JP2010112133A - Construction method of reinforced soil retaining wall - Google Patents
Construction method of reinforced soil retaining wall Download PDFInfo
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- JP2010112133A JP2010112133A JP2008288245A JP2008288245A JP2010112133A JP 2010112133 A JP2010112133 A JP 2010112133A JP 2008288245 A JP2008288245 A JP 2008288245A JP 2008288245 A JP2008288245 A JP 2008288245A JP 2010112133 A JP2010112133 A JP 2010112133A
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Abstract
Description
本発明は、道路擁壁、駐車場や工場等の敷地造成地の擁壁、土捨て場の擁壁、治山ダム、砂防ダムをはじめ多くの場所に適用される補強土擁壁の施工において、作業者の転落を防止し、安全に行うことのできる補強土擁壁の施工法に関する。 In the construction of a reinforced soil retaining wall applied to many places including road retaining walls, retaining walls of site preparation sites such as parking lots and factories, retaining walls of earth dumping sites, restoration mountains dams, sabo dams, The present invention relates to a method for constructing a reinforced earth retaining wall that can prevent a worker from falling and can be safely performed.
従来、道路擁壁、駐車場や工場等の敷地造成地の擁壁、土捨て場の擁壁、治山ダム、砂防ダム等に適用される補強土擁壁において、壁面材をエキスパンドメタル(網状の鋼製部材)を利用して施工する構成は知られている(特許文献1参照)。 Conventionally, the wall material is expanded metal (net-like) for road retaining walls, retaining walls for site preparation sites such as parking lots and factories, retaining walls for dumping grounds, reinforced soil retaining walls applied to forestry dams, sabo dams, etc. A construction using a steel member is known (see Patent Document 1).
さらに、盛土構造において、板状ブロックの壁面材を使用し、上下ブロックの間には継手金具及びスライド式ジョイントを設け、且つ補強土中に埋め込んだアンカー部材とスライド式ジョイントを連結する構成は公知である(特許文献2参照)。 Furthermore, in the embankment structure, a plate-shaped block wall surface material is used, a joint metal fitting and a sliding joint are provided between the upper and lower blocks, and the anchor member embedded in the reinforcing soil and the sliding joint are connected to each other. (See Patent Document 2).
従来技術にはそれぞれ次のような問題点がある。補強土擁壁の工事では、補強土擁壁の壁面側(谷側)に寄って壁面材の設置や締固め作業を行うことになるため、安全に、確実に作業が行えるように転落防止を図る必要がある。 Each of the conventional techniques has the following problems. In the construction of the reinforced soil retaining wall, wall surface material installation and compaction work will be performed near the wall side (valley side) of the reinforced soil retaining wall, thus preventing falling to ensure safe and reliable work. It is necessary to plan.
従来は、高所作業にもかかわらず、安全対策を施工業者の自主性に任せている関係から、十分な対策をせずに工事が行われているケースが多い。対策する場合も、下から単管パイプを繋げていって安全柵を構築していく方法がとられているため、工事完了後に撤去することが必要となる。しかも、多くの単管パイプが使われるのと、組立て及び撤去に手間がかかることから費用がかかり過ぎるといった問題があった。 Conventionally, in many cases, construction work has been carried out without taking sufficient countermeasures, because safety measures are left to the independence of the contractor in spite of work at high places. When taking countermeasures, it is necessary to connect the single pipe from the bottom and construct a safety fence, so it is necessary to remove it after the construction is completed. In addition, there are problems that many single pipes are used and that it takes too much time to assemble and remove, which is too expensive.
本発明は、上記従来の問題を解決することを目的とし、あらかじめ壁面材に安全柵を建て込むことができる安全柵支柱支持管を取付けておき、各段の盛土構造体の施工段階で安全柵が簡単に構築できる、補強土擁壁の施工法を実現するものである。 The present invention aims to solve the above-mentioned conventional problems, and a safety fence column support pipe that can be built in a wall is installed in advance, and the safety fence is installed at the construction stage of each embankment structure. Is a method to construct a reinforced earth retaining wall that can be easily constructed.
