JP2016142013A - Method for correcting differential settlement of continuous footing - Google Patents
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Abstract
【課題】 布基礎にひびや割れといった損傷を与えることなく、また、施工に手間や費用をかけず、布基礎の不等沈下を修正する方法を提供すること。【解決手段】 布基礎の不等沈下した部分のフーチング部に沿ったその下方の複数の箇所に、膨張性樹脂を一度に充填して膨張させること、膨張性樹脂の充填を、充填された樹脂がフーチング部の幅からはみ出して膨張しないように行うことを特徴とする。【選択図】 図１PROBLEM TO BE SOLVED: To provide a method for correcting uneven settlement of a fabric foundation without damaging the fabric foundation such as cracking or cracking and without labor and cost for construction. SOLUTION: A plurality of portions below a footing portion of an unevenly settled portion of a fabric base are filled with an expandable resin at a time and expanded, and the expandable resin is filled with the resin. Is carried out so as not to expand from the width of the footing part. [Selection] Figure 1
Description
本発明は、布基礎の不等沈下を修正する方法に関する。 The present invention relates to a method for correcting uneven settlement of fabric foundations.
建物の基礎構造体として、建物の外周や壁に沿って形成された布基礎によって構成されているものは当業者に周知の通りである。布基礎は、水平面に沿うフーチング部と、フーチング部から垂直に立ち上がる立上部を有し、断面逆Ｔ字形状である。近年、様々な原因による基礎構造体の不等沈下が問題となっており、その対策が必要とされていることから、布基礎の不等沈下を修正する方法についても様々な方法が提案されている。例えば特許文献１では、油圧ジャッキを用いて布基礎の不等沈下した部分をジャッキアップすることによる方法が提案されている。しかしながら、油圧ジャッキを用いる方法は、布基礎の一箇所においてジャッキアップすると、布基礎を持ち上げる力が一点に集中することによって布基礎に不均一な負荷がかかってしまい、布基礎がひび割れを起こすといったことがある。このような問題は、複数の油圧ジャッキを用い、布基礎の不等沈下した部分のフーチング部に沿った複数の箇所においてジャッキアップすることによって解決することができる。しかしながら、こうした解決策は、施工に手間や費用を必要とする。 As is well known to those skilled in the art, the foundation structure of a building is constituted by a fabric foundation formed along the outer periphery or wall of the building. The fabric foundation has a footing portion along a horizontal plane and an upright portion that rises vertically from the footing portion, and has an inverted T-shaped cross section. In recent years, unequal settlement of foundation structures due to various causes has become a problem, and countermeasures are required, so various methods have also been proposed for correcting unequal settlement of fabric foundations. Yes. For example, Patent Document 1 proposes a method by jacking up an unevenly settled portion of a fabric foundation using a hydraulic jack. However, in the method using the hydraulic jack, if the jack is raised at one location of the fabric foundation, the force that lifts the fabric foundation is concentrated at one point, thereby causing an uneven load on the fabric foundation and causing the fabric foundation to crack. Sometimes. Such a problem can be solved by using a plurality of hydraulic jacks and jacking up at a plurality of locations along the footing portion of the unevenly subsidized portion of the fabric foundation. However, such a solution requires labor and cost for construction.
そこで本発明は、布基礎にひびや割れといった損傷を与えることなく、また、施工に手間や費用をかけず、布基礎の不等沈下を修正する方法を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for correcting uneven settlement of a fabric foundation without damaging the fabric foundation such as cracking or cracking, and without labor and cost for construction.
上記の点に鑑みてなされた本発明の布基礎の不等沈下を修正する方法は、請求項１記載の通り、布基礎の不等沈下した部分のフーチング部に沿ったその下方の複数の箇所に、膨張性樹脂を一度に充填して膨張させること、膨張性樹脂の充填を、充填された樹脂がフーチング部の幅からはみ出して膨張しないように行うことを特徴とする。 The method for correcting uneven settlement of the fabric foundation according to the present invention made in view of the above points, as described in claim 1, includes a plurality of locations below the foot foundation portion of the uneven foundation portion of the fabric foundation. Further, the inflatable resin is filled and expanded at once, and the inflatable resin is filled so that the filled resin does not protrude from the width of the footing portion.
本発明の布基礎の不等沈下を修正する方法によれば、個々の箇所に充填された膨張性樹脂が膨張することによって生じる膨張圧力による布基礎を持ち上げる力が、フーチング部の脇から周囲の土中に逃げないことから、個々の樹脂による布基礎を持ち上げる力の全てがフーチング部の下面に対して働き、かつ、個々の布基礎を持ち上げる力が合算されて一度にフーチング部の下面に対して働く。結果として、不等沈下した布基礎は、いわばフーチング部の下面に対向する面の力によって持ち上げられることになるので、布基礎が持ち上げられる際に、布基礎に不均一な負荷がかかってしまうことで布基礎がひび割れを起こすといったことがない。 According to the method for correcting uneven settlement of the fabric foundation of the present invention, the force to lift the fabric foundation due to the expansion pressure generated by the expansion of the inflatable resin filled in the individual locations is from the side of the footing part to the surrounding area. Since it does not escape into the soil, all the force to lift the fabric foundation by each resin works on the bottom surface of the footing part, and the force to lift each fabric foundation is added to the bottom surface of the footing part at once. Work. As a result, the unevenly settled fabric foundation is lifted by the force of the surface facing the lower surface of the footing part, so that when the fabric foundation is lifted, an uneven load is applied to the fabric foundation. The fabric foundation does not crack.
本発明の布基礎の不等沈下を修正する方法は、布基礎の不等沈下した部分のフーチング部に沿ったその下方の複数の箇所に、膨張性樹脂を一度に充填して膨張させること、膨張性樹脂の充填を、充填された樹脂がフーチング部の幅からはみ出して膨張しないように行うことを特徴とするものである。以下、本発明の布基礎の不等沈下を修正する方法を、図面を用いて説明する。 The method for correcting uneven settlement of the fabric foundation according to the present invention is to fill and expand a plurality of lower portions along the footing portion of the uneven foundation portion of the fabric foundation at once. The filling of the expandable resin is performed so that the filled resin does not swell out of the footing portion. Hereinafter, a method for correcting uneven settlement of the fabric foundation of the present invention will be described with reference to the drawings.
図１は、本発明の布基礎の不等沈下を修正する方法の一実施形態を示す側面概略図であり、図２は、修正後の布基礎の平面透視概略図である。図１に示した実施形態は、布基礎の不等沈下した部分のフーチング部に沿ったその下方の３箇所に、沈下が激しい箇所には多量の膨張性樹脂を、沈下が中程度の箇所には中量の膨張性樹脂を、沈下が穏やかな箇所には少量の膨張性樹脂を、一度に充填して膨張させることによって布基礎の不等沈下を修正するものである。即ち、この実施形態では、布基礎の不等沈下の程度によって個々の箇所に充填して膨張させる膨張性樹脂の量を調整してその修正を行う。この際、沈下が激しい箇所に充填された膨張性樹脂が、フーチング部の幅からはみ出して膨張しないようにすることが肝要である（この実施形態では、沈下が激しい箇所に充填された樹脂がフーチング部の幅からはみ出して膨張しなければ、残りの２箇所に充填された樹脂がフーチング部の幅からはみ出して膨張することはない）。フーチング部の下方に充填された膨張性樹脂がフーチング部の幅からはみ出して膨張してしまうと、樹脂が膨張することによって生じる膨張圧力による布基礎を持ち上げる力がフーチング部の脇から周囲の土中に逃げてしまうことで、布基礎を持ち上げる力の全てがフーチング部の下面に対して働かない。なお、布基礎の不等沈下の修正の程度の確認は、例えば、修正必要部分の上にレーザー受光部を設置するとともに、正常部分の上にレーザー発光部を設置し、レーザーレベル器を用いて行えばよい。 FIG. 1 is a schematic side view showing an embodiment of a method for correcting uneven settlement of a fabric foundation according to the present invention, and FIG. 2 is a schematic plan perspective view of the fabric foundation after correction. In the embodiment shown in FIG. 1, a large amount of expansive resin is applied to the lower three locations along the footing portion of the unevenly subsidized portion of the fabric base, a large amount of expansive resin is applied to a portion where the subsidence is severe, and Is a method of correcting the uneven settlement of the fabric foundation by filling and expanding a medium amount of expandable resin and a small amount of expandable resin at a time in a place where the settlement is gentle. In other words, in this embodiment, the amount of the expandable resin that is filled and expanded in each location is adjusted according to the degree of uneven settlement of the fabric foundation. At this time, it is important that the expansive resin filled in the place where the settlement is severed does not protrude from the width of the footing portion (in this embodiment, the resin filled in the place where the settlement is severed is the footing. Unless the resin protrudes from the width of the portion and expands, the resin filled in the remaining two portions does not protrude from the width of the footing portion and expands). If the expandable resin filled below the footing part protrudes from the width of the footing part and expands, the force that lifts the fabric foundation due to the expansion pressure caused by the resin expanding will cause a force from the side of the footing part to the surrounding soil. By escaping, all the force to lift the fabric foundation does not work against the bottom surface of the footing part. In order to check the degree of correction of uneven settlement of the fabric foundation, for example, install a laser receiver on the part that needs correction, install a laser emitter on the normal part, and use a laser level device. Just do it.
図３は、布基礎のフーチング部の下方に膨張性樹脂を充填する方法の一例を示す断面概略図である（参考までに布基礎の標準とされる寸法を記載しておく）。フーチング部の下方に充填された膨張性樹脂が、フーチング部の幅からはみ出して膨張することなく、布基礎を持ち上げる力を発揮するためには、膨張性樹脂の充填は、例えば、布基礎にドリルで穴をあけ、膨張性樹脂の貯留タンクと空気圧縮機に連結されたガンを用い、そのフーチング部の幅方向の中央部から行うことが望ましい。 FIG. 3 is a schematic cross-sectional view showing an example of a method of filling an expandable resin below the footing portion of the fabric foundation (describes the standard dimensions of the fabric foundation for reference). In order for the expansive resin filled below the footing part to exert a force to lift the cloth foundation without protruding from the width of the footing part and expanding, the expansive resin filling can be performed, for example, by drilling the cloth foundation. It is desirable that a hole is made by using a gun connected to a storage tank of an expandable resin and an air compressor, and that the footing portion is formed from the center in the width direction.
本発明において用いる膨張性樹脂は、樹脂が膨張することによって生じる膨張圧力が布基礎を持ち上げる力となるものであればどのようなものであってもよいが、中でも地球温暖化を引き起こすことなく環境に優しいノンフロン系膨張性樹脂が望ましい。ノンフロン系膨張性樹脂としては、フロンガスを発生することなく反応して発泡ウレタンとなる、ポリオールとイソシアネートからなる市販のものなどが挙げられる（具体的には日本パフテム株式会社のノンフロンポリオールＦＦ５０２０−ＵＣと同社のイソシアネートＮＰ−９０の組み合わせが例示される）。このようなノンフロン系膨張性樹脂を用いる場合、施工現場において、ポリオールとイソシアネートを１：０．８〜１．５の重量割合で２０℃〜７０℃にて要時混合して用いることが望ましい。ノンフロン系膨張性樹脂は、ポリオールとイソシアネートからなるものの他、水とイソシアネートとの反応で炭酸ガス発泡するもの、液化炭酸ガスを利用して発泡させるもの、発泡特性を有する炭化水素系のものなどであってもよい（必要であれば特開２００６−１４４２６９号公報を参照のこと）。 The expansive resin used in the present invention may be anything as long as the expansion pressure generated by the expansion of the resin is a force that lifts the cloth foundation, but in particular the environment without causing global warming. Friendly non-fluorocarbon expansible resin is desirable. Non-Freon-based expansive resin includes a commercially available product made of polyol and isocyanate that reacts without generating Freon gas to become foamed urethane (specifically, non-Freon polyol FF5020-UC of Nippon Paphtem Co., Ltd.) The company's combination of isocyanate NP-90 is exemplified). When such a non-fluorocarbon expansive resin is used, it is desirable to mix and use polyol and isocyanate at a weight ratio of 1: 0.8 to 1.5 at 20 ° C. to 70 ° C. when necessary. Non-fluorocarbon expansive resins include those composed of polyols and isocyanates, those that foam by carbon dioxide by the reaction of water and isocyanate, those that foam using liquefied carbon dioxide, and hydrocarbons that have foaming characteristics. It may be present (see JP-A-2006-144269 if necessary).
なお、図１に示した実施形態は、布基礎の不等沈下の程度によって個々の箇所に充填して膨張させる膨張性樹脂の量を調整してその修正を行うものであるが、布基礎の不等沈下の程度によって個々の箇所に充填して膨張させる膨張性樹脂の種類を変えてその修正を行うこともできる。即ち、例えば布基礎の不等沈下した部分のフーチング部に沿ったその下方の３箇所に、沈下が激しい箇所には膨張圧力が大きい膨張性樹脂を、沈下が中程度の箇所には膨張圧力が中程度の膨張性樹脂を、沈下が穏やかな箇所には膨張圧力が小さい膨張性樹脂を、一度に充填して膨張させることによって布基礎の不等沈下を修正してもよい。膨張性樹脂の膨張圧力は、膨張時間や流動性などの特性と同様に、膨張性樹脂を構成する成分を変更することなどによって容易に調節することができる。 In the embodiment shown in FIG. 1, the amount of inflatable resin to be filled and inflated in each location is adjusted depending on the degree of uneven settlement of the fabric foundation, and the correction is performed. The correction can be made by changing the type of inflatable resin to be filled and expanded in each part depending on the degree of uneven settlement. That is, for example, an inflatable resin with a large expansion pressure is applied to three places below the footing portion of the unequal subsidence portion of the fabric foundation, a high expansion pressure is applied to a portion where the subsidence is severe, and an expansion pressure is applied to a portion where the subtraction is intermediate The uneven subsidence of the fabric foundation may be corrected by filling a moderately expansive resin with an expansive resin having a low expansion pressure at a place where the subsidence is gentle and filling it at once. The expansion pressure of the expandable resin can be easily adjusted by changing the components constituting the expandable resin, as well as the characteristics such as expansion time and fluidity.
言うまでもないことであるが、布基礎の不等沈下した部分のフーチング部に沿ったその下方の、膨張性樹脂を一度に充填して膨張させる場所やその数は、布基礎の不等沈下の程度などに応じて適宜決めればよい。また、膨張性樹脂を一度に充填して膨張させる場所と場所の間のピッチも、布基礎の不等沈下の程度などに応じて適宜決めればよい。即ち、膨張性樹脂の充填は、隣り合う膨張した後の樹脂の間に隙間ができないように行ってもよいし（隣り合う膨張した後の樹脂が重なり合うことを否定するものではない）、隙間ができるように行ってもよい。複数の箇所への膨張性樹脂の充填を、隣り合う膨張した後の樹脂の間に隙間ができるように行った場合、その隙間に追加の膨張性樹脂を充填して膨張させてもよい。また、布基礎の不等沈下の修正の実効性をより高めるために、隣り合う膨張した後の樹脂の間の隙間に限らず、例えばフーチング部の下方で膨張した後の樹脂とフーチング部の下面の間に追加の樹脂を充填して膨張させてもよい。 Needless to say, the number of places where the inflatable resin is filled and expanded along the footing part of the unequal subsidence portion of the fabric foundation and the number of them is the extent of the unequal subsidence of the fabric base. What is necessary is just to determine suitably according to etc. Further, the pitch between the places where the inflatable resin is filled and expanded at a time may be appropriately determined according to the degree of uneven settlement of the fabric foundation. That is, the filling of the expandable resin may be performed so that there is no gap between adjacent expanded resins (it is not denied that the adjacent expanded resins overlap), or the gap is not You may go as you can. When filling a plurality of locations with the expandable resin so that a gap is formed between the adjacent expanded resins, the gap may be filled with an additional expandable resin to be expanded. In addition, in order to further improve the effectiveness of correcting uneven settlement of the fabric foundation, not only the gap between adjacent expanded resins, for example, the resin after expanding below the footing portion and the bottom surface of the footing portion An additional resin may be filled between and expanded.
付言すると、布基礎の不等沈下した部分のフーチング部に沿ったその下方の複数の箇所に、モルタルを一度に圧送することで布基礎を持ち上げようとしてもできない。モルタルは流動性が高いため、圧送されたモルタルはフーチング部の脇から周囲の土中に容易に流出したり、周囲の土中に流出できない時には圧送元に逆流したりするため、布基礎を持ち上げる力として作用しない。 In addition, it is impossible to lift the fabric foundation by pumping the mortar all at once to a plurality of locations below the footing portion of the unequally settled portion of the fabric foundation. Since the mortar has high fluidity, the mortar that has been pumped can easily flow out from the side of the footing part into the surrounding soil, or when it cannot flow into the surrounding soil, it will flow back to the pumping source, so lift the fabric foundation Does not act as a force.
本発明は、布基礎にひびや割れといった損傷を与えることなく、また、施工に手間や費用をかけず、布基礎の不等沈下を修正する方法を提供することができる点において産業上の利用可能性を有する。 INDUSTRIAL APPLICABILITY The present invention is industrially applicable in that it can provide a method for correcting uneven settlement of a fabric foundation without damaging or cracking the fabric foundation, without requiring labor and cost for construction. Have potential.
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| WO2023286837A1 (en) * | 2021-07-14 | 2023-01-19 | メインマーク株式会社 | Method for repairing subsided floor |
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| CN104047307A (en) * | 2014-07-03 | 2014-09-17 | 上海申元岩土工程有限公司 | Method for reinforcing and deviation correcting of building foundation through combined grouting |
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| WO2023286837A1 (en) * | 2021-07-14 | 2023-01-19 | メインマーク株式会社 | Method for repairing subsided floor |
| CN115506424A (en) * | 2022-10-20 | 2022-12-23 | 中铁大桥勘测设计院集团有限公司 | Deviation rectifying method for existing building |
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