JPH0730545B2 - Ground improvement method - Google Patents
Ground improvement methodInfo
- Publication number
- JPH0730545B2 JPH0730545B2 JP31809287A JP31809287A JPH0730545B2 JP H0730545 B2 JPH0730545 B2 JP H0730545B2 JP 31809287 A JP31809287 A JP 31809287A JP 31809287 A JP31809287 A JP 31809287A JP H0730545 B2 JPH0730545 B2 JP H0730545B2
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- ground
- concrete
- cement
- mixed 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
- 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） この発明は、地盤改良工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ground improvement method.
（従来の技術） 一般に、粘性土地盤等といった軟弱な地盤に建物を立て
る場合には、地盤強度の増大，沈下の抑制ならびに止水
等を図る目的で、地盤改良をおこなう場合が多い。(Prior Art) Generally, when a building is built on soft ground such as cohesive ground, ground improvement is often performed for the purpose of increasing ground strength, suppressing subsidence, and stopping water.
この種の地盤改良には、従来より様々な方法が実施され
ているが、その一方法として、支持地盤の上にいわゆる
ラップルコンクリートを一定厚さに打設する方法があ
る。Various methods have been conventionally used for this type of ground improvement, and one of them is a method of placing so-called laple concrete on a supporting ground to a constant thickness.
（発明が解決しようとする問題点） しかしながら、ラップルコンクリートは、一般にコンク
リートプラントで製造され、地盤改良現場まで運搬され
て打設されるものであるため、地盤改良現場がコンクリ
ートプラントより遠くなるにしたがってコンクリートの
輸送距離が伸びその結果として、コンクリートの品質低
下や輸送費が嵩むことが免れない。(Problems to be Solved by the Invention) However, since wrinkle concrete is generally manufactured in a concrete plant, transported to the ground improvement site, and placed, the ground improvement site becomes farther from the concrete plant. The transport distance of concrete is extended, and as a result, the quality of concrete is deteriorated and the transportation cost is increased.
この発明は、このような前記従来の問題点を解消するた
めに提案されたもので、コンクリートの品質低下の恐れ
が全くなくきわめて経済的な施工が可能な地盤改良工法
を提供することを目的とする。The present invention was proposed in order to solve the above-mentioned conventional problems, and an object thereof is to provide a ground improvement method capable of extremely economical construction without any fear of quality deterioration of concrete. To do.
（問題点を解決するための手段） この発明は、軟弱地盤の地盤改良工法に関するもので、
軟弱地盤を支持地盤面まで掘削し、続いて、当該支持地
盤面の上に貧調合コンクリート用骨材を一定厚さに敷き
詰め、この貧調合コンクリート用骨材の上にセメントを
一定厚さに敷き詰め、続いて、貧調合コンクリート用骨
材とセメントとをから練りし、続いて貧調合コンクリー
ト用骨材およびセメントを散水しながら転圧することを
特徴とする。(Means for Solving Problems) The present invention relates to a ground improvement method for soft ground,
Excavate the soft ground to the supporting ground surface, and then spread the aggregate for poorly mixed concrete to a certain thickness on the supporting ground surface, and spread the cement to a certain thickness on the aggregate for poorly mixed concrete. Next, the aggregate for poorly mixed concrete and cement are kneaded from the mixture, and then the aggregate and cement for poorly mixed concrete are water-compacted and compacted.
（実施例） 以下、この発明に係る施工方法を図示する一実施例に基
づいて順を追って説明する。(Example) Hereinafter, a construction method according to the present invention will be described in order based on an illustrated example.
まず、軟弱地盤１を支持地盤面２まで一定範囲にわ
たって掘り下げ、軟弱土を搬出する（第１図参照）。支
持地盤面２は、平坦にならす。First, the soft ground 1 is dug down to a support ground surface 2 over a certain range, and the soft soil is carried out (see FIG. 1). The support ground surface 2 is leveled.
なお、軟弱地盤１を掘削するには、従来の掘削工法およ
び建設機械を使用するものとする。In addition, in order to excavate the soft ground 1, the conventional excavation method and construction machine shall be used.
続いて、支持地盤面２の上に砕石等の貧調合コンク
リート用骨材３を全体にわたって所定の厚さに敷き詰
め、その上を平坦に均す（第２図参照）。Next, the aggregate 3 for poorly mixed concrete such as crushed stone is spread over the entire support ground surface 2 to a predetermined thickness, and the top surface is flattened (see FIG. 2).
続いて、敷き詰めた貧調合コンクリート用骨材３の
上にポルトランドセメント等のセメント４を所定の厚さ
に敷き詰める（第３図参照）。Subsequently, cement 4 such as Portland cement is spread to a predetermined thickness on the spread poor aggregate concrete aggregate 3 (see FIG. 3).
続いて、貧調合コンクリート用骨材３とセメント４
を充分にから練りをし、かつ平坦に敷きならす（第４図
参照）。Next, poor mix concrete aggregate 3 and cement 4
Knead thoroughly and spread evenly (see Fig. 4).
続いて、貧調合コンクリート用骨材３とセメント４
とをから練りすることにより製造された混合層５の上を
散水しながら、ローラによって充分に転圧する（第５図
参照）。Next, poor mix concrete aggregate 3 and cement 4
While being sprinkled with water on the mixed layer 5 produced by kneading the ingredients (1) and (2), the rollers are sufficiently rolled (see FIG. 5).
以下、〜の作業を数回繰り返すことによって、支持
地盤２の上に必要な厚さの貧調合コンクリートの層を造
成することができる。Hereinafter, by repeating the operations of to several times, a layer of poorly mixed concrete having a required thickness can be formed on the support ground 2.
層を厚くしたい場合には、〜の作業回数を多くす
る。If you want to make the layer thicker, increase the number of operations of.
尚、１層の厚さとしては混合を均一にするのと攪拌機
械，転圧用タイヤローラの能力からみて40cm〜50cmが最
適である。Incidentally, the thickness of one layer is optimally 40 cm to 50 cm from the viewpoint of uniform mixing and the ability of the stirring machine and the tire roller for compaction.
（発明の効果） この発明は、以上の構成からなるので、以下の効果を有
する。(Effects of the Invention) Since the present invention is configured as described above, it has the following effects.
コンクリートの輸送がないので、コンクリートの品
質低下を防止することができ、かつ輸送費が節約でき工
事費の大幅低減化が図れる。Since concrete is not transported, it is possible to prevent the quality of concrete from deteriorating, save transportation costs, and significantly reduce construction costs.
また、充分にから練りした貧調合コンクリート用骨
材とセメントとを散水しながらローラによって転圧する
ため地盤の支持強度も充分大きくすることができる。In addition, since the aggregate and the cement for poorly mixed concrete, which have been sufficiently kneaded, are compacted by the rollers while being sprinkled, the supporting strength of the ground can be sufficiently increased.
第１図〜第５図は、この発明の地盤改良工法の施工順序
を示す断面図、第６図は、改良地盤の断面図である。 １……軟弱地盤、２……支持地盤面、３……貧調合コン
クリート用骨材、４……セメント、５……混合層。1 to 5 are sectional views showing the construction sequence of the ground improvement method of the present invention, and FIG. 6 is a sectional view of the improved ground. 1 ... Soft ground, 2 ... Support ground surface, 3 ... Aggregate for poorly mixed concrete, 4 ... Cement, 5 ... Mixed layer.
Claims (1)
て、当該支持地盤面の上に貧調合コンクリート用骨材を
一定厚さに敷き詰め、この貧調合コンクリート用骨材の
上にセメントを一定厚さに敷き詰め、続いて、貧調合コ
ンクリート用骨材とセメントとをから練りし、続いて貧
調合コンクリート用骨材およびセメントを散水しながら
転圧することを特徴とする地盤改良工法。1. A soft ground is excavated to a supporting ground surface, and subsequently, an aggregate for poorly mixed concrete is spread over the supporting ground surface to a certain thickness, and cement is provided on the aggregate for poorly mixed concrete. A ground improvement method characterized by laying to a certain thickness, subsequently kneading the aggregate for poorly mixed concrete and cement, and then compacting the aggregate and cement for poorly mixed concrete with watering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31809287A JPH0730545B2 (en) | 1987-12-16 | 1987-12-16 | Ground improvement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31809287A JPH0730545B2 (en) | 1987-12-16 | 1987-12-16 | Ground improvement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01163312A JPH01163312A (en) | 1989-06-27 |
| JPH0730545B2 true JPH0730545B2 (en) | 1995-04-05 |
Family
ID=18095392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31809287A Expired - Fee Related JPH0730545B2 (en) | 1987-12-16 | 1987-12-16 | Ground improvement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730545B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037413A (en) * | 2004-07-23 | 2006-02-09 | East Japan Railway Co | Ground improvement method under track and ground improvement rod |
| JP2013213703A (en) * | 2012-03-30 | 2013-10-17 | Ihi Corp | Crushed aggregate |
-
1987
- 1987-12-16 JP JP31809287A patent/JPH0730545B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01163312A (en) | 1989-06-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |