JP2019124036A - Self-supporting retaining wall and connection block - Google Patents

Self-supporting retaining wall and connection block Download PDF

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JP2019124036A
JP2019124036A JP2018004836A JP2018004836A JP2019124036A JP 2019124036 A JP2019124036 A JP 2019124036A JP 2018004836 A JP2018004836 A JP 2018004836A JP 2018004836 A JP2018004836 A JP 2018004836A JP 2019124036 A JP2019124036 A JP 2019124036A
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wall
block
connection
retaining wall
longitudinal
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JP6343727B1 (en
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佐藤 克彦
Katsuhiko Sato
克彦 佐藤
佳勝 渡辺
Yoshikatsu Watanabe
佳勝 渡辺
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Travers Corp
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Abstract

To provide a self-supporting retaining wall and a connection block capable of exerting high rigidity and construction performance with a relatively small configuration.SOLUTION: A self-supporting retaining wall connects a hollow box-shaped standard block 12 in the lateral direction of a vertically stacked hollow box-shaped connection block 11, the connection block has a connecting hole which penetrates up and down, and adjacent connection blocks and standard blocks communicate with each other in the vertical and horizontal directions to form a casting space inside. A wall material 10, a reinforcement material 20 arranged longitudinally and transversely in the casting space, a support pile which is embedded in the ground below the wall material and the support portion is located in the connection hole, and filler placed in the casting space are provided. The connection hole is in communication with the casting space, so as to form a one-piece connection structure of the filler, the reinforcement material, and the support pile inside the wall material.SELECTED DRAWING: Figure 1

Description

本発明は、自立式擁壁及び連結ブロックに関し、特に施工性が高く、比較的小規模な構成でもって高い剛性を発揮可能な自立式擁壁と、この自立式擁壁を構成する連結ブロックに関する。   The present invention relates to a freestanding retaining wall and a connecting block, and more particularly to a freestanding retaining wall capable of exerting high rigidity with a relatively small construction with high workability and a connecting block constituting the freestanding retaining wall. .

傾斜地における宅地造成工事では、切土や盛土によって形成された段差部の崩壊を防ぐため谷側の端部に擁壁を構築する。
擁壁のうちL型擁壁は、背面土圧に対し躯体の自重と裏込め土砂の重量で抵抗し、転倒と滑動に対する安定性を確保する構造である。
特許文献1及び2には、擁壁の残置型枠として使用可能な中空箱型のコンクリートブロック(いわゆるCPブロック)を用いてなるL型擁壁が開示されている。
このL型擁壁は、非特許文献1に開示されている通り、(1)地盤の掘削、(2)捨てコンクリートの打設、(3)基礎部の配筋、(4)基礎コンクリートの打設、(5)CPブロックの配置、(6)壁面部の配筋、(7)壁面部のコンクリート打設、等の手順を経て施工される。
In residential land construction work on slopes, a retaining wall is constructed at the end of the valley side to prevent the collapse of the step part formed by cuttings and fillings.
Among the retaining walls, the L-shaped retaining wall resists back surface pressure with the weight of its own weight and the weight of backfill soil, and has a structure that ensures stability against falling and sliding.
Patent Documents 1 and 2 disclose an L-shaped retaining wall formed of a hollow box-shaped concrete block (so-called CP block) that can be used as a retaining form of retaining wall.
As disclosed in Non-Patent Document 1, this L-shaped retaining wall is (1) excavating the ground, (2) casting of discarded concrete, (3) reinforcement of the foundation section, (4) striking of the foundation concrete Installation will be carried out through procedures such as (5) arrangement of CP block, (6) reinforcement of wall surface, (7) concrete placement of wall surface, etc.

特開平7−259214号公報JP-A-7-259214 実開平6−79914号公報Japanese Utility Model Application Publication 6-79914

「CP型枠III型自立式擁壁標準施工マニュアル」[平成30年1月11日検索]URL:http://www.blex-net.jp/wp/wp-content/uploads/2017/11/cp_sekoumanual-ilovepdf-compressed.pdf"CP formwork type III free standing retaining wall standard construction manual" [search January 11, 2018] URL: http://www.blex-net.jp/wp/wp-content/uploads/2017/11/ cp_sekoumanual-ilovepdf-compressed.pdf

従来技術には以下のような問題点がある。
[施工上の課題]
<1>底板の体積が大きいため、根切り量が多く、捨てコンクリートや基礎コンクリートの打設量が多い。よって、施工コストと材料コストが嵩み、工期が長くかかる。
<2>底板部分や、曲げモーメントが大きく作用する壁面との取り合い部分に複雑な配筋が必要となる。このため、施工難度が高く、作業効率が悪い。
<3>配筋の施工難度が高く、鉄筋工の熟練した技術に依存する部分が多い。このため、繁忙期に職人不足で施工に支障をきたす恐れがある。
<4>鉄筋コンクリート構造のみによって曲げ剛性を負担するため、壁面部分に密な配筋が必要となる。このため、鉄筋量が増えて材料コストが嵩む。また、作業量が多いため施工コストが嵩む。
<5>基礎コンクリートの養生が終わるまでCPブロックを設置できないため、手待ち時間が多く、作業効率が悪い。
[構造上の課題]
<1>擁壁の自重が大きいため、地盤が軟弱な場合、杭基礎や地盤改良による大規模な補強が必要となり、補強費用がかさむ。
<2>背面土の埋め戻し量が多いため、圧縮沈下による敷地の不同沈下が生じやすい。
<3>地震などで想定外の土圧が作用した場合、背面土の側方移動により、擁壁が滑動し転倒するおそれがある。
<4>隣地が高い敷地に設置する場合、擁壁の高さに応じて底板の奥行が非常に大きくなる。ここで、底板が建物の設置位置に重なると、基礎補強に加え杭基礎や地盤改良による大規模な補強工事が必要となるため、補強費用がかさむ。
The prior art has the following problems.
[Problems in construction]
<1> Because the volume of the bottom plate is large, the amount of root cutting is large, and the amount of cast-off concrete and foundation concrete is large. Therefore, construction cost and material cost increase, and the construction period takes a long time.
<2> A complicated arrangement of bars is required at the bottom plate portion and at the connecting portion with the wall surface where the bending moment acts largely. For this reason, the degree of construction difficulty is high and the work efficiency is poor.
<3> The construction difficulty of the rebar is high, and there are many parts that depend on the skill of rebar construction. For this reason, there is a possibility that construction work may be disturbed by lack of craftsmen during a busy season.
In order to bear bending rigidity only by <4> reinforced concrete structure, it is necessary to arrange dense rebars on the wall portion. For this reason, the amount of reinforcing bars increases and the material cost increases. In addition, the construction cost is high because the amount of work is large.
<5> Since the CP block can not be installed until curing of the foundation concrete is completed, there are many manual waiting times and the working efficiency is poor.
[Structural problem]
<1> Because the weight of the retaining wall is large, when the ground is soft, large-scale reinforcement by pile foundation or ground improvement is required, which increases the cost of reinforcement.
<2> Because the backfill amount of back soil is large, it is easy to cause uneven settlement of the site due to compression settlement.
When unexpected earth pressure acts by a <3> earthquake etc., there is a possibility that a retaining wall may slide and fall by lateral movement of back soil.
When it installs in the site where a <4> next place is high, the depth of a baseplate becomes very large according to the height of a retaining wall. Here, if the bottom plate overlaps the installation position of the building, a large-scale reinforcement work by pile foundation and ground improvement is needed in addition to the foundation reinforcement, and the reinforcement cost is increased.

本発明の目的は、以上のような問題点を解決できる自立式擁壁及び連結ブロックを提供することにある。   An object of the present invention is to provide a freestanding retaining wall and a connecting block that can solve the above problems.

以上の問題を解決する本発明の自立式擁壁は、連結ブロックと標準ブロックを接続してなり、連結ブロックが連結孔を有し、内部に打設空間を有する壁面材と、配筋材と、支柱杭と、充填材と、を備え、壁面材の内部に連結構造体を構成したことを特徴とする。   The self-supporting retaining wall of the present invention for solving the above problems is formed by connecting a connection block and a standard block, and the connection block has a connection hole, and a wall material having a placement space inside, a reinforcing member and , And a filler material, and the connection structure body is configured inside the wall surface material.

本発明の自立式擁壁は、連結ブロックが、壁面部と控え部と2つのウェブ部を備え、連結孔がそれらの間に画設されていてもよい。   In the self-supporting retaining wall of the present invention, the connection block may include a wall portion, a butt portion and two web portions, and a connection hole may be defined therebetween.

本発明の自立式擁壁は、ウェブ部の側面に縦溝を有し、ウェブ部の上下面に横溝を有し、連結ブロックと標準ブロックの間に縦ループ領域が画設され、連結ブロックの横溝間に横ループ領域が画設されてもよい。   The freestanding retaining wall of the present invention has longitudinal grooves on the side of the web portion, has lateral grooves on the upper and lower surfaces of the web portion, and defines a longitudinal loop area between the connection block and the standard block. A lateral loop region may be defined between the lateral grooves.

本発明の自立式擁壁は、連結ブロックが左右分割体を組み合わせてなってもよい。   In the freestanding retaining wall of the present invention, the connecting block may be a combination of left and right divided bodies.

本発明の自立式擁壁は、配筋材が縦筋と横筋と接続筋を備え、横筋と接続筋で支柱杭を包囲していてもよい。   In the self-supporting retaining wall of the present invention, the rebars may include longitudinal and transverse bars and connecting bars, and the horizontal bars and the connecting bars may surround the column pile.

本発明の自立式擁壁は、配筋材が縦筋と横筋を備え、縦筋が横筋より小径であってもよい。   In the self-supporting retaining wall of the present invention, the rebar may be provided with longitudinal and transverse bars, and the longitudinal bars may be smaller in diameter than the transverse bars.

本発明の自立式擁壁は、支柱杭が改良体と芯材からなってもよい。   In the self-supporting retaining wall of the present invention, the post pile may be composed of the improved body and the core material.

本発明の連結ブロックは、壁面部と、控え部と、2つのウェブ部と、連結孔と、を備え、ウェブ部の側面側に縦溝を有し、ウェブ部の上下面側に横溝を有し、壁面材を構成した状態において、連結ブロックと標準ブロックの間に縦ループ領域が形成され、連結ブロックの横溝間に横ループ領域が形成され、連結領域、縦ループ領域、および横ループ領域が連通して、打設空間を構成可能であることを特徴とする。   The connection block of the present invention includes a wall surface portion, a projection portion, two web portions, and a connection hole, has a longitudinal groove on the side of the web portion, and has lateral grooves on the upper and lower surface sides of the web portion. When the wall material is configured, a longitudinal loop region is formed between the connection block and the standard block, a lateral loop region is formed between the lateral grooves of the coupling block, and a coupling region, a longitudinal loop region, and a lateral loop region are formed. In communication with each other, a placement space can be configured.

本発明の連結ブロックは、左右分割体を組み合わせてなってもよい。   The connection block of the present invention may be a combination of left and right divided bodies.

本発明の自立式擁壁及び連結ブロックは、以上の構成を備えるため、次の効果のうち少なくとも一つを備える。
[施工上の効果]
<1>底板を備えないため、広範囲の根切りや基礎コンクリートの打設、基礎配筋等の作業が必要ない。このため、作業効率が非常に高く、施工コストと材料コストを大幅に削減できる。
<2>壁面材の曲げ剛性を支柱杭が負担するため、壁面材内に密な配筋が必要ない。このため、作業効率が高く、施工コストと材料コストを大幅に削減できる。また、熟練工でなくても容易に施工することができる。
<3>ブロックの数と配筋材の長さを調整するだけで、壁面材の高さや幅を適宜設定できる。
<4>ブロックとして現場搬入、施工ができるため、大型の重機が必要なく、狭隘な敷地でも施工できる。
[構造上の効果]
<1>H鋼と鉄筋コンクリートとブロック体からなる一体構造によって、比較的小規模な構成でもって高い剛性を発揮し、壁面材に作用する背面土圧を土中の杭部に有効に伝達して支持することができる。
<2>擁壁の自重が小さいため、支柱杭を深く根入れすることで、軟弱地盤においても地盤改良等によって大規模な補強を行う必要がない。このため、支柱杭の間隔を大きくすることができる。
<3>背面土の埋め戻し量が少ないため、敷地の不同沈下が生じにくい。
<4>剛性が高く支柱杭の根入れが深いため、想定外の土圧が生じても滑動しない。
<5>隣地の高低に関わらず、仕様を大幅に変更することなく適用できるため、汎用性が高い。
The self-supporting retaining wall and the connection block of the present invention have at least one of the following effects in order to have the above configuration.
[Effect on construction]
<1> Since the bottom plate is not provided, there is no need for extensive rooting, foundation concrete placement, and foundation reinforcement work. Therefore, the work efficiency is very high, and the construction cost and the material cost can be reduced significantly.
<2> Since the support pile bears the bending rigidity of the wall surface material, it is not necessary to arrange dense reinforcement in the wall surface material. Therefore, the working efficiency is high, and the construction cost and the material cost can be significantly reduced. Moreover, even if it is not a skilled worker, construction is easy.
The height and width of the wall surface material can be appropriately set only by adjusting the number of blocks and the length of the rebar.
As it is possible to carry in the site as a <4> block and construct it, there is no need for large heavy equipment, and construction can be done on narrow sites.
[Structural effect]
By an integrated structure consisting of <1> H steel, reinforced concrete and a block body, it exerts high rigidity with a relatively small scale construction, effectively transmitting the back earth pressure acting on the wall material to the pile section in the soil It can be supported.
<2> Since the self-weight of the retaining wall is small, it is not necessary to perform large-scale reinforcement by soft ground improvement etc. even in a soft ground by deeply inserting the support pile. For this reason, the space | interval of a pillar pile can be enlarged.
<3> Since the backfill amount of back soil is small, uneven settlement of the site hardly occurs.
<4> Because the rigidity is high and the rooting of the stake is deep, sliding does not occur even if unexpected earth pressure occurs.
<5> Regardless of the height of the neighboring land, it can be applied without significantly changing the specifications, so it has high versatility.

本発明に係る自立式擁壁の説明図。Explanatory drawing of the self-supporting retaining wall which concerns on this invention. 連結ブロック及び標準ブロックの説明図。Explanatory drawing of a connection block and a standard block. 配筋材の説明図。Explanatory drawing of a bar arrangement material. 連結構造体の説明図。Explanatory drawing of a connection structure. 実施例2の説明図。Explanatory drawing of Example 2. FIG.

以下、図面を参照しながら本発明の自立式擁壁及び連結ブロックについて詳細に説明する。
本明細書等における「上下」「前後」「縦」「横」「水平」「鉛直」などの各方位は、自立式擁壁の供用時における各方位を意味する。
Hereinafter, the freestanding retaining wall and connecting block of the present invention will be described in detail with reference to the drawings.
Each orientation such as “upper and lower”, “front and rear”, “longitudinal”, “horizontal”, “horizontal” and “vertical” in the present specification means each orientation at the time of service of the self-supporting retaining wall.

[自立式擁壁]
<1>全体の構成(図1)。
本発明の自立式擁壁1は、上下左右に接続した連結ブロック11及び標準ブロック12からなる壁面材10と、壁面材10内に縦横に配筋する配筋材20と、壁面材10の下方に埋設する支柱杭30と、壁面材10内に打設する充填材40と、を少なくとも備える。
壁面材10内には連続する打設空間Sを有し、打設空間S内には、配筋材20、支柱杭30、及び充填材40によって、一体構造の連結構造体Aが構成される。
[Self-supporting retaining wall]
<1> Overall configuration (FIG. 1).
The self-supporting retaining wall 1 of the present invention comprises a wall material 10 consisting of a connection block 11 and a standard block 12 connected vertically and horizontally, a reinforcement 20 arranged longitudinally and horizontally in the wall material 10, and a lower part of the wall material 10. And at least a filler material 40 to be placed in the wall material 10.
A continuous casting space S is provided in the wall surface material 10, and in the casting space S, a connection structure A having an integral structure is configured by the reinforcement members 20, the pillar piles 30, and the filling material 40. .

<2>壁面材。
壁面材10は、施工時における充填材40の型枠としての機能と、施工後における擁壁の壁面としての機能を兼備する、矩形面状の構成要素である。
壁面材10は、縦積みした複数の連結ブロック11の横方向に複数の標準ブロック12を接続してなる。
連結ブロック11と標準ブロック12はそれぞれ前面を揃えて配置し、連結ブロック11の背面は、支柱杭30と連結するための控え部として、標準ブロック12の背面より後方に突起する。
連結ブロック11と標準ブロック12はいずれも上下左右に開口した箱型形状であるため、壁面材10の内部には、連結ブロック11の内部と標準ブロック12の内部に連通した打設空間Sが構成される。
なお、本例では連結ブロック11の左右両側に標準ブロック12を接続しているがこれに限らず、連結ブロック11のいずれか一側にのみ標準ブロック12を接続してもよい。
<2> Wall material.
The wall surface material 10 is a rectangular planar component that combines the function of the filling material 40 as a mold during construction and the function as a wall of a retaining wall after construction.
The wall material 10 is formed by connecting a plurality of standard blocks 12 in the lateral direction of a plurality of vertically stacked connection blocks 11.
The connecting block 11 and the standard block 12 are arranged with their fronts aligned, and the back of the connecting block 11 projects rearward from the back of the standard block 12 as a holding portion for connecting with the column pile 30.
Since both the connection block 11 and the standard block 12 have a box shape opened vertically and horizontally, a casting space S communicating with the inside of the connection block 11 and the inside of the standard block 12 is configured in the wall surface material 10 Be done.
Although the standard block 12 is connected to the left and right sides of the connection block 11 in this example, the present invention is not limited to this. The standard block 12 may be connected to only one side of the connection block 11.

<2.1>連結ブロック(図2)。
連結ブロック11は、壁面材10を構成するブロックのうち、標準ブロック12と支柱杭30を連結するためのコンクリートブロックである。
本例では、連結ブロック11の高さ及び幅を標準ブロック12と同一とし、連結ブロック11の奥行を標準ブロック12より大きく設計する。但しこれに限られず、例えば連結ブロック11の幅を標準ブロック12より小さくしてもよい。
連結ブロック11は、壁面材10の前面を構成する壁面部11aと、壁面部11aの背面側に位置する控え部11eと、壁面部11aと控え部11eを連結する2つのウェブ部11bと、上下方向に連通する連結孔11fと、を少なくとも備える。
控え部11eは、背面側に位置する後壁と、後壁の両側から前面側に延出する2つの側壁を有し、控え部11eの2つの側壁は2つのウェブ部11bに接続する。
連結孔11fは、壁面部11a、控え部11e、及び2つのウェブ部11bの間に画設され、内部に支柱杭30を配置するための連結領域S1を有する。
本例では、連結孔11fの形状を概ね矩形状の形状とする。但しこれに限られず、連結ブロック11のサイズや支柱杭30の形状等に応じて適宜選択することができる。
<2.1> Connection block (FIG. 2).
The connection block 11 is a concrete block for connecting the standard block 12 and the pillar pile 30 among the blocks constituting the wall surface material 10.
In this example, the height and width of the connection block 11 are made equal to those of the standard block 12, and the depth of the connection block 11 is designed to be larger than that of the standard block 12. However, the present invention is not limited to this. For example, the width of the connection block 11 may be smaller than that of the standard block 12.
The connection block 11 includes a wall surface portion 11a constituting the front surface of the wall surface material 10, a projection portion 11e positioned on the back side of the wall surface portion 11a, two web portions 11b connecting the wall surface portion 11a and the projection portion 11e, And at least a connection hole 11f communicating in a direction.
The protrusion 11e has a back wall located on the back side and two side walls extending from both sides of the back wall to the front side, and the two side walls of the protrusion 11e are connected to the two webs 11b.
The connection hole 11f is provided between the wall surface portion 11a, the abutment portion 11e, and the two web portions 11b, and has a connection region S1 for disposing the support post 30 inside.
In the present example, the shape of the connection hole 11 f is a substantially rectangular shape. However, the present invention is not limited to this, and can be appropriately selected according to the size of the connection block 11, the shape of the support post 30, and the like.

<2.1.1>縦溝及び横溝。
本例では、連結ブロック11のウェブ部11bの上下左右にそれぞれ、縦方向に連続する縦溝11cと、横方向に連続する横溝11dを設ける。
但し、縦溝11c及び横溝11dは、各ウェブ部11bの上下左右全方向に設ける必要はなく、少なくとも連結ブロック11の両側面側と、上下面側に設ければよい。
本例では、縦溝11c及び横溝11dとしてU字溝を採用する。
<2.1.1> Vertical groove and horizontal groove.
In this example, vertical grooves 11c continuous in the vertical direction and horizontal grooves 11d continuous in the horizontal direction are provided on the upper, lower, left, and right sides of the web portion 11b of the connection block 11, respectively.
However, the vertical grooves 11c and the horizontal grooves 11d do not have to be provided in all the upper, lower, left, and right directions of each web portion 11b, and may be provided at least on both side surfaces of the connection block 11 and on the upper and lower surface sides.
In this example, U-shaped grooves are adopted as the vertical grooves 11c and the horizontal grooves 11d.

<2.2>標準ブロック(図2)。
標準ブロック12は、壁面材10の両翼部を構成するコンクリートブロックである。
標準ブロック12は、壁面材10の前面及び背面を構成する2つの壁面部12aと、2つの壁面部12aを連結する2つのウェブ部12bと、2つの壁面部12a及び2つのウェブ部12bの間に画設される縦孔12eを少なくとも備える。
但し、ウェブ部12bの数は2つに限られず、ウェブ部12bを3つ以上設ける場合には、縦孔12eの数も複数となる。
ウェブ部12bの上下左右には、それぞれ、縦溝12c及び横溝12dを設ける。縦溝12c及び横溝12dの構造は、上で説明した連結ブロック11における縦溝11c及び横溝11dと同様である。
なお、標準ブロック12は上記の他、一側面を面状に完全に塞いだ端部用の標準ブロック12や、前後の壁面部12aを連通する水抜き穴を設けた水抜き用の標準ブロック12などを用意してもよい。
<2.2> Standard block (FIG. 2).
The standard block 12 is a concrete block which constitutes both wings of the wall material 10.
The standard block 12 includes two wall portions 12a constituting the front and back surfaces of the wall material 10, two web portions 12b connecting the two wall portions 12a, and between the two wall portions 12a and two web portions 12b. At least a longitudinal hole 12e defined in FIG.
However, the number of web portions 12b is not limited to two, and when three or more web portions 12b are provided, the number of vertical holes 12e is also plural.
Vertical grooves 12c and horizontal grooves 12d are provided on the upper, lower, left, and right sides of the web portion 12b, respectively. The structures of the longitudinal grooves 12c and the lateral grooves 12d are the same as the longitudinal grooves 11c and the lateral grooves 11d in the connection block 11 described above.
In addition to the above, the standard block 12 is a standard block 12 for completely closing one side in a plane, and a standard block 12 for draining water provided with a water draining hole communicating the front and rear wall portions 12a. You may prepare etc.

<2.3>縦ループ領域及び横ループ領域。
壁面材10内において、左右に連結した連結ブロック11の縦溝11cと標準ブロック12の縦溝12cの間、及び標準ブロック12の縦孔12e内に、略円筒状の縦ループ領域S2が画設される。
また、上下に連結した連結ブロック11の横溝11dの間、及び上下に連結した標準ブロック12の横溝12dの間に、略円筒状の横ループ領域S3が画設される。
<2.3> Vertical loop area and horizontal loop area.
In the wall surface material 10, a substantially cylindrical longitudinal loop area S2 is provided between the longitudinal grooves 11c of the connection block 11 connected to the left and right and the longitudinal grooves 12c of the standard block 12 and in the longitudinal holes 12e of the standard block 12. Be done.
A substantially cylindrical lateral loop region S3 is defined between the lateral grooves 11d of the connecting block 11 connected vertically and between the lateral grooves 12d of the standard block 12 connected vertically.

<3>配筋材(図3)。
配筋材20は、壁面材10内に配筋する連結補強部材である。
本例では、配筋材20として異形鉄筋を採用する。
配筋材20は、垂直方向に配置する複数の縦筋21と、水平方向に配置する複数の横筋22と、支柱杭30との連結用の複数の接続筋23と、を備える。
縦筋21は、縦ループ領域S2内を縦方向に連通して配置する。
横筋22は、横ループ領域S3内を横方向に連通して配置する。
縦筋21と横筋22は、壁面材10内で交差して番線等で相互に緊結する。
接続筋23は横筋22と係合し、接続筋23と横筋22とで、支柱杭30のH鋼(芯材31)を包囲する。
本例では、接続筋23として平面視ハット型に曲折した鉄筋を採用し、横筋22を支柱杭30のH鋼の前面側に配置し、接続筋23の中央部分を支柱杭30のH鋼の背面側に配置し、接続筋23の両端部と横筋22を番線等で緊結する。
但し接続筋23の形状や連結方法はこれに限られず、例えば、接続筋23を横筋22と直接緊結せず、縦筋21のみと緊結してもよい。
要は、横筋22を支柱杭30の前面側に配置し、接続筋23を支柱杭30の背面側に配置することで、配筋材20全体として支柱杭30の包囲できればよい。
<3> Reinforcement material (FIG. 3).
The reinforcing member 20 is a connection reinforcing member arranged in the wall surface material 10.
In this example, a deformed rebar is used as the reinforcement 20.
The layout material 20 includes a plurality of vertical bars 21 arranged in the vertical direction, a plurality of horizontal bars 22 arranged in the horizontal direction, and a plurality of connecting bars 23 for connection with the support pile 30.
The longitudinal streaks 21 are disposed so as to communicate the inside of the longitudinal loop region S2 in the longitudinal direction.
The transverse bars 22 are disposed in communication with each other in the lateral loop region S3 in the lateral direction.
The longitudinal bars 21 and the transverse bars 22 cross each other in the wall material 10 and are mutually tightened by a number line or the like.
The connecting bars 23 engage with the transverse bars 22 and the connecting bars 23 and the transverse bars 22 surround the H steel (core 31) of the support pile 30.
In this example, a reinforcing bar bent into a hat shape in plan view is adopted as the connecting bar 23, the transverse bar 22 is disposed on the front side of the H steel of the column pile 30, and the central portion of the connecting bar 23 is the H steel of the column 30 It arrange | positions on the back side, and tightens the both ends of the connection muscle 23 and the cross muscle 22 by a number wire etc.
However, the shape and connecting method of the connecting muscle 23 are not limited to this, and for example, the connecting muscle 23 may be tightened only with the longitudinal muscle 21 without being directly tightened with the horizontal muscle 22.
The point is that by arranging the transverse bars 22 on the front side of the column pile 30 and arranging the connecting bars 23 on the back side of the column pile 30, it is only necessary to surround the column pile 30 as a whole of the reinforcing member 20.

<3.1>配筋材の径について。
本発明の自立式擁壁1は、壁面材10に付加される背面土圧を、支柱杭30の水平抵抗によって支持する構造である。
従って、配筋材20は、従来技術のL型擁壁とは逆に、支柱杭30と直交する横筋22が太径の主筋となり、これに交差する縦筋21が細径の配力筋となる。
About the diameter of <3.1> reinforcement material.
The self-supporting retaining wall 1 of the present invention is a structure for supporting the back earth pressure applied to the wall material 10 by the horizontal resistance of the support pile 30.
Therefore, in the arrangement material 20, contrary to the L-shaped retaining wall of the prior art, the horizontal bars 22 orthogonal to the support piles 30 become main bars of large diameter, and the vertical bars 21 intersecting this are the narrow distribution bars and Become.

<4>支柱杭。
支柱杭30は、地中から壁面材10を支持する部材である。
本例では、支柱杭30として地中に形成したソイルセメント改良体32と、改良体32の芯部に配置したH鋼の芯材31と、を備えたH鋼ソイルセメント杭を採用する。
H鋼ソイルセメント杭は軟弱地盤にも適用可能であり、芯材31を深く根入れすることで、滑動に対する高い抵抗性を発揮することができる。
但し、支柱杭30はH鋼ソイルセメント杭に限られず、例えば、鋼管ソイルセメント杭、鋼管杭、H鋼杭などであってもよい。
芯材31は地中に埋設する杭部31aと地盤から上方に突出する支柱部31bを有し、支柱部31bは連結ブロック11の連結孔11f内に延在する(図3)。
<4> Strut pile.
The pillar pile 30 is a member for supporting the wall material 10 from the ground.
In this example, an H steel soil cement pile including a soil cement improved body 32 formed in the ground as the pillar pile 30 and a core material 31 of H steel disposed at the core of the improved body 32 is employed.
The H steel soil cement pile is also applicable to soft ground, and by deeply inserting the core material 31, high resistance to sliding can be exhibited.
However, the pillar pile 30 is not limited to the H steel soil cement pile, and may be, for example, a steel pipe soil cement pile, a steel pipe pile, an H steel pile, or the like.
The core material 31 has a pile portion 31a embedded in the ground and a support portion 31b protruding upward from the ground, and the support portion 31b extends into the connection hole 11f of the connection block 11 (FIG. 3).

<5>充填材。
充填材40は、打設空間S内に打設する充填コンクリートである。
充填材40が打設空間S内で硬化することによって、配筋材20、支柱杭30のH鋼(芯材31)、及び充填材40が一体に連結した連結構造体Aが構成される。
<5> filler.
The filler 40 is filler concrete to be placed in the placement space S.
As the filler 40 hardens in the placement space S, a connection structure A is formed in which the reinforcing members 20, the H steel (core 31) of the pillar pile 30, and the filler 40 are integrally coupled.

<6>打設空間。
打設空間Sは、充填材40を打設するための壁面材10内の空間である。
打設空間Sは、連結孔11f内の連結領域S1と、連結ブロック11及び標準ブロック12間に形成される縦ループ領域S2及び横ループ領域S3と、が連通することで構成される。
打設空間Sが、壁面材10内の全面に連続して形成されていることによって、打設時に充填材40が密実かつ均一に充填され、高品質の連結構造体Aを構成することができる。
<6> placement space.
The placing space S is a space in the wall surface material 10 for placing the filler 40.
The placement space S is formed by communication between the connection region S1 in the connection hole 11f and the vertical loop region S2 and the horizontal loop region S3 formed between the connection block 11 and the standard block 12.
Since the casting space S is continuously formed on the entire surface in the wall surface material 10, the filler 40 is densely and uniformly filled at the time of casting, and a high quality connected structure A can be configured. it can.

<7>連結構造体(図4)。
連結構造体Aは、打設空間S内に構成される構造体である。
本発明の自立式擁壁1は、壁面材10内に連通する打設空間Sによって、配筋材20、支柱杭30の芯材31、及び充填材40からなる一体の連結構造体Aを構成する点に特徴を有する。
また、連結構造体Aのうち縦ループ領域S2及び横ループ領域S3に対応する円筒状の部分が、連結ブロック11のウェブ部11b及び標準ブロック12のウェブ部12bと係合されることによって、連結構造体Aと壁面材10が強固に結合する。
以上の構成により、H鋼と鉄筋コンクリートとブロック体による一体構造による高い剛性を発揮し、壁面材10に作用する背面土圧を土中の杭部31aに有効に伝達して支持することができる。
The <7> connection structure (FIG. 4).
The connection structure A is a structure configured in the placement space S.
The self-supporting retaining wall 1 of the present invention comprises an integral connecting structure A consisting of the rebar 20, the core 31 of the pillar pile 30, and the filler 40 by the placement space S communicating with the inside of the wall 10 It has a feature in
Further, the cylindrical portion corresponding to the longitudinal loop region S2 and the lateral loop region S3 in the connecting structure A is connected by being engaged with the web portion 11b of the connecting block 11 and the web portion 12b of the standard block 12 The structure A and the wall material 10 are firmly bonded.
According to the above configuration, high rigidity can be exhibited by the integrated structure of H steel, reinforced concrete, and block body, and the back earth pressure acting on the wall material 10 can be effectively transmitted and supported to the pile portion 31a in the ground.

[施工方法]
引き続き、本発明の自立式擁壁の施工方法について詳細に説明する。
<1>改良体の形成。
攪拌混合装置によって、セメント系固化材を地盤に注入しながら攪拌混合し、地中に柱状の改良体32を形成する。
同様にして、自立式擁壁1の連続方向に沿って所定間隔で所定数の改良体32を形成する。
[Construction method]
Then, the construction method of the self-supporting retaining wall of this invention is demonstrated in detail.
<1> Formation of improved body.
The cement-based solidifying material is stirred and mixed while being poured into the ground by a stirring and mixing device to form a columnar improved body 32 in the ground.
Similarly, a predetermined number of improvements 32 are formed at predetermined intervals along the continuous direction of the freestanding retaining wall 1.

<2>芯材の建て込み。
改良体32が未硬化の内に改良体32内に芯材31のH鋼を建て込む。この際、芯材31の支柱部31bを地盤上に突出させる。
芯材31の鉛直性と芯ずれがないかを確認する。
同様にして全ての改良体32に芯材31を建て込む。
<2> Build core material.
While the modified body 32 is unhardened, the H steel of the core material 31 is built in the modified body 32. At this time, the support portion 31 b of the core material 31 is made to project above the ground.
Check the verticality and misalignment of the core 31.
In the same manner, the core material 31 is built in all the modified bodies 32.

<3>捨てコンクリートの打設。
壁面材10設置場所の地盤に捨てコンクリートを打設し、表面を整形して支持面を形成する。
本発明の自立式擁壁1は、捨てコンクリートを壁面材10の直下にのみ打設すればよいため、作業負担が小さく施工効率が高い。
<3> Casting of abandoned concrete.
Discarding concrete in the ground of the wall material 10 installation place, shaping the surface, and forming a support surface.
The self-supporting retaining wall 1 of the present invention has a small work load and high construction efficiency, since it is sufficient to dispose discarded concrete only immediately below the wall material 10.

<4>連結ブロックの設置。
捨てコンクリートの支持面上に最下段の連結ブロック11を設置する。
この際、連結孔11f内に芯材31の支柱部31bを挿通する。
同様に全ての支柱杭30上に連結ブロック11を設置する。
設置後、連結孔11fの内壁と芯材31との間に所定のクリアランスが確保できていることを確認する。
<4> Installation of connecting block.
The lowermost connection block 11 is placed on the support surface of the discarded concrete.
At this time, the support portion 31 b of the core material 31 is inserted into the connection hole 11 f.
Similarly, the connection block 11 is installed on all the pillars 30.
After installation, it is confirmed that a predetermined clearance can be secured between the inner wall of the connection hole 11 f and the core material 31.

<5>標準ブロックの設置。
連結ブロック11から両側に標準ブロック12を配置してゆく。
最端部の標準ブロック12には、一側を面状に塞いだ端部ブロックを配置する。
最下段の全ての連結ブロック11と標準ブロック12が連結したら、水平確認及び鉛直確認を行う。
<5> Installation of standard block.
The standard blocks 12 are arranged on both sides from the connection block 11.
In the standard block 12 at the end, an end block whose surface is closed on one side is disposed.
When all the lowermost connected blocks 11 and the standard block 12 are connected, horizontal confirmation and vertical confirmation are performed.

<6>配筋材の配筋。
連結ブロック11及び標準ブロック12の縦ループ領域S2内に縦筋21を立設する。同時に、横ループ領域S3を構成する横溝11d、12dの上方に横筋22を配置する。
縦筋21と横筋22の各交点を番線などで緊結する。
本発明の自立式擁壁1は、主筋を横筋22、配力筋を縦筋21に配する構造であるため、施工時に太くて重い主筋を垂直方向に立てて扱う必要がない。
このため、施工効率がよく、作業の安全性が高い。
Reinforcement of <6> Reinforcement material.
The longitudinal bars 21 are erected in the longitudinal loop area S2 of the connection block 11 and the standard block 12. At the same time, the lateral streaks 22 are arranged above the lateral grooves 11d and 12d constituting the lateral loop area S3.
The respective intersections of the longitudinal streaks 21 and the transverse streaks 22 are tightened with a score line or the like.
The self-supporting retaining wall 1 of the present invention has a structure in which the main bars are arranged in the horizontal bars 22 and the distribution bars are arranged in the vertical bars 21. Therefore, it is not necessary to vertically handle heavy and heavy main bars at the time of construction.
Therefore, the construction efficiency is good and the safety of work is high.

<7>ブロックの積み上げと配筋。
<4>から<6>の作業を繰り返し、連結ブロック11及び標準ブロック12を所定の段数まで積み上げる。
<7> Stacking and arrangement of blocks.
The operations of <4> to <6> are repeated to stack the connected block 11 and the standard block 12 to a predetermined number of stages.

<8>充填材の打設。
打設空間S内に充填材40を打設する。
充填材40は全体が均一な高さになるよう、適切な打設速度で水平に打設する。
打設空間S内の充填材40が硬化して強度発現することによって、配筋材20、支柱杭30、及び充填材40からなる連結構造体Aが構成される。
同時に壁面材10と連結構造体Aが一体に連結して、自立式擁壁1が完成する。
本発明の自立式擁壁1は、連結ブロック11及び標準ブロック12のコンクリート面が充填材40より生ずるブリーディング水を適度に吸収するため、高品質な躯体を構築することができる。
<8> Placement of filler.
The filler 40 is placed in the placement space S.
The filler 40 is placed horizontally at an appropriate placement speed so that the entire height is uniform.
By hardening the filler 40 in the placing space S and developing its strength, a connection structure A composed of the reinforcing members 20, the strut piles 30, and the filler 40 is formed.
At the same time, the wall material 10 and the connecting structure A are integrally connected, and the freestanding retaining wall 1 is completed.
The self-supporting retaining wall 1 of the present invention can construct a high quality housing because the concrete surface of the connecting block 11 and the standard block 12 appropriately absorb bleeding water generated from the filler 40.

<9>その他。
以上の施工方法は一例にすぎず、実施にあたって適宜工程を変更してもよい。
例えば、<4>において全ての連結ブロック11を最上段まで積み上げた後に、標準ブロック12の配置と配筋を一段ずつ行ってもよい。
またこの他、水抜き穴の設置、透水層の形成、目地材の設置などを適宜おこなってよい。これらの工程は公知なのでここでは詳述しない。
<9> Others.
The above construction method is only an example, and the steps may be appropriately changed in implementation.
For example, after stacking all connected blocks 11 to the top in <4>, the arrangement and arrangement of the standard blocks 12 may be performed one by one.
In addition to this, installation of a drainage hole, formation of a permeable layer, installation of a joint material, etc. may be performed suitably. These steps are known and will not be described in detail here.

[連結ブロックを分割体とした例]
本発明の連結ブロック11は分割体であってもよい(図5)。
本例の連結ブロック11は、左右二分割の分割連結ブロックを組み合わせてなる。
自立式擁壁1の設計高が高い場合、連結ブロック11を支柱杭30の上方から降ろして設置する作業には困難が伴う。
これに対し、本例のように連結ブロック11を分割体とすることで、連結ブロック11で支柱杭30の芯材31を左右から挟み込んで配置できるので、連結ブロック11の高所吊り上げが不要となり施工効率が著しく向上する。
また、連結ブロック11が小型化するため、取扱いや搬送が容易になる。
[Example of connecting block as divided body]
The connection block 11 of the present invention may be a divided body (FIG. 5).
The connection block 11 of this example is formed by combining left and right divided divided connection blocks.
In the case where the design height of the freestanding retaining wall 1 is high, the work of installing the connection block 11 down from above the pillar pile 30 involves difficulties.
On the other hand, by using the connecting block 11 as a divided body as in the present example, the core material 31 of the support post 30 can be sandwiched by the connecting block 11 from the left and right, so that lifting of the connecting block 11 in height becomes unnecessary. Construction efficiency is significantly improved.
In addition, since the connecting block 11 is miniaturized, handling and transport become easy.

1 自立式擁壁
10 壁面材
11 連結ブロック
11a 壁面部
11b ウエブ部
11c 縦溝
11d 横溝
11e 控え部
11f 連結孔
12 標準ブロック
12a 壁面部
12b ウエブ部
12c 縦溝
12d 横溝
12e 縦孔
20 配筋材
21 縦筋
22 横筋
23 接続筋
30 支柱杭
31 芯材
31a 杭部
31b 支柱部
32 改良体
40 充填材
A 連結構造体
S 打設空間
S1 連結領域
S2 縦ループ領域
S3 横ループ領域
DESCRIPTION OF SYMBOLS 1 self-supporting retaining wall 10 wall surface material 11 connection block 11a wall surface part 11b web part 11c vertical groove 11d horizontal groove 11e horizontal part 11f connection hole 12 standard block 12a wall surface part 12b web part 12c vertical groove 12d horizontal groove 12e vertical hole 20 rebar 21 Vertical bars 22 Horizontal bars 23 Connecting bars 30 Struts 31 Core 31a Pile 31b Struts 32 Improved body 40 Filler A Connection structure S Placing space S1 Connection area S2 Longitudinal area S2 Lateral loop area

Claims (9)

縦積みした中空箱型の連結ブロックの横方向に中空箱型の標準ブロックを接続してなり、前記連結ブロックは上下に貫通する連結孔を有し、隣接する前記連結ブロック及び前記標準ブロックがそれぞれ上下左右に連通して内部に打設空間を構成する、壁面材と、
前記打設空間内に縦横に配筋する配筋材と、
前記壁面材の下方の地盤に埋設して支柱部が前記連結孔内に位置する支柱杭と、
前記打設空間内に配置する充填材と、を備え、
前記連結孔が前記打設空間と連通することで、前記壁面材の内部に、前記充填材、前記配筋材、及び前記支柱杭による、一体構造の連結構造体を構成したことを特徴とする、
自立式擁壁。
A hollow box type standard block is connected in the lateral direction of the vertically stacked hollow box type connection block, and the connection block has connection holes penetrating vertically, and the adjacent connection block and standard block are respectively connected Wall surface material that communicates with the top, bottom, left, and right to form a placement space inside,
Reinforcement members arranged longitudinally and transversely in the placement space;
A post pile which is embedded in the ground below the wall material and the post portion is located in the connection hole;
And a filler disposed in the placement space.
The connection hole is in communication with the placement space, so that a connection structure having an integral structure including the filler, the reinforcement, and the post is formed inside the wall material. ,
Self-supporting retaining wall.
前記連結ブロックが、壁面部と、前記壁面部の背面側に位置し、後壁と2つの側壁を有する控え部と、前記壁面部と前記控え部の側壁を連結する2つのウェブ部と、を備え、前記連結孔が、前記壁面部、前記控え部、及び前記2つのウェブ部の間に画設されることを特徴とする、請求項1に記載の自立式擁壁。   The connection block includes a wall surface portion, a back surface side portion of the wall surface portion, a backrest portion having a back wall and two side walls, and two web portions connecting the wall surface portion and side walls of the backout portion The self-supporting retaining wall according to claim 1, wherein the connection hole is defined between the wall portion, the abutment portion, and the two web portions. 前記連結ブロックのウェブ部の側面側には縦方向に連続する縦溝を有し、前記連結ブロックのウェブ部の上下面側には横方向に連続する横溝を有し、横方向に連結した前記連結ブロックと前記標準ブロックの間に縦ループ領域が画設され、縦方向に連結した前記連結ブロックの横溝間に横ループ領域が画設されることを特徴とする、請求項2に記載の自立式擁壁。   The side surface side of the web portion of the connection block has longitudinally continuous longitudinal grooves, and the upper and lower surface side of the web portion of the connection block has laterally continuous lateral grooves and the lateral connection The freestanding loop according to claim 2, wherein a longitudinal loop region is defined between the connection block and the standard block, and a lateral loop region is defined between the lateral grooves of the connection blocks connected in the longitudinal direction. Ceremony retaining wall. 前記連結ブロックが、左右分割体を組み合わせてなることを特徴とする、請求項1乃至3のいずれか一項に記載の自立式擁壁。   The self-supporting retaining wall according to any one of claims 1 to 3, wherein the connection block is formed by combining left and right divided bodies. 前記配筋材が、交差して相互に係合する複数の縦筋及び複数の横筋と、前記横筋に係合する複数の接続筋と、を備え、前記横筋と前記接続筋で前記支柱杭を包囲していることを特徴とする、請求項1乃至4のいずれか一項に記載の自立式擁壁。   The reinforcement material comprises: a plurality of longitudinal and lateral bars crossing each other and engaging with each other; and a plurality of connecting bars engaging with the horizontal bars; The self-supporting retaining wall according to any one of claims 1 to 4, characterized by surrounding. 前記配筋材が、交差して相互に係合する複数の縦筋及び複数の横筋を備え、前記縦筋が前記横筋より小径であることを特徴とする、請求項1乃至5のいずれか一項に記載の自立式擁壁。   The wire arrangement material according to any one of claims 1 to 5, characterized in that the reinforcement material comprises a plurality of longitudinal bars and a plurality of transverse bars that cross and engage with each other, and the longitudinal bars have a smaller diameter than the transverse bars. Self-supporting retaining wall described in the section. 前記支柱杭は、地盤面から地中にわたって形成した改良体と、下部を前記改良体内に同心状に配置した芯材と、を備え、前記芯材の支柱部が前記連結孔内に配置することを特徴とする、請求項1乃至6のいずれか一項に記載の自立式擁壁。   The column pile comprises an improved body formed from the ground surface to the ground, and a core material having a lower portion disposed concentrically in the body, and the column portion of the core material is disposed in the connection hole. The freestanding retaining wall according to any one of claims 1 to 6, characterized in that 中空箱型の標準ブロック及び中空箱型の連結ブロックを縦横に連結してなる、自立式擁壁の壁面材において、地盤に建て込んだ支柱杭と標準ブロックを連結する、連結ブロックであって、
壁面部と、
前記壁面部の背面側に位置し、後壁と2つの側壁を有する控え部と、
前記壁面部と前記控え部の側壁を連結する2つのウェブ部と、
前記壁面部、前記控え部、及び前記2つのウェブ部の間に画設されて上下方向に連通する連結孔であって、内部に支柱杭を配置可能な連結領域を有する連結孔と、を備え、
前記ウェブ部の側面側には縦方向に連続する縦溝を有し、
前記ウェブ部の上下面側には横方向に連続する横溝を有し、
壁面材を構成した状態において、横方向に連結した連結ブロックと標準ブロックの間に縦ループ領域が形成され、縦方向に連結した連結ブロックの横溝間に横ループ領域が形成され、前記連結領域、前記縦ループ領域、および前記横ループ領域が連通して、充填材打設用の打設空間を構成可能であることを特徴とする、
連結ブロック。
In a wall material of a freestanding retaining wall formed by connecting a hollow box-shaped standard block and a hollow box-shaped connecting block in a longitudinal and transverse manner, the connecting block connects a pillar pile built on the ground and the standard block,
The wall section,
A butt portion located on the back side of the wall portion and having a back wall and two side walls;
Two webs connecting the wall surface and the side wall of the projection;
A connection hole defined between the wall surface portion, the projection portion, and the two web portions and communicating in the vertical direction, the connection hole having a connection area in which a post can be arranged. ,
The side surface side of the web portion has a longitudinally continuous longitudinal groove,
On the upper and lower surface sides of the web portion, there are laterally continuous lateral grooves,
In the state where the wall material is configured, a longitudinal loop area is formed between the connection block and the standard block connected in the lateral direction, and a horizontal loop area is formed between the lateral grooves of the connection block connected in the longitudinal direction; The longitudinal loop area and the lateral loop area communicate with each other to constitute a placement space for placing a filling material.
Concatenated block.
左右分割体を組み合わせてなることを特徴とする、請求項8に記載の連結ブロック。   The connection block according to claim 8, wherein left and right split bodies are combined.
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