JP2769484B2 - Building foundation method - Google Patents
Building foundation methodInfo
- Publication number
- JP2769484B2 JP2769484B2 JP1022037A JP2203789A JP2769484B2 JP 2769484 B2 JP2769484 B2 JP 2769484B2 JP 1022037 A JP1022037 A JP 1022037A JP 2203789 A JP2203789 A JP 2203789A JP 2769484 B2 JP2769484 B2 JP 2769484B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- foundation
- building
- base
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Foundations (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、建物（主としてプレハブ住宅）用基礎工法
に関する。The present invention relates to a foundation method for buildings (mainly prefabricated houses).
（従来の技術） われわれは、軟弱地盤あるいは硬質地盤の表上を改良
して建物用地盤を構成する工法を特公昭58−14896号公
報で提供している。(Prior Art) We provide a construction method for constructing a building ground by improving the surface of soft ground or hard ground in Japanese Patent Publication No. 58-14896.
この発明は、地盤安定化処理剤を用いて複数層の地盤
を改良し、建物用地盤をなす工法である。The present invention is a method for improving a plurality of layers of ground by using a ground stabilizing agent to form a building ground.
（発明が解決しようとする課題） この従来技術では、建物荷重に関係なく、改良した積
層地盤が時間の経過とともに自然に変形し、それが不均
一な場合、建物の不同沈下となることが多い。軟弱地盤
においてこの問題が顕著にあらわれる。盛土材料の選定
や締め固めを均一に、しかも充分行わなくてはならない
ので、施工管理に手間がかかる上に、施工コストがアッ
プする。(Problems to be Solved by the Invention) In this conventional technique, regardless of the building load, the improved laminated ground naturally deforms with the passage of time, and when it is uneven, the building often sinks unevenly. . This problem is prominent in soft ground. Since the selection and compaction of the embankment material must be performed uniformly and sufficiently, the construction management is troublesome and the construction cost is increased.
本発明は、このような従来技術の有する課題を解決す
るものである。The present invention solves such problems of the related art.
（課題を解決するための手段） 本発明建物用基礎工法は、硬質の現状地盤の上に、硬
質の現状地盤上の盛土の上に、あるいは現状地盤を掘削
した硬質の掘削地面の上に軽量発泡コンクリートからな
る基盤を形成し、この基盤の上に建物用のコンクリート
基礎を構築するものである。(Means for Solving the Problems) The foundation method for a building according to the present invention is a method in which a lightweight construction method is used on a hard existing ground, on an embankment on a hard existing ground, or on a hard excavated ground excavating the existing ground. A foundation made of foamed concrete is formed, and a concrete foundation for a building is constructed on the foundation.
（作用） 軽量発泡コンクリートは土と比べて単位体積重量が軽
い。したがって、軽量発泡コンクリートからなる基盤は
旧地盤への負担を大変少なくしている。さらに、一軸圧
縮強度が次の数倍以上にも達し、建物荷重を軽減、分散
させて下部へ伝える。(Action) Lightweight foamed concrete has a lower unit volume weight than soil. Therefore, the base made of lightweight foamed concrete greatly reduces the burden on the old ground. Furthermore, the uniaxial compressive strength reaches several times higher than the following, and the building load is reduced, dispersed and transmitted to the lower part.
（実施例） 具体的な実施例を説明する前に、本発明建物用基礎工
法に用いる軽量発泡コンクリートについて説明する。(Example) Before describing a specific example, a lightweight foam concrete used in the foundation method for a building according to the present invention will be described.
軽量発泡コンクリートは、セメントマトリックス中に
多量の微細な気泡群を含有させたものである。この軽量
発泡コンクリートは、スラリー装置と発泡装置を搭載し
たプラントを用いて現場施工にて実施する。軽量発泡コ
ンクリートの配合例を次の表１に示す。Lightweight foamed concrete contains a large amount of fine cells in a cement matrix. This lightweight foamed concrete is carried out on site by using a plant equipped with a slurry device and a foaming device. Table 1 below shows examples of the composition of the lightweight foam concrete.
そして、この配合による軽量発泡コンクリートの圧縮
強度などの性能を分析して次の表２に示す。 Then, the performance such as the compressive strength of the lightweight foamed concrete by this blending was analyzed and the results are shown in Table 2 below.
以下、本発明建物用基礎工法の第１実施例ないし第３
実施例を詳説する。 Hereinafter, the first to third embodiments of the foundation method for buildings according to the present invention will be described.
Examples will be described in detail.
〔第１実施例〕 第１図の断面図で示している。[First Embodiment] FIG. 1 is a sectional view of FIG.
現状地盤１上に軽量発泡コンクリートからなる基盤２
を形成し、この基盤２の上に建物用のコンクリート基礎
３を構築する建物用基礎工法である。Base 2 made of lightweight foam concrete on current ground 1
Is formed, and a concrete foundation 3 for a building is constructed on the base 2.
現状地盤１が硬質の場合に行われる。なお、地表に軟
弱地盤があると、この軟弱地盤は取除いておくとよい。This is performed when the current ground 1 is hard. If there is soft ground on the ground, it is advisable to remove this soft ground.
メタルフォームの型枠を用いて現状地盤１上に軽量発
泡コンクリートからなる基盤２を形成する。建物の外周
基礎３を構築する直下からこの外周基礎３に囲まれた全
域に基盤２を形成するベタ状改良（盛土の土に替えてベ
タ状基盤21を形成する）と、建物用基礎（外周基礎や間
仕切基礎などを含む）３を構築する直下のみに基盤２を
形成する布状改良とがある。A base 2 made of lightweight foam concrete is formed on the current ground 1 using a metal foam formwork. A solid improvement (forming a solid base 21 in place of embankment soil) to form a base 2 in the entire area surrounded by the outer foundation 3 from immediately below the outer foundation 3 of the building, and a building foundation (outer periphery) There is a cloth-like improvement in which the base 2 is formed only immediately under the construction of the base 3 (including the base and the partition base).
基盤２は上に建物用基礎３を構築するものであるか
ら、その横幅はこの建物用基礎３のベース31よりも広く
形成している。符号32は建物用基礎３の立上り部であ
る。Since the base 2 is for constructing the building foundation 3 thereon, the width thereof is wider than the base 31 of the building foundation 3. Reference numeral 32 denotes a rising portion of the building foundation 3.
盛土４はこのような基盤２を形成したのち施工する
が、場合によっては盛土施工を行ったのち、基盤２を形
成してよいこともちろんである。The embankment 4 is constructed after such a base 2 is formed. However, in some cases, the base 2 may be formed after the embankment is constructed.
〔第２実施例〕 第２図の断面図で示している。第１実施例と同じ構成
部分には同じ符号を用いる。[Second embodiment] This is shown in the sectional view of FIG. The same reference numerals are used for the same components as in the first embodiment.
現状地盤１上に盛土４をし、この盛土４の上に軽量発
泡コンクリートからなる基盤２を形成し、この基盤２の
上に建物用のコンクリート基礎３を構築する建物用基礎
工法である。つまり、現状地盤１と基盤２との間に盛土
４をサンドイッチした構造にしている。At present, an embankment 4 is formed on the ground 1, a base 2 made of lightweight foamed concrete is formed on the embankment 4, and a concrete foundation 3 for a building is constructed on the base 2. That is, the embankment 4 is sandwiched between the current ground 1 and the base 2.
現状地盤１が硬質で、しかも大幅な盛土４をしなくて
はならない場合に行われる。この盛土４も地盤安定化処
理剤を用いて地盤改良しておけば、より効果が上がる。This is performed when the current ground 1 is hard and a large embankment 4 has to be formed. The effect of the embankment 4 can be further improved if the ground is improved using a ground stabilizing agent.
なお、地表に軟弱地盤があると、この軟弱地盤は取除
いておくとよい。If there is soft ground on the ground, it is advisable to remove this soft ground.
メタルフォームの型枠を用いて盛土４上に軽量発泡コ
ンクリートからなる基盤２を形成する。この実施例にお
いても、建物の外周基礎３を構築する直下からこの外周
基礎３に囲まれた全域に基盤２を形成するベタ状改良
（ベタ状基盤21を形成する）と、建物用基礎（外周基礎
や間仕切基礎などを含む）３を構築する直下のみに基盤
２を形成する布状改良とがある。The base 2 made of lightweight foam concrete is formed on the embankment 4 using a metal foam formwork. Also in this embodiment, a solid improvement (forming a solid base 21) for forming the base 2 from immediately below the outer foundation 3 of the building to the entire area surrounded by the outer foundation 3, and a building foundation (perimeter) There is a cloth-like improvement in which the base 2 is formed only immediately under the construction of the base 3 (including the base and the partition base).
〔第３実施例〕 第３図の断面図で示している。第１実施例および第２
実施例と同じ構成部分には同じ符号を用いる。Third Embodiment FIG. 3 is a sectional view of FIG. First Embodiment and Second Embodiment
The same reference numerals are used for the same components as those in the embodiment.
現状地盤１を掘削５し、掘削地面51上に軽量発泡コン
クリートからなる基盤２を形成し、この基盤２の上に建
物用のコンクリート基礎３を構築する建物用基礎工法で
ある。At present, this is a building foundation method in which a ground 1 is excavated 5, a foundation 2 made of lightweight foamed concrete is formed on an excavated ground 51, and a concrete foundation 3 for a building is constructed on the foundation 2.
現状地盤１が硬質の場合はそのまま掘削５すればよい
が、現状地盤１の表土が軟弱な場合はこの軟弱地盤を取
除いておくとよい。If the current ground 1 is hard, the excavation 5 may be performed as it is, but if the topsoil of the current ground 1 is soft, the soft ground may be removed.
この実施例においても、建物の外周基礎３に囲まれた
全域に基盤２を形成するベタ状改良（ベタ状基盤21を形
成する）と、建物用基礎（外周基礎や間仕切基礎などを
含む）３を構築する直下のみに基盤２を形成する布状改
良とがある。Also in this embodiment, a solid improvement (forming a solid base 21) for forming the base 2 in the entire area surrounded by the outer peripheral foundation 3 of the building, and a building foundation (including the outer peripheral foundation and the partition foundation) 3 There is a cloth-like improvement in which the base 2 is formed only directly under the construction.
現状地盤１を掘削して基盤2,21を形成する場合、掘削
部分（布状改良の場合、基礎根伐り底）に軽量発泡コン
クリートを流し込むのみで型枠なしで基盤2,21を形成す
ることができる。なお、軟弱地盤を広範囲に取除いた
（掘削した）掘削地面51上に基盤2,21を形成する場合、
メタルフォームなどの型枠を用いる。At present, when excavating the ground 1 to form the bases 2 and 21, the bases 2 and 21 are formed without the formwork only by pouring lightweight foamed concrete into the excavated part (in the case of cloth-like improvement, the bottom of the foundation cut). Can be. In addition, when the bases 2 and 21 are formed on the excavated ground 51 where the soft ground has been removed (excavated) in a wide area,
Use a form such as metal foam.
上記の各実施例に共通した施工手段を説明する。 Construction means common to the above embodiments will be described.
プラントで軽量発泡コンクリートのスラリーをつく
り、打設現場にポンプで圧送する。A slurry of lightweight foam concrete is made at the plant and pumped to the casting site.
天端の一発仕上げはむずかしいのでレベラー仕上げや
モルタル仕上げを行う。One-shot finish at the top is difficult, so leveler finish or mortar finish is used.
ビニールシートをかけて約10時間くらい天端養生する
と、天端面に人が乗っても異常が生じないくらいに固化
する。したがって、翌日には次の施工が可能となる。After curing for about 10 hours with a vinyl sheet on it, it will solidify so that no abnormalities occur even if a person rides on the top. Therefore, the next day, the next construction is possible.
（発明の効果） 軽量発泡コンクリートからなる基盤は土と比べて単位
体積重量が軽い。したがって、本発明建物用基礎工法に
おいては、旧地盤に与える負担が軽くなり表層地盤の長
期の安定が図れる。(Effect of the Invention) The base made of lightweight foamed concrete has a lighter unit weight than soil. Therefore, in the building foundation method of the present invention, the burden on the old ground is reduced, and the long term stability of the surface ground can be achieved.
地盤安定化処理剤を用いる技術に比べて施工性がよ
く、コストダウンが図れる。また、建物用のコンクリー
ト基盤の下にぐり石を用いないため、この点からも施工
性がよくてコストダウンが図れる。The workability is better and the cost can be reduced as compared with the technology using the ground stabilizing agent. In addition, since no cobblestone is used under the concrete base for the building, the workability is good and the cost can be reduced from this point.
図面は本発明建物用基礎工法の実施例を示し、第１図は
第１実施例の断面図、第２図は第２実施例の断面図、第
３図は第３実施例の断面図である。 １…現状地盤 2,21…軽量発泡コンクリートからなる基盤 ３…建物用のコンクリート基礎 ４…盛土The drawings show an embodiment of the foundation method of the present invention, wherein FIG. 1 is a sectional view of the first embodiment, FIG. 2 is a sectional view of the second embodiment, and FIG. 3 is a sectional view of the third embodiment. is there. 1: Current ground 2,21: Foundation made of lightweight foamed concrete 3: Concrete foundation for building 4: Embankment
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) E02D 27/01 E02D 27/28 E02D 27/34Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) E02D 27/01 E02D 27/28 E02D 27/34
Claims (3)
軟弱地盤を取り除いた硬質の現状地盤上に軽量発泡コン
クリートからなる基盤を形成し、この基盤の上に建物用
のコンクリート基礎を構築することを特徴とする建物用
基礎工法。Claims: 1. A soft ground is removed from an existing ground, a foundation made of lightweight foamed concrete is formed on the hard existing ground from which the soft ground is removed, and a concrete foundation for a building is constructed on the foundation. A foundation method for buildings characterized by the following.
軟弱地盤を取り除いた硬質の現状地盤上に盛土をし、こ
の盛土の上に軽量発泡コンクリートからなる基盤を形成
し、この基盤の上に建物用のコンクリート基礎を構築す
ることを特徴とする建物用基礎工法。2. The soft ground is removed from the current ground, the embankment is formed on the hard current ground from which the soft ground has been removed, a base made of lightweight foam concrete is formed on the fill, and the base is formed on the base. A foundation method for a building, characterized by constructing a concrete foundation for the building.
軟弱地盤を取り除いた硬質の現状地盤を掘削し、この掘
削地面上に軽量発泡コンクリートのスラリーを打設し
て、この軽量発泡コンクリートからなる基盤を形成し、
この基盤の上に建物用のコンクリート基礎を構築するこ
とを特徴とする建物用基礎工法。3. The soft ground is removed from the existing ground, the hard existing ground from which the soft ground has been removed is excavated, and a slurry of the lightweight foamed concrete is poured onto the excavated ground to form the lightweight foamed concrete. Form the foundation,
A building foundation method comprising building a concrete foundation for the building on this foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1022037A JP2769484B2 (en) | 1989-01-30 | 1989-01-30 | Building foundation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1022037A JP2769484B2 (en) | 1989-01-30 | 1989-01-30 | Building foundation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02200923A JPH02200923A (en) | 1990-08-09 |
| JP2769484B2 true JP2769484B2 (en) | 1998-06-25 |
Family
ID=12071753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1022037A Expired - Fee Related JP2769484B2 (en) | 1989-01-30 | 1989-01-30 | Building foundation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2769484B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942357B (en) * | 2021-01-28 | 2022-06-10 | 中国电建集团华东勘测设计研究院有限公司 | Ultra-light foam concrete deep cushion layer using waste foam particles as filler and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0711131B2 (en) * | 1987-09-24 | 1995-02-08 | 小野田セメント株式会社 | Basic construction method |
| JPH02120417A (en) * | 1988-10-27 | 1990-05-08 | Natl House Ind Co Ltd | Foundation structure of building |
-
1989
- 1989-01-30 JP JP1022037A patent/JP2769484B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02200923A (en) | 1990-08-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |