JP4804958B2 - Joint structure of precast concrete foundation - Google Patents

Joint structure of precast concrete foundation Download PDF

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JP4804958B2
JP4804958B2 JP2006053274A JP2006053274A JP4804958B2 JP 4804958 B2 JP4804958 B2 JP 4804958B2 JP 2006053274 A JP2006053274 A JP 2006053274A JP 2006053274 A JP2006053274 A JP 2006053274A JP 4804958 B2 JP4804958 B2 JP 4804958B2
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foundation
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precast concrete
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concrete foundation
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貴久 森
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Daiwa House Industry Co Ltd
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Description

本発明は、プレキャストコンクリート基礎のジョイント構造に関する。   The present invention relates to a joint structure of a precast concrete foundation.

プレキャストコンクリート基礎のジョイント方法として、ジョイントされる一方のプレキャストコンクリート基礎材の端部から外に突出させた鉄筋と、ジョイントされるもう一方のプレキャストコンクリート基礎材の端部から外に突出させた鉄筋とを、機械式継ぎ手や重ね継ぎ手によって接合した後、ジョイント部にコンクリートを後施工し、突出鉄筋をコンクリート中に埋込み状態にして、基礎材同士を一体化する方法がある。   As a joint method of the precast concrete foundation, a reinforcing bar protruding outward from the end of one precast concrete foundation to be joined, and a reinforcing bar protruding outward from the end of the other precast concrete foundation to be joined, Are joined by a mechanical joint or a lap joint, and then concrete is post-constructed in the joint part, and the protruding reinforcing bars are embedded in the concrete to integrate the base materials together.

しかしながら、この方法では、後施工のコンクリートが硬化を終えなければジョイント部は基礎としての断面性能を発揮できず、建方開始までに日数を要するという問題がある。   However, this method has a problem that the joint part cannot exhibit the cross-sectional performance as a foundation unless post-installed concrete finishes hardening, and it takes days before the construction starts.

そのため、従来より、ジョイントする一方のプレキャストコンクリート基礎材の端部に、該基礎材の内部鉄筋と接合した垂直な連結板を設けると共に、ジョイントするもう一方のプレキャストコンクリート基礎材の端部に、該基礎材の内部鉄筋と接合した垂直な連結板を設け、これら連結板同士を、重ね合わせ状態にして、連結板と直交する方向を向くボルトで接合することによってプレキャストコンクリート基礎材同士をジョイントする方法が提案されている。
特開２０００−３３６６６２号公報 Therefore, conventionally, at the end of one precast concrete foundation material to be joined, a vertical connecting plate joined to the internal reinforcing bar of the foundation material is provided, and at the end of the other precast concrete foundation material to be joined, A method of jointing precast concrete foundation materials by providing vertical connection plates joined to the internal reinforcing bars of the foundation material, putting these connection plates in an overlapped state, and joining them with bolts facing in a direction orthogonal to the connection plates Has been proposed.
JP 2000-336662 A

しかしながら、この方法によりジョイントされた基礎では、連結板同士がたとえ高力ボルト接合されていたとしても、建方などによってジョイント部に曲げ応力を生じ、ジョイント部に基礎の延びる方向の引張りと圧縮が作用すると、ボルトに大きなせん断力がかかってしまうことがあり、しっかりとした耐力を確保するには、使用するボルトの本数を多くしなければならず、そうするとジョイント作業に手間と時間を要してしまうという問題を生じる。   However, in the foundation jointed by this method, even if the connecting plates are joined with high-strength bolts, bending stress is generated in the joint part due to the construction, etc., and the joint part is pulled and compressed in the extending direction of the foundation. If applied, a large shearing force may be applied to the bolt, and to secure a firm strength, the number of bolts to be used must be increased. Cause the problem of end.

本発明は、上記のような問題点に鑑み、基礎の延びる方向の引張りと圧縮にしっかりと耐えることができ、しかも、手間と時間を要さず容易にジョイントすることができるプレキャストコンクリート基礎のジョイント構造を提供することを課題とする。   In view of the above problems, the present invention is a precast concrete foundation joint that can withstand the tension and compression in the direction in which the foundation extends and can be easily joined without labor and time. It is an object to provide a structure.

上記の課題は、ジョイントされる一方のプレキャストコンクリート基礎材の端部に、該基礎材の内部鉄筋と接合された垂直な連結板が設けられると共に、
ジョイントされるもう一方のプレキャストコンクリート基礎材の端部に、該基礎材の内部鉄筋と接合された垂直な連結板が設けられ、
これら連結板同士が、重ね合わせ状態にされ、連結板と直交する方向を向くボルトで接合されると共に、各連結板には、それらの対向接合面部に、互いに嵌まり合って基礎の延びる方向の圧縮と引張りに抵抗する凹凸が設けられていることを特徴とするプレキャストコンクリート基礎のジョイント構造によって解決される。 The above problem is that a vertical connecting plate joined to the internal reinforcing bar of the foundation material is provided at the end of one precast concrete foundation material to be jointed,
At the end of the other precast concrete foundation material to be joined, a vertical connecting plate joined to the internal reinforcement of the foundation material is provided,
These connecting plates are overlapped and joined with bolts facing in a direction orthogonal to the connecting plates, and each connecting plate is fitted to each other on the opposing joining surface portion in the direction in which the foundation extends. This is solved by a joint structure of a precast concrete foundation characterized by being provided with irregularities that resist compression and tension.

このジョイント構造では、各連結板の対向接合面部に設けられて互いに嵌め合わされた凹凸が、基礎の延びる方向の圧縮と引張りにしっかりと抵抗することができて、該圧縮と引張りにしっかりと耐えることができる。   In this joint structure, the concavities and convexities provided on the opposing joint surfaces of each connecting plate and fitted to each other can firmly resist compression and tension in the extending direction of the foundation, and can withstand the compression and tension firmly. Can do.

しかも、上記のような凹凸の嵌まり合いで圧縮と引張りに耐える構造であることにより、ボルトへの負担をなくすないしは少なくすることができ、少ない本数のボルトでジョイント作業を行え、また、凹凸は嵌め合わせるだけでよいので、基礎材同士を、手間と時間を要さず容易にジョイントすることができる。   In addition, the structure that can withstand the compression and tension by fitting the unevenness as described above can eliminate or reduce the burden on the bolt, and can perform joint work with a small number of bolts. Since they only need to be fitted together, the base materials can be easily joined without requiring labor and time.

もちろん、各プレキャストコンクリート基礎材端部の連結板は、同基礎材の内部鉄筋と接合され、連結板同士は、凹凸嵌まり合いの状態でボルト接合されているので、それだけで、基礎の延びる方向の圧縮と引張りに耐えることができ、ジョイント部分に対するコンクリートの後施工を行うか否かにかかわらず、ジョイント後、すぐに建方を開始することができる。   Of course, the connecting plate at the end of each precast concrete foundation material is joined to the internal reinforcing bars of the foundation material, and the connecting plates are bolted together in a concavo-convex fit state. It can withstand compression and tension, and can start construction immediately after the joint, regardless of whether or not the concrete is applied to the joint part.

本発明のジョイント構造は、以上のとおりのものであるから、基礎の延びる方向の引張りと圧縮にしっかりと耐えることができ、しかも、手間と時間を要さず容易にジョイントすることができる。   Since the joint structure of the present invention is as described above, it can withstand the tension and compression in the direction in which the foundation extends, and can be easily joined without requiring labor and time.

次に、本発明の実施最良形態を図面に基づいて説明する。   Next, the best mode for carrying out the present invention will be described with reference to the drawings.

図１〜図４に示す実施形態のプレキャストコンクリート基礎のジョイント構造において、１，１はジョイントされる一方ともう一方のプレキャストコンクリート基礎材であり、各基礎材１，１は、図１〜図３に示すように、基礎立ち上がり部１ａとフーチング部１ｂとを備え、ジョイントされる側の端部は、立ち上がり部１ａがフーチング部１ｂよりも外方に突出し、立ち上がり部１ａ，１ａ同士があいじゃくり形式で接合されるようになされている。   In the joint structure of the precast concrete foundation according to the embodiment shown in FIGS. 1 to 4, reference numerals 1 and 1 denote one and the other precast concrete foundation materials to be joined. As shown in FIG. 1, the base rising portion 1a and the footing portion 1b are provided, and the rising end portion 1a protrudes outward from the footing portion 1b, and the rising portions 1a and 1a are open to each other. It is designed to be joined in a form.

これら基礎材１，１同士をジョイントするため、各基礎材１，１の端部には、垂直な鋼製連結板２がしゃくり部の接合面側に沿うように備えられており、該連結板２は、その基端側が基礎材１のコンクリート中に埋込み状態にされて内部鉄筋１ｃ，１ｃと接合されている。   In order to joint these base materials 1 and 1, a vertical steel connecting plate 2 is provided at the end of each base material 1 and 1 so as to be along the joint surface side of the shackle portion. 2, the base end side is embedded in the concrete of the base material 1 and joined to the internal reinforcing bars 1c and 1c.

そして、各基礎材１，１の連結板２には、しゃくり部に沿う部分において凹凸３が設けられ、該凹凸３は、上下方向に延び、基礎の延びる方向に山谷を繰り返す方形波状のものからなっていて、一方の基礎材１側の連結板２の凹凸３と、もう一方の基礎材１側の連結板２の凹凸３とがしっくりと嵌まり合うようになされている。   Then, the connecting plate 2 of each foundation material 1, 1 is provided with unevenness 3 in a portion along the shank portion, and the unevenness 3 extends from the top to the bottom and has a square wave shape that repeats peaks and valleys in the extending direction of the foundation. Thus, the unevenness 3 of the connecting plate 2 on the one base material 1 side and the unevenness 3 of the connecting plate 2 on the other base material 1 side are fitted together.

また、各連結板２，２には、しゃくり部に沿う部分において、ボルト接合用の複数の通孔４…が上下方向に間隔をおいて設けられていると共に、各基礎材１，１のしゃくり部には、該ボルト通孔４…に対応して、同心で径大なボルト操作孔５…が設けられている。   Each of the connecting plates 2 and 2 is provided with a plurality of bolt-joining holes 4 at intervals along the shackle portion in the vertical direction. The part is provided with concentric and large bolt operating holes 5 corresponding to the bolt through holes 4.

上記の両基礎材１，１は、図４（イ）（ロ）に示すように、一方の基礎材１の連結板２の凹凸３と、もう一方の基礎材１の連結板２の凹凸３とを嵌め合わせ状態にし、そして、図４（ハ）に示すように、ボルト６…で連結板２，２同士を高力ボルト接合すれば、基礎材１，１同士がジョイントされる。   As shown in FIGS. 4 (A) and 4 (B), both the base materials 1 and 1 have the unevenness 3 of the connection plate 2 of one base material 1 and the unevenness 3 of the connection plate 2 of the other base material 1. And the base plates 1 and 1 are joined to each other as shown in FIG. 4 (c).

その後は、図２に示すように、各基礎材１，１のしゃくり部の各ボルト操作孔５…にモルタル８を充填し、また、フーチング部１ｂ，１ｂ間にコンクリート８を打設して基礎を仕上げればよい。フーチング部１ｂ，１ｂ間のコンクリート８は、床下土間用のコンクリートを打設する際に、併せて打設するようにすれば、フーチング部１ｂ，１ｂ間用のコンクリートをわざわざ用意する必要はないし、施工も容易である。   Thereafter, as shown in FIG. 2, the mortar 8 is filled in the bolt operation holes 5 of the shackle portions of the foundation materials 1 and 1, and the concrete 8 is placed between the footing portions 1b and 1b. Finish. If the concrete 8 between the footings 1b and 1b is placed together when placing concrete for the underfloor soil, it is not necessary to prepare concrete for the footings 1b and 1b. Construction is also easy.

上記のジョイント構造では、各基礎材１の連結板２が、該基礎材１の内部鉄筋１ｃ，１ｃと接合されており、かつ、連結板２，２同士は、凹凸３，３が嵌め合わせ状態にされてボルト６で接合されているので、ボルト６によって嵌め合わせ状態に保持された凹凸３，３が、基礎の延びる方向の圧縮と引張りにしっかりと抵抗することができて、該圧縮と引張りにしっかりと耐えることができる。従って、フーチング部１ｂ，１ｂ間にコンクリート８を打設するか否か、打設した場合にそのコンクリートが硬化を終えたか否かにかかわらず、建方を開始しても、基礎はそれに耐えることができ、基礎の構築から建方に至る工事の工期を短縮することができる。   In the above joint structure, the connecting plate 2 of each base material 1 is joined to the internal rebars 1c, 1c of the base material 1, and the connecting plates 2, 2 are in a state where the projections 3, 3 are fitted together. Since the bolts 6 are joined together by the bolts 6, the unevenness 3, 3 held in the fitted state by the bolts 6 can firmly resist the compression and tension in the extending direction of the foundation, and the compression and tension Can withstand Therefore, regardless of whether or not the concrete 8 is placed between the footing parts 1b and 1b and whether or not the concrete has been hardened when the concrete is placed, the foundation can withstand it even if the construction is started. The construction period from construction of the foundation to construction can be shortened.

しかも、上記のような凹凸３，３の嵌まり合いで圧縮と引張りに耐える構造であることにより、ボルト６…への負担をなくすないしは少なくすることができ、少ない本数のボルトでジョイント作業を行え、また、凹凸３，３は嵌め合わせるだけでよいので、基礎材１，１同士を、手間と時間を要さず容易にジョイントすることができる。   In addition, the structure that can withstand the compression and tension by fitting the unevennesses 3 and 3 as described above can eliminate or reduce the burden on the bolts 6 and can perform joint work with a small number of bolts. Moreover, since the unevenness | corrugations 3 and 3 need only be fitted together, the base materials 1 and 1 can be easily joined without requiring labor and time.

以上に、本発明の実施形態を示したが、本発明はこれに限られるものではなく、発明思想を逸脱しない範囲で各種の変更が可能である。例えば、上記の実施形態では、各連結板２の凹凸３が、上下方向に延び、基礎の延びる方向に山谷を繰り返す方形波状のものからなっている場合を示したが、凹凸は、互いに嵌まり合って基礎の延びる方向の圧縮と引張りに抵抗することのできる形態をしていればよく、その範囲において、例えば、曲げ応力による引張りと圧縮に耐えることを目的とする場合には、基礎の延びる方向に延び、上下方向に山谷を繰り返す方形波状のものなど、各種形態をしていてよい。   Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the case where the unevenness 3 of each connecting plate 2 is made of a rectangular wave that extends in the vertical direction and repeats the peaks and valleys in the extending direction of the foundation has been shown. Therefore, it is only necessary to have a form capable of resisting compression and tension in the direction in which the foundation extends, and in the range, for example, when the purpose is to withstand tension and compression due to bending stress, the foundation extends. It may take various forms such as a rectangular wave that extends in the direction and repeats the valleys in the vertical direction.

また、連結板２は、しっかりとした連結状態を形成することができるようなものからなっていればよく、鋼製連結板のほか、各種金属製の連結板であってもよいし、金属以外の連結板からなっていてもよい。   Moreover, the connection plate 2 should just consist of what can form the firm connection state, and may be a connection plate made from various metals other than a steel connection plate, and other than a metal. It may consist of a connecting plate.

更に、上記の実施形態では、プレキャストコンクリート基礎材１として、立ち上がり部とフーチング部とを備えた布基礎用の基礎材を用いた場合を示したが、立ち上がり部のみを有する基礎材など、各種形態の基礎材であってよい。   Furthermore, although the case where the foundation material for cloth foundations provided with the rising part and the footing part was used as the precast concrete foundation material 1 in the above-described embodiment, various forms such as a foundation material having only the rising part is shown. It may be a basic material.

実施形態のジョイント構造を示す分解斜視図である。It is a disassembled perspective view which shows the joint structure of embodiment. 図（イ）は同側面図、図（ロ）は図（イ）のＩ−Ｉ線矢視断面図である。FIG. 1 (a) is a side view of the same, and FIG. 図（イ）は連結板同士の連結状態を示す正面図、図（ロ）は図（イ）のＩＩ−ＩＩ線断面図、図（ハ）は連結板同士を分離状態に示す断面平面図、図（ニ）は連結板の凹凸同士が嵌め合わされた状態の断面平面図である。FIG. (A) is a front view showing a connection state between the connection plates, FIG. (B) is a cross-sectional view taken along the line II-II in FIG. (A), and FIG. FIG. (D) is a cross-sectional plan view of the state in which the concavities and convexities of the connecting plate are fitted together. 図（イ）〜図（ハ）はジョイント方法を順次に示す断面平面図である。FIGS. 1A to 1C are cross-sectional plan views sequentially showing joint methods.

符号の説明Explanation of symbols

１…プレキャストコンクリート基礎材
１ｃ…内部鉄筋
２…連結板
３…凹凸
６…ボルト DESCRIPTION OF SYMBOLS 1 ... Precast concrete base material 1c ... Internal reinforcement 2 ... Connection board 3 ... Concavity and convexity 6 ... Bolt

Claims (1)

ジョイントされる一方のプレキャストコンクリート基礎材の端部に、垂直で、板面を基礎の延びる方向と直交する方向に向け、該基礎材の内部鉄筋と接合された連結板が設けられると共に、
ジョイントされるもう一方のプレキャストコンクリート基礎材の端部に、垂直で、板面を基礎の延びる方向と直交する方向に向け、該基礎材の内部鉄筋と接合された連結板が設けられ、
これら連結板同士が、重ね合わせ状態にされ、連結板と直交する方向を向くボルトで接合されると共に、
各連結板には、それらの対向接合面部に、上下方向に延び、基礎の延びる方向に山谷を繰り返す方形波状をして、互いにしっくりと嵌り合う凹凸が設けられ、前記ボルト接合状態においてこれら凹凸が互いに嵌まり合って基礎の延びる方向の圧縮と引張りに抵抗するようになされていることを特徴とするプレキャストコンクリート基礎のジョイント構造。 The end portion of one of the pre-cast concrete foundation material to be joint, a vertical, directed in the direction perpendicular to the direction of extension of the foundation a plate surface, with consolidated plate which is joined to the internal reinforcement of the basic material is provided,
The end portion of the other precast concrete foundation material is joint, perpendicular, toward a direction perpendicular to the direction of extension of the underlying plate surface, consolidated plate is provided which is joined to the internal reinforcement of the basic material,
These connecting plates are superposed and joined with a bolt that faces in a direction perpendicular to the connecting plate,
Each connecting plate is provided with irregularities extending in the vertical direction and having a square wave shape repeating the peaks and valleys in the direction in which the foundation extends, and the irregularities that fit closely together are provided on each of the connecting plates. A joint structure for a precast concrete foundation characterized by being fitted to each other and resisting compression and tension in the extending direction of the foundation.
JP2006053274A 2006-02-28 2006-02-28 Joint structure of precast concrete foundation Expired - Fee Related JP4804958B2 (en)

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JPS5120170Y2 (en) * 1972-11-02 1976-05-27
FR2651609B1 (en) * 1989-09-01 1992-01-03 Thomson Csf POINT CONTROL FOR AN ELECTRONIC SCANNING ANTENNA SYSTEM AND BEAM FORMATION THROUGH THE CALCULATION.
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