JP7501868B2 - Retaining wall construction method - Google Patents
Retaining wall construction method Download PDFInfo
- Publication number
- JP7501868B2 JP7501868B2 JP2020153676A JP2020153676A JP7501868B2 JP 7501868 B2 JP7501868 B2 JP 7501868B2 JP 2020153676 A JP2020153676 A JP 2020153676A JP 2020153676 A JP2020153676 A JP 2020153676A JP 7501868 B2 JP7501868 B2 JP 7501868B2
- Authority
- JP
- Japan
- Prior art keywords
- connecting rod
- panel
- wall panel
- wall
- bar
- 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
Links
- 238000010276 construction Methods 0.000 title claims description 46
- 238000000034 method Methods 0.000 claims description 71
- 239000004567 concrete Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 17
- 230000002787 reinforcement Effects 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
Landscapes
- Retaining Walls (AREA)
Description
本発明は、擁壁の施工方法に関し、特に壁面パネル背面側での溶接作業が少なく、簡易な手段によって壁面パネルを確実に支保可能な、施工効率の高い擁壁の施工方法に関する。 The present invention relates to a method for constructing a retaining wall, and in particular to a method for constructing a retaining wall with high construction efficiency that requires less welding work on the back side of the wall panel and can reliably support the wall panel using simple means.
施工面の前面側にプレキャスト製の壁面パネルを積み上げ、壁面パネルの背面に間詰コンクリートを打設して構築する、ハーフプレキャスト擁壁が知られている。
特許文献１には、裏込材の施工において、メッシュホルダと透水性シート材を組み合わせて配置することを特徴としたハーフプレキャスト擁壁が開示されている。このハーフプレキャスト擁壁は、基礎コンクリート及び間詰コンクリートの各段にアンカー筋を埋設し、壁面パネルの積み上げごとに、アンカー筋と壁面パネルの背面の間に連結鉄筋を架け渡し、アンカー筋、連結鉄筋、及び壁面パネルの背面鉄筋とを、相互に溶接することで、壁面パネルを施工面に支保している。
A half-precast retaining wall is known, which is constructed by stacking precast wall panels on the front side of the construction surface and pouring filler concrete on the back side of the wall panels.
Patent Document 1 discloses a half-precast retaining wall characterized by combining and arranging mesh holders and water-permeable sheet materials in the construction of backfill materials. In this half-precast retaining wall, anchor bars are embedded in each layer of foundation concrete and filling concrete, and connecting bars are stretched between the anchor bars and the back surface of the wall panel for each wall panel stack, and the anchor bars, connecting bars, and back surface rebars of the wall panel are welded together to support the wall panel on the construction surface.
従来技術には以下の問題点が存在する。
＜１＞壁面パネルの積み上げごとに、間詰コンクリートへのアンカー筋の設置と、壁面パネルとアンカー筋の溶接が必要となるため、工程が多く施工効率が悪い。
＜２＞壁面パネル背面側の狭隘なスペースでアンカー筋や連結鉄筋の溶接を行う作業は煩雑で、施工の難度が高い。特に、壁面パネルの勾配を設計勾配に維持しつつ、アンカー筋に溶接する作業が難しい。
＜３＞雨天には溶接ができないため、施工が天候に左右される。
The prior art has the following problems.
<1> Each time a wall panel is stacked, it is necessary to install anchor bars in the filling concrete and weld the wall panel to the anchor bars, which requires many steps and results in poor construction efficiency.
<2> The work of welding the anchor bars and connecting rebars in the narrow space behind the wall panels is complicated and difficult to carry out. In particular, the work of welding to the anchor bars while maintaining the slope of the wall panels at the designed slope is difficult.
<3> Welding cannot be done in rainy weather, so construction is dependent on the weather.
本発明の目的は、以上のような問題点を解決できる、擁壁の施工方法を提供することにある。 The object of the present invention is to provide a method for constructing a retaining wall that can solve the above problems.
本発明の擁壁の施工方法は、パネル本体と、パネル本体の背面から離間しつつパネル本体の幅方向に沿って延在する背面鉄筋と、を備える壁面パネルを用いて、斜面又は直壁からなる施工面の前面にハーフプレキャスト擁壁を構築する、擁壁の施工方法であって、施工面前面の地盤上に基礎コンクリートを設置する、基礎構築工程と、基礎コンクリート上に、壁面パネルを立設し、壁面パネルを基礎コンクリートに連結する、基礎連結工程と、パネル本体の背面と背面鉄筋の間に、長尺状の連結杆を挿入して固定し、連結杆の上部を壁面パネルより上方に突出させる、連結杆固定工程と、壁面パネルの背面と施工面の間に、間詰コンクリートを打設して硬化させる、打設工程と、壁面パネルの上に、上段の壁面パネルを立設し、上段の壁面パネルのパネル本体の背面と背面鉄筋の間に連結杆を挿通する、パネル立設工程と、上段の壁面パネルのパネル本体の背面と背面鉄筋の間に、上段の連結杆を挿入して固定し、上段の連結杆の上部を上段の壁面パネルより上方に突出させる、連結杆延長工程と、を備え、打設工程と、パネル立設工程と、連結杆延長工程と、を繰り返し、最上段のパネル立設工程に続いて打設工程を行い、パネル立設工程において、上段の壁面パネルのパネル本体の背面を、下段の連結杆に沿わせることで、上段の壁面パネルの勾配を、下段の壁面パネルの勾配に対応させることを特徴とする。 The retaining wall construction method of the present invention is a method of constructing a half-precast retaining wall on the front side of a construction surface consisting of a slope or a straight wall, using a wall panel having a panel body and a back reinforcing bar that extends along the width direction of the panel body while being spaced apart from the back side of the panel body. The method includes a foundation construction process in which foundation concrete is placed on the ground in front of the construction surface, a foundation connection process in which a wall panel is erected on the foundation concrete and connected to the wall panel to the foundation concrete, a connecting rod fixing process in which a long connecting rod is inserted and fixed between the back side of the panel body and the back reinforcing bar, and the upper part of the connecting rod is protruded above the wall panel, and a connecting rod fixing process in which filling concrete is poured between the back side of the wall panel and the construction surface and allowed to harden. The method includes a casting process in which the upper wall panel is erected on top of the wall panel and a connecting rod is inserted between the back surface of the panel body of the upper wall panel and the back rebar, and a connecting rod extension process in which the upper connecting rod is inserted and fixed between the back surface of the panel body of the upper wall panel and the back rebar, causing the upper part of the upper connecting rod to protrude upward from the upper wall panel. The casting process, panel erection process, and connecting rod extension process are repeated, and the casting process is performed following the top panel erection process, and in the panel erection process, the back surface of the panel body of the upper wall panel is aligned with the lower connecting rod, thereby making the slope of the upper wall panel correspond to the slope of the lower wall panel.
本発明の擁壁の施工方法は、連結杆固定工程及び連結杆延長工程において、連結杆と背面鉄筋の間にクサビ材を介挿することで、連結杆をパネル本体の背面に押し付けて固定してもよい。 In the retaining wall construction method of the present invention, in the connecting rod fixing process and the connecting rod extension process, a wedge material may be inserted between the connecting rod and the rear reinforcing bar, so that the connecting rod is pressed against the rear surface of the panel body and fixed.
本発明の擁壁の施工方法は、連結杆が、短辺側の２つの側縁と長辺側の２つの側面を有する長尺の面材からなり、連結杆固定工程及び連結杆延長工程において、パネル本体の背面に連結杆の側縁を接面させて固定してもよい。 In the retaining wall construction method of the present invention, the connecting rod is made of a long panel having two short side edges and two long side surfaces, and in the connecting rod fixing process and connecting rod extension process, the side edges of the connecting rod may be fixed in contact with the back surface of the panel body.
本発明の擁壁の施工方法は、連結杆延長工程において、上段の連結杆の側面を、下段の連結杆の側面に接面させ、２本の連結杆を挟持具で挟み込むことで、２本の連結杆を連結してもよい。 In the retaining wall construction method of the present invention, in the connecting rod extension process, the side of the upper connecting rod may be brought into contact with the side of the lower connecting rod, and the two connecting rods may be clamped with a clamping tool to connect the two connecting rods.
本発明の擁壁の施工方法は、基礎コンクリートが、基礎コンクリートの上部に一部突起したアンカー筋を備え、基礎連結工程において、壁面パネルの背面鉄筋と、アンカー筋を、連結鉄筋で接続し、背面鉄筋、連結鉄筋、及びアンカー筋をそれぞれ溶接して相互に固定してもよい。 In the construction method for the retaining wall of the present invention, the foundation concrete has anchor bars that protrude partially from the top of the foundation concrete, and in the foundation connection process, the rear reinforcement of the wall panel and the anchor bars are connected with connecting bars, and the rear reinforcement, connecting bars, and anchor bars are each welded to each other to fix them together.
本発明の擁壁の施工方法は、次の効果のうち少なくとも一つを備える。
＜１＞壁面パネルの背面に連結杆を固定しながら連結杆を上方に延長するだけで、壁面パネルを確実に支保できるため、工数が少なく施工効率が高い。
＜２＞壁面パネル背面側における溶接作業がないため、施工が容易で狭隘な現場でも施工できる。
＜３＞壁面パネルを連結杆に沿って積み上げるだけで、上下の壁面パネルの勾配を自律的に一致させることができる。このため、施工が容易で施工精度が高い。
＜４＞基礎との連結以降、溶接作業がないため、天候に左右されず施工することができる。
The retaining wall construction method of the present invention has at least one of the following effects.
<1> By simply fixing the connecting rod to the back of the wall panel and extending it upward, the wall panel can be securely supported, reducing labor hours and increasing construction efficiency.
<2> Since there is no welding work required on the back side of the wall panel, installation is easy and can be done even in narrow work sites.
<3> By simply stacking the wall panels along the connecting rods, the slopes of the upper and lower wall panels can be made to match autonomously. This makes construction easy and highly accurate.
<4> Since no welding work is required after connection to the foundation, construction can be carried out regardless of the weather.
以下、図面を参照しながら本発明の擁壁の施工方法について詳細に説明する。 The construction method for the retaining wall of the present invention will be explained in detail below with reference to the drawings.
[擁壁の施工方法]
＜１＞全体の構成。
本発明の擁壁の施工方法は、斜面又は直壁からなる施工面の前面に、ハーフプレキャスト擁壁を構築する施工方法である。
本例では、施工面が斜面である場合について例示するが、同様の手順で直壁にも適用することができる。
本発明の擁壁の施工方法は、基礎構築工程Ｓ１と、基礎連結工程Ｓ２と、連結杆固定工程Ｓ３と、打設工程Ｓ４と、パネル立設工程Ｓ５、連結杆延長工程Ｓ６と、を少なくとも備える。
[Construction method of retaining walls]
<1> Overall structure.
The retaining wall construction method of the present invention is a construction method for constructing a half-precast retaining wall in front of a construction surface consisting of a slope or a straight wall.
In this example, the construction surface is an incline, but the same procedure can also be used for a straight wall.
The retaining wall construction method of the present invention includes at least a foundation construction process S1, a foundation connection process S2, a connecting rod fixing process S3, a concrete pouring process S4, a panel erection process S5, and a connecting rod extension process S6.
＜１．１＞壁面パネル（図２Ｂ）。
壁面パネル２０は、上下左右に並列して擁壁１の壁面を構成する面材である。
壁面パネル２０は、正面視矩形のコンクリート板からなるパネル本体２１と、パネル本体２１の背面側に延在する背面鉄筋２２と、を少なくとも備える、プレキャストコンクリートパネルである。
本例では背面鉄筋２２として、パネル本体２１内の鉄筋を一部背面側に突起して構成した複数のトラス筋２２ａと、複数のトラス筋２２ａに溶接した直線状の固定筋２２ｂの組合せからなる一体構造を採用する。
詳細には、パネル本体２１の背面から、複数のトラス筋２２ａをパネル本体２１の幅方向に沿って上下４列に並列し、２本の固定筋２２ｂをパネル本体２１の幅方向に沿って配置し、各固定筋２２ｂをそれぞれ上下２列のトラス筋２２ａの先端に溶接して固定する。
ただし背面鉄筋２２の構成はこれに限らず、例えばトラス筋２２ａを設けず、パネル本体２１内の鉄筋の一部をパネル本体２１の背面側に露出させ、パネル本体２１の幅方向に沿って延在させて背面鉄筋２２を構成してもよい。
要は、背面鉄筋２２がパネル本体２１と一体であって、パネル本体２１の背面から離間しつつ、パネル本体２１の幅方向に沿って延在する構造であればよい。
<1.1> Wall panel (Figure 2B).
The wall panels 20 are surface materials that are arranged in parallel vertically and horizontally to form the wall surface of the retaining wall 1.
The wall panel 20 is a precast concrete panel including at least a panel body 21 made of a concrete plate having a rectangular shape when viewed from the front, and a rear reinforcing bar 22 extending to the rear side of the panel body 21.
In this example, the rear reinforcement bars 22 are an integrated structure consisting of a combination of multiple truss bars 22a, which are formed by protruding some of the reinforcement bars inside the panel body 21 toward the rear side, and straight fixing bars 22b welded to the multiple truss bars 22a.
In detail, from the back surface of the panel body 21, multiple truss bars 22a are arranged in parallel in four rows, one above the other, along the width direction of the panel body 21, and two fixing bars 22b are arranged along the width direction of the panel body 21, and each fixing bar 22b is welded and fixed to the tips of the two upper and lower rows of truss bars 22a.
However, the configuration of the rear reinforcement 22 is not limited to this, and for example, the rear reinforcement 22 may be configured without providing truss reinforcement 22a, and a portion of the reinforcement within the panel main body 21 may be exposed to the rear side of the panel main body 21 and extended along the width direction of the panel main body 21.
In short, it is sufficient that the rear reinforcement bar 22 is integral with the panel body 21 and extends along the width direction of the panel body 21 while being spaced apart from the rear face of the panel body 21.
＜２＞基礎構築工程。
基礎構築工程Ｓ１は、基礎コンクリート１０を設置する工程である。
基礎構築工程Ｓ１は、詳細には例えば以下の手順で施工する。
施工面の前面の地盤を、施工範囲にわたって所定深さに掘削する。
掘削面上に基礎砕石を敷き均し、ランマ―等で転圧する。基礎砕石上に基礎コンクリート１０を打設する。
本例では、基礎コンクリート１０内に、所定の間隔で壁面パネル２０支保用のアンカー筋３１を埋設し、アンカー筋３１の上部を基礎コンクリート１０の上部から突起させる。アンカー筋３１には、例えば逆Ｖ字状に屈曲した鉄筋を用いることができる。
打設後、基礎コンクリート１０を所定時間養生する。
<2> Foundation construction process.
The foundation construction process S1 is a process of placing foundation concrete 10.
In detail, the foundation construction process S1 is carried out, for example, in the following manner.
The ground in front of the construction surface is excavated to a specified depth over the entire construction area.
Foundation crushed stone is spread evenly on the excavated surface and compacted with a rammer, etc. Foundation concrete 10 is poured on the foundation crushed stone.
In this example, anchor bars 31 for supporting the wall panel 20 are embedded at predetermined intervals in the foundation concrete 10, and the tops of the anchor bars 31 protrude from the top of the foundation concrete 10. The anchor bars 31 may be, for example, rebars bent into an inverted V shape.
After pouring, the foundation concrete 10 is cured for a predetermined period of time.
＜３＞基礎連結工程（図１）。
基礎連結工程Ｓ２は、基礎コンクリート１０上に、１段目の壁面パネル２０を立設して基礎コンクリート１０に連結する工程である。
基礎連結工程Ｓ２は、詳細には例えば以下の手順で施工する。
基礎コンクリ―ト１０上に壁面パネル２０を吊り下ろし、壁面パネル２０の前面を施工面の勾配に対応した設計上の勾配に傾斜させる。
同時に基礎コンクリート１０上に設置したアンカー筋３１と、壁面パネル２０の固定筋２２ｂとの間を連結鉄筋３２で接続し、アンカー筋３１と連結鉄筋３２、連結鉄筋３２と固定筋２２ｂ、をそれぞれ接点で溶接して相互に固定する。
なお、連結鉄筋３２の溶接先は固定筋２２ｂでなくトラス筋２２ａであってもよい。また、その他の公知の支保部材を用いてもよい。要は基礎コンクリート１０に１段目の壁面パネル２０を確実に連結できればよい。
以上によって、１段目の壁面パネル２０が、基礎連結材３０（アンカー筋３１及び連結鉄筋３２）を介して基礎コンクリート１０に確実に連結される。
本発明の擁壁の施工方法では、溶接作業は基礎連結工程Ｓ２に限られ、他の工程では行わないため、施工性及び施工の安全性が高い。
<3> Foundation connection process (Figure 1).
The foundation connection process S2 is a process of erecting the first layer of wall panel 20 on the foundation concrete 10 and connecting it to the foundation concrete 10.
In detail, the foundation connection process S2 is carried out, for example, in the following manner.
The wall panel 20 is suspended above the foundation concrete 10, and the front surface of the wall panel 20 is inclined to a design gradient corresponding to the gradient of the construction surface.
At the same time, the anchor bars 31 installed on the foundation concrete 10 are connected to the fixing bars 22b of the wall panel 20 with connecting bars 32, and the anchor bars 31 and the connecting bars 32, and the connecting bars 32 and the fixing bars 22b are welded to each other at their respective contact points.
The connecting rebars 32 may be welded to the truss bars 22a instead of the fixed bars 22b. Other known support members may be used. The point is that the first-stage wall panel 20 can be reliably connected to the foundation concrete 10.
As a result of the above, the first row of wall panels 20 are securely connected to the foundation concrete 10 via the foundation connecting materials 30 (anchor bars 31 and connecting steel bars 32).
In the retaining wall construction method of the present invention, welding work is limited to the foundation connection process S2 and is not performed in other processes, so that workability and construction safety are high.
＜４＞連結杆固定工程（図２Ａ）。
連結杆固定工程Ｓ３は、１段目の壁面パネル２０の背面に連結杆４０を固定する工程である。
連結杆４０は、後続する打設工程Ｓ４までの間、壁面パネル２０を支保する支保機能と、上下の壁面パネル２０の勾配を一致させる定規材の機能を併有する部材である。
本例では連結杆４０として、短辺側の２つの側縁４０ａと長辺側の２つの側面４０ｂを有する鋼製のフラットバー（平鋼）を採用する。
フラットバーは、長さが壁面パネル２０の高さより長く、２つの側縁４０ａ間の幅が、パネル本体２１の背面と固定筋２２ｂの間隔より小さいものを使用する。
なお、連結杆４０は、フラットバーに限らず、円形鋼棒や角形鋼棒等であってもよい。
連結杆固定工程Ｓ３は、詳細には例えば以下の手順で施工する。
<4> Connecting rod fixing process (Figure 2A).
The connecting rod fixing step S3 is a step of fixing the connecting rod 40 to the back surface of the first wall panel 20.
The connecting rod 40 is a component that has both a support function for supporting the wall panel 20 until the subsequent concrete pouring process S4, and a ruler function for matching the slopes of the upper and lower wall panels 20.
In this embodiment, the connecting rod 40 is a flat steel bar having two short side edges 40a and two long side surfaces 40b.
The flat bar used has a length greater than the height of the wall panel 20 and a width between the two side edges 40a smaller than the distance between the rear surface of the panel body 21 and the fixing bar 22b.
The connecting rod 40 is not limited to a flat bar, but may be a circular steel bar, a square steel bar, or the like.
In detail, the connecting rod fixing step S3 is carried out, for example, in the following manner.
＜４．１＞連結杆の挿入。
１段目の壁面パネル２０のパネル本体２１の背面と上下２本の固定筋２２ｂの間に、連結杆４０を挿入する。連結杆４０の上部は、壁面パネル２０の上縁より上方に突起させる。
本例では、連結杆４０のフラットバーを、パネル本体２１の背面に対して縦向きに当接させる。換言すると、フラットバーの側縁４０ａをパネル本体２１の背面に接面させる。
これによって、壁面パネル２０の荷重による連結杆４０の屈折を防ぎ、壁面パネル２０を安定して支保することができる。
連結杆４０の本数は、本例では１枚の壁面パネル２０に付き各２本である。ただしこれに限らず、例えば１枚の壁面パネル２０に付き３本以上としてもよい。
<4.1> Inserting the connecting rod.
A connecting rod 40 is inserted between the rear surface of the panel body 21 of the first wall panel 20 and the two upper and lower fixing bars 22b. The upper portion of the connecting rod 40 is made to protrude upward from the upper edge of the wall panel 20.
In this embodiment, the flat bar of the connecting rod 40 is vertically abutted against the rear surface of the panel main body 21. In other words, the side edge 40a of the flat bar is brought into contact with the rear surface of the panel main body 21.
This prevents bending of the connecting rod 40 due to the load of the wall panel 20, and enables the wall panel 20 to be stably supported.
In this embodiment, the number of connecting rods 40 is two for each wall panel 20. However, the number is not limited to this, and may be, for example, three or more for each wall panel 20.
＜４．２＞クサビ材による固定（図２Ｂ）。
連結杆４０の側縁４０ａと固定筋２２ｂとの間に上方からクサビ材５０を差し込む。
続いて、クサビ材５０の頭部をハンマーで叩く等することで、連結杆４０を、パネル本体２１の背面と固定筋２２ｂで前後方向に挟んで固定する。
同様の作業を連結杆４０と固定筋２２ｂの全ての交点において行う。
本例では、連結杆４０にクサビ材５０を組み合わせることで、連結杆４０の側縁４０ａをパネル本体２１の背面に押し付けて、連結杆４０の勾配を壁面パネル２０の勾配と一致させることができる。
なお、連結杆４０は、パネル本体２１の背面と固定筋２２ｂの間に限らず、例えばパネル本体２１の背面とトラス筋２２ａの間に挟んで固定してもよい。
また、パネル本体２１と固定筋２２ｂの間隔と連結杆４０の幅とのクリアランスが僅かである場合には、クサビ材５０を用いなくてもよい。
<4.2> Fixing with wedge material (Figure 2B).
A wedge 50 is inserted from above between the side edge 40a of the connecting rod 40 and the fixing bar 22b.
Next, the head of the wedge material 50 is struck with a hammer, for example, to clamp the connecting rod 40 in the front-rear direction between the rear surface of the panel main body 21 and the fixing bar 22b.
The same operation is carried out at all intersections between the connecting rods 40 and the fixing bars 22b.
In this example, by combining a wedge material 50 with the connecting rod 40, the side edge 40a of the connecting rod 40 can be pressed against the back surface of the panel main body 21, so that the slope of the connecting rod 40 can be made to match the slope of the wall panel 20.
In addition, the connecting rod 40 is not limited to being fixed between the rear surface of the panel main body 21 and the fixing bar 22b, but may be fixed, for example, by being sandwiched between the rear surface of the panel main body 21 and the truss bar 22a.
Furthermore, if the clearance between the panel body 21 and the fixing bar 22b and the width of the connecting rod 40 is small, the wedge material 50 does not need to be used.
＜５＞打設工程（図３）。
打設工程Ｓ４は、壁面パネル２０の背面側に、間詰コンクリート６０を打設する工程である。
打設工程Ｓ４は、詳細には例えば以下の手順で施工する。
壁面パネル２０の背面と施工面の間に、壁面パネル２０の上縁から数ｃｍ程度下がった高さまで、間詰コンクリート６０を打設する。これは、壁面パネル２０の継ぎ目と、間詰コンクリート６０の打ち継ぎ目とを、重ねないためである。
打設後、間詰コンクリート６０を所定時間養生する。
間詰コンクリート６０の硬化によって、壁面パネル２０背面に固定した連結杆４０が、間詰コンクリート６０及び背面鉄筋２２と一体化し、２段目の壁面パネル２０を支持可能な安定性を備える。
なお、本例では壁面パネル２０背面の施工面上に直接間詰コンクリート６０を打設しているが、実際の施工では、施工面に沿って裏込材を設置したり、壁面パネル２０に類似した構造の背面パネルを配置することができる。ただし、これらの構成は本発明の要点ではないため、記載を省略する。
<5> Pouring process (Figure 3).
The pouring process S4 is a process of pouring filler concrete 60 onto the rear side of the wall panel 20.
In detail, the casting process S4 is carried out, for example, in the following manner.
Filling concrete 60 is poured between the back surface of the wall panel 20 and the construction surface to a height several centimeters below the upper edge of the wall panel 20. This is to prevent the joints of the wall panel 20 and the pouring joints of the filling concrete 60 from overlapping.
After pouring, the filling concrete 60 is cured for a predetermined period of time.
As the filling concrete 60 hardens, the connecting rod 40 fixed to the back surface of the wall panel 20 becomes integrated with the filling concrete 60 and the back reinforcement bar 22, providing the stability to support the second tier of wall panels 20.
In this example, the filler concrete 60 is poured directly onto the construction surface behind the wall panel 20, but in actual construction, it is possible to install backfill material along the construction surface, or to place a back panel with a structure similar to that of the wall panel 20. However, since these configurations are not the main point of the present invention, their description will be omitted.
＜６＞パネル立設工程（図４）。
パネル立設工程Ｓ５は、下段の壁面パネル２０の上部に上段の壁面パネル２０を立設する工程である。
パネル立設工程Ｓ５は、詳細には例えば以下の手順で施工する。
１段目の壁面パネル２０の上部に、重機等を用いて、２段目の壁面パネル２０を吊り下ろす。この際、作業員は１段目の間詰コンクリート６０上を足場にして作業することができる。
吊り下ろし時、２段目の壁面パネル２０のパネル本体２１の背面と上下２列の固定筋２２ｂとの隙間に、１段目の壁面パネル２０に固定した連結杆４０の上部を挿通させる。
吊り下ろし後、壁面パネル２０を連結杆４０に凭せ掛け、パネル本体２１の背面を連結杆４０の側縁４０ａに接面させる。
<6> Panel installation process (Figure 4).
The panel erection process S5 is a process of erecting the upper wall panel 20 on top of the lower wall panel 20.
In detail, the panel erection process S5 is carried out, for example, in the following manner.
The second tier of wall panels 20 are hung down from the top of the first tier of wall panels 20 using heavy machinery or the like. At this time, workers can use the first tier of filling concrete 60 as a foothold to carry out their work.
When hanging down, the upper part of the connecting rod 40 fixed to the first wall panel 20 is inserted into the gap between the back surface of the panel body 21 of the second wall panel 20 and the upper and lower two rows of fixing bars 22b.
After hanging, the wall panel 20 is leaned against the connecting rod 40 so that the back surface of the panel body 21 is brought into contact with the side edge 40 a of the connecting rod 40 .
＜７＞連結杆延長工程（図５Ａ）。
連結杆延長工程Ｓ６は、下段の連結杆４０の上部に、上段の連結杆４０を接続する工程である。
連結杆延長工程Ｓ６は、詳細には例えば以下の手順で施工する。
<7> Connecting rod extension process (Figure 5A).
The connecting rod extension process S6 is a process of connecting the upper connecting rod 40 to the top of the lower connecting rod 40.
In detail, the connecting rod extension process S6 is carried out, for example, in the following manner.
＜７．１＞２本の連結杆の接続（図５Ｂ）。
２段目のパネル本体２１の背面と固定筋２２ｂの間に、２段目の連結杆４０を挿入し、上部を２段目の壁面パネル２０より上方に突起させる。
続いて、２段目の連結杆４０の側面を１段目の連結杆４０の側面に接面させ、２段目の連結杆４０の長手方向を１段目の連結杆４０の長手方向に沿わせた状態で、２本の連結杆４０を側面４０ｂから挟持具７０で挟み込んで接続する。
本例では挟持具７０として、事務用のダブルクリップを採用する。
ここで、挟持具７０による接続は、後述するクサビ材５０による固定に先立つ仮留めにすぎず、挟持具７０のみをもって上段の壁面パネル２０を支持するものではない。よって、連結杆４０の接続は、事務用のダブルクリップのような簡素な挟持具７０を用いて簡易に作業することができる。
なお、挟持具７０はダブルクリップに限らず、目玉クリップ、山形クリップ、樹脂製の結束帯等であってもよい。また、挟持具７０を使用せず、例えば連結杆４０として長孔のボルト孔を有するフラットバーを採用し、接面させた２本の連結杆４０のボルト孔にボルトを挿通して締結してもよい。
<7.1> Connection of two connecting rods (Fig. 5B).
The second-stage connecting rod 40 is inserted between the back surface of the second-stage panel body 21 and the fixing bar 22b, and its upper portion is made to protrude upward from the second-stage wall panel 20.
Next, the side surface of the second stage connecting rod 40 is brought into contact with the side surface of the first stage connecting rod 40, and the longitudinal direction of the second stage connecting rod 40 is aligned with the longitudinal direction of the first stage connecting rod 40, and the two connecting rods 40 are connected by clamping them from the side surface 40b with a clamping tool 70.
In this example, a double paperclip for office use is used as the clamping tool 70.
Here, the connection by the clamping tool 70 is merely a temporary fastening prior to fixing by the wedge material 50 described later, and the upper wall panel 20 is not supported only by the clamping tool 70. Therefore, the connection of the connecting rod 40 can be easily performed by using a simple clamping tool 70 such as an office double clip.
The clamping tool 70 is not limited to a double clip, and may be an eye clip, a mountain clip, a plastic cable tie, etc. Also, without using the clamping tool 70, for example, a flat bar having a long bolt hole may be used as the connecting rod 40, and a bolt may be inserted through the bolt hole of two connecting rods 40 that are in contact with each other to fasten them together.
＜７．２＞クサビ材による固定（図５Ｃ）。
仮固定した２本の連結杆４０の側縁４０ａと、固定筋２２ｂとの間に上方からクサビ材５０を差し込み、クサビ材５０の頭部をハンマーで叩く等することで、連結杆４０を、パネル本体２１の背面と固定筋２２ｂとで前後方向に挟んで固定する。
同様の作業を連結杆４０と固定筋２２ｂの全ての交点において行う。
これによって、連結杆４０を介して、１段目の壁面パネル２０が２段目の壁面パネル２０と確実に連結されると共に、２本の連結杆４０が一体に固定される。
また、１段目の連結杆４０は、１段目のパネル本体２１の背面に接面しているため、２段目のパネル本体２１の背面をこの連結杆４０の側縁４０ａに接面させることで、２段目の壁面パネル２０の勾配を１段目の壁面パネル２０の勾配と一致させることができる。
<7.2> Fixing with wedge material (Figure 5C).
A wedge material 50 is inserted from above between the side edges 40a of the two temporarily fixed connecting rods 40 and the fixing bars 22b, and the head of the wedge material 50 is struck with a hammer, for example, to clamp the connecting rods 40 in the front-to-rear direction between the back surface of the panel main body 21 and the fixing bars 22b.
The same operation is carried out at all intersections between the connecting rods 40 and the fixing bars 22b.
As a result, the first row of wall panels 20 are securely connected to the second row of wall panels 20 via the connecting rods 40, and the two connecting rods 40 are fixed together.
In addition, since the first tier connecting rod 40 is in contact with the back surface of the first tier panel main body 21, by bringing the back surface of the second tier panel main body 21 into contact with the side edge 40a of this connecting rod 40, the slope of the second tier wall panel 20 can be made to match the slope of the first tier wall panel 20.
＜８＞工程の繰り返し。
以後、２段目の打設工程、３段目のパネル立設工程（図６）、３段目の連結杆延長工程・・・のように、壁面パネル２０の所定の段数まで、打設工程Ｓ４、パネル立設工程Ｓ５、及び連結杆延長工程Ｓ６、を繰り返す。
ただし最上段より上方に連結杆４０を延長する必要はないので、最上段のパネル立設工程Ｓ５の後に打設工程Ｓ４を行い、施工を完了する。
<8> Repeat the process.
Thereafter, the casting process S4, the panel erection process S5, and the connecting rod extension process S6 are repeated, such as the second stage casting process, the third stage panel erection process (Figure 6), the third stage connecting rod extension process, and so on, until the predetermined number of stages of the wall panel 20 are reached.
However, since there is no need to extend the connecting rod 40 above the top row, the casting step S4 is carried out after the panel erection step S5 of the top row, and construction is completed.
１ 擁壁
１０ 基礎コンクリート
２０ 壁面パネル
２１ パネル本体
２２ 背面鉄筋
２２ａ トラス筋
２２ｂ 固定筋
３０ 基礎連結材
３１ アンカー筋
３２ 連結鉄筋
４０ 連結杆（フラットバー）
４０ａ 側縁
４０ｂ 側面
５０ クサビ材
６０ 間詰コンクリート
７０ 挟持具（ダブルクリップ）
REFERENCE SIGNS LIST 1 retaining wall 10 foundation concrete 20 wall panel 21 panel body 22 back reinforcement 22a truss reinforcement 22b fixing reinforcement 30 foundation connecting material 31 anchor reinforcement 32 connecting reinforcement 40 connecting rod (flat bar)
40a Side edge 40b Side surface 50 Wedge material 60 Filling concrete 70 Clamping tool (double clip)
Claims (3)
前記施工面前面の地盤上に基礎コンクリートを設置する、基礎構築工程と、
前記基礎コンクリート上に、前記壁面パネルを立設し、前記壁面パネルを前記基礎コンクリートに連結する、基礎連結工程と、
前記パネル本体の背面と前記背面鉄筋の間に、短辺側の２つの側面と長辺側の２つの側面を有する長尺状の平鋼からなる連結杆を挿入して固定し、前記連結杆の上部を前記壁面パネルより上方に突出させる、連結杆固定工程と、
前記壁面パネルの背面と前記施工面の間に、間詰コンクリートを打設して硬化させる、打設工程と、
前記壁面パネルの上に、上段の壁面パネルを立設し、前記上段の壁面パネルのパネル本体の背面と背面鉄筋の間に前記連結杆を挿通する、パネル立設工程と、
前記上段の壁面パネルのパネル本体の背面と背面鉄筋の間に、上段の前記連結杆を挿入して固定し、前記上段の連結杆の上部を前記上段の壁面パネルより上方に突出させる、連結杆延長工程と、を備え、
前記打設工程と、前記パネル立設工程と、前記連結杆延長工程と、を繰り返し、最上段の前記パネル立設工程に続いて前記打設工程を行い、
前記パネル立設工程において、前記上段の壁面パネルのパネル本体の背面を、下段の前記連結杆の短辺側の側面に沿わせることで、前記上段の壁面パネルの勾配を、下段の前記壁面パネルの勾配に対応させ、
前記連結杆延長工程において、前記下段の連結杆の長辺側の側面と前記上段の連結杆の長辺側の側面を接面させ、前記下段の連結杆及び前記上段の連結杆と前記背面鉄筋の間にクサビ材を打ち込むことで、前記下段の連結杆及び前記上段の連結杆を前記パネル本体の背面に押し付けて一体に固定することを特徴とする、
擁壁の施工方法。 A method for constructing a retaining wall, comprising: constructing a half-precast retaining wall on the front side of a construction surface consisting of a slope or a straight wall, using a wall panel including a panel body and a back reinforcing bar extending along the width direction of the panel body while being spaced apart from the back side of the panel body;
A foundation construction process of placing foundation concrete on the ground in front of the construction surface;
a foundation connecting step of erecting the wall panel on the foundation concrete and connecting the wall panel to the foundation concrete;
A connecting rod fixing process for inserting and fixing a connecting rod made of a long flat steel having two short side surfaces and two long side surfaces between the rear surface of the panel body and the rear steel bar, and protruding an upper portion of the connecting rod above the wall panel;
A pouring process of pouring and hardening filler concrete between the back surface of the wall panel and the construction surface;
A panel erection process of erecting an upper wall panel on the wall panel and inserting the connecting rod between the rear surface of the panel body of the upper wall panel and the rear reinforcing bar;
and a connecting rod extension process for inserting and fixing the upper connecting rod between the rear surface of the panel body of the upper wall panel and the rear reinforcing bar, and protruding an upper portion of the upper connecting rod upward from the upper wall panel.
The casting process, the panel erection process, and the connecting rod extension process are repeated, and the casting process is performed following the uppermost panel erection process,
In the panel erection process, the back surface of the panel body of the upper wall panel is aligned with the side surface of the short side of the lower connecting rod, so that the slope of the upper wall panel corresponds to the slope of the lower wall panel ;
In the connecting rod extension process, the side surface of the long side of the lower connecting rod is brought into contact with the side surface of the long side of the upper connecting rod, and a wedge material is driven between the lower connecting rod, the upper connecting rod and the rear reinforcing bar, thereby pressing the lower connecting rod and the upper connecting rod against the rear surface of the panel body and fixing them together .
How to construct a retaining wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020153676A JP7501868B2 (en) | 2020-09-14 | 2020-09-14 | Retaining wall construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020153676A JP7501868B2 (en) | 2020-09-14 | 2020-09-14 | Retaining wall construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2022047737A JP2022047737A (en) | 2022-03-25 |
| JP7501868B2 true JP7501868B2 (en) | 2024-06-18 |
Family
ID=80781248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020153676A Active JP7501868B2 (en) | 2020-09-14 | 2020-09-14 | Retaining wall construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP7501868B2 (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188148A (en) | 2000-12-20 | 2002-07-05 | Hirose & Co Ltd | Outer wall panel for bubble-mixed lightweight fill and banking method |
| JP2003020746A (en) | 2001-07-09 | 2003-01-24 | Joji Yamashita | Form panel for both construction of wall surface and external facing in common use, and manufacturing method therefor |
| JP2004060413A (en) | 2002-07-25 | 2004-02-26 | Takeshige Shimonohara | Residual form and its connecting method |
| JP2004218256A (en) | 2003-01-14 | 2004-08-05 | Sekisui Plastics Co Ltd | Wall face material fixing structure in lightweight banking construction and columnar support used therefor |
| JP3115887U (en) | 2005-08-19 | 2005-11-17 | 株式会社ヤマックス | Residual formwork panel |
| JP2006328720A (en) | 2005-05-24 | 2006-12-07 | Amii Solutions:Kk | Reinforced earth retaining wall |
| JP2015031105A (en) | 2013-08-06 | 2015-02-16 | 松六コンクリート工業株式会社 | Retaining wall structure and construction method of retaining wall |
| JP2019019616A (en) | 2017-07-20 | 2019-02-07 | フリー工業株式会社 | Wall surface structure and method for constructing wall surface |
| JP2020012310A (en) | 2018-07-19 | 2020-01-23 | 松六コンクリート工業株式会社 | Retaining wall construction method and backing layer construction member |
| JP2020090865A (en) | 2018-12-06 | 2020-06-11 | 晋市 湯田 | Wall surface construction method and wall surface structure |
-
2020
- 2020-09-14 JP JP2020153676A patent/JP7501868B2/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188148A (en) | 2000-12-20 | 2002-07-05 | Hirose & Co Ltd | Outer wall panel for bubble-mixed lightweight fill and banking method |
| JP2003020746A (en) | 2001-07-09 | 2003-01-24 | Joji Yamashita | Form panel for both construction of wall surface and external facing in common use, and manufacturing method therefor |
| JP2004060413A (en) | 2002-07-25 | 2004-02-26 | Takeshige Shimonohara | Residual form and its connecting method |
| JP2004218256A (en) | 2003-01-14 | 2004-08-05 | Sekisui Plastics Co Ltd | Wall face material fixing structure in lightweight banking construction and columnar support used therefor |
| JP2006328720A (en) | 2005-05-24 | 2006-12-07 | Amii Solutions:Kk | Reinforced earth retaining wall |
| JP3115887U (en) | 2005-08-19 | 2005-11-17 | 株式会社ヤマックス | Residual formwork panel |
| JP2015031105A (en) | 2013-08-06 | 2015-02-16 | 松六コンクリート工業株式会社 | Retaining wall structure and construction method of retaining wall |
| JP2019019616A (en) | 2017-07-20 | 2019-02-07 | フリー工業株式会社 | Wall surface structure and method for constructing wall surface |
| JP2020012310A (en) | 2018-07-19 | 2020-01-23 | 松六コンクリート工業株式会社 | Retaining wall construction method and backing layer construction member |
| JP2020090865A (en) | 2018-12-06 | 2020-06-11 | 晋市 湯田 | Wall surface construction method and wall surface structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022047737A (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2013011102A (en) | Method of laying honeycomb three-dimensional solid cell structure block on slope | |
| KR20080100740A (en) | Strut system of temporary plate with opening supporting temporary retaining wall and subgrade external wall construction method utilizing the same | |
| JP7501868B2 (en) | Retaining wall construction method | |
| KR102269141B1 (en) | Deck plate wall installation method using underground pavement | |
| JP2003336213A (en) | Concrete receiving beam and method for building girder by using it | |
| KR102141679B1 (en) | Freestanding sheathing construction method using I-type buttress | |
| KR100919921B1 (en) | Retaining Wall using Panel and Constructing Method thereof | |
| JP2006207317A (en) | Construction method of concrete structure | |
| JP4385127B2 (en) | Slope protection retaining wall construction method and retaining wall building unit | |
| KR20040051182A (en) | Temporary soil sheathing using prestress and pile thereof | |
| JP5748998B2 (en) | Wall structure | |
| JP6690988B2 (en) | How to build a composite foundation structure | |
| JPS63280153A (en) | Underground inverted lining method | |
| JP2001342639A (en) | Buried form | |
| KR102550128B1 (en) | Demolition and new construction method of underground retaining wall using H-beam technology to which tensile stress is applied | |
| JP2014173305A (en) | Arc form and structure of retaining wall | |
| JP5766828B2 (en) | Method for installing solar cell module installation stand and solar cell module installation stand | |
| KR102464866B1 (en) | Constructing method for soundproof wall foundation and soundproof wall foundation constructed by the same | |
| KR101557554B1 (en) | Construction method of jointless bridge using wide PSC beam | |
| KR102197109B1 (en) | Slab unit implanted with means for pressing pile and the method for carrying out the construction of the retaining wall using it | |
| JP2010156178A (en) | Foundation structure and foundation construction method for large-scale temporary structure such as temporary roof | |
| JP5809423B2 (en) | Wall construction method | |
| JP3319709B2 (en) | Construction method of prestressed concrete steel beam | |
| JP4238169B2 (en) | Formwork device and formwork fixing parts | |
| JPH08302689A (en) | Construction method for skeleton of underground exterior wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20230530 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20240126 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20240130 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20240227 |
|
| 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: 20240521 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20240529 |