JP6385554B1 - Self-supporting retaining wall - Google Patents

Self-supporting retaining wall Download PDF

Info

Publication number
JP6385554B1
JP6385554B1 JP2017247867A JP2017247867A JP6385554B1 JP 6385554 B1 JP6385554 B1 JP 6385554B1 JP 2017247867 A JP2017247867 A JP 2017247867A JP 2017247867 A JP2017247867 A JP 2017247867A JP 6385554 B1 JP6385554 B1 JP 6385554B1
Authority
JP
Japan
Prior art keywords
wall surface
retaining wall
restraint
self
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2017247867A
Other languages
Japanese (ja)
Other versions
JP2019112849A (en
Inventor
佐藤 克彦
克彦 佐藤
佳勝 渡辺
佳勝 渡辺
Original Assignee
株式会社トラバース
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社トラバース filed Critical 株式会社トラバース
Priority to JP2017247867A priority Critical patent/JP6385554B1/en
Application granted granted Critical
Publication of JP6385554B1 publication Critical patent/JP6385554B1/en
Publication of JP2019112849A publication Critical patent/JP2019112849A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Retaining Walls (AREA)

Abstract

【課題】CFT構造の高耐力支柱によって控え部を小型化できるスリムな構造の自立式擁壁を提供する。
【解決手段】自立式擁壁1は、矩形面状の壁面材11と、壁面材11の背面に高さ方向に沿って連結した中空角形の拘束管12と、を有する擁壁パネル10と、擁壁パネル10の下方の地盤に埋設し、上部が拘束管12の管内に突出する杭体20と、拘束管12内に配置する充填材30と、を備え、充填材30が拘束管12内に一体に拘束されることによって高耐力柱構造を構成したことを特徴とする。
【選択図】図2
Provided is a self-supporting retaining wall having a slim structure in which a retaining portion can be reduced in size by a high strength strut having a CFT structure.
A self-supporting retaining wall (1) has a rectangular wall surface member (11) and a retaining wall panel (10) having a hollow rectangular restraint pipe (12) connected to the back surface of the wall member (11) along the height direction; The pile body 20 is embedded in the ground below the retaining wall panel 10 and the upper part protrudes into the pipe of the restraint pipe 12, and the filler 30 is arranged in the restraint pipe 12. It is characterized in that a high-strength column structure is configured by being restrained integrally.
[Selection] Figure 2

Description

本発明は自立式擁壁に関し、特にCFT構造の高耐力支柱によって控え部を小型化できるスリムな構造の自立式擁壁に関する。   The present invention relates to a self-supporting retaining wall, and more particularly, to a self-supporting retaining wall having a slim structure in which a retaining portion can be miniaturized by a high strength strut having a CFT structure.

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。擁壁にかかる従来技術として、コンクリート製の擁壁パネルと杭体の一体構造からなる自立式擁壁が広く供用されている。
特許文献1には、地盤にソイルセメント改良体を形成してH鋼や鋼管等の芯材を建て込み、擁壁パネルを芯材に挿通させながら積み上げて壁面を構成する自立式擁壁が開示されている。また、特許文献2には、擁壁パネルを鋼管杭で支持した自立式擁壁が開示されている。
これら従来技術の自立式擁壁は、擁壁パネルがコンクリートの一体構造からなるため、厚肉の控え部がパネルの背面から大きく突出する。
In residential land creation work on sloping ground, a retaining wall is constructed at the end of the valley side to prevent the collapse of the stepped part formed by cutting or embankment. As a conventional technique related to a retaining wall, a self-supporting retaining wall composed of an integrated structure of a concrete retaining wall panel and a pile is widely used.
Patent Document 1 discloses a self-supporting retaining wall in which a soil cement improved body is formed on the ground, a core material such as H steel or steel pipe is built, and the retaining wall panel is stacked while being inserted through the core material to constitute a wall surface. Has been. Patent Document 2 discloses a self-supporting retaining wall in which a retaining wall panel is supported by a steel pipe pile.
In these conventional self-supporting retaining walls, the retaining wall panel is made of an integral structure of concrete, so that the thick retaining portion protrudes greatly from the back surface of the panel.

特開2001−311169号公報JP 2001-31169 A 特開平10−152848号公報JP-A-10-152848

従来技術には以下のような問題点がある。
<1>擁壁パネルの控え部が大きく厚肉なので重量が重く、取り回しが困難である。このため、施工効率が悪い。
<2>擁壁パネルのサイズが大きいため、材料コストが高い。
<3>擁壁パネルの控え部が大きいため、荷姿が悪く、積み重ねることができない。このため、保管に広い空間が必要となる。
<4>積み重ねることができないので、擁壁パネルを小ロットずつしか搬送できない。このため、搬送コストが高い。
<5>擁壁パネルの控え部が大きく背面に突起するため、背面側の構造物や配管設備などに干渉しやすい。
<6>控え部が突起するため擁壁パネルを切断しにくい。このため、形状変更が困難で設計の自由度が低い。
<7>施工時に擁壁パネルを支柱上部の高い位置まで吊り上げる必要がある。このため、作業が難しく施工効率が悪い。
<8>擁壁パネルの重量が重く、吊り上げ高が高いため、大型の重機が必要となる。このため、施工コストが嵩む上、敷地の狭小な住宅地での施工が難しい。
The prior art has the following problems.
<1> Since the retaining portion of the retaining wall panel is large and thick, it is heavy and difficult to handle. For this reason, construction efficiency is bad.
<2> Since the size of the retaining wall panel is large, the material cost is high.
<3> Because the retaining part of the retaining wall panel is large, the packing is bad and cannot be stacked. For this reason, a large space is required for storage.
<4> Since they cannot be stacked, the retaining wall panels can be transported only in small lots. For this reason, the conveyance cost is high.
<5> Since the retaining portion of the retaining wall panel is large and protrudes on the back surface, it easily interferes with structures and piping facilities on the back side.
<6> Since the retaining portion protrudes, it is difficult to cut the retaining wall panel. For this reason, it is difficult to change the shape and the degree of design freedom is low.
<7> It is necessary to lift the retaining wall panel to a high position above the support column during construction. For this reason, work is difficult and construction efficiency is bad.
<8> Since the retaining wall panel is heavy and the lifting height is high, a large heavy machine is required. For this reason, construction costs increase and construction in a small residential area of the site is difficult.

