JPS60230423A - Ground improving method - Google Patents
Ground improving methodInfo
- Publication number
- JPS60230423A JPS60230423A JP8684484A JP8684484A JPS60230423A JP S60230423 A JPS60230423 A JP S60230423A JP 8684484 A JP8684484 A JP 8684484A JP 8684484 A JP8684484 A JP 8684484A JP S60230423 A JPS60230423 A JP S60230423A
- Authority
- JP
- Japan
- Prior art keywords
- poured
- hole
- bored
- soil
- foundation
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、膨張性セメントを利用した施工容易かつ安価
な地盤改良方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an easy and inexpensive ground improvement method using expandable cement.
軟質地盤の改良方法として、杭等を打設し、又はバイブ
ロフローテーション工法、サンドドレーン工法などが用
いられているが、これらの工法の施工には大がかりな装
置が必要となり、家屋などの小建築物の地盤改良のため
には設備が過大かつ高価にすぎる。As a method for improving soft ground, driving piles, etc., vibroflotation method, sand drain method, etc. are used, but these methods require large-scale equipment and are difficult to install for small buildings such as houses. Equipment is too large and expensive for ground improvement.
本発明は、地表に設ける穿孔内に膨張性セメントを注入
することによって、軟弱地盤の圧密を促進し、特に家屋
など比較的小型の建築物の地盤における、その表層土質
の安定のために好適に利用しうる地盤改良方法の提供を
目的としている。The present invention promotes the consolidation of soft ground by injecting expandable cement into a hole provided in the ground surface, and is particularly suitable for stabilizing the surface soil of the ground of relatively small buildings such as houses. The purpose is to provide usable ground improvement methods.
□〔発明の開示〕 以下本発明の一実施例を図面に基ブき説明する。□ [Disclosure of invention] An embodiment of the present invention will be described below with reference to the drawings.
図において、地−改良方法は、基礎２の下面を越える深
さの穿孔３・−を並設するとともに、該穿孔３に、膨張
性セメント４を注入しかつその注入、部５上方の空孔部
６に土Δを埋め戻す。In the figure, the soil improvement method is to construct perforations 3-- with a depth exceeding the lower surface of the foundation 2 in parallel, and to inject expandable cement 4 into the perforations 3, and then to form a hole above part 5. Backfill part 6 with soil Δ.
前記穿孔３は、５〜３．０ＣＩ１１、好ましくは１０〜
２０ｃｍの口径を有し、又その深さは家屋の基礎２の下
面、従って基礎２の根切り深さ１１からさらに１０〜３
００ｃｓａ、通常５０〜１００ｃＩＩｌ程度下方にのび
る深さを有するごとく、各種のオーガを用いてかつ穿孔
３間で小間隙りを隔てるごとく並設される。The perforation 3 has a CI of 5 to 3.0 CI11, preferably 10 to
It has a diameter of 20 cm, and its depth is the lower surface of the foundation 2 of the house, so from the root cut depth 11 of the foundation 2, it is further 10 to 3
00 csa, usually extending downward to a depth of about 50 to 100 cIIl, using various augers, and are arranged in parallel with a small gap between the holes 3.
前記膨張性セメント４は、小野田セメント株式会社の製
造にかかる商品名「小野田エクスパン」、吉澤石灰工業
株式会社が取扱う商品名「スプリッタ」等、膨張性能の
大きい酸化カルシウムを成分とする石灰系かつ乾燥収縮
によるひび割れ防止、高強度コンクリート製品の製作又
は建築物破砕用等のために使用する膨張剤とセメント、
コンクリートとの混和物であって、固化に際して比較的
大きな膨張率を有するものを使用する。The expandable cement 4 is a dry lime-based cement containing calcium oxide with high expansion performance, such as "Onoda Expan" manufactured by Onoda Cement Co., Ltd. and "Splitter" manufactured by Yoshizawa Lime Industry Co., Ltd. Expanding agents and cement used for preventing cracks due to shrinkage, manufacturing high-strength concrete products, and crushing buildings, etc.
A mixture with concrete that has a relatively large expansion coefficient upon solidification is used.
該膨張性セメント４は、前記穿孔３内に、適宜の打設装
置を用いて注入し、その注入部５の上端が、根切り深さ
１■程度となるように打設される。The expandable cement 4 is injected into the perforation 3 using a suitable casting device, and is cast so that the upper end of the injection part 5 has a root cutting depth of about 1 inch.
又注入部５を形成した後、該注入部５上方の穿孔２の空
孔部６を穿孔した土Ａを用いて埋め戻しかつ締め固めた
のち養生させる。After forming the injection part 5, the hole 6 of the perforation 2 above the injection part 5 is backfilled with the soil A, compacted, and then cured.
膨張性セメント４は、その養生の間、例えば樽状に膨張
し、注入部５−間の土Ｂを圧密させ一体化するとともに
注入部５が杭状体として機能することにより、その地盤
耐力を向上する。又膨張性セメント４は周囲の土に浸透
することにより、周囲の土をも固化し強固な地盤を形成
する。なお養生ののち、堀起こし、基礎２を形成する。During its curing, the expandable cement 4 expands into, for example, a barrel shape, and consolidates and integrates the soil B between the injection part 5 and the injection part 5, which functions as a pile-shaped body, thereby increasing the soil bearing capacity. improves. In addition, the expandable cement 4 permeates into the surrounding soil, thereby solidifying the surrounding soil and forming a strong foundation. After curing, the trench will be raised and the foundation 2 will be formed.
なお本発明の地盤改良方法において、前記穿孔３を、建
物により覆われる全ての地盤に亘って開穿したうえ膨張
性セメント４を注入することによって、各注入部５が集
客して群杭作用を発揮でき、いわゆるベタ基礎状の改良
地盤を形成できる。In the ground improvement method of the present invention, by drilling the holes 3 over all the ground covered by the building and injecting the expandable cement 4, each injection part 5 attracts customers and performs a group pile action. It is possible to form improved ground in the form of a so-called solid foundation.
又形成される基礎２の下面に沿・う地盤のみを強化する
こともできる。It is also possible to strengthen only the ground along the lower surface of the foundation 2 to be formed.
さらに透孔３の口径、深さは建物の重置と土質に応じて
定められ、又穿孔３間の距１ｉ１ｔＬは、膨張性セメン
ト４の膨張力によって、注入部５．５間の土Ｂがやや圧
密される程度に設定する。また好ましくは強固な圧密力
をうる小長さに設定する。Furthermore, the diameter and depth of the through holes 3 are determined depending on the building placement and soil quality, and the distance 1i1tL between the perforations 3 is determined by the expansion force of the expandable cement 4, so that the soil B between the injection parts 5.5 Set it so that it is slightly compressed. Preferably, the length is set to be small enough to provide strong compaction force.
なお施工に際しては、穿孔、膨張性セメント４の注入を
一連にしかも複数個同時に処理しえる適宜の装置を用い
てもよく、ざらに土の埋め戻しをも該装置を用いて行う
ことにより、さらに施工性を高めうる。In addition, during construction, an appropriate device may be used that can perform drilling and injection of expandable cement 4 in a series or at the same time. It can improve workability.
畝上のごとく本発明の地盤改良方法は、穿孔、膨張性セ
メントの注入、土の埋め戻しによって基礎を支持する１
ｌｌｌｌｌｌを改良でき、施工が容易であり地盤改良の
ためのコストを低減するとともに、土の粘着とその深さ
に応じて最適な施工をなしうるなど多くの効果を奏し・
５る。The ground improvement method of the present invention, like a ridge, supports the foundation by drilling, injecting expandable cement, and backfilling the soil.
It has many effects, such as being able to improve lllllll, being easy to construct, reducing the cost of ground improvement, and being able to perform optimal construction depending on the adhesion of the soil and its depth.
5 Ru.
第１図は穿孔に膨張性セメントを注入した状態を示す断
面図、第２図は空孔部に土を埋め戻した状態を示す断面
図、第３図は施工完了後の状態を示す断面図である。
２−基礎、 ３−穿孔、 ４・−膨張性セメント、５−
注入部、 ６−・空孔部。
特許出願人 ナショナル住宅産業株式会社代理人 弁理
士 苗 村 正
第１図
第３図
第２図Figure 1 is a sectional view showing the state in which expandable cement has been injected into the hole, Figure 2 is a sectional view showing the state in which the hole is backfilled with soil, and Figure 3 is a sectional view showing the state after construction is completed. It is. 2-foundation, 3-perforation, 4-expandable cement, 5-
Injection part, 6--hole part. Patent applicant National Housing Industry Co., Ltd. Agent Patent attorney Tadashi Naemura Figure 1 Figure 3 Figure 2
Claims (1)
に、該穿孔に、基礎下面程度の高さとなる迄膨張性セメ
ントを注入した上、注入部上方の空孔部を埋め戻すこと
を特徴とする地盤改良方法。(1) A feature of this method is to create parallel holes with a depth that exceeds the bottom surface of the foundation, inject expandable cement into the holes until the height reaches the same level as the bottom surface of the foundation, and then backfill the hole above the injection point. Ground improvement method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8684484A JPS60230423A (en) | 1984-04-27 | 1984-04-27 | Ground improving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8684484A JPS60230423A (en) | 1984-04-27 | 1984-04-27 | Ground improving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60230423A true JPS60230423A (en) | 1985-11-15 |
Family
ID=13898116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8684484A Pending JPS60230423A (en) | 1984-04-27 | 1984-04-27 | Ground improving method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60230423A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6363816A (en) * | 1986-09-03 | 1988-03-22 | Sekisui House Ltd | Improving work of surface soil of ground for building |
| CN114016498A (en) * | 2021-11-15 | 2022-02-08 | 中国建筑第四工程局有限公司 | Construction method for preventing hole string of overlength hollow cast-in-place pile in sea-filling area |
-
1984
- 1984-04-27 JP JP8684484A patent/JPS60230423A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6363816A (en) * | 1986-09-03 | 1988-03-22 | Sekisui House Ltd | Improving work of surface soil of ground for building |
| CN114016498A (en) * | 2021-11-15 | 2022-02-08 | 中国建筑第四工程局有限公司 | Construction method for preventing hole string of overlength hollow cast-in-place pile in sea-filling area |
| CN114016498B (en) * | 2021-11-15 | 2023-11-03 | 中国建筑第四工程局有限公司 | Construction method for preventing filling pile from being in series holes in ultra-long hollow holes in sea-filling area |
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