JP4200521B2 - Unit box basement - Google Patents

Unit box basement Download PDF

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JP4200521B2
JP4200521B2 JP2003417285A JP2003417285A JP4200521B2 JP 4200521 B2 JP4200521 B2 JP 4200521B2 JP 2003417285 A JP2003417285 A JP 2003417285A JP 2003417285 A JP2003417285 A JP 2003417285A JP 4200521 B2 JP4200521 B2 JP 4200521B2
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basement
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metal
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JP2005146814A (en
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惣一 切山
明徳 村上
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株式会社ビィアンドエル
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Description

本発明は、主に鋼材を用いて工場製作される金属製の地下ユニットを建設現場に搬入して地下に据付け設置することにより施工されるユニット式ボックス形地下室に関する。詳しくは、鉄骨を芯材とし、その芯材鉄骨を所定のピッチ間隔に配置して構成される軸組に鋼板等の金属板を固定してなる壁構造体、天井構造体及び床構造体を組み立ててラーメン構造の金属製地下ユニットを工場製作し、この地下ユニットの任意複数個を建設現場に搬入して掘削穴底部に形成のコンクリート製基礎上に列状に据付け設置し、かつ、隣接する地下ユニット同士を相互に接合連結することにより短辺方向に□型ラーメン構造で、かつ、長辺方向に耐震壁構造のボックス形地下躯体を構築して所望容積の地下室を施工するユニット式ボックス形地下室に関するものである。  The present invention relates to a unit-type box-type basement that is constructed by carrying a metal base unit, which is mainly manufactured using steel, into a construction site and installing it in the basement. Specifically, a wall structure, a ceiling structure, and a floor structure in which a steel plate is used as a core material, and a metal plate such as a steel plate is fixed to a shaft assembly configured by arranging the core material steel frames at a predetermined pitch interval. Assembled to produce a ramen-structured metal underground unit at the factory, and then install any number of these underground units into the construction site and install them in a row on a concrete foundation formed at the bottom of the excavation hole, and adjacent Unit type box type that builds a box-shaped underground structure with a square frame structure in the short side direction and a seismic wall structure in the long side direction to connect the underground units to each other and construct a basement of the desired volume It relates to the basement.

この種のボックス形地下室は、工場で高品質、高精度に製作(生産)可能な金属製形地下ユニットを建設現場に搬入して地下に埋設するだけでよく、全てを現場施工に依存するコンクリート造りあるいは鉄骨造りの地下室の場合に比べて、建設現場での建て方工事を非常に少なくして工期の大幅な短縮及び工費の節減が図れるだけでなく、トラック等のユニット運搬車が通行可能なところであれば、例えば都市部に多くみられる狭小地でも地下室を能率よく施工することが可能である。また、短辺方向に□型ラーメン構造で、かつ、長辺方向に耐震壁構造という複合構造の採用によって地下埋設状態で地下躯体に加わる大きな土圧や水圧に対しても十分な耐応強度を持つなど多くのメリットを有している。  For this type of box-type basement, it is only necessary to embed a metal-shaped underground unit that can be manufactured (produced) with high quality and high precision at the factory and embed it underground. Compared to a basement made of steel or steel frames, the construction work at the construction site is greatly reduced to significantly reduce the construction period and reduce construction costs, and unit vehicles such as trucks can be passed. However, for example, it is possible to efficiently construct a basement even in a narrow area often found in urban areas. In addition, by adopting a composite structure with a □ -type ramen structure in the short side direction and a seismic wall structure in the long side direction, it has sufficient proof strength against large earth pressure and water pressure applied to the underground frame in an underground state. Has many merits, such as having.

ところで、この種のユニット式ボックス形地下室において、ラーメン構造に構成される金属製地下ユニットにおける壁、天井及び床の各構造体として、従来は、図8に示すように、軸組用芯材鉄骨31の外側に鋼板などの金属板32を溶接等によって固定する構成が採用されていた。また、鉄骨や鋼板などのように、錆や腐食を発生しやすい金属素材を使用することを配慮して軸組用芯材鉄骨31の外側に固定された鋼板などの金属板32の外表面全域に特殊な塗料を用いて厚膜型の半永久防錆防食塗膜33を施し、かつ、建設現場での据え付け設置後は、地下ユニット外周域の余掘り部分に掘削土砂あるいはセメント系地盤固化材を突き固めながら埋戻す裏込め工事を行なう手段が採用されていた(例えば、特許文献1参照)。  By the way, in this type of unit type box-type basement, as a structure of a wall, a ceiling, and a floor in a metal underground unit configured in a ramen structure, conventionally, as shown in FIG. The structure which fixed the metal plates 32, such as a steel plate, to the outer side of 31 by welding etc. was employ | adopted. Further, the entire outer surface of the metal plate 32 such as a steel plate fixed to the outer side of the core 31 for the shaft assembly in consideration of using a metal material that easily generates rust and corrosion, such as a steel frame and a steel plate. A special semi-permanent anti-corrosion and anti-corrosion coating film 33 is applied using a special paint, and after installation at the construction site, excavated soil or cement-based ground solidification material is applied to the overexcavated part of the outer periphery of the underground unit. Means for performing backfilling work while back-filling was adopted (for example, see Patent Document 1).

特開平7−317083号公報  Japanese Patent Laid-Open No. 7-317083

しかし、上記のように軸組用芯材鉄骨31の外側に金属板32を固定した構成の従来の地下ユニットでは、金属板32よりも内方へ向けて複数の芯材鉄骨31が所定のピッチ間隔で突出しているために、それら芯材鉄骨31の突出幅Wに相当する帯状領域A(図8の格子線挿入箇所)は地下室の有効内容積として使用することができず、実質的な有効内容積は芯材鉄骨の内端部間を結ぶ線で囲まれた領域に限定される。また、この種のボックス形地下室では、一般的に地下ユニットの内面側にウレタンの吹付け等によって断熱層34を形成するが、この場合も芯材鉄骨31が断片的に内方へ突出しているために、地下室全体の断熱性を良好に確保するためには、金属板32の内面だけでなく、芯材鉄骨21の内方への突出部分も取り囲む状態で断熱層34を吹付け形成する必要があって、断熱作業自体が手数のかかる面倒なものとなるばかりか、断熱処理に多くのウレタン等の断熱材料を使用しなければならない。  However, in the conventional underground unit in which the metal plate 32 is fixed to the outer side of the shaft core steel frame 31 as described above, a plurality of core material steel frames 31 are arranged at a predetermined pitch inward from the metal plate 32. Since it protrudes at intervals, the band-like region A (the lattice line insertion location in FIG. 8) corresponding to the protruding width W of the core steel frame 31 cannot be used as the effective internal volume of the basement, and is substantially effective. The internal volume is limited to a region surrounded by a line connecting the inner ends of the core steel frame. In this type of box-type basement, the heat insulating layer 34 is generally formed on the inner surface side of the basement unit by spraying urethane or the like. In this case as well, the core steel frame 31 projects inwardly in pieces. Therefore, in order to ensure the heat insulation of the whole basement, it is necessary to spray and form the heat insulating layer 34 in a state of surrounding not only the inner surface of the metal plate 32 but also the inwardly protruding portion of the core steel frame 21. Therefore, the heat insulation work itself becomes troublesome and cumbersome, and many heat insulation materials such as urethane must be used for the heat treatment.

さらに、耐久寿命の向上のための防錆防食対策として、金属板32の外表面全域に厚膜型の半永久防錆防食塗膜33を形成しているが、この場合は、高価な特殊塗料の使用が必要である上に、塗膜全域を均一な厚さに仕上げる塗装工事に高度な技術及び多大な手間を要し、加えて、建設現場での土砂やセメント系地盤固化材の埋戻し工事にも多大な手数及び手数を要し、これら防錆防食対策としての塗装および建設現場での埋戻し工事と、上述した断熱処理に要する作業性の悪さ及びウレタン等の使用量の多さと相俟って、地下室全体としてのトータルコストが嵩みやすいという問題があった。  Further, as a rust and corrosion preventive measure for improving the durability life, a thick film type semi-permanent rust and corrosion preventive coating 33 is formed on the entire outer surface of the metal plate 32. In this case, an expensive special paint is used. In addition to the need for use, high-level technology and a great deal of labor are required for the painting work to finish the entire coating film to a uniform thickness. In addition, backfilling of earth and sand and cement-based ground solidification material at the construction site In addition, it takes a great deal of labor and labor, and it is incompatible with painting and backfilling work at the construction site as a countermeasure against rust and corrosion, the poor workability required for the above-mentioned heat insulation treatment, and the large amount of urethane used. As a result, the total cost of the basement as a whole tends to increase.

本発明は上記のような実情に鑑みてなされたもので、防錆防食のための塗装の不要化、現場工事の簡略合理化、断熱作業の容易化、断熱材料の節減、さらには金属材使用量の減少によってトータルコストの著しい低減を図ることができ、しかも従来と同等以上の有効内容積を確保しつつ、構造強度及び防水・防湿・防結露性・断熱性の向上を実現できるユニット式ボックス形地下室命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 circumstances, eliminating the need for coating for rust and corrosion prevention, simplifying and simplifying on-site construction, facilitating heat insulation work, saving heat insulation materials, and further using metal materials The unit type box type that can achieve a significant reduction in total cost due to the decrease in structure, and can improve the structural strength and waterproof / moisture / condensation / insulation properties while ensuring an effective internal volume equal to or greater than that of the previous model. Its purpose is to provide basement life.

上記目的を達成するために案出された本発明に係るユニット式ボックス形地下室は、所定のピッチ間隔に配置された芯材鉄骨を軸組とし、この軸組用芯材鉄骨に金属板が固定されてなる左右一対の壁構造体、天井構造体及び床構造体を工場生産段階で組み立ててラーメン構造に構成された金属製地下ユニットの任意複数個を建設現場に搬入して掘削穴底部に形成のコンクリート製基礎上に列状に据付け設置し、かつ、隣接する地下ユニット同士を相互に接合連結することにより短辺方向に□型ラーメン構造で、かつ、長辺方向に耐震壁構造のボックス形地下躯体が構築されるユニット式ボックス形地下室であって、前記金属製地下ユニットにおける壁、天井及び床の各構造体は、軸組用芯材鉄骨の内側に金属板が固定されており、かつ、前記ボックス形地下躯体の外側には、その外周全域を取り囲む状態でコンクリート壁体が地下躯体と一体複合構造となるように形成されているととともに、該ボックス形地下躯体の内壁面となる各構造体の金属板内面には、断熱層が形成されていることを特徴としている。  The unit-type box-type basement according to the present invention devised to achieve the above object uses a core steel frame arranged at a predetermined pitch interval as a shaft assembly, and a metal plate is fixed to the core steel frame for the shaft assembly. A pair of left and right wall structures, ceiling structures and floor structures are assembled at the factory production stage, and an arbitrary number of metal underground units configured in a ramen structure are brought into the construction site and formed at the bottom of the excavation hole A box-type frame structure with a □ -type ramen structure in the short side direction and a seismic wall structure in the long side direction by installing and installing adjacent underground units in a row on a concrete foundation A unit-type box-shaped basement in which an underground skeleton is constructed, and each of the wall, ceiling, and floor structures in the metal underground unit has a metal plate fixed to the inner side of the core steel frame for the frame assembly, and The above On the outside of the box-shaped underground structure, a concrete wall is formed so as to have an integrated composite structure with the underground structure in a state of surrounding the entire outer periphery thereof, and each structure that becomes the inner wall surface of the box-shaped underground structure A heat insulating layer is formed on the inner surface of the metal plate.

上記のごとき特徴構成を有する本発明によれば、地下ユニットにおける各構造体の軸組用芯材鉄骨の内側に金属板を固定しているので、芯材鉄骨が地下室内方へ向けて突出することがなくなり、軸組用芯材鉄骨の外側に金属板を固定してなる従来の地下室と同等または同等以上の有効内容積を確保しながらも、ウレタン等の断熱材料を全域が平坦な金属板内面に吹付けることで室内全域を均一に断熱処理することが可能であり、従来に比べて断熱作業の容易化及び断熱層の高品質化が図れるとともに、断熱材料の使用量も節減することができる。  According to the present invention having the above-described characteristic configuration, since the metal plate is fixed to the inner side of the core material steel frame for each structural body in the underground unit, the core material steel frame projects toward the inside of the underground room. A metal plate with a flat area of heat insulating material such as urethane while ensuring an effective internal volume equal to or greater than that of a conventional basement, in which a metal plate is fixed to the outside of the core steel frame By spraying on the inner surface, it is possible to uniformly insulate the entire interior of the room, making heat insulation work easier and improving the quality of the heat insulation layer compared to conventional methods, and reducing the amount of heat insulation material used. it can.

そのうえ、建設現場では、コンクリート製基礎上に据付け設置された複数個の地下ユニットの隣接するもの同士を相互に接合連結して組立てられたボックス形地下躯体の外側の余掘り部分に、その地下躯体の外周全域を取り囲むようにコンクリート壁体を形成するだけで、このコンクリート壁体を裏込め工及び金属製地下躯体の全外面に対する防錆・防食塗装に代替させることが可能であり、地下ユニットの工場製作時における高価な塗料の使用、高度な技術及び多大な時間を要する塗装工事を省略することができるとともに、建設現場で掘削土砂やセメント系地盤固化材を突き固めながら順次埋め戻すといった手数及び時間のかかる裏込め工事も簡略合理化することができる。加えて、各地下ユニットにおける各構造体の軸組用芯材鉄骨の大部分が外方へ向けて突出し、その突出鉄骨部分が前記コンクリート壁体内に埋設されて、その鉄骨部分埋設のコンクリート壁体と地下躯体とにより、いわゆるSC造りの一体複合構造を構成することになるので、各地下ユニットにおける金属材(芯材鉄骨及び金属板)の使用量を減少することも可能となり、上述した塗装の省略化、現場工事の簡略合理化、断熱作業の容易化、断熱材料の節減と相俟って、トータルコストの著しい低減を図りつつ、構造強度を向上することができる。さらに、内外二重壁構造であるため、地下室として要求される防水・防湿・防結露性に優れているとともに、地下水位の高い地域における浮力対策性(浮き上がり防止性)にも優れ、地下室全体の耐久寿命の著しく増進を図ることができるという効果を奏する。  In addition, at the construction site, the underground structure is installed in an overexcavation part outside the box-shaped underground structure assembled by joining and connecting adjacent units of a plurality of underground units installed and installed on a concrete foundation. It is possible to replace the concrete wall with a rust-proofing and anti-corrosion coating on the entire outer surface of the metal underground frame by simply forming a concrete wall so as to surround the entire outer periphery of the The use of expensive paint at the time of factory production, advanced technology and time-consuming painting work can be omitted, and the work of refilling the drilling soil and cement-based ground solidification material at the construction site sequentially Time-consuming backfilling work can be simplified and rationalized. In addition, most of the core steel frames for the frames of each structure in each underground unit protrude outward, and the protruding steel part is embedded in the concrete wall, and the concrete wall embedded in the steel part And the underground frame constitute a so-called integrated structure of SC construction, so it is possible to reduce the amount of metal materials (core steel frame and metal plate) used in each underground unit. Combined with omission, simplified rationalization of on-site construction, easy thermal insulation work, and reduction of thermal insulation materials, the structural strength can be improved while significantly reducing the total cost. Furthermore, because of the double wall structure inside and outside, it has excellent waterproof, moisture-proof, and dew condensation properties required for the basement, as well as excellent buoyancy countermeasures (prevention of lifting) in areas with high groundwater levels. There is an effect that the durability life can be remarkably increased.

上記のような本発明に係るユニット式ボックス形地下室において、特に、請求項2に記載のように、金属製地下ユニットにおける壁構造体、床構造体及び天井構造体の軸組用芯材鉄骨に、それら各構造体への負荷荷重の分布に対応させて等分布またはほぼ等分布荷重の状態になるように金属製の補強材を横架固定することにより、各構造体の芯材鉄骨のピッチ間隔を各構造体毎の負荷荷重の最大値に対応させて狭小な等ピッチ間隔に設定する必要が無く地下ユニットの製作コストの一層の低減を図りつつ、各構造体それぞれに必要な構造強度を確保させるとともに、同一大きさの地下ユニット単体の重量も減少して運搬費用及び建て方工事費用の低減も図れ、所定の地下室の施工コストを一層低減することができる。  In the unit-type box-shaped basement according to the present invention as described above, in particular, as described in claim 2, the core structure steel frame for a wall structure, a floor structure, and a ceiling structure in a metal basement unit. The pitch of the core steel frame of each structure is fixed by horizontally fixing a metal reinforcing material so as to be in a state of equal distribution or almost equal load corresponding to the distribution of load load to each structure. It is not necessary to set the interval to a narrow equal pitch interval corresponding to the maximum load of each structure, and the structural strength required for each structure can be reduced while further reducing the cost of manufacturing underground units. In addition, the weight of a single underground unit of the same size can be reduced, so that the transportation cost and the construction cost can be reduced, and the construction cost of a predetermined basement can be further reduced.

また、本発明に係るユニット式ボックス形地下室において、請求項3に記載のように、前記軸組用芯材鉄骨の外側に、地下躯体の外周を取り囲む状態に形成されるコンクリート壁体を補強する金属製メッシュを固定することにより、コンクリート壁体、ひいてはSC複合構造の強度を一層向上することができる。  Moreover, in the unit type box-type basement according to the present invention, as described in claim 3, a concrete wall body formed to surround the outer periphery of the underground frame is reinforced outside the shaft core steel frame. By fixing the metal mesh, the strength of the concrete wall, and thus the SC composite structure can be further improved.

さらに、本発明に係るユニット式ボックス形地下室において、請求項4に記載のように、コンクリート壁体の外側位置に、該コンクリート壁体を建設現場で形成するための土留め用矢板を埋殺し状態で地中に打ち込む手段を採用する場合は、仮枠工事を不要にして施工の簡略化及び隣接地への影響を少なくすることができるとともに、地下ユニット、地下躯体の対地盤支持強度を大きくして、不同沈下の防止効果を高めることができる。  Furthermore, in the unit type box-type basement according to the present invention, the earth retaining sheet pile for forming the concrete wall body at the construction site is buried in the outer position of the concrete wall body as described in claim 4. In the case of adopting the means to drive into the ground, it is possible to simplify the construction and reduce the influence on the adjacent land by eliminating the need for temporary frame work, and increase the support strength of the underground unit and underground frame to the ground. Thus, the effect of preventing uneven settlement can be enhanced.

以下、本発明の実施の形態を、図面を参照しながら説明する。
図1は本発明に係るユニット式ボックス形地下室の施工状態の概要を示す概略斜視図、図2は同地下室の施工完了状態を示す概略縦断正面図、図3は図2のX−X線に沿った縦断側面図、図4は図2のY−Y線に沿った横断平面図、図5は図2のZ−Z線に沿った横断平面図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a schematic perspective view showing an outline of a construction state of a unit type box-type basement according to the present invention, FIG. 2 is a schematic longitudinal front view showing a construction completion state of the basement, and FIG. 3 is taken along line XX of FIG. 4 is a cross-sectional plan view taken along line YY in FIG. 2, and FIG. 5 is a cross-sectional plan view taken along line ZZ in FIG.

このユニット式ボックス形地下室は、寸法や形状などを標準化して同一仕様、同一構造に工場製作された金属製地下ユニット1の任意複数個をトラック等によって建設現場に搬入した上、地下室施工予定箇所の周囲の地中にH形鋼11を介して埋殺し状態に打ち込まれた土留め用矢板12で囲まれた掘削穴底部に予め形成の鉄筋コンクリート製基礎2上に各地下ユニット1が長辺方向に連続するように直列状に据付け設置するとともに、隣接する地下ユニット1,1同士を相互に接合連結し、かつ、直列状に設置された複数個の地下ユニット1の長辺方向両端にはそれぞれ妻壁3,3(図3〜図5参照)を固定することによってボックス形地下躯体10が構築され、その内部が所望の容積を持つ地下室BRに構成(完工)されている。  This unit-type box-type basement is standardized in terms of dimensions and shape, and any number of metal base units 1 manufactured in the same specifications and structure at the factory are brought into the construction site by trucks, etc. Each underground unit 1 is in the long side direction on the reinforced concrete foundation 2 formed in advance at the bottom of the excavation hole surrounded by the earth retaining sheet pile 12 that is buried in the ground around the H-shaped steel 11 Are installed in series so as to be continuous with each other, and adjacent underground units 1 and 1 are joined and connected to each other, and at both ends in the long side direction of the plurality of underground units 1 installed in series, respectively. A box-shaped underground housing 10 is constructed by fixing the end walls 3 and 3 (see FIGS. 3 to 5), and the inside thereof is configured (completed) into a basement BR having a desired volume.

上記各金属製地下ユニット1は、図2〜図5及び図6に示すように、所定ピッチ間隔に配置されたT型鋼、H型鋼やチャンネル鋼等の芯材鉄骨4…を軸組として、図7に明示するように、その内側に鋼板等の金属板5が固定されてなる左右一対の壁構造体6,6と一つの天井構造体7と一つの床構造体8とを備え、これら左右一対の壁構造体6,6、天井構造体7及び床構造体8を工場製作段階で一体的に組立てて、図2に最も明瞭に示されているように、短辺方向に□型ラーメン構造に構成されており、これら地下ユニット1の接合連結によって短辺方向には□型ラーメン構造で、かつ、長辺方向には耐震壁構造のボックス形地下躯体10が構築されるように構成されている。なお、前記妻壁3,3は前記地下ユニット1における壁構造体6,6と同様に、所定ピッチ間隔に配置された芯材鉄骨4’…を軸組とし、その内側に鋼板等の金属板5’が固定されてなる。  As shown in FIGS. 2 to 5 and 6, each of the metal underground units 1 is composed of core steel frames 4, such as T-shaped steel, H-shaped steel, and channel steel, arranged at predetermined pitch intervals. 7, a pair of left and right wall structures 6, 6, a ceiling structure 7, and a floor structure 8, each of which has a metal plate 5 such as a steel plate fixed therein, A pair of wall structures 6 and 6, a ceiling structure 7 and a floor structure 8 are assembled together at the factory production stage, and as shown most clearly in FIG. The box-shaped underground structure 10 having a square frame structure in the short side direction and a seismic wall structure in the long side direction is constructed by joining and connecting these underground units 1. Yes. In addition, the said end walls 3 and 3 make the core material steel frame 4 '... arrange | positioned by predetermined pitch space | interval like a wall structure 6 and 6 in the said underground unit 1, a metal plate, such as a steel plate, in the inner side. 5 'is fixed.

上記のような所望容積の地下室BRを構成する□型ラーメン構造で、かつ、耐震壁構造のボックス形地下躯体10の外側、具体的には、各地下ユニット1における左右一対の壁構造体6,6及び両端妻壁3,3の外面と上述した土留め用矢板12との間及び各地下ユニット1における床構造体8の外面と鉄筋コンクリート製基礎2との間にコンクリートを打設し、さらに、各地下ユニット1における天井構造体7の上部にも地表面GLと同一レベルになるようにコンクリートを打設することにより、前記地下躯体10の外周全域を取り囲む状態のコンクリート壁体17が形成されている。このコンクリート壁体17内には各構造体6,7,8の芯材鉄骨4…及び妻壁3の芯材鉄骨4’…が埋設されており、これによって、ボックス形地下躯体10とコンクリート壁体17とは、いわゆるSC造りの一体複合構造に構成される。  A square frame structure constituting the basement BR having a desired volume as described above and the outside of the box-type underground housing 10 having a seismic wall structure, specifically, a pair of left and right wall structures 6 in each underground unit 1 6 and concrete between the outer surface of the end walls 3 and 3 and the above-mentioned earth retaining sheet pile 12 and between the outer surface of the floor structure 8 and the reinforced concrete foundation 2 in each underground unit 1, By placing concrete on the top of the ceiling structure 7 in each underground unit 1 so as to be at the same level as the ground surface GL, a concrete wall body 17 surrounding the entire outer periphery of the underground frame 10 is formed. Yes. In the concrete wall body 17, the core steel frames 4 ... of the structures 6, 7, 8 and the core steel frames 4 'of the end wall 3 are embedded, whereby the box-shaped underground frame 10 and the concrete wall are embedded. The body 17 is configured as a so-called SC-made integrated composite structure.

なお、前記各構造体6,7,8の軸組用芯材鉄骨4…の外端部には、図6に明示するように、金属製メッシュ13が固定されており、この金属製メッシュ13が前記コンクリート壁体17内に埋設されることにより、このコンクリート壁体17が補強されている。ただし、この金属製メッシュ13はなくてもよい。  As shown in FIG. 6, a metal mesh 13 is fixed to the outer ends of the cores for the shaft assembly 4 of the structures 6, 7, and 8, as shown in FIG. Is embedded in the concrete wall body 17 so that the concrete wall body 17 is reinforced. However, the metal mesh 13 may not be provided.

また、直列状に設置される複数個の金属製地下ユニット1のうち、長辺方向一端部の地下ユニット1を構成する天井構造体7には、上部建物(図示省略)との間で昇降するための階段設置用の開口7A(図1、図4参照)が形成されている。  Of the plurality of metal underground units 1 installed in series, the ceiling structure 7 constituting the underground unit 1 at one end in the long side direction moves up and down with the upper building (not shown). A staircase opening 7A (see FIGS. 1 and 4) is formed.

また、隣接する地下ユニット1,1同士は、図6に明示するように、両ユニット1,1における端部の軸組用芯材鉄骨(チャンネルを使用)4,4のウェブ部分にそれぞれ溶接したアングル14,14のフランジ間には、フラットバー等の締付け規制板15,16間にゴム弾性材料製のシール材18を挟み込み保持させた上、両芯材鉄骨4,4同士をボルト・ナット19で緊結することにより、シール材18をへたりのない適正な力で弾性圧縮させて外部から地下室BR内への地下水や雨水等の侵入を長期間に亘って防止するような水密状態で接合連結されている。  Further, as shown in FIG. 6, adjacent underground units 1 and 1 are welded to the web portions of the core steel frames (using channels) 4 and 4 at the ends of both units 1 and 1, respectively. Between the flanges of the angles 14, 14, a rubber elastic material sealing material 18 is sandwiched and held between tightening restriction plates 15, 16 such as flat bars, and both core steel frames 4, 4 are connected to each other by bolts and nuts 19. By tightly bonding, the sealing material 18 is elastically compressed with an appropriate force without sag and joined and connected in a watertight state to prevent intrusion of groundwater or rainwater from the outside into the basement BR for a long period of time. Has been.

さらに、上記ボックス型地下躯体10を構成する各地下ユニット1における壁構造体6、天井構造体7及び床構造体8の軸組用芯材鉄骨4…には、図2〜図5に示すように、各壁構造体6,7,8への負荷荷重の分布に対応させて全域に亘って等分布またはほぼ等分布の荷重が負荷されるような密度で金属製の補強材、詳しくは、鋼製フラットバー20…が互いに平行に横架固定されており、さらにまた、各構造体6,7,8の金属板5の内面には、建設現場でのウレタン等の吹付けによって図6に明示するように、全域に亘り平坦な断熱層21が形成されている。  Furthermore, as shown in FIGS. 2 to 5, the wall structure 6, the ceiling structure 7, and the floor structure 8 of the core structure steel frame 4 of the floor structure 8 in each underground unit 1 constituting the box-type underground structure 10 are shown in FIGS. 2 to 5. In addition, a reinforcing material made of metal at a density such that a load of equal distribution or almost equal distribution is applied over the entire area corresponding to the distribution of the load applied to each of the wall structures 6, 7, 8, Steel flat bars 20 are horizontally fixed in parallel with each other, and furthermore, the inner surfaces of the metal plates 5 of the structures 6, 7, 8 are sprayed with urethane or the like at the construction site in FIG. As clearly shown, a flat heat insulating layer 21 is formed over the entire region.

上記したように地下ユニット1における各構造体6,7,8の軸組用芯材鉄骨4…の内側に金属板5を固定することで、地下室BRの内方へ向けて芯材鉄骨4…が突出することがないため、軸組用芯材鉄骨の外側に金属板を固定してなる従来の地下室と同等または同等以上の有効内容積を確保しながらも、ウレタン等の断熱材料を全域が平坦な金属板5内面に吹付けることで室内全域を均一に断熱処理することが可能であり、従来に比べて断熱作業の容易化及び断熱層21の高品質化が図れるとともに、ウレタン等の断熱材料の使用量も節減することができる。  As described above, by fixing the metal plate 5 to the inside of the shaft core steel frames 4 of the structures 6, 7, and 8 in the underground unit 1, the core steel frames 4 inward toward the basement BR. As a result, the entire area is covered with a heat insulating material such as urethane while ensuring an effective internal volume equal to or greater than that of a conventional basement in which a metal plate is fixed to the outside of the core steel frame. By spraying on the inner surface of the flat metal plate 5, it is possible to uniformly insulate the entire interior of the room, making the heat insulation work easier and improving the quality of the heat insulation layer 21 compared to the conventional one, and heat insulation such as urethane. The amount of material used can also be reduced.

また、施工現場では、コンクリート製基礎2上に据付け設置された地下ユニット1の接合連結により構築されたボックス形地下躯体10外側の余掘り部分にコンクリート壁体17を形成することにより、このコンクリート壁17を裏込め工及び金属製地下ユニット1に対する防錆・防食塗装に代替させているため、地下ユニット1の工場製作時に高価な塗料を使用し、それの塗布に高度な技術及び多大な時間を要する塗装工事を省略するとともに、掘削土砂やセメント系地盤固化材を突き固めながら順次埋め戻すといった手数及び時間のかかる裏込め工事を簡略合理化することができる。加えて、各地下ユニット1における各構造体6,7,8の軸組用芯材鉄骨4…の大部分がコンクリート壁体17内に埋設されて、その鉄骨部分埋設のコンクリート壁体17と地下躯体10とで、いわゆるSRC造りの一体複合構造を構成することになるので、各地下ユニット1における金属材(芯材鉄骨及び金属板)の使用量も減少することも可能となり、上述した塗装の省略化、現場工事の簡略合理化、断熱作業の容易化、断熱材料の節減と相俟って、トータルコストの著しい低減を図りつつ、構造強度の向上及び耐久寿命の増進を図ることができる。  In addition, at the construction site, the concrete wall 17 is formed in an overexcavated portion outside the box-type underground skeleton 10 constructed by joining and connecting the underground units 1 installed and installed on the concrete foundation 2. 17 is replaced with anti-corrosion and anti-corrosion coating for the underground unit 1 and the metal underground unit 1, so expensive paint is used when manufacturing the underground unit 1 at the factory, and it requires advanced technology and a great deal of time to apply it. This eliminates the necessary painting work and simplifies and rationalizes the backfilling work that requires time and labor, such as refilling the excavated earth and sand and cement-based ground solidified material in sequence. In addition, most of the core steel cores 4 for the structures 6, 7, and 8 in each underground unit 1 are embedded in the concrete wall 17, and the steel part embedded concrete wall 17 and the underground Since the so-called SRC-made integrated composite structure is formed with the housing 10, it is possible to reduce the amount of metal materials (core steel frames and metal plates) used in each underground unit 1, and the above-described painting. Combined with omission, simplified rationalization of on-site construction, ease of heat insulation work, and reduction of heat insulation materials, it is possible to improve the structural strength and improve the durability life while significantly reducing the total cost.

さらに、SC造りの内外二重壁の複合構造となり、地下躯体10に作用する土圧や水圧の大部分を外側のC(芯材鉄骨埋設のコンクリート壁17)で負担させることができるため、地下ユニット1における金属材料(芯材鉄骨4…、金属板5)の使用量を減少して該地下ユニット1の製作コスト、さらにはトータルコストの一層の低減を図ることができる。  Furthermore, it becomes a composite structure of SC-made inner and outer double walls, and most of the earth pressure and water pressure acting on the underground frame 10 can be borne by the outer C (concrete wall 17 embedded in the core steel frame). By reducing the amount of metal material (core steel frame 4..., Metal plate 5) used in the unit 1, it is possible to further reduce the manufacturing cost and further the total cost of the underground unit 1.

本発明に係るユニット式ボックス形地下室の施工状態の概要を示す概略斜視図である。It is a schematic perspective view which shows the outline | summary of the construction state of the unit type box-type basement which concerns on this invention. 同地下室の施工完了状態を示す概略縦断正面図である。It is a schematic longitudinal front view which shows the construction completion state of the basement. 図2のX−X線に沿った縦断側面図である。It is a vertical side view along the XX line of FIG. 図2のY−Y線に沿った横断平面図である。FIG. 3 is a transverse plan view taken along line YY in FIG. 2. 図2のZ−Z線に沿った横断平面図である。FIG. 3 is a transverse plan view taken along the line ZZ in FIG. 2. 金属製地下ユニットの要部の拡大断面図である。It is an expanded sectional view of the principal part of a metal underground unit. 図2の一点鎖線で囲んだB部の拡大詳細図である。FIG. 3 is an enlarged detail view of a portion B surrounded by a one-dot chain line in FIG. 2. 従来のユニット式ボックス形地下室の要部の拡大断面図である。It is an expanded sectional view of the principal part of the conventional unit type box-type basement.

符号の説明Explanation of symbols

1 金属製地下ユニット
2 コンクリート製基礎
4 芯材鉄骨
5 金属板
6 壁構造体
7 天井構造体
8 床構造体
10 ボックス形地下躯体
12 土留め用矢板
13 金属製メッシュ
17 コンクリート壁体
20 鋼製フラットバー(補強材)
21 断熱層
BR 地下室
DESCRIPTION OF SYMBOLS 1 Metal underground unit 2 Concrete base 4 Core steel frame 5 Metal plate 6 Wall structure 7 Ceiling structure 8 Floor structure 10 Box-shaped underground frame 12 Earth retaining sheet pile 13 Metal mesh 17 Concrete wall 20 Steel flat Bar (reinforcing material)
21 Insulation layer BR Basement

Claims (4)

所定のピッチ間隔に配置された芯材鉄骨を軸組とし、この軸組用芯材鉄骨に金属板が固定されてなる左右一対の壁構造体、天井構造体及び床構造体を工場生産段階で組み立ててラーメン構造に構成された金属製地下ユニットの任意複数個を建設現場に搬入して掘削穴底部に形成のコンクリート製基礎上に列状に据付け設置し、かつ、隣接する地下ユニット同士を相互に接合連結することにより短辺方向に□型ラーメン構造で、かつ、長辺方向に耐震壁構造のボックス形地下躯体が構築されるユニット式ボックス形地下室であって、
前記金属製地下ユニットにおける壁、天井及び床の各構造体は、軸組用芯材鉄骨の内側に金属板が固定されており、かつ、前記ボックス形地下躯体の外側には、その外周全域を取り囲む状態でコンクリート壁体が地下躯体と一体複合構造となるように形成されているととともに、該ボックス形地下躯体の内壁面となる各構造体の金属板内面には、断熱層が形成されていることを特徴とするユニット式ボックス形地下室。
At the factory production stage, a pair of left and right wall structures, ceiling structures, and floor structures in which a core steel frame arranged at a predetermined pitch interval is used as a shaft assembly, and a metal plate is fixed to the core steel frame for the shaft assembly. Any number of metal underground units assembled into a ramen structure are brought into the construction site, installed and installed in rows on a concrete foundation formed at the bottom of the excavation hole, and adjacent underground units are connected to each other It is a unit type box-type basement in which a box-type underground structure with a □ type ramen structure in the short side direction and a seismic wall structure in the long side direction is constructed by joining and connecting to,
Each of the wall, ceiling, and floor structures in the metal underground unit has a metal plate fixed to the inside of the core steel frame for the frame assembly, and the outer periphery of the box-shaped underground skeleton is entirely outside. The concrete wall body is formed so as to have an integrated composite structure with the underground structure in the surrounding state, and a heat insulating layer is formed on the inner surface of the metal plate of each structure that becomes the inner wall surface of the box-shaped underground structure. Unit-type box basement characterized by
前記金属製地下ユニットにおける壁構造体、床構造体及び天井構造体の軸組用芯材鉄骨には、それら各構造体への負荷荷重の分布に対応させて等分布またはほぼ等分布荷重の状態になるように金属製の補強材が横架固定されている請求項1に記載のユニット式ボックス形地下室。  In the above-mentioned metal underground unit, the core steel for the frame structure of the wall structure, floor structure and ceiling structure is in a state of equal distribution or almost equal distribution corresponding to the distribution of load load to each structure. The unit type box basement according to claim 1, wherein a metal reinforcing material is horizontally fixed so as to become. 前記軸組用芯材鉄骨の外側には、地下躯体の外周を取り囲む状態に形成されるコンクリート壁体を補強する金属製メッシュが固定されている請求項1または2に記載のユニット式ボックス形地下室。  The unit type box-shaped basement according to claim 1 or 2, wherein a metal mesh that reinforces a concrete wall formed so as to surround an outer periphery of the underground frame is fixed to the outside of the core steel frame for the frame. . 前記コンクリート壁体の外側位置には、該コンクリート壁体を建設現場で形成するための土留め用矢板が埋殺し状態で地中に打ち込まれている請求項1〜3のいずれかに記載のユニット式ボックス形地下室。  The unit according to any one of claims 1 to 3, wherein a retaining sheet pile for forming the concrete wall body at a construction site is buried in the ground at an outer position of the concrete wall body. Box-type basement.
JP2003417285A 2003-11-11 2003-11-11 Unit box basement Expired - Fee Related JP4200521B2 (en)

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