本発明の目的は、以上のような問題点を解決できる、自立式擁壁を提供することにある。   The objective of this invention is providing the self-supporting retaining wall which can solve the above problems.

本発明の自立式擁壁は、壁面材と中空角形の拘束管を有する擁壁パネルと、上部が拘束管の管内に突出する杭体と、拘束管内に配置する充填材と、を備え、充填材が拘束管内に一体に拘束されることによって高耐力柱構造を構成したことを特徴とする。
この構成によれば、CFT構造による強靱性、高強度、および高耐力を発揮することができる。
A self-supporting retaining wall of the present invention comprises a retaining wall panel having a wall material and a hollow rectangular restraint tube, a pile body whose upper portion projects into the tube of the restraint tube, and a filler disposed in the restraint tube, A high-strength column structure is configured by integrally restraining the material in the restraint tube.
According to this configuration, it is possible to exhibit toughness, high strength, and high yield strength due to the CFT structure.

本発明の自立式擁壁は、杭体の頭部と、充填材と、拘束管とによって、杭頭固定部を構成してもよい。
この構成によれば、短尺の芯材でもって壁面材に作用する背面土圧を杭体の地中部分に有効に伝達することができる。
The self-supporting retaining wall of the present invention may constitute a pile head fixing portion by the head of the pile body, the filler, and the restraint pipe.
According to this structure, the back surface earth pressure which acts on a wall surface material with a short core material can be effectively transmitted to the underground part of a pile body.

本発明の自立式擁壁は、壁面材が壁面本体の背面から一部突出した複数の連結片を有し、連結片を介して壁面材と拘束管を連結してもよい。
この構成によれば、構造でもって壁面材と拘束管を一体に連結することができる。
The self-supporting retaining wall of the present invention may have a plurality of connecting pieces in which the wall material partially protrudes from the back surface of the wall surface body, and the wall material and the restraint pipe may be connected via the connecting pieces.
According to this structure, a wall surface material and a restraint pipe | tube can be integrally connected with a structure.

本発明の自立式擁壁は、連結片が、支持部と連結部を備えた断面略T字形状を呈していてもよい。
この構成によれば、連結片の引き抜きに対する抵抗を強化することができる。
In the self-supporting retaining wall of the present invention, the connecting piece may have a substantially T-shaped cross section including a support portion and a connecting portion.
According to this structure, the resistance with respect to extraction of a connection piece can be strengthened.

本発明の自立式擁壁は、壁面本体が有筋のコンクリートパネルであって、連結片が鉄筋と係合していてもよい。
この構成によれば、壁面本体と連結片の一体性をさらに強化することができる。
In the self-supporting retaining wall of the present invention, the wall surface body may be a reinforced concrete panel, and the connecting piece may be engaged with the reinforcing bar.
According to this configuration, the integrity of the wall surface main body and the connecting piece can be further strengthened.

本発明の自立式擁壁は、拘束管を壁面材の連結孔へボルト連結してもよい。
この構成によれば、壁面材が完全に平坦になるため、製造コストが安価になり、搬送や運搬がより容易になる。
In the self-supporting retaining wall of the present invention, the restraint pipe may be bolt-connected to the connection hole of the wall surface material.
According to this configuration, since the wall surface material becomes completely flat, the manufacturing cost is reduced, and conveyance and transportation are easier.

本発明の自立式擁壁は、拘束管が両側方に延出する支持翼を有し、拘束管を支持翼を介してボルト連結してもよい。
この構成によれば、簡易な構造でもって、壁面材を安定して連結支持することができる。
The self-supporting retaining wall of the present invention may have support wings in which the restraint pipe extends on both sides, and the restraint pipe may be bolted via the support wings.
According to this configuration, the wall surface material can be stably connected and supported with a simple structure.

本発明の自立式擁壁は、連結孔内に連結補強材を埋設してもよい。
この構成によれば、連結孔周辺のコーン状破壊を防止することができる。
The self-supporting retaining wall of the present invention may embed a connection reinforcing material in the connection hole.
According to this configuration, it is possible to prevent cone-like destruction around the connection hole.

本発明の自立式擁壁は、壁面材が分割壁面材を高さ方向に連続してなってもよい。
この構成によれば、壁面材を小分割化することで搬送や保管がより容易になる。
In the self-supporting retaining wall of the present invention, the wall surface material may be formed by continuing the divided wall surface material in the height direction.
According to this structure, conveyance and a storage become easier by subdividing a wall surface material.

本発明の自立式擁壁は、杭体が、改良体と改良体内に同心状に配置した芯材とを備え、芯材の上部が拘束管内に突出していてもよい。
この構成によれば、芯材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。
In the self-supporting retaining wall of the present invention, the pile body may include an improved body and a core material arranged concentrically in the improved body, and an upper portion of the core material may protrude into the restraint pipe.
According to this structure, high resistance with respect to sliding can be exhibited by deeply incorporating the core material.

本発明の自立式擁壁は、角形鋼管と充填コンクリートの組み合わせによるCFT構造により、強靱性、高強度、高耐力の高耐力柱構造を実現することができる。このため、次の効果のうち少なくとも一つを備える。
<1>厚肉コンクリートの控え部に替わって、壁面材を小断面の角形鋼管で支持可能であるため、擁壁パネルを大幅に軽量化できる。このため、取り回しが容易で施工効率が高い。
<2>厚肉コンクリートの控え部を安価な角形鋼管に置き換えることができるため、材料コストが非常に安い。
<3>角形鋼管を現場で取り付けることができるため、保管時の荷姿がよく、間に角材などを介挿することで平積みすることができる(図4)。このため、小スペースで保管することができる。
<4>擁壁パネルを平積みして搬送できるため、一度に多数を搬送することができる。このため、搬送コストが安い。
<5>角形鋼管の背面への突出長が小さいため、背面側の構造物や配管設備などに干渉しにくく、有効敷地面積を増大させることができる。
<6>壁面材が控え部のない平板構造であるため、設計に応じて容易に切断することができる。また、角形鋼管の付設位置を適宜変更できる。このため、設計の自由度が高い。
<7>擁壁パネルと杭体とを杭頭固定とすることで、擁壁パネルの吊り上げ高を大幅に低くすることができる。このため、作業が容易で施工効率が高い。
<8>擁壁パネルが軽量で、吊り上げ高が低いため、小型の重機で施工できる。このため、施工コストが安く、狭隘な住宅地でも容易に施工できる。
The self-supporting retaining wall of the present invention can realize a high strength column structure having toughness, high strength, and high yield strength by a CFT structure using a combination of a square steel pipe and filled concrete. For this reason, at least one of the following effects is provided.
<1> Instead of a thick-walled concrete retaining part, the wall surface material can be supported by a square steel pipe having a small cross section, so that the retaining wall panel can be significantly reduced in weight. For this reason, handling is easy and construction efficiency is high.
<2> Since the retaining portion of the thick-walled concrete can be replaced with an inexpensive square steel pipe, the material cost is very low.
<3> Since square steel pipes can be installed on site, the packing state at the time of storage is good and can be stacked by inserting squares or the like (FIG. 4). For this reason, it can be stored in a small space.
<4> Since the retaining wall panels can be stacked and transported, a large number can be transported at once. For this reason, the conveyance cost is low.
<5> Since the projecting length of the square steel pipe to the back surface is small, it is difficult to interfere with structures and piping facilities on the back side, and the effective site area can be increased.
<6> Since the wall surface material has a flat plate structure without a reserve portion, it can be easily cut according to the design. Moreover, the attachment position of a square steel pipe can be changed suitably. For this reason, the freedom degree of design is high.
By making the <7> retaining wall panel and the pile body fixed to the pile head, the lifting height of the retaining wall panel can be significantly reduced. For this reason, work is easy and construction efficiency is high.
<8> Because the retaining wall panel is lightweight and the lifting height is low, it can be constructed with small heavy machinery. For this reason, construction cost is low, and it can be easily constructed even in a narrow residential area.

本発明の自立式擁壁の説明図。Explanatory drawing of the self-supporting retaining wall of this invention. 本発明の自立式擁壁の説明図。Explanatory drawing of the self-supporting retaining wall of this invention. 擁壁パネルの説明図。Explanatory drawing of a retaining wall panel. 壁面材の説明図。Explanatory drawing of wall surface material. 連結片の説明図。Explanatory drawing of a connection piece. 実施例2の説明図。Explanatory drawing of Example 2. FIG. 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について詳細に説明する。   Hereinafter, the self-supporting retaining wall of the present invention will be described in detail with reference to the drawings.

[自立式擁壁]
<1>全体の構成(図1、2)。
本発明の自立式擁壁1は、CFT(Concrete Filled Steel Tube:コンクリート充填鋼管)構造による高耐力支柱によって背面の土圧を有効に支持可能な構造物である。
自立式擁壁1は、壁面材11と拘束管12を有する擁壁パネル10と、擁壁パネル10を支持する杭体20と、拘束管12内に充填する充填材30と、を少なくとも備える。杭体20の上部は拘束管12内に配置し、充填材30によって、擁壁パネル10と杭体20とを一体に連結する。
本例では、擁壁パネル10と杭体20を杭頭固定部Jによって連結する杭頭固定の構造を採用する。
複数の自立式擁壁1を擁壁パネル10の面方向に連続することで連続壁として背面の土を支持する。
[Self-standing retaining wall]
<1> Overall configuration (FIGS. 1 and 2).
The self-supporting retaining wall 1 of the present invention is a structure that can effectively support the earth pressure on the back surface by a high strength support column having a CFT (Concrete Filled Steel Tube) structure.
The self-supporting retaining wall 1 includes at least a retaining wall panel 10 having a wall surface material 11 and a restraint tube 12, a pile body 20 that supports the retaining wall panel 10, and a filler 30 that fills the restraint tube 12. The upper part of the pile body 20 is disposed in the restraint pipe 12, and the retaining wall panel 10 and the pile body 20 are integrally connected by the filler 30.
In this example, the structure of the pile head fixation which connects the retaining wall panel 10 and the pile body 20 by the pile head fixing | fixed part J is employ | adopted.
By supporting a plurality of self-supporting retaining walls 1 in the surface direction of the retaining wall panel 10, the back soil is supported as a continuous wall.

<2>擁壁パネル(図3)。
擁壁パネル10は、自立式擁壁1の壁面を構成するパネル部材である。
擁壁パネル10は、壁面材11と、壁面材11の背面中央に高さ方向に沿って連結した拘束管12と、を少なくとも備える。なお、拘束管12の付設位置は背面中央に限らず、設計に応じて背面の片側に偏芯して付設してもよい。
本例では、壁面材11が複数の連結片11bを有し、壁面材11と拘束管12を、拘束管12の両側面に添接した複数の連結片11bを介して連結する。
<2> Retaining wall panel (FIG. 3).
The retaining wall panel 10 is a panel member that constitutes the wall surface of the self-supporting retaining wall 1.
The retaining wall panel 10 includes at least a wall surface material 11 and a restraint pipe 12 connected to the center of the back surface of the wall surface material 11 along the height direction. The attachment position of the restraint tube 12 is not limited to the center of the back surface, and may be attached eccentrically to one side of the back surface depending on the design.
In this example, the wall surface material 11 has a plurality of connection pieces 11 b, and the wall surface material 11 and the restraint tube 12 are connected via a plurality of connection pieces 11 b that are in contact with both side surfaces of the restraint tube 12.

<2.1>壁面材。
壁面材11は、擁壁パネル10における面状の構成要素である。
本例では、壁面材11として、矩形面状の壁面本体11aと、壁面本体11aの背面から一部が突出した複数の連結片11bと、を備える。
壁面本体11aとして、プレキャストの鉄筋コンクリートを採用する。壁面本体11aの表面には凹凸や溝などの意匠加工(化粧)を施してもよい。
本発明の自立式擁壁1は、擁壁パネル10が壁面材11と拘束管12の連結構造であるため、軽量で施工性に優れる上、壁面材11の間に角材などを挟むことで、平積みして搬送・保管することができる(図4)。
<2.1> Wall material.
The wall surface material 11 is a planar component in the retaining wall panel 10.
In this example, the wall surface member 11 includes a rectangular wall surface main body 11a and a plurality of connecting pieces 11b partially protruding from the back surface of the wall surface main body 11a.
Precast reinforced concrete is adopted as the wall surface body 11a. The surface of the wall surface main body 11a may be subjected to design processing (makeup) such as unevenness and grooves.
In the self-supporting retaining wall 1 of the present invention, since the retaining wall panel 10 is a connection structure of the wall surface material 11 and the restraint pipe 12, it is lightweight and excellent in workability, and by sandwiching a square material between the wall surface materials 11, It can be transported and stored flat (Fig. 4).

<2.1.1>連結片(図5)。
連結片11bは、壁面材11を拘束管12に連結するための構成要素である。
連結片11bは、一部を壁面本体11a内に埋設し、他部を壁面本体11aの背面から突出させる。これによって、連結片11bが壁面本体11a内に一体に固定されるため、供用時、土圧によって連結片11bが引き抜けるおそれがない。
本例では、連結片11bとして、面状の支持部11cと、支持部11cの一面の中央から突起する連結部11dと、を備えた断面略T字形状の鋼材を採用する。
連結部11dの側面には、高さ方向の所定の間隔でボルト孔を穿設する。
支持部11cを壁面本体11aの背面と平行に配置し、連結部11dを壁面本体11aの背面から突出させる。
複数の連結片11bを所定間隔で上下方向に埋設して、拘束管12の側面を二面から挟み込むことが可能なように連結部11dを二列に配置する。
この際、連結片11bの支持部11cを壁面本体11aの鉄筋11gに係合することで、壁面本体11aと連結片11bの一体性を強化し、引き抜きに対する抵抗をさらに強めることができる。
ここで「係合」とは支持部11cを鉄筋11gに直接接触して掛ける他、鉄筋11gより前面側に配置し、過大な土圧で壁面本体11aのコンクリートが破壊された時に支持部11cが鉄筋11gに係止される位置に配置することを含む。
なお、連結片11bの構造は上記に限定されず、例えば、断面略L字形状や断面略Z字形状、断面略コ字形状等を採用してもよい。
<2.1.1> Connecting piece (FIG. 5).
The connecting piece 11 b is a component for connecting the wall surface material 11 to the restraint tube 12.
A part of the connecting piece 11b is embedded in the wall surface main body 11a, and the other part is projected from the back surface of the wall surface main body 11a. Thereby, since the connecting piece 11b is integrally fixed in the wall surface main body 11a, there is no possibility that the connecting piece 11b is pulled out by earth pressure during use.
In this example, a steel material having a substantially T-shaped cross section including a planar support portion 11c and a connection portion 11d protruding from the center of one surface of the support portion 11c is employed as the connection piece 11b.
Bolt holes are drilled at a predetermined interval in the height direction on the side surface of the connecting portion 11d.
The support part 11c is arrange | positioned in parallel with the back surface of the wall surface main body 11a, and the connection part 11d is made to protrude from the back surface of the wall surface main body 11a.
The connecting portions 11d are arranged in two rows so that the plurality of connecting pieces 11b are embedded in the vertical direction at predetermined intervals so that the side surfaces of the restraint tube 12 can be sandwiched from the two surfaces.
At this time, by engaging the support portion 11c of the connecting piece 11b with the reinforcing bar 11g of the wall surface main body 11a, the integrity of the wall surface main body 11a and the connecting piece 11b can be strengthened, and the resistance to pulling can be further increased.
Here, “engagement” means that the support part 11c is placed in front of the reinforcing bar 11g in direct contact with the reinforcing bar 11g, and the support part 11c is placed when the concrete of the wall surface body 11a is destroyed by excessive earth pressure. It arrange | positions in the position latched by the reinforcing bar 11g.
In addition, the structure of the connection piece 11b is not limited to the above, For example, you may employ | adopt cross-sectional substantially L shape, cross-sectional substantially Z shape, cross-sectional substantially U-shape, etc.

<2.2>拘束管。
拘束管12は、内部に充填された充填材30を拘束することによって、CFT構造による高耐力支柱を構成する構成要素である。
拘束管12は、長尺の角形鋼管からなる。
拘束管12の幅、厚さ、及び長さは、自立式擁壁1の設計や要求性能に応じて適宜設定する。本例では拘束管12の長さを壁面材11の高さより短く設定する。
本例では、拘束管12の側面の、連結片11bのボルト孔に対応する位置に、複数のボルト孔を穿設する。
拘束管12は、側面の一面が壁面材11の背面に接し、該側面に隣接する二面が二列の支持部11cの間に挟まれる。
拘束管12の下端は、壁面材11の底面に揃える。
<2.2> Restraint tube.
The constraining tube 12 is a component that constitutes a high strength strut having a CFT structure by constraining the filler 30 filled therein.
The restraint tube 12 is made of a long square steel tube.
The width, thickness, and length of the restraint tube 12 are appropriately set according to the design and required performance of the self-supporting retaining wall 1. In this example, the length of the restraint pipe 12 is set shorter than the height of the wall surface material 11.
In this example, a plurality of bolt holes are drilled at positions corresponding to the bolt holes of the connecting piece 11b on the side surface of the restraint tube 12.
The constraining tube 12 has one side surface in contact with the back surface of the wall surface material 11, and two surfaces adjacent to the side surface are sandwiched between two rows of support portions 11c.
The lower end of the restraint tube 12 is aligned with the bottom surface of the wall surface material 11.

<2.2.1>CFT構造。
本発明の自立式擁壁1は、拘束管12内に充填された充填材30が硬化することによって、拘束管12と充填材30によるCFT構造の高耐力支柱を構成する点に特徴の一つがある。
CFT構造は、コンクリートが鋼管の局部座屈を防ぐと同時に、鋼管がコンクリートの破壊を防ぐ相互拘束効果(コンファインド効果)によって、強靱性、高強度、および高耐力を発揮可能な構造である。
充填材30の均質・密実かつ隙間のない充填、適切な強度発現、及び拘束管12と充填材30の一体化を保証することで、設計上もCFT構造の相互拘束効果を考慮することができる。このため、従来の自立式擁壁と比較して、同一性能において控え部のサイズを大幅に縮小することができる。
<2.2.1> CFT structure.
One of the features of the self-supporting retaining wall 1 of the present invention is that a high strength support column having a CFT structure is formed by the restraint tube 12 and the filler 30 by hardening the filler 30 filled in the restraint tube 12. is there.
The CFT structure is a structure that can exhibit toughness, high strength, and high yield strength by a mutual restraining effect (confined effect) in which the concrete pipe prevents local buckling of the steel pipe and at the same time the steel pipe prevents destruction of the concrete.
It is possible to consider the mutual restraint effect of the CFT structure also in the design by assuring that the filling material 30 is homogeneous, solid, and without gaps, appropriate strength development, and integration of the restraint pipe 12 and the filling material 30. it can. For this reason, compared with the conventional self-supporting retaining wall, the size of the holding part can be greatly reduced in the same performance.

<3>杭体。
杭体20は、地中から擁壁パネル10を支持する部材である。
本例では、杭体20として地中に形成したソイルセメント改良体22と、改良体22の芯部に配置したH鋼の芯材21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21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、杭体20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21の頭部は地盤から上方に突出させ、拘束管12の下端の内部に配置する。
<3> Pile body.
The pile body 20 is a member that supports the retaining wall panel 10 from the ground.
In this example, the H steel soil cement pile provided with the soil cement improved body 22 formed in the ground as the pile body 20 and the core material 21 of the H steel disposed at the core portion of the improved body 22 is employed.
The H steel soil cement pile can also be applied to soft ground, and by deeply incorporating the core material 21, high resistance to sliding can be exhibited.
However, the pile body 20 is not limited to the H steel soil cement pile, and may be a steel pipe soil cement pile, a steel pipe pile, an H steel pile, or the like.
The head of the core material 21 protrudes upward from the ground and is disposed inside the lower end of the restraint tube 12.

<4>充填材。
充填材30は、拘束管12内に充填することによって擁壁パネル10と杭体20を一体に連結する部材である。
本例では、充填材30として高強度・高流動コンクリートを採用する。
CFT構造の性能は充填材30の品質に大きく左右されるため、充填材30調合及び品眞つ管理には特に留意を要する。
<4> Filler.
The filler 30 is a member that integrally connects the retaining wall panel 10 and the pile body 20 by filling the restraint pipe 12.
In this example, high strength and high fluidity concrete is employed as the filler 30.
Since the performance of the CFT structure greatly depends on the quality of the filler 30, special attention must be paid to the preparation and management of the filler 30.

<5>杭頭固定部(図2)。
本例の自立式擁壁1は、芯材21の頭部と拘束管12の内壁の間に充填した充填材30が硬化することによって、杭頭固定部Jを構成する点に特徴の一つがある。
杭頭固定部Jは、H鋼の芯材21の頭部をCFT構造の拘束管12内に強固に拘束することで、擁壁パネル10を杭体20に杭頭固定し、壁面材11に作用する背面土圧を、杭頭固定部Jにおける拘束管12、充填材30、及び芯材21の一体連結を介して、杭体20の地中部分に有効に伝達することができる。
このように、芯材21の地上への突出長を大幅に短縮できるので、芯材21の長さを半減でき、材料コストを大幅に低減することができる。
<5> Pile head fixing part (FIG. 2).
One of the features of the self-supporting retaining wall 1 of this example is that the pile head fixing portion J is configured by the filler 30 filled between the head of the core 21 and the inner wall of the restraint tube 12 being cured. is there.
The pile head fixing part J fixes the retaining wall panel 10 to the pile body 20 by firmly restraining the head of the core material 21 of H steel in the restraint pipe 12 of the CFT structure, The acting back earth pressure can be effectively transmitted to the underground portion of the pile body 20 through the integral connection of the restraint pipe 12, the filler 30, and the core material 21 in the pile head fixing portion J.
Thus, since the protrusion length of the core material 21 to the ground can be significantly shortened, the length of the core material 21 can be halved, and the material cost can be greatly reduced.

[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>擁壁パネルの組立。
壁面材11背面から突出する2列の連結片11bの間に拘束管12を配置し、両者のボルト孔が一致するように位置合わせをする。
連結片11bと拘束管12に連結ボルト13を連通し、両者をボルト結合する。
[Construction method]
Next, the construction method of the self-supporting retaining wall of the present invention will be described in detail.
<1> Assembly of retaining wall panels.
The restraint pipe 12 is disposed between the two rows of connecting pieces 11b protruding from the back surface of the wall surface material 11, and the positions are adjusted so that the bolt holes of the two coincide.
The connecting bolt 13 is communicated with the connecting piece 11b and the restraining tube 12, and both are bolted together.

<2>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22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22を形成する。
<2> Formation of an improved body.
The cement-type solidified material is stirred and mixed by the stirring and mixing device while being poured into the ground, and the columnar improvement body 22 is formed in the ground.
Similarly, a predetermined number of improvement bodies 22 are formed at predetermined intervals along the continuous direction of the self-supporting retaining wall 1.

<3>芯材の建て込み。
改良体22が未硬化の内に改良体22内に芯材21のH鋼を建て込む。この際、芯材21の頭部を地盤上に突出させる。突出長は設計に応じて適宜設定するが、本例では芯材21の頭部を200mm程度突出させる。
芯材21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22に芯材21を建て込む。
<3> Built-in core material.
The H steel of the core material 21 is built in the improved body 22 while the improved body 22 is unhardened. At this time, the head of the core material 21 is projected on the ground. Although the protrusion length is appropriately set according to the design, in this example, the head of the core member 21 is protruded by about 200 mm.
The core material 21 is checked for verticality and misalignment.
Similarly, the core material 21 is built in all the improved bodies 22.

<4>擁壁パネルの設置。
擁壁パネル10を地盤上に吊り下ろす。
この際、拘束管12内に芯材21を挿通する。
本例では、擁壁パネル10を杭頭固定部Jによる杭頭固定とするため、擁壁パネル10を高く吊り上げる必要がない。このため、施工効率が非常に高い。
設置後、壁面材11の水平確認及び鉛直確認と、拘束管12の内壁と芯材21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 retaining wall panels.
The retaining wall panel 10 is suspended on the ground.
At this time, the core material 21 is inserted into the constraining tube 12.
In this example, since the retaining wall panel 10 is pile head fixed by the pile head fixing part J, it is not necessary to lift the retaining wall panel 10 high. For this reason, construction efficiency is very high.
After the installation, the horizontal confirmation and vertical confirmation of the wall surface material 11 and confirmation that a predetermined clearance is secured between the inner wall of the restraint pipe 12 and the core material 21 are confirmed.

<5>充填材の充填。
拘束管12内に上方から充填材30を充填する。
充填材30は適切な打設速度で、拘束管12の上部まで充填する。
なお、充填方法は拘束管12上部からの落とし込みに限らず、拘束管12下部から圧入してもよい。
充填後、充填材30が拘束管12内に隙間なく充填されるようにバイブレーターで十分に締め固める。
<5> Filling with filler.
The restraint tube 12 is filled with the filler 30 from above.
The filler 30 is filled up to the upper portion of the restraint tube 12 at an appropriate driving speed.
In addition, the filling method is not limited to dropping from the upper part of the restraint pipe 12, but may be press-fitted from the lower part of the restraint pipe 12.
After filling, the filling material 30 is sufficiently compacted with a vibrator so that the constraining tube 12 is filled with no gap.

<6>充填材の硬化。
拘束管12内の充填材30が硬化して強度発現することによって、充填材30と拘束管12が相互に拘束し合って高耐力柱構造が構成される。
また、芯材21の頭部と、拘束管12と、充填材30とによって、前記壁面材に作用する背面土圧を前記杭体の地中部分に有効に伝達可能な、杭頭固定部Jが構成される。
<6> Curing of the filler.
When the filler 30 in the constraining tube 12 is hardened and develops strength, the filler 30 and the constraining tube 12 are constrained to each other to form a high strength column structure.
Moreover, the pile head fixing | fixed part J which can effectively transmit the back surface earth pressure which acts on the said wall surface material to the underground part of the said pile body with the head of the core material 21, the restraint pipe | tube 12, and the filler 30. Is configured.

<7>その後の工程。
擁壁パネル10の一箇所の立設が終わったら、隣の杭体20に<4>〜<6>の作業を繰り返して自立式擁壁1を水平方向に連続してゆく。
なお、本例では工程<1>〜<3>を擁壁パネル10の連続方向に沿って各工程まとめて行い、工程<4>〜<6>を杭体20ごとに行ったが、これに限られない。
例えば、全ての工程を水平方向にまとめて行うなど、適宜手順を変更してもよい。
<7> Subsequent steps.
When the standing of one place of the retaining wall panel 10 is finished, the operations of <4> to <6> are repeated on the adjacent pile body 20 to continue the self-supporting retaining wall 1 in the horizontal direction.
In this example, the steps <1> to <3> are performed together along the continuous direction of the retaining wall panel 10, and the steps <4> to <6> are performed for each pile body 20. Not limited.
For example, the procedure may be changed as appropriate, such as performing all steps in a horizontal direction.

[壁面材と拘束管の連結に係る他の実施例]
実施例1では、壁面材11と拘束管12とを、埋め込み構造の連結片11bと拘束管12のボルト締結を介して連結したが、これに限定されない。
例えば、壁面材11と拘束管12とを、壁面材11の壁面本体11aに穿設した複数の連結孔11eと拘束管12のボルト連結を介して連結してもよい。
より詳細には、拘束管12の一面から両側に延出する支持翼12aを設け、両支持翼12aを壁面本体11aに当接した状態で、支持翼12aに連通した連結ボルト13によって壁面本体11aにボルト締結してもよい(図6)。
あるいは、拘束管12の一面にボルト孔を穿設し、拘束管12の内部から壁面本体11aの連結孔11eに直接ボルト締結してもよい(図7)。
本例は、壁面材11が突起部を有さず完全にフラットな構造となるため、角材などを必要とせずに平積みできる。更に、構造が単純なので製造コストが安価になる。
また、連結孔11eには、コーン状破壊を回避するため、内部にネジ溝を設け、外部に凹凸などの壁面本体11a内への定着部を設けた連結補強材11fを埋設してもよい。連結補強材11fは略T字状に組んだ異形鉄筋に内ネジ加工を施した「Oインサート材」などとして入手できる。
[Other examples of connection between wall material and restraint pipe]
In the first embodiment, the wall surface material 11 and the constraining tube 12 are connected via the connecting piece 11b having the embedded structure and the bolt fastening of the constraining tube 12, but the present invention is not limited to this.
For example, the wall surface material 11 and the constraining tube 12 may be connected via a plurality of connecting holes 11 e drilled in the wall surface main body 11 a of the wall surface material 11 and bolt connection of the constraining tube 12.
More specifically, the wall surface main body 11a is provided by the connecting bolt 13 communicating with the support wing 12a in a state where the support wings 12a extending from one surface of the restraining tube 12 to both sides are provided and the both support wings 12a are in contact with the wall surface main body 11a. Bolts may be fastened (FIG. 6).
Alternatively, a bolt hole may be drilled on one surface of the restraint tube 12 and bolted directly from the inside of the restraint tube 12 to the connection hole 11e of the wall surface body 11a (FIG. 7).
In this example, since the wall surface material 11 does not have a protrusion and has a completely flat structure, the wall surface material 11 can be stacked flatly without requiring a square material or the like. Furthermore, since the structure is simple, the manufacturing cost is low.
Moreover, in order to avoid cone-shaped destruction, the connection hole 11e may be embed | buried with the connection reinforcement material 11f which provided the thread groove inside, and provided the fixing | fixed part to the wall surface main bodies 11a, such as an unevenness | corrugation, outside. The connection reinforcing material 11f can be obtained as an “O insert material” or the like in which a deformed reinforcing bar assembled in a substantially T shape is subjected to internal thread processing.

[芯材を拘束管の上方まで配した実施例]
実施例1では、芯材21の頭部のみを拘束管12内に突起させて杭頭固定部Jによる杭頭固定としたが、芯材21を拘束管12の上方まで延在させてもよい。例えば、芯材21の上部を拘束管12の全長にわたって配置してもよい。
本例の場合、CFT構造内に芯材21を付加することで、拘束管12の曲げ耐力が著しく向上するため、拘束管12を更に小型化することができる。
[Example in which the core material is arranged above the restraint pipe]
In the first embodiment, only the head portion of the core material 21 is protruded into the restraint pipe 12 and fixed to the pile head by the pile head fixing portion J. However, the core material 21 may be extended to above the restraint pipe 12. . For example, the upper portion of the core material 21 may be disposed over the entire length of the restraint tube 12.
In the case of this example, by adding the core material 21 in the CFT structure, the bending strength of the constraining tube 12 is remarkably improved, so that the constraining tube 12 can be further reduced in size.

[壁面材を分割構造とした実施例]
実施例1では、一本の拘束管12に対して一枚の壁面材11を組み合わせたが、壁面材11を上下分割構造として一本の拘束管12に複数の壁面材11を上下に連続して付設してもよい。
本例では、壁面材11を小分割化することで搬送や保管に便利となる。
また、施工にあたっては、拘束管12に下段の壁面材11のみを付設した状態で地盤に配置し、上段の壁面材11は連結片11bで拘束管12の側面をガイドしながら吊り下すことで、より小型の重機を用いつつ容易に施工することができる。
[Example of dividing wall surface material]
In the first embodiment, a single wall material 11 is combined with a single constraining tube 12. However, the wall material 11 is divided into upper and lower parts, and a plurality of wall materials 11 are connected to a single constraining tube 12 in the vertical direction. May be attached.
In this example, it becomes convenient for conveyance and storage by subdividing the wall surface material 11.
Moreover, in the construction, only the lower wall surface material 11 is attached to the restraint pipe 12 and placed on the ground, and the upper wall material 11 is suspended while guiding the side surface of the restraint pipe 12 with the connecting piece 11b. Construction can be easily performed while using smaller heavy machinery.

[拘束管を複数設けた実施例]
実施例1では、一枚の壁面材に対して一本の拘束管12を組み合わせたが、拘束管12を複数にして壁面材11背面の複数か所に付設してもよい。
本例では、壁面材11に付与される背面土圧を複数のCFT構造で分散支持することにより、拘束管12及び杭体20のサイズを更に小型可することができる。
[Example with multiple restraint tubes]
In the first embodiment, one constraining tube 12 is combined with one wall material, but a plurality of constraining tubes 12 may be provided at a plurality of locations on the back surface of the wall material 11.
In this example, the back surface earth pressure applied to the wall surface material 11 is dispersedly supported by a plurality of CFT structures, whereby the size of the restraint pipe 12 and the pile body 20 can be further reduced.

1 自立式擁壁
10 擁壁パネル
11 壁面材
11a 壁面本体
11b 連結片
11c 支持部
11d 連結部
11e 連結孔
11f 連結補強材
11g 鉄筋
12 拘束管
12a 支持翼
13 連結ボルト
20 杭体
21 芯材
22 改良体
30 充填材
J 杭頭固定部
DESCRIPTION OF SYMBOLS 1 Self-supporting retaining wall 10 Retaining wall panel 11 Wall material 11a Wall surface body 11b Connection piece 11c Support part 11d Connection part 11e Connection hole 11f Connection reinforcement 11g Reinforcement 12 Restraint tube 12a Support wing 13 Connection bolt 20 Pile body 21 Core material 22 Improvement Body 30 Filler J Pile head fixing part

Claims (5)