本発明は上記課題を解決するために、底面地盤上に盛土構造体を複数段積み重ねて補強土擁壁を形成する補強土擁壁の施工方法であって、上記複数段の盛土構造体のそれぞれは、底面地盤又は下位の段の盛土構造体上に、底面部、折り曲げ部及び前面起立部とから成るL型の壁面材を、その前面起立部を補強土擁壁の壁面側に向けて設置するとともに、該壁面材に連結して敷網材を敷設し、壁面材の前面起立部の内面に、安全柵支柱支持管を上下方向に向けて取り付け、壁面材と敷網材上に盛土を埋め込んで安全柵支柱支持管を盛土で固定してから、安全柵支柱支持管に転落防止用の安全柵の安全柵支柱を取り付け、さらに盛土を埋め込んで構築し、安全柵支柱支持管に取り付ける前記安全柵の安全柵支柱は、下位の段の盛土構造体の安全柵支柱支持管から抜き取った安全柵の安全柵支柱を取り付けるようにして、安全柵を下位から上位の段の盛土構造体の構築に際して順次、移し替えて取り付けることを特徴とする補強土擁壁の施工方法を提供する。 In order to solve the above problems, the present invention is a method for constructing a reinforcing earth retaining wall in which a plurality of embankment structures are stacked on a bottom ground to form a reinforcing earth retaining wall, each of the above-mentioned plurality of earthing structures. Installs an L-shaped wall material consisting of a bottom surface part, a bent part and a front standing part on the bottom ground or lower level embankment structure, with the front standing part facing the wall side of the reinforcing earth retaining wall At the same time, laying a laying net material connected to the wall surface material, attaching a safety fence column support pipe vertically to the inner surface of the front standing part of the wall surface material, and embedding the embankment on the wall surface material and the laying net material After embedding and fixing the safety fence support pipe with embankment, attach the safety fence support pillar of the safety fence for falling prevention to the safety fence support pipe, further embed the embankment, and attach it to the safety fence support pipe The safety fence post of the safety fence is the safety fence of the embankment structure of the lower level Construction of a reinforced earth retaining wall characterized by attaching a safety fence column of a safety fence extracted from a column support pipe and transferring the safety fence in order when constructing the embankment structure from the lower level to the upper level. Provide a method.
前記安全柵支柱支持管は、その上部を壁面材の前面起立部の内面に結束バンド又は番線で取り付けることが好ましい。 It is preferable to attach the upper part of the safety fence column support pipe to the inner surface of the front standing part of the wall material with a binding band or a wire.
前記安全柵は、前記安全柵支柱に対して、手すりを水平に交差して取り付けて形成することが好ましい。 Preferably, the safety fence is formed by attaching handrails to the safety fence column so as to cross horizontally.
以上のような本発明に係る補強土擁壁の施工法の構成によると、次のような効果が生じる。
(1)施工中の盛土構造体の補強土擁壁の壁面側(谷側)に安全柵を取り付けながら、各段の盛土構造体を順次構築していくので、作業員の転落防止となり、作業員は安心して作業ができ、特に、安心して盛土構造体の壁面側近辺における締め固め作業ができるから、従来生じていた締め固めの不足による補強土擁壁の壁面の変形や沈下の問題が解消可能となる。
According to the structure of the construction method of the reinforced earth retaining wall according to the present invention as described above, the following effects are produced.
(1) Reinforcement of the embankment structure under construction Since the safety structure is attached to the wall surface (valley side) of the retaining wall, the embankment structure at each stage is built in sequence, preventing workers from falling. Workers can work with peace of mind, and in particular, they can work with confidence in the vicinity of the wall surface of the embankment structure, eliminating the problem of deformation and settlement of the wall of the reinforced soil retaining wall due to lack of compaction. It becomes possible.
(2)下位の段の盛土構造体から上位の段の盛土構造体の構築において、同じ安全柵を順次付け替えながら取り付けていくので、使用する資材も最小で済み、撤去作業もなくなるので、安全性の向上だけでなく労力及びコストの縮減となる。これは、特に、資材搬入にコストのかかる山間僻地における施工作業については、きわめても効果的である。また、工事完了後は、最上段の安全柵をそのまま残し、転落防護柵として利用することもできる。 (2) In the construction of the upper level bank structure from the lower level bank structure, the same safety fences are installed while being replaced one after another, so the materials used are minimal and the removal work is eliminated. This will not only improve the cost, but also reduce labor and costs. This is particularly effective for construction work in mountainous areas where the cost of carrying materials is high. In addition, after the completion of the construction, the uppermost safety fence can be left as it is and used as a fall protection fence.
本発明に係る補強土擁壁の施工法を実施するための最良の形態を実施例に基づいて図面を参照して詳細に説明する。 The best mode for carrying out the method for constructing a reinforced soil retaining wall according to the present invention will be described in detail with reference to the drawings based on the embodiments.
本発明に係る補強土擁壁の施工法は、底面地盤上に盛土構造体を複数段積み重ねて補強土擁壁の施工する過程において、作業者が転落することなく安全に施工するための施工法である。 The construction method of the reinforced soil retaining wall according to the present invention is a construction method for constructing a reinforced soil retaining wall in a process in which a plurality of embankment structures are stacked on the bottom ground and the reinforced soil retaining wall is constructed without falling down. It is.
この補強土擁壁の施工法は、道路擁壁、駐車場や工場等の敷地造成地の擁壁、土捨て場の擁壁、治山ダム、砂防ダムをはじめ多くの場所の補強土擁壁の施工に適用可能であるが、ここでは、地山の傾斜面(のり面)の前面起立部の補強土擁壁の施工に適用した実施例で詳細に説明する。 The construction method of this reinforced soil retaining wall is that of the retaining wall of many places including road retaining walls, retaining walls of site preparation sites such as parking lots and factories, retaining walls of earth dumping sites, forest restoration dams, sabo dams. Although it is applicable to construction, here it demonstrates in detail in the Example applied to construction of the reinforced earth retaining wall of the front standing part of the inclined surface (slope surface) of a natural ground.
まず、本発明に係る補強土擁壁の施工法を適用する補強土擁壁の構成及びその施工法の概略を説明する。補強土擁壁1を施工する地山の傾斜面2は一定の傾斜角度で切り取られて背面切土が表出し、傾斜面2の裾部から前方に底面地盤4が形成されている。本発明の補強土擁壁1の施工法においては、底面地盤4上に盛土構造体3を順次、複数段積み重ねて補強土擁壁1を構築する。 First, the structure of the reinforced soil retaining wall to which the construction method of the reinforced soil retaining wall according to the present invention is applied and an outline of the construction method will be described. The slope 2 of the natural ground where the reinforced soil retaining wall 1 is constructed is cut off at a fixed slope angle to reveal the back cut, and the bottom ground 4 is formed forward from the bottom of the slope 2. In the construction method of the reinforced soil retaining wall 1 of the present invention, the reinforced soil retaining wall 1 is constructed by sequentially stacking the embankment structures 3 on the bottom ground 4.
本発明に係る補強土擁壁の施工法の適用される、複数段積み重ねる盛土構造体3は、それぞれ基本的にはほぼ共通する工程で構築するので、まず、その最下段の盛土構造体3の構築プロセスについて説明する。 The embankment structure 3 to be stacked in a plurality of stages, to which the method for constructing the reinforcing soil retaining wall according to the present invention is applied, is basically constructed in almost the same process. First, the bottom embankment structure 3 Describe the construction process.
底面地盤4における盛土構造体3の壁面側(地山の谷側)の端部(図1(a)の左側の位置に相当する前端部)上に、断面L型の壁面材5を設置する。この壁面材5は、図1(b)に示すように、底面部(水平部)6、折り曲げ部7及び前面起立部(起立部)8とから成る。底面部6は、底面地盤4上に置かれ、前面起立部8は、底面地盤4に対して、ほぼ垂直又は背面側(「地山の山側」、図1(a)中の右側)に向けて若干傾斜するように起立して形成されている。 A wall surface material 5 having an L-shaped cross section is installed on an end portion (a front end portion corresponding to the position on the left side of FIG. 1A) of the embankment structure 3 on the bottom ground 4 on the wall surface side (the valley side of the natural mountain). . As shown in FIG. 1B, the wall surface material 5 includes a bottom surface portion (horizontal portion) 6, a bent portion 7, and a front surface rising portion (standing portion) 8. The bottom surface portion 6 is placed on the bottom surface ground 4, and the front standing portion 8 is substantially perpendicular to the bottom surface ground 4 or toward the rear surface side (“mountain mountain side”, right side in FIG. 1 (a)). Are formed so as to be slightly inclined.
壁面材5は、剛性のあるエキスパンドメタルや金網等が利用されるが、本実施例では剛性のあるエキスパンドメタルを使用した例を示す。壁面材5の前面起立部8と底面部6との間に斜めタイ材5’が掛け渡され、壁面材5は補強されている。なお壁面材5は、補強土擁壁1の横幅に合わせて複数個、地山の横幅方向(地山を正面に見て横方向)に並置する。 As the wall material 5, a rigid expanded metal, a wire mesh, or the like is used. In this embodiment, an example in which a rigid expanded metal is used is shown. An oblique tie material 5 ′ is stretched between the front standing portion 8 and the bottom surface portion 6 of the wall surface material 5, and the wall surface material 5 is reinforced. A plurality of wall materials 5 are juxtaposed in the horizontal direction of the natural ground (in the horizontal direction when the natural mountain is seen from the front) according to the horizontal width of the reinforced earth retaining wall 1.
壁面材5の底面部6の山側端部に、敷網材9を鉄筋のような連結材10を、両者の網目に交互に挿入して互いに連結する。敷網材9は、底面地盤4から傾斜面2にかけて敷設されている。敷網材9は、ジオテキスタイル、例えばテンサー(商品名)等が利用される。 The connecting material 10 such as a reinforcing bar is inserted alternately into the meshes of the bottom surface 6 of the wall surface material 5 and the connecting material 10 such as reinforcing bars is connected to each other. The laying net material 9 is laid from the bottom ground 4 to the inclined surface 2. The floor netting 9 is made of a geotextile, such as a tensor (trade name).
壁面材5と、底面地盤4及び傾斜面2に敷設された敷網材9で囲まれた空間に盛土11を締め固めしながら埋め込み、1段目の盛土構造体3を構築する。この1段目の盛土構造体3の上に、2段目以上の盛土構造体3を次々と積み重ねて、補強土擁壁1を施工する。 A first-stage embankment structure 3 is constructed by embedding the embankment 11 while compacting the embankment 11 in a space surrounded by the wall surface material 5, the bottom ground 4, and the netting material 9 laid on the inclined surface 2. The reinforced soil retaining wall 1 is constructed by successively stacking the second and higher levels of the bank structure 3 on the first level of the bank structure 3.
2段目以上の盛土構造体3は、それぞれ1段目の盛土構造体3とほぼ同様のプロセスで構築する。即ち、下位の段の盛土構造体3上に配設した壁面材5を設置し、この壁面材5に敷網材9を連結し、これら壁面材5、下位の段の盛土構造体3上に敷設された敷網材9及び傾斜面2上に配設した敷網材9で囲まれた空間に盛土11を締め固めしながら埋め込む。 The second and higher levels of the embankment structure 3 are constructed by a process substantially similar to that of the first level of the embankment structure 3. That is, the wall material 5 disposed on the lower level banking structure 3 is installed, and the floor material 9 is connected to the wall material 5, and the wall material 5 is placed on the lower level banking structure 3. The embankment 11 is embedded while being compacted in a space surrounded by the laid netting material 9 and the laying net material 9 disposed on the inclined surface 2.
なお、下位の段の盛土構造体3上に水平に敷設した敷網材9の山側端部は、傾斜面2に敷設された敷網材9に、両者の網目に交互に鉄筋のような連結材12を挿入して連結される。 It should be noted that the mountain side end portion of the laying net material 9 laid horizontally on the lower level embankment structure 3 is connected to the laying net material 9 laid on the inclined surface 2 alternately like a reinforcing bar. The material 12 is inserted and connected.
以上のような補強土擁壁1を施工する方法において、本発明の補強土擁壁1の施工法の特徴は、以下のとおりである。各段の盛土構造体3の構築に際して、盛土11の埋め込みをする前に、その段の壁面材5の背面側に、安全柵支柱支持管13を取り付ける。そして、その段の盛土11を埋め込む際に、この安全柵支柱支持管13も同時に埋め込み、締め固めをする。各段の盛土構造体3の構築において埋め込んだ安全柵支柱支持管13は、補強土擁壁1の施工完了後も各段の盛土構造体3中に残置する。 In the method of constructing the reinforced soil retaining wall 1 as described above, the features of the construction method of the reinforced soil retaining wall 1 of the present invention are as follows. When constructing the embankment structure 3 at each stage, before embedding the embankment 11, the safety fence column support pipe 13 is attached to the back side of the wall material 5 at that stage. And when embedding the embankment 11 of the step, this safety fence support | pillar support pipe 13 is also embedded simultaneously, and it compacts. The safety fence column support pipe 13 embedded in the construction of the embankment structure 3 at each stage is left in the embankment structure 3 at each stage even after the construction of the reinforcing soil retaining wall 1 is completed.
このようにして、盛土を、ある程度の深さ(安全柵支柱支持管13が固定される程度の深さ)まで埋め込み締め固めてから、安全柵支柱支持管13に安全柵14を取り付けて、その段及び直上の段の盛土構造体3の構築作業中の作業者の転落防止等の安全を図れるようにする。 In this way, after embedding and embedding the embankment to a certain depth (depth to which the safety fence column support pipe 13 is fixed), the safety fence 14 is attached to the safety fence column support pipe 13, Safety such as prevention of falling of the worker during construction work of the embankment structure 3 of the step and the step immediately above is made possible.
このような特徴的な施工法を、さらに詳細に説明する。安全柵14の取り付けは、最下段の盛土構造体3を施工する際からでもよいが、作業に危険を伴うある程度の高さとなった段の盛土構造体3を施工する際からでよい。 Such a characteristic construction method will be described in more detail. The safety fence 14 may be attached from the time of constructing the lowermost embankment structure 3, but from the time of constructing the embankment structure 3 at a certain height that is dangerous for work.
図2は、2段目の盛土構造体3を施工する際から、安全柵14を取り付けるようにした例である。要するに、2段目の盛土11の埋め込みをする前に、その段の壁面材5の背面側(山側、図2(a)中右側)に、安全柵支柱支持管13を、盛土構造体3の横幅方向に間隔(例えば、2m間隔)をおいて取り付ける。 FIG. 2 is an example in which the safety fence 14 is attached when the second-stage embankment structure 3 is constructed. In short, before embedding the second-stage embankment 11, the safety fence column support pipe 13 is attached to the back surface side (mountain side, right side in FIG. 2A) of the wall material 5 at that stage. Attach at intervals (for example, 2 m intervals) in the width direction.
この安全柵支柱支持管13は、例えば、樹脂管又は鋼管等の中空パイプを利用し、その長さは、壁面材5の高さとほぼ同じ寸法とする。あるいは、壁面材5の高さより若干高い長さ寸法としてもよい。後者の場合は、その段を盛土11で完全に埋め込んでも、さらに盛土から若干上方に突出しているので、後述するが、安全柵支柱支持管13から安全柵支柱15を抜きやすくなる。 For example, a hollow pipe such as a resin pipe or a steel pipe is used as the safety fence column support pipe 13, and the length thereof is approximately the same as the height of the wall surface material 5. Alternatively, the length may be slightly higher than the height of the wall surface material 5. In the latter case, even if the step is completely buried with the embankment 11, it protrudes slightly upward from the embankment, so that the safety fence column 15 can be easily pulled out from the safety fence column support pipe 13 as described later.
安全柵支柱支持管13の壁面材5への取り付けは、図3に示すように、安全柵支柱支持管13の上部を結束バンド16又は番線で結束し、安全柵支柱支持管13の下端開口内に下方から位置決め用に支持ボルト17を挿入して取り付ける程度であり、仮止め程度の簡単な取り付けでよい。その理由は、その段に埋め込む盛土11によって、安全柵支柱支持管13はしっかりと土中に定着されるからである。 As shown in FIG. 3, the safety fence column support pipe 13 is attached to the wall surface material 5 by binding the upper part of the safety fence column support pipe 13 with a binding band 16 or a wire, and within the lower end opening of the safety fence column support pipe 13. The support bolt 17 is inserted and attached for positioning from below, and simple attachment such as temporary fixing may be used. The reason is that the safety fence column support pipe 13 is firmly fixed in the soil by the embankment 11 embedded in the step.
なお、支持ボルト17は、壁面材5の底面部6を通して上方に伸びるように下位の段の盛土構造体3上に載置したものであり、安全柵支柱支持管13を、その下端開口内に支持ボルト17が入るようにして位置決めする。 The support bolt 17 is placed on the lower level embankment structure 3 so as to extend upward through the bottom surface portion 6 of the wall surface material 5, and the safety fence column support tube 13 is placed in the lower end opening thereof. Position the support bolt 17 so that it is inserted.
安全柵支柱支持管13を壁面材5の背面側に取り付けてから、図2(a)に示すように、盛土を締め固めながら埋め込む。そして、安全柵支柱支持管13がしっかりと盛土11で固定される程度の深さ(例えば、その段の盛土構造体3のほぼ半分程度の深さ)まで盛土を締め固めながら埋め込んでから、安全柵支柱支持管13内に安全柵支柱15を挿入する。 After the safety fence column support tube 13 is attached to the back surface side of the wall surface material 5, as shown in FIG. Then, after filling the embankment to a depth that allows the safety fence column support tube 13 to be firmly fixed by the embankment 11 (for example, about half the depth of the embankment structure 3 at that stage), The safety fence column 15 is inserted into the fence column support tube 13.
この安全柵支柱15には、安全柵横材18を、盛土構造体3の前方から山側をみて横方向(横幅方向)に交差するように水平に取り付け、安全柵14を形成する。安全柵横材18(手すり)は、鋼管等を利用すればよいが、上下方向に、1列又は間隔をおいて2列以上取り付ける。本実施例では、図4に示すように、上下方向に安全柵横材18を2列取り付けた構成を示す。 A safety fence cross member 18 is horizontally attached to the safety fence column 15 so as to intersect in the horizontal direction (lateral width direction) when viewed from the front of the embankment structure 3 on the mountain side. The safety fence cross member 18 (handrail) may be a steel pipe or the like, but is attached in the vertical direction by one row or two or more rows at intervals. In this embodiment, as shown in FIG. 4, a configuration in which two rows of safety fence cross members 18 are attached in the vertical direction is shown.
図2(b)は、2段目の盛土構造体3に安全柵15を設置した状態で、2段目の盛土構造体3の構築を完了し、さらにその上位の段の3段目の盛土構造体において、同様に安全柵支柱支持管13を取り付けて盛土11を締め固めながら埋め込んでいく状態を示す。 FIG. 2 (b) shows that the construction of the second-stage embankment structure 3 is completed in a state where the safety fence 15 is installed on the second-stage embankment structure 3, and the third-stage embankment in the upper level. Similarly, in the structure, a state in which the safety fence column support pipe 13 is attached and the embankment 11 is embedded while being compacted is shown.
なお、一度、安全柵支柱15に、安全柵横材18を取り付けて安全柵14を形成すれば、図5の矢印に示すように、下位の段の盛土構造体3で使用したその安全柵14をまるごと安全柵支柱支持管13から引き抜いて、その上位の段の盛土構造体3に埋められた安全柵支柱支持管13に安全柵支柱15を挿入することで、順次移し替えて取り付ける。 Once the safety fence cross member 18 is attached to the safety fence column 15 to form the safety fence 14, the safety fence 14 used in the lower level embankment structure 3 as shown by the arrow in FIG. Are pulled out from the safety fence column support pipe 13 and inserted into the safety fence column support pipe 13 buried in the embankment structure 3 of the upper level, thereby being sequentially transferred and attached.
要するに、共通の安全柵14を、下位の盛土構造体3の構築作業から下位の盛土構造体3の構築作業に際して、順次、移し替えて取り付ける。従って、複数段の盛土構造体3に、それぞれ安全柵14を取り付ける必要はないので、横材18を各段毎に取り付けるような作業も資材も必要ない。この点が本発明の補強土擁壁の施工法のきわめてユニークな特徴である。なお、各段の盛土構造体3の構築において埋め込んだ安全柵支柱支持管13は、補強土擁壁1の施工完了後も各段の盛土構造体3中に残置する。 In short, the common safety fence 14 is sequentially transferred and attached from the construction work of the lower embankment structure 3 to the construction work of the lower embankment structure 3. Therefore, since it is not necessary to attach the safety fence 14 to the multi-level embankment structure 3, neither the work nor the material for attaching the cross member 18 to each step is necessary. This is a very unique feature of the construction method of the reinforced earth retaining wall of the present invention. In addition, the safety fence support | pillar support pipe 13 embedded in the construction of the embankment structure 3 of each step is left in the embankment structure 3 of each step even after the construction of the reinforcing soil retaining wall 1 is completed.
図6は、以上のようにして形成した転落防止用の安全柵14を示す図である。この図6は、ある段の盛土構造体3の施工にあたって、壁面材5に安全柵支柱支持管13を取り付けて、その段の途中まで盛土11を締め固めながら埋めてから安全柵支柱支持管13内に安全柵支柱15を挿入し、安全柵14を取り付けた状態を示す。 FIG. 6 is a diagram showing the safety fence 14 for preventing falling formed as described above. FIG. 6 shows that when a banking structure 3 of a certain level is constructed, a safety fence column support pipe 13 is attached to the wall surface material 5 and the bank 11 is filled while being compacted to the middle of the level, and then the safety fence column support pipe 13 is filled. The state which inserted the safety fence support | pillar 15 in the inside and attached the safety fence 14 is shown.
なお、図6中の右側一部に敷網材9が露出して見えるが、これは、盛土構造体3の構成をわかりやすく見えるための都合上であって、安全柵14を取り付けた状態では、すでに盛土11が盛り込まれているので、実際は、敷網材9は露出していない。 In addition, although the laying net material 9 appears to be exposed at a part on the right side in FIG. 6, this is for the sake of easy understanding of the configuration of the embankment structure 3, and in a state where the safety fence 14 is attached. Since the embankment 11 has already been incorporated, the netting material 9 is not actually exposed.
このように、施工中の盛土構造体3の補強土擁壁1の壁面側(谷側)に安全柵14を取り付けると、作業員の転落防止となり、作業員は安心して作業ができ、特に、安心して盛土構造体3の壁面側近辺における締め固め作業ができるから、従来生じていた締め固めの不足による補強土擁壁1の壁面の変形や沈下の問題が解消される。 Thus, when the safety fence 14 is attached to the wall surface side (valley side) of the reinforcing soil retaining wall 1 of the embankment structure 3 under construction, the worker can be prevented from falling, and the worker can work with peace of mind. Since the compaction work in the vicinity of the wall surface side of the embankment structure 3 can be performed with peace of mind, problems of deformation and settlement of the wall surface of the reinforced soil retaining wall 1 due to lack of compaction, which have occurred in the past, are solved.
さらに、本発明の補強土擁壁の施工法によると、使用する資材も最小で済み、各段の盛土構造体における安全柵14の解体、撤去作業もなくなるので、安全性の向上だけでなくコストの縮減も期待できる。また、工事完了後は、必要に応じて、最上段の安全柵14をそのまま残し、転落防護柵として利用することもできる。 Furthermore, according to the construction method of the reinforced soil retaining wall of the present invention, the amount of materials used is minimal, and the dismantling / removing work of the safety fence 14 in the embankment structure of each step is eliminated, so that not only the safety is improved but also the cost is reduced. Can be expected to be reduced. Further, after the construction is completed, the uppermost safety fence 14 can be left as it is and used as a fall protection fence if necessary.
以上、本発明に係る補強土擁壁の施工法の実施の形態を実施例に基づいて説明したが、本発明は特にこのような実施例に限定されることなく、特許請求の範囲記載の技術的事項の範囲内でいろいろな実施例があることはいうまでもない。 As mentioned above, although embodiment of the construction method of the reinforced earth retaining wall which concerns on this invention was described based on the Example, this invention is not specifically limited to such an Example, The technique as described in a claim It goes without saying that there are various embodiments within the scope of the subject matter.
本発明に係る補強土擁壁の施工法は、以上のとおりであり、道路擁壁、駐車場や工場等の敷地造成地の擁壁、土捨て場の擁壁、地山ダム、砂防ダムをはじめ多くの場所の補強土擁壁の施工に適用でき、作業者の転落を防止し、安全作業の確保にきわめて有用な施工法である。 The construction method of the reinforced soil retaining wall according to the present invention is as described above. The road retaining wall, the retaining wall of the site preparation site such as a parking lot or a factory, the retaining wall of the earth dumping site, the natural mountain dam, the sabo dam It can be applied to the construction of reinforced soil retaining walls in many places, and it is an extremely useful construction method to prevent the operator from falling and to ensure safe work.
1 補強土擁壁
2 地山の傾斜面
3 盛土構造体
4 底面地盤
5 壁面材
5’ 斜めタイ材
6 底面部(水平部)
7 折り曲げ部
8 前面起立部(起立部)
9 敷網材
10、12 連結材
11 盛土
13 安全柵支柱支持管
14 安全柵
15 安全柵支柱
16 結束バンド
17 支持ボルト
18 安全柵横材(手すり)
DESCRIPTION OF SYMBOLS 1 Reinforcement soil retaining wall 2 Inclined surface of natural ground 3 Embankment structure 4 Bottom ground 5 Wall material 5 'Diagonal tie material 6 Bottom part (horizontal part)
7 Bending part 8 Front standing part (standing part)
9 Laying net material 10, 12 Connecting material 11 Filling 13 Safety fence support pipe 14 Safety fence 15 Safety fence support 16 Tightening band 17 Support bolt 18 Safety fence side material (handrail)
Claims (3)
上記複数段の盛土構造体のそれぞれは、底面地盤又は下位の段の盛土構造体上に、底面部、折り曲げ部及び前面起立部とから成るL型の壁面材を、その前面起立部を補強土擁壁の壁面側に向けて設置するとともに、壁面材に連結して敷網材を敷設し、壁面材の前面起立部の内面に、安全柵支柱支持管を上下方向に向けて取り付け、壁面材と敷網材上に盛土を埋め込んで安全柵支柱支持管を盛土で固定してから、安全柵支柱支持管に転落防止用の安全柵の安全柵支柱を取り付け、さらに盛土を埋め込んで構築し、
安全柵支柱支持管に取り付ける前記安全柵の安全柵支柱は、下位の段の盛土構造体の安全柵支柱支持管から抜き取った安全柵の安全柵支柱を取り付けるようにして、安全柵を下位から上位の段の盛土構造体の構築に際して順次、移し替えて取り付けることを特徴とする補強土擁壁の施工方法。 A method of constructing a reinforced soil retaining wall that forms a reinforced soil retaining wall by stacking a plurality of embankment structures on the bottom ground,
Each of the multi-level embankment structure is composed of an L-shaped wall material comprising a bottom surface portion, a bent portion, and a front erection portion on the bottom ground or a lower level embankment structure, and the front erection portion is reinforced soil. Installed toward the wall surface side of the retaining wall, laying a laying net material connected to the wall surface material, and attaching the safety fence column support pipe vertically to the inner surface of the front standing part of the wall surface material. After embedding the embankment on the laying net material and fixing the safety fence column support pipe with the embankment, attach the safety fence column of the safety fence for fall prevention to the safety fence column support pipe, and further embed the embankment,
The safety fence post of the safety fence attached to the safety fence support pipe is attached to the safety fence support pillar extracted from the safety fence support pipe of the lower level embankment structure. A method for constructing a reinforced soil retaining wall, which is constructed by sequentially transferring and installing the embankment structure of the next step.
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JP2012077516A (en) * | 2010-10-01 | 2012-04-19 | Mitsubishi Plastics Inc | Fall prevention fence, earth retaining structure, and method for constructing earth retaining structure |
ITMO20110207A1 (en) * | 2011-08-10 | 2013-02-11 | Imitata | ANCHORAGE ELEMENT AND ITS SAFETY APPARATUS, PARTICULARLY FOR THE SAFETY OF OPERATORS DURING DETECTION. |
GB2557606A (en) * | 2016-12-09 | 2018-06-27 | M G F Trench Construction Systems Ltd | Edge protection system |
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JP2012077516A (en) * | 2010-10-01 | 2012-04-19 | Mitsubishi Plastics Inc | Fall prevention fence, earth retaining structure, and method for constructing earth retaining structure |
ITMO20110207A1 (en) * | 2011-08-10 | 2013-02-11 | Imitata | ANCHORAGE ELEMENT AND ITS SAFETY APPARATUS, PARTICULARLY FOR THE SAFETY OF OPERATORS DURING DETECTION. |
GB2557606A (en) * | 2016-12-09 | 2018-06-27 | M G F Trench Construction Systems Ltd | Edge protection system |
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