JP2008303623A - Settlement correction method for building - Google Patents

Settlement correction method for building Download PDF

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JP2008303623A
JP2008303623A JP2007152029A JP2007152029A JP2008303623A JP 2008303623 A JP2008303623 A JP 2008303623A JP 2007152029 A JP2007152029 A JP 2007152029A JP 2007152029 A JP2007152029 A JP 2007152029A JP 2008303623 A JP2008303623 A JP 2008303623A
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foundation
building
expansion
layer
gap
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JP4884308B2 (en
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Hajime Fujino
Toshiharu Kikko
Shigeo Matsubara
Takefumi Nakako
Satoshi Nakano
Takashi Sato
Ikuo Tashiro
Takayuki Yoshida
智 中野
武文 仲子
隆 佐藤
剛之 吉田
茂雄 松原
敏晴 橘高
郁夫 田代
一 藤野
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Nisshin Kokan Kk
Nisshin Steel Co Ltd
Sumirin Base Techno Corp
Sumitomo Forestry Co Ltd
スミリンベーステクノ株式会社
住友林業株式会社
日新製鋼株式会社
日新鋼管株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a settlement correction method for building, capable of easily performing settlement correction of a building by effectively lifting up the foundation of a settled part of the building in a stable state by easy operation without needing labor hour. <P>SOLUTION: The method comprises: the first step of forming a clearance 13a between the lower surface of a foundation 11 in the circumferential part of the building 10 of the settled part and a surface layer part 12a of a foundation ground 12, inserting and disposing an expansion steel pipe 18 to and in the clearance 13a, and expanding the pipe by force feed of water, thereby lifting up the foundation 11 in the circumferential part; and the second step of inserting and disposing an expansion bag body 20 to and in the inner part of the building 10 through a clearance 13b between the lower surface of the foundation 11 in the inner part of the building and the surface layer part 12a of the foundation ground 12, which is formed in the first step, and expanding the bag body by force feed of water, thereby lifting up the foundation 11 in the inner part of the building 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、建物の沈下による傾き等を修正するための建物の沈下修正工法に関する。   The present invention relates to a building subsidence correction method for correcting inclination or the like due to building subsidence.
例えば後背湿地、臨海埋立地、三角州低地、おぼれ谷、海岸砂州等を構成する地盤は、泥炭質の地盤や圧密の進行の遅い地盤等によって形成されていることから、軟弱地盤となっている場合が多い。このような軟弱地盤は、地盤支持力が小さく、また引き続き圧密沈下を生じ易いことから、軟弱地盤の上方に建物を構築する場合には、構築された建物に不同沈下(不等沈下)等の沈下が生じやすい。   For example, if the ground that forms the back marsh, coastal landfill, delta lowland, drowning valley, coastal sand bar, etc. is formed from peat-like ground or ground with slow consolidation, etc., it is a soft ground There are many. Such soft ground has a small ground supporting force and is likely to continue to be consolidated. Therefore, when building a building above the soft ground, the subsidence (unequal settlement), etc. Settlement is likely to occur.
建物に沈下が生じた際に、これを修正する手段としては、例えば建物の沈下した部分を基礎と共にジャッキを用いてリフトアップし、リフトアップすることにより生じた基礎と基礎基盤との間の隙間に、モルタルやグラウト等の固化材を充填固化する方法が採用されている(例えば、特許文献1参照)。
特開2000−8398号公報
When a building sinks, the means for correcting this is, for example, lifting the sinked part of the building with a jack together with a jack, and the gap between the foundation and the foundation caused by lifting up. In addition, a method of filling and solidifying a solidifying material such as mortar or grout is employed (for example, see Patent Document 1).
JP 2000-8398 A
しかしながら、ジャッキを用いて建物の基礎をリフトアップする従来の方法では、ジャッキを基礎の下方に潜り込ませて設置する作業や、基礎の側方でジャッキを受けるジャッキ受け金具を基礎の側面に取り付ける作業が大掛かりになると共に、安定した状態で基礎を押し上げるためには、多くのジャッキやジャッキ受け金具を必要とし、さらに多くの手間を要することになる。   However, in the conventional method of lifting the foundation of the building using a jack, the work of installing the jack under the foundation or the work of attaching the jack bracket that receives the jack on the side of the foundation to the side of the foundation However, in order to push up the foundation in a stable state, many jacks and jack brackets are required, and much more work is required.
本発明は、このような従来の課題に着目してなされたものであり、多くの手間を要することなく、簡易な作業によって建物の沈下した部分の基礎を安定した状態で効果的にリフトアップして、建物の沈下修正を容易に行うことのできる建物の沈下修正工法を提供することを目的とする。   The present invention has been made by paying attention to such a conventional problem, and can lift up the foundation of the sinked portion of the building effectively in a stable state by a simple operation without requiring much labor. An object of the present invention is to provide a method for correcting the settlement of a building that can easily correct the settlement of the building.
本発明は、沈下した部分の建物の基礎の下面と、基礎地盤の表層部分との間に隙間を形成して、該隙間に、扁平な断面形状から内部に流体圧力が負荷されて膨張変形する加圧膨張体を挿入配置し、該加圧膨張体に流体を圧送して膨張変形させることにより、前記沈下した部分の建物の基礎をリフトアツプする工程を含む建物の沈下修正工法を提供することにより、上記目的を達成したものである。   The present invention forms a gap between the lower surface of the foundation of the building in the subsidence and the surface layer portion of the foundation ground, and fluid pressure is applied to the gap from a flat cross-sectional shape to cause expansion deformation. Providing a building subsidence correction method including a step of lifting up the foundation of the building in the subsidence part by inserting and arranging a pressurizing expansion body and pumping fluid to the pressurizing expansion body to cause expansion and deformation. The above-mentioned purpose has been achieved.
本発明の建物の沈下修正工法によれば、前記加圧膨張体は、扁平にプレスされた断面形状から内部に流体圧力が負荷されて膨張変形する膨張鋼管であることが好ましい。   According to the subsidence correction method for a building of the present invention, it is preferable that the pressurized expansion body is an expanded steel pipe that expands and deforms when a fluid pressure is applied to the inside from a flatly pressed cross-sectional shape.
本発明の建物の沈下修正工法によれば、前記加圧膨張体は、扁平に畳まれた状態から内部に流体圧力が負荷されて膨張変形する膨張袋体であることが好ましい。   According to the subsidence correction method for a building of the present invention, it is preferable that the pressurized inflatable body is an inflatable bag body that is inflated and deformed when a fluid pressure is applied to the inside from a flat folded state.
本発明の建物の沈下修正工法によれば、前記建物の基礎が、べた基礎であることが好ましい。   According to the subsidence correction method for a building of the present invention, the foundation of the building is preferably a solid foundation.
本発明の建物の沈下修正工法によれば、前記基礎地盤の表層部分が、表層改良工法によって形成された面状固結体であることが好ましい。   According to the subsidence correction method for a building of the present invention, the surface layer portion of the foundation ground is preferably a planar solid body formed by a surface layer improvement method.
本発明の建物の沈下修正工法によれば、前記加圧膨張体に圧送される流体が、水であることが好ましい。   According to the subsidence correction method for a building of the present invention, it is preferable that the fluid pumped to the pressurized expansion body is water.
本発明の建物の沈下修正工法によれば、前記建物の基礎の下面及び/又は前記基礎地盤の表層部分と、前記加圧膨張体との間に反力受けプレートを介在させて前記加圧膨張体を膨張変形させることが好ましい。   According to the subsidence correction method for a building of the present invention, the pressure expansion is performed by interposing a reaction force receiving plate between a lower surface of the foundation of the building and / or a surface layer portion of the foundation ground and the pressure expansion body. The body is preferably expanded and deformed.
そして、本発明の建物の沈下修正工法によれば、沈下した部分の建物の外周部分の基礎の下面と、基礎地盤の表層部分との間に隙間を形成して、該隙間に前記加圧膨張体を挿入配置し、流体を圧送して膨張させることにより、前記外周部分の基礎をリフトアップする第1工程と、該第1工程によって形成された建物の内側部分の基礎の下面と基礎地盤の表層部分との間の隙間を介して、前記加圧膨張体を建物の内側部分に挿入配置し、流体を圧送して膨張させることにより、前記内側部分の基礎をリフトアップする第2工程とを含むことが好ましい。   According to the subsidence correction method for a building of the present invention, a gap is formed between the lower surface of the foundation of the outer peripheral part of the building and the surface layer part of the foundation ground, and the pressure expansion is performed in the gap. A first step of lifting up the foundation of the outer peripheral portion by inserting and arranging a body and pumping and expanding a fluid; a lower surface of a foundation and a foundation ground of an inner portion of the building formed by the first step; A second step of lifting up the foundation of the inner part by inserting and placing the pressurized expansion body into the inner part of the building through a gap between the surface layer part and pumping and expanding the fluid; It is preferable to include.
また、本発明の建物の沈下修正工法によれば、前記第1工程で用いる加圧膨張体が前記膨張鋼管であり、前記第2工程で用いる加圧膨張体が前記膨張袋体であることが好ましい。   Further, according to the building settlement settlement method of the present invention, the pressurized expansion body used in the first step is the expanded steel pipe, and the pressurized expansion body used in the second step is the expansion bag body. preferable.
さらに、本発明の建物の沈下修正工法によれば、該加圧膨張体を膨張変形させて、前記沈下した部分の建物の基礎をリフトアップすることにより形成された前記基礎の下面と基礎地盤の表層部分との間の隙間に、モルタル、グラウト、発泡ウレタン等の固化材を充填する工程を含むことが好ましい。   Further, according to the subsidence correction method for a building of the present invention, the bottom surface of the foundation and the foundation ground formed by inflating and deforming the pressurized expansion body and lifting up the foundation of the building of the subsidence part It is preferable to include a step of filling a gap between the surface layer portion with a solidifying material such as mortar, grout, urethane foam or the like.
本発明の建物の沈下修正工法によれば、多くの手間を要することなく、簡易な作業によって建物の沈下した部分の基礎を安定した状態で効果的にリフトアップして、建物の沈下修正を容易に行うことができる。   According to the building subsidence correction method of the present invention, it is possible to easily lift up the building subsidence by lifting up the foundation of the subsidence of the building in a stable state by a simple operation without much labor. Can be done.
図1〜図8に示す本発明の好ましい一実施形態に係る建物の沈下修正工法は、例えば軟弱地盤の上方に盛土を施して形成された埋立造成地に構築された建物として、例えば住宅建築物10が、建築後に例えば数ヶ月〜数十年経過して不同沈下を生じた際に、住宅建築物10の沈下した部分を押し上げて、住宅建築物10の傾き等を修正するための工法として採用されたものである。すなわち、本実施形態では、住宅建築物10は、西側の部分でその沈下量が大きく、西側に傾いているため、沈下量の大きな西側部分の基礎11を効率良くリフトアップして、住宅建築物10の沈下や傾きを修正する。なお、図1、図2、図3等においては、本実施形態によって沈下が修正される住宅建築物10の要部として、躯体部分を省略した基礎11の部分のみが示されている。   The building settlement correction method according to a preferred embodiment of the present invention shown in FIGS. 1 to 8 is, for example, a residential building as a building constructed on a landfill formed by embankment above a soft ground, for example. 10 is used as a method for correcting the inclination of the residential building 10 by pushing up the sinked part of the residential building 10 when, for example, several months to several decades have elapsed after the building, It has been done. That is, in the present embodiment, the residential building 10 has a large sunk amount in the west part and is inclined to the west side. Therefore, the foundation 11 in the west part having a large sunk amount is lifted up efficiently, and the residential building 10 Fix 10 sinking and tilting. In FIG. 1, FIG. 2, FIG. 3, etc., only the portion of the foundation 11 from which the housing portion is omitted is shown as the main part of the residential building 10 whose subsidence is corrected by this embodiment.
そして、本実施形態の建物の沈下修正工法は、例えば住宅建築物10の不同沈下による傾きを修正するための工法であって、図2、図3、図5、及び図6に示すように、沈下した部分の住宅建築物10の基礎11の下面と、基礎地盤12の表層部分12aとの間に隙間13a,13bを形成して、この隙間13a,13bに、扁平な断面形状から内部に流体圧力が負荷されて膨張変形する加圧膨張体14,15,16を挿入配置し、これらの加圧膨張体14,15,16に流体を圧送して膨張変形させることにより、沈下した部分の住宅建築物10の基礎11をリフトアツプする工程を含んでいる。   And the settlement correction method of the building of this embodiment is a construction method for correcting the inclination by the uneven settlement of the residential building 10, for example, as shown in FIG. 2, FIG. 3, FIG. 5, and FIG. Clearances 13a and 13b are formed between the lower surface of the foundation 11 of the subsidized residential building 10 and the surface layer part 12a of the foundation ground 12, and fluid is introduced into the gaps 13a and 13b from a flat cross-sectional shape to the inside. The pressure-expanded expansion bodies 14, 15, 16 that are inflated and deformed under pressure are inserted and arranged, and the fluid is pumped into the pressure-expanded expansion bodies 14, 15, and 16 so as to be expanded and deformed. The process includes lifting up the foundation 11 of the building 10.
また、本実施形態では、沈下した部分の住宅建築物10の外周部分の基礎11の下面と、基礎地盤12の表層部分12aとの間に隙間13aを形成して、この隙間13aに第1加圧膨張体14を挿入配置し、流体を圧送して膨張させることにより、外周部分の基礎11をリフトアップする第1工程と(図3参照)、第1工程によって形成された住宅建築物11の内側部分の基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13bを介して、第2加圧膨張体15を住宅建築物10の内側部分に挿入配置し、流体を圧送して膨張させることにより、内側部分の基礎11をリフトアップする第2工程(図6参照)とを含んでいる。   Moreover, in this embodiment, the clearance gap 13a is formed between the lower surface of the foundation 11 of the outer peripheral part of the subsidized housing building 10, and the surface layer part 12a of the foundation ground 12, and 1st addition is carried out to this clearance gap 13a. The first step of lifting up the foundation 11 of the outer peripheral portion by inserting and arranging the pressure expansion body 14 and inflating the fluid by inflating the fluid (see FIG. 3), of the residential building 11 formed by the first step The second pressurized expansion body 15 is inserted and arranged in the inner part of the residential building 10 through the gap 13b between the lower surface of the foundation 11 of the inner part and the surface layer part 12a of the foundation ground 12, and the fluid is pumped. And a second step (see FIG. 6) of lifting up the foundation 11 of the inner part by inflating.
本実施形態では、住宅建築物10の基礎11は、外周立上り部11aの内側に基礎スラブ11bを配置したべた基礎となっている。また、外周立上り部11aによって周囲を囲まれる基礎11の内側部分にもまた、住宅建築物11の1階部分の間取りに応じて、仕切壁が配置される適宜の位置に、内側立上り部11cが基礎スラブ11bから立設して設けられている(図1参照)。   In this embodiment, the foundation 11 of the residential building 10 is a solid foundation in which the foundation slab 11b is arranged inside the outer peripheral rising portion 11a. Further, the inner rising portion 11c is also provided at an appropriate position where the partition wall is arranged in the inner portion of the foundation 11 surrounded by the outer peripheral rising portion 11a according to the floor plan of the first floor portion of the residential building 11. It is provided upright from the foundation slab 11b (see FIG. 1).
また、本実施形態では、基礎地盤12の表層部分12aは、表層改良工法によって形成された面状固結体として設けられている(図8(b)参照)。表層改良工法は、基礎地盤12の表層部分12aの土砂に、例えば石灰、セメント等のセメント系固化材を混合し、例えば30〜50cm程度の層厚毎に攪拌と転圧を繰り返すことによって、所望の厚さの面状固結体を、地盤改良層として形成する公知の工法である。本実施形態では、表層改良工法による面状固結体は、例えば住宅建築物10の基礎11よりも一回り大きな同様の平面形状を備えると共に、例えば0.8〜1.0m程度の厚さを有する、圧縮強度が例えば20〜500kN/m2程度の表層部分12aとして形成される。 Moreover, in this embodiment, the surface layer part 12a of the foundation ground 12 is provided as a planar solid body formed by the surface layer improvement construction method (refer FIG.8 (b)). In the surface layer improvement method, a cement-based solidifying material such as lime or cement is mixed with the earth and sand of the surface layer portion 12a of the foundation ground 12 and, for example, by repeating stirring and rolling for every layer thickness of about 30 to 50 cm. This is a known method for forming a planar solid body having a thickness of 5 mm as a ground improvement layer. In this embodiment, the planar solid body by the surface layer improvement construction method has a similar planar shape that is slightly larger than the foundation 11 of the residential building 10, for example, and has a thickness of, for example, about 0.8 to 1.0 m. It is formed as a surface layer portion 12a having a compressive strength of, for example, about 20 to 500 kN / m 2 .
そして、本実施形態では、住宅建築物10の沈下修正を行う際に、まず、第1工程によって、図2及び図3に示すように、外周部分の基礎11の下面と、基礎地盤12の表層部分12aとの間に隙間13aを形成して、この隙間13aに第1加圧膨張体14を挿入配置し、流体を圧送して膨張させることにより、基礎11の外周部分をリフトアップする。   And in this embodiment, when subsidence correction of the residential building 10 is performed, as shown in FIG.2 and FIG.3, as shown in FIG.2 and FIG.3, first, the lower surface of the foundation 11 of the outer peripheral part and the surface layer of the foundation ground 12 are carried out. A gap 13a is formed between the portion 12a, the first pressurizing and expanding body 14 is inserted and arranged in the gap 13a, and the fluid is pumped and expanded to lift up the outer peripheral portion of the foundation 11.
すなわち、住宅建築物10の西側の部分における、基礎11の外周立上り部11aが配置される外周部分の適宜の位置を、第1加圧膨張体14の配設位置17aとして設定し(図1参照)、当該配設位置17aの周囲の地盤の表層土を必要に応じて掘り下げて作業スペース30とする。しかる後に、外周立上り部11aの直下部分における面状固結体による基礎地盤12の表層部分12aを切削して、図2(a)及び図3(a)に示すように、後述する膨張鋼管18による第1加圧膨張体14が挿入可能な、例えば30mm程度の厚さt1の隙間13aを、基礎11の下面と表層部分12aとの間に、基礎11の外周縁部に沿って部形成する。また、形成した隙間13aの基礎地盤12の表層部分12a側に、反力受けプレートとして例えば厚さが10mm程度の鉄板19を敷設した後に、住宅建築物10の外周部分に沿って第1加圧膨張体14を挿入配置する。   That is, an appropriate position of the outer peripheral portion where the outer peripheral rising portion 11a of the foundation 11 is disposed in the west side portion of the residential building 10 is set as the arrangement position 17a of the first pressurizing expansion body 14 (see FIG. 1). ), The surface soil of the ground around the arrangement position 17a is dug down as necessary to form a work space 30. Thereafter, the surface layer portion 12a of the foundation ground 12 by the planar solid body in the portion immediately below the outer peripheral rising portion 11a is cut, and as shown in FIGS. 2 (a) and 3 (a), an expanded steel pipe 18 which will be described later. A gap 13a having a thickness t1 of, for example, about 30 mm is formed between the lower surface of the foundation 11 and the surface layer portion 12a along the outer peripheral edge of the foundation 11. . Moreover, after laying an iron plate 19 having a thickness of, for example, about 10 mm as a reaction force receiving plate on the surface layer portion 12a side of the foundation ground 12 of the formed gap 13a, the first pressure is applied along the outer peripheral portion of the residential building 10 The expansion body 14 is inserted and arranged.
ここで、本実施形態では、第1工程において外周部分の基礎11の下面に配置される第1加圧膨張体14として、好ましくは扁平にプレスされた断面形状から内部に流体圧力が負荷されて膨張変形する膨張鋼管18が用いられる。膨張鋼管18は、トンネル工法として公知のナトム(NATM)工法において、地山を支持するために例えばコンクリートが吹き付けられたトンネルの内面から地山中に打ち込まれるロックボルトとして用いられる、例えば溶融亜鉛めっき鋼板や高耐食溶融めっき鋼板等からなるものが知られており(例えば、特開昭55−12300号公報、特開昭57−77798号公報参照)、これに適宜改良を加えて、住宅建築物10の沈下修正用の部材として使用することができる。より具体的には、膨張鋼管18として、商品名「RPEロックボルト」(日新鋼管(株)製)を用いることができる。   Here, in the present embodiment, as the first pressurizing expansion body 14 disposed on the lower surface of the base 11 in the outer peripheral portion in the first step, fluid pressure is preferably applied to the inside from a cross-sectional shape that is pressed flat. An expanded steel pipe 18 that expands and deforms is used. The expanded steel pipe 18 is used as a rock bolt that is driven into a natural ground from the inner surface of a tunnel sprayed with concrete in order to support the natural ground, for example, in a NATM method known as a tunnel construction method. And high corrosion-resistant hot-dip galvanized steel sheets are known (see, for example, Japanese Patent Laid-Open Nos. 55-12300 and 57-77798). It can be used as a member for correcting settlement. More specifically, as the expanded steel pipe 18, a trade name “RPE rock bolt” (manufactured by Nisshin Steel Pipe Co., Ltd.) can be used.