矩形面状の壁面材と、前記壁面材の背面に高さ方向に沿って連結した中空角形の拘束管と、を有する擁壁パネルと、
前記擁壁パネルの下方の地盤に埋設し、上部が前記拘束管の管内に突出する杭体と、
前記拘束管内に配置する充填材と、を備え、
前記充填材が前記拘束管内に一体に拘束されることによって高耐力柱構造を構成し、
前記壁面材は、壁面本体と、一部が前記壁面本体内に埋設され他部が前記壁面本体の背面から突出した複数の連結片と、を有し、
前記連結片は、面状の支持部と、前記支持部の一面の中央から突起する連結部と、を備えた断面略T字形状を呈し、
前記連結部が前記壁面本体の背面から突出し、
前記壁面材と前記拘束管を、前記拘束管の両側面に添接した前記連結部を介して連結したことを特徴とする、
自立式擁壁。
A retaining wall panel having a rectangular wall surface material, and a hollow rectangular restraint tube connected to the back surface of the wall surface material along the height direction;
A pile body embedded in the ground below the retaining wall panel, and an upper portion protruding into the pipe of the restraint pipe;
A filler disposed in the restraint tube,
The high-strength column structure is configured by the filler being restrained integrally in the restraint pipe ,
The wall surface material has a wall surface main body, and a plurality of connecting pieces partially embedded in the wall surface main body and other portions protruding from the back surface of the wall surface main body,
The connection piece has a substantially T-shaped cross section including a planar support portion and a connection portion protruding from the center of one surface of the support portion,
The connecting portion protrudes from the back surface of the wall surface body,
The wall surface material and the constraining tube are connected via the connecting portions that are in contact with both side surfaces of the constraining tube ,
Free-standing retaining wall.
前記杭体の頭部のみが前記拘束管内に突出し、前記杭体の頭部と、前記充填材と、前記拘束管とによって、前記壁面材に作用する背面土圧を前記杭体の地中部分に有効に伝達可能な、杭頭固定部を構成したことを特徴とする、請求項1に記載の自立式擁壁。   Only the head of the pile body protrudes into the restraint pipe, and the back earth pressure acting on the wall surface material by the head of the pile body, the filler, and the restraint pipe is used as an underground part of the pile body. The self-supporting retaining wall according to claim 1, wherein a pile head fixing portion that can be effectively transmitted is configured. 前記壁面本体は有筋のコンクリートパネルであって、前記連結片が前記壁面本体内の鉄筋と係合していることを特徴とする、請求項又はに記載の自立式擁壁。 The self-supporting retaining wall according to claim 1 or 2 , wherein the wall surface body is a reinforced concrete panel, and the connecting piece is engaged with a reinforcing bar in the wall surface body. 前記壁面材は、複数の分割壁面材を高さ方向に連続してなることを特徴とする、請求項1乃至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 wall surface material is formed by continuously connecting a plurality of divided wall surface materials in a height direction. 前記杭体は、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、前記芯材の上部が前記拘束管内に突出することを特徴とする、請求項1乃至のいずれか一項に記載の自立式擁壁。 The pile body includes an improved body formed from the ground surface to the ground, and a core material having a lower portion concentrically arranged in the improved body, and an upper portion of the core material projects into the restraint pipe. The self-supporting retaining wall according to any one of claims 1 to 4 .
JP2017247867A 2017-12-25 2017-12-25 Self-supporting retaining wall Active JP6385554B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017247867A JP6385554B1 (en) 2017-12-25 2017-12-25 Self-supporting retaining wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017247867A JP6385554B1 (en) 2017-12-25 2017-12-25 Self-supporting retaining wall

Publications (2)

Publication Number Publication Date
JP6385554B1 true JP6385554B1 (en) 2018-09-05
JP2019112849A JP2019112849A (en) 2019-07-11

Family

ID=63444236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017247867A Active JP6385554B1 (en) 2017-12-25 2017-12-25 Self-supporting retaining wall

Country Status (1)

Country Link
JP (1) JP6385554B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07233661A (en) * 1994-02-23 1995-09-05 Natl House Ind Co Ltd Outdoor wall construction material
JPH0892981A (en) * 1994-09-29 1996-04-09 Jiotetsuku Kk Earth retaining wall
JP2000328586A (en) * 1999-05-24 2000-11-28 Modern Material:Kk Retaining wall
JP2006063779A (en) * 2004-08-26 2006-03-09 Takeshige Shimonohara Structural material and its joint structure
KR20080077721A (en) * 2007-02-21 2008-08-26 대명콘텍 주식회사 The method of constructing bloclk for wall
JP2015063794A (en) * 2013-09-24 2015-04-09 日特建設株式会社 Retaining wall and method for constructing the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07233661A (en) * 1994-02-23 1995-09-05 Natl House Ind Co Ltd Outdoor wall construction material
JPH0892981A (en) * 1994-09-29 1996-04-09 Jiotetsuku Kk Earth retaining wall
JP2000328586A (en) * 1999-05-24 2000-11-28 Modern Material:Kk Retaining wall
JP2006063779A (en) * 2004-08-26 2006-03-09 Takeshige Shimonohara Structural material and its joint structure
KR20080077721A (en) * 2007-02-21 2008-08-26 대명콘텍 주식회사 The method of constructing bloclk for wall
JP2015063794A (en) * 2013-09-24 2015-04-09 日特建設株式会社 Retaining wall and method for constructing the same

Also Published As

Publication number Publication date
JP2019112849A (en) 2019-07-11

Similar Documents

Publication Publication Date Title
KR100999020B1 (en) Composite phc pile and construction method using the same
JP6703845B2 (en) Foundation structure
KR101632701B1 (en) Circular prefabricated structure for column, Top down method and Construction method of frame using the same
JP5023219B2 (en) Precast temporary structure and construction method thereof
JP2013249709A (en) Pile reinforcing structure for existing building, and constructing method thereof
JP2009007745A (en) Axial-force transmission structure for permanent sub-substructural column and foundation pile, and construction method for permanent sub-substructural column
JP4912030B2 (en) Junction structure between pier and pile
US9238921B2 (en) Method and arrangements relating to foundation for antenna mast of wireless communication system
KR101631447B1 (en) Top-Down method of underground structure using the CFT and the Composite Beam
JP2017095888A (en) Steel column-pile junction structure
KR100803558B1 (en) A reinforcing single column drilled pier foundation and construction method thereof
JP2000352296A (en) Method o constructing passage just under underground structure
JP6385554B1 (en) Self-supporting retaining wall
JP5456627B2 (en) Connection structure and method of connection between pile and steel column
KR102085723B1 (en) Reinforced earth wall&#39;s reinforcement device
KR100808977B1 (en) Connecting structure of corner supporting beam for temporary soil sheathing work
KR101701495B1 (en) Top-down construction method using steel tube column with horizontal and vertical reinforcement
KR102351779B1 (en) Phc pile for soil retaining wall
JP2004027727A (en) Foundation pile and construction method for foundation pile
JP4612422B2 (en) Construction method of structure and foundation structure used for it
JP6461690B2 (en) Foundation structure and foundation construction method
JP2014125797A (en) Composite retaining wall and construction method thereof
JP2018059318A (en) Foundation beam structure and method of constructing foundation beam
JP2011089320A (en) Method for constructing precast basement column
KR101255610B1 (en) Structure construction method and structure of use it

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180306

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20180306

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20180403

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180605

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180710

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20180724

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180807

R150 Certificate of patent or registration of utility model

Ref document number: 6385554

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250