JPH08177365A - Soil improvement work for construction and earth auger device therefor - Google Patents
Soil improvement work for construction and earth auger device thereforInfo
- Publication number
- JPH08177365A JPH08177365A JP33792294A JP33792294A JPH08177365A JP H08177365 A JPH08177365 A JP H08177365A JP 33792294 A JP33792294 A JP 33792294A JP 33792294 A JP33792294 A JP 33792294A JP H08177365 A JPH08177365 A JP H08177365A
- Authority
- JP
- Japan
- Prior art keywords
- rods
- hole
- auger shaft
- pedestal
- ground
- 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
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は建設等地盤改良工法に
おいて、地中の掘孔土砂を殆ど地上に排土することなく
地中に崩壊の憂いもない強固な孔壁を有してなる杭孔を
きわめて容易確実に掘削行わしめんとする建設用地盤の
改良工法とその掘孔装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement method for construction and the like, which is a pile having a strong hole wall that does not cause collapse in the ground and does not almost discharge the earth and sand into the ground. The present invention relates to a method for improving a construction ground and an apparatus for drilling the hole, which makes it possible to dig a hole very easily and surely.
【０００２】[0002]
【従来の技術】従来、建築等基礎地盤を掘孔する所謂，
基礎地盤改良工法において地中を掘削する手段として種
々の基礎地盤の掘削装置が開発されている。その一例と
して発明者が先にオーガー面周面を三角または四角形に
形成し、該形成面の回転作用により掘削土壌を掘孔周部
に押圧し強固な孔壁を造成することを可能とした掘孔装
置（特許第１３０８０２２号）を開発した。しかるに上
記、ロッド面による場合には掘削土壌を地上に揚土する
ことなく孔周面に圧密せる強固な孔壁がきわめて容易に
造成出来得るという利点を有している反面、オーガー装
置を地上へ抜扞時において孔内に充満せる空気に吸引力
が生じ、孔壁及び杭孔周辺の土砂が崩壊し、これがため
に先に掘孔せる杭孔底部下層内に該土壌が落土し詰孔す
るという重大な欠点のあることが判明した。かかる欠点
を解決する手段として更に発明者は上記オーガ面による
圧密作用に代えて図１に示す如く、先掘ヘッドａの上部
に数本の圧締ロッドｒ、ｒをオーガー軸ｏを軸として外
周に適宜の間隔を隔てて四角形、または三角形状に囲僥
配設してなる掘孔装置を発明し、先述せる掘削中におけ
る杭孔の崩壊を防止することに成功し業界において絶大
な好評を呈していたが該工法による場合には上記掘孔作
業中において、掘削せる周辺の土砂が各圧締ロッドｒ、
ｒ間の空隙ｂ内に流入し、これが回転時において目詰り
し、ついには固結する等して回転作動が不完全である事
態が発生する。2. Description of the Related Art Conventionally, a so-called
Various foundation ground excavation devices have been developed as means for excavating the ground in the foundation ground improvement method. As an example, the inventor first formed the auger surface peripheral surface into a triangular shape or a quadrangular shape, and by the rotating action of the forming surface, it made possible to press the excavated soil against the peripheral portion of the excavated hole to form a strong hole wall. A hole device (Japanese Patent No. 1308022) was developed. However, when the rod surface is used, it has the advantage that a strong hole wall that can be compacted on the hole peripheral surface can be created very easily without excavating the excavated soil on the ground, but on the other hand, the auger device can be grounded. At the time of extraction, suction force is generated in the air that fills the inside of the hole, and the sediment around the hole wall and the pile hole collapses, which causes the soil to fall into the lower layer of the bottom of the pile hole that is to be dug earlier and the closed hole It turned out to have a serious drawback. As a means for solving such a drawback, the inventor further replaces the consolidation action by the auger surface, and as shown in FIG. 1, several clamping rods r, r are provided on the upper part of the drilling head a with the auger shaft o as an outer periphery. Inventing a drilling hole device that is arranged in a square or triangular shape at appropriate intervals, and succeeded in preventing the collapse of the pile hole during the excavation described above, and it has shown great popularity in the industry. However, in the case of this construction method, during the above-mentioned drilling work, the earth and sand around the excavation work are compressed by the compression rods r,
There is a situation in which the rotation operation is incomplete due to the fact that it flows into the space b between the r and is clogged during rotation and finally solidifies.
【０００３】[0003]
【発明が解決しようとする課題】この発明は、上記夫々
の欠陥に鑑みて改良且つ改良を加え種々実験の結果、こ
れらの欠点を根本的に解決しようとするを主な課題とし
ているものであって、地中掘削時において孔内に発生せ
る空気はもとより、掘削作業中において、特に問題とい
われていた掘削時の排土、即ち土壌の逃場を積極的に杭
間内に導入すると同時に該導入土壌を地上に殆ど排土す
ることなく、該排土土砂を逆に利用してこれを掘孔周壁
に強力に押開し、以て強固な杭孔を極めて容易確実に造
成しようとするをその主な目的としている。DISCLOSURE OF THE INVENTION The main object of the present invention is to improve and make improvements in view of the above respective defects, and as a result of various experiments, to fundamentally solve these defects. In addition to the air generated in the hole during the underground excavation, the soil discharge during the excavation, which is said to be a problem during the excavation, that is, the escape of the soil, is actively introduced into the space between the piles at the same time. The introduced soil is hardly discharged to the ground, but the discharged soil is used in reverse to strongly push it against the peripheral wall of the borehole, thereby attempting to construct a strong pile hole very easily and surely. Its main purpose is.
【０００４】[0004]
【課題を解決するための手段】上記、目的を達成する手
段としてこの発明に係る掘孔装置は、図面にてその一例
を示している如く、先端部に先掘刃２を有してなるスク
リューヘッド１の上部に台座３を設け、該台座３にオー
ガ軸４を軸に外周部に数本の圧締ロッド５，５を一定の
間隔で四角形または三角形状に立設すると共に中央オー
ガ軸４と各圧締ロッド５，５間に拡開誘導板６を張設せ
しめた特殊形状の掘孔装置を杭打設時において杭打機に
て所定の地盤上に吊設し、しかる後に動力を駆動して上
記掘孔装置を回転させながら地盤に杭孔Ａを掘孔行わし
めるが、該回転掘進時に上記拡開誘導板６の作用にて各
ロッド５，５間に流入せる土砂を外周に押し拡げ、該周
辺に押開せる土砂を回転する圧締ロッド５，５の柱周面
にて掘削孔壁に圧締し、掘孔周部に強固な圧密壁Ａ’を
造成しようとすることを特徴とする建設用地盤の改良工
法とその掘孔装置を提供することにある。As a means for achieving the above-mentioned object, a drilling device according to the present invention is a screw having a tip drilling blade 2 at its tip as shown in the drawings. A pedestal 3 is provided on the upper part of the head 1, and several squeezing rods 5 and 5 are erected on the pedestal 3 around the auger shaft 4 at regular intervals in a quadrangular or triangular shape and a central auger shaft 4 is provided. When the pile driving is performed, a drilling device having a special shape in which the expansion guide plate 6 is stretched between the pressure rods 5 and the pressing rods 5 is suspended by a pile driver on a predetermined ground, and then power is applied. The pile hole A is drilled in the ground while driving to rotate the drilling device, but earth and sand which flows into between the rods 5 and 5 by the action of the expanding guide plate 6 at the time of the rotary drilling is provided on the outer periphery. It is pressed against the borehole wall by the pillar circumferential surface of the pressing rods 5 and 5 that rotate and spread the earth and sand that can be pushed open to the periphery. And to provide an improved method and its Juana device for a construction for ground, characterized in that attempts to construct a robust compaction wall A 'in Juana periphery.
【０００５】[0005]
【作用】次に上記、装置による施工例を説明すると、先
ず装置を杭打機にセットして所定地上に定置し、しかる
後にオーガ軸４を駆動回転行わしめるにおいてスクリュ
ーヘッド１先端の先掘刃２が回転し先端地盤を撹乱しな
がら掘進するが該掘進と同時にスクリューヘッド１のス
クリュー羽根による作用にて掘削土壌を上方ならびに周
辺に拡開しながら所定深度まで地中を掘進する。上記掘
進に伴ってスクリュー掘削による押し上げられた孔周辺
の土壌の一部は孔周に拡開し上昇するもその殆どは上部
に連設せる各圧締ロッド５，５間の空隙ｂ内に流入する
も、該空隙ｂ内に流入せる土砂は拡開誘導板６の回転作
用にて図２及び図４の矢印方向に外方へ押出すると同
時に該押出土砂が回転する各圧締ロッド５，５面の移動
作用によって図４に示す如く孔周壁面に混練状に塗着圧
締してなる強固な圧密壁Ａ’を造成する。また請求項３
項の如く、上記の拡開誘導板６を回転方向に板面全体を
湾曲形成行わしめることによってロッド５，５間に流入
せる土砂をより良好に何らの抵抗もなくより円滑、確実
に拡開し圧密即ち圧締することが出来得るのである。Next, the construction example of the apparatus will be described. First, the apparatus is set on a pile driver and placed on a predetermined ground, and then the auger shaft 4 is driven and rotated. Although 2 rotates and excavates while disturbing the tip ground, at the same time as the excavation, by the action of the screw blades of the screw head 1, the excavated soil is excavated upward and to the periphery and excavated to a predetermined depth. A part of the soil around the hole pushed up by the screw excavation along with the above-mentioned excavation spreads to the hole periphery and rises, but most of it flows into the space b between the compression rods 5 and 5 that can be connected to the upper part. However, the earth and sand which flow into the space b are pushed outward by the rotating action of the expansion guide plate 6 in the direction of the arrows in FIGS. As a result of the movement of the surface, as shown in FIG. 4, a strong compaction wall A ′ is formed by kneading and pressing the peripheral wall surface of the hole. Claim 3
As described above, by curving the entire plate surface in the rotation direction of the expansion guide plate 6, the earth and sand flowing in between the rods 5 and 5 can be expanded smoothly, reliably and smoothly without any resistance. It can then be compacted.
【０００６】かくして上記、掘進が目的地層に到達する
と、地上よりオーガ軸４の軸内に貫設せるモルタル送注
管８を通して地中の掘孔内にモルタル等の凝結材を噴射
充填しながら装置全体を地上に抜扞し、しかる後に該掘
削杭孔Ａ内にコンクリート杭等の既成杭Ｐを挿入打設す
ることによって図４の如く強固な圧密壁Ａ’を有して
なる建設用地盤を容易に造成求めることが出来得るので
ある。また、この発明による場合には掘削せる杭孔Ａの
孔周が強固に圧密壁Ａ’に形成されているがために、従
来の如く杭孔施工後においても孔壁が崩壊する等の憂い
もないので杭孔の掘削後に該掘孔内にモルタルを充填
し、しかる後に既成杭Ｐを打設行わしめることも可能で
ある。[0006] Thus, when the above-mentioned excavation reaches the destination layer, the apparatus is sprayed and filled with a setting material such as mortar into the excavation hole in the ground through the mortar injecting pipe 8 penetrating from the ground into the shaft of the auger shaft 4. The construction ground having a strong consolidation wall A ′ as shown in FIG. 4 is obtained by pulling the whole body to the ground and then inserting and placing an existing pile P such as a concrete pile into the excavated pile hole A. It can be easily created. Further, in the case of the present invention, since the hole periphery of the pile hole A to be excavated is firmly formed on the consolidation wall A ', there is a concern that the hole wall may collapse even after the pile hole construction as in the conventional case. Since there is no pile hole, it is also possible to fill the mortar into the hole after excavating the pile hole and then to drive the prefabricated pile P.
【０００７】[0007]
【実施例】以下、この発明に用いる地盤掘孔装置の実施
例を説明すると、１は適宜の長さ及び径巾を有し、且つ
周部にスクリュー翼片を一体的に付設してなるスクリュ
ーヘッドにて下方先端には先掘刃２が取り付けられてい
る。また該スクリューヘッド１の上部には台座３を連接
設け、且つ該台座の中心に上記スクリューヘッド１と連
通せるオーガ軸４を連結すると共に該オーガ軸４を軸と
して数本の支持扞７，７，７を放射状に延出し、夫々の
先端部に外周面を円形面に形成してなる丸棒等にて形成
せる圧締ロッド５，５を取り付け固定する。なお上記圧
締ロッド５，５はオーガ軸４を軸としてスクリューヘッ
ド１のスクリュー翼巾と略同径寸とし且つ一定の間隔を
隔てて内部に空隙ｂを形成すると共外周面全体を四角
形、或いは三角形状に囲僥配設してなるもので中央のオ
ーガ軸４と上記各配設せる圧締ロッド５間に拡開誘導板
６を一体的に配設してなるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ground drilling device used in the present invention will be described below. 1 is a screw having an appropriate length and diameter width, and a screw blade piece integrally attached to the peripheral portion. A tip blade 2 is attached to the lower tip of the head. Further, a pedestal 3 is connected to the upper part of the screw head 1, and an auger shaft 4 that can communicate with the screw head 1 is connected to the center of the pedestal, and several supporting rods 7, 7 are provided around the auger shaft 4. , 7 are radially extended, and clamping rods 5, 5 formed by a round bar or the like having an outer peripheral surface formed into a circular surface are attached and fixed to the respective tip ends. The pressing rods 5 and 5 have substantially the same diameter as the screw wing width of the screw head 1 with the auger shaft 4 as an axis, and gaps b are formed in the inside at regular intervals. The expansion guide plate 6 is integrally arranged between the central auger shaft 4 and the above-mentioned pressing rods 5 arranged in a triangular shape.
