JP2015121049A - Inverted lining method - Google Patents

Inverted lining method Download PDF

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JP2015121049A
JP2015121049A JP2013265964A JP2013265964A JP2015121049A JP 2015121049 A JP2015121049 A JP 2015121049A JP 2013265964 A JP2013265964 A JP 2013265964A JP 2013265964 A JP2013265964 A JP 2013265964A JP 2015121049 A JP2015121049 A JP 2015121049A
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floor
construction
temporary
truss
stage
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JP6228836B2 (en
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寛之 桑本
Hiroyuki Kuwamoto
寛之 桑本
貴志 廻田
Takashi Megurida
貴志 廻田
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Taisei Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an inverted lining method capable of shortening a construction period, by efficiently constructing upper-lower underground floors.SOLUTION: The inverted lining method is provided for successively constructing a skeleton toward the underground floor from the aboveground floor. In the inverted lining method, the skeleton of the respective floors comprises at least a plurality of columns and a beam extended between the columns, and a construction method of the respective floors constructs a regular beam 1, and a plurality of temporary truss beams 5 are installed in an opening enclosed by the regular beams 1, and a temporary stage 6 is installed on the regular beam 1 and the truss beam 5, and regular construction of the floor is executed on the stage 6, and construction of the lower floor under the stage 6 is simultaneously executed, and the temporary truss beam 5 is a lightweight truss beam constituted by installing mutual members there, by carrying a heavy member that can be carried by manpower to a construction place.

Description

本発明は、地上階から地下階に向かって順次駆体を構築していく逆巻き工法に関するものである。   The present invention relates to a reverse winding method in which a main body is constructed sequentially from the ground floor to the basement floor.

地下構造物の構築方法には、土留め壁の内側に腹起しや切梁等からなる土留め支保工を施工して土留め壁で包囲された地盤を床付けまで掘削し、下方の床スラブから順に上方に地下構造物を構築していく、いわゆる順巻き工法や、土留め壁を施工し、上方から支保工の設置と掘削を繰り返しながら、地下構造物の天井スラブを先行して施工し、下方に向かって順に側壁と床スラブを施工する、いわゆる逆巻き工法などが知られている。   The construction method of the underground structure is to dig a ground support structure made up of erections, beams, etc. inside the retaining wall, excavate the ground surrounded by the retaining wall to the floor, The so-called forward-winding method that builds the underground structure upward from the slab and the retaining wall, and the installation and excavation of the support structure from the top are repeated in advance to construct the ceiling slab of the underground structure. And what is called a reverse winding method etc. which construct a side wall and a floor slab in order toward the downward direction are known.

上記する逆巻き工法では、床付けまで掘削をおこなって広範な施工空間を形成した後に地下構造物の構築をおこなうことから作業効率性に優れているというメリットがあり、この逆巻き工法に関する従来技術として、特許文献1,2などを挙げることができる。   In the reverse winding method described above, there is a merit that it is excellent in work efficiency because it constructs an underground structure after excavating to flooring and forming a wide construction space, as a conventional technology related to this reverse winding method, Patent documents 1 and 2 can be cited.

ところで、一般の建築構造物では各階に床スラブが存在するが、下水処理場や地下貯留池などの公共施設においては、地下階に梁や柱は存在するものの、床スラブが存在しない構造(もしくは床スラブが計画されていない構造で、各地下階が吹き抜け状態)が多く採用されている。   By the way, floor slabs exist on each floor in general building structures, but in public facilities such as sewage treatment plants and underground storage ponds, there are structures that do not have floor slabs, although there are beams and pillars on the underground floor. The floor slabs are not planned, and each basement is abbreviated).

このように地下階に床スラブのない構造物を逆巻き工法で施工する場合、地下階を地下1階、地下2階、・・・と各階を順番に完成させながら下階の施工、具体的には下階の掘削作業や本設構造物の構築作業を進めざるを得ない。たとえば、地下1階の梁のコンクリート打設をおこなって梁を完成させたとしても、柱や外壁、中壁などの構築が残ることから、これら全ての施工が完了するまでは下階の掘削に移行できない。   Thus, when constructing a structure without floor slabs on the basement floor using the reverse winding method, the construction of the lower floor is made while completing the basement floor, the first basement floor, the second basement floor, etc. in order. Has to proceed with the excavation work of the lower floor and the construction work of the main structure. For example, even if the beam is finished by placing concrete on the first floor of the basement, the construction of pillars, outer walls, and inner walls will remain. Cannot migrate.

そこで、各階の施工を完成させる前に下階の掘削に移行するべく、任意の地下階の本設梁が完成した段階で仮設のステージを設け、ステージ上で当該階の施工をおこなうとともに、ステージ下では下階の掘削等をおこなう方法が考えられる。   Therefore, in order to shift to the lower floor excavation before completing the construction on each floor, a temporary stage is provided when the main beam on any basement floor is completed, and the floor is constructed on the stage. Below, a method of excavating the lower floor is considered.

逆巻き工法にて駆体を構築する場合、地上階に設けられた開口の数とその大きさに関して制約を受けることが多く、たとえばクレーンを使用して開口直下にステージの土台となるH型鋼やI型鋼等の鋼材を吊り下ろすに当たり、鋼材をいわゆる横持ちする作業は人力では極めて困難である。   When constructing a fuselage by the reverse winding method, there are many restrictions on the number and size of the openings provided on the ground floor. For example, using a crane, the H-shaped steel or I used as the base of the stage directly under the opening When suspending steel materials such as mold steels, the so-called side-holding work of steel materials is extremely difficult by human power.

そこで、天井にホイストクレーンなどを設置する方策が考えられるが、この場合には鋼材の揚重作業に手間がかかることに加えて、天井の全ての領域にホイストクレーンを設置することは極めて困難であることから、各階に形成された梁で包囲された開口の全てにホイストクレーンによって鋼材を設置することは不可能となる。   Therefore, measures to install hoist cranes etc. on the ceiling can be considered, but in this case, it is extremely difficult to install hoist cranes in all areas of the ceiling in addition to the time and effort required to lift steel materials. For this reason, it is impossible to install steel materials by hoist cranes in all the openings surrounded by the beams formed on each floor.

また、ホイストクレーンを設置する方法では、施工の進歩状況に応じてホイストクレーンの盛り換え作業も必要になり、その作業に手間を要することに加えて、施工安全性の低下要因にもなる。   In addition, in the method of installing a hoist crane, the hoist crane needs to be replaced in accordance with the progress of the construction. In addition to the time and effort required for the work, the construction safety is also reduced.

また、梁で包囲された開口にH型鋼やI型鋼をステージの土台として設置した場合に、梁とこれらの鋼材の天端レベルが往々にして相違し得ることから、それらの天端レベルに段差が生じることが多い。そのため、これらの上にステージを構成する足場板やチェッカープレート等を敷き並べた際に、フラットなステージが製作できなかったり、安定したステージが製作できない可能性が高くなる。   Also, when H-shaped steel or I-shaped steel is installed as the base of the stage in the opening surrounded by the beams, the top level of the beams and these steel materials can often be different, so there is a difference in level between these top levels. Often occurs. Therefore, there is a high possibility that a flat stage cannot be manufactured or a stable stage cannot be manufactured when a scaffolding plate, a checker plate, or the like constituting the stage is laid on top of these.

特開2011−246910号公報JP 2011-246910 A 特開2012−211439号公報JP 2012-2111439 A

本発明は上記する問題に鑑みてなされたものであり、効率的に上下の地下階を施工することができ、もって工期短縮を図ることのできる逆巻き工法を提供することを目的としている。   The present invention has been made in view of the above-described problems, and an object thereof is to provide a reverse winding method capable of efficiently constructing upper and lower underground floors and thereby shortening the work period.

前記目的を達成すべく、本発明による逆巻き工法は、地上階から地下階に向かって順次駆体を構築していく逆巻き工法において、各階の駆体は、複数の柱と、柱間に架け渡された梁と、を少なくとも備えている逆巻き工法であって、各階の施工方法は、本設の梁を施工し、該本設の梁で囲まれた開口に複数の仮設のトラス梁を設置し、本設の梁とトラス梁の上に仮設のステージを設置し、ステージ上で当該階の本設施工をおこなうとともに、ステージ下の下階の施工を同時におこなうものであり、前記仮設のトラス梁は、人力にて搬送可能な重量の部材を施工場所に搬送し、そこで部材同士が組み付けられて構成される軽量のトラス梁である。   In order to achieve the above object, the reverse winding method according to the present invention is a reverse winding method in which the main body is constructed in order from the ground floor to the basement floor, and the main body on each floor has a plurality of columns and spans between the columns. Each of the floors is constructed by constructing a main beam and installing a plurality of temporary truss beams in an opening surrounded by the main beam. A temporary stage is installed on the main beam and the truss beam, and the main floor is installed on the stage and the lower floor is simultaneously installed on the lower floor. Is a lightweight truss beam that is configured by transporting a member having a weight that can be transported by human power to a construction site and assembling the members there.

本発明の逆巻き工法は、本設の梁で囲まれた開口に複数の仮設のトラス梁を設置し、本設の梁とトラス梁の上に仮設のステージを設置し、ステージの上で当該階の施工(柱や外壁等の施工)をおこない、ステージの下で下階の施工(掘削等)を同時におこなうものである。そして、ここで使用する仮設のトラス梁として、人力にて搬送可能な重量の部材を施工場所に搬送し、そこで部材同士が組み付けられて構成される軽量のトラス梁を適用することをその特徴とするものである。   In the reverse winding method of the present invention, a plurality of temporary truss beams are installed in an opening surrounded by the main beam, a temporary stage is installed on the main beam and the truss beam, and the floor is placed on the stage. Construction (construction of pillars, outer walls, etc.), and construction of the lower floor (excavation etc.) at the same time under the stage. And as a temporary truss beam used here, the weight of truss beam that can be transported by human power is transported to the construction place, and the lightweight truss beam constructed by assembling the members there is applied. To do.

このように人力にて部材が現場へ搬送可能であることから、ホイストクレーンの設置や盛り換えは不要であり、梁で包囲された開口の寸法等に左右されることなく、部材の搬送を実行することができる。すなわち、本明細書における「軽量のトラス梁」とは、少なくとも搬送の際に軽量であって人力搬送が可能であり、現場にて組み付けられてできるトラス梁のことを意味しており、最終的に形成されたトラス梁自体が軽量であるものを包含する意味である。   Since the members can be transported to the site by human power in this way, it is not necessary to install or replace the hoist crane, and the members can be transported without being affected by the dimensions of the opening surrounded by the beams. can do. That is, the term “lightweight truss beam” in this specification means a truss beam that is at least lightweight and can be transported manually and can be assembled at the site. This means that the truss beam itself formed in (1) is lightweight.

このような軽量のトラス梁の一例として、ペコビーム(登録商標 日鐵住金建材株式会社)や、トラス梁の両端に把持具を備えた軽量ビームなどを挙げることができる。   As an example of such a light truss beam, there can be mentioned Peco Beam (registered trademark, Nippon Steel & Sumikin Building Materials Co., Ltd.), a light beam having grips at both ends of the truss beam, and the like.

ペコビームは、鋼材をトラス状に組んだ外ビームと、長尺の鋼板に軽量化を図るべく複数の開口を開設した内ビームとから構成されるものであり、長さによって重量は相違するものの、外ビーム、内ビームともに、長さ1.5m〜3m程度で15kg〜25kgであり、人力にて十分に搬送可能である。   Peko beam is composed of an outer beam made of steel in a truss shape and an inner beam with a plurality of openings to reduce the weight of a long steel plate, although the weight varies depending on the length, Both the outer beam and inner beam are about 1.5 to 3m in length and 15kg to 25kg, and can be fully transported by human power.

また、両端に把持具を具備する軽量ビームは、長さ3m程度で20kg程度であり、こちらも人力にて十分に搬送可能である。   In addition, a lightweight beam with gripping tools at both ends is about 3kg in length and about 20kg, which can also be transported sufficiently by human power.

なお、ペコビーム等を仮設のトラス梁として使用する場合は、本設の梁に予め取り付け金具を取り付けておき、取り付け金具にペコビーム等からなる仮設のトラス梁を固定する。   When a peco beam or the like is used as a temporary truss beam, a mounting bracket is attached to the main beam in advance, and the temporary truss beam made of peco beam or the like is fixed to the mounting bracket.

一方、両端に把持具を具備する軽量ビームを仮設のトラス梁として使用する場合は、仮設のトラス梁を本設の梁に設置した際に把持具によって本設の梁への固定が同時におこなわれることになる。   On the other hand, when a light beam having grips at both ends is used as a temporary truss beam, when the temporary truss beam is installed on the permanent beam, the gripping tool is simultaneously fixed to the permanent beam. It will be.

なお、本設の梁と仮設のトラス梁のそれぞれの天端レベルが同一もしくは略同一となるように、仮設のトラス梁を本設の梁に設置するのがステージの平坦性および安定性の確保の観点から望ましい。この点、本発明の逆巻き工法では、本設の梁に仮設のトラス梁を取り付ける取り付け金具や把持具が双方のレベルを同一もしくは略同一に保つように機能することから、地下階において、その全面がほぼフラットな作業ステージを構成することが可能となる。   In order to ensure the flatness and stability of the stage, the temporary truss beam is installed on the main beam so that the top level of the main beam and the temporary truss beam are the same or substantially the same. From the viewpoint of. In this respect, in the reverse winding method of the present invention, the mounting bracket and the holding tool for attaching the temporary truss beam to the main beam function so as to keep both levels the same or substantially the same. However, it is possible to construct a substantially flat work stage.

ステージは、鋼製の足場板等を使用して製作される。たとえば4つの本設の梁で囲まれた平面視矩形の開口の対向する一組の梁間に、間隔を置いて複数の仮設のトラス梁を設置する。そして、鋼製の足場板をその長手方向がトラス梁と直交するように敷き並べて番線等で固定することにより、軽量トラス梁の上に軽量の作業ステージが完成する。   The stage is manufactured using a steel scaffolding plate or the like. For example, a plurality of temporary truss beams are installed at intervals between a pair of opposed beams of rectangular openings in plan view surrounded by four main beams. Then, by placing the steel scaffolding plates so that the longitudinal direction thereof is perpendicular to the truss beam and fixing them with a wire or the like, a lightweight work stage is completed on the lightweight truss beam.

作業ステージ上での当該階の本設施工、具体的には柱のコンクリート打設や外壁のコンクリート打設およびそれらの養生と、作業ステージの下階の掘削作業と本設梁の施工を同時に実行し、それらの施工が完了したら、作業ステージを解体し、仮設のトラス梁を解体し、下階へ搬送して同様の手順にて下階以深の施工が進められる。なお、この解体や搬送においても、ステージ構成部材と仮設のトラス梁の構成部材がともに軽量であり、人力搬送が可能であることから良好な作業性が保証される。   Performing permanent construction of the floor on the work stage, specifically concrete casting of pillars and concrete of the outer wall and their curing, excavation work on the lower floor of the work stage and construction of the main beam at the same time When these constructions are completed, the work stage is dismantled, the temporary truss beam is dismantled, transported to the lower floor, and the lower floor and deeper are advanced in the same procedure. Even in this dismantling and transporting, both the stage structural member and the temporary truss beam structural member are lightweight and can be transported manually, so that good workability is ensured.

以上の説明から理解できるように、本発明の逆巻き工法によれば、本設の梁で囲まれた開口に複数の仮設のトラス梁を設置し、本設の梁とトラス梁の上に仮設のステージを設置し、ステージの上で当該階の施工をおこない、ステージの下で下階の施工を同時におこなうものにおいて、使用する仮設のトラス梁として、人力にて搬送可能な重量の部材を施工場所に搬送し、そこで部材同士が組み付けられて構成される軽量のトラス梁を適用することにより、ホイストクレーンの設置や盛り換えを不要にでき、梁で包囲された開口の寸法等に左右されることなく、効率的に上下の地下階を施工することが可能となり、施工性に優れ、工期短縮を図ることができるものである。   As can be understood from the above description, according to the reverse winding method of the present invention, a plurality of temporary truss beams are installed in the opening surrounded by the main beams, and the temporary beams are installed on the main beams and the truss beams. Install a stage, perform construction on the floor above the stage, and simultaneously perform construction on the lower floor below the stage. It is possible to eliminate the need for hoist crane installation and replacement by applying a lightweight truss beam constructed by assembling members to each other, and depending on the dimensions of the opening surrounded by the beam. Therefore, it is possible to construct the upper and lower basement floors efficiently, and the workability is excellent and the construction period can be shortened.

本発明の逆巻き工法を説明した図である。It is a figure explaining the reverse winding method of this invention. 図1に続き、逆巻き工法を説明した図である。FIG. 2 is a diagram for explaining the reverse winding method following FIG. 1. 仮設のトラス梁の実施の形態1を説明した図である。It is a figure explaining Embodiment 1 of a temporary truss beam. 図2に続き、逆巻き工法を説明した図である。FIG. 3 is a diagram for explaining the reverse winding method following FIG. 2. 図4に続き、逆巻き工法を説明した図である。FIG. 5 is a diagram for explaining the reverse winding method following FIG. 4. 図5に続き、逆巻き工法を説明した図である。FIG. 6 is a diagram for explaining the reverse winding method following FIG. 5. 仮設のトラス梁の実施の形態2を説明した図である。It is the figure explaining Embodiment 2 of the temporary truss beam.

以下、図面を参照して本発明の逆巻き工法を説明する。   Hereinafter, the reverse winding method of the present invention will be described with reference to the drawings.

(逆巻き工法の実施の形態)
図1,2,4,5,6はその順に、本発明の逆巻き工法を説明した図である。
図示を省略するが、逆巻き工法による地下階の駆体構築に際し、まず、施工ヤードにおいて原地盤内にたとえば平面視矩形の土留め壁を専用の掘削機を使用して施工する。ここで、土留め壁の形態は、土質性状や地下水位、地下構造物の床付け深度や工費、工期などによって適宜選定されるものであるが、地中連続壁や柱列式連続壁、鋼矢板や親杭横矢板、鋼管矢板などのいずれであってもよい。土留め壁を原地盤内で対向する位置に施工したら、必要に応じてその根入れ領域に地盤改良体を造成用重機を使用して施工し、地下水の回り込みや盤膨れ等を抑制したり、土留め壁の受働土圧を高める等の措置を講じる。さらに、平面視矩形状の土留め壁で包囲された地盤内の地下水を揚水し、バックホーを使用して地盤の掘削を進める。このように土留め壁の施工が完了し、地表から深度1〜2m程度掘削が進行した段階で、1段目の支保工である腹起しを対向する土留め壁の双方に設置し、この対向する腹起し間に切梁を掛け渡す。1段目の切梁の施工が完了したら、バケット式の掘削機やバックホーなどを使用してさらに地盤の掘削を進め、所定深度までの掘削が完了した段階で、たとえば2段目の切梁、3段目の切梁を掘削地盤面に吊り降ろしておく。そして、既に設置済みの1段目の切梁の下方位置に地下構造物の天井スラブもしくは地上から地下へ通じる構造物の1階スラブとこれと連続するようにして側壁の一部を施工する。
(Embodiment of reverse winding method)
1, 2, 4, 5 and 6 are diagrams illustrating the reverse winding method of the present invention in that order.
Although illustration is omitted, when constructing the basement of the underground floor by the reverse winding method, first, for example, a rectangular retaining wall having a rectangular shape in plan view is constructed in the construction ground using a dedicated excavator. Here, the form of the retaining wall is appropriately selected according to the soil properties, groundwater level, flooring depth of underground structure, construction cost, construction period, etc., but the underground continuous wall, columnar continuous wall, steel Any of a sheet pile, a main pile sheet pile, a steel pipe sheet pile, etc. may be sufficient. After constructing the earth retaining wall in the opposite position in the original ground, if necessary, construct a ground improvement body in the rooting area using a heavy machine for creation, to suppress the wraparound of the groundwater and the swelling of the ground, Take measures such as increasing the passive earth pressure of the retaining wall. Furthermore, the groundwater in the ground surrounded by a rectangular retaining wall in plan view is pumped up, and the ground is excavated using a backhoe. In this way, when the construction of the retaining wall is completed and the excavation has progressed about 1 to 2 m from the surface, the uplifting that is the first stage of support is installed on both opposing retaining walls. A cut beam is placed between the opposite erections. When the construction of the first stage beam is completed, the excavation of the ground is further advanced using a bucket excavator or a backhoe, and when the excavation to a predetermined depth is completed, for example, the second stage beam, The third stage beam is suspended from the excavated ground. Then, a part of the side wall is constructed so as to be continuous with the ceiling slab of the underground structure or the first floor slab of the structure that leads from the ground to the basement below the already installed first stage beam.

次に、逆巻き工法による地下1階以深の駆体の施工を図面を参照して説明する。
図1で示す地下階を地下1階とする。地下1階の不図示の本設の梁用の鉄筋、柱用の鉄筋3、不図示の外壁用の鉄筋を配筋した後、まず、先行して、本設の梁用の鉄筋周りに型枠を組み、コンクリートを打設し、硬化を待って本設の梁1を施工する。なお、図示例の梁1は、4つの梁1により、平面視が略矩形の開口2が形成されている。
Next, the construction of the body below the first floor underground by the reverse winding method will be described with reference to the drawings.
The basement floor shown in FIG. After arranging the reinforcing bar for the main beam (not shown) on the first basement floor, the reinforcing bar 3 for the column, and the reinforcing bar for the outer wall (not shown), first, around the reinforcing bar for the main beam The frame is assembled, concrete is cast, and the main beam 1 is constructed after curing. In the illustrated beam 1, the four beams 1 form an opening 2 having a substantially rectangular shape in plan view.

次に、図2で示すように、本設の梁1の開口エッジにおいて仮設のトラス梁を固定するための取り付け金具4(図示例は平鋼製の金具)を固定する。   Next, as shown in FIG. 2, a mounting bracket 4 (in the illustrated example, a flat steel bracket) for fixing the temporary truss beam is fixed at the opening edge of the main beam 1.

この取り付け金具4を介して、開口2内に仮設のトラス梁を設置する。ここで、図3は、仮設のトラス梁5の実施の形態1を示したものである。   A temporary truss beam is installed in the opening 2 via the mounting bracket 4. Here, FIG. 3 shows the first embodiment of the temporary truss beam 5.

このトラス梁5はペコビーム(登録商標 日鐵住金建材株式会社)であり、内ビーム51と外ビーム52から構成されている。   The truss beam 5 is Peco Beam (registered trademark, Nippon Steel & Sumikin Building Materials Co., Ltd.), and includes an inner beam 51 and an outer beam 52.

現場への搬送は、内ビーム51、外ビーム52を個別に搬送し、現場にて組み付けがおこなわれる。内ビーム51、外ビーム52ともに、長さ1.5m〜3m程度で15kg〜25kgと軽量であり、人力にて十分に搬送可能であることから作業性がよい。また、このように軽量な部材ゆえに、重量のある鋼材をホイストクレーン等で搬入する必要もない。   For transport to the site, the inner beam 51 and the outer beam 52 are individually transported and assembled at the site. Both the inner beam 51 and the outer beam 52 are about 1.5 m to 3 m in length and lightweight as 15 kg to 25 kg, and can be sufficiently transported by human power, so workability is good. In addition, because of such a lightweight member, there is no need to carry in heavy steel with a hoist crane or the like.

現場にて仮設のトラス梁5を順次組み付け、本設の梁で囲まれた開口2を構成する一組の梁1間にトラス梁5を配設し、取り付け金具4を介して本設の梁1に固定することにより、図4で示すような作業ステージ設置準備が完了する。   Temporary truss beams 5 are sequentially assembled at the site, the truss beams 5 are arranged between a pair of beams 1 constituting the opening 2 surrounded by the main beams, and the permanent beams are installed via the mounting bracket 4. By fixing to 1, the work stage installation preparation as shown in FIG. 4 is completed.

ここで、仮設のトラス梁5は取り付け金具4を介して本設の梁1に固定されることから、取り付け金具4を調整することによって、本設の梁1とトラス梁5のそれぞれの天端レベルを同一もしくは略同一に調整することができる。そしてこのことは、それらの上に設置される作業ステージの平坦性、安定性の確保に繋がる。   Here, since the temporary truss beam 5 is fixed to the main beam 1 via the mounting bracket 4, the top ends of the main beam 1 and the truss beam 5 can be adjusted by adjusting the mounting bracket 4. The level can be adjusted to be the same or substantially the same. And this leads to ensuring the flatness and stability of the work stage installed on them.

次に、図5で示すように、軽量の鋼製の足場板6を現場へ搬送し、足場板6をその長手方向がトラス梁5と直交するように敷き並べて番線等で固定することにより、軽量のトラス梁5の上に軽量の作業ステージ6が完成する。   Next, as shown in FIG. 5, by transporting the lightweight steel scaffolding plate 6 to the site, laying the scaffolding plate 6 so that the longitudinal direction thereof is orthogonal to the truss beam 5, and fixing with a wire or the like, A lightweight work stage 6 is completed on the lightweight truss beam 5.

作業ステージ6が完成したら、地下1階の施工と、地下2階の施工を同時に実行する。地下1階の施工は、本設の梁1以外の本設構造物である、本設の柱のコンクリート打設や本設の外壁のコンクリート打設、さらには、必要に応じて本設の中壁のコンクリート打設などとその養生、型枠の脱型等である。図6は、本設の柱7が施工された状況を示している。   When the work stage 6 is completed, construction on the first basement and construction on the second basement are executed simultaneously. Construction on the first basement floor is a permanent structure other than the main beam 1, concrete placement of the main pillar, concrete placement of the outer wall of the main construction, and if necessary, For example, placing concrete on the wall and curing it, removing the formwork. FIG. 6 shows a situation where the main pillar 7 is constructed.

一方、地下2階の施工は、地下1階下の掘削、地下2階の本設の梁筋、柱筋、外壁筋等の配筋や梁用のコンクリート打設および養生等である。   On the other hand, the construction on the second basement floor is excavation on the first basement floor, reinforcement of main beam bars, column bars, outer wall bars, etc. on the second basement floor, and concrete placement and curing for beams.

この地下1階の施工においては、既述するように作業ステージ6の平坦性、安定性が確保されていることから、作業性が良好となる。   In the construction of the first basement, workability is improved because the flatness and stability of the work stage 6 are ensured as described above.

上記する地下1階、地下2階の施工が完了したら、作業ステージ6を解体し、仮設のトラス梁5を解体し、下階へ搬送して同様の手順にて地下2階以深の施工を進める。なお、この解体や搬送においても、ステージ6の構成部材と仮設のトラス梁5の構成部材がともに軽量であり、人力搬送が可能であることから作業性が良好である。   When the construction on the first basement floor and the second basement floor is completed, the work stage 6 is disassembled, the temporary truss beam 5 is dismantled, transported to the lower floor, and the construction below the second basement floor is advanced in the same procedure. . Even in this dismantling and transporting, both the constituent members of the stage 6 and the temporary truss beams 5 are lightweight and can be transported manually, so that workability is good.

以後、地下2階も同様に施工を進め、計画された地下階まで逆巻き工法を実行して全施工が終了する。   Thereafter, the construction on the second basement is similarly proceeded, and the reverse winding method is executed to the planned basement to complete the whole construction.

このように、図示する逆巻き工法によれば、本設の梁で囲まれた開口2に複数の仮設のトラス梁5を設置し、本設の梁1とトラス梁5の上に仮設のステージ6を設置し、ステージ6の上で当該階の施工をおこない、ステージ6の下で下階の施工を同時におこなうものにおいて、使用する仮設のトラス梁5として、人力にて搬送可能な重量の部材を施工場所に搬送し、そこで部材同士が組み付けられて構成される軽量のトラス梁5を適用することにより、ホイストクレーンの設置や盛り換えを不要にでき、本設の梁で包囲された開口2の寸法等に左右されることなく、効率的に上下の地下階を施工することが可能となり、施工性に優れ、工期短縮を図ることができる。   As described above, according to the illustrated reverse winding method, a plurality of temporary truss beams 5 are installed in the opening 2 surrounded by the main beams, and the temporary stage 6 is placed on the main beams 1 and the truss beams 5. Is installed on the stage 6 and the lower floor is installed at the same time under the stage 6 as a temporary truss beam 5 to be used. By applying a lightweight truss beam 5 that is transported to the construction site and assembled with each other, it is possible to eliminate the need for hoist crane installation and replacement, and the opening 2 surrounded by the main beam. It is possible to construct the upper and lower basement floors efficiently without being affected by the dimensions, etc., which is excellent in workability and can shorten the construction period.

また、適用される仮設のトラス梁は、図3で示す実施の形態以外にも、図7で示す他の実施の形態のトラス梁であってもよい。   In addition to the embodiment shown in FIG. 3, the temporary truss beam to be applied may be a truss beam in another embodiment shown in FIG. 7.

このトラス梁8は、中央に本体のトラス状のビーム81を備え、その両端に把持具82を備えた構成の梁である。   The truss beam 8 is a beam having a structure in which a truss-like beam 81 of the main body is provided at the center and a gripping tool 82 is provided at both ends thereof.

把持具82はビーム81から伸長自在であり、したがって開口2の梁1間の長さに応じて伸長させ、把持具82を対向する梁1間に架け渡して固定することができる。このトラス梁8を使用する場合は、取り付け金具の設置を不要とでき、作業性がより一層向上する。   The gripping tool 82 can be extended from the beam 81, and thus can be extended according to the length between the beams 1 of the opening 2, and the gripping tool 82 can be bridged between the opposing beams 1 and fixed. When this truss beam 8 is used, it is not necessary to install a mounting bracket, and the workability is further improved.

以上、本発明の実施の形態を図面を用いて詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

1…本設の梁、2…開口(本設の梁で囲まれた開口)、3…柱筋、4…取り付け金具、5…仮設のトラス梁(トラス梁)、51…内ビーム、52…外ビーム、6…仮設のステージ(足場板)、7…本設の柱、8…仮設のトラス梁(トラス梁)、81…ビーム、82…把持具   DESCRIPTION OF SYMBOLS 1 ... Main beam, 2 ... Opening (opening enclosed by main beam), 3 ... Column reinforcement, 4 ... Mounting bracket, 5 ... Temporary truss beam (truss beam), 51 ... Inner beam, 52 ... Outer beam, 6 ... Temporary stage (scaffolding plate), 7 ... Main column, 8 ... Temporary truss beam (truss beam), 81 ... Beam, 82 ... Gripping tool

上記する逆巻き工法に関する従来技術として、特許文献1,2などを挙げることができる。
Patent documents 1 and 2 etc. can be mentioned as conventional technology about the above-mentioned reverse winding method.

Claims (4)

地上階から地下階に向かって順次駆体を構築していく逆巻き工法において、各階の駆体は、複数の柱と、柱間に架け渡された梁と、を少なくとも備えている逆巻き工法であって、
各階の施工方法は、本設の梁を施工し、該本設の梁で囲まれた開口に複数の仮設のトラス梁を設置し、本設の梁とトラス梁の上に仮設のステージを設置し、ステージ上で当該階の本設施工をおこなうとともに、ステージ下の下階の施工を同時におこなうものであり、
前記仮設のトラス梁は、人力にて搬送可能な重量の部材を施工場所に搬送し、そこで部材同士が組み付けられて構成される軽量のトラス梁である、逆巻き工法。
In the reverse winding method in which the body is constructed sequentially from the ground floor to the basement floor, the body on each floor is a reverse winding method having at least a plurality of columns and beams spanned between the columns. And
The construction method for each floor is to construct a permanent beam, install multiple temporary truss beams in the opening surrounded by the permanent beam, and install temporary stages on the permanent beam and the truss beam. In addition to performing the main construction of the floor on the stage, the construction of the lower floor below the stage is performed simultaneously.
The temporary truss beam is a light-weight truss beam constructed by transporting a member having a weight that can be transported by human power to a construction site and assembling the members there.
本設の梁に取り付け金具を取り付けておき、該取り付け金具に仮設のトラス梁を固定する請求項1に記載の逆巻き工法。   The reverse winding method according to claim 1, wherein a mounting bracket is attached to the main beam, and the temporary truss beam is fixed to the mounting bracket. 仮設のトラス梁が本設の梁を把持する把持具を備えており、仮設のトラス梁を本設の梁に設置した際に把持具によって本設の梁への固定が同時におこなわれる請求項1に記載の逆巻き工法。   The temporary truss beam includes a gripping tool for gripping the permanent beam, and the temporary truss beam is simultaneously fixed to the permanent beam by the gripping tool when the temporary truss beam is installed on the permanent beam. The reverse winding method described in 1. 本設の梁と仮設のトラス梁のそれぞれの天端レベルが同一もしくは略同一である請求項1〜3のいずれかに記載の逆巻き工法。   The reverse winding method according to any one of claims 1 to 3, wherein the top end levels of the permanent beam and the temporary truss beam are the same or substantially the same.
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CN106638683A (en) * 2017-01-26 2017-05-10 上海建工二建集团有限公司 Reverse building method soil sampling opening rapid sealing construction connecting joint and construction method
CN114939289A (en) * 2022-06-01 2022-08-26 中国化学工程第十四建设有限公司 Inverted installation method of filter press for press filtration production

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CN114939289B (en) * 2022-06-01 2023-12-19 中国化学工程第十四建设有限公司 Flip-chip mounting method of filter press for squeezing and filtering production

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