JP2008291453A - Underground buried box - Google Patents

Underground buried box Download PDF

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JP2008291453A
JP2008291453A JP2007136059A JP2007136059A JP2008291453A JP 2008291453 A JP2008291453 A JP 2008291453A JP 2007136059 A JP2007136059 A JP 2007136059A JP 2007136059 A JP2007136059 A JP 2007136059A JP 2008291453 A JP2008291453 A JP 2008291453A
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panel
underground
box
frame
lightweight cement
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JP4709803B2 (en
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Shigeki Kanao
茂樹 金尾
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Kanaflex Corporation
カナフレックスコーポレーション株式会社
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<P>PROBLEM TO BE SOLVED: To provide an inexpensively-manufacturable underground buried box excellent in storability, transportability and constructibility. <P>SOLUTION: This underground buried box comprises a bottom panel 11L, a top panel 11U, and four side panels 11S. A composite panel material, which is constituted by mounting a lightweight cement plate 21A at least on the outer-surface side of a frame 20, is used as at least the four side panels 11S. The lightweight cement plate 21 is composed of a porous molded article which is obtained by filling the inside of a sealed mold for cement with a mixture obtained by mixing a foam formed by prefoaming cement, water, reinforcing fibers and a foaming agent, and curing and solidifying the mixture. In the molded article, the reinforcing fibers and the foams are contained in a dispersed state, and its specific gravity falls within the range of 0.5-1.0. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、例えば弱電線や光ケーブル、情報ケーブル、通信線などの地中埋設管同士を接続するマンホールやハンドホールなどの地中埋設箱に関する。   The present invention relates to underground boxes such as manholes and hand holes that connect underground pipes such as weak electric wires, optical cables, information cables, and communication lines.
地中埋設管同士を接続するマンホールやハンドホールなどの地中埋設箱としては、鉄筋コンクリート製のものが広く実用化されている。通常、この鉄筋コンクリート製の地中埋設箱は、工場において製作して、これを現場へ輸送して施工しているが、中空の構造物なので工場における保管性や現場への輸送性があまりよくないこと、大きさにもよるが、例えば500kg〜2000kgもの重量物なので、施工部位への据付作業にどうしても重機が必要になり、施工作業が大掛かりなものになること、鉄筋コンクリートで構成しているので、任意の位置に地中埋設管を接続するためのダクト口を形成できないこと、などの問題があった。   As underground burial boxes such as manholes and handholes for connecting underground pipes, those made of reinforced concrete are widely used. Normally, this underground box made of reinforced concrete is manufactured at the factory and transported to the site for construction. However, since it is a hollow structure, it is not very good for storage in the factory and transportability to the site. Although it depends on the size, for example, it is a heavy product of 500 kg to 2000 kg, so heavy equipment is absolutely necessary for the installation work to the construction site, and the construction work becomes large, because it is composed of reinforced concrete, There were problems such as the inability to form a duct opening for connecting the underground pipe at an arbitrary position.
そこで、ハンドホールとして、アングル材を直方体状に組み立ててなる骨格と、この骨格の6面に固定されるパネル材とを備え、施工現場において骨格を組み立てるとともに、組み立てた骨格にパネル材を固定することで、施工可能となしたものが提案されている(例えば、特許文献1参照。)。   Therefore, as a hand hole, it is equipped with a skeleton that is an angle material assembled into a rectangular parallelepiped shape and a panel material that is fixed to the six surfaces of this skeleton, and assembles the skeleton at the construction site and also fixes the panel material to the assembled skeleton. The thing which became construction possible by this is proposed (for example, refer patent document 1).
特開2005−30044号公報JP 2005-30044 A
ところが、前記特許文献1記載のハンドホールにおいても、側面パネルとして、ポリエチレンやポリプロピレンなどの合成樹脂パネルや、発泡ウレタンをFRP板で挟んだ複合パネルや、SMC(シートモールディングコンパウンド)や、レジンコンクリート製のパネルを用いているので、パネルの製作コストが高くなること、パネルを十分に軽量に構成できず、人手による施工作業時に多大な労力を要すること、骨格がハンドホールの内面に露出しているので、ハンドホールの外観が低下するとともに、骨格の錆による耐久性の低下が懸念されること、などの問題があった。   However, even in the handhole described in Patent Document 1, as a side panel, a synthetic resin panel such as polyethylene or polypropylene, a composite panel in which foamed urethane is sandwiched between FRP plates, SMC (sheet molding compound), or resin concrete The panel manufacturing cost is high, the panel cannot be configured to be sufficiently lightweight, requires a lot of labor during manual construction work, and the skeleton is exposed on the inner surface of the handhole As a result, the appearance of the handhole deteriorates, and there is a problem that the durability is deteriorated due to rust of the skeleton.
本発明の目的は、安価に製作可能で、しかも保管性、輸送性、施工性に優れた地中埋設箱を提供することである。   An object of the present invention is to provide an underground box that can be manufactured at low cost and is excellent in storage, transportability, and workability.
本発明に係る地中埋設箱は、底面パネルと上面パネルと4つの側面パネルとを備え、少なくとも4つの側面パネルとして、枠状フレームの少なくとも外面側に軽量セメント板を取り付けてなる複合パネル材を用いたものである。   The underground burial box according to the present invention includes a bottom panel, a top panel, and four side panels, and a composite panel material in which a lightweight cement board is attached to at least the outer surface side of the frame-like frame as at least four side panels. It is what was used.
この地中埋設箱では、例えば底面パネルを施工位置に設置して、その上側に4枚の側面パネルを角筒状に組み付け、角筒状の側面パネルの上面に上面パネルを固定して、地中埋設箱を施工することができる。したがって、地中埋設箱を構成する6枚のパネルを予め工場等において製作して、地中埋設箱をパネルの状態で工場等に保管し、必要に応じてパネルの状態で施工現場へ輸送できるので、工場での保管スペースを小さくでき、しかも現場への輸送時に、大型車での搬入が不要で、輸送コストを削減できる。また、施工現場では、パネルを結合して組み立てるだけでよいので、現場における施工作業を大幅に軽減できる。更に、側面パネルとして用いる複合パネル材は、枠状フレームの少なくとも外面側に軽量セメント板を取り付けたものなので、人手により容易に持ち運びが可能な重さに構成しつつ、枠状フレームにより上載荷重を効果的に受け止め得る十分な強度剛性を確保できる。しかも、鉄筋コンクリート製の地中埋設箱と比較して、大きさの異なる複合パネル材を容易に製作できるので、特殊サイズの地中埋設箱にも容易に対応でき、しかも養生時間が不要で、各サイズのキットを在庫することにより、受注から出荷までの納期を短縮することができる。また、軽量セメント板は、加工性が良いので、例えば現場において側面パネルの任意の位置にダクト口を形成することが可能となる。尚、底面パネル及び上面パネルに関しても、側面パネルと同様に、複合パネル材で構成することができる。   In this underground burial box, for example, a bottom panel is installed at a construction position, four side panels are assembled into a rectangular tube shape on the upper side, and a top panel is fixed to the top surface of the rectangular tube side panel. A buried box can be constructed. Therefore, the six panels constituting the underground box can be manufactured in advance in a factory, etc., and the underground box can be stored in the factory in the state of the panel, and transported to the construction site in the state of the panel as necessary. Therefore, it is possible to reduce the storage space in the factory, and it is not necessary to carry in a large vehicle at the time of transportation to the site, and the transportation cost can be reduced. In addition, at the construction site, it is only necessary to combine and assemble the panels, so that the construction work at the site can be greatly reduced. Furthermore, since the composite panel material used as the side panel has a lightweight cement board attached to at least the outer surface side of the frame-like frame, it is constructed to have a weight that can be easily carried by a hand, and the upper load is applied by the frame-like frame. Sufficient strength and rigidity that can be effectively received can be secured. In addition, composite panel materials with different sizes can be easily manufactured compared to underground reinforced concrete underground boxes, which can easily accommodate special-size underground underground boxes and does not require curing time. By stocking kits of the size, the delivery time from order receipt to shipment can be shortened. Further, since the lightweight cement board has good workability, for example, a duct port can be formed at an arbitrary position of the side panel at the site. Note that the bottom panel and the top panel can also be made of a composite panel material, similarly to the side panel.
前記軽量セメント板が、セメント、水、補強繊維及び起泡剤をプレフォームした泡を混練した混練物を、密閉したセメント用成形型内に充填し、養生固化した多孔質成形体からなり、該成形体中に前記補強繊維及び泡を分散状態で含有してなり、比重が0.5〜1.0の範囲内であることが好ましい実施の形態である。このような構成の軽量セメント板は、鋸等で容易に加工することができ、現場合わせでの寸法調整も容易なので、パネル製造時や組付時における取扱性を向上できる。また、軽量セメント板を多孔質成形体で構成しているので、軽量セメント板における断熱性及び保温性を一層向上することができ、しかも複合パネル材を極力軽量に構成することができる。また、軽量セメント板は、それに分散状態で含有した補強繊維の絡み合いにより補強された構造を有することから、曲げ弾性係数が、例えば1700N/mm2以上と高強度であるし、釘打ち等も可能なものなので、複合パネル材の施工性を向上できる。 The lightweight cement board is composed of a porous molded body in which a kneaded product obtained by kneading foam formed by cement, water, reinforcing fibers, and a foaming agent is filled in a closed cement mold and cured and cured. In a preferred embodiment, the molded body contains the reinforcing fibers and foam in a dispersed state, and the specific gravity is in the range of 0.5 to 1.0. The lightweight cement board having such a configuration can be easily processed with a saw or the like, and can be easily adjusted in size on the site, so that the handling at the time of panel manufacture and assembly can be improved. Moreover, since the lightweight cement board is comprised with the porous molded object, the heat insulation and heat retention in a lightweight cement board can be improved further, and also a composite panel material can be comprised as lightly as possible. In addition, since the lightweight cement board has a structure reinforced by entanglement of reinforcing fibers contained in a dispersed state, the flexural modulus is as high as, for example, 1700 N / mm 2 or more, and nailing is possible. Therefore, the workability of the composite panel material can be improved.
前記軽量セメント板として、混連物中に、セメント100重量部に対して、前記補強繊維を0.5〜5重量部を配合してなるものが好ましい。このように構成することで、成形体中に分散状態で含有する補強繊維の絡み合いによる補強構造が形成され、軽量セメント板の強度剛性を向上できる。また、補強繊維としては、ポリビニルアルコール繊維、即ちビニロンが好ましい。前記補強繊維の繊維長は、4〜35mmの範囲であることが好ましい。   As the lightweight cement board, it is preferable to mix 0.5 to 5 parts by weight of the reinforcing fiber with respect to 100 parts by weight of cement in the mixture. By comprising in this way, the reinforcement structure by the entanglement of the reinforcing fiber contained in a dispersion | distribution state in a molded object is formed, and the strength rigidity of a lightweight cement board can be improved. The reinforcing fiber is preferably polyvinyl alcohol fiber, that is, vinylon. The fiber length of the reinforcing fiber is preferably in the range of 4 to 35 mm.
前記複合パネル材として、枠状フレームの内面側及び外面側に軽量セメント板を設けたものを用いることもできる。この場合には、複合パネル材を閉断面構造に構成できるので、その強度剛性を一層向上することができる。   As the composite panel material, a frame-shaped frame provided with lightweight cement boards on the inner surface side and outer surface side can also be used. In this case, since the composite panel material can be configured in a closed cross-sectional structure, its strength and rigidity can be further improved.
前記複合パネル材として、内面側及び外面側の軽量セメント板間に発泡合成樹脂からなる補強材を積層状に設けたものを用いることもできる。この場合には、外面側の軽量セメント板に作用する土圧を補強材及び内面側の軽量セメント板で受け止めることができる。   As the composite panel material, a laminate in which a reinforcing material made of foamed synthetic resin is provided between the light-weight cement boards on the inner surface side and the outer surface side can also be used. In this case, the earth pressure acting on the light weight cement board on the outer surface side can be received by the reinforcing material and the light weight cement board on the inner surface side.
前記枠状フレームの側端面に軽量セメント板を取り付け、複合パネル材の外面全面を軽量セメント板で被覆することも好ましい実施の形態である。この場合には、複合パネル材の外面全面が軽量セメント板で被覆されるので、枠状フレームの腐食を確実に防止できるとともに、枠状フレームが露出することによる地中埋設箱の外観低下を防止することができる。   It is also a preferred embodiment that a lightweight cement plate is attached to the side end surface of the frame-like frame, and the entire outer surface of the composite panel material is covered with the lightweight cement plate. In this case, since the entire outer surface of the composite panel material is covered with a lightweight cement board, corrosion of the frame-shaped frame can be surely prevented, and deterioration of the appearance of the underground buried box due to exposure of the frame-shaped frame can be prevented. can do.
前記上面パネルと側面パネルの上端部との結合部と、底面パネルと側面パネルの下端部との結合部に、両パネルの位置決め結合用の凹凸嵌合部を形成することも好ましい実施の形態である。このように凹凸嵌合部により上下のパネルと側面パネルとを連結すると、底面パネルに対する側面パネルの位置決めが容易になるとともに、両パネルの結合強度を向上することができる。また、側面パネルに対する上面パネルの位置決めが容易になるとともに、両パネルの結合強度を向上でき、地中埋設箱の組立作業を全体として効率的に行うことが可能となる。また、接着剤やボルトや釘等を用いることなく、凹凸嵌合のみによりパネル同士を結合できるように構成することも可能なので、パネルの組立性を格段に向上できる。   In a preferred embodiment, it is also preferable to form an uneven fitting portion for positioning and coupling the two panels at the coupling portion between the top panel and the upper end portion of the side panel and the coupling portion between the bottom panel and the lower end portion of the side panel. is there. When the upper and lower panels and the side panel are connected by the concave / convex fitting portion in this manner, the positioning of the side panel with respect to the bottom panel is facilitated, and the coupling strength between the two panels can be improved. Further, the positioning of the upper surface panel with respect to the side surface panel is facilitated, the joint strength between the two panels can be improved, and the assembly work of the underground box can be efficiently performed as a whole. Further, since it is possible to configure the panels so that the panels can be coupled only by uneven fitting without using an adhesive, bolts, nails, or the like, the assemblability of the panels can be significantly improved.
前記隣接するパネル間に防水材を介装することが好ましい実施の形態である。このように構成することで、地中埋設箱内への雨水の浸入を防止することができる。   It is a preferred embodiment that a waterproof material is interposed between the adjacent panels. By comprising in this way, the infiltration of rain water into the underground box can be prevented.
前記軽量セメント板の外面に防水層を一体的に設けることもこのまし実施の形態である。このように構成すると、地中埋設箱内への雨水の浸入を一層効果的に防止することができる。   It is also a preferred embodiment to provide a waterproof layer integrally on the outer surface of the lightweight cement board. If comprised in this way, invasion of rainwater into the underground burial box can be prevented more effectively.
前記地中埋設箱の底部に外方へ突出して、地下水圧による地中埋設箱の浮上を防止する棒状や板状のアンカー材を埋設状に設けることが好ましい実施の形態である。本発明の地中埋設箱は軽量であることから、大雨などにより地下水位が上昇すると浮上することが考えられる。このため本発明のようにアンカー材を設けることで、これを防止することが好ましい。   In a preferred embodiment, a bar-like or plate-like anchor material that protrudes outward at the bottom of the underground burial box and prevents the underground burial box from floating due to underground water pressure is provided in the burial form. Since the underground burial box of the present invention is lightweight, it can be considered that the underground box rises when the groundwater level rises due to heavy rain or the like. For this reason, it is preferable to prevent this by providing an anchor material as in the present invention.
本発明に係る地中埋設箱によれば、地中埋設箱を構成する6枚のパネルを予め工場等において製作して、地中埋設箱をパネルの状態で工場等に保管し、必要に応じてパネルの状態で施工現場へ輸送できるので、工場での保管スペースを小さくでき、しかも現場への輸送時に、大型車での搬入が不要で、輸送コストを削減できる。また、施工現場では、パネルを結合して組み立てるだけでよいので、現場における施工作業を大幅に軽減できる。更に、側面パネルとして用いる複合パネル材は、枠状フレームの少なくとも表面側に軽量セメント板を取り付けたものなので、人手により容易に持ち運びが可能な重さに構成しつつ、枠状フレームにより上載荷重を効果的に受け止め得る十分な強度剛性を確保できる。しかも、鉄筋コンクリート製の地中埋設箱と比較して、大きさの異なる複合パネル材を容易に製作できるので、特殊サイズの地中埋設箱にも容易に対応でき、しかも養生時間が不要で、各サイズのキットを在庫することにより、受注から出荷までの納期を短縮することができる。また、軽量セメント板は、加工性が良いので、例えば現場において側面パネルの任意の位置にダクト口を形成することが可能となる。尚、底面パネル及び上面パネルに関しても、側面パネルと同様に、複合パネル材で構成することができる。   According to the underground burial box according to the present invention, six panels constituting the underground burial box are produced in advance in a factory or the like, and the underground burial box is stored in the factory or the like in the state of the panel. Since the panel can be transported to the construction site, the storage space in the factory can be reduced, and when transporting to the site, it is not necessary to carry in a large vehicle and the transportation cost can be reduced. In addition, at the construction site, it is only necessary to combine and assemble the panels, so that the construction work at the site can be greatly reduced. Furthermore, since the composite panel material used as the side panel has a lightweight cement board attached to at least the surface side of the frame-shaped frame, it is constructed to have a weight that can be easily carried by hand, and the upper load is applied by the frame-shaped frame. Sufficient strength and rigidity that can be effectively received can be secured. In addition, composite panel materials with different sizes can be easily manufactured compared to underground reinforced concrete underground boxes, which can easily accommodate special-size underground underground boxes and does not require curing time. By stocking kits of the size, the delivery time from order receipt to shipment can be shortened. Further, since the lightweight cement board has good workability, for example, a duct port can be formed at an arbitrary position of the side panel at the site. Note that the bottom panel and the top panel can also be made of a composite panel material, similarly to the side panel.
以下、本発明の実施の形態について図面を参照しながら説明する。
図1〜図3に示すように、ハンドホールやマンホールなどの地中埋設箱10は、底面パネル11Lと、上面パネル11Uと、4つの側面パネル11Sを備え、6枚のパネル11を結合することによって立方体状に組み立てられている。より具体的には、地中埋設箱10の施工位置に地盤を掘削し、掘削孔内において6枚のパネル11を結合して地中埋設箱10を組み立て、この地中埋設箱10に図示外の地中埋設管を接続するなどの施工作業を行った後、掘削孔を埋め戻すことにより、地中に埋設状に施工されている。但し、地中埋設箱10の形状は、本実施の形態では立方体状としたが、直方体状やその他の形状に形成することもできる。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the underground box 10 such as a handhole or a manhole includes a bottom panel 11 </ b> L, a top panel 11 </ b> U, and four side panels 11 </ b> S, and combines six panels 11. Is assembled into a cube. More specifically, the ground is excavated at the construction position of the underground burial box 10 and the underground panel 10 is assembled by joining the six panels 11 in the excavation hole. After performing construction work such as connecting underground pipes, the excavation holes are backfilled, so that they are constructed underground. However, although the underground box 10 has a cubic shape in the present embodiment, it may be formed in a rectangular parallelepiped shape or other shapes.
上面パネル11Uの中央部には上部開口部12が形成され、上面パネル11U上には上部開口部12の口縁に沿ったリング部13aを有する蓋枠13が取り付けられ、蓋枠13のリング部13aには蓋部材14が開閉自在に取り付けられ、この蓋部材14を開放することによって、地中埋設箱10内における地中埋設管のケーブルや電線等を点検できるように構成されている。   An upper opening 12 is formed at the center of the upper panel 11U, and a lid frame 13 having a ring portion 13a along the lip of the upper opening 12 is attached to the upper panel 11U. A lid member 14 is attached to 13a so as to be openable and closable. By opening the lid member 14, the cable and electric wire of the underground pipe in the underground box 10 can be inspected.
側面パネル11Sには、図1に仮想線で示すように、図示外の地中埋設管が挿通するダクト口15が形成されている。このダクト口15は、予め工場等において形成することも可能であるが、本発明では側面パネル11Sの加工性が良いことから、施工現場において形成することになる。   The side panel 11S is formed with a duct port 15 through which an underground pipe (not shown) is inserted, as indicated by a virtual line in FIG. The duct port 15 can be formed in advance in a factory or the like. However, in the present invention, the side panel 11S has good workability, so it is formed at a construction site.
隣接するパネル11は、接着剤やボルトやビスなどで結合することができるが、それ以外の手段で結合することも可能で、次に説明する凹凸嵌合だけで一体的に結合することも可能である。また、隣接するパネル11間にはブチルゴムなどからなる防水材(図示略)が介装され、パネル11間の隙間から地中埋設箱10内への雨水等の浸入を防止できるように構成されている。   Adjacent panels 11 can be joined with adhesives, bolts, screws, etc., but they can also be joined by other means, and can be joined together only by uneven fitting described below. It is. Further, a waterproof material (not shown) made of butyl rubber or the like is interposed between adjacent panels 11 so that rainwater and the like can be prevented from entering the underground burial box 10 through the gap between the panels 11. Yes.
地中埋設箱10の組立性を向上するため、各側面パネル11Sと底面パネル11L間には凹凸嵌合により両者を位置決めして結合可能な下部凹凸嵌合部16L、17Lが形成され、また各側面パネル11Sと上面パネル11U間には凹凸嵌合により両者を位置決めして結合可能な上部凹凸嵌合部16U、17Uが形成されている。具体的には、4枚の側面パネル11Sの底面の両端部には1対の嵌合凹部16Lが形成され、また底面パネル11Lの上面の側部に嵌合凹部16Lに対応させて嵌合凸部17Lが上方へ突出状に形成され、4枚の側面パネル11Sは、1対の嵌合凹部16Lを底面パネル11Lの1対の嵌合凸部17Lにそれぞれ嵌合させて、底面パネル11Lの側部に角筒状に組み付けられている。また、側面パネル11Sの上面の中央部には1つの嵌合凸部17Uが上方へ突出状に形成され、上面パネル11Uの下面の側部には嵌合凸部17Uに対応させて嵌合凹部16Uが形成され、上面パネル11Uは、その嵌合凹部16Uを側面パネル11Sの嵌合凸部17Uに嵌合させることによって、4枚の側面パネル11S上に位置決め固定されている。尚、下部凹凸嵌合部16L、17L及び上部凹凸嵌合部16U、17Uの個数や形成位置や形状等は任意に設定可能である。また、下部凹凸嵌合部16L、17L及び上部凹凸嵌合部16U、17Uは、必ずしも設ける必要はなく、少なくとも一方は省略することが可能である。また、嵌合凸部と嵌合凹部とを節度感を持って凹凸嵌合させることも可能で、例えば嵌合凹部16L、16Uを嵌合凸部17L、17Uの適正位置まで嵌合させた状態で、カチット音がして、抜け方向への移動が規制されるように構成したものを好適に採用できる。   In order to improve the assembling property of the underground box 10, lower concave and convex fitting portions 16L and 17L are formed between the side panels 11S and the bottom panel 11L by positioning and coupling the concave and convex portions. Upper concavo-convex fitting portions 16U and 17U are formed between the side panel 11S and the upper surface panel 11U. Specifically, a pair of fitting recesses 16L are formed at both ends of the bottom surfaces of the four side panels 11S, and the fitting protrusions corresponding to the fitting recesses 16L are formed on the side portions of the top surface of the bottom panel 11L. A portion 17L is formed so as to protrude upward, and the four side panels 11S have a pair of fitting recesses 16L fitted to a pair of fitting projections 17L of the bottom panel 11L, respectively. The side part is assembled in a square tube shape. Further, one fitting convex portion 17U is formed so as to protrude upward at the center portion of the upper surface of the side panel 11S, and a fitting concave portion corresponding to the fitting convex portion 17U is formed on the side portion of the lower surface of the upper surface panel 11U. 16U is formed, and the top panel 11U is positioned and fixed on the four side panels 11S by fitting the fitting recess 16U to the fitting projection 17U of the side panel 11S. In addition, the number, formation position, shape, etc. of lower uneven | corrugated fitting part 16L, 17L and upper uneven | corrugated fitting part 16U, 17U can be set arbitrarily. Further, the lower uneven fitting portions 16L and 17L and the upper uneven fitting portions 16U and 17U are not necessarily provided, and at least one of them can be omitted. In addition, it is possible to fit the projections and recesses in a concave-convex manner with a sense of moderation. For example, the fitting recesses 16L and 16U are fitted to the proper positions of the fitting projections 17L and 17U. Thus, it is possible to suitably employ a configuration in which a clicking sound is generated and movement in the removal direction is restricted.
底面パネル11Lと上面パネル11Uと4つの側面パネル11Sとは複合パネル材で構成されている。この複合パネル材は、図3〜図6に示すように、枠状フレーム20の外面側及び内面側に軽量セメント板21A、21Bを取り付け、両軽量セメント板21A、21B間に発泡合成樹脂からなる補強材22を積層状に設け、枠状フレーム20の側端面に軽量セメント板21Cを取り付けて、枠状フレーム20及び補強材22を軽量セメント板21で全体的に被覆したものである。   The bottom panel 11L, the top panel 11U, and the four side panels 11S are composed of a composite panel material. As shown in FIGS. 3 to 6, the composite panel material has lightweight cement plates 21 </ b> A and 21 </ b> B attached to the outer surface side and the inner surface side of the frame-shaped frame 20, and is made of a foamed synthetic resin between both lightweight cement plates 21 </ b> A and 21 </ b> B. The reinforcing material 22 is provided in a laminated form, a lightweight cement plate 21C is attached to the side end surface of the frame-shaped frame 20, and the frame-shaped frame 20 and the reinforcing material 22 are entirely covered with the lightweight cement plate 21.
6枚のパネル11を複合パネル材で構成することが最も好ましいが、少なくとも4枚の側面パネル11Sを複合パネル材で構成してあれば、底面パネル11L又は上面パネル11Uは、鉄筋コンクリートパネルやプレキャストコンクリート板で構成することも可能である。また、軽量セメント板21は、複合パネル材の外面全面を覆うように設けることが、枠状フレーム20の腐食を防止する上で好ましいが、枠状フレーム20の少なくとも外面側の軽量セメント板21Aが設けてあれば、内面側の軽量セメント板21B及び/又は側端面の軽量セメント板21Cは省略することも可能である。   It is most preferable that the six panels 11 are composed of composite panel materials. However, if at least four side panels 11S are composed of composite panel materials, the bottom panel 11L or the top panel 11U may be a reinforced concrete panel or precast concrete. It is also possible to configure with a plate. The lightweight cement plate 21 is preferably provided so as to cover the entire outer surface of the composite panel material in order to prevent corrosion of the frame-shaped frame 20, but the lightweight cement plate 21A on at least the outer surface side of the frame-shaped frame 20 is provided. If provided, the light-weight cement plate 21B on the inner surface side and / or the light-weight cement plate 21C on the side end surface may be omitted.
枠状フレーム20は、鉄やステンレスなどの鋼材からなるロ字状断面の4本のフレーム構成材23を、溶接やビス止めや例えばL型の金具等を用いて、地中埋設箱10に形状に応じた長方形や正方形などの枠状に連結したものである。フレーム構成材23としては、C型断面やH型断面、コ字状断面の鋼材を採用することも可能である。また、断面形状の異なるフレーム構成材23を任意に組み合わせて枠状フレーム20を構成することも可能である。   The frame-shaped frame 20 is formed by forming four frame components 23 having a square-shaped cross section made of steel such as iron or stainless steel into the underground box 10 using welding, screwing, or an L-shaped metal fitting, for example. It is connected to a frame shape such as a rectangle or a square according to. As the frame constituent material 23, a steel material having a C-shaped cross section, an H-shaped cross section, or a U-shaped cross section may be employed. Further, the frame-shaped frame 20 can be configured by arbitrarily combining the frame components 23 having different cross-sectional shapes.
フレーム構成材23の断面寸法は、地中埋設箱10に作用する上載荷重に耐え得るように適宜に設定され、例えば内寸800mmの立方体状の地中埋設箱10においては、50×50mmの角型で厚さが15mmのロ字状断面の鋼製のフレーム構成材23を採用できる。   The cross-sectional dimension of the frame constituent material 23 is appropriately set so as to be able to withstand the overload applied to the underground box 10. For example, in a cubic underground box 10 having an inner dimension of 800 mm, a corner of 50 × 50 mm A steel frame constituent material 23 having a square cross section with a thickness of 15 mm can be employed.
嵌合凹部16L、16Uは、例えば略円柱状の金属材料で構成され、枠状フレーム20に溶接等により一体的に設けられ、軽量セメント板21に形成した貫通孔21aを貫通して、底面パネル11L外や側面パネル11S外へ突出状に設けられている。嵌合凸部17L、17Uは、軽量セメント板21に形成された貫通孔21bと枠状フレーム20に形成された貫通孔20bとで構成されている。嵌合凹部16L、16Uの軽量セメント板21からの突出長さは軽量セメント板21の厚さよりも大きく設定され、嵌合凹部16L、16Uが金属製の枠状フレーム20の貫通孔20bに嵌合することで、上面パネル11U及び底面パネル11Lと側面パネル11Sとの結合強度が高められるように構成されている。   The fitting recesses 16L and 16U are made of, for example, a substantially columnar metal material, and are integrally provided on the frame-shaped frame 20 by welding or the like, and pass through a through-hole 21a formed in the lightweight cement plate 21 to form a bottom panel. It protrudes outside 11L and outside the side panel 11S. The fitting convex portions 17L and 17U are constituted by a through hole 21b formed in the lightweight cement plate 21 and a through hole 20b formed in the frame-like frame 20. The protruding lengths of the fitting recesses 16L and 16U from the lightweight cement plate 21 are set to be larger than the thickness of the lightweight cement plate 21, and the fitting recesses 16L and 16U are fitted into the through holes 20b of the metal frame frame 20. By doing so, the coupling strength between the top panel 11U and the bottom panel 11L and the side panel 11S is increased.
枠状フレーム20と軽量セメント板21とは、接着剤や特殊樹脂発泡剤、ボルトやビスなどで結合することができるが、それ以外の手段で結合することも可能である。また、枠状フレーム20と軽量セメント板21間にブチルゴムなどからなる防水材(図示略)を介装して、複合パネル材内への雨水等の浸入を防止することも好ましい実施の形態である。   The frame-shaped frame 20 and the lightweight cement board 21 can be bonded by an adhesive, a special resin foaming agent, bolts, screws, or the like, but can also be bonded by other means. It is also a preferred embodiment that a waterproof material (not shown) made of butyl rubber or the like is interposed between the frame-shaped frame 20 and the lightweight cement board 21 to prevent intrusion of rainwater or the like into the composite panel material. .
外面側と内面側の軽量セメント板21A、21B間には発泡合成樹脂からなる補強材22を積層状に設けられ、この補強材22を介して外面側の軽量セメント板21Aに作用する土圧を内面側の軽量セメント板21Bでも吸収できるように構成されている。補強材22を構成する発泡合成樹脂は特に限定されるものではないが、例えばポリスチレンフォーム、ポリエチレンフォーム、硬質ポリウレタンフォーム、軟質ポリウレタンフォーム、硬質塩化ビニルフォーム、ユリアフォーム、フェノールフォーム、アクリルフォーム、酢酸セルロースフォーム、その他の発泡合成樹脂が例示できる。枠状フレーム20及び軽量セメント板21と補強材22とは、接着剤により接着して一体化することが好ましいが、単に嵌め込んで設けることも可能であるし、釘打ち可能な低発泡樹脂などで構成する場合には、ボルトやビスや釘などで結合することも可能である。また、枠状フレーム20の一方の面に軽量セメント板21を固定した状態で、枠状フレーム20内に発泡合成樹脂材料を注入し、その後他方の軽量セメント板21を取り付けて、枠状フレーム20と2枚の軽量セメント板21とを発泡合成樹脂からなる補強材22で一体化させることも可能である。特に、自己接着性を有する発泡合成樹脂材料を用いると、枠状フレーム20と2枚の軽量セメント板21との結合強度を容易に向上できるので好ましい。   A reinforcing material 22 made of foamed synthetic resin is provided between the outer surface side and the inner surface side lightweight cement plates 21A, 21B, and earth pressure acting on the outer surface side lightweight cement plate 21A is provided via the reinforcing material 22. The light-weight cement board 21B on the inner surface side can also be absorbed. The foamed synthetic resin constituting the reinforcing material 22 is not particularly limited. For example, polystyrene foam, polyethylene foam, rigid polyurethane foam, flexible polyurethane foam, rigid vinyl chloride foam, urea foam, phenol foam, acrylic foam, cellulose acetate Examples thereof include foams and other foamed synthetic resins. The frame-shaped frame 20 and the lightweight cement board 21 and the reinforcing member 22 are preferably bonded and integrated with an adhesive, but can be simply fitted and provided, such as a low-foam resin that can be nailed. In the case of comprising, it is also possible to couple with bolts, screws, nails or the like. Further, in a state where the lightweight cement plate 21 is fixed to one surface of the frame-shaped frame 20, the foamed synthetic resin material is injected into the frame-shaped frame 20, and then the other lightweight cement plate 21 is attached. It is also possible to integrate the two lightweight cement plates 21 with a reinforcing material 22 made of foamed synthetic resin. In particular, it is preferable to use a foamed synthetic resin material having self-adhesive properties because the bonding strength between the frame-shaped frame 20 and the two lightweight cement plates 21 can be easily improved.
軽量セメント板21の厚さは土圧に耐え得る任意の厚さに設定することができ、例えば内寸800mmの立方体状の地中埋設箱10では、外面側と内面側の軽量セメント板21A、21Bの厚さをそれぞれ15mmに設定することができる。   The thickness of the lightweight cement board 21 can be set to an arbitrary thickness that can withstand earth pressure. For example, in the cubic underground box 10 having an inner dimension of 800 mm, the lightweight cement boards 21A on the outer surface side and the inner surface side are provided. Each thickness of 21B can be set to 15 mm.
軽量セメント板21としては、セメント、水、補強繊維及び起泡剤をプレフォームした泡を混練した混練物を、密閉したセメント用成形型内に充填し、養生固化した多孔質成形体からなり、該成形体中に前記補強繊維及び泡を分散状態で含有してなり、比重が0.5〜1.0の範囲内であるものを好適に採用できる。このような構成の軽量セメント板21は、鋸等の簡易な工具で容易に加工することができ、現場合わせでの寸法調整も容易なので、製造時や組付時における取扱性を向上できる。また、軽量セメント板21を多孔質成形体で構成しているので、軽量セメント板21の断熱性及び保温性を一層向上することができ、しかも極力軽量に構成することができる。また、軽量セメント板21は、それに分散状態で含有した補強繊維の絡み合いにより補強された構造を有することから、曲げ弾性係数が、例えば1700N/mm2以上と高強度であるし、釘打ち等も可能なものなので施工性を向上できる。 The lightweight cement board 21 is composed of a porous molded body filled with a kneaded mixture of cement, water, reinforcing fiber and foam pre-formed with a foaming agent in a closed cement molding die and cured and solidified. A molded article containing the reinforcing fibers and bubbles in a dispersed state and having a specific gravity in the range of 0.5 to 1.0 can be suitably employed. The lightweight cement board 21 having such a configuration can be easily processed with a simple tool such as a saw and can be easily adjusted in the field, so that the handling at the time of manufacture and assembly can be improved. Moreover, since the lightweight cement board 21 is comprised with the porous molded object, the heat insulation and heat retention of the lightweight cement board 21 can be improved further, and also it can comprise as lightweight as possible. Further, since the lightweight cement board 21 has a structure reinforced by entanglement of reinforcing fibers contained in a dispersed state, the flexural modulus is high strength, for example, 1700 N / mm 2 or more, and nailing and the like are also performed. Since it is possible, workability can be improved.
また、軽量セメント板21は、多孔質成形体で構成されているので、その表面には多数の凹部が形成される。このため、軽量セメント板21の製作後、パテ等で凹部を埋めた後、塗装を施して用いることになる。また、軽量セメント板21の少なくとも外面側の表面に保護層を設けて、防水性を高めるように構成することも可能である。保護層を設ける方法には特に限定はないが、例えば、軽量セメント板21の表面に合成樹脂製のフィルム、シート又はボードを接着する方法、軽量セメント板21の表面に合成樹脂を塗布する方法などが挙げられる。前記合成樹脂としては、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、ポリエチレンテレフタレート等のポリエステル系樹脂の他、ABS、MMA等が挙げられる。これらの合成樹脂からなるフィルム、シート又はボードを軽量セメント板21の表面に接着する方法としては、成形された軽量セメント板21の表面に接着剤を用いて接着する方法、軽量セメント板21を成形する際に、軽量セメント板21を構成する軽量セメントにより合成樹脂フィルム、シート又はボードを、直接、軽量セメント板21に接着する方法が挙げられる。   Moreover, since the lightweight cement board 21 is comprised with the porous molded object, many recessed parts are formed in the surface. For this reason, after manufacturing the lightweight cement board 21, after filling a recessed part with putty etc., it coats and uses. Moreover, it is also possible to provide a protective layer on at least the outer surface of the lightweight cement board 21 so as to enhance the waterproof property. The method for providing the protective layer is not particularly limited. For example, a method of adhering a synthetic resin film, sheet or board to the surface of the lightweight cement plate 21, a method of applying a synthetic resin to the surface of the lightweight cement plate 21, etc. Is mentioned. Examples of the synthetic resin include ABS, MMA and the like in addition to polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate. As a method of adhering a film, sheet or board made of these synthetic resins to the surface of the lightweight cement board 21, a method of adhering to the surface of the molded lightweight cement board 21 using an adhesive, or molding the lightweight cement board 21 is performed. In this case, there is a method in which a synthetic resin film, a sheet, or a board is directly bonded to the lightweight cement board 21 with the lightweight cement constituting the lightweight cement board 21.
前記セメントは特に限定されず、普通ポルトランドセメント、早強ポルトランドセメント、超早強ポルトランドセメント等、各種セメントを使用できる。これらのなかでも、生産性、強度等の点から早強ポルトランドセメントが好ましい。   The cement is not particularly limited, and various cements such as ordinary Portland cement, early-strength Portland cement, and ultra-early-strength Portland cement can be used. Among these, early-strength Portland cement is preferable in terms of productivity, strength, and the like.
セメントと水との配合割合は、セメント100重量部に対して水が20〜100重量部、更には20〜50重量部の範囲が好ましい。水が多すぎると強度が低下する傾向にあり、水が少なすぎると成形時にセメント混練物の流動性が低下して成形性を阻害する傾向にある。   The blending ratio of cement and water is preferably in the range of 20 to 100 parts by weight, more preferably 20 to 50 parts by weight of water with respect to 100 parts by weight of cement. If there is too much water, the strength tends to decrease, and if there is too little water, the fluidity of the cement kneaded product at the time of molding tends to deteriorate and the moldability tends to be impaired.
前記補強繊維としては、ポリビニルアルコール繊維(ビニロン)、ポリプロピレン繊維やポリエチレン繊維等のポリオレフィン系繊維、アラミド繊維、炭素繊維、鋼繊維、ガラス繊維等が挙げられる。これらの繊維のなかでも、ビニロン繊維は耐久性が高く、しかもセメントとの親和性に優れるので好ましい。補強繊維の繊維長は特に限定されないが、4〜35mmの範囲が好ましい。補強繊維の繊維長が4mm未満では補強効果が不足する傾向がみられる。補強繊維の繊維長が長い方が補強効果の点では有利であるが、その一方で、繊維長が長くなるほど分散性が低下し、成形体内で補強繊維が偏在して、かえって軽量セメント板21の強度を低下させる場合もある。また、補強繊維の太さにも特に限定はないが、通常、10μm〜100μmのものが用いられる。   Examples of the reinforcing fibers include polyvinyl alcohol fibers (vinylon), polyolefin fibers such as polypropylene fibers and polyethylene fibers, aramid fibers, carbon fibers, steel fibers, and glass fibers. Among these fibers, vinylon fibers are preferable because of their high durability and excellent affinity with cement. The fiber length of the reinforcing fiber is not particularly limited, but is preferably in the range of 4 to 35 mm. If the fiber length of the reinforcing fiber is less than 4 mm, the reinforcing effect tends to be insufficient. A longer reinforcing fiber length is advantageous in terms of reinforcing effect. On the other hand, the longer the fiber length, the lower the dispersibility, and the reinforcing fibers are unevenly distributed in the molded body. The strength may be reduced. Moreover, although there is no limitation in particular also in the thickness of a reinforcing fiber, a thing of 10 micrometers-100 micrometers is used normally.
前記軽量セメント板21は、セメント混練時にビニロンやガラスチョップ等の補強繊維を均一に分散させるだけで、補強繊維の絡み合いによる補強構造が得られる。従って、軽量セメント板21の製造に際して、網状補強材等の補強材を埋設する場合の位置決め操作等の煩雑な作業も不要で、強度にバラツキのない軽量セメント板21を容易に製造できる。   The lightweight cement board 21 can obtain a reinforcing structure by entanglement of reinforcing fibers only by uniformly dispersing reinforcing fibers such as vinylon and glass chop during kneading of the cement. Therefore, when the lightweight cement board 21 is manufactured, a complicated operation such as a positioning operation when embedding a reinforcing material such as a net-like reinforcing material is unnecessary, and the lightweight cement board 21 having no variation in strength can be easily manufactured.
補強繊維の配合量は、前記セメント100重量部に対して0.5〜5重量部とすることが好ましい。補強繊維の配合量が少ないと、補強効果も低く、軽量セメント板21の強度も低くなる。補強繊維の配合量が多いほど軽量セメント板21の補強効果においては有利であるものの、補強繊維の配合量が過剰であるとセメント混練物中での分散性が悪くなり、補強繊維が偏在して、軽量セメント板21の強度が不均一になり、かえって軽量セメント板21の強度を低下させるおそれがある。このような観点から、補強繊維の配合量のより好ましい範囲は、セメント100重量部に対して0.5〜3重量部である。   The blending amount of the reinforcing fiber is preferably 0.5 to 5 parts by weight with respect to 100 parts by weight of the cement. When the amount of the reinforcing fiber is small, the reinforcing effect is low and the strength of the lightweight cement board 21 is also low. Although the greater the amount of reinforcing fibers, the more advantageous the reinforcing effect of the lightweight cement board 21 is, the excessive amount of reinforcing fibers results in poor dispersibility in the cement kneaded material, and the reinforcing fibers are unevenly distributed. In addition, the strength of the lightweight cement plate 21 becomes non-uniform, and there is a possibility that the strength of the lightweight cement plate 21 is lowered. From such a viewpoint, the more preferable range of the compounding amount of the reinforcing fiber is 0.5 to 3 parts by weight with respect to 100 parts by weight of cement.
前記起泡剤は特に限定されず、セメント用、コンクリート用の起泡剤、例えば、タンパク質系、界面活性剤系、樹脂系等の公知の各種の起泡剤を使用できる。更に、前記起泡剤とともに、アルミニウム粉等の金属系発泡剤を使用することもできる。起泡剤の添加量や添加方法は特に限定されないが、通常はセメント100重量部に対して0.1〜3重量部の範囲で、得られる軽量セメント板21の比重が、1.0以下の、目標値となるように適宜調整すればよい。軽量セメント板21の比重は、好ましくは0.5〜1.0であり、更に好ましくは0.6〜0.9の範囲、特に好ましくは木質合板と同じ0.7〜0.8程度である。比重が小さいほど軽量セメント板21は軽量となり、取り扱い性の面では有利である。しかし、比重が小さくなるほど気孔率が大きくなり、軽量セメント板21の強度が低下する。一方、比重が大きくなるほど軽量セメント板21が重くなり、取り扱い性が低下する。   The foaming agent is not particularly limited, and various well-known foaming agents such as a protein-based, surfactant-based, and resin-based foaming agents can be used. Furthermore, metal foaming agents such as aluminum powder can be used together with the foaming agent. Although the addition amount and addition method of a foaming agent are not specifically limited, Usually, the specific gravity of the obtained lightweight cement board 21 is 1.0 or less in the range of 0.1-3 weight part with respect to 100 weight part of cement. The adjustment may be made as appropriate so that the target value is obtained. The specific gravity of the lightweight cement board 21 is preferably 0.5 to 1.0, more preferably in the range of 0.6 to 0.9, and particularly preferably about 0.7 to 0.8, which is the same as the wood plywood. . The smaller the specific gravity, the lighter the cement board 21 becomes, and this is advantageous in terms of handling. However, as the specific gravity decreases, the porosity increases and the strength of the lightweight cement board 21 decreases. On the other hand, as the specific gravity increases, the lightweight cement board 21 becomes heavier, and the handleability decreases.
前記セメント、水、補強繊維及び起泡剤をプレフォームした泡、その他の添加剤等からなる混練物の混練に際しては、従来公知のセメントミキサーやコンクリートミキサーなどを使用できるが、混練物中の起泡剤をプレフォームした泡(気泡)の状態や補強繊維にダメージを与えることなく、かつ全体を均一に混練することが必要である。混練時に起泡剤の泡(気泡)がダメージを受けると、成形後の軽量セメント板21における気泡の大きさが不均一となり、軽量セメント板21強度にバラツキが生じることがある。また、補強繊維がダメージを受けると折損して所期の補強効果が得られないおそれがある。   In kneading a kneaded material composed of the above-mentioned cement, water, foams pre-formed with a reinforcing fiber and a foaming agent, and other additives, a conventionally known cement mixer or concrete mixer can be used. It is necessary to uniformly knead the whole without damaging the foam (bubbles) pre-formed with the foaming agent and the reinforcing fibers. If the foam (bubbles) of the foaming agent is damaged during the kneading, the size of the bubbles in the light-weight cement board 21 after molding becomes uneven, and the strength of the light-weight cement board 21 may vary. Further, if the reinforcing fiber is damaged, it may break and the desired reinforcing effect may not be obtained.
軽量セメント板21は、上記のようなセメント、水、補強繊維および起泡剤をプレフォームした泡を混練し、成形型に充填して使用目的に応じた大きさの板状に成形するか、又はそれより大きなブロック状に成形した後、養生することで、気泡を含んだセメントミルクが、セメントと水との水和反応により硬化して、補強繊維と多数の気泡を分散状態で含有する軽量な多孔質成形体が得られる。   The lightweight cement board 21 is prepared by kneading foam formed by cement, water, reinforcing fiber and foaming agent as described above, and filling the mold into a plate having a size according to the purpose of use. Or, after forming into a larger block shape and curing, the cement milk containing bubbles hardens by the hydration reaction between the cement and water, and it contains reinforcing fibers and many bubbles in a dispersed state A porous molded body can be obtained.
軽量セメント板21の具体的な製造法の一例を挙げると、セメントに水及び減水剤を混合し、これに補強繊維を加えて混練する。一方、起泡剤に空気を導入し、所定の倍率、例えば20倍程度にプレフォームする。この起泡剤をプレフォームした泡を、前記混練物に加えて混練する。なお、混練の途中で混練物の比重を適宜測定し、目標値に近づけるよう、起泡剤をプレフォームした泡を更に追加して混練してもよい。このセメント混練物を、例えば、金属製の耐圧成形型に充填し、例えば930mm(幅)×930mm(長さ)×15mm(厚)の板状に成形し、これを養生、固化させる。これにより、多孔質成形体からなる底面パネル11L用の軽量セメント板21が得られる。また、大きなブロック状に成形した多孔質成形体を、養生固化した後、所望の厚さ、大きさの板状に切り出して、軽量セメント板21を得るようにしてもよい。なお、養生は、通常の養生でもよいし、蒸気養生でもよいし、両者を組み合わせてもよい。また、養生は成形型内で完了させるのではなく、成形型内で蒸気養生し、ある程度固化した段階、通常は数時間後、型から取り出して更に養生することで、成形型での成形サイクルが短くなり、生産性が向上する。また、内側に補強材22を配置させた状態の枠状フレーム20を成形型内に配置させ、枠状フレーム20と成形型間の隙間にセメント混練物を充填して、複合パネル材の外面全体を覆うように軽量セメント層を積層状に一体的に設けることも可能である。   An example of a specific manufacturing method of the lightweight cement board 21 is as follows. Water and a water reducing agent are mixed with cement, and reinforcing fibers are added thereto and kneaded. On the other hand, air is introduced into the foaming agent and preformed at a predetermined magnification, for example, about 20 times. The foam obtained by preforming the foaming agent is added to the kneaded product and kneaded. In addition, the specific gravity of the kneaded product may be appropriately measured during the kneading, and foam pre-formed with a foaming agent may be further added and kneaded so as to approach the target value. The cement kneaded material is filled in a metal pressure-resistant molding die, for example, and formed into a plate shape of, for example, 930 mm (width) × 930 mm (length) × 15 mm (thickness), and this is cured and solidified. Thereby, the lightweight cement board 21 for the bottom panel 11L which consists of a porous molded object is obtained. Alternatively, the porous molded body formed into a large block shape may be cured and solidified, and then cut into a plate shape having a desired thickness and size to obtain the lightweight cement plate 21. The curing may be ordinary curing, steam curing, or a combination of both. In addition, curing is not completed in the mold, but is steam-cured in the mold, solidified to some extent, usually after several hours, and then cured for further curing. Shorter and more productive. Further, the frame-shaped frame 20 with the reinforcing material 22 disposed on the inside is disposed in the molding die, and a gap between the frame-shaped frame 20 and the molding die is filled with cement kneaded material, so that the entire outer surface of the composite panel material is obtained. It is also possible to integrally provide a lightweight cement layer in a laminated form so as to cover.
地中埋設箱10を施工する際には、先ず、施工部位を掘削した後、基礎砕石を水平に敷均し、転圧する。次に、底面パネル11Lを掘削孔の底面に設置し、側面パネル11Sのブチルゴムの剥離紙を除去した後、底面パネル11Lの嵌合凸部17Lに側面パネル11Sの嵌合凹部16Lを嵌合させて、底面パネル11Lの4辺上に側面パネル11Sを角筒状に順次位置決め固定する。次に、4つの側面パネル11Sの嵌合凸部17Uに上面パネル11Uの下面の嵌合凹部16Uを嵌合させて、側面パネル11S上に上面パネル11Uを位置決め固定する。次に、上面パネル11Uの上面にモルタル又はITボンドを塗布し、その上側に蓋枠13を固定してから、蓋枠13のリング部13aに蓋部材14を嵌合載置する。次に、地中埋設管に対応させて側面パネル11Sにダクト口15を形成し、ダクト口15にベルマウスなどの接続部材を取り付けて、地中埋設管をダクト口15から地中埋設箱10内に導入し、必要な配線を行ってから、掘削孔を埋め戻して、地中埋設箱10を埋設施工することになる。   When constructing the underground burial box 10, first, after excavating the construction site, the ground crushed stone is leveled and rolled. Next, after the bottom panel 11L is installed on the bottom surface of the excavation hole and the release paper of the butyl rubber on the side panel 11S is removed, the fitting recess 16L of the side panel 11S is fitted to the fitting projection 17L of the bottom panel 11L. Then, the side panel 11S is sequentially positioned and fixed in a rectangular tube shape on the four sides of the bottom panel 11L. Next, the fitting concave portions 16U on the lower surface of the upper panel 11U are fitted to the fitting convex portions 17U of the four side panels 11S, and the upper panel 11U is positioned and fixed on the side panel 11S. Next, mortar or IT bond is applied to the upper surface of the upper panel 11U, the lid frame 13 is fixed on the upper side, and then the lid member 14 is fitted and placed on the ring portion 13a of the lid frame 13. Next, a duct port 15 is formed in the side panel 11S so as to correspond to the underground tube, a connecting member such as a bell mouth is attached to the duct port 15, and the underground tube is connected from the duct port 15 to the underground box 10. After being introduced inside and performing necessary wiring, the excavation hole is backfilled and the underground burial box 10 is buried.
尚、地中埋設箱10が地下水で浮上する場合には、図7及び図3に仮想線で示すように、掘削孔の底面に地中埋設箱10よりも平面寸法の大きなアンカー板25を固定し、その上に底面パネル11Lを設置して、底面パネル11Lの枠状フレーム20をスクリュービス等でアンカー板25に固定するか、接着剤で底面パネル11Lをアンカー板25に固定してから、底面パネル11L上に側面パネル11Sを組み付けることになる。アンカー板25としては、合成樹脂板や金属板やセメント板など任意の素材からなるものを採用することがでる。軽量セメント板21で構成することも可能で、この場合には底面パネル11Lの底面側の軽量セメント板21の平面サイズを大きく設定して、地中埋設箱10の浮上を防止するように構成することもできる。アンカー板25の大きさは、地中埋設箱10の重量などに応じて適宜に設定することができる。   When the underground burial box 10 is levitated by groundwater, an anchor plate 25 having a larger plane dimension than that of the underground burial box 10 is fixed to the bottom surface of the excavation hole as shown by phantom lines in FIGS. Then, the bottom panel 11L is installed thereon, and the frame-like frame 20 of the bottom panel 11L is fixed to the anchor plate 25 with a screw screw or the like, or the bottom panel 11L is fixed to the anchor plate 25 with an adhesive, The side panel 11S is assembled on the bottom panel 11L. As the anchor plate 25, a material made of any material such as a synthetic resin plate, a metal plate, or a cement plate can be adopted. The lightweight cement board 21 may be used. In this case, the plane size of the lightweight cement board 21 on the bottom surface side of the bottom panel 11L is set large so that the underground box 10 is prevented from floating. You can also. The size of the anchor plate 25 can be appropriately set according to the weight of the underground box 10 and the like.
このように、この地中埋設箱10では、地中埋設箱10を構成する6枚のパネル11を予め工場等において製作して、地中埋設箱10をパネル11の状態で工場等に保管し、必要に応じてパネル11の状態で施工現場へ輸送できるので、工場での保管スペースを小さくでき、しかも現場への輸送時に、大型車での搬入が不要で、輸送コストを削減できる。また、施工現場では、ボルトや釘や接着剤などにより、パネル11を結合して組み立てるだけでよいので、現場における施工作業を大幅に軽減できる。更に、側面パネル11Sとして用いる複合パネル材は、枠状フレーム20の少なくとも外面側に軽量セメント板21Aを取り付けたものなので、人手により容易に持ち運びが可能な重さに構成しつつ、枠状フレーム20により上載荷重を効果的に受け止め得る十分な強度剛性を確保できる。しかも、鉄筋コンクリート製の地中埋設箱10と比較して、大きさの異なる複合パネル材を容易に製作できるので、特殊サイズの地中埋設箱10にも容易に対応でき、しかも養生時間が不要で、各サイズのキットを在庫することにより、受注から出荷までの納期を短縮することができる。また、軽量セメント板21は、加工性が良いので、例えば現場において側面パネル11Sの任意の位置にダクト口15を容易に形成することが可能となる。   Thus, in this underground burial box 10, six panels 11 constituting the underground burial box 10 are manufactured in advance in a factory or the like, and the underground burial box 10 is stored in the factory or the like in the state of the panel 11. Since it can be transported to the construction site in the state of the panel 11 as required, the storage space in the factory can be reduced, and no large vehicles are required for transportation to the site, thereby reducing transportation costs. Further, at the construction site, it is only necessary to assemble and assemble the panel 11 with bolts, nails, adhesives, etc., so that the construction work at the site can be greatly reduced. Furthermore, since the composite panel material used as the side panel 11S has a lightweight cement plate 21A attached to at least the outer surface side of the frame-shaped frame 20, the frame-shaped frame 20 is configured to have a weight that can be easily carried by hand. As a result, sufficient strength and rigidity that can effectively receive the overload can be secured. Moreover, since composite panel materials of different sizes can be easily manufactured compared to the reinforced concrete underground burial box 10, it can be easily applied to special-sized underground burial boxes 10 and does not require curing time. By stocking kits of each size, the delivery time from order receipt to shipment can be shortened. Moreover, since the lightweight cement board 21 has good workability, the duct port 15 can be easily formed at an arbitrary position of the side panel 11S at the site, for example.
地中埋設箱の斜視図Perspective view of underground burial box 地中埋設箱の分解斜視図Exploded perspective view of underground burial box 地中埋設箱の縦断面図Longitudinal section of underground box 底面パネルの分解斜視図Exploded perspective view of bottom panel 底面パネルの要部を切り欠いた分解斜視図The exploded perspective view which cut off the principal part of the bottom panel 底面パネルの斜視図Perspective view of bottom panel アンカー板を用いた場合の地中埋設箱の分解斜視図Exploded perspective view of underground burial box when anchor plate is used
符号の説明Explanation of symbols
10 地中埋設箱 11 パネル
11L 底面パネル 11S 側面パネル
11U 上面パネル 12 上部開口部
13 蓋枠 13a リング部
14 蓋部材 15 ダクト口
16L 嵌合凹部 17L 嵌合凸部
16U 嵌合凹部 17U 嵌合凸部
20 枠状フレーム 20a 貫通孔
21 軽量セメント板 21A 軽量セメント板
21B 軽量セメント板 21C 軽量セメント板
21a 貫通孔 21b 貫通孔
22 補強材 23 フレーム構成材
25 アンカー板
DESCRIPTION OF SYMBOLS 10 Underground box 11 Panel 11L Bottom panel 11S Side panel 11U Top panel 12 Upper opening part 13 Cover frame 13a Ring part 14 Cover member 15 Duct port 16L Fitting recessed part 17L Fitting convex part 16U Fitting concave part 17U Fitting convex part DESCRIPTION OF SYMBOLS 20 Frame-shaped frame 20a Through-hole 21 Lightweight cement board 21A Lightweight cement board 21B Lightweight cement board 21C Lightweight cement board 21a Through-hole 21b Through-hole 22 Reinforcement material 23 Frame component 25 Anchor board

Claims (12)

  1. 底面パネルと上面パネルと4つの側面パネルとを備え、少なくとも4つの側面パネルとして、枠状フレームの少なくとも外面側に軽量セメント板を取り付けてなる複合パネル材を用いたことを特徴とする地中埋設箱。   An underground embedment comprising a bottom panel, a top panel, and four side panels, and a composite panel material comprising a lightweight cement plate attached to at least the outer surface side of the frame-like frame as at least four side panels. box.
  2. 前記軽量セメント板が、セメント、水、補強繊維及び起泡剤をプレフォームした泡を混練した混練物を、密閉したセメント用成形型内に充填し、養生固化した多孔質成形体からなり、該成形体中に前記補強繊維及び泡を分散状態で含有してなり、比重が0.5〜1.0の範囲内である請求項1記載の地中埋設箱。   The lightweight cement board is composed of a porous molded body in which a kneaded product obtained by kneading foam formed by cement, water, reinforcing fibers and a foaming agent is filled in a closed cement mold and cured and cured. The underground burial box according to claim 1, wherein the molded body contains the reinforcing fibers and bubbles in a dispersed state and has a specific gravity in the range of 0.5 to 1.0.
  3. 前記混連物中に、セメント100重量部に対して、前記補強繊維を0.5〜5重量部を配合してなる請求項2記載の地中埋設箱。   The underground box of Claim 2 formed by mix | blending 0.5-5 weight part of said reinforcement fibers with respect to 100 weight part of cement in the said mixture.
  4. 前記補強繊維がポリビニルアルコール繊維である請求項2又は3記載の地中埋設箱。   The underground burial box according to claim 2 or 3, wherein the reinforcing fibers are polyvinyl alcohol fibers.
  5. 前記補強繊維の繊維長が、4〜35mmの範囲である請求項2〜4のいずれか1項記載の地中埋設箱。   The underground box according to any one of claims 2 to 4, wherein a fiber length of the reinforcing fiber is in a range of 4 to 35 mm.
  6. 前記複合パネル材として、枠状フレームの内面側及び外面側に軽量セメント板を設けたものを用いた請求項1〜5のいずれか1項記載の地中埋設箱。   The underground burial box according to any one of claims 1 to 5, wherein the composite panel material is a frame-shaped frame provided with lightweight cement plates on the inner surface side and outer surface side.
  7. 前記複合パネル材として、内面側及び外面側の軽量セメント板間に発泡合成樹脂からなる補強材を積層状に設けたものを用いた請求項6記載の地中埋設箱。   The underground burial box according to claim 6, wherein the composite panel material is a laminate in which a reinforcing material made of foamed synthetic resin is provided between the lightweight cement plates on the inner surface side and the outer surface side.
  8. 前記枠状フレームの側端面に軽量セメント板を取り付け、複合パネル材の外面全面を軽量セメント板で被覆した請求項6又は7記載の地中埋設箱。   The underground burial box according to claim 6 or 7, wherein a lightweight cement plate is attached to a side end surface of the frame-shaped frame, and the entire outer surface of the composite panel material is covered with the lightweight cement plate.
  9. 前記上面パネルと側面パネルの上端部との結合部と、底面パネルと側面パネルの下端部との結合部に、両パネルの位置決め結合用の凹凸嵌合部を形成した請求項1〜8のいずれか1項記載の地中埋設箱。   Any of Claims 1-8 which formed the uneven | corrugated fitting part for positioning coupling | bonding of both panels in the coupling | bond part of the upper end part of the said upper surface panel and a side panel, and the coupling | bond part of the bottom face part and the lower end part of a side panel. The underground burial box according to claim 1.
  10. 前記隣接するパネル間に防水材を介装した請求項1〜9のいずれか1項記載の地中埋設箱。   The underground burial box according to any one of claims 1 to 9, wherein a waterproof material is interposed between the adjacent panels.
  11. 前記軽量セメント板の外面に防水層を一体的に設けた請求項1〜10のいずれか1項記載の地中埋設箱。   The underground burial box according to any one of claims 1 to 10, wherein a waterproof layer is integrally provided on an outer surface of the lightweight cement board.
  12. 前記地中埋設箱の底部に外方へ突出して、地下水圧による地中埋設箱の浮上を防止するアンカー材を埋設状に設けた請求項1〜11のいずれか1項記載の地中埋設箱。
    The underground burial box according to any one of claims 1 to 11, wherein an anchoring material is provided in an embedded shape so as to protrude outward at the bottom of the underground burial box and prevent the underground burial box from floating due to underground water pressure. .
JP2007136059A 2007-05-22 2007-05-22 Underground box Expired - Fee Related JP4709803B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013150445A (en) * 2012-01-19 2013-08-01 Haneda Concrete Industrial Co Ltd Conduit section of wire common duct and installation structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358276B (en) * 2012-02-28 2018-01-05 昆明普尔顿环保科技股份有限公司 The plastic cable well of reinforcement structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1044281A (en) * 1996-07-31 1998-02-17 Mitsui Petrochem Ind Ltd Composite board and manufacture thereof
JP2005030044A (en) * 2003-07-11 2005-02-03 Takiron Co Ltd Hand hole

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1044281A (en) * 1996-07-31 1998-02-17 Mitsui Petrochem Ind Ltd Composite board and manufacture thereof
JP2005030044A (en) * 2003-07-11 2005-02-03 Takiron Co Ltd Hand hole

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013150445A (en) * 2012-01-19 2013-08-01 Haneda Concrete Industrial Co Ltd Conduit section of wire common duct and installation structure

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