JPH0114378B2 - - Google Patents
Info
- Publication number
- JPH0114378B2 JPH0114378B2 JP56174085A JP17408581A JPH0114378B2 JP H0114378 B2 JPH0114378 B2 JP H0114378B2 JP 56174085 A JP56174085 A JP 56174085A JP 17408581 A JP17408581 A JP 17408581A JP H0114378 B2 JPH0114378 B2 JP H0114378B2
- Authority
- JP
- Japan
- Prior art keywords
- casing
- excavation
- ground
- improvement material
- blade
- 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
- 238000009412 basement excavation Methods 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 30
- 239000002689 soil Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 8
- 239000010802 sludge Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
-
- 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
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は盛土層或は埋立地等の軟弱地盤の改
良方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for improving soft ground such as an embankment layer or reclaimed land.
［従来の技術及び発明が解決しようとする課題］
従来、此種軟弱土盤の改良方法として第１図イ
及びロに示すものが知られている。之は軟弱地盤
１をオーガー２の先端から、例えばセメントミル
クの如き地盤改良材３を噴出して掘削土と混合撹
拌された杭状の改良地盤４を形成し、又は、オー
ガー２による掘削土をこの地盤改良材３にて置換
えて地盤改良材３の固体化した改良地盤が、軟弱
地盤１の中に形成されるものである。又、そのほ
か、掘削孔に砂を充填した砂杭等がある。[Prior Art and Problems to be Solved by the Invention] Conventionally, the methods shown in FIG. 1A and 1B are known as methods for improving this type of soft soil. This is done by squirting a ground improving material 3 such as cement milk from the tip of the auger 2 on the soft ground 1 and mixing it with the excavated soil to form a pile-shaped improved ground 4, or by removing the excavated soil by the auger 2. An improved ground in which the ground improvement material 3 is solidified by replacing it with this ground improvement material 3 is formed in the soft ground 1. In addition, there are sand piles filled with sand in the excavated hole.
しかし、このようにオーガー２にて円柱状に掘
削されるため、改良地盤４は充実断面となり、こ
の結果、掘削すべき土量が多く、且つ、必要な地
盤改良材３も多量となり、工数及び材料費の双方
の面で不経済となり、更に、オーガー径即ち改良
地盤４の径が大きくなるほど、経費が著しく増加
することになる。 However, since the auger 2 is used to excavate in a cylindrical shape, the improved ground 4 has a solid cross section, and as a result, the amount of soil to be excavated is large, and the required ground improvement material 3 is also large, resulting in a large amount of man-hours and This is uneconomical both in terms of material costs, and furthermore, as the diameter of the auger, ie, the diameter of the improved ground 4, increases, the cost increases significantly.
而も、改良地盤４の径が大きくなるほど、その
重量も半径の２乗に比例して増加するので、自重
によつて改良地盤４が沈下し、或は周囲の軟弱地
盤１の沈下をも招来せしめることもあつた。 However, as the diameter of the improved ground 4 increases, its weight increases in proportion to the square of the radius, so the improved ground 4 may sink due to its own weight, or the surrounding soft ground 1 may also sink. There were times when I was forced to do something.
そこで、上記欠陥を解消するために特開昭52−
34508号公報記載のものが提案せられている。之
は円筒状のケーシングに掘削翼を取付け、該ケー
シングを回転せしめて円筒状の掘削孔を形成する
と共に、該ケーシングに設けた硬化剤供給パイプ
から硬化剤等を前記掘削孔に供給し乍ら前記掘削
翼にて撹拌せしめるようにした軟弱地盤の改良方
法が示されている。 Therefore, in order to eliminate the above defects,
The one described in Publication No. 34508 has been proposed. A drilling blade is attached to a cylindrical casing, the casing is rotated to form a cylindrical drilling hole, and a hardening agent, etc. is supplied to the drilling hole from a hardening agent supply pipe provided in the casing. A method for improving soft ground is shown in which stirring is performed using the excavation blade.
而して、前記公報に示されている方法は、主と
して海底面に沈積したヘドロを改良せんとするも
のであるから、円筒状ケーシングにはその一部に
掘削翼を設けて、該ヘドロを掘削するようにして
ある。そして、該掘削部位に硬化剤注入パイプを
対峙せしめて硬化剤等を噴射せしめるのである。 Since the method disclosed in the above-mentioned publication is mainly aimed at improving sludge deposited on the seabed, a part of the cylindrical casing is provided with an excavation blade to excavate the sludge. It is designed to do so. A hardening agent injection pipe is then placed opposite the excavated area to inject hardening agent and the like.
然るに、上記公報記載のものは海底のヘドロ層
について施工するときには効果的であるが、ヘド
ロ層に比し、硬質の粘土層や盛土層或は埋立地等
の軟弱土盤に施工することは極めて困難となる。 However, although the method described in the above publication is effective when applied to a sludge layer on the seabed, it is extremely difficult to apply it to soft soil such as a hard clay layer, embankment layer, or reclaimed land compared to a sludge layer. It becomes difficult.
依つて、公報記載の方法を効果的に利用し、粘
土層や盛土層或は埋立地等についても前記方法を
実施するために解決せらるべき技術的課題が生じ
てくるのであり、本発明は該課題を解決すること
を目的とする。 Therefore, a technical problem arises that must be solved in order to effectively utilize the method described in the publication and to implement the method on clay layers, embankments, reclaimed land, etc. The purpose is to solve this problem.
［課題を解決するための手段］
この発明は上記目的を達成せんとして提案せら
れたものであり、円筒状ケーシングを回転させ乍
ら、該ケーシングに取付けた掘削翼にて軟弱土に
円筒状の掘削孔を形成し、更に、該ケーシングに
設けた地盤改良材の注入管から地盤改良材を前記
掘削孔に供給し乍ら前記掘削翼にて撹拌混合せし
めるようにした軟弱地盤の改良方法に於て、前記
ケーシングにはその外周面の全周に及んで螺旋状
の掘削翼を設け、更に、該掘削翼を貫通した複数
本の前記注入管がケーシングの上下面に及んで配
設されると共に、該ケーシングに複数個の窓を開
穿し、更に、該ケーシングの下端部に設けられた
先端掘削刃の掘削に順応して、該先端掘削刃によ
る掘削部位に前記地盤改良材を噴射し、前記円筒
状の掘削孔を硬化して中空円筒状の柱体を造成す
るようにしたことを特徴とする軟弱地盤の改良方
法を提供せんとするものである。[Means for Solving the Problems] This invention was proposed to achieve the above object, and while rotating a cylindrical casing, a cylindrical casing is drilled into soft soil using an excavating blade attached to the casing. In a method for improving soft ground, an excavation hole is formed, and a soil improvement material is supplied to the excavation hole from an injection pipe for the soil improvement material provided in the casing, and is stirred and mixed by the excavation blade. The casing is provided with a spiral digging blade extending over the entire outer circumferential surface of the casing, and furthermore, the plurality of injection pipes passing through the drilling blade are arranged over the upper and lower surfaces of the casing. , opening a plurality of windows in the casing, and further injecting the ground improvement material into the excavated area by the tip excavation blade in accordance with the excavation by the tip excavation blade provided at the lower end of the casing; It is an object of the present invention to provide a method for improving soft ground, characterized in that the cylindrical excavation hole is hardened to form a hollow cylindrical column.
［作用］
ケーシングに窓を開穿してある為、該ケーシン
グの下端部に設けた先端掘削刃にて地盤を掘削し
て進むとき、地盤改良材が前記窓を通過して掘削
土との混合を良好にすると共に、地盤改良材と掘
削土がケーシング内周面近傍に集中するようなこ
とがあつても、該窓を通つてケーシングの内外周
に均一に拡散できるようになり、ケーシングの回
転も極めて円滑となつて掘進動作を助成するので
ある。更に、ケーシングの外側面全周に及んで螺
旋状の掘削翼に配設したので、掘削時に於て、地
盤改良材と掘削土との混合撹拌を極めて効果的に
し、良好な筒状の改良地盤が形成できるのであ
る。更に、ケーシングの下端部に先端掘削刃が設
けられているので、粘土層や盛土層或は埋立地等
の軟弱地盤の掘削に適している。[Function] Since the casing has a window cut out, when the ground is excavated with the cutting edge provided at the lower end of the casing, the ground improvement material passes through the window and mixes with the excavated soil. In addition, even if the ground improvement material and excavated soil are concentrated near the inner circumferential surface of the casing, they can be uniformly spread to the inner and outer circumferences of the casing through the windows, preventing rotation of the casing. It also becomes extremely smooth and assists the digging operation. Furthermore, since the spiral excavation blades are arranged around the entire outer circumference of the casing, the mixing and agitation of the ground improvement material and excavated soil is extremely effective during excavation, and a good cylindrical improved soil is created. can be formed. Furthermore, since the tip excavation blade is provided at the lower end of the casing, it is suitable for excavating soft ground such as a clay layer, an embankment layer, or a reclaimed land.
［実施例］
以下、この発明の一実施例を別紙添付図面に従
つて詳述する。尚、説明の都合上、従来公知に属
する技術も同時に説明する。第２図に於て、掘削
体５は円筒状ケーシング６と該ケーシング６の外
側面の全周に及んで配設された螺旋状の掘削翼７
並びに、該ケーシング６の下端部に取付けられた
先端掘削刃８，８…によつて構成されている。そ
して、ケーシング６の上下面に及んで配設された
複数本の地盤改良材３の注入管９，９…が前記螺
旋状の掘削翼７を上下に貫通して設けられてい
る。そして、この注入管９，９…から送り込んだ
セメントミルクモルタル、或は砂の如き地盤改良
材３を先端掘削刃８…の噴出口１０，１０…から
下方へ噴出できるように構成している。[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, conventionally known techniques will also be explained at the same time. In FIG. 2, the excavating body 5 includes a cylindrical casing 6 and a spiral excavating blade 7 disposed over the entire circumference of the outer surface of the casing 6.
Further, it is constituted by tip excavating blades 8, 8, . . . attached to the lower end of the casing 6. A plurality of injection pipes 9, 9, . . . for the ground improvement material 3, which are disposed over the upper and lower surfaces of the casing 6, are provided to vertically penetrate the spiral excavation blade 7. The ground improvement material 3 such as cement milk mortar or sand fed through the injection pipes 9, 9, .
又、前記掘削体５の上部に設けている連結部１
１を、図示外のオーガーマシンに連結し、該掘削
体５を回転して中空円筒状の掘削孔１２を掘削す
ると共に、噴出口１０，１０…から地盤改良材３
を掘削孔１２内に充填し、掘削翼７にて地盤改良
材３と掘削土とを混合撹拌し、第３図のように所
定の深さで中空円筒状の改良地盤１３を形成す
る。 Further, the connecting portion 1 provided on the upper part of the excavation body 5
1 is connected to an auger machine (not shown), and the excavation body 5 is rotated to excavate a hollow cylindrical excavation hole 12, and at the same time, the ground improvement material 3 is discharged from the spout ports 10, 10...
is filled into the excavated hole 12, and the ground improvement material 3 and the excavated soil are mixed and stirred by the excavation blade 7 to form a hollow cylindrical improved ground 13 at a predetermined depth as shown in FIG.
そして、第２図のようにケーシング６の外周部
の適宜箇所に窓６ａ…を設けておいて、掘削体５
の掘削動作の際に地盤改良材３が、これらの窓６
ａ…を通過して地盤改良材３と掘削土との混合を
良好とすると共に、ケーシング６の内周面付近に
集中しがちな地盤改良材３と掘削土が、これらの
窓６ａ…を通つてケーシング６の内外周に均一に
拡散できると共に、ケーシング６の回転が滑らか
となるようにしている。 Then, windows 6a are provided at appropriate locations on the outer circumference of the casing 6 as shown in FIG.
During the excavation operation of the ground improvement material 3, these windows 6
a... to improve the mixing of the ground improvement material 3 and excavated soil, and the ground improvement material 3 and excavated soil, which tend to concentrate near the inner peripheral surface of the casing 6, pass through these windows 6a... This allows the particles to be uniformly diffused around the inner and outer peripheries of the casing 6, and allows the casing 6 to rotate smoothly.
尚、掘削孔１２の厚み即ち改良地盤１３の壁厚
の調節は、先端掘削刃８の半径方向長さを変更す
ることによつて可能である。 The thickness of the excavated hole 12, that is, the wall thickness of the improved ground 13, can be adjusted by changing the radial length of the cutting edge 8.
次に、この発明の方法の応用例として掘削孔１
２に充填した地盤改良材３が固形化しないうち
に、第４図のように鉄筋籠１４を掘削孔１２に挿
入すれば、鉄筋籠１４にて補強された摩擦杭１５
を軟弱地盤１の地中に形成することができる。 Next, as an application example of the method of this invention, a drilling hole 1
If the reinforcing bar cage 14 is inserted into the excavated hole 12 as shown in FIG. 4 before the soil improvement material 3 filled in the ground improvement material 3 is solidified, the friction pile 15 reinforced with the reinforcing bar cage 14 will be removed.
can be formed underground in the soft ground 1.
又、第５図イのように改良地盤１３の内部の土
１６を例えばハンマークラブ１７又はリバース等
を用いて掘削して孔１８を形成し、この孔１８に
鉄筋籠１９を挿入してコンクリートを打設すれ
ば、強固な現場打ち支持杭２０を造成することが
できる。 Further, as shown in Fig. 5A, the soil 16 inside the improved ground 13 is excavated using, for example, a hammer club 17 or a reverse tool to form a hole 18, and a reinforcing bar cage 19 is inserted into this hole 18 to pour concrete. By driving, a strong cast-in-place support pile 20 can be created.
更に、第６図乃至第７図に夫々平面視を示した
ように改良地盤１３…を互いに連接して連続壁２
１に、又はウエル２２に形成して河川や海岸等の
よう壁に使用できるほか、第８図のように改良地
盤１３を連接して囲状とし、これらの改良地盤１
３…をコンクリートにて一体化して中空状で、而
もコンクリート等の高価な材料の使用量の少ない
基礎２３を造成することもできることは当然であ
る。 Furthermore, as shown in plan view in FIGS. 6 and 7, the improved ground 13 is connected to each other to form a continuous wall 2.
1 or a well 22 and used as a wall such as on a river or coast, or as shown in FIG.
3... can be integrated with concrete to create a hollow foundation 23 that uses less expensive materials such as concrete.
［発明の効果］
本発明は上述せる一実施例に於て詳述せる如
く、ケーシングに窓を開穿してあるため、該ケー
シング下端部に設けた先端掘削刃によつて地盤を
掘削して進むとき、該先端掘削刃の掘削面に噴射
される地盤改良材が前記窓を通過して掘削土との
混合を良好にすると共に、地盤改良材と掘削土が
ケーシング内周面近傍に集中するようなことがあ
つても、該窓を通つてケーシングの内外周に均一
に拡散できるようになり、ケーシングの回転も極
めて円滑となつて掘進動作を助成するのである。
更に、ケーシングの外側面全周に及んで螺旋状の
掘削翼を配設したので、掘削時に於て、地盤改良
材と掘削土との混合撹拌を極めて効果的にし、良
好な筒状の改良地盤が形成できるのである。更
に、ケーシングの下端部に先端掘削刃が設けられ
ているので、ヘドロ層より硬質の粘土層や盛土層
或は埋立地等の軟弱地盤の掘削も可能となり、そ
して、地盤改良材の注入管はケーシングの外側面
全周に及んで螺旋状に配設された掘削翼を上下に
貫通して複数本設けられているので、該注入管も
安定的に固定され掘削翼が掘削土を撹拌すると
き、縦に配設された該注入管は該撹拌作用を助成
する等、正に、諸種の効果を奏する発明である。[Effects of the Invention] As described in detail in the above-mentioned embodiment, the present invention has a window in the casing, so that the ground can be excavated with the cutting edge provided at the lower end of the casing. When advancing, the ground improvement material injected onto the excavation surface of the tip excavation blade passes through the window and mixes well with the excavated soil, and the ground improvement material and excavated soil are concentrated near the inner peripheral surface of the casing. Even if such a situation occurs, the particles can be uniformly diffused to the inner and outer circumferences of the casing through the window, and the rotation of the casing becomes extremely smooth, thereby assisting the digging operation.
Furthermore, since the spiral cutting blades are arranged around the entire outer circumference of the casing, the mixing and agitation of the ground improvement material and excavated soil is extremely effective during excavation, and a good cylindrical improved ground is created. can be formed. Furthermore, since the tip excavation blade is provided at the lower end of the casing, it is possible to excavate soft ground such as clay layers, embankments, and reclaimed land that are harder than the sludge layer, and the injection pipe for the ground improvement material is Since a plurality of injection pipes are provided vertically penetrating the excavation blades arranged in a spiral pattern around the entire outer circumference of the casing, the injection pipes are also stably fixed when the excavation blades stir the excavated soil. This is an invention that has various effects such as the vertically arranged injection pipe assisting the stirring action.
第１図イ，ロは地盤改良の従来の方法を示す縦
断面図、第２図以降はこの発明方法の実施例を示
すもので、第２図は掘削状態を示す縦断面図、第
３図、第４図、第５図ロは改良地盤の夫々の実施
例を示す縦断面図、第５図イは第５図ロにおける
掘削途中を示す縦断面図、第６図乃至第８図は改
良地盤の夫々の応用例における平面図である。
１……軟弱地盤、２……オーガー、３……地盤
改良材、４，１３……改良地盤、５……掘削体、
６……ケーシング、６ａ……窓、７……掘削翼、
８……先端掘削刃、９……注入管、１０……噴出
口、１１……連結部、１２……掘削孔、１４，１
９……鉄筋籠、１５……摩擦杭、１６……土、１
７……ハンマークラブ、１８……孔、２０……現
場打ち支持杭、２１……連続壁、２２……ウエ
ル、２３……基礎。
Figures 1A and 2B are vertical cross-sectional views showing the conventional method of soil improvement, Figures 2 and subsequent figures show examples of the method of this invention, and Figure 2 is a vertical cross-sectional view showing the state of excavation. , Figures 4 and 5B are longitudinal cross-sectional views showing the respective examples of improved ground, Figure 5A is a vertical cross-sectional view showing the middle of excavation in Figure 5B, and Figures 6 to 8 are the improved ground. It is a top view in each application example of the ground. 1... Soft ground, 2... Auger, 3... Ground improvement material, 4, 13... Improved ground, 5... Excavation body,
6...Casing, 6a...Window, 7...Drilling wing,
8...Tip drilling blade, 9...Injection pipe, 10...Spout port, 11...Connection part, 12...Drilling hole, 14,1
9...Reinforced cage, 15...Friction pile, 16...Soil, 1
7... Hammer club, 18... Hole, 20... Cast-in-place support pile, 21... Continuous wall, 22... Well, 23... Foundation.
Claims (1)
ングに取付けた掘削翼にて軟弱土に円筒状の掘削
孔を形成し、更に、該ケーシングに設けた地盤改
良材の注入管から地盤改良材を前記掘削孔に供給
し乍ら前記掘削翼にて撹拌混合せしめるようにし
た軟弱地盤の改良方法に於て、前記ケーシングに
はその外側面の全周に及んで螺旋状の掘削翼を設
け、更に、該掘削翼を貫通した複数本の前記注入
管がケーシングの上下面に及んで配設されると共
に、該ケーシングに複数個の窓を開穿し、更に、
該ケーシングの下端部に設けられた先端掘削刃の
掘削に順応して、該先端掘削刃による掘削部位に
前記地盤改良材を噴射し、前記円筒状の掘削孔を
硬化して中空円筒状の柱体を造成するようにした
ことを特徴とする軟弱地盤の改良方法。 ２ 前記中空円筒状の柱体内に鉄筋籠を挿入した
ことを特徴とする請求項１記載の軟弱地盤の改良
方法。 ３ 前記中空円筒状の柱体内の土砂を除去し、こ
の内部に鉄筋籠を挿入して地盤改良材を注入し一
体化することを特徴とする請求項１及び２記載の
軟弱地盤の改良方法。[Scope of Claims] 1. While rotating a cylindrical casing, a cylindrical excavation hole is formed in soft soil using an excavation blade attached to the casing, and an injection pipe for a ground improvement material is provided in the casing. In the method for improving soft ground, in which a ground improvement material is supplied to the excavation hole and mixed with agitation by the excavation blade, the casing is provided with a spiral excavation extending over the entire circumference of the outer surface of the casing. A blade is provided, and a plurality of injection pipes passing through the excavation blade are disposed over the upper and lower surfaces of the casing, and a plurality of windows are bored in the casing, and further,
The ground improvement material is injected into the excavated area by the tip excavation blade provided at the lower end of the casing, and the cylindrical excavation hole is hardened to form a hollow cylindrical column. A method for improving soft ground characterized by creating a body. 2. The method for improving soft ground according to claim 1, characterized in that a reinforcing bar cage is inserted into the hollow cylindrical column. 3. The method for improving soft ground according to claims 1 and 2, characterized in that earth and sand inside the hollow cylindrical column is removed, a reinforcing bar cage is inserted inside the column, and a ground improvement material is injected and integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56174085A JPS5876607A (en) | 1981-10-30 | 1981-10-30 | Improving method for soft ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56174085A JPS5876607A (en) | 1981-10-30 | 1981-10-30 | Improving method for soft ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5876607A JPS5876607A (en) | 1983-05-09 |
| JPH0114378B2 true JPH0114378B2 (en) | 1989-03-10 |
Family
ID=15972384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56174085A Granted JPS5876607A (en) | 1981-10-30 | 1981-10-30 | Improving method for soft ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5876607A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61162624A (en) * | 1985-01-07 | 1986-07-23 | N I T:Kk | Underground stable supporting layer and forming method thereof |
| IT1404104B1 (en) * | 2011-01-11 | 2013-11-08 | Mammina | MEANS FOR THE CONSOLIDATION OF LAND AND CONSOLIDATION PROCEDURE WHICH WAS USED BY SUCH MEANS |
| JP6477624B2 (en) * | 2016-07-20 | 2019-03-06 | コベルコ建機株式会社 | Mechanical stirring ground improvement device |
| JP6901928B2 (en) * | 2017-07-21 | 2021-07-14 | 鹿島建設株式会社 | Pile construction method |
| JP2019039140A (en) * | 2017-08-22 | 2019-03-14 | 鹿島建設株式会社 | Method for constructing ground improvement body and method for constructing pile |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234508A (en) * | 1975-09-10 | 1977-03-16 | Takenaka Komuten Co | Poor subsoil improving machine |
-
1981
- 1981-10-30 JP JP56174085A patent/JPS5876607A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234508A (en) * | 1975-09-10 | 1977-03-16 | Takenaka Komuten Co | Poor subsoil improving machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5876607A (en) | 1983-05-09 |
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