JPS63114717A - Ground improving work to cope with unequal subsidence - Google Patents
Ground improving work to cope with unequal subsidenceInfo
- Publication number
- JPS63114717A JPS63114717A JP25792986A JP25792986A JPS63114717A JP S63114717 A JPS63114717 A JP S63114717A JP 25792986 A JP25792986 A JP 25792986A JP 25792986 A JP25792986 A JP 25792986A JP S63114717 A JPS63114717 A JP S63114717A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- amount
- predicted
- unequal subsidence
- distribution
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007796 conventional method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000004576 sand Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【発明の詳細な説明】
（発明が属する技術分野）
本発明は軟弱地盤上に直接基礎の建物を構築する場合の
地盤改良工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to a ground improvement method for constructing a building with a foundation directly on soft ground.
（発明の課顕とその特徴点）
軟弱地盤上に直接基礎の建物を構築する場合は、増加荷
重（建物荷重＋地盤の未圧密荷重）によシ沈下が発生す
るので、建物の基礎梁は荷重が作用した状態で不同沈下
が発生しても応力的に討え得る剛性を具えている必要が
ある。(Problems of the invention and its features) When building a building with a foundation directly on soft ground, settlement will occur due to the increased load (building load + unconsolidated load of the ground), so the foundation beam of the building It must have enough rigidity to withstand stress even if uneven settlement occurs under load.
一般に、予測される不同沈下量が大きいほど基礎梁の所
要剛性は大きくなるが、地盤の軟弱層の層厚が大きい、
圧縮性が大きい、建物荷重が大きいこと等が原因で、過
大な不同沈下量が予測される場合には、基礎梁の所要剛
性が非常に大きくなり、構造計画上や経済上、不都合を
生ずることになる。Generally, the greater the predicted uneven settlement, the greater the required stiffness of the foundation beam, but if the thickness of the soft layer of the ground is large,
If an excessive amount of uneven settlement is predicted due to high compressibility or a large building load, the required stiffness of the foundation beam will become extremely large, causing problems in terms of structural planning and economics. become.
このような場合、従来は、地盤全域を一様に改良して地
盤強度を高めることによって、増加荷重による総沈下量
を小さくシ、結果として不同沈下量が小さくなるように
していた。In such cases, conventionally, the entire area of the ground was improved uniformly to increase the ground strength, thereby reducing the total amount of settlement due to the increased load and, as a result, reducing the amount of uneven settlement.
本発明は、前述の一様改良の従来法と比較して、地盤改
良の数量が低減され、かつ、基礎梁の所要剛性も小さく
なる、経済的な地盤改良工法を提供することを目的とし
ているものであって、その構成上の特徴は特許請求の範
囲に記載したとおりである。The present invention aims to provide an economical ground improvement method that reduces the amount of ground improvement and the required rigidity of the foundation beam compared to the conventional method of uniform improvement described above. The structural features are as described in the claims.
本発明でいう「改良仕様」は、改良強度、改良深度等で
示される改良の度合であって、改良手段とは関係がない
。したがって、本発明を実施する場合の地盤改良の手段
はサンドドレーン工法、サンドコンパクションパイル工
法、深層混合処理工法等の何れであっても、またこれら
の併用であってもよい。The "improved specification" as used in the present invention refers to the degree of improvement indicated by improved strength, improved depth, etc., and has nothing to do with the improvement means. Therefore, when carrying out the present invention, the soil improvement method may be any of the sand drain method, sand compaction pile method, deep mixing method, etc., or a combination of these methods.
（図面による説明）
図面は本発明工法を従来法と比較して説明するための模
式図である。(Explanation using drawings) The drawings are schematic diagrams for explaining the construction method of the present invention in comparison with the conventional method.
軟弱地盤上に直接基礎の建物１を構築する場合、従来は
、第５図に示すように建物１が載る地盤全域を一様に改
良して地盤強度を高め、増加荷重による総沈下量Ｓを第
４図（イ）に示すように無改良の場合の工から改良後の
■のように小さくシ、その結果として基礎梁２の不同沈
下量△Ｓが第４図（ロ）に示すようをて小さくなるよう
にしていた。When constructing a building 1 with a foundation directly on soft ground, conventionally, as shown in Figure 5, the entire area of the ground on which the building 1 rests is uniformly improved to increase the ground strength, and the total settlement S due to the increased load is reduced. As shown in Figure 4 (a), the construction without improvement becomes smaller as shown in ■ after the improvement, and as a result, the uneven settlement amount △S of the foundation beam 2 decreases as shown in Figure 4 (b). I tried to make it smaller.
これに対して、本発明では、増加荷重による不同沈下量
の分布を予測し、これが第４図（ロ）に示すような分布
であるとき、予測不同沈下量が大きい中央部においては
高レベルの改良仕様（大きい改良強度、改良深度、等）
を、また予測不同沈下量が小さい周辺部においては低レ
ベルの改良仕様（小さい改良強度、改良深度、等）を、
それぞれ設定し、そのとおりに地盤を改良して（第１図
参照）、建物１０基礎梁に有利な不同沈下分布になるよ
うにして尋る。なお、第１図（イ）は改良強度を変えた
場合、第１図（ロ）は改良深度を変えた場合をそれぞれ
示している。In contrast, in the present invention, the distribution of the amount of uneven settlement due to increased load is predicted, and when the distribution is as shown in Figure 4 (b), a high level of uneven settlement is expected in the central area where the predicted amount of uneven settlement is large. Improved specifications (greater improved strength, improved depth, etc.)
In addition, low-level improvement specifications (small improvement strength, improvement depth, etc.) are applied in surrounding areas where the amount of unpredictable settlement is small.
Set each and improve the ground accordingly (see Figure 1) to obtain an uneven settlement distribution that is advantageous for the building 10 foundation beams. Note that FIG. 1(A) shows the case where the improvement intensity is changed, and FIG. 1(B) shows the case where the improvement depth is changed.
これを第２図によυ説明すると、第２図（イ）において
、■は地盤全域を一様に高レベルの改良仕様（前述の従
来法と同じ改良仕様）で改良した場合の総沈下量Ｓを、
また■は地盤全域を一様に低レベルの改良仕様で改良し
た場合の総沈下量Ｓを、それぞれ示しており、■と■の
実線部分が本発明による場合の総沈下量Ｓの分布である
。すなわち、本発明による場合は、従来法の場合と比べ
て周辺部の総沈下量が大きくなり、その結果、基礎梁２
の不同沈下量△Ｓの分布が第２図（ロ）に示すようにな
って、中央部の不同沈下量△Ｓが従来法の場合より大巾
て小さくなる。To explain this using Figure 2, in Figure 2 (A), ■ is the total amount of settlement when the entire ground area is uniformly improved with high-level improvement specifications (the same improvement specifications as the conventional method described above). S,
In addition, ■ indicates the total amount of settlement S when the entire ground area is uniformly improved with low-level improvement specifications, and the solid line portion between ■ and ■ is the distribution of the total amount of settlement S when the present invention is applied. . In other words, in the case of the present invention, the total amount of settlement in the peripheral area is larger than in the case of the conventional method, and as a result, the foundation beam 2
The distribution of the uneven settlement amount ΔS is as shown in FIG. 2 (b), and the uneven settlement amount ΔS in the central part is much smaller than that in the conventional method.
（発明の効果）
本発明は以上のようなものであって、予測不同沈下量が
大きい部分には高レベルの改良仕様を、予測不同沈下量
が小さい部分には低レベルの改良仕様を、というように
、予測不同沈下量の分布に応じた改良仕様を設定して、
不同沈下量を基礎梁に有利になるように直接的にコント
ロールするものであるから、−様に高レベルの改良仕様
の場合と比較して、地盤改良が数量的に低減されるのみ
ならず、基礎梁の所要剛性が小さくて済むこと（（なり
、これら両面から大きな経済的効果が期待できる。(Effects of the Invention) The present invention is as described above, and provides high-level improved specifications for areas where the amount of predicted uneven settlement is large, and low-level improved specifications for areas where the predicted uneven amount of settlement is small. By setting improved specifications according to the distribution of the predicted uneven settlement amount,
Since it directly controls the amount of uneven settlement to the advantage of the foundation beam, compared to the case of high-level improvement specifications such as -, the ground improvement is not only reduced quantitatively, but also The required stiffness of the foundation beam can be reduced ((), and large economic effects can be expected from both of these aspects.
図面は本発明工法を従来法と比較して説明するための模
式図であって、第１図は本発明工法の地盤改良状態図、
第２図は同じく総沈下量と不同沈下量の分布図、第６図
は従来法の地盤改良状態図、第４図は同じく総沈下量と
不同沈下量の分布図である。
１・・・建物、２・・・基礎梁、・・・・・・ 。
第１図 第３図
第２図 第４因The drawings are schematic diagrams for explaining the construction method of the present invention in comparison with the conventional method, and FIG. 1 is a diagram of the ground improvement state of the construction method of the present invention;
Figure 2 is a distribution map of total settlement and uneven settlement, Figure 6 is a diagram of the state of ground improvement using the conventional method, and Figure 4 is a distribution diagram of total settlement and uneven settlement. 1...Building, 2...Foundation beam,... Figure 1 Figure 3 Figure 2 Factor 4
Claims (1)
増加荷重による不同沈下量の分布を予測し、不同沈下量
の大きい部分には高レベルの改良仕様を、不同沈下量の
小さい部分には低レベルの改良仕様を、それぞれ設定し
て、基礎梁に有利な不同沈下分布になるように地盤を改
良することを特徴とする不同沈下量に対応した地盤改良
工法。When constructing a building with a foundation directly on soft ground,
The distribution of uneven settlement due to increased load is predicted, and high-level improvement specifications are set for areas with large uneven settlements, and low-level improvement specifications are set for areas with small uneven settlements. A ground improvement method that deals with uneven settlement, which is characterized by improving the ground so that it has an advantageous uneven settlement distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25792986A JPS63114717A (en) | 1986-10-29 | 1986-10-29 | Ground improving work to cope with unequal subsidence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25792986A JPS63114717A (en) | 1986-10-29 | 1986-10-29 | Ground improving work to cope with unequal subsidence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63114717A true JPS63114717A (en) | 1988-05-19 |
| JPH0568569B2 JPH0568569B2 (en) | 1993-09-29 |
Family
ID=17313156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25792986A Granted JPS63114717A (en) | 1986-10-29 | 1986-10-29 | Ground improving work to cope with unequal subsidence |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63114717A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003020659A (en) * | 2001-07-04 | 2003-01-24 | Shimizu Corp | Base isolation structure using soft ground |
| JP2007223353A (en) * | 2006-02-21 | 2007-09-06 | Honda Motor Co Ltd | Door part structure of vehicle |
| JP2009062794A (en) * | 2007-09-10 | 2009-03-26 | Penta Ocean Construction Co Ltd | Improved ground and soil improving method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170147A (en) * | 1996-12-09 | 1998-06-26 | Shingo Kaminaga | Dryer for golf club grip in golf cart |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51107608A (en) * | 1975-03-17 | 1976-09-24 | Takenaka Komuten Co | CHICHUNOORYOKUBUNPUCHOSETSUHOHO |
| JPS51146706A (en) * | 1975-06-11 | 1976-12-16 | Seiwa Kenchiku Setsukei Jimush | Method of preventing sinking of floor |
| JPS5894513A (en) * | 1981-12-01 | 1983-06-04 | Nakatomi Kurimoto | Constructing device for sand pile |
-
1986
- 1986-10-29 JP JP25792986A patent/JPS63114717A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51107608A (en) * | 1975-03-17 | 1976-09-24 | Takenaka Komuten Co | CHICHUNOORYOKUBUNPUCHOSETSUHOHO |
| JPS51146706A (en) * | 1975-06-11 | 1976-12-16 | Seiwa Kenchiku Setsukei Jimush | Method of preventing sinking of floor |
| JPS5894513A (en) * | 1981-12-01 | 1983-06-04 | Nakatomi Kurimoto | Constructing device for sand pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003020659A (en) * | 2001-07-04 | 2003-01-24 | Shimizu Corp | Base isolation structure using soft ground |
| JP2007223353A (en) * | 2006-02-21 | 2007-09-06 | Honda Motor Co Ltd | Door part structure of vehicle |
| JP2009062794A (en) * | 2007-09-10 | 2009-03-26 | Penta Ocean Construction Co Ltd | Improved ground and soil improving method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0568569B2 (en) | 1993-09-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |