JPH03199521A - Discharge valve opening/closing mechanism in ground betterment device - Google Patents
Discharge valve opening/closing mechanism in ground betterment deviceInfo
- Publication number
- JPH03199521A JPH03199521A JP34357089A JP34357089A JPH03199521A JP H03199521 A JPH03199521 A JP H03199521A JP 34357089 A JP34357089 A JP 34357089A JP 34357089 A JP34357089 A JP 34357089A JP H03199521 A JPH03199521 A JP H03199521A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- ground
- valve body
- valve
- circumferential surface
- 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
- 230000007246 mechanism Effects 0.000 title claims description 6
- 230000006872 improvement Effects 0.000 claims description 22
- 239000000843 powder Substances 0.000 abstract description 29
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 26
- 238000003756 stirring Methods 0.000 description 26
- 239000002689 soil Substances 0.000 description 23
- 238000009412 basement excavation Methods 0.000 description 11
- 239000004576 sand Substances 0.000 description 10
- 239000004568 cement Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000004570 mortar (masonry) Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 235000016068 Berberis vulgaris Nutrition 0.000 description 2
- 241000335053 Beta vulgaris Species 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
（イ） 産業上の利用分野
この発明は、地盤改良装置における吐出弁開閉機構に関
する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a discharge valve opening/closing mechanism in a soil improvement device.
（ロ） 従来の技術
従来、軟弱地盤を改良する方法として、同地盤に穿設し
た掘削孔中の掘削上にモルタル等の硬化材を注入撹拌し
て、この混線物の硬化により地盤強度を高めるという工
法があった。(b) Conventional technology Conventionally, as a method of improving soft ground, a hardening material such as mortar is injected and stirred into the excavated hole in the same ground, and this hardening of the mixed material increases the strength of the ground. There was a method called.
また、軟弱地盤を改良するために回転軸の下端に掘削刃
体と撹拌翼を連設し、同刃体による掘削孔中にて、掘削
土と、別途に注入したモルタル等の硬化剤によって軟弱
地盤の改良を行う地盤改良装置があった。In addition, in order to improve soft ground, a digging blade and stirring blade are connected to the lower end of the rotating shaft. There was a ground improvement device that improved the ground.
（ハ） 発明が解決しようとする問題点しかしながら、
改良を要する地盤は、地質的には堆積層の場合が多く、
かかる堆積層は微細粒のシルト層、又はビート層、ある
いは、種々の土質で互層状に構成されている場合が多く
、例えば、細粒状の砂層と、微細粒のシルト層との互層
で構成された地層に対して、セメント系の硬化材を用い
て地盤改良を行った場合、シルト層の部分で硬化の結果
が、砂層の部分よりも極端に劣るため、充分な地盤強度
を得ることができず、そのため、同強度上のバラツキが
派生するという欠点があった。この欠点を角イ消するた
めに硬化材を過剰に混入することが行われているが、こ
れては、充分な地盤強度及びバラツキを小さくすること
はできず、また、ビート層に対しては、硬化の効果を得
るのに困難であった。(c) Problems that the invention seeks to solveHowever,
Geologically, the ground that requires improvement is often a sedimentary layer;
Such sedimentary layers are often composed of fine-grained silt layers, beet layers, or alternating layers of various soil types; for example, they are composed of alternating layers of fine-grained sand layers and fine-grained silt layers. If a cement-based hardening material is used to improve the ground on a soil layer that has been hardened, the hardening results in the silt layer will be extremely inferior to those in the sand layer, making it impossible to obtain sufficient ground strength. Therefore, there was a drawback that variations in strength were derived. In order to eliminate this drawback, hardening materials are mixed in excessively, but this method cannot achieve sufficient ground strength and reduce variations, and it is difficult for the beet layer to , it was difficult to obtain the effect of curing.
また、かかる地盤に前以ってセメントと砂とを水で混練
したモルタルを注入して撹社すると、モルタルが流動性
及び分散性が悪いために、掘削土組織の空隙にモルタル
が浸入して混合が完了するまでにｌＩ！ｉ間がかかり、
そのため、混合撹拌途中の混合物の体積が増加して同混
合物が地表に溢れ出し圧密の効果が威少して地盤改良の
効果が充分でなく、更にこの溢れ出した掘削土を捨土す
るために運搬しなければならず余分な作業が発生し、ま
た、モルタルの注入を停止すると注入装置内で砂とセメ
ント分とが分離して、爾後の作業に支障を来たすという
欠点があった。Furthermore, if a mortar made by mixing cement and sand with water is injected into such ground in advance and stirred, the mortar will seep into the voids in the excavated soil structure due to the poor fluidity and dispersibility of the mortar. lI! until the mixing is complete! It takes a long time,
As a result, the volume of the mixture increases during mixing and stirring, and the mixture overflows to the ground surface, impairing the consolidation effect and making the soil improvement less effective.Furthermore, the overflowing excavated soil is transported to be disposed of. In addition, when pouring mortar is stopped, sand and cement separate in the pouring device, causing problems in subsequent work.
この欠点を解決するために、先ず掘削上に分散性がよい
砂などの粒粉体を混入して土質を改善しておき、次いで
セメントミルク等の硬化材を混入することが考えられ、
掘削土の抵抗を利用して撹拌回転中の回転軸下端部に設
けた粒粉体及び硬化材吐出弁の開閉を行わせる機構が考
案されたが、掘削土抵抗が不安定であるため弁体切換え
が確実に行われ゛ず、その為に地盤改良工事の信頼性が
低くなるという欠点があった。In order to solve this drawback, it is possible to first improve the soil quality by mixing granular powder such as sand with good dispersibility on the excavation, and then mix in a hardening agent such as cement milk.
A mechanism was devised to use the resistance of the excavated soil to open and close the granular powder and hardening material discharge valve installed at the lower end of the rotating shaft during stirring rotation, but the resistance of the excavated soil was unstable, so the valve body There was a drawback that the switching was not performed reliably, which lowered the reliability of the ground improvement work.
（ニ） 問題点を解決するための手段
この発明では、それぞれ管状の外軸と内軸とで二重軸に
構成した回転軸の下端部に、開閉自在の弁体を設けると
共に、内外軸の間に内外軸のいずれか一方と螺合し、他
方とは軸方向移動のみ許容されて、内外軸の相対回動に
より軸方向に移動可能の螺動体を介設し、内外軸の相対
回動方向の変更による螺動体の軸方向移動により、弁体
を開閉すべく構成してなる地盤改良装置における吐出弁
開閉機構を提供せんとするものである。(d) Means for solving the problem In this invention, a valve body that can be opened and closed is provided at the lower end of the rotating shaft, which is configured as a double shaft with a tubular outer shaft and an inner shaft. A threaded body is interposed between the inner and outer shafts, which is screwed together with one of the inner and outer shafts, allows only axial movement with the other, and is movable in the axial direction due to the relative rotation of the inner and outer shafts. It is an object of the present invention to provide a discharge valve opening/closing mechanism in a ground improvement device configured to open and close a valve body by axial movement of a screw body due to a change in direction.
（ホ） 作用・効果
この発明によれば、外軸と内軸の相対回動の変更によっ
て、内外軸間に介設した螺合体を上下動させることがで
き、この上下動を弁体に伝達して同弁体を開閉させるこ
とができる。(e) Function/Effect According to this invention, by changing the relative rotation of the outer shaft and the inner shaft, the threaded body interposed between the inner and outer shafts can be moved up and down, and this up and down movement is transmitted to the valve body. The valve body can be opened and closed by opening and closing the valve body.
また、上記の内外軸の一方向の相対回動が継続しても、
螺動体に形成した螺旋の終端において螺合状態が離脱す
るようにすれば、上記内外軸の一方向の相対回動を継続
させることができ、弁体は開又は閉の状態を保持するこ
とができる。Furthermore, even if the above-mentioned relative rotation of the inner and outer axes in one direction continues,
If the screwed state is released at the end of the spiral formed in the screw body, the relative rotation of the inner and outer shafts in one direction can be continued, and the valve body can be maintained in the open or closed state. can.
かかる構成によって、内外軸相対回動方向の正逆の二状
態と、弁体開閉の二状態とを対応させることが可能であ
り、回転軸の弁体の開閉を内外軸相対同動方向の正逆切
換によって操作することができ、粒粉体と硬化材とを順
次個別に掘削上に混入するという前記の考えを実現する
ことができる。With this configuration, it is possible to make the two states of forward and reverse relative rotation directions of the inner and outer shafts correspond to the two states of opening and closing of the valve body. It can be operated by reverse switching, making it possible to realize the above-mentioned idea of mixing powder and hardening material sequentially and separately onto the excavation.
そして内軸の内部をセメントと水とを混合したセメント
ミルク等の硬化材の通路とし、内軸と外軸との間隙を砂
等の粒粉体の通路として、回転軸下端の弁体の開閉切換
を内外軸相対回転の正逆切換によって行い、例えば、上
記相対回転が正の場合は内軸と外軸間の粒粉体を同軸の
外部に吐出し、逆の場合は内軸中のセメントミルクを同
軸の外部に吐出させるようにすることができる。The inside of the inner shaft is used as a passage for hardening material such as cement milk mixed with cement and water, and the gap between the inner and outer shafts is used as a passage for granular powder such as sand, and the valve body at the lower end of the rotating shaft is opened and closed. Switching is performed by forward/reverse switching of the relative rotation of the inner and outer shafts. For example, when the above relative rotation is positive, the granules between the inner and outer shafts are discharged to the outside of the same shaft, and when it is reversed, the cement in the inner shaft is discharged. Milk can be discharged coaxially to the outside.
従って、まず、回転軸を正回転させて、掘削孔中の掘削
上に粒粉体のみ混入混練し、次いで、回転軸を逆回転さ
せて、硬化材を混入混練することで、硬化材の混入撹拌
に先立って土質を改良し、また掘削土の組織中への粒粉
体の分散が速やかに行われて混合撹拌の混合物の体積増
加を抑止するので、掘削土の地表への溢れ出しが抑制さ
れて捨上作業が不要となると共に、圧密効果が充分に高
くなる。Therefore, first, the rotary shaft is rotated in the forward direction to mix and knead only the granular powder on the excavation in the borehole, and then the rotary shaft is rotated in the reverse direction to mix and knead the hardening material. The soil quality is improved prior to stirring, and the granular powder is quickly dispersed into the structure of the excavated soil, suppressing the volume increase of the mixture during mixing and agitation, thereby suppressing the overflow of excavated soil to the surface. This eliminates the need for dumping work and provides a sufficiently high consolidation effect.
このように前以って土質の改良を行った掘削上に硬化材
の混練が均一に行われることになり、地盤改良結果のバ
ラツキも解泪される。In this way, the hardening material is uniformly kneaded on the excavation where the soil quality has been improved in advance, and the dispersion in the ground improvement results is also eliminated.
なお、前記したように、前以ってセメントと砂とを水で
混練したモルタルは、流動性及び分散性が悪く、混合に
時間がかかるものであるが、粒粉体の単体は、粘着性が
なく、またモルタルに比べて流動性及び分散性がよいこ
とから、掘削土中への侵入つまり混合が円滑かつ短時間
で行われるものである。As mentioned above, mortar made by mixing cement and sand with water has poor fluidity and dispersibility, and takes time to mix. Since it does not have any dirt and has better fluidity and dispersibility than mortar, it penetrates into the excavated soil, that is, mixes it smoothly and in a short time.
特に、弁体の開閉作動に、掘削上の抵抗を利用せず、内
外軸の相対回転の方向の変更によって行わせるようにし
たので、弁体の開閉作動が確実になり信頼性の高い地盤
改良工事を行うことができる。In particular, the valve body is opened and closed by changing the direction of relative rotation between the inner and outer shafts without using the resistance during excavation, which ensures reliable opening and closing of the valve body, resulting in highly reliable ground improvement. Construction work can be carried out.
（へ） 実施例
本発明の実施例を図面にもとづき詳説すれば、第１図に
おいて、（＾）は地盤改良装置を示し、同装置（＾）は
移動「１在のベースマシン（１〉、硬化材供給装置（２
）により構成されており、ベースマシン（１）はリーダ
ー（３）により回転軸（４）を垂直に支持し、リーダー
（３）と回転軸（４〉との間に介設したモーター（５）
により回転軸（４〉と、同軸（４〉−ド端に連設した掘
削刃体（６）及び撹袢ｒＡ（７）を回転させつつリーダ
ー（８）に沿って同軸り４）を降下せしめて、地盤（Ｇ
）に垂直な掘削孔（Ｉ］）を穿設するように構成してい
る。Embodiment The embodiment of the present invention will be explained in detail based on the drawings. In FIG. Hardening material supply device (2
), the base machine (1) vertically supports a rotating shaft (4) by a leader (3), and a motor (5) interposed between the leader (3) and the rotating shaft (4).
The coaxial rod 4 is lowered along the leader (8) while rotating the rotary shaft (4>), the excavating blade body (6) and the stirring rA (7) connected to the end of the coaxial (4>). The ground (G
) is configured to drill a perpendicular drilling hole (I]).
回転軸（４〉は第２図で示すように、二重軸、すなわち
中空管状の外軸（９）と、同外軸（９）の内部を挿通し
た内軸（ｌＯ）により構成されており、回転軸（４）の
上端とモーター（５）との間に介設した二重反転歯車機
構（１１）によって内外軸（１０）（９）が相互に反対
方向に回転するように構成されており、内軸（ｌＯ）は
外軸（９）よりも更に下方に延出して、同内軸（ｌＯ）
下端には掘削刃体（６）が連設されている。As shown in Fig. 2, the rotating shaft (4) is composed of a double shaft, that is, a hollow tubular outer shaft (9) and an inner shaft (lO) inserted through the inside of the outer shaft (9). , the inner and outer shafts (10) and (9) are configured to rotate in mutually opposite directions by a counter-rotating gear mechanism (11) interposed between the upper end of the rotating shaft (4) and the motor (5). The inner axis (lO) extends further downward than the outer axis (9), and the inner axis (lO)
A digging blade body (6) is connected to the lower end.
掘削刃体（６〉の上方には、撹拌翼（７）が配設されて
おり、撹拌翼（７）は大・中・小撹拌翼体（７ａ）（７
ｂ） （７ｃ）にて構成されており、各翼体（７ａ）
（７ｂ）（７Ｃ）は側面から見て略台形枠状に形成され
、回転軸（４）を中心として、それぞれ放射状に所定個
数配設されている。A stirring blade (7) is arranged above the excavating blade body (6>), and the stirring blade (7) is connected to large, medium and small stirring blades (7a) (7).
b) Consists of (7c), each wing body (7a)
(7b) and (7C) are formed in a substantially trapezoidal frame shape when viewed from the side, and are each arranged in a predetermined number radially around the rotating shaft (4).
小撹拌翼体く７Ｃ）は、同翼体（７Ｃ）の上下端が外軸
（９）の下端部に固着されており、中成ＦＰ’１１体（
７ｂ）は重視ｎ翼体（７Ｃ）よりも大なる略台形枠状に
形成され、小撹拌翼体（７Ｃ〉の外側を囲繞した状態で
配設されており、小撹拌翼体（７ｂ）の下端は内軸（ｌ
Ｏ）の下端に固着され、同上端は小撹拌翼体（７ｃ）上
端の固着位置の上方にて外軸（９〉に軸支されており、
大撹ｉＰｇ体（７ａ）は小撹拌翼体（７ｂ）の外側を囲
繞して、その上端を外軸（９）に固着させ、同下端を内
軸（１０）にて軸支している。The upper and lower ends of the small stirring blade (7C) are fixed to the lower end of the outer shaft (9), and the intermediate FP'11 body (
7b) is formed into a substantially trapezoidal frame shape that is larger than the important n blade (7C), and is arranged so as to surround the outside of the small stirring blade (7C). The lower end is the inner axis (l
The upper end of the small stirring blade (7c) is fixed to the lower end of the small stirring blade (7c) and supported by the outer shaft (9>) above the fixed position of the upper end of the small stirring blade (7c).
The large stirring iPg body (7a) surrounds the outside of the small stirring blade body (7b), its upper end is fixed to the outer shaft (9), and its lower end is pivotally supported by the inner shaft (10).
従って、小撹拌翼体（７ｂ〉は大小撹社翼体（７ａ）（
７ｃ〉の中間でこれらとは反対方向に回転することにな
る。Therefore, the small stirring blade (7b) is replaced by the large and small stirring blade (7a) (
7c>, it will rotate in the opposite direction.
また、回転＄１１１（４）の上部には、第２図で示す粒
粉体供給装置（Ｂ）が設けられており、同装置（Ｂ）は
、外軸（９）の上端に、中空管状の外軸（９）の内部と
連通したホッパー（１４）を設けており、ホッパー （
＋４）下方の内軸（１０）の外周面には、スクリュー（
１５）を連設し、同スクリュー（１５）の下端部に臨む
外軸（９）の内周面に略漏斗状の整形筒（＋７）の上端
縁を連設し、同整形筒（１７）下端に斜め切欠開口部（
１６）を形成している。In addition, a granular powder supply device (B) shown in FIG. A hopper (14) is provided that communicates with the inside of the outer shaft (9) of the hopper (
+4) A screw (
15), and the upper end edge of a substantially funnel-shaped shaping cylinder (+7) is connected to the inner peripheral surface of the outer shaft (9) facing the lower end of the screw (15), and the shaping cylinder (17) Diagonal notch opening (
16).
従って、後記の弁室（２７）内に落下堆積する粒粉体（
８）が、自己調圧作用により整形筒（＋７〉下端の斜め
切欠開口部（１６）の上端よりも上方へは盛上らない。Therefore, the granular powder (
8) does not rise above the upper end of the diagonal notch opening (16) at the lower end of the shaping cylinder (+7) due to the self-pressure regulating action.
更に、整形筒（１７）の下方には、吐出弁（■）が設け
られており、同吐出弁（ｖ）は、第３図及び第４図で示
すように、硬化剤吐出弁（１８）と粒粉体吐出弁（１９
〉とで構成されている。Furthermore, a discharge valve (■) is provided below the shaping cylinder (17), and the discharge valve (v) is connected to the curing agent discharge valve (18) as shown in FIGS. 3 and 4. and granular powder discharge valve (19
〉.
硬化剤吐出弁（１８〉は、内軸（１０）の下端部の内部
に略半球形状の弁体（２０）を嵌入し、同弁体（２０〉
に、内軸（１０）を直交状態で回動自在に挿通した回転
軸〈２１）を固着し、同回転軸（２１）の一端にレバー
（２２）を連設して、同レバー（２２）を後述の連結杆
（２３）に連結し、同回転軸（２１）を中心として弁体
（２０〉を回動させ、この弁体（２０）の回動により、
内軸（１０〉の側壁に開口した側方吐出口（２４）と、
内軸（ｌＯ）の下端部に設けた閉塞板（２５）に穿設し
た下方吐出口（２６）とを交互に開閉するようにしてい
る。The curing agent discharge valve (18) has a substantially hemispherical valve body (20) fitted inside the lower end of the inner shaft (10).
A rotating shaft (21), which is rotatably inserted through the inner shaft (10) at right angles, is fixed to the inner shaft (10), and a lever (22) is connected to one end of the rotating shaft (21). is connected to a connecting rod (23), which will be described later, and the valve body (20> is rotated around the rotation axis (21), and by the rotation of this valve body (20),
a side discharge port (24) opened in the side wall of the inner shaft (10);
A lower discharge port (26) formed in a closing plate (25) provided at the lower end of the inner shaft (lO) is alternately opened and closed.
また、外軸（９）の下端の下方位置において内軸（ｌＯ
）の外周面に有底略円筒状の弁室（２７）を連設して、
同弁室（２７）を前記整形筒（１７）と連通させている
。In addition, the inner shaft (lO
) is provided with a bottomed substantially cylindrical valve chamber (27) on the outer peripheral surface thereof,
The valve chamber (27) is communicated with the shaping cylinder (17).
また、弁室（２７）の外側壁り２８）を外軸（９）の外
側に所定の間隔を保持して位置させ、同外側壁（２８）
の内周面と外軸（９）の外周面との間に、螺動体（２９
）を介設している。Further, the outer wall (28) of the valve chamber (27) is positioned on the outer side of the outer shaft (9) with a predetermined distance maintained, and the outer wall (28) of the valve chamber (27) is
and the outer circumferential surface of the outer shaft (9), the screw body (29
) are interposed.
螺動体（２９）は略用筒状に形成されており、内周面に
第５図の展開図で示すような雌ネジ（３０）を形成して
おり、外軸（９）の外周面に上記雌ネジ（３０）と螺合
する雄ネジ（３１）を形成している。The screw body (29) is formed into a substantially cylindrical shape, and has a female thread (30) formed on its inner circumferential surface as shown in the exploded view in FIG. A male screw (31) is formed to be screwed into the female screw (30).
また、螺動体（２９）の外周面と弁室〈２７）の外側壁
（２８）内周面との間に略フェザ−キー状の削り止め部
材（３２）を介設して、内軸（ｌＯ〉に対し螺動体〈２
９）を回動不可であるが軸方向には摺動自在に連結して
いる。In addition, a substantially feather key-shaped scraping prevention member (32) is interposed between the outer circumferential surface of the screw body (29) and the inner circumferential surface of the outer wall (28) of the valve chamber (27). For lO〉, the spiral body〈2
9) are connected so that they cannot rotate but are slidable in the axial direction.
また、弁室（２７）の外側壁（２８）の下部に粒粉体を
外ｍＳに吐出するための粒粉体吐出口（３３）を穿設し
ており、螺動体（２９〉が下方に移動したときは、同粒
粉体吐出口（３３）を螺動体（２９）の下部側壁で閉塞
し、螺動体（２９）が上方に移動したときは、同粒粉体
吐出口（３３〉を角１ｆ放するようにしている。In addition, a granular powder discharge port (33) for discharging granular powder to the outside mS is provided at the lower part of the outer wall (28) of the valve chamber (27), and the screw body (29>) When it moves, the same-grain powder discharge port (33) is closed by the lower side wall of the screw body (29), and when the screw body (29) moves upward, the same-grain powder discharge port (33) is closed. I try to release the corner 1f.
また、弁室（２７）の内部において、弁室外側壁（２８
〉の左右内側面の間にブリッジ（３４）を架設して、同
ブリッジ（３４）の略中央部と前記レバー（２２〉の先
端とを連結杆り３５）を介して連結し、螺動体（２９）
の軸方向移動によって弁体（２０〉を回動させ、内軸（
ｌＯ〉の側方吐出口（２４〉と、内軸（ｌＯ）の下端部
を閉塞した閉塞板（２５〉に穿設した下方吐出口（２６
）との開閉を切換えるようにしている。In addition, inside the valve chamber (27), the valve chamber outer wall (28
A bridge (34) is installed between the left and right inner surfaces of the slide body ( 29)
The valve body (20〉) is rotated by the axial movement of the inner shaft (
1O〉 side outlet (24>) and a lower outlet (26
) to switch between opening and closing.
なお、第１図中（３６）は、液状硬化材を注入するため
のホースを示し、同ホース（３６）は、硬化材供給装置
（２）中に内蔵した硬化材ポンプと連通しており、同ホ
ース（３６）先端のスイベル（３７）を介し内軸（１０
）中に液状硬化材又は水を圧入するものであり、また、
第２図中、り３８）は内軸（１０）下端に連設したノズ
ルを示す。Note that (36) in FIG. 1 indicates a hose for injecting the liquid hardening material, and the hose (36) communicates with a hardening material pump built in the hardening material supply device (2). The inner shaft (10
) into which liquid hardening material or water is pressurized, and
In FIG. 2, 38) indicates a nozzle connected to the lower end of the inner shaft (10).
第６図は、螺動体（２９）の作動を硬化剤吐出弁（１８
）の弁体（２０〉に伝達するための他の実施例を示して
おり、前記ブリッジク３４）にラック（３９〉を連設す
ると共に、回転軸（２１）にビニオン（４０）を連設し
てこれらを噛合させ、螺動体（２９）の上下動により弁
体（２０）を回動させるようにしたものである。FIG. 6 shows the operation of the screw body (29) and the curing agent discharge valve (18).
) shows another embodiment for transmitting the signal to the valve body (20>), in which a rack (39>) is connected to the bridge 34) and a binion (40) is connected to the rotating shaft (21). The valve body (20) is rotated by the vertical movement of the screw body (29).
第７図は略球形状の弁体（２０ａ）にＴ字状の流路（２
０ｂ）を穿設すると共に、回転軸（２１）に連設したレ
バー（２２）の先端をブリッジ（３４）から垂設した係
合体（３５ａ）に係合させて、螺動体（２９）の上下動
により弁体（２０ａ）を回動させるようにしたものであ
る。FIG. 7 shows a T-shaped flow path (2
0b), and the tip of the lever (22) connected to the rotating shaft (21) is engaged with the engaging body (35a) hanging down from the bridge (34) to move the screw body (29) up and down. The valve body (20a) is rotated by the movement.
この発明の実施例は上記のように摺成されており、地盤
改良作業に際し、まずモーター（５）の作動によりｌｈ
１転軸（４）を一方に回転させながら掘削刃体（６）を
降下させて、地中に略円柱形状の掘削孔（１１）を穿設
するが、この際掘削上の排出は行わず、掘削刃体（６）
と撹拌翼（７〉とが掘削土中に埋没した状態にする。The embodiment of the present invention is manufactured as described above, and when performing ground improvement work, the lh
The excavator blade (6) is lowered while rotating the rotating shaft (4) in one direction, and a substantially cylindrical excavation hole (11) is bored in the ground, but at this time, no discharge is performed on the excavation. , drilling blade (6)
and the stirring blade (7) are buried in the excavated soil.
なお、上記工程中、ホッパー（１４）に砂などの粒粉体
（８）を供給し２、弁室（２７）の粒粉体吐出口（３３
〉と内？Ｉ［Ｉ（１０）の側方吐出口（２４）とを解放
して、粒粉体（８）を弁室（２７）の外部に吐出させな
がら掘削刃体（６）と撹ｔ′Ｔ！翼（７〉を降下させ、
次いで、掘削刃体（６）と撹件ｇ（７）とを回転させな
がら地表まで引上げることで、粒粉体（８）と掘削土と
をＫｌｎする。In addition, during the above process, the granular powder (8) such as sand is supplied to the hopper (14), and the granular powder discharge port (33) of the valve chamber (27) is supplied.
〉 and inside? The side discharge port (24) of I[I (10) is released and the granular powder (8) is discharged to the outside of the valve chamber (27) while stirring with the excavation blade (6). Lower the wings (7),
Next, the granular powder (8) and the excavated soil are mixed by rotating the excavation blade (6) and the stirring element g (7) and pulling them up to the ground surface.
次いで、掘削刃体（６）と撹拌翼（７）とを地表上に位
置させた状態で、回転軸（４）の回転方向を切換えて、
弁室（２７）の粒粉体吐出口（３３）と内軸（１０）の
側方吐出口（２４）とを閉塞し、内軸（１０）の下方吐
出口（２６）を解放して、硬化剤を内軸（ｌＯ）下端部
のノズル（３８）から吐出させながら、掘削刃体（６〉
と撹拌翼（７）とを下降・上昇させて、掘削刃体（６）
と撹拌翼（７）との回転により、前記の粒粉体（８）と
掘削土との混線物と硬化剤とを混練させる。Next, with the excavation blade body (6) and stirring blade (7) positioned above the ground surface, the rotation direction of the rotation shaft (4) is switched,
The granular powder discharge port (33) of the valve chamber (27) and the side discharge port (24) of the inner shaft (10) are closed, and the lower discharge port (26) of the inner shaft (10) is opened. While discharging the hardening agent from the nozzle (38) at the lower end of the inner shaft (lO),
The excavating blade body (6) is lowered and raised by lowering and stirring blade (7).
By the rotation of the stirring blades (7), the mixture of the granular powder (8) and excavated soil and the hardening agent are kneaded.
上記のように地盤改良に際し、硬化材の注入に先立って
、掘削土中に粒粉体（８）を混入して土質を改善し、し
かるのち、硬化材を混入することで、前記の問題点を解
泪することができる。As mentioned above, when improving the ground, the granular powder (8) is mixed into the excavated soil to improve the soