JPH0751770B2 - Ground improvement method for construction - Google Patents

Ground improvement method for construction

Info

Publication number
JPH0751770B2
JPH0751770B2 JP62113139A JP11313987A JPH0751770B2 JP H0751770 B2 JPH0751770 B2 JP H0751770B2 JP 62113139 A JP62113139 A JP 62113139A JP 11313987 A JP11313987 A JP 11313987A JP H0751770 B2 JPH0751770 B2 JP H0751770B2
Authority
JP
Japan
Prior art keywords
ground
construction
reinforcing material
new
sand
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
Application number
JP62113139A
Other languages
Japanese (ja)
Other versions
JPS63280111A (en
Inventor
洋 高森
宗親 浜田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui House Ltd
Original Assignee
Sekisui House Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui House Ltd filed Critical Sekisui House Ltd
Priority to JP62113139A priority Critical patent/JPH0751770B2/en
Publication of JPS63280111A publication Critical patent/JPS63280111A/en
Publication of JPH0751770B2 publication Critical patent/JPH0751770B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、建築用地盤の改良工法に関する。TECHNICAL FIELD The present invention relates to an improved construction method for building ground.

(従来の技術) 従来、セメント系固化材を用いて地盤の表土を改良する
工法(従来例1という)、補強材を入れて地盤を強化す
る工法(従来例2という)、盛土中に補強材を入れて地
盤を強化する工法(従来例3という)等があった。
(Prior Art) Conventionally, a method of improving the surface soil of the ground by using a cement-based solidifying material (referred to as Conventional Example 1), a method of reinforcing the ground by adding a reinforcing material (referred to as Conventional Example 2), a reinforcing material in the embankment There was a construction method (referred to as Conventional Example 3) in which the ground is put in to strengthen the ground.

(発明が解決しようとする問題点) 従来例1は、圧縮強度は高まるが引張り強度がなく、例
えば地盤に垂直方向の圧縮力がかかった場合、地盤に容
易にクラックが入る等の問題があった。
(Problems to be Solved by the Invention) In Conventional Example 1, the compressive strength is increased, but the tensile strength is not, and there is a problem that, for example, when a vertical compressive force is applied to the ground, cracks easily form in the ground. It was

従来例2は、補強材を入れるときに土を乱してしまって
圧縮強度を弱めるという問題があった。
The conventional example 2 has a problem in that the soil is disturbed when the reinforcing material is inserted, and the compressive strength is weakened.

従来例3は、盛土中に補強材を入れるため、地盤の締め
固め不足が生じる等の問題があった。
In the conventional example 3, since the reinforcing material is put in the embankment, there is a problem that the ground is insufficiently compacted.

(問題点を解決するための手段) 本発明は、建築用地全域にわたる現状地盤を掘削して表
土を取除き、この表土を取除いた地盤のベース底に格子
状、網目状等に形成した補強材を配設し、この補強材の
上に質のよい新たな土砂を適当な厚さに敷設し、この新
たな土砂と固化材を混合攪拌した後に転圧して建築用地
盤となす建築用地盤改良工法である。
(Means for Solving Problems) The present invention is to reinforce the existing ground over the entire construction site by excavating the topsoil to remove the topsoil and forming a grid or mesh on the base bottom of the bottoms of the topsoil removed. A new material of high quality is laid on the reinforcing material to a suitable thickness, and the new material is mixed with the solidifying material and stirred, and then compacted to form the ground for construction. It is an improved construction method.

(作用) 軟弱な表土を取除いた地盤の上に補強材を配設し、この
上に質のよい新たな土砂を投入して上地盤を構成するこ
とにより、地盤の圧縮強度・剪断強度とともに引張強度
を高める。
(Function) By placing a reinforcing material on the ground from which the soft topsoil has been removed, and by adding new high-quality earth and sand to this to construct the upper ground, it is possible to improve the compressive strength and shear strength of the ground. Increase tensile strength.

(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) Drawing shows the Example of the ground improvement method for construction of this invention.

まず、掘削機(図示省略)等を用いて建築用地盤全域の
現状地盤1を掘削して約300mm〜500mmくらいの深さの表
土2を取除く(第2図参照)。取除く表土2の厚さは表
土2の軟弱性を考慮して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, the existing ground 1 in the entire building ground is excavated by using an excavator (not shown) or the like to remove the topsoil 2 having a depth of about 300 mm to 500 mm (see FIG. 2). The thickness of the topsoil 2 to be removed may be 200 mm in consideration of the softness of the topsoil 2, or 700
It may be necessary for about mm.

このように表土2を取除いた地盤のベース底3の上に格
子状、網目状等に形成した補強材4を配設する(第2図
参照)。
In this way, the reinforcing material 4 formed in a lattice shape, a mesh shape or the like is arranged on the base bottom 3 of the ground from which the top soil 2 has been removed (see FIG. 2).

補強材4として、例えばプラスチック、鉄筋、竹、ロー
プ、布等が用いられる。補強材4は、格子状、網目状に
形成されたものを基本とするが、その他、単一方向に組
まれたものであってもよい。
As the reinforcing material 4, for example, plastic, rebar, bamboo, rope, cloth or the like is used. The reinforcing material 4 is basically formed in a lattice shape or a mesh shape, but it may be assembled in a single direction.

このように補強材4を配設したベース底3の上に、質の
よい新たな土砂5を適当な厚さ敷設するとともに、この
新たな土砂5の上に適量の固化材6を散布する(第3図
参照)。
In this way, a new quality sand 5 is laid on the base bottom 3 on which the reinforcing member 4 is arranged in an appropriate thickness, and an appropriate amount of the solidifying material 6 is sprinkled on the new sand 5 ( (See FIG. 3).

質のよい新たな土砂5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 high-quality new earth and sand 5, it is preferable to use well-drained mountain sand, river sand, sea sand, Masa earth, etc. alone or in combination.

固化材6として、地盤安全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ット1140(日本セメント
株式会社の商品名)等が好適である。
As the solidifying material 6, a ground safety treating agent, cement or the like is used alone or in combination. As the ground stabilization agent, for example, Fuji Beton (trade name of Keio Kaken Kogyo Co., Ltd.) or Asano Clean Set 1140 (trade name of Nippon Cement Co., Ltd.) is suitable.

適量の固化材6を散布した新たな土砂5を掘削機を用い
て混合攪拌することによって改良土7とする(第4図参
照)。
Improved soil 7 is prepared by mixing and stirring new earth and sand 5 with an appropriate amount of solidified material 6 dispersed therein using an excavator (see FIG. 4).

このように混合攪拌した改良土7の表面を、例えば掘削
機のバケット等によって均らすとともに、改良土7を仮
転圧する。
The surface of the improved soil 7 thus mixed and stirred is leveled by, for example, a bucket of an excavator, and the improved soil 7 is temporarily rolled.

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
作業者によって修正する。
After the temporary rolling pressure is completed, the level of the improved soil 7 is measured, and the operator corrects the place where the level difference is large or the place where there is uneven mixing.

このレベル差等の修正の後、改良土7をローラ等(図示
省略)を用いて本転圧する。
After the correction of the level difference and the like, the improved soil 7 is finally compacted by using a roller or the like (not shown).

本転圧終了後に、改良土7の上に水を散布して含水比を
調整する。
After the completion of this compaction, water is sprinkled on the improved soil 7 to adjust the water content ratio.

適当な養生期間をとることによって上地盤8を構成す
る。
The upper ground 8 is constructed by taking an appropriate curing period.

このようにベース底3に配設した補強材4の上に改良し
た上地盤8を構成することによって建築用地盤9となさ
れる(第5図参照)。
In this way, by constructing the improved upper ground 8 on the reinforcing member 4 arranged on the base bottom 3, the ground 9 is constructed (see FIG. 5).

なお、上地盤8は複数層に分けて形成し、この各層の間
にそれぞれ補強材4を配設してもよい。
The upper ground 8 may be formed by being divided into a plurality of layers, and the reinforcing material 4 may be arranged between the respective layers.

第6図は、このように構成した建築用地盤9が不等沈下
等によって曲がった状態を示している。図中の符号A,B,
Cに特に引張力が発生する。
FIG. 6 shows a state in which the construction ground 9 thus configured is bent due to uneven subsidence or the like. Reference symbols A, B, in the figure
Especially tensile force is generated in C.

このように地盤が曲がっても、補強材4が分担して土の
引張力を抑えるため、地盤としての剛性が高まり、クラ
ックは発生しない。
Even when the ground is bent in this manner, the reinforcing material 4 shares the tensile force of the soil and suppresses the tensile force of the soil, so that the rigidity of the ground is increased and cracks do not occur.

(発明の効果) 軟弱な表土を取除いた地盤の上に格子状、網目状等に形
成された補強材を配設し、この補強材の上に質のよい新
たな土砂を敷設して改良した上地盤を構成する。従っ
て、圧縮強度・剪断強度を高めるとともに、引張強度を
も高めた建築用地盤となすことができる。
(Effect of the invention) Reinforcing material formed in a grid or mesh shape is arranged on the ground from which the soft topsoil has been removed, and new high quality earth and sand is laid on this reinforcing material for improvement. The upper ground which was done is constituted. Therefore, it is possible to obtain a building ground with improved compressive strength / shear strength and tensile strength.

建築用地の全域にわたって地盤を改良しているから、基
礎の部分のみならず、沓石を設置する部分の地盤も強度
が高い。
Since the ground is improved over the entire area of the building site, not only the foundation part, but also the part where the meteorite is installed is strong.

この地盤は、例えば不等沈下が生じても、引張強度があ
るため、地盤にクラック等が入らない。従って、このよ
うな地盤に築いた建物は安定する。
Even if uneven subsidence occurs, the ground has tensile strength, so that the ground does not crack. Therefore, the building built on such ground is stable.

【図面の簡単な説明】[Brief description of drawings]

第1図ないし第5図は本発明建築用地盤改良工法の実施
手順を示し、第1図は建築用地の断面図、第2図は表土
を取除いた地盤のベース底に補強材を配設した断面図、
第3図はこのように補強材を配設したベース底の上に質
のよい新たな土砂を投入するとともにこの新たな土砂の
上に固化材を散布した断面図、第4図は質のよい新たな
土砂と固化材を混合攪拌してなる改良土の断面図、第5
図は上地盤を構成して完成させた建築用地盤の断面図、
第6図はこのようにして完成された建築用地盤が不等沈
下しても補強材によって土の引張力を抑えることを示す
断面図である。 1…現状地盤、2…表土 3…ベース底、4…補強材 5…質のよい新たな土砂、6…固化材 7…改良土、8…上地盤 9…建築用地盤 A,B,C…引張力
1 to 5 show the procedure for carrying out the ground improvement method for construction of the present invention. FIG. 1 is a cross-sectional view of the building land, and FIG. 2 is a reinforcing material provided on the base bottom of the ground from which the topsoil has been removed. Cross section,
Fig. 3 is a cross-sectional view in which high quality new earth and sand is put on the base bottom where the reinforcing material is arranged and the solidifying material is sprinkled on the new earth and sand, and Fig. 4 is of high quality. Sectional view of improved soil prepared by mixing and stirring new soil and solidifying material, No. 5
The figure is a cross-sectional view of the ground for construction completed by constructing the upper ground,
FIG. 6 is a cross-sectional view showing that the reinforcing material suppresses the tensile force of the soil even if the building ground thus completed is unevenly settled. 1… Current ground 2, 2 Topsoil 3… Base bottom 4… Reinforcement material 5… New quality sand, 6… Solidification material 7… Improved soil, 8… Upper ground 9… Construction ground A, B, C… Tensile force

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】建築用地全域にわたる現状地盤を掘削して
表土を取除き、この表土を取除いた地盤のベース底に格
子状、網目状等に形成した補強材を配設し、 この補強材の上に質のよい新たな土砂を適当な厚さに敷
設し、この新たな土砂と固化材を混合攪拌した後に転圧
して建築用地盤となすことを特徴とする建築用地盤改良
工法。
1. A ground material is excavated over the entire area of a building site to remove surface soil, and a reinforcing material formed in a lattice shape, a mesh shape or the like is disposed on the base bottom of the ground surface soil removed. A construction ground improvement method characterized by laying a new good quality sand on top of the above with a suitable thickness, mixing and stirring this new sediment and solidifying material, and then compacting it to form a building ground.
JP62113139A 1987-05-09 1987-05-09 Ground improvement method for construction Expired - Fee Related JPH0751770B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62113139A JPH0751770B2 (en) 1987-05-09 1987-05-09 Ground improvement method for construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62113139A JPH0751770B2 (en) 1987-05-09 1987-05-09 Ground improvement method for construction

Publications (2)

Publication Number Publication Date
JPS63280111A JPS63280111A (en) 1988-11-17
JPH0751770B2 true JPH0751770B2 (en) 1995-06-05

Family

ID=14604550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62113139A Expired - Fee Related JPH0751770B2 (en) 1987-05-09 1987-05-09 Ground improvement method for construction

Country Status (1)

Country Link
JP (1) JPH0751770B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015034439A (en) * 2013-08-09 2015-02-19 兼松日産農林株式会社 Ground improvement structure and ground improvement method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426821U (en) * 1977-07-26 1979-02-21

Also Published As

Publication number Publication date
JPS63280111A (en) 1988-11-17

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