膨張鋼管18は、図4(a),(b)にも示すように、例えば外径φ54.0〜76.3mm程度、肉厚2〜3mm程度、長さ2〜6m程度の円管を、例えば厚さが20mm程度の扁平な断面形状となるようにプレスすると共に、端部をスエージング加工して注水スリーブ26に圧入した後に、例えばCO2アーク溶接により溶着接合して、当該端部に注水スリーブ26が取り付けられた状態で形成される。また本実施形態では、膨張鋼管18は、例えば20〜30MPa程度の高水圧が負荷されて膨張するようになっており、基礎11aを住宅建築物11と共に押し上げる際のリフトアップ力が、膨張鋼管18を扁平にプレスする際のプレス力と略等しくなるように設計されていることが好ましい。さらに、膨張鋼管18は、例えば20〜30mm程度のリフトアップ量h1(図3(a),(b)参照)を確保できる変形量で膨量変形できるように設定されていることが好ましい。 As shown in FIGS. 4A and 4B, the expanded steel pipe 18 is, for example, a circular pipe having an outer diameter of about 54.0 to 76.3 mm, a thickness of about 2 to 3 mm, and a length of about 2 to 6 m. For example, it is pressed so as to have a flat cross-sectional shape with a thickness of about 20 mm, and after the end portion is swaged and press-fitted into the water injection sleeve 26, it is welded and joined, for example, by CO 2 arc welding, It is formed with the water injection sleeve 26 attached. In the present embodiment, the expanded steel pipe 18 is expanded by being loaded with a high water pressure of, for example, about 20 to 30 MPa, and the lift-up force when pushing up the foundation 11 a together with the residential building 11 is the expanded steel pipe 18. It is preferably designed so as to be approximately equal to the pressing force when pressing the flat. Furthermore, it is preferable that the expanded steel pipe 18 is set so that it can be deformed by a deformation amount that can secure a lift-up amount h1 (see FIGS. 3A and 3B) of, for example, about 20 to 30 mm.
なお、第1工程において外周部分の基礎11の下面に配置される第1加圧膨張体14として、膨張鋼管18を用いることにより、当該膨張鋼管18の剛性によって、基礎11の外周部分の下面に沿って縁部分に形成された狭い幅の隙間13aに対しても、第1加圧膨張体14を容易且つ精度良く、安定した状態で設置することが可能になる。また、膨張鋼管18は、基礎11をリフトアップする際に、基礎11によって上方から押し付けられつつ膨張変形して、その略全長に亘って線状に基礎11と接触しながら当該基礎11を押し上げるので、広範囲な接触面積(接触延長)を確保し、押し上げ時に基礎11から負荷される住宅建築物10の荷重を分散して効率良く支持しつつ、安定した状態で住宅建築物10を押し上げることが可能になる。   In addition, by using the expanded steel pipe 18 as the first pressurizing expansion body 14 arranged on the lower surface of the foundation 11 at the outer peripheral portion in the first step, the lower surface of the outer peripheral portion of the foundation 11 is used due to the rigidity of the expanded steel pipe 18. The first pressurizing expansion body 14 can be easily and accurately installed in a stable state with respect to the narrow-width gap 13a formed along the edge portion. In addition, when the foundation 11 is lifted up, the expanded steel pipe 18 expands and deforms while being pressed from above by the foundation 11, and pushes up the foundation 11 while making linear contact with the foundation 11 over substantially the entire length thereof. It is possible to secure a wide range of contact area (contact extension), disperse the load of the residential building 10 loaded from the foundation 11 when pushing up, and efficiently support the housing building 10 while pushing it up in a stable state. become.
そして、本実施形態では、住宅建築物10の外周部分の基礎11の下面と、基礎地盤12の表層部分12aとの間の隙間13aに膨張鋼管18による第1加圧膨張体14を挿入配置したら、膨張鋼管18に注水スリーブ26を介して水(流体)を圧送して膨張させることにより、基礎11の外周部分をリフトアップする。ここで、膨張鋼管18に水を圧送するには、例えばナトム工法において用いられている公知の注水システムを用いることができる。この注水システムは、核となる高水圧発生装置として、好ましくは圧縮空気を動力源とするエアコンバータが用いられ、エア用ピストンと水用ピストンとを直結して、双方の面積比により水を加圧して送り出すようになっている。   And in this embodiment, if the 1st pressurization expansion body 14 by the expansion steel pipe 18 is inserted and arrange | positioned in the clearance gap 13a between the lower surface of the foundation 11 of the outer peripheral part of the residential building 10, and the surface layer part 12a of the foundation ground 12. Then, the outer peripheral portion of the foundation 11 is lifted up by pumping water (fluid) through the water injection sleeve 26 to the expanded steel pipe 18 and expanding it. Here, in order to pump water into the expanded steel pipe 18, for example, a known water injection system used in the Natom method can be used. In this water injection system, an air converter using compressed air as a power source is preferably used as a high water pressure generating device as a core, and water is added according to the area ratio of both by directly connecting an air piston and a water piston. It is designed to send out with pressure.
上述の第1工程によって、基礎11の外周部分をリフトアップすると、これに伴って、住宅建築物10の内側部分の基礎11の下面と基礎地盤12の表層部分12aとの間にも例えば20〜30mm程度の厚さt2の隙間13bが生じるので(図3(b)参照)、この内側部分の隙間13bを介して第2加圧膨張体15を基礎11の下方に挿入配置し、流体を圧送して膨張させることにより、内側部分の基礎11をリフトアップする第2工程を行う。   When the outer peripheral part of the foundation 11 is lifted up by the above-described first step, 20 to 20 between the lower surface of the foundation 11 of the inner part of the house building 10 and the surface layer part 12a of the foundation ground 12 along with this. Since a gap 13b having a thickness t2 of about 30 mm is generated (see FIG. 3B), the second pressurizing expansion body 15 is inserted and disposed below the foundation 11 via the gap 13b in the inner portion, and the fluid is pumped. Then, a second step of lifting up the foundation 11 of the inner portion is performed by expanding the base 11.
ずなわち、住宅建築物10の西側の部分の基礎11の、外周立上り部11aが配置される外周部分から内側部分に向かう適宜の位置を、第2加圧膨張体15の配設位置17bとして設定し(図1参照)、図5(a),(b)に示すように、基礎11の外側から内側に向けて、後述する膨張袋体20による第2加圧膨張体15を、例えば挿入補助板としての合板21によって上下から挟み込んだ状態で(図6(a),(b)参照)、住宅建築物10の内側部分の基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13bに挿入配置する。   In other words, an appropriate position of the foundation 11 of the west side portion of the residential building 10 from the outer peripheral portion where the outer peripheral rising portion 11a is arranged to the inner portion is set as the arrangement position 17b of the second pressure expansion body 15. As shown in FIGS. 5 (a) and 5 (b), for example, a second pressurizing inflatable body 15 by an inflating bag body 20 to be described later is inserted from the outside to the inside of the base 11, as shown in FIGS. In a state of being sandwiched from above and below by a plywood 21 as an auxiliary plate (see FIGS. 6A and 6B), between the lower surface of the foundation 11 of the inner part of the house building 10 and the surface layer part 12a of the foundation ground 12 Inserted into the gap 13b.
ここで、本実施形態では、第2工程において内側部分の基礎11の下面に配置される第2加圧膨張体15として、好ましくは扁平に畳まれた状態から内部に流体圧力が負荷されて膨張変形する膨張袋体20が用いられる。膨張袋体20は、例えば消防ホースに用いられるシート材料の材質と同様の材質のシート材料を用いて、内部に例えば0.2〜0.3MPa程度の高水力が負荷されても破断することがない状態で形成される。膨張袋体20は、図7(a)〜(c)に示すように、例えば塩化ビニル系材料によるターボリンからなる内層とポリエステル系材料からなる内層とを含むシート材料に各種の縫製を施すことにより、例えば幅300mm程度、長さ2000mm程度の縦長短冊状の平面形状を備えると共に、膨張時に例えば300mm程度の厚さまで膨張変形することが可能な、水密内袋と外袋とからなる二重構造の袋体として形成される。また膨張袋体20は、その一端部に注入口22が取り付けられると共に、上下の面20a,20bを密着させるようにして畳まれた膨張前の状態では、例えば10mm程度の厚さを有するように形成される。   Here, in this embodiment, as the 2nd pressurization expansion body 15 arrange | positioned in the lower surface of the foundation 11 of an inner part in a 2nd process, Preferably fluid pressure is loaded inside from the state folded flat, and it expand | swells A deformable inflatable bag body 20 is used. The inflatable bag body 20 is made of a sheet material similar to the material of the sheet material used for fire fighting hoses, for example, and can be broken even when a high hydraulic force of about 0.2 to 0.3 MPa is applied to the inside. It is formed in the state without. As shown in FIGS. 7A to 7C, the inflatable bag body 20 is formed by performing various kinds of sewing on a sheet material including, for example, an inner layer made of turbolin made of a vinyl chloride material and an inner layer made of a polyester material. For example, a double-layered structure comprising a watertight inner bag and an outer bag, which has a vertically long strip shape having a width of about 300 mm and a length of about 2000 mm, and can be inflated and deformed to a thickness of, for example, about 300 mm when inflated. It is formed as a bag. The inflatable bag body 20 has an inlet 22 attached to one end thereof, and has a thickness of, for example, about 10 mm in a state before being inflated so that the upper and lower surfaces 20a and 20b are in close contact with each other. It is formed.
さらに、本実施形態では、膨張袋体20は、基礎11aを住宅建築物11と共に押し上げる際のリフトアップ量として、例えば60〜100mm程度のリフトアップ量h2(図6(a),(b)参照)を確保できる変形量で膨量変形できるように設定されていることが好ましい。   Furthermore, in this embodiment, the expansion bag body 20 has a lift-up amount h2 of, for example, about 60 to 100 mm as a lift-up amount when the foundation 11a is pushed up together with the house building 11 (see FIGS. 6A and 6B). ) Is preferably set so that the amount of deformation can be deformed with a deformation amount capable of securing the above.
なお、第2工程において基礎11の内側部分の下面に配置される第2加圧膨張体16として、膨張袋体20を用いることにより、当該膨張袋体20の可撓性によって、基礎11の下方の隙間13bに沿って当該隙間13bの奥まで広い範囲に亘って面状に第2加圧膨張体14を敷設設置することが可能になる。また、畳まれた膨張袋体20を合板21によって上下から挟み込んだ状態で、膨張袋体20を基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13bに挿入配置することにより、挿入作業を容易にして、厚さの小さな隙間13bの奥まで、安定した状態で第2加圧膨張体14を面状に敷設することが可能になる。さらに、膨張袋体20は、基礎11をリフトアップする際に、基礎11によって上方から押し付けられつつ膨張変形して、その略全長に亘って面状に基礎11と接触しながら当該基礎11を押し上げるので、広範囲な接触面積を確保して、押し上げ時に基礎11から負荷される住宅建築物10の荷重を分散して効率良く支持しつつ、安定した状態で住宅建築物10を押し上げることが可能になる。   In addition, by using the expansion bag body 20 as the second pressurization expansion body 16 disposed on the lower surface of the inner portion of the base 11 in the second step, the flexibility of the expansion bag body 20 causes the bottom of the base 11 to be lowered. The second pressurizing expansion body 14 can be laid and installed in a planar shape over a wide range along the gap 13b to the back of the gap 13b. Moreover, in a state where the folded inflated bag body 20 is sandwiched from above and below by the plywood 21, the inflated bag body 20 is inserted into the gap 13b between the lower surface of the foundation 11 and the surface layer portion 12a of the foundation ground 12, The insertion work is facilitated, and the second pressurizing expansion body 14 can be laid in a planar state in a stable state up to the depth of the gap 13b having a small thickness. Furthermore, when the base 11 is lifted up, the inflatable bag body 20 is inflated and deformed while being pressed from above by the base 11, and pushes up the base 11 while being in contact with the base 11 in a planar shape over substantially the entire length thereof. Therefore, it is possible to secure a wide contact area and to push up the house building 10 in a stable state while dispersing and efficiently supporting the load of the house building 10 loaded from the foundation 11 at the time of pushing up. .
そして、本実施形態では、住宅建築物10の内側部分の基礎11の下面と、基礎地盤12の表層部分12aとの間の隙間13bに膨張袋体20による第2加圧膨張体15を挿入配置したら、膨張袋体20に注入口22を介して水(流体)を圧送して膨張させることにより、基礎11の内側部分をリフトアップする。ここで、膨張袋体20に水を圧送するには、上述の膨張鋼管18に用いたものと同様の注水システムを用いることができる。   And in this embodiment, the 2nd pressurization expansion body 15 by the expansion bag body 20 is inserted and arrange | positioned in the clearance gap 13b between the lower surface of the foundation 11 of the inner part of the residential building 10, and the surface layer part 12a of the foundation ground 12. Then, the inner part of the foundation 11 is lifted up by pumping water (fluid) into the inflatable bag body 20 via the inlet 22 and inflating it. Here, in order to pump water into the expansion bag body 20, a water injection system similar to that used for the above-described expansion steel pipe 18 can be used.
本実施形態では、上述の第2工程によって基礎11の内側部分をリフトアップしたら、これに伴って、住宅建築物10の内側部分の基礎11の下面と基礎地盤12の表層部分12aとの間には、さらに奥まで、膨張袋体20を挿入することが可能な例えば30mm程度の厚さの隙間13bが住宅建築物10の基礎11の下方に生じるので、この隙間13bを介して第3加圧膨張体16を住宅建築物10の内側部分のさらに奥まで挿入配置し、流体を圧送して膨張させることにより、さらに奥の部分の基礎11をリフトアップする第3工程を行う。   In this embodiment, if the inside part of the foundation 11 is lifted up by the above-mentioned 2nd process, in connection with this, between the lower surface of the foundation 11 of the inside part of the house building 10, and the surface layer part 12a of the foundation ground 12 Since a gap 13b having a thickness of about 30 mm, for example, into which the inflatable bag body 20 can be inserted further is formed below the foundation 11 of the residential building 10, the third pressure is applied through the gap 13b. The third step of lifting up the foundation 11 in the further back portion is performed by inserting and disposing the inflatable body 16 further into the inner portion of the house building 10 and pumping and expanding the fluid.
すなわち、住宅建築物10の西側の部分の基礎11の、外周立上り部11aが配置される外周部分から内側部分に向かうさらに奥の適宜の位置を、第3加圧膨張体16の配設位置17cとして設定し(図1参照)、第2加圧膨張体15の場合と同様に、基礎11の外側から内側に向けて、第2加圧膨張体15と同様の膨張袋体20による第3加圧膨張体16を、挿入補助板としての合板21によって上下から挟み込んだ状態で、住宅建築物10の内側部分の基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13bに挿入配置する。   That is, an appropriate position at the back of the foundation 11 of the west side portion of the residential building 10 from the outer peripheral portion where the outer peripheral rising portion 11a is arranged to the inner portion is provided as the arrangement position 17c of the third pressure expansion body 16. (See FIG. 1), and in the same manner as in the case of the second pressurizing and expanding body 15, the third pressurization by the inflating bag body 20 similar to the second pressurizing and expanding body 15 from the outside to the inside of the foundation 11 is performed. The pressure-expandable body 16 is inserted and arranged in a gap 13b between the lower surface of the foundation 11 in the inner portion of the house building 10 and the surface layer portion 12a of the foundation ground 12 in a state of being sandwiched from above and below by a plywood 21 as an insertion auxiliary plate. To do.
ここで、本実施形態では、第3工程において住宅建築物10の内側部分の基礎11の下面に配置される第3加圧膨張体16として、好ましくは扁平に畳まれた状態から内部に流体圧力が負荷されて膨張変形する、第2工程に用いたものと同様の膨張袋体20が用いられる。第3加圧膨張体16として用いる膨張袋体20は、例えば4000〜5500mm程度の長さを備えており、第2工程で用いた第2加圧膨張体15の膨張袋体20よりも長くなっていることにより、第3加圧膨張体16は、住宅建築物10の基礎11のさらに内側部分まで配置することが可能になる。   Here, in this embodiment, as the 3rd pressurizing expansion body 16 arrange | positioned in the lower surface of the foundation 11 of the inner part of the residential building 10 in a 3rd process, Preferably it is a fluid pressure inside from the state folded up flatly. The expansion bag body 20 similar to that used in the second step is used which is inflated and deformed when loaded. The expansion bag body 20 used as the third pressure expansion body 16 has a length of about 4000 to 5500 mm, for example, and is longer than the expansion bag body 20 of the second pressure expansion body 15 used in the second step. Thus, the third pressurizing expansion body 16 can be arranged up to a further inner portion of the foundation 11 of the residential building 10.
そして、本実施形態では、住宅建築物10の内側部分の基礎11の下面と、基礎地盤12の表層部分12aとの間の隙間13に膨張袋体20による第3加圧膨張体16を挿入配置したら、第2加圧膨張体16の場合と同様に、膨張袋体20に注入口22を介して水(流体)を圧送して膨張させることにより、基礎11のさらに奥の部分をリフトアップすることが可能になる。   And in this embodiment, the 3rd pressurization expansion body 16 by the expansion bag body 20 is inserted and arrange | positioned in the clearance gap 13 between the lower surface of the foundation 11 of the inner side part of the residential building 10, and the surface layer part 12a of the foundation ground 12. Then, as in the case of the second pressurizing inflatable body 16, water (fluid) is pumped through the inflating bag body 20 through the inlet 22 and inflated to lift up the further back portion of the foundation 11. It becomes possible.
上述の第1工程、第2工程、及び第3工程によって、沈下量が大きい例えば西側の部分をリフトアップして、住宅建築物10の沈下の修正を行ったら、本実施形態では、図8(a),(b)に示すように、かかるリフトアップによって生じた住宅建築物10の基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13に、モルタル、グラウト、発泡ウレタン等の固化材23を充填する作業を行う。   When the settlement of the residential building 10 is corrected by lifting up, for example, the west side portion where the settlement amount is large by the first step, the second step, and the third step described above, in this embodiment, FIG. As shown in a) and (b), in the gap 13 between the lower surface of the foundation 11 of the residential building 10 and the surface layer portion 12a of the foundation ground 12 generated by the lift-up, mortar, grout, urethane foam, etc. An operation of filling the solidifying material 23 is performed.
すなわち、好ましくは外周立上り部11aや内側立上り部11cが立設する部分の適宜箇所における基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13の適宜箇所に、例えば隙間13の厚さに応じた高さに積層したスペーサ24を挟み込んで、沈下修正した基礎11の高さを保持した状態とする。スペーサ24を挟み込む作業は、例えば膨張袋体20を僅かに過大に膨張させた状態で、基礎11の下面と基礎地盤12の表層部分12aとの間の隙間13の適宜箇所に、積層したスペーサ24を挿入配置した後に、膨張変形させた膨張袋体20から圧力を僅かに抜いて基礎11の下面を下げることによって、容易に行うことができる。スペーサ24を挟み込んだら、第1加圧膨張体14、第2加圧膨張体15、及び第3加圧膨張体16から水を抜いて収縮変形させた後に、これらを基礎11の下方の隙間13から撤去すると共に、隙間13を囲うようにして住宅建築物10の西側の部分の基礎11の周囲に固化材注入用型枠25を設置した後に、当該隙間13に、固化材23として例えばモルタルを注入充填し、これを固化させることにより、住宅建築物10を沈下修正した状態を強固に保持することが可能になる。   That is, preferably at the appropriate position of the gap 13 between the lower surface of the foundation 11 and the surface layer portion 12a of the foundation ground 12 at the appropriate position of the portion where the outer peripheral rising portion 11a and the inner rising portion 11c are erected, for example, the thickness of the gap 13 The spacer 24 stacked at a height corresponding to the height is sandwiched to maintain the height of the foundation 11 corrected for settlement. The operation of sandwiching the spacer 24 is performed by, for example, stacking spacers 24 at appropriate positions in the gap 13 between the lower surface of the foundation 11 and the surface layer portion 12a of the foundation ground 12 in a state where the expansion bag body 20 is slightly excessively expanded. After inserting and arranging, the pressure can be slightly removed from the inflated and deformed inflatable bag body 20 to lower the lower surface of the foundation 11, and this can be easily performed. When the spacer 24 is sandwiched, the first pressure expansion body 14, the second pressure expansion body 15, and the third pressure expansion body 16 are drained and contracted and deformed, and then these are compressed into the gap 13 below the foundation 11. After installing the solidification material injection mold 25 around the foundation 11 in the western part of the residential building 10 so as to surround the gap 13, for example, mortar is used as the solidification material 23 in the gap 13. By injecting and filling and solidifying this, it is possible to firmly maintain the state in which the residential building 10 has been corrected for settlement.
そして、上述の構成を備える本実施形態の建物の沈下修正工法によれば、多くの手間を要することなく、簡易な作業によって住宅建築物10の沈下した部分の基礎11を安定した状態で効果的にリフトアップして、住宅建築物10の沈下修正を容易に行うことができる。すなわち、本実施形態によれば、沈下した部分の住宅建築物10の基礎11の下面と、基礎地盤12の表層部分12aとの間に形成した隙間13a,13bに、扁平な断面形状から内部に流体圧力が負荷されて膨張変形する加圧膨張体14,15,16を挿入配置し、これらの加圧膨張体14,15,16に流体を圧送して膨張変形させるだけの作業によって、手間のかかるジャッキやジャッキ受け金具の設置作業を要することなく、簡易且つ容易に住宅建築物10の沈下修正を行うことが可能になる。   And according to the building subsidence correction method of the present embodiment having the above-described configuration, it is effective in a stable state of the foundation 11 of the subsidized portion of the residential building 10 by a simple operation without requiring much labor. Thus, the settlement of the residential building 10 can be easily corrected. In other words, according to the present embodiment, the gaps 13a and 13b formed between the lower surface of the foundation 11 of the subsidized residential building 10 and the surface layer portion 12a of the foundation ground 12 are changed from a flat cross-sectional shape to the inside. By inserting and arranging the pressurizing expansion bodies 14, 15, and 16 that are expanded and deformed when fluid pressure is applied, and by simply pumping the fluid to these pressurizing expansion bodies 14, 15, and 16 to perform the expansion and deformation, labor is reduced. It is possible to easily and easily correct the settlement of the house building 10 without the need to install such a jack or jack bracket.
また、本実施形態によれば、加圧膨張体14,15,16は、基礎11によって上方から押し付けられつつ膨張変形して、線状又は面状に基礎11と接触しながら当該基礎11を押し上げるので、広範囲な接触面積(接触延長)を確保して、安定した状態で住宅建築物10を押し上げることが可能になる。   Moreover, according to this embodiment, the pressurizing expansion bodies 14, 15, and 16 expand and deform while being pressed from above by the base 11, and push up the base 11 while contacting the base 11 in a linear or planar shape. Therefore, it is possible to secure a wide contact area (contact extension) and push up the house building 10 in a stable state.
さらに、本実施形態によれば、加圧膨張体14,15,16は、注水システムから圧送される加圧水の圧力や供給量を管理することにより、これらの膨張量を容易にコントロールすることができるので、基礎11のリフトアップ量を制御して、精度の良い住宅建築物10の沈下修正を行うことが可能になる。   Furthermore, according to this embodiment, the pressure expansion bodies 14, 15, and 16 can easily control the expansion amount by managing the pressure and supply amount of the pressurized water pumped from the water injection system. Therefore, it becomes possible to correct the settlement of the residential building 10 with high accuracy by controlling the lift-up amount of the foundation 11.
さらにまた、本実施形態によれば、住宅建築物10の基礎11の下面や基礎地盤12の表層部分12と、加圧膨張体14,15,16との間に、鉄板19等による反力受けプレートを介在させて加圧膨張体を膨張変形させることができるので、これらの反力受けプレートによって、リフトアップ時に基礎地盤12の表層部分12や基礎11からの反力を安定して支持することが可能になると共に、特に基礎地盤12の表層部分12との間に介在して反力受けプレートが設けられていることにより、加圧膨張体14,15,16の表層部分12への食い込みを反力受けプレートによる大きな接地面積によって回避して、所望のリフトアップ量を容易に確保することが可能になる。   Furthermore, according to the present embodiment, the reaction force is received by the iron plate 19 or the like between the lower surface of the foundation 11 of the residential building 10 or the surface layer portion 12 of the foundation ground 12 and the pressurized expansion bodies 14, 15, 16. Since the pressure expansion body can be expanded and deformed by interposing a plate, the reaction force from the surface layer portion 12 and the foundation 11 of the foundation ground 12 can be stably supported by these reaction force receiving plates at the time of lift-up. In particular, the reaction force receiving plate is provided between the foundation ground 12 and the surface layer portion 12, so that the pressurized expansion bodies 14, 15, 16 can bite into the surface layer portion 12. It is possible to avoid a large ground contact area by the reaction force receiving plate and easily secure a desired lift-up amount.
また、本実施形態によれば、加圧膨張体14,15,16を膨張させる流体として水を用いているので、油等を用いる場合と比較して、環境に与える影響がほとんどなく、加圧水を供給する公知の注水システムは、例えばライトバンに積載できる程度のコンパクトな形状を有しており、搬入が容易でスムーズに作業を行うことが可能になる。   In addition, according to the present embodiment, water is used as a fluid for expanding the pressurizing expansion bodies 14, 15, and 16, so that there is almost no influence on the environment as compared with the case where oil or the like is used. The known water injection system to be supplied has a compact shape that can be loaded on a light van, for example, and can be carried in easily and smoothly.
なお、本発明は上記実施形態に限定されることなく種々の変更が可能である。例えば、本発明の建物の沈下修正工法は、外周部分の基礎をリフトアップする第1工程と内側部分の基礎をリフトアップする第2工程とに分けて行う必要は必ずしもなく、第1工程のみで十分に沈下修正することが可能であれば、第2工程や第3工程をさらに行う必要はない。また、建物の基礎の下面と基礎地盤の表層部分との間に加圧膨張体を挿入配置するための隙間を形成する際に、ジャッキを使用することもできる。さらに、沈下修正される建物は、住宅建築物である必要は必ずしもなく、加圧膨張体に加圧供給される流体は、水以外の例えば油等であっても良い。   The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the subsidence correction method for a building according to the present invention does not necessarily need to be performed separately in the first step of lifting up the foundation of the outer peripheral portion and the second step of lifting up the foundation of the inner portion, but only in the first step. If the subsidence can be corrected sufficiently, there is no need to further perform the second step and the third step. Moreover, when forming the clearance gap for inserting and arrange | positioning a pressurization expansion body between the lower surface of the foundation of a building, and the surface layer part of a foundation ground, a jack can also be used. Furthermore, the building whose subsidence is corrected is not necessarily a residential building, and the fluid supplied under pressure to the pressurized expansion body may be, for example, oil other than water.
本発明の好ましい一実施形態に係る沈下修正工法における加圧膨張体の配設位置を説明する住宅建築物の基礎の部分透視上面図である。It is a partial see-through top view of the foundation of a residential building explaining the arrangement position of the pressurization expansion object in the settlement correction construction method concerning one desirable embodiment of the present invention. 外周部分の基礎をリフトアップする第1工程において、基礎の下面と、基礎地盤の表層部分との間の隙間に加圧膨張体を挿入配置した状況を説明する(a)は部分断面図、(b)は部分上面図である。(A) is a partial cross-sectional view for explaining a situation in which a pressurized expansion body is inserted and disposed in a gap between the lower surface of the foundation and the surface layer portion of the foundation ground in the first step of lifting up the foundation of the outer peripheral portion. b) is a partial top view. (a),(b)は、基礎の外周部分をリフトアップする第1工程を説明する部分断面図である。(A), (b) is a fragmentary sectional view explaining the 1st process of lifting up the outer peripheral part of a foundation. (a)は膨張鋼管の斜視図、(b)は(a)のA−Aに沿った断面図である。(A) is a perspective view of an expanded steel pipe, (b) is sectional drawing along AA of (a). 基礎の内側部分をリフトアップする第2工程において、基礎の下面と、基礎地盤の表層部分との間の隙間に加圧膨張体を挿入配置した状況を説明する(a)は部分断面図、(b)は部分平面図である。(A) is a partial cross-sectional view for explaining a situation in which a pressurizing expansion body is inserted and arranged in a gap between the lower surface of the foundation and the surface layer portion of the foundation ground in the second step of lifting the inner portion of the foundation. b) is a partial plan view. (a),(b)は、基礎を内側部分をリフトアップする第2工程を説明する部分断面図である。(A), (b) is a fragmentary sectional view explaining the 2nd process of lifting up the inner part of a foundation. (a)は膨張袋体の断面図、(b)は底面図、(c)は(d)を右側から視た側面図である。(A) is sectional drawing of an expansion | swelling bag body, (b) is a bottom view, (c) is the side view which looked at (d) from the right side. リフトアップにより形成された基礎と基礎地盤の表層部分との間の隙間に固化材を充填する工程を説明する(a)は部分透視上面図、(b)は断面図である。(A) is a partial perspective top view, (b) is sectional drawing explaining the process of filling the clearance gap between the foundation formed by the lift-up and the surface layer part of a foundation ground.
符号の説明Explanation of symbols
10 住宅建築物(建物)
11 基礎
12 基礎地盤
12a 基礎地盤の表層部分
13,13a,13b 基礎の下面と基礎地盤の表層部分との間の隙間
14 第1加圧膨張体
15 第2加圧膨張体
16 第3加圧膨張体
17a 第1加圧膨張体の配設位置
17b 第2加圧膨張体の配設位置
17c 第3加圧膨張体の配設位置
18 膨張鋼管
19 鉄板(反力受けプレート)
20 膨張袋体
21 合板(挿入補助板)
22 注入口
23 固化材
24 固化材注入用型枠
26 注水スリーブ
10 residential buildings (buildings)
DESCRIPTION OF SYMBOLS 11 Foundation 12 Foundation ground 12a Surface layer part 13,13a, 13b of foundation ground 14 Crevice 14 between the lower surface of foundation and surface layer part of foundation ground 1st pressurized expansion body 15 2nd pressurized expansion body 16 3rd pressurized expansion Body 17a Arrangement position 17b of the first pressurization expansion body Arrangement position 17c of the second pressurization expansion body 18 Arrangement position 18 of the third pressurization expansion body Expanded steel pipe 19 Iron plate (reaction force receiving plate)
20 Inflatable bag 21 Plywood (insertion auxiliary plate)
22 Inlet 23 Solidified material 24 Solidified material injection mold 26 Water injection sleeve

Claims (10)

  1. 沈下した部分の建物の基礎の下面と、基礎地盤の表層部分との間に隙間を形成して、該隙間に、扁平な断面形状から内部に流体圧力が負荷されて膨張変形する加圧膨張体を挿入配置し、該加圧膨張体に流体を圧送して膨張変形させることにより、前記沈下した部分の建物の基礎をリフトアツプする工程を含む建物の沈下修正工法。   A pressurized expansion body that forms a gap between the lower surface of the foundation of the building in the subsidence and the surface layer portion of the foundation ground, and in which the fluid pressure is loaded into the gap from the flat cross-sectional shape to expand and deform The building subsidence correction method includes the step of lifting up the foundation of the subsidence of the building by inserting and arranging a fluid to the pressurized expansion body to cause expansion and deformation.
  2. 前記加圧膨張体が、扁平にプレスされた断面形状から内部に流体圧力が負荷されて膨張変形する膨張鋼管である請求項1に記載の建物の沈下修正工法。   The building subsidence correction method according to claim 1, wherein the pressurized expansion body is an expanded steel pipe that expands and deforms when a fluid pressure is applied to the inside from a cross-sectional shape pressed flat.
  3. 前記加圧膨張体が、扁平に畳まれた状態から内部に流体圧力が負荷されて膨張変形する膨張袋体である請求項1に記載の建物の沈下修正工法。   The building subsidence correction method according to claim 1, wherein the pressurized expansion body is an expansion bag body that is inflated and deformed when a fluid pressure is applied to the inside from a flat folded state.
  4. 前記建物の基礎が、べた基礎である請求項1〜3のいずれかに記載の建物の沈下修正工法。   The building settlement correction method according to any one of claims 1 to 3, wherein the foundation of the building is a solid foundation.
  5. 前記基礎地盤の表層部分が、表層改良工法によって形成された面状固結体である請求項1〜4のいずれかに記載の建物の沈下修正工法。   The building subsidence correction method according to any one of claims 1 to 4, wherein the surface layer portion of the foundation ground is a planar solid body formed by a surface layer improvement method.
  6. 前記加圧膨張体に圧送される流体が、水である請求項1〜5のいずれかに記載の建物の沈下修正工法。   The building subsidence correction method according to any one of claims 1 to 5, wherein the fluid pumped to the pressurized expansion body is water.
  7. 前記建物の基礎の下面及び/又は前記基礎地盤の表層部分と、前記加圧膨張体との間に反力受けプレートを介在させて前記加圧膨張体を膨張変形させる請求項1〜6のいずれかに記載の建物の沈下修正工法。   Any of Claims 1-6 which make the said pressurization expansion body expand and deform by interposing a reaction force receiving plate between the lower surface of the foundation of the said building and / or the surface layer part of the said foundation ground, and the said pressurization expansion body. The subsidence correction method for buildings described in Crab.
  8. 沈下した部分の建物の外周部分の基礎の下面と、基礎地盤の表層部分との間に隙間を形成して、該隙間に前記加圧膨張体を挿入配置し、流体を圧送して膨張させることにより、前記外周部分の基礎をリフトアップする第1工程と、該第1工程によって形成された建物の内側部分の基礎の下面と基礎地盤の表層部分との間の隙間を介して、前記加圧膨張体を建物の内側部分に挿入配置し、流体を圧送して膨張させることにより、前記内側部分の基礎をリフトアップする第2工程とを含む請求項1〜7のいずれかに記載の建物の沈下修正工法。   A gap is formed between the lower surface of the foundation of the outer peripheral part of the building in the sinked part and the surface layer part of the foundation ground, and the pressurized expansion body is inserted and arranged in the gap, and the fluid is pumped and expanded. The first step of lifting up the foundation of the outer peripheral portion, and the pressurization through the gap between the lower surface of the foundation of the inner portion of the building and the surface layer portion of the foundation ground formed by the first step A second step of lifting up the foundation of the inner part by inserting and disposing an inflatable body into the inner part of the building and pumping and inflating a fluid to expand the foundation of the building according to claim 1. Subsidence correction method.
  9. 前記第1工程で用いる加圧膨張体が前記膨張鋼管であり、前記第2工程で用いる加圧膨張体が前記膨張袋体である請求項8に記載の建物の沈下修正工法。   The building subsidence correction method according to claim 8, wherein the pressure expansion body used in the first step is the expanded steel pipe, and the pressure expansion body used in the second step is the expansion bag body.
  10. 前記加圧膨張体を膨張変形させて、前記沈下した部分の建物の基礎をリフトアップすることにより形成された前記基礎と基礎地盤の表層部分との間の隙間に、モルタル、グラウト、発泡ウレタン等の固化材を充填する工程を含む請求項1〜9のいずれかに記載の建物の沈下修正工法。   Mortar, grout, urethane foam, etc. in the gap between the foundation and the surface layer portion of the foundation ground formed by expanding and deforming the pressurized expansion body and lifting the foundation of the sinking part of the building The subsidence correction method for a building according to any one of claims 1 to 9, further comprising a step of filling the solidified material.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013231329A (en) * 2012-05-01 2013-11-14 Sumitomo Forestry Co Ltd Building subsidence correction construction method
JP2014080780A (en) * 2012-10-16 2014-05-08 Sumitomo Forestry Co Ltd Settlement correction foundation structure of building
JP2015137500A (en) * 2014-01-23 2015-07-30 鹿島建設株式会社 Method of constructing reinforcement slab

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Publication number Priority date Publication date Assignee Title
JPH05179670A (en) * 1991-12-30 1993-07-20 Sumitomo Electric Ind Ltd Leveling for structure
JPH0960027A (en) * 1995-08-28 1997-03-04 Arai Gumi Ltd Method for restoring building from unequal settlement
JPH10183644A (en) * 1996-12-20 1998-07-14 Akiyutetsuku Kk Foundation construction for structure
JP2005120771A (en) * 2003-10-20 2005-05-12 So Service:Kk Building structure for adjusting level and level adjusting method for this building
JP2005213904A (en) * 2004-01-30 2005-08-11 Ohbayashi Corp Bearing capacity increasing method, construction method of sheet pile foundation, sheet pile foundation and bridge

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05179670A (en) * 1991-12-30 1993-07-20 Sumitomo Electric Ind Ltd Leveling for structure
JPH0960027A (en) * 1995-08-28 1997-03-04 Arai Gumi Ltd Method for restoring building from unequal settlement
JPH10183644A (en) * 1996-12-20 1998-07-14 Akiyutetsuku Kk Foundation construction for structure
JP2005120771A (en) * 2003-10-20 2005-05-12 So Service:Kk Building structure for adjusting level and level adjusting method for this building
JP2005213904A (en) * 2004-01-30 2005-08-11 Ohbayashi Corp Bearing capacity increasing method, construction method of sheet pile foundation, sheet pile foundation and bridge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013231329A (en) * 2012-05-01 2013-11-14 Sumitomo Forestry Co Ltd Building subsidence correction construction method
JP2014080780A (en) * 2012-10-16 2014-05-08 Sumitomo Forestry Co Ltd Settlement correction foundation structure of building
JP2015137500A (en) * 2014-01-23 2015-07-30 鹿島建設株式会社 Method of constructing reinforcement slab

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