left end of the block 2 to the internal block right while biased slightly Figure Nakaoku side crest extends further bent obliquely upward Two insertion holes 4 'opening toward the portion 2a are formed. ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 22, 1999 (1999.12.
22)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Deleted

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

In such a protective wall, for example, when a block in one section is viewed as one continuous block, an expansion joint portion is provided at a portion where the continuous block is adjacent to each other, and a change in temperature is caused. It is desirable to be able to absorb the expansion and contraction of the block continuum. However, in the above method of using a PC steel rod, even if provided with the expansion joint portion, there is a problem that it is difficult to sufficiently exhibit its performance.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

In order to solve the above-mentioned problems, according to the present invention, a plurality of concrete blocks are tightened.
Blows connected by applying tension to stranded wire steel
On a concrete protective wall constructed by connecting
Of any of the above block continuum
The block blocks are connected to each other by applying tension to the block blocks.
Insertion hole for inserting stranded wire steel material for connecting continuous body to be connected
With one end of this insertion hole facing the top end of the block.
Open the stranded wire steel material for continuous body connection at this opening position.
Fix the end to the concrete block and
A stretchable joint is provided in the adjacent part of the lock continuum,
The tension given by the stranded wire steel
The tension that connects each concrete block of the lock continuum
Less than the tension given by the stranded wire steel
ing. This facilitates the connection work of the block connection body
It is possible to increase the speed and speed, and
The extension provided adjacent to the continuum without impairing the performance
It becomes possible to secure the function of the shrinkage joint.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Deleted

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Deleted

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Deleted

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Deleted

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Deleted

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Deleted

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Deleted

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

Further, each end of the top end portion 2 a side of the insertion hole 4 ', the left and right Tentan portion 2a, as shown in FIG. 1, formed in a substantially right-angled triangular shape in a front view The cutout 3 is open at the bottom surface on the short side.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

FIG. 4 shows the notch 3 in detail. On the short side bottom surface 3a of the cutout portion 3, a rectangular support surface portion 3a 'is formed, which is one step lower than the bottom surface 3a. The opening at the top end 2a side of the insertion hole 4 is provided at the center of the support surface 3a '. In addition, a portion 3c 'near the top end 2a on the long side bottom surface 3c is provided with a bottom surface 3c.
It is slightly angled with respect to c.

[Procedure amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

According to the present embodiment, the conventional protective wall using a PC steel rod as a tension steel material has a P
Couplers and the connection work for connecting the C steel bar is not required <br/>. For this reason, construction becomes easy.

[Procedure amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

[0037] These fixing block 2, as shown in FIG. 6, the continuous body A, it is inserted the PC steel strand 5 to be used in connection of the blocks in the B, top end 2a of the end portion
A single insertion hole 4 'for fixing is formed, and a block for inserting a PC steel stranded wire 45 for connecting a continuous body to be described later is inserted below the insertion hole 4'. An insertion hole 44 extending only in the length direction is formed.

[Procedure amendment 18]

[Document name to be amended] Statement

[Correction target item name] 0045

[Correction method] Change

[Correction contents]

[0045]

As described above, according to the present invention,
Any concrete block in the block continuum
Continuum that connects block continuum to each other by applying tension
An insertion hole for inserting the stranded wire steel for connection is formed,
Open one end of the insertion hole toward the top of the block.
At the opening position of the strand
Affixes to the REIT block and the block continuum
A stretchable joint is provided in the adjacent area of
The tension given by the stranded wire material is
Strand wire steel for connecting each concrete block
Since it is smaller than the tension given by the material,
To facilitate and speed up the connection work of block connected bodies
Can be connected and without losing the performance of the protective wall.
Ensuring the function of expansion joints provided adjacent to the continuum
be able to.

[Procedure amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Deleted

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Deleted

[Procedure amendment 21]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Deleted

[Procedure amendment 22]

[Document name to be amended] Statement

[Correction target item name] 0049

[Correction method] Deleted

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Deleted

[Procedure amendment 24]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

Claims (8)

[Claims] 1. A concrete protection wall comprising a plurality of concrete blocks each having a steel material insertion hole formed therein and connected by applying tension to the steel material for insertion inserted in the steel material insertion hole by applying tension. One of the plurality of concrete blocks is opened at one end of the steel material insertion hole of the steel fixing block toward the top end of the concrete block, and at the opening position, the end of the stranded wire steel is fixed to the steel material. A concrete protective wall that has been anchored to a building block. 2. The concrete according to claim 1, wherein a notch is formed at the top end of the steel material fixing block, and one end of the steel material insertion hole is opened in the notch. Protective wall. 3. An end of a plurality of stranded steel materials for connecting concrete blocks disposed on both sides of the steel fixing block to the steel fixing block, respectively, is fixed to the steel fixing block. 3. The concrete protective wall according to 1 or 2. 4. A concrete protection wall comprising a plurality of concrete blocks connected to each other by applying tension to a plurality of concrete blocks by using a tension steel material, wherein the concrete block includes any one of the concrete blocks in each of the block continuous bodies. Forming an insertion hole for inserting a continuous body connecting stranded wire steel material that connects the block continuous bodies to each other by applying tension, and opening one end of the insertion hole toward the block top end,
The concrete protection wall according to any one of claims 1 to 3, wherein an end portion of the continuous body connecting stranded wire steel material is fixed to the concrete block at the opening position. 5. The concrete protection wall according to claim 4, wherein a notch is formed in the top end, and one end of the insertion hole is opened in the notch. 6. A stretchable joint portion is provided adjacent to the block continuum, and the tension given by the continuum connection stranded wire steel material is used to connect each concrete block of the block continuum to a stranded wire. 5. The structure according to claim 4, wherein the tension is smaller than a tension given by the steel material.
Or the concrete protective wall according to 5. 7. The block continuum comprises a plurality of concrete blocks, each having a steel material insertion hole formed therein, connected by applying tension to the stranded wire steel material inserted into the steel material insertion hole, and One end of the steel material insertion hole of the steel material fixing block among the blocks is opened toward the block top end, and at this opening position, the end of the stranded steel material is fixed to the steel material fixing block. A concrete protective wall according to any of claims 4 to 6. 8. The length of each block continuum is 150
The concrete protective wall according to claim 7, wherein the diameter is about m.