【０００８】また、上記拡開作動をより有効とするがた
めに拡開誘導板６をオーガ回転方向に対して板面全体を
湾曲形成することも一考である。なお符号８はオーガ軸
４内に縦貫せるモルタル等の送注用としてのモルタル送
注管で先掘刃２先端に開孔せるモルタル噴射孔９と連通
されている。In order to make the expanding operation more effective, it is also a consideration to form the expanding guide plate 6 so that the entire plate surface is curved with respect to the auger rotation direction. Reference numeral 8 is a mortar injection pipe for vertically injecting mortar or the like into the auger shaft 4 and is communicated with a mortar injection hole 9 which is opened at the tip of the cutting blade 2.
【０００９】[0009]
【発明の効果】この発明に係る地盤掘孔装置は上記の如
く、スクリューヘッド１の上部にオーガ軸４を軸として
数本の圧締ロッド５，５を配設し、且つ該オーガ軸４と
各圧締ロッド５間に拡開誘導板６を張設してなるもので
あるから、先掘刃２による掘削と同時に圧締ロッド５，
５が回転し、かかる圧締ロッド５，５による回転作用に
よって孔周壁に掘削土砂を圧締するが、更に各圧締ロッ
ド５，５の空隙ｂ内に流入せる土砂をも拡開誘導板６の
作用にて空隙ｂ内に溜積することなく積極的に外方に誘
導拡開し、該拡開土砂が圧締ロッド５，５による回転に
よる圧締作用と競合してより確実、強固な圧密壁Ａ’を
有した杭孔Ａを地中に容易に掘孔行わしめることが出来
得るのである。しかも従来の如く、作業時における量大
な掘削土が地上に揚出するもないので排土に要する手数
も必要とすることなく、且つ通常、オーガー抜扞時に伴
う吸引作用をも完全に防止し、以て崩壊の憂いのない強
固な杭孔を確実、容易に造成出来得る等顕著な効果を有
している。As described above, in the ground drilling apparatus according to the present invention, several pressing rods 5, 5 are arranged on the screw head 1 with the auger shaft 4 as an axis, and the auger shaft 4 and Since the expansion guide plate 6 is stretched between the pressing rods 5, the pressing rods 5 and 5 are simultaneously drilled by the cutting blade 2.
5 rotates, and the excavated earth and sand is pressed against the peripheral wall of the hole by the rotating action of the pressing rods 5 and 5. Further, the expansion guide plate 6 also spreads the earth and sand that flows into the void b of each pressing rod 5 and 5. By this action, the guide sand is actively guided and expanded outward without accumulating in the void b, and the expanded earth sand competes with the pressing action by the rotation of the pressing rods 5 and 5, so that it is more reliable and firm. It is possible to easily dig a pile hole A having a consolidation wall A ′ in the ground. Moreover, unlike the conventional method, a large amount of excavated soil is not lifted to the ground during work, so there is no need for the labor required for soil removal, and the suction action normally associated with auger removal is completely prevented. Therefore, it has a remarkable effect that a strong pile hole without fear of collapse can be surely and easily formed.
【００１０】更に請求項３項記載の如く、拡開誘導板６
をオーガ回転方向に対して板面全体を湾曲形成行わしめ
ることによって各ロッド５，５間の空隙ｂ内に滞溜せる
土砂を円滑良好に周辺に拡開し、以て各ロッド５，５間
内における土砂の固結を防止すると共に回転時の抵抗を
寡小し、しかも孔内の湧水と掘削土が空隙ｂ内にて自動
的に混練し、回転時の摩擦抵抗等をより極減する等の効
果も併せ有している。Further, as described in claim 3, the expansion guide plate 6
By curving the entire plate surface with respect to the auger rotation direction, the earth and sand retained in the space b between the rods 5 and 5 can be spread smoothly and smoothly to the periphery, and thus, between the rods 5 and 5. It prevents the solidification of soil and sand and minimizes the resistance during rotation, and the spring water in the hole and the excavated soil are automatically mixed in the void b, further reducing the frictional resistance during rotation. It also has the effect of doing.
【図１】 発明者が先に発明した地盤掘孔装置の正面図
と中央横断面図、FIG. 1 is a front view and a central cross-sectional view of a ground drilling device invented earlier by the inventor;
【図２】 この発明に係る地盤掘孔装置の正面図と中央
横断面図、FIG. 2 is a front view and a central cross-sectional view of a ground drilling device according to the present invention,
【図３】 同上、他の実施態様による同上面図、FIG. 3 is the same top view according to another embodiment,
【図４】 この発明による杭孔の掘孔状体を示す説明図
である。 符号の説明 １−スクリューヘッド ４−オーガ軸 ５−圧締ロ
ッド ６−拡開誘導板FIG. 4 is an explanatory view showing a hole-shaped body of a pile hole according to the present invention. DESCRIPTION OF SYMBOLS 1-Screw head 4-Auger shaft 5-Clamping rod 6-Expansion guide plate
Claims (3)
ーヘッド１の上部に台座３を設け、該台座３にオーガ軸
４を軸に外周部に数本の圧締ロッド５，５を一定の間隔
で四角形、または三角形状に立設すると共に該オーガ軸
４と各圧締ロッド５，５間に拡開誘導板６を張設せしめ
た特殊形状の掘孔装置を杭打機にて所定の地盤上に吊設
し、しかる後に動力を駆動して上記掘孔装置を回転させ
ながら地盤に杭孔Ａを掘孔行わしめるが、該回転掘進時
に上記拡開誘導板６、６の作用にて各ロッド５，５間の
空隙ｂに流入せる土砂を外周方向に押し拡げ、かかる押
開土砂を夫々の圧締ロッド５，５の周面にて孔周壁に圧
密し、掘孔周部に強固な孔周壁を造成行わしめんとする
ことを特徴とする建設用地盤の改良工法1. A pedestal 3 is provided on an upper portion of a screw head 1 having a cutting edge 2 at the tip thereof, and the pedestal 3 has an auger shaft 4 as an axis and several pressing rods 5, 5 on the outer peripheral portion. A digging device having a special shape in which a square or triangular shape is erected at a constant interval and an expansion guide plate 6 is stretched between the auger shaft 4 and the respective compression rods 5 and 5 to a pile driver. Then, the pile hole A is drilled in the ground while driving the motive power to rotate the drilling device and then digging the pile hole A in the ground. By the action, the earth and sand which flow into the gap b between the rods 5 and 5 is spread outwardly, and the pressed and opened earth and sand are compacted by the peripheral surfaces of the respective compression rods 5 and 5 to the hole peripheral wall, Improvement method of construction ground characterized by forming a strong hole peripheral wall in the section
るスクリューヘッド１の上部に台座３を設け、該台座３
にオーガ軸４を軸として外周部に数本の圧締ロッド５，
５を一定の間隔で四角形、または三角形状等に立設する
と共に上記オーガ軸４と各ロッド５、５間に拡開誘導板
６を一体的に張設せしめたことを特徴とする建設用地盤
の掘孔装置。2. A pedestal 3 is provided on an upper portion of a screw head 1 having a cutting edge 2 of an appropriate shape at its tip, and the pedestal 3 is provided.
With several auger shafts 4 as the axis,
Construction ground characterized by vertically arranging 5 in a quadrangular or triangular shape at regular intervals and integrally expanding an expansion guide plate 6 between the auger shaft 4 and each rod 5, 5. Drilling equipment.
るスクリューヘッド１の上部に台座３を設け、該台座３
にオーガ軸４を軸として数本の圧締ロッド５，５を一定
の間隔毎に立設すると共に上記各圧締ロッド５，５間に
回転方向に対して板面全体を湾曲形成した拡開誘導板６
を張設せしめたことを特徴とする請求項２項記載の建設
用地盤の掘孔装置。3. A pedestal 3 is provided on an upper portion of a screw head 1 having a tip blade 2 of an appropriate shape at its tip, and the pedestal 3 is provided.
A plurality of pressing rods 5 and 5 are erected at regular intervals around the auger shaft 4, and the plate surface is curved and expanded between the pressing rods 5 and 5 in the rotational direction. Guide plate 6
3. The construction ground drilling device according to claim 2, wherein the device is stretched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6337922A JP2711357B2 (en) | 1994-12-26 | 1994-12-26 | Improvement method of construction ground and its drilling equipment. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6337922A JP2711357B2 (en) | 1994-12-26 | 1994-12-26 | Improvement method of construction ground and its drilling equipment. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08177365A true JPH08177365A (en) | 1996-07-09 |
| JP2711357B2 JP2711357B2 (en) | 1998-02-10 |
Family
ID=18313267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6337922A Expired - Lifetime JP2711357B2 (en) | 1994-12-26 | 1994-12-26 | Improvement method of construction ground and its drilling equipment. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2711357B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002363965A (en) * | 2001-06-12 | 2002-12-18 | Nagashima Unyu Kiko:Kk | Method for improving soft ground and screw shaft used in the same |
| CN115178580A (en) * | 2021-04-01 | 2022-10-14 | 同济大学 | Even number axle multistage high pressure stirring liquid spray device |
| CN115341848A (en) * | 2022-08-15 | 2022-11-15 | 安徽盛风建设工程有限公司 | Pit digging device with anti-collapse effect for municipal road soft foundation construction and construction method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5692115A (en) * | 1979-12-25 | 1981-07-25 | Fujisash Co | Manufacture of calcium sulfoaluminate |
-
1994
- 1994-12-26 JP JP6337922A patent/JP2711357B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5692115A (en) * | 1979-12-25 | 1981-07-25 | Fujisash Co | Manufacture of calcium sulfoaluminate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002363965A (en) * | 2001-06-12 | 2002-12-18 | Nagashima Unyu Kiko:Kk | Method for improving soft ground and screw shaft used in the same |
| CN115178580A (en) * | 2021-04-01 | 2022-10-14 | 同济大学 | Even number axle multistage high pressure stirring liquid spray device |
| CN115178580B (en) * | 2021-04-01 | 2024-05-28 | 同济大学 | Even-axis multi-stage high-pressure stirring liquid spraying device |
| CN115341848A (en) * | 2022-08-15 | 2022-11-15 | 安徽盛风建设工程有限公司 | Pit digging device with anti-collapse effect for municipal road soft foundation construction and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2711357B2 (en) | 1998-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2154630A (en) | Construction method for foundation piling | |
| JP2673677B2 (en) | Pile method | |
| JPH08177365A (en) | Soil improvement work for construction and earth auger device therefor | |
| US4027490A (en) | Self-sinking, axial passage foundation pile and method | |
| JP4360745B2 (en) | Construction method of ready-made piles | |
| JP3015935B2 (en) | Drilling equipment for foundation ground | |
| JP2514596B2 (en) | Ground drilling equipment | |
| JPH06158971A (en) | Soil improvement device | |
| JP3182586B2 (en) | Construction method of soil cement composite pile | |
| JP3019988B2 (en) | Auger for hard ground excavation | |
| JP3035590B2 (en) | Drilling equipment for foundation ground | |
| JPH07189248A (en) | Method of pit excavation construction of foundation ground and device thereof | |
| JPH08269970A (en) | Boring device for foundation ground and method for execution of works in foundation ground | |
| JP3158145B2 (en) | Drilling equipment for foundation ground | |
| JPH02274992A (en) | Method and device for excavating pile hole | |
| JP3015865B2 (en) | Construction method and equipment for foundation ground | |
| JP2610555B2 (en) | Drilling method for foundation ground and its drilling equipment | |
| JP2582724B2 (en) | Drilling equipment for foundation ground | |
| JP3443590B2 (en) | Soil column installation device and method for installing soil column | |
| JPS6139445B2 (en) | ||
| JPH05247923A (en) | Ground improving equipment | |
| JPH11117652A (en) | Method and device for constructing foundation ground | |
| JP2518167Y2 (en) | Ground improvement equipment | |
| GB2363152A (en) | Method and apparatus for forming enlarged pile heads | |
| JPH0725032U (en) | Ground improvement device |