JPH0473483B2 - - Google Patents
Info
- Publication number
- JPH0473483B2 JPH0473483B2 JP28571886A JP28571886A JPH0473483B2 JP H0473483 B2 JPH0473483 B2 JP H0473483B2 JP 28571886 A JP28571886 A JP 28571886A JP 28571886 A JP28571886 A JP 28571886A JP H0473483 B2 JPH0473483 B2 JP H0473483B2
- Authority
- JP
- Japan
- Prior art keywords
- soil
- ground
- improved soil
- new
- topsoil
- 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 41
- 238000010276 construction Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000005056 compaction Methods 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 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000718541 Tetragastris balsamifera Species 0.000 description 1
- 239000004568 cement 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
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建造する場合、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）
ベタ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、この新たな土砂上に適量の固化材を
散布した後、この新たな土砂と固化材を混合攪拌
することにより改良土となし、改良土の表面を均
らして仮転圧を行い、次いで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. New soil of good quality is laid down at an appropriate thickness on the base of the soil that has been soiled, and an appropriate amount of solidification material is sprinkled on top of this new soil, and the new soil and solidification material are mixed and stirred to improve the soil. After leveling the surface of the improved soil and performing preliminary compaction, the level of the improved soil surface is adjusted, then main compaction is performed, and water is sprinkled on the compacted improved soil to adjust the moisture content. It is something to be nourished and nurtured.
（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上に質
のよい新たな土砂を敷設するとともにこの新たな
土砂上に適量の固化材を散布して、この固化材と
新たな土砂を混合攪拌して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 new soil of good quality is laid on the base bottom of this removed ground, and an appropriate amount of solidification material is placed on top of this new soil. The ground for construction is improved by spreading the solidified material and stirring the new soil to make 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200mmでよい場合もあるし、700
mm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 the
In some cases, about mm is necessary.
このように表土３を取除いた地盤のベース底４
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５を
散布する。固化材５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
New earth and sand 10 of good quality is laid on top with an appropriate thickness, and an appropriate amount of solidification material 5 is sprinkled on top of this new earth and sand 10. As the solidifying material 5, a ground stabilizing agent, cement, etc. may be used alone or in combination.
As the ground stabilizing agent, for example, Fujibeton (trade name of Keio Kaken Kogyo Co., Ltd.) or Asano Clean Set 1140 (trade name of Nippon Cement Co., Ltd.) is suitable.
また、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。 Further, 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.
適量の固化材５を散布した新たな土砂１０を同
じく掘削機１で混合攪拌することによつて改良土
７とする（第３図参照）。 Improved soil 7 is obtained by mixing and stirring new soil 10 with an appropriate amount of solidification material 5 sprinkled thereon using the same excavator 1 (see FIG. 3).
このように混合攪拌した改良土７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、改良土７を仮転圧する。 The surface of the improved soil 7 mixed and stirred in this manner is leveled using, for example, the excavation bucket 1a of the excavator 1, and the improved soil 7 is temporarily compacted.
仮転圧が終了後、改良土７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, measure the level of the improved soil 7,
The operator corrects areas where there is a large level difference or uneven mixing.
さらに改良土７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 improved soil 7 is subjected to main compaction using a rammer 8, rollers 9, etc.
本転圧終了後に改良土７のレベルの再確認を
し、この改良土７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 improved soil 7 is reconfirmed, and water is sprinkled on the improved soil 7 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.
（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
ることにより改良土とする。従つて、軟弱な地盤
である表土を取除いて質のよい新たな土砂を敷設
しているから改良効果が高まり、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,
New soil of good quality is laid on the ground from which this topsoil has been removed, and the new soil and solidification material are mixed and stirred to create improved soil. Therefore, since the topsoil, which is a soft ground, is removed and new soil of good quality is laid, the improvement effect is enhanced and the building 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図はベース底上に敷設した新たな土
砂上に固化材を散布した拡大断面図、第３図は固
化材を散布したベース底を適当な深さ掘削しつつ
混合攪拌して改良土を形成する断面図、第４図は
改良土の表面を作業者が均らしている断面図、第
５図はランマを用いて改良土を転圧している断面
図、第６図はローラを用いて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、５……固化材、７……改良土、
１ａ……掘削バケツト、８……ランマ、９……ロ
ーラ、１０……質のよい新たな土砂。
The drawings show an example of the ground improvement method for construction according to the present invention, and Fig. 1 is a cross-sectional view of the current ground being excavated using an excavator, and Fig. 2 is a cross-sectional view of the new earth and sand laid on the base bottom. Figure 3 is an enlarged cross-sectional view of the sprayed soil; Figure 3 is a cross-sectional view of the bottom of the base on which the solidification material has been sprinkled, which is excavated to an appropriate depth while being mixed and stirred to form improved soil; Figure 4 is a cross-sectional view of the surface of the improved soil being leveled by a worker. FIG. 5 is a cross-sectional view showing improved soil being rolled using a rammer, and FIG. 6 is a cross-sectional view showing improved soil being compacted using rollers. 1...Excavator, 2...Current ground, 3...Top soil,
4... Base bottom, 5... Solidification material, 7... Improved soil,
1a... excavation bucket, 8... ranma, 9... roller, 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
上に適量の固化材を散布した後、この新たな土砂
と固化材を混合攪拌することにより改良土とな
し、改良土の表面を均らして仮転圧を行い、次い
で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
Remove the topsoil with a thickness of about 300 to 500 mm, lay a suitable thickness of new high-quality soil on the base of the ground from which the topsoil has been removed, and solidify an appropriate amount on top of this new soil. After spreading the material, the new soil and solidification material are mixed and stirred to create improved soil, the surface of the improved soil is leveled and preliminary compaction is carried out, and the level of the improved soil surface is adjusted before the main work is carried out. A construction ground improvement method characterized by performing compaction and curing the compacted improved soil by sprinkling water to adjust the moisture content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28571886A JPS63138015A (en) | 1986-11-29 | 1986-11-29 | Improving construction for construction site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28571886A JPS63138015A (en) | 1986-11-29 | 1986-11-29 | Improving construction for construction site |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63138015A JPS63138015A (en) | 1988-06-10 |
| JPH0473483B2 true JPH0473483B2 (en) | 1992-11-20 |
Family
ID=17695127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28571886A Granted JPS63138015A (en) | 1986-11-29 | 1986-11-29 | Improving construction for construction site |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63138015A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2549345B2 (en) * | 1993-07-21 | 1996-10-30 | 株式会社ヨウタ | Swelling ground improvement method |
| JP6420734B2 (en) * | 2015-07-24 | 2018-11-07 | 大成ロテック株式会社 | Road auxiliary equipment construction method and moving direction instruction program |
-
1986
- 1986-11-29 JP JP28571886A patent/JPS63138015A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63138015A (en) | 1988-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |