JP2020012310A - Retaining wall construction method and backing layer construction member - Google Patents

Retaining wall construction method and backing layer construction member Download PDF

Info

Publication number
JP2020012310A
JP2020012310A JP2018135571A JP2018135571A JP2020012310A JP 2020012310 A JP2020012310 A JP 2020012310A JP 2018135571 A JP2018135571 A JP 2018135571A JP 2018135571 A JP2018135571 A JP 2018135571A JP 2020012310 A JP2020012310 A JP 2020012310A
Authority
JP
Japan
Prior art keywords
backing material
mesh holder
backing
construction
height
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.)
Pending
Application number
JP2018135571A
Other languages
Japanese (ja)
Inventor
修 浅田
Osamu Asada
修 浅田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MATSUROKU CONCRETE KOGYO KK
Original Assignee
MATSUROKU CONCRETE KOGYO KK
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 MATSUROKU CONCRETE KOGYO KK filed Critical MATSUROKU CONCRETE KOGYO KK
Priority to JP2018135571A priority Critical patent/JP2020012310A/en
Publication of JP2020012310A publication Critical patent/JP2020012310A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Retaining Walls (AREA)

Abstract

To facilitate construction and reduce the number of man-hours and improve work efficiency, and also to reduce the cost and quality of the whole construction, and to improve safety.SOLUTION: A back layer construction step Sn is provided in which: a mesh holder 2 having at least a vertical surface portion 2v set to a required height Hv for compaction of a backing material B via a bent portion Xs by combining a wire members E... in advance, and a horizontal surface portion 2h selected to a predetermined length Lh, and a water-permeable sheet material 3 attached to the mesh holder 2 are prepared, the mesh holder 2 is installed in an area Zm for applying the backing material B at the time of applying the backing material B, the water-permeable sheet material 3 is attached to a part or all of a storage surface 2i of the mesh holder 2 that stores the backing material B, and a single-stage layer building construction for building the backing material single-stage layer portion 4 is sequentially performed up to a predetermined number N of steps along a worked surface Gf by storing the backing material B in the mesh holder 2 including this water-permeable sheet material 3 and compacting it.SELECTED DRAWING: Figure 1

Description

本発明は、道路，護岸，宅地造成等の法面に対する擁壁を構築する際に用いて好適な擁壁の施工方法及び裏込層構築部材に関する。   The present invention relates to a construction method of a retaining wall suitable for use when constructing a retaining wall for a slope such as a road, a seawall, a residential area development, and a backing layer construction member.

一般に、地面に対して所定の角度で傾斜した被施工面に対して、裏込材を施工するとともに、地面に対して所定角度で傾斜し、かつ縦方向及び／又は横方向に配列する一又は二以上の壁面部材を施工し、前記裏込材と前記壁面部材間にコンクリートを打設することにより擁壁を構築するブロック積擁壁タイプの施工方法としては、特許文献１に開示される擁壁の施工方法が知られている。この施工方法は、裏型枠を用いるコンクリートブロックの擁壁施工において、施工時間の短縮を可能とし、かつ作業の安全性向上を図ることを目的としたものであり、具体的には、控部を有する積みブロックを、法面と間隔を置いて組積みするとともに、控部と法面との間にネットにより仕切り、このネットと法面との間に裏込材を投入して締固めるとともに、積みブロックとネットとの間にコンクリートを打設するものである。   In general, a backing material is applied to a work surface inclined at a predetermined angle with respect to the ground, and one or both of which are inclined at a predetermined angle with respect to the ground and are arranged in a vertical direction and / or a horizontal direction. A block retaining wall type construction method of constructing a retaining wall by constructing two or more wall members and placing concrete between the backing material and the wall member is disclosed in Patent Document 1. Wall construction methods are known. This construction method is intended to shorten the construction time and to improve the safety of work in retaining wall construction of concrete blocks using a back formwork. While stacking the stacking blocks with the slope at an interval, partitioning the net between the retaining part and the slope with a backing material between this net and the slope and compacting Concrete is cast between the pile block and the net.

しかし、この施工方法は、基本的に、傾斜した法面と積みブロック間に、裏込材を投入して締固める方法のため、地面に対する法面及び積みブロックの傾斜角が緩やかになる場合、或いは法面と積みブロック間が狭い場合などの条件下では、積みブロックが障害となり、裏込材を投入した後におけるプレートコンパクターやタイピングランマー等の作業機械による締固めを容易に行うことができない。結局、この場合、十分な締固めを行うことができないとともに、作業性の悪化や安全性の低下を招く問題があり、この問題に対処する工法も提案されている。   However, this construction method is basically a method of inserting backing material between the sloped slope and the building block and compacting it, so if the slope of the slope and the building block with respect to the ground becomes gentle, Alternatively, under conditions such as when the gap between the slope and the stacking block is narrow, the stacking block becomes an obstacle, and compaction by a working machine such as a plate compactor or a typing rammer after the backing material has been introduced cannot be easily performed. Eventually, in this case, there is a problem that sufficient compaction cannot be performed, workability is deteriorated, and safety is reduced, and a construction method that addresses this problem has been proposed.

従来、この問題に対処する工法としては、特許文献２に開示される擁壁の施工方法が知られている。この施工方法は、運搬・据付重量を軽減して組積み作業を容易にし、背面構造との一体化を可能にすることを目的としたものであり、具体的には、前面ブロックと、この前面ブロックの背面側に設けられる裏込め材充填部と、この裏込め材充填部のコンクリート部及び砕石類に巻くジオテキスタイルとを備え、前面ブロックを積み上げると共に左右方向に並べ、個々の前面ブロックの裏込め材充填部を囲んで巻き付けるようにジオテキスタイルを配置するとともに、前面ブロックと法面との間に裏込め材を充填して単位擁壁構造体を形成し、ジオテキスタイルにより前面ブロックと裏込め材とが一体化されることにより、裏込め材がジオテキスタイルに巻かれて補強されるようにしたものである。   Conventionally, as a method of addressing this problem, a retaining wall construction method disclosed in Patent Document 2 is known. The purpose of this construction method is to reduce the transportation and installation weight, to facilitate the stacking work, and to enable integration with the rear structure. Specifically, the front block and the front A backfill material filling section provided on the back side of the block, and a geotextile wound around the concrete part and crushed stone of the backfill material filling section. The geotextile is arranged so as to be wound around the material filling section, and the backfill is filled between the front block and the slope to form a unit retaining wall structure.The front block and the backfill are formed by the geotextile. By being integrated, the backfill material is wound around the geotextile and reinforced.

特開平５−１８７０２９号公報JP-A-5-187029 特開２００５−９７９４９号公報JP 2005-97949 A

しかし、上述した特許文献２に開示される従来における擁壁の施工方法は、次のような問題点があった。   However, the conventional retaining wall construction method disclosed in Patent Document 2 described above has the following problems.

第一に、一つ一つの前面ブロックに対して、Ｚ形，コの字型を含む二つ或いは三つのジオテキスタイルを組合わせて使用するとともに、各ジオテキスタイルは、前面ブロックに対して付設することにより、各前面ブロック毎の単位擁壁構造体を構成するため、二つ或いは三つの異なる形状を有するジオテキスタイルを、各前面ブロック毎に用意する必要があり、施工に使用する部材点数が多くなる。したがって、保管や搬送面において不利になるとともに、部材コストの上昇により、施工全体のコストアップを招く。   First, two or three geotextiles including a Z-shape and a U-shape are used in combination for each front block, and each geotextile is attached to the front block. In order to form a unit retaining wall structure for each front block, it is necessary to prepare geotextiles having two or three different shapes for each front block, and the number of members used for construction increases. Therefore, it is disadvantageous in terms of storage and transport, and the cost of the entire construction increases due to an increase in member costs.

第二に、各ジオテキスタイルを、前面ブロックに対して付設することにより、各前面ブロック毎の単位擁壁構造体を構成するため、施工が大変となる。また、例示されるブロック状の前面ブロックには適用できるとしても、パネル状の前面ブロックの場合には適用が困難になるなど、適応性及び汎用性に劣る。しかも、適用できたとしても、ジオテキスタイルを前面ブロック側に付設するため、裏込材を投入して作業機械により締固めを行う場合における容易性や作業性についてはほとんど解消されない。   Secondly, since each geotextile is attached to the front block to form a unit retaining wall structure for each front block, the construction is difficult. Further, even if the present invention can be applied to the illustrated block-shaped front block, it is difficult to apply to the panel-shaped front block, and the adaptability and versatility are poor. Moreover, even if it can be applied, since the geotextile is attached to the front block side, easiness and workability in the case where a backing material is inserted and compaction is performed by a working machine are hardly solved.

本発明は、このような背景技術に存在する課題を解決した擁壁の施工方法及び裏込層構築部材の提供を目的とするものである。   An object of the present invention is to provide a retaining wall construction method and a backing layer construction member that solve the problems existing in such background art.

本発明に係る擁壁の施工方法は、上述した課題を解決するため、地面Ｇｅに対して所定角度Ｒｍで傾斜した被施工面Ｇｆに対して、裏込材Ｂを施工するとともに、地面Ｇｅに対して所定角度Ｒｗで傾斜し、かつ縦方向及び／又は横方向に配列する一又は二以上の壁面部材Ｗｐ…を施工し、裏込材Ｂと壁面部材Ｗｐ…間に中込コンクリートＣを打設することにより擁壁１を構築するに際し、予め、線部材Ｅ…を組合わせることにより、折曲部Ｌ１…を介して裏込材Ｂに対する締固め要求高さＨｖに設定した垂直面部２ｖ及び所定長さＬｈに選定した水平面部２ｈを少なくとも有してなるメッシュホルダ２，及びメッシュホルダ２に付設する透水性シート材３を用意し、裏込材Ｂの施工時に、メッシュホルダ２を、裏込材Ｂを施工する領域Ｚｍ内に設置するとともに、メッシュホルダ２における裏込材Ｂを収容する収容面２ｉの一部又は全部に透水性シート材３を付設し、この透水性シート材３を含むメッシュホルダ２に、裏込材Ｂを収容するとともに、締固めを行うことにより、裏込材単段層部４を構築する単段層構築施工を、被施工面Ｇｆに沿って所定段数Ｎまで順次行う背面層施工工程Ｓｎを少なくとも含ませてなることを特徴とする。   The method for constructing a retaining wall according to the present invention, in order to solve the above-described problem, applies the backing material B to the work surface Gf inclined at a predetermined angle Rm with respect to the ground Ge, and also applies the backing material B to the ground Ge. On the other hand, one or more wall members Wp, which are inclined at a predetermined angle Rw and are arranged in the vertical and / or horizontal direction, are constructed, and the concrete C is poured between the backing material B and the wall members Wp. When the retaining wall 1 is constructed, by combining the wire members E in advance, the vertical surface portion 2v set to the required compaction height Hv with respect to the backing material B via the bent portions L1. A mesh holder 2 having at least a horizontal surface portion 2h selected to have a length Lh and a water-permeable sheet material 3 attached to the mesh holder 2 are prepared, and when the backing material B is applied, the mesh holder 2 is backed up. In the area Zm where the material B is to be installed At the same time, the permeable sheet material 3 is attached to a part or the whole of the accommodation surface 2i of the mesh holder 2 that accommodates the backing material B, and the backing material B is attached to the mesh holder 2 including the permeable sheet material 3. At least a back layer construction step Sn for sequentially performing up to a predetermined number N of steps along the work surface Gf by performing compaction to perform the single-layer construction for constructing the backing material single-layer section 4. It is characterized by being included.

また、本発明に係る裏込層構築部材１０は、上述した課題を解決するため、地面Ｇｅに対して所定角度Ｒｗで傾斜した被施工面Ｇｆに対して裏込材Ｂを施工して擁壁１を構築する際に用いる裏込層構築部材であって、線部材Ｅ…を組合わせることにより、折曲部Ｌ１…を介して裏込材Ｂに対する締固め要求高さＨｖに設定した垂直面部２ｖ及び所定長さＬｈに選定した水平面部２ｈを少なくとも有してなるメッシュホルダ２，及びメッシュホルダ２における裏込材Ｂを収容する収容面２ｉの一部又は全部に付設する透水性シート材３を具備してなることを特徴とする。   In addition, in order to solve the above-described problem, the backing layer construction member 10 according to the present invention constructs the backing material B on the work surface Gf inclined at a predetermined angle Rw with respect to the ground Ge to retain the retaining wall. 1 is a backing layer construction member used when constructing No. 1 and a vertical surface portion set to a required compaction height Hv with respect to the backing material B via the bent portions L1. 2v and a mesh holder 2 having at least a horizontal plane portion 2h selected to a predetermined length Lh, and a water-permeable sheet material 3 attached to a part or all of a storage surface 2i of the mesh holder 2 that stores a backing material B. It is characterized by comprising.

一方、本発明は、発明の好適な態様により、締固め要求高さＨｖは、法律により規定された高さに基づいて設定することができる。また、所定段数Ｎは、壁面部材Ｗｐの高さＨｗに基づいて設定することができる。さらに、背面層施工工程Ｓｎの終了後、壁面部材Ｗｐと所定段数Ｎの裏込材単段層部４間に中込コンクリートＣを打設することができる。他方、メッシュホルダ２は、線部材Ｅ…となる鉄筋材Ｅｒ…を溶接して構成することができるとともに、透水性シート材３には、不織布素材３ｒを用いることができる。   On the other hand, in the present invention, according to a preferred aspect of the present invention, the required compaction height Hv can be set based on a height prescribed by law. Further, the predetermined step number N can be set based on the height Hw of the wall member Wp. Furthermore, after the back layer construction process Sn is completed, the inlaid concrete C can be cast between the wall surface member Wp and the backing material single-stage layer portion 4 having the predetermined number N of stages. On the other hand, the mesh holder 2 can be formed by welding rebar materials Er to be the wire members E, and a non-woven fabric material 3r can be used for the water-permeable sheet material 3.

このような手法による本発明に係る擁壁の施工方法及び裏込層構築部材１０によれば、次のような顕著な効果を奏する。   According to the retaining wall construction method and the backing layer construction member 10 according to the present invention by such a method, the following remarkable effects are obtained.

（１） 裏込材Ｂの施工時には、裏込材単段層部４を、被施工面Ｇｆに沿って所定段数Ｎまで順次構築する背面層施工工程Ｓｎを含むため、裏込材Ｂに対する締固めを壁面部材Ｗｐから離間した位置において一定の高さ単位で行うことができる。したがって、裏込材Ｂを投入した後における作業機械による締固めも壁面部材Ｗｐ…の影響を受けることなく容易かつ確実に行うことができるとともに、裏込材単段層部４を被施工面Ｇｆに沿って所定段数Ｎまで階段状に構築するため、作業用足場等の作業スペースや仮設土留を容易に確保できる。この結果、施工全体の容易性及び作業性を高めることができ、作業能率及び作業効率の向上を図れるとともに、安全性の向上にも寄与できる。   (1) When the backing material B is applied, since the backing material single step layer portion 4 includes a back layer construction step Sn for sequentially building up to a predetermined number N of steps along the work surface Gf, the backing material B is tightened. The hardening can be performed at a fixed height unit at a position separated from the wall member Wp. Therefore, compaction by the working machine after the backing material B is loaded can be easily and reliably performed without being affected by the wall members Wp..., And the backing material single-stage layer portion 4 is formed on the work surface Gf. , A work space such as a work scaffold or a temporary retaining soil can be easily secured. As a result, easiness and workability of the entire construction can be improved, work efficiency and work efficiency can be improved, and safety can be improved.

（２） 基本的にはメッシュホルダ２及び透水性シート材３を用意すれば足りるため、施工に使用する部材点数を大幅に削減できる。したがって、擁壁１に対する施工コストを大幅に低減できるとともに、擁壁１全体の品質向上にも寄与できる。しかも、壁面部材Ｗｐ…がブロック状であるかパネル状であるかを問わずに適用できるとともに、緩やかな傾斜の被施工面Ｇｆであっても施工可能になるなど、適応性及び汎用的の高い工法として提供できる。   (2) Basically, it is sufficient to prepare the mesh holder 2 and the water-permeable sheet material 3, so that the number of members used for construction can be greatly reduced. Therefore, the construction cost for the retaining wall 1 can be significantly reduced, and the quality of the entire retaining wall 1 can be improved. Moreover, the present invention can be applied irrespective of whether the wall surface members Wp are block-shaped or panel-shaped, and can be constructed even on the work surface Gf having a gentle slope, and is highly adaptable and versatile. Can be provided as a construction method.

（３） 好適な態様により、締固め要求高さＨｖを、規定された高さに基づいて設定すれば、本実施形態に係る施工方法であっても、法律等に基づく規定を確実かつ容易に順守できる。即ち、通常、裏込材Ｂの段積施工における締固めの高さは、２０〜３０〔ｃｍ〕程度が適切であると規定されている。したがって、メッシュホルダ２の垂直面部２ｖの高さ（締固め要求高さ）Ｈｖを２０〜３０〔ｃｍ〕程度に選定すれば、計測等を行うことなく、規定された高さを確実かつ容易に順守することができる。   (3) According to a preferred aspect, if the required compaction height Hv is set based on the prescribed height, even the construction method according to the present embodiment can reliably and easily comply with the regulations based on laws and the like. I can comply. That is, normally, it is specified that the height of compaction in the step stacking of the backing material B is appropriately about 20 to 30 [cm]. Therefore, if the height (compression required height) Hv of the vertical surface portion 2v of the mesh holder 2 is selected to be about 20 to 30 [cm], the specified height can be reliably and easily achieved without performing measurement or the like. Can adhere to.

（４） 好適な態様により、所定段数Ｎを、壁面部材Ｗｐの高さＨｗに基づいて設定すれば、壁面部材Ｗｐの高さＨｗと裏込材単段層部４の高さをマッチングさせることができる。この結果、任意の背面層施工工程Ｓｎが終了した段階で、壁面部材Ｗｐと所定段数Ｎの裏込材単段層部４間に中込コンクリートＣを打設すれば、一段の壁面部材Ｗｐ…による擁壁部分を構築できる。しかも、中込コンクリートＣにより、次段における壁面部材Ｗｐ…を支持するアンカ筋等の設置が可能になるため、合理的な擁壁構造の構築及び施工を実現できる。   (4) According to a preferred embodiment, if the predetermined number of steps N is set based on the height Hw of the wall member Wp, the height Hw of the wall member Wp and the height of the backing material single-step layer portion 4 are matched. Can be. As a result, at the stage where the arbitrary back layer construction process Sn is completed, if the concrete C is poured between the wall member Wp and the backing material single-stage layer portion 4 having the predetermined number N, a single-stage wall member Wp. A retaining wall can be constructed. Moreover, since the intermediate concrete C enables installation of anchor bars or the like that support the wall members Wp... In the next stage, the construction and construction of a reasonable retaining wall structure can be realized.

（５） 好適な態様により、メッシュホルダ２を、線部材Ｅ…となる鉄筋材Ｅｒ…を溶接して構成すれば、必要数の鉄筋材Ｅｒ…を用意するのみで溶接により容易に製作することができる。この結果、製品として購入することなく、ハンドメイドにより安価に得ることができる。   (5) According to a preferred embodiment, if the mesh holder 2 is formed by welding the reinforcing members Er to be the wire members E, it can be easily manufactured by welding only by preparing the required number of reinforcing members Er. Can be. As a result, it can be obtained at low cost by handmade without purchasing as a product.

（６） 好適な態様により、透水性シート材３に、不織布素材３ｒを用いれば、市販されている透水防砂材等の汎用的な製品を利用できるため、更なる低コスト化に寄与できるとともに、柔軟素材によりメッシュホルダ２の形状や裏込材Ｂに馴染ませることができるため、施工作業の更なる容易化及び適切化に寄与できる。   (6) According to a preferred embodiment, if the non-woven fabric material 3r is used for the water-permeable sheet material 3, a general-purpose product such as a commercially available water-permeable and sand-proof material can be used, thereby contributing to further cost reduction. Since the flexible material can conform to the shape of the mesh holder 2 and the backing material B, it can contribute to further simplification and appropriateness of the construction work.

本発明の好適実施形態に係る擁壁の施工方法により施工した擁壁の一部を示す側面断面図、Side sectional view showing a part of the retaining wall constructed by the retaining wall construction method according to the preferred embodiment of the present invention, 同施工方法の施工手順を示すフローチャート、Flow chart showing the construction procedure of the construction method, 同施工方法の施工手順に対応する第一の施工状態から第三の施工状態を示す一部断面側面図、Partial cross-sectional side view showing the third construction state from the first construction state corresponding to the construction procedure of the construction method, 同施工手順に対応する第四の施工状態から第六の施工状態を示す一部断面側面図、Partial cross-sectional side view showing the sixth construction state from the fourth construction state corresponding to the construction procedure, 同施工手順に対応する第七の施工状態を示す一部断面側面図、Partial cross-sectional side view showing a seventh construction state corresponding to the construction procedure, 本発明の好適実施形態に係る裏込層構築部材におけるメッシュホルダと透水性シート材の一部を示す斜視図、Perspective view showing a part of the mesh holder and the water-permeable sheet material in the backing layer construction member according to a preferred embodiment of the present invention, 同裏込層構築部材におけるメッシュホルダの展開図、Development view of the mesh holder in the backing layer construction member, 同裏込層構築部材におけるメッシュホルダ及び補強鉄筋の側面図、Side view of a mesh holder and a reinforcing bar in the backing layer construction member, 同施工方法に用いる壁面部材の背面図、Rear view of the wall member used in the construction method, 同施工方法に用いる壁面部材を支持する支持鉄筋の取付説明図、Installation explanatory diagram of the support rebar supporting the wall member used in the construction method,

次に、本発明に係る好適実施形態を挙げ、図面に基づき詳細に説明する。   Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

まず、本実施形態に係る擁壁の施工方法に用いる裏込層構築部材１０及び壁面部材Ｗｐについて、図６〜図１０を参照して説明する。   First, the backing layer construction member 10 and the wall surface member Wp used in the retaining wall construction method according to the present embodiment will be described with reference to FIGS.

最初に、図６〜図８を参照して裏込層構築部材１０について説明する。裏込層構築部材１０は、図６に示すように、主要部材となるメッシュホルダ２と透水性シート材３の組合わせにより構成する。   First, the backing layer construction member 10 will be described with reference to FIGS. As shown in FIG. 6, the backing layer construction member 10 is constituted by a combination of a mesh holder 2 serving as a main member and a water-permeable sheet material 3.

メッシュホルダ２は、線部材Ｅ…を組合わせて全体を構成する。この場合、線部材Ｅ…には、鉄筋材Ｅｒ…を使用し、各鉄筋材Ｅｒ…を溶接することにより構成できる。このように、メッシュホルダ２を構成するに際し、線部材Ｅ…となる鉄筋材Ｅｒ…を溶接して構成すれば、必要数の鉄筋材Ｅｒ…を用意するのみで溶接により容易に製作することができる。この結果、製品として購入することなく、ハンドメイドにより安価に得ることができる利点がある。   The mesh holder 2 constitutes the whole by combining the wire members E. In this case, the reinforcing members Er can be used as the wire members E, and each of the reinforcing members Er can be welded. In this way, when the mesh holder 2 is formed by welding the reinforcing members Er to be the wire members E, the required number of reinforcing members Er can be easily prepared by welding only by preparing the required number of reinforcing members Er. it can. As a result, there is an advantage that it can be obtained at low cost by handmade without purchasing as a product.

図７は、メッシュホルダ２の展開図、即ち、メッシュホルダ２を製作する前段となる直線状の棒材となる鉄筋材Ｅｒ…を溶接した状態のアセンブリＡｍを示す。例示するアセンブリＡｍは、長い四本の鉄筋（横筋）Ｅｒｍ…と、短い十六本の鉄筋（横筋）Ｅｒｓ…を利用したものであり、横筋Ｅｒｍ…は横にして縦方向に所定間隔により配列させるとともに、縦筋Ｅｒｓ…は縦にして横方向に一定間隔置きに配列させ、直交した交差部を溶接により結合した。例示の場合、横筋Ｅｒｍは、径が４〔ｍｍ〕，長さが２０４０〔ｍｍ〕であり、縦筋Ｅｒｓ…は、径が４〔ｍｍ〕，長さが６４０〔ｍｍ〕である。   FIG. 7 is an exploded view of the mesh holder 2, that is, an assembly Am in a state where the reinforcing bars Er, which are linear bars, which are the pre-stages for manufacturing the mesh holder 2, are welded. The illustrated assembly Am uses four long rebars (transverse bars) Erm... And sixteen short rebars (transverse bars) Ers. The transverse bars Erm are arranged horizontally at predetermined intervals. Were arranged vertically at regular intervals in the horizontal direction, and the orthogonal intersections were joined by welding. In the illustrated example, the horizontal streak Erm has a diameter of 4 [mm] and a length of 2040 [mm], and the vertical streak Ers has a diameter of 4 [mm] and a length of 640 [mm].

そして、このアセンブリＡｍを折曲又は湾曲させることにより、図８に示すコの字状のメッシュホルダ２を得ることができる。図７中、Ｋ１，Ｋ２で示す位置が、それぞれ直角の折曲部（又は湾曲部）となる。これにより、メッシュホルダ２には、図８に示すように、折曲部Ｋ１を介して、裏込材Ｂに対する締固め要求高さＨｖに設定した垂直面部２ｖと所定長さＬｈに選定した水平面部２ｈを設けることができる。また、本実施形態では、折曲部Ｋ２を設けることにより、水平面部２ｈにおける折曲部Ｋ１の反対側の先端には、更に、水平面部２ｈに対して直角となる後垂直面部２ｖｒを設けている。   Then, by bending or bending the assembly Am, the U-shaped mesh holder 2 shown in FIG. 8 can be obtained. In FIG. 7, the positions indicated by K1 and K2 are right-angled bent portions (or curved portions). As a result, as shown in FIG. 8, the mesh holder 2 has, through the bent portion K1, a vertical surface portion 2v set to the required compaction height Hv for the backing material B and a horizontal surface selected to a predetermined length Lh. A surface portion 2h can be provided. Further, in the present embodiment, by providing the bent portion K2, a rear vertical surface portion 2vr that is perpendicular to the horizontal surface portion 2h is further provided at the front end of the horizontal surface portion 2h opposite to the bent portion K1. I have.

この場合、垂直面部２ｖの高さは、裏込材Ｂに対する締固め要求高さＨｖに設定する。この締固め要求高さＨｖは、法律や標準規格等により規定された高さに基づいて設定することが望ましい。このように、締固め要求高さＨｖを、規定された高さに基づいて設定すれば、本実施形態に係る施工方法であっても、法律等に基づく規定を確実に順守できる。即ち、通常、裏込材Ｂの段積施工における締固めの高さは、２０〜３０〔ｃｍ〕程度が適切であると規定されている。したがって、メッシュホルダ２の垂直面部２ｖの高さ（締固め要求高さ）Ｈｖを２０〜３０〔ｃｍ〕程度に選定すれば、計測等を行うことなく、規定された高さを確実かつ容易に順守することができる。   In this case, the height of the vertical surface portion 2v is set to the required compaction height Hv for the backing material B. It is desirable that the required compaction height Hv is set based on a height specified by a law, a standard, or the like. As described above, if the required compaction height Hv is set based on the prescribed height, even the construction method according to the present embodiment can reliably comply with the regulations based on laws and the like. That is, normally, it is specified that the height of compaction in the step stacking of the backing material B is appropriately about 20 to 30 [cm]. Therefore, if the height (compression required height) Hv of the vertical surface portion 2v of the mesh holder 2 is selected to be about 20 to 30 [cm], the specified height can be reliably and easily achieved without performing measurement or the like. Can adhere to.

また、水平面部２ｈの長さは、実際に施工する現場における被施工面Ｇｆ（図３（ａ）参照）の状態や被施工面Ｇｆの角度Ｒｍ等により任意となる所定長さＬｈに選定することができる。標準的な被施工面Ｇｆを考慮した場合、一例として、３００〔ｍｍ〕程度を選定できる。したがって、後垂直面部２ｖｒの高さＨｖｒは、例示の場合、１２０〔ｍｍ〕程度となる。   The length of the horizontal surface portion 2h is selected to be an arbitrary predetermined length Lh depending on the state of the work surface Gf (see FIG. 3A) at the actual work site and the angle Rm of the work surface Gf. be able to. When the standard work surface Gf is considered, for example, about 300 [mm] can be selected. Therefore, the height Hvr of the rear vertical surface portion 2vr is about 120 [mm] in the illustrated example.

図８中、１１は、両端にＵ形のフック部１１ｆ，１１ｆを湾曲形成した補強鉄筋であり、仮想線で示すように、メッシュホルダ２の垂直面部２ｖにおける横筋Ｅｒｍと後垂直面部２ｖｒにおける横筋Ｅｒｍ間に架け渡すことができ、これにより、垂直面部２ｖと後垂直面部２ｖｒに対する補強を行うことができる。   In FIG. 8, reference numeral 11 denotes a reinforcing reinforcing bar having U-shaped hook portions 11f, 11f formed at both ends in a curved manner, as indicated by phantom lines, a horizontal streak Erm in the vertical surface portion 2v of the mesh holder 2 and a horizontal streak in the rear vertical surface portion 2vr. It is possible to bridge between the Erm and Erm, thereby making it possible to reinforce the vertical surface portion 2v and the rear vertical surface portion 2vr.

一方、透水性シート材３は、メッシュホルダ２における裏込材Ｂを収容する収容面２ｉの一部又は全部に付設可能に形成する。透水性シート材３には、不織布素材３ｒを用いることができる。透水性シート材３として、このような不織布素材３ｒを用いれば、市販されている透水防砂材等の汎用的な製品を利用できるため、更なる低コスト化に寄与できるとともに、柔軟素材によりメッシュホルダ２の形状や裏込材Ｂに馴染ませることができるため、施工作業の更なる容易化及び適切化に寄与できる。   On the other hand, the water-permeable sheet material 3 is formed so as to be able to be attached to a part or the entirety of the accommodation surface 2i that accommodates the backing material B in the mesh holder 2. As the water-permeable sheet material 3, a nonwoven fabric material 3r can be used. If such a nonwoven fabric material 3r is used as the water-permeable sheet material 3, a general-purpose product such as a commercially available water-permeable and sandproof material can be used, which can contribute to further cost reduction and a mesh holder made of a flexible material. Since it can be adapted to the shape 2 and the backing material B, it can contribute to further simplification and appropriateness of the construction work.

例示の透水性シート材３には、厚さ４〔ｍｍ〕、幅４２０〔ｍｍ〕のロール状の透水防砂材を使用した。これにより、メッシュホルダ２に対する付設時には、メッシュホルダ２の長手方向（横方向）の長さに対してやや長くなる長さに切断したものを用いた。そして、図６及び図８に示すように、Ｌ状に折曲（又は湾曲）し、幅方向（前後方向）における水平方向長さＬｐｈを、水平面部２ｈの半分程度を覆う長さに選定するとともに、幅方向における垂直方向長さＬｐｖを、垂直面部２ｖの上端から上方へ所定長さ突出する長さに選定した。   A roll-shaped water-permeable and sand-proof material having a thickness of 4 mm and a width of 420 mm was used as the exemplified water-permeable sheet material 3. Thus, at the time of attachment to the mesh holder 2, a mesh holder 2 cut to a length slightly longer than the length in the longitudinal direction (lateral direction) was used. Then, as shown in FIGS. 6 and 8, the horizontal length Lph in the width direction (front-back direction) is bent (or curved) into an L shape, and is selected to be a length covering about half of the horizontal surface portion 2h. At the same time, the vertical length Lpv in the width direction was selected to be a length protruding upward by a predetermined length from the upper end of the vertical surface portion 2v.

次に、図９及び図１０を参照して壁面部材Ｗｐについて説明する。例示の壁面部材Ｗｐには、繊維強化セメント板２１を用いた。この繊維強化セメント板２１は、図９に示すように、所定の厚さを有する長方形をなし、裏面２１ｒには、三つのトラス筋２２…の一部を埋設して固定した。即ち、三つのトラス筋２２…は、繊維強化セメント板２１の裏面２１ｒにおける長手方向に配し、かつ一定間隔置きに配した。これにより、繊維強化セメント板２１の製造時に、三つのトラス筋２２…を一体に埋設することができる。   Next, the wall member Wp will be described with reference to FIGS. The fiber reinforced cement board 21 was used for the illustrated wall member Wp. As shown in FIG. 9, the fiber reinforced cement board 21 has a rectangular shape having a predetermined thickness, and a part of the three truss bars 22 is embedded and fixed to the back surface 21r. That is, the three truss bars 22 are arranged in the longitudinal direction on the back surface 21r of the fiber reinforced cement board 21 and are arranged at regular intervals. Thereby, at the time of manufacturing the fiber-reinforced cement board 21, the three truss bars 22 can be embedded integrally.

例示の繊維強化セメント板２１は、セメントに対して繊維と水を配合し、十分に混合させたものを、ウェットマシンを用いてスキ取りを行い、型板を用いてプレス成型した後、養生させたものである。また、トラス筋２２は、図１０に示すように、下端に配した一対のボトム筋部２２ｄ，２２ｄ、上端のトップ筋部２２ｕ、ボトム筋部２２ｄ，２２ｄとトップ筋部２２ｕ間に配する波形に形成した一対のラチス筋部２２ｒ，２２ｒを一体に結合したものであり、繊維強化セメント板２１の内部に、ラチス筋部２２ｒ，２２ｒの下部とボトム筋部２２ｄ，２２ｄが埋設される。   The exemplified fiber reinforced cement board 21 is prepared by blending fibers and water with cement and mixing them sufficiently, skimming using a wet machine, press-molding using a template, and curing. It is a thing. As shown in FIG. 10, the truss bars 22 have a pair of bottom streaks 22d, 22d disposed at the lower end, a top streak 22u at the upper end, and a waveform disposed between the bottom streaks 22d, 22d and the top streak 22u. A pair of lattice streaks 22r, 22r formed integrally with each other are integrally joined, and a lower portion of the lattice streaks 22r, 22r and bottom streaks 22d, 22d are embedded in the fiber reinforced cement board 21.

なお、図１０中、１２は、一端に鉄筋クランプ１２ｃを一体に有する支持鉄筋であり、鉄筋クランプ１２ｃの側面が支持鉄筋１２の一端側に溶接等により固定されている。この場合、鉄筋クランプ１２ｃはコの字状に折曲形成したものであり、図１０に示すように、トラス筋２２のトップ筋部２２ｕに掛止させた後、ボルト１２ｂを締め付ければ、鉄筋クランプ１２ｃ（支持鉄筋１２）をトップ筋部２２ｕに対して任意の角度で結合固定することができる。   In FIG. 10, reference numeral 12 denotes a supporting reinforcing bar having a reinforcing bar clamp 12c integrally at one end, and a side surface of the reinforcing bar clamp 12c is fixed to one end side of the supporting reinforcing bar 12 by welding or the like. In this case, the reinforcing bar clamp 12c is formed to be bent in a U-shape. As shown in FIG. 10, the reinforcing bar clamp 12c is hooked on the top bar 22u of the truss bar 22, and then the bolt 12b is tightened. The clamp 12c (supporting reinforcing bar 12) can be fixedly connected to the top bar 22u at an arbitrary angle.

次に、本実施形態に係る擁壁の施工方法について、図１及び図３〜図５、更には、図６〜図１０を参照しつつ図２に示すフローチャートに従って具体的に説明する。   Next, the construction method of the retaining wall according to the present embodiment will be specifically described according to the flowchart shown in FIG. 2 with reference to FIGS. 1 and 3 to 5, and further FIGS. 6 to 10.

まず、擁壁１の施工対象である地山Ｍの掘削を行う（ステップＳ１）。例示の場合、この地山Ｍには隣接して道路が設けられており、この擁壁１は道路用擁壁となる。図３（ａ）は掘削した地山Ｍを示しており、掘削した法面は、地面Ｇｅに対して所定角度Ｒｗで傾斜する被施工面Ｇｆとなる。   First, excavation of the ground M to be constructed of the retaining wall 1 is performed (step S1). In the illustrated example, a road is provided adjacent to the ground M, and the retaining wall 1 is a retaining wall for roads. FIG. 3A shows the excavated ground M, and the excavated slope becomes a work surface Gf inclined at a predetermined angle Rw with respect to the ground Ge.

ところで、被施工面Ｇｆの角度Ｒｗが地面Ｇｅに対して緩やかな（小さい）場合、従来の工法では、特に、裏込材の締固めを容易に行うことが困難となりやすい。即ち、裏込材はプレートコンパクターやタイピングランマー等の作業機械を用いて行うため、所定角度Ｒｗが小さい場合、壁面部材Ｗｐの角度Ｒｍも小さくなるため、壁面部材Ｗｐが作業の邪魔になる問題が存在した。しかし、本実施形態に係る施工方法では、前述した裏込層構築部材１０を利用することにより、裏込材に対する締固め施工を容易かつ確実に行うことができる。   By the way, when the angle Rw of the work surface Gf is gentle (small) with respect to the ground Ge, it is likely to be difficult to easily perform the compaction of the backing material by the conventional method. That is, since the backing material is performed by using a working machine such as a plate compactor or a typing rammer, when the predetermined angle Rw is small, the angle Rm of the wall member Wp is also small, so that the wall member Wp interferes with the work. Were present. However, in the construction method according to the present embodiment, the compaction construction for the backing material can be easily and reliably performed by using the backing layer construction member 10 described above.

そして、地山Ｍに対する掘削が終了したなら、被施工面Ｇｆに隣接した地面Ｇｅ上に、基礎コンクリート３０を打設する（ステップＳ２）。図３（ｂ）に、打設した基礎コンクリート３０を示す。この場合、基礎コンクリート３０の打設時には、一又は二以上（例示は二つ）の逆Ｖ形のアンカ筋３１，３１…を埋設固定し、基礎コンクリート３０の上面から上方へ突出させる。図３（ｂ）は、側面視のため、前後二つのアンカ筋３１，３１が現れるが、正面視となる左右方向には少なくとも二個所の位置に同様のアンカ筋３１，３１が設けられる。   When the excavation of the ground M is completed, the foundation concrete 30 is cast on the ground Ge adjacent to the work surface Gf (step S2). FIG. 3B shows the foundation concrete 30 that has been cast. In this case, at the time of placing the foundation concrete 30, one or more (two in illustration) inverted V-shaped anchor bars 31, 31... Are embedded and fixed, and are projected upward from the upper surface of the foundation concrete 30. In FIG. 3B, two front and rear anchor streaks 31 and 31 appear for a side view, but similar anchor streaks 31 and 31 are provided at at least two positions in the left-right direction as viewed from the front.

基礎コンクリート３０の施工が終了したなら、図３（ｃ）に示すように、基礎コンクリート３０と被施工面Ｇｆ間に砕石３２を充填して基礎コンクリート３０と被施工面Ｇｆ間の隙間を埋め、この砕石３２の上に、メッシュホルダ２の水平面部２ｈを設置する（ステップＳ３）。なお、メッシュホルダ２の垂直面部２ｖは、基礎コンクリート３０側に向けて設置する。   When the construction of the foundation concrete 30 is completed, as shown in FIG. 3C, the crushed stone 32 is filled between the foundation concrete 30 and the construction surface Gf to fill the gap between the foundation concrete 30 and the construction surface Gf. The horizontal surface 2h of the mesh holder 2 is set on the crushed stone 32 (Step S3). In addition, the vertical surface part 2v of the mesh holder 2 is installed toward the foundation concrete 30 side.

また、メッシュホルダ２の内面側（上面側）に、透水性シート材３を付設するとともに、補強鉄筋１１を付設する（ステップＳ４，Ｓ５）。この場合、補強鉄筋１１は、フック部１１ｆと１１ｆをメッシュホルダ２における垂直面部２ｖの横筋Ｅｒｍと後垂直面部２ｖｒの横筋Ｅｒｍ間に架け渡して取付ける。このため、透水性シート材３の一部に切込又は孔を空け、図８に示すように、一方のフック部１１ｆを、この切込又は孔に通して横筋Ｅｒｍに掛ければ、補強鉄筋１１の取付けと同時に透水性シート材３をメッシュホルダ２に固定することができる。なお、補強鉄筋１１…は、メッシュホルダ２の左右方向（長手方向）に対して複数位置に配設するが、目安として、概ね５０〔ｃｍ〕程度の間隔で配することが望ましい。したがって、例示の場合、一つのメッシュホルダ２に四本の補強鉄筋１１…が用いられ、透水性シート材３の四個所がメッシュホルダ２に固定される。   Further, the water-permeable sheet material 3 is provided on the inner surface side (upper surface side) of the mesh holder 2 and the reinforcing reinforcing bar 11 is provided (steps S4 and S5). In this case, the reinforcing reinforcing bar 11 is attached by bridging the hook portions 11f and 11f between the horizontal bar Erm of the vertical surface 2v and the horizontal bar Erm of the rear vertical surface 2vr in the mesh holder 2. For this reason, a cut or a hole is made in a part of the water-permeable sheet material 3 and, as shown in FIG. The water permeable sheet material 3 can be fixed to the mesh holder 2 at the same time as the mounting of the sheet. The reinforcing bars 11 are arranged at a plurality of positions in the left-right direction (longitudinal direction) of the mesh holder 2, but are preferably arranged at intervals of about 50 cm as a guide. Therefore, in the case of illustration, four reinforcing bars 11 are used for one mesh holder 2, and four portions of the water-permeable sheet material 3 are fixed to the mesh holder 2.

次いで、透水性シート材３を付設したメッシュホルダ２の内側（収容面２ｉ）に裏込材Ｂを収容する（ステップＳ６）。そして、必要量の裏込材Ｂを収容したならプレートコンパクターやタイピングランマー等の作業機械により裏込材Ｂの締固めを行う（ステップＳ７）。これにより、一つの単段層構築施工が終了し、図４（ｄ）に示す裏込材単段層部４が構築される。なお、締固めが終了した裏込材Ｂの上面前側には、上方に突出した透水性シート材３を被せることができるため、メッシュホルダ２の前方への無用な裏込材Ｂの落下を防止することができる。また、符号３３は、メッシュホルダ２の側面から裏込材Ｂが押し出されるのを防止する側板を示す。   Next, the backing material B is accommodated inside the mesh holder 2 provided with the water-permeable sheet material 3 (accommodating surface 2i) (Step S6). When the required amount of the backing material B is stored, the backing material B is compacted by a working machine such as a plate compactor or a typing rammer (step S7). As a result, one single-layer construction process is completed, and the backing material single-layer portion 4 shown in FIG. 4D is constructed. In addition, since the water-permeable sheet material 3 projecting upward can be placed on the front side of the upper surface of the backing material B that has been compacted, unnecessary dropping of the backing material B to the front of the mesh holder 2 is prevented. can do. Reference numeral 33 denotes a side plate for preventing the backing material B from being pushed out from the side surface of the mesh holder 2.

以降は、同様の裏込材単段層部４を構築する単段層構築施工を、被施工面Ｇｆに沿って順次行う（ステップＳ８，Ｓ３…）。即ち、構築した裏込材単段層部４における裏込材Ｂの上にメッシュホルダ２を設置し、透水性シート材３及び補強鉄筋１１を付設した後、裏込材Ｂを収容して締固めする単段層構築施工を行う。これにより、裏込材単段層部４…がいわば階段状に構築されるため、所定段数Ｎになるまで行う（ステップＳ８）。この状態を図４（ｅ）に示す。被施工面Ｇｆに沿って所定段数Ｎになるまで裏込材単段層部４…を順次構築する工程が背面層施工工程Ｓｎとなる。実施形態は、図４（ｅ）に示すように、所定段数Ｎを「５」に設定した場合を例示する。   Thereafter, a single-layer construction for constructing a similar backing material single-layer part 4 is sequentially performed along the work surface Gf (steps S8, S3,...). That is, the mesh holder 2 is installed on the backing material B in the constructed backing material single-stage layer portion 4, the water-permeable sheet material 3 and the reinforcing steel bar 11 are attached, and the backing material B is stored and tightened. Perform single-stage construction to harden. As a result, the backing material single-step layer portions 4 are constructed in a stepwise manner, so to speak, until the predetermined number N of steps is reached (step S8). This state is shown in FIG. The step of sequentially constructing the backing material single-stage layer portions 4... Until the predetermined number of steps N is reached along the construction surface Gf is the back layer construction step Sn. The embodiment exemplifies a case where the predetermined number of steps N is set to “5” as shown in FIG.

この場合、所定段数Ｎは、設置する壁面部材Ｗｐの高さＨｗに基づいて設定する。具体的には、図４（ｆ）に示すように、壁面部材Ｗｐの高さＨｗに対して一段程度高くなるように設定することが望ましい。このように、所定段数Ｎを設定するに際し、壁面部材Ｗｐの高さＨｗに基づいて設定すれば、壁面部材Ｗｐの高さＨｗと裏込材単段層部４の高さをマッチングさせることができる。したがって、任意の背面層施工工程Ｓｎが終了した段階で、後述する壁面部材Ｗｐと所定段数Ｎの裏込材単段層部４間に、中込コンクリートＣを打設可能になるため、一列目の壁面部材Ｗｐによる擁壁部分を構築できる。しかも、中込コンクリートＣにより、次段における壁面部材Ｗｐ…を支持するアンカ筋等の設置が可能になるため、合理的な擁壁構造の構築及び施工を実現できる。   In this case, the predetermined step number N is set based on the height Hw of the wall member Wp to be installed. Specifically, as shown in FIG. 4 (f), it is desirable to set the height to be about one step higher than the height Hw of the wall member Wp. As described above, when the predetermined number of steps N is set based on the height Hw of the wall member Wp, the height Hw of the wall member Wp and the height of the backing material single-step layer portion 4 can be matched. it can. Therefore, at the stage where the arbitrary back layer construction process Sn is completed, the inlaid concrete C can be cast between the wall member Wp, which will be described later, and the backing material single-stage layer portion 4 having the predetermined number N of stages. A retaining wall portion using the wall member Wp can be constructed. Moreover, since the intermediate concrete C enables installation of anchor bars or the like that support the wall members Wp... In the next stage, the construction and construction of a reasonable retaining wall structure can be realized.

そして、背面層施工工程Ｓｎが終了したなら、壁面部材Ｗｐを設置する施工を行う（ステップＳ９）。壁面部材Ｗｐには、図９に示した繊維強化セメント板２１を使用するため、図４（ｆ）に示すように、繊維強化セメント板２１を、基礎コンクリート３０の上面に設置し、所定角度Ｒｗとなるように、図示を省略した仮固定材等により仮固定した後、複数の支持鉄筋１２…を用いて繊維強化セメント板２１を設置固定する。図４（ｆ）における一点鎖線円Ｚｃ部の抽出拡大図を図１０に示す。同図に示すように、支持鉄筋１２の一端には、鉄筋クランプ１２ｃが溶接により固定されているため、この鉄筋クランプ１２ｃを繊維強化セメント板２１のトップ筋部２２ｕの所定位置に掛け、ボルト１２ｂを仮締めした後、支持鉄筋１２をの他端をアンカ筋３１に溶接する。これにより、支持鉄筋１２の他端を基礎コンクリート３０に対して固定するとともに、この後、鉄筋クランプ１２ｃのボルト１２ｂを締め付け、支持鉄筋１２の一端を繊維強化セメント板２１側に固定する。例示の場合、縦方向において、三本の支持鉄筋１２…を利用して結合するとともに、横方向においても、前述した左右方向に配設したアンカ筋３１，３１…毎に結合する。図４（ｆ）が壁面部材Ｗｐを設置した状態を示す。   Then, when the back layer construction step Sn is completed, construction for installing the wall member Wp is performed (step S9). Since the fiber reinforced cement board 21 shown in FIG. 9 is used for the wall member Wp, the fiber reinforced cement board 21 is installed on the upper surface of the foundation concrete 30 as shown in FIG. Is temporarily fixed by a temporary fixing material or the like (not shown), and then the fiber reinforced cement board 21 is installed and fixed using a plurality of supporting reinforcing bars 12. FIG. 10 is an enlarged enlarged view of the dashed-dotted circle Zc in FIG. As shown in the figure, a reinforcing bar clamp 12c is fixed to one end of the supporting reinforcing bar 12 by welding. , And the other end of the supporting reinforcing bar 12 is welded to the anchor bar 31. Thus, the other end of the supporting reinforcing bar 12 is fixed to the foundation concrete 30, and thereafter, the bolt 12 b of the reinforcing bar clamp 12 c is tightened, and one end of the supporting reinforcing bar 12 is fixed to the fiber reinforced cement board 21 side. In the illustrated example, the three supporting reinforcing bars 12 are connected in the vertical direction, and the anchor bars 31, 31... Arranged in the left-right direction are also connected in the horizontal direction. FIG. 4F shows a state where the wall member Wp is installed.

一方、壁面部材Ｗｐの設置施工が終了したなら、仮固定材等を取り除いた後、繊維強化セメント板２１と所定段数Ｎの裏込材単段層部４間に中込コンクリートＣを打設する（ステップＳ１０）。この際、中込コンクリートＣの上面には、基礎コンクリート３０の場合と同様にアンカ筋３１…の下部一部を埋設する。中込コンクリートＣを打設した後の状態を図５に示す。これにより、擁壁１における一列目における壁面部材Ｗｐの設置施工が終了する。なお、一列目における一つの壁面部材Ｗｐに対して説明したが、一列目における他の壁面部材Ｗｐ…も同様に施工することができ、これらの施工は同時に行ってもよいし、順次行ってもよい。そして、このような一列における壁面部材Ｗｐ…の設置施工は、下から順次繰り返して行う（ステップＳ１１，Ｓ３…）。即ち、下から、二列目、三列目…と順次行い、最終列（最上列）となる下からＭ列目まで終了すれば、擁壁１の建造が完了する（ステップＳ１１）。完成した擁壁１の一部を図１に示す。   On the other hand, when the installation work of the wall member Wp is completed, after removing the temporary fixing material and the like, the concrete inlay C is poured between the fiber-reinforced cement board 21 and the backing material single-stage layer portion 4 having a predetermined number N of steps ( Step S10). At this time, the lower part of the anchor streaks 31 is buried on the upper surface of the inset concrete C, as in the case of the foundation concrete 30. FIG. 5 shows a state after the concrete C is poured. Thus, the installation of the wall member Wp in the first row of the retaining wall 1 is completed. Although one wall member Wp in the first row has been described, other wall members Wp in the first row can be similarly constructed, and these constructions may be performed simultaneously or sequentially. Good. The installation of the wall members Wp... In such a row is sequentially and repeatedly performed from below (steps S11, S3...). That is, the second row, the third row, etc. are sequentially performed from the bottom, and when the processing is completed up to the Mth row from the bottom, which is the last row (uppermost row), the construction of the retaining wall 1 is completed (step S11). FIG. 1 shows a part of the completed retaining wall 1.

よって、このような本実施形態に係る裏込層構築部材１０及びこれを用いた擁壁の施工方法によれば、予め、線部材Ｅ…を組合わせることにより、折曲部Ｋ１，Ｋ２を介して裏込材Ｂに対する締固め要求高さＨｖに設定した垂直面部２ｖ及び所定長さＬｈに選定した水平面部２ｈ、更には後垂直面部２ｖｒを有してなるメッシュホルダ２，及びメッシュホルダ２に付設する透水性シート材３、即ち、裏込層構築部材１０を用意し、裏込材Ｂの施工時に、メッシュホルダ２を、裏込材Ｂを施工する領域Ｚｍ内に設置するとともに、メッシュホルダ２における裏込材Ｂを収容する収容面２ｉの一部に透水性シート材３を付設し、この透水性シート材３を含むメッシュホルダ２に、裏込材Ｂを収容するとともに、締固めを行うことにより、裏込材単段層部４を構築する単段層構築施工を、被施工面Ｇｆに沿って所定段数Ｎまで順次行う背面層施工工程Ｓｎを備えるため、裏込材Ｂの施工時には、裏込材単段層部４を、被施工面Ｇｆに沿って所定段数Ｎまで順次構築する背面層施工工程Ｓｎを含むため、裏込材Ｂに対する締固めを壁面部材Ｗｐから離間した位置において一定の高さ単位で行うことができる。したがって、裏込材Ｂを投入した後における作業機械による締固めも壁面部材Ｗｐ…の影響を受けることなく容易かつ確実に行うことができるとともに、裏込材単段層部４を被施工面Ｇｆに沿って所定段数Ｎまで階段状に構築するため、作業用足場等の作業スペースや仮設土留を容易に確保できる。この結果、施工全体の容易性及び作業性を高めることができ、作業能率及び作業効率の向上を図れるとともに、安全性の向上にも寄与できる。   Therefore, according to the backing layer construction member 10 and the retaining wall construction method using the same according to the present embodiment, by combining the wire members E in advance, via the bent portions K1 and K2. The mesh holder 2 and the mesh holder 2 having the vertical surface portion 2v set to the required compaction height Hv for the backing material B, the horizontal surface portion 2h selected for the predetermined length Lh, and the rear vertical surface portion 2vr. The permeable sheet material 3 to be attached, that is, the backing layer construction member 10 is prepared, and when the backing material B is applied, the mesh holder 2 is set in the area Zm where the backing material B is applied, The water-permeable sheet material 3 is attached to a part of the accommodation surface 2i for accommodating the backing material B in 2, and the backing material B is accommodated in the mesh holder 2 including the water-permeable sheet material 3 and compaction is performed. By doing it, backing material only In order to include the back layer construction step Sn in which the single layer construction for constructing the layer portion 4 is sequentially performed up to the predetermined number N of steps along the work surface Gf, when the backing material B is constructed, the backing material single-stage layer portion is provided. 4 includes a back layer construction step Sn for sequentially constructing up to a predetermined number N of steps along the work surface Gf, so that the backing material B is compacted at a fixed height unit at a position separated from the wall member Wp. Can be. Therefore, compaction by the working machine after the backing material B is loaded can be easily and reliably performed without being affected by the wall members Wp..., And the backing material single-stage layer portion 4 is formed on the work surface Gf. , A work space such as a work scaffold or a temporary retaining soil can be easily secured. As a result, easiness and workability of the entire construction can be improved, work efficiency and work efficiency can be improved, and safety can be improved.

また、基本的にはメッシュホルダ２及び透水性シート材３を用意すれば足りるため、施工に使用する部材点数を大幅に削減できる。したがって、擁壁１に対する施工コストを大幅に低減できるとともに、擁壁１全体の品質向上にも寄与できる。しかも、壁面部材Ｗｐ…がブロック状であるかパネル状であるかを問わずに適用できるとともに、緩やかな傾斜の被施工面Ｇｆであっても施工可能になるなど、適応性及び汎用的の高い工法として提供できる。   Basically, it is sufficient to prepare the mesh holder 2 and the water-permeable sheet material 3, so that the number of members used for construction can be greatly reduced. Therefore, the construction cost for the retaining wall 1 can be significantly reduced, and the quality of the entire retaining wall 1 can be improved. Moreover, the present invention can be applied irrespective of whether the wall surface members Wp are block-shaped or panel-shaped, and can be constructed even on the work surface Gf having a gentle slope, and is highly adaptable and versatile. Can be provided as a construction method.

以上、好適実施形態について詳細に説明したが、本発明は、このような実施形態に限定されるものではなく、細部の構成，形状，素材，数量，数値，手法，手順等において、本発明の要旨を逸脱しない範囲で、任意に変更，追加，削除することができる。   As described above, the preferred embodiment has been described in detail. However, the present invention is not limited to such an embodiment, and the detailed configuration, shape, material, quantity, numerical value, method, procedure, and the like of the present invention are not limited thereto. Any change, addition, or deletion can be made without departing from the gist.

例えば、メッシュホルダ２ｆは、側面視をコの字形になるように形成した場合を例示したが、後垂直面部２ｖｒを設けないＬ形に形成してもよい。また、透水性シート材３は、メッシュホルダ２における裏込材Ｂを収容する収容面２ｉの一部に付設した場合を示したが、全部に付設してもよい。さらに、透水性シート材３として、不織布素材３ｒを用いた場合を示したが、その他、透水防砂材等の透水性を有する各種シート材を利用することができるとともに、設置場所によっては、細目ネット等であってもよい。一方、締固め要求高さＨｖは、法律により規定された高さに基づいて設定することができるが、これに限定されるものではない。また、所定段数Ｎも、壁面部材Ｗｐの高さＨｗに基づいて設定することが望ましいが、これに限定されるものではない。さらに、メッシュホルダ２は、線部材Ｅ…となる鉄筋材Ｅｒ…を溶接して構成することができるが、他の構成を排除するものではない。他方、壁面部材Ｗｐとして、繊維強化セメント板２１を例示したが、コンクリートブロック等の各種壁面部材を適用できる。また、壁面部材Ｗｐを固定する方法として支持鉄筋１２を用いた場合を示したが、壁面部材Ｗｐの種類に応じた各種の固定方法を適用できる。したがって、支持鉄筋１２は鉄筋クランプ１２ｃを一体に有する形態を示したが、鉄筋クランプ１２ｃを用いることなく、支持鉄筋１２を、繊維強化セメント板２１におけるトラス筋２２に直接溶接等により固定することができる。なお、裏込層構築部材１０は、施工現場において、メッシュホルダ２を設置するとともに、このメッシュホルダ２に、透水性シート材３、更には、補強鉄筋１１を付設する場合を示したが、メッシュホルダ２に対して、工場等において、予め、透水性シート材３及び補強鉄筋１１を付設したユニットとなる裏込層構築部材１０を製作し、このユニットを施工現場に運んで設置してもよく、施工（製作）の順番は問わない。この際、メッシュホルダ２に対して、透水性シート材３の取付けは、別途用意した針金等の取付部材を用いてもよい。   For example, the case where the mesh holder 2f is formed so as to have a U-shape in side view is illustrated, but the mesh holder 2f may be formed in an L shape without the rear vertical surface portion 2vr. Further, although the case where the water-permeable sheet material 3 is provided on a part of the housing surface 2i for housing the backing material B in the mesh holder 2 is shown, it may be provided on the whole. Furthermore, although the case where the nonwoven fabric material 3r is used as the water permeable sheet material 3 is shown, other water permeable sheet materials such as a water permeable sandproof material can be used. And so on. On the other hand, the required compaction height Hv can be set based on the height prescribed by law, but is not limited to this. Further, it is desirable that the predetermined number of steps N is set based on the height Hw of the wall member Wp, but is not limited to this. Further, the mesh holder 2 can be formed by welding rebar materials Er to be the wire members E, but this does not exclude other configurations. On the other hand, the fiber reinforced cement board 21 is exemplified as the wall member Wp, but various wall members such as concrete blocks can be applied. Further, the case where the support rebar 12 is used as a method of fixing the wall member Wp has been described, but various fixing methods according to the type of the wall member Wp can be applied. Therefore, the supporting rebar 12 has the form in which the reinforcing bar clamp 12c is integrally provided, but the supporting rebar 12 can be fixed to the truss bar 22 of the fiber reinforced cement board 21 by directly welding or the like without using the reinforcing bar clamp 12c. it can. In addition, the backing layer construction member 10 shows the case where the mesh holder 2 is installed at the construction site and the permeable sheet material 3 and further the reinforcing reinforcing bar 11 are attached to the mesh holder 2. For the holder 2, a backing layer construction member 10 serving as a unit provided with the water-permeable sheet material 3 and the reinforcing bar 11 may be manufactured in advance in a factory or the like, and this unit may be carried to a construction site and installed. The order of construction (production) does not matter. At this time, the water permeable sheet material 3 may be attached to the mesh holder 2 using an attachment member such as a wire prepared separately.

本発明に係る擁壁の施工方法及び裏込層構築部材は、道路，護岸，宅地造成等の法面に対する各種擁壁を構築する際に利用することができる。   The method for constructing a retaining wall and the backing layer construction member according to the present invention can be used when constructing various retaining walls on a slope such as a road, a seawall, and a residential area.

１：擁壁，２：メッシュホルダ，２ｖ：垂直面部，２ｈ：水平面部，２ｉ：収容面，３：透水性シート材，３ｒ：不織布素材，４：裏込材単段層部，１０：裏込層構築部材，Ｇｅ：地面，Ｇｆ：被施工面，Ｒｍ：所定角度，Ｒｗ：所定角度，Ｗｐ…：壁面部材，Ｂ：裏込材，Ｃ：中込コンクリート，Ｅ…：線部材，Ｅｒ…：鉄筋材，Ｋ１：折曲部，Ｋ２：折曲部，Ｈｖ：締固め要求高さ，Ｈｗ：壁面部材の高さ，Ｌｈ：所定長さ，Ｚｍ：施工する領域，Ｎ：所定段数，Ｓｎ：背面層施工工程   1: retaining wall, 2: mesh holder, 2v: vertical surface portion, 2h: horizontal surface portion, 2i: accommodation surface, 3: water-permeable sheet material, 3r: nonwoven fabric material, 4: backing material single-stage layer portion, 10: back surface Embedded layer construction member, Ge: ground, Gf: work surface, Rm: predetermined angle, Rw: predetermined angle, Wp ...: wall member, B: backing material, C: intermediate concrete, E ...: wire member, Er ... : Reinforcing material, K1: bent part, K2: bent part, Hv: required compaction height, Hw: height of wall member, Lh: predetermined length, Zm: construction area, N: predetermined number of steps, Sn ： Back layer construction process

Claims (8)

地面に対して所定角度で傾斜した被施工面に対して、裏込材を施工するとともに、地面に対して所定角度で傾斜し、かつ縦方向及び／又は横方向に配列する一又は二以上の壁面部材を施工し、前記裏込材と前記壁面部材間に中込コンクリートを打設することにより擁壁を構築する擁壁の施工方法であって、予め、線部材を組合わせることにより、折曲部を介して裏込材に対する締固め要求高さに設定した垂直面部及び所定長さに選定した水平面部を少なくとも有してなるメッシュホルダ，及び前記メッシュホルダに付設する透水性シート材を用意し、前記裏込材の施工時に、前記メッシュホルダを、前記裏込材を施工する領域内に設置するとともに、前記メッシュホルダにおける裏込材を収容する収容面の一部又は全部に前記透水性シート材を付設し、この透水性シート材を含むメッシュホルダに、前記裏込材を収容するとともに、締固めを行うことにより、裏込材単段層部を構築する単段層構築施工を、前記被施工面に沿って所定段数まで順次行う背面層施工工程を少なくとも含ませてなることを特徴とする擁壁の施工方法。   A backing material is applied to the work surface inclined at a predetermined angle with respect to the ground, and one or two or more inclined at a predetermined angle with respect to the ground and arranged vertically and / or horizontally. A method for constructing a retaining wall by constructing a wall member and placing a concrete between the backing material and the wall member to form a retaining wall. A mesh holder having at least a vertical surface portion set to a height required for compaction of the backing material via a portion and a horizontal surface portion selected to a predetermined length, and a water-permeable sheet material attached to the mesh holder. At the time of applying the backing material, the mesh holder is installed in a region where the backing material is to be applied, and the water permeable sheet is provided on a part or all of the receiving surface of the mesh holder that accommodates the backing material. Lumber A single-stage layer construction process for constructing a single-stage layer portion of the backing material by accommodating and compacting the backing material in a mesh holder containing the water-permeable sheet material, A method for constructing a retaining wall, comprising at least a back layer construction step of sequentially performing a predetermined number of steps along a surface. 前記締固め要求高さは、法律により規定された高さに基づいて設定することを特徴とする請求項１記載の擁壁の施工方法。   The retaining wall construction method according to claim 1, wherein the required height for compaction is set based on a height prescribed by law. 前記所定段数は、前記壁面部材の高さに基づいて設定することを特徴とする請求項１記載の擁壁の施工方法。   The method according to claim 1, wherein the predetermined number of steps is set based on a height of the wall member. 前記背面層施工工程の終了後、前記壁面部材と所定段数の前記裏込材単段層部間に中込コンクリートを打設することを特徴とする請求項１又は３記載の擁壁の施工方法。   4. The method according to claim 1, wherein after the completion of the back layer construction step, inlaid concrete is poured between the wall member and a predetermined number of the backing material single-stage layer portions. 5. 地面に対して所定角度で傾斜した被施工面に対して裏込材を施工して擁壁を構築する際に用いる擁壁施工用裏込層構築部材であって、線部材を組合わせることにより、折曲部を介して裏込材に対する締固め要求高さに設定した垂直面部及び所定長さに選定した水平面部を少なくとも有してなるメッシュホルダ，及び前記メッシュホルダにおける裏込材を収容する収容面の一部又は全部に付設する透水性シート材を具備してなることを特徴とする裏込層構築部材。   A backing layer construction member for retaining wall construction used when constructing a retaining wall by constructing a backing material on a work surface inclined at a predetermined angle with respect to the ground, by combining a line member A mesh holder having at least a vertical surface portion set to a required height for compaction of the backing material via the bent portion and a horizontal surface portion selected to a predetermined length, and accommodating the backing material in the mesh holder. A backing layer construction member, comprising a water-permeable sheet material attached to a part or all of a storage surface. 前記締固め要求高さは、法律により規定された高さに基づいて設定することを特徴とする請求項５記載の裏込層構築部材。   The backing layer construction member according to claim 5, wherein the required compaction height is set based on a height prescribed by law. 前記メッシュホルダは、線部材となる鉄筋材を溶接して構成することを特徴とする請求項５記載の裏込層構築部材。   The backing layer construction member according to claim 5, wherein the mesh holder is formed by welding a reinforcing bar material serving as a wire member. 前記透水性シート材は、不織布素材を用いることを特徴とする請求項５記載の裏込層構築部材。   The backing layer construction member according to claim 5, wherein the water-permeable sheet material uses a nonwoven fabric material.
JP2018135571A 2018-07-19 2018-07-19 Retaining wall construction method and backing layer construction member Pending JP2020012310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018135571A JP2020012310A (en) 2018-07-19 2018-07-19 Retaining wall construction method and backing layer construction member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018135571A JP2020012310A (en) 2018-07-19 2018-07-19 Retaining wall construction method and backing layer construction member

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2022004009U Continuation JP3240785U (en) 2022-12-06 2022-12-06 retaining wall

Publications (1)

Publication Number Publication Date
JP2020012310A true JP2020012310A (en) 2020-01-23

Family

ID=69170402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018135571A Pending JP2020012310A (en) 2018-07-19 2018-07-19 Retaining wall construction method and backing layer construction member

Country Status (1)

Country Link
JP (1) JP2020012310A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7501868B2 (en) 2020-09-14 2024-06-18 松六コンクリート工業株式会社 Retaining wall construction method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076735A (en) * 1990-08-31 1991-12-31 Hilfiker William K Welded wire component gabions and method of making the same and construction soil reinforced retaining walls therefrom
JPH0874276A (en) * 1994-09-05 1996-03-19 Hirotoshi Masuda Construction method for surface of concrete building frame and concrete permanent form used in this method
JPH10317381A (en) * 1997-05-16 1998-12-02 Tenryu Ind Co Ltd Structure for protecting face of slope by retaining wall and method for constructing the same
JP2002105972A (en) * 2000-10-04 2002-04-10 Seijiro Suga Construction method and structure of retaining wall block in deformed retaining wall section
JP2002212966A (en) * 2001-01-17 2002-07-31 Shinkoo Corporation:Kk Construction method for earth retaining wall with landscape
JP3087675U (en) * 2002-02-01 2002-08-16 清孝 首藤 Supporting device for each layer of retaining wall and structure of retaining wall using it
JP2006090071A (en) * 2004-09-27 2006-04-06 Showa Kikai Shoji Kk Reinforced earth wall constructing instrument
JP2008115578A (en) * 2006-11-02 2008-05-22 Tokyo Printing Ink Mfg Co Ltd 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
JP2015151753A (en) * 2014-02-14 2015-08-24 大成建設株式会社 Construction method for leaning earth retaining wall

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076735A (en) * 1990-08-31 1991-12-31 Hilfiker William K Welded wire component gabions and method of making the same and construction soil reinforced retaining walls therefrom
JPH0874276A (en) * 1994-09-05 1996-03-19 Hirotoshi Masuda Construction method for surface of concrete building frame and concrete permanent form used in this method
JPH10317381A (en) * 1997-05-16 1998-12-02 Tenryu Ind Co Ltd Structure for protecting face of slope by retaining wall and method for constructing the same
JP2002105972A (en) * 2000-10-04 2002-04-10 Seijiro Suga Construction method and structure of retaining wall block in deformed retaining wall section
JP2002212966A (en) * 2001-01-17 2002-07-31 Shinkoo Corporation:Kk Construction method for earth retaining wall with landscape
JP3087675U (en) * 2002-02-01 2002-08-16 清孝 首藤 Supporting device for each layer of retaining wall and structure of retaining wall using it
JP2006090071A (en) * 2004-09-27 2006-04-06 Showa Kikai Shoji Kk Reinforced earth wall constructing instrument
JP2008115578A (en) * 2006-11-02 2008-05-22 Tokyo Printing Ink Mfg Co Ltd 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
JP2015151753A (en) * 2014-02-14 2015-08-24 大成建設株式会社 Construction method for leaning earth retaining wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7501868B2 (en) 2020-09-14 2024-06-18 松六コンクリート工業株式会社 Retaining wall construction method

Similar Documents

Publication Publication Date Title
KR100756680B1 (en) Wall using precast concrete building material and construction method therefor
KR102102919B1 (en) Retaining wall and construction method thereof
KR101000552B1 (en) Reinforced concrete and reinforced geosynthetic soil retaining wall, and construction method for thereof
JP2020012310A (en) Retaining wall construction method and backing layer construction member
JP6137394B1 (en) Anchor holder for low-rise buildings and foundation work
KR101287739B1 (en) Sheet pile combined modular bridge abutment and construction method of the same
JP5954835B2 (en) Retaining wall structure and retaining wall construction method
CN109024629B (en) Slope supporting method
JP3240785U (en) retaining wall
KR100889257B1 (en) Precast concrete facing panel using greening of retaining panel's front
NO165410B (en) PROCEDURE FOR BUILDING A FOUNDATION, AND THE FORCING UNIT FOR IMPLEMENTING THE PROCEDURE.
CN211547806U (en) Assembled ecological reinforced earth retaining wall and retaining wall panel thereof
KR102127859B1 (en) Pile wall, Construction method thereof
KR101183955B1 (en) Composite retaining wall construction method
KR100749930B1 (en) Restoration method of a destruction collapse using a sandbag and a reinforcing rod
JP3090642B2 (en) Construction method of foundation and foundation for wooden buildings, and structure of foundation and foundation for wooden buildings
KR101376225B1 (en) Retaining Wall Having Natural Rock And Construction Method Thereof
JP4332651B2 (en) Foundation reinforcement device and foundation construction method
KR102547643B1 (en) Constructing Method for Concrete Construction using Lightweight Molding Panel
JP6279892B2 (en) Form for wall construction and construction method of wall using the same
JP7501868B2 (en) Retaining wall construction method
JP6521413B1 (en) Frame structure and construction method of underground beam bottom
JPH0480432A (en) Water permeable temporary sheathing material and concrete wall construction method
JP5095355B2 (en) Wall block, reinforced earth wall structure, and method for constructing reinforced earth wall
JP6019462B1 (en) Slope construction method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210513

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220228

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220309

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220509

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20220907