JPH0473484B2 - - Google Patents
Info
- Publication number
- JPH0473484B2 JPH0473484B2 JP28571986A JP28571986A JPH0473484B2 JP H0473484 B2 JPH0473484 B2 JP H0473484B2 JP 28571986 A JP28571986 A JP 28571986A JP 28571986 A JP28571986 A JP 28571986A JP H0473484 B2 JPH0473484 B2 JP H0473484B2
- Authority
- JP
- Japan
- Prior art keywords
- soil
- improved soil
- ground
- solidification material
- improved
- 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
Links
- 239000002689 soil Substances 0.000 claims description 68
- 239000000463 material Substances 0.000 claims description 26
- 238000007711 solidification Methods 0.000 claims description 18
- 230000008023 solidification Effects 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 15
- 238000005056 compaction Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 241000718541 Tetragastris balsamifera Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- YPHMISFOHDHNIV-FSZOTQKASA-N cycloheximide Chemical compound C1[C@@H](C)C[C@H](C)C(=O)[C@@H]1[C@H](O)CC1CC(=O)NC(=O)C1 YPHMISFOHDHNIV-FSZOTQKASA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、軟弱地盤に起因する建物の不等沈
下、あるいはコンクリート基礎の破壊防止等を目
的とした建築用地盤改良工法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ground improvement method for construction aimed at preventing uneven settlement of buildings due to soft ground or destruction of concrete foundations.
（従来の技術）
従来、軟弱地盤に住宅等を築造する場合、べた
基礎、くい基礎等で地盤対策を行つていた。(Prior Art) Conventionally, when constructing a house or the like on soft ground, ground countermeasures have been taken using slab foundations, pile foundations, etc.
（発明が解決しようとする問題点）
べた基礎は砂質地盤においては効果があり、粘
土性地盤においては接地厚が軽減できる効果はあ
るものの、工費が極めて高く不経済である。(Problems to be Solved by the Invention) A solid foundation is effective in sandy ground, and in clay ground it is effective in reducing the ground contact thickness, but the construction cost is extremely high and it is uneconomical.
また、くい基礎は打ち込み時の騒音と震動とに
よる環境公害問題が生じ、施工費用が建物総費用
と比べてかなり高くなつて不経済な工法である。 In addition, pile foundations cause environmental pollution problems due to noise and vibration during driving, and the construction cost is considerably higher than the total building cost, making it an uneconomic construction method.
（問題点を解決するための手段）
本発明建築用地盤改良工法は、建築用地全域に
わたる現状地盤を掘削して約300〜500mmくらいの
厚さの表土を取除き、このように表土を取除いた
地盤のベース底に適量の固化材を散布した後、こ
のベース底を約300〜600mmくらいの深さに掘削し
て掘削土と固化材を混合攪拌して第一改良土と
し、このように混合攪拌した第一改良土の表面を
均らして仮転圧を行い、この第一改良土の上に質
のよい新たな土砂を適当な厚さ敷設し、この新た
な土砂の上に適量の固化材を散布した後この固化
材と新たな土砂を混合攪拌することにより第二改
良土となし、この第二改良土の表面を均らして仮
転圧を行い、次いで第二改良土表面のレベル調整
を行つた後に本転圧を行い、本転圧した第二改良
土に散水して水分の調整を行つて養生するもので
ある。(Means for solving the problem) The construction ground improvement method of the present invention excavates the existing ground over the entire area of the construction site and removes the topsoil with a thickness of approximately 300 to 500 mm. After scattering an appropriate amount of solidification material on the base bottom of the ground, excavate the base bottom to a depth of approximately 300 to 600mm, mix and stir the excavated soil and solidification material, and prepare the first improved soil. The surface of the mixed and stirred first improved soil is leveled and temporarily compacted, and new high-quality soil is laid down to an appropriate thickness on top of this first improved soil. After spreading the solidification material, the solidification material and new soil are mixed and stirred to form a second improved soil.The surface of this second improved soil is leveled and preliminary compacted, and then the surface of the second improved soil is After level adjustment, main compaction is performed, and the main compacted second improved soil is sprinkled with water to adjust the moisture content and cure.
（作用）
一般的に軟弱である表土を建築用地全域にわた
つて取除き、この取除いた地盤のベース底に適量
の固化材を散布して、この固化材とベース底を掘
削した掘削土を混合攪拌して第一改良土となし、
この第一改良土の上に質のよい新たな土砂を敷設
し、この新たな土砂と固化材を混合攪拌して第二
改良土となすことにより建築用地盤の改良を行
う。(Operation) The topsoil, which is generally soft, is removed over the entire area of the construction site, and an appropriate amount of solidification material is sprinkled on the base bottom of the removed ground, and this solidification material and the excavated soil are added to the base bottom. Mix and stir to make the first improved soil.
The ground for construction is improved by laying new soil of good quality on top of this first improved soil, and mixing and stirring this new soil and solidifying material to form second improved soil.
（実施例）
図面は本発明建築用地盤改良工法の実施例を示
したものである。(Example) The drawings show an example of the construction ground improvement method of the present invention.
まず、掘削機１を用いて建築用地全域にわたる
現状地盤２を掘削して約300〜500mmくらいの厚さ
の表土３を取除く。取除く表土３の厚さは表土３
の軟弱性を考慮して200mmでよい場合もあるし、
700mmくらい必要である場合もある。 First, an excavator 1 is used to excavate the existing ground 2 over the entire area of the construction site, and topsoil 3 with a thickness of about 300 to 500 mm is removed. The thickness of the topsoil 3 to be removed is topsoil 3
In some cases, 200mm may be sufficient considering the softness of
In some cases, about 700mm is required.
このように表土３を取除いた地盤のベース底４
に適量の固化材５ａを散布する。固化材５ａとし
て、地盤安定化処理剤やセメント等が単独あるい
は混合して用いられる。地盤安定化処理剤とし
て、例えば、フジベトン（京王科研工業株式会社
の商品名）あるいはアサノクリーンセツト1140
（日本セメント株式会社の商品名）等が好適であ
る。 The base bottom 4 of the ground from which the topsoil 3 has been removed in this way
An appropriate amount of solidifying material 5a is sprinkled on the area. As the solidifying material 5a, a ground stabilizing agent, cement, etc. are used alone or in combination. As a ground stabilization treatment agent, for example, Fujibeton (trade name of Keio Kaken Kogyo Co., Ltd.) or Asano Clean Set 1140
(trade name of Nippon Cement Co., Ltd.) etc. are suitable.
適量の固化材５ａを散布したベース底４を同じ
く掘削機１で約300〜600mmくらいの深さに掘削し
て掘削土６と固化材５ａを混合攪拌することによ
つて第一改良土７ａとする。 The base bottom 4, on which an appropriate amount of solidification material 5a has been sprinkled, is similarly excavated to a depth of about 300 to 600 mm using the excavator 1, and the excavated soil 6 and the solidification material 5a are mixed and stirred to form the first improved soil 7a. do.
このように混合攪拌した第一改良土７ａの表面
を、例えば掘削機１の掘削バケツト１ａ等によつ
て均らすとともに、第一改良土７ａを仮転圧す
る。仮転圧が終了後、第一改良土７ａのレベルを
測定し、レベル差が大きいところ、あるいは混合
むらがあるところなどを作業者によつて修正す
る。必要に応じて仮転圧した第一改良土７ａの上
に水を散布して含水比を調整する。また、必要に
応じてこの散水の前に第一改良土７ａをランマ
８、ローラ９等を用いることによつて本転圧して
おくとよい。 The surface of the thus mixed and stirred first improved soil 7a is leveled using, for example, the excavation bucket 1a of the excavator 1, and the first improved soil 7a is temporarily compacted. After the preliminary compaction is completed, the level of the first improved soil 7a is measured, and the operator corrects areas where the level difference is large or where there is uneven mixing. If necessary, water is sprinkled on the temporarily compacted first improved soil 7a to adjust the water content ratio. Further, if necessary, the first improved soil 7a may be subjected to main compaction using a rammer 8, rollers 9, etc. before this watering.
次に、この第一改良土７ａの上に質のよい新た
な土砂１０を適当な厚さ敷設し、この新たな土砂
１０の上に適量の固化材５ｂを散布した後この固
化材５ｂと新たな土砂１０を混合攪拌することに
より第二改良土７ｂとなす。 Next, a new soil 10 of good quality is laid down to an appropriate thickness on top of this first improved soil 7a, and after scattering an appropriate amount of solidification material 5b on top of this new soil 10, this solidification material 5b and the new soil 10 are spread. By mixing and stirring the earth and sand 10, the second improved soil 7b is obtained.
質のよい新たな土砂１０として、水はけのよい
山砂、川砂、海砂、まさ土等の単体あるいは混合
されたものが好適である。 As the new soil 10 of good quality, it is preferable to use well-drained mountain sand, river sand, sea sand, masa soil, etc. singly or in combination.
このように混合攪拌した第二改良土７ｂの表面
を前記した第一改良土７ａの場合と同じく、例え
ば掘削機１の掘削バケツト１ａ等によつて均らす
とともに、第二改良土７ｂを仮転圧する。 As in the case of the first improved soil 7a, the surface of the second improved soil 7b mixed and stirred in this way is leveled using, for example, the excavation bucket 1a of the excavator 1, and the second improved soil 7b is temporarily Roll pressure.
仮転圧が終了した後、第二改良土７ｂのレベル
を測定し、レベル差が大きいところ、あるいは混
合むらがあるところなどを作業者によつて修正す
る。 After the preliminary compaction is completed, the level of the second improved soil 7b is measured, and the operator corrects areas where the level difference is large or where there is uneven mixing.
さらに第二改良土７ｂをランマ８、ローラ９等
を用いることによつて本転圧を行う。 Further, the second improved soil 7b is subjected to main compaction using a rammer 8, rollers 9, etc.
本転圧終了後に第二改良土７ｂのレベルの再確
認をし、この第二改良土７ｂの上に水を散布して
含水比を調整する。 After the main compaction is completed, the level of the second improved soil 7b is reconfirmed, and water is sprinkled on the second improved soil 7b to adjust the water content ratio.
そして、適当な養生期間をとることにより地盤
の改良は完了する。 After a suitable curing period, the ground improvement is completed.
上記のように改良した地盤上に基礎を構築す
る。 The foundation will be constructed on the ground that has been improved as described above.
なお、第一改良土７ａに用いた固化材５ａと第
二改良土７ｂに用いた固化材５ｂは同じもので
も、別のものでもよい。例えば、固化材５ａとし
て地盤安定化処理剤を用い、固化材５ｂとしてセ
メントを用いてもよい。この逆の使い方であつて
もよい。 The solidifying material 5a used for the first improved soil 7a and the solidifying material 5b used for the second improved soil 7b may be the same or different. For example, a ground stabilizing agent may be used as the solidifying material 5a, and cement may be used as the solidifying material 5b. It may also be used in the opposite way.
（発明の効果）
本発明建築用地盤改良工法は、建築用地全域に
わたる現状地盤の表土を適当な深さで取除いて、
この表土を取除いた地盤を固化材を用いて改良し
て第一改良土となし、さらにこの第一改良土の上
に質のよい新たな土砂を敷設し、この新たな土砂
と固化材を混合攪拌することにより第二改良土と
する。従つて、軟弱な地盤である表土を取除き、
この表土を取除いた地盤と新たな土砂の両方を改
良土としているからさらに改良効果が高まり、安
定した地盤の上に建物を築造することができる。(Effect of the invention) The construction ground improvement method of the present invention removes the topsoil of the existing ground over the entire area of the construction site to an appropriate depth,
The ground from which this topsoil has been removed is improved using a solidification material to become the first improved soil, and new high-quality soil is laid on top of this first improved soil, and this new soil and solidification material are The second improved soil is obtained by mixing and stirring. Therefore, we removed the topsoil, which is the soft ground, and
Since both the ground from which the topsoil has been removed and the new earth and sand are used as improved soil, the improvement effect is further enhanced and buildings can be constructed on stable ground.
図面は本発明建築用地盤改良工法の実施例を示
し、第１図は掘削機を用いて現状地盤を掘削する
断面図、第２図は掘削した地盤のベース底に固化
材を散布した拡大断面図、第３図は第一改良土を
形成する断面図、第４図は第一改良土の上に敷設
した新たな土砂上に固化材を散布した断面図、第
５図は第二改良土の表面を作業者が均らしている
断面図、第６図はランマを用いて第一改良土及び
第二改良土を転圧している断面図、第７図はロー
ラを用いて第一改良土、第二改良土を転圧してい
る断面図である。
１……掘削機、２……現状地盤、３……表土、
４……ベース底、５ａ，５ｂ……固化材、６……
掘削土、１ａ……掘削バケツト、７ａ……第一改
良土、７ｂ……第二改良土、８……ランマ、９…
…ローラ、１０……質のよい新たな土砂。
The drawings show an embodiment of the ground improvement method for construction according to the present invention. Fig. 1 is a cross-sectional view of the current ground being excavated using an excavator, and Fig. 2 is an enlarged cross-section of the excavated ground with solidification material sprinkled on the bottom of the base. Fig. 3 is a cross-sectional view of forming the first improved soil, Fig. 4 is a cross-sectional view of the new soil laid on top of the first improved soil with solidification material spread, and Fig. 5 is a cross-sectional view of the second improved soil. Figure 6 is a cross-sectional view of the first improved soil and second improved soil being compacted using a rammer, and Figure 7 is a cross-sectional view of the first improved soil being leveled by a worker using a roller. , is a cross-sectional view of the second improved soil being compacted. 1...Excavator, 2...Current ground, 3...Top soil,
4... Base bottom, 5a, 5b... Solidifying material, 6...
Excavated soil, 1a... Excavation bucket, 7a... First improved soil, 7b... Second improved soil, 8... Ranma, 9...
...Laura, 10...New soil of good quality.
Claims (1)
300〜500mmくらいの厚さの表土を取除き、このよ
うに表土を取除いた地盤のベース底に適量の固化
材を散布した後、このベース底を約300〜600mmく
らいの深さに掘削して掘削土と固化材を混合攪拌
して第一改良土とし、このように混合攪拌した第
一改良土の表面を均らして仮転圧を行い、この第
一改良土の上に質のよい新たな土砂を適当な厚さ
敷設し、この新たな土砂の上に適量の固化材を散
布した後この固化材と新たな土砂を混合攪拌する
ことにより第二改良土となし、この第二改良土の
表面を均らして仮転圧を行い、次いで第二改良土
表面のレベル調整を行つた後に本転圧を行い、本
転圧した第二改良土に散水して水分の調整を行つ
て養生することを特徴とする建築用地盤改良工
法。1 Excavate the current ground throughout the entire construction site and excavate approximately
After removing the topsoil with a thickness of about 300 to 500 mm and spraying an appropriate amount of solidification material on the base bottom of the ground from which the top soil was removed, excavate the base bottom to a depth of about 300 to 600 mm. The excavated soil and the solidification material are mixed and stirred to obtain the first improved soil, the surface of the mixed and stirred first improved soil is leveled and preliminary compaction is performed, and a high quality soil is poured on top of this first improved soil. After laying new earth and sand to an appropriate thickness and scattering an appropriate amount of solidification material on top of this new earth and sand, this solidification material and new earth and sand are mixed and stirred to obtain second improved soil. The surface of the soil is leveled and preliminary compaction is performed, then the level of the surface of the second improved soil is adjusted, and then the main compaction is performed, and the moisture content is adjusted by sprinkling water on the second improved soil that has been completely compacted. A construction ground improvement method characterized by curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28571986A JPS63138016A (en) | 1986-11-29 | 1986-11-29 | Improving construction for construction site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28571986A JPS63138016A (en) | 1986-11-29 | 1986-11-29 | Improving construction for construction site |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63138016A JPS63138016A (en) | 1988-06-10 |
| JPH0473484B2 true JPH0473484B2 (en) | 1992-11-20 |
Family
ID=17695139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28571986A Granted JPS63138016A (en) | 1986-11-29 | 1986-11-29 | Improving construction for construction site |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63138016A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04330112A (en) * | 1991-04-30 | 1992-11-18 | O S Koei Kk | Constructing method for concrete strip footing |
-
1986
- 1986-11-29 JP JP28571986A patent/JPS63138016A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63138016A (en) | 1988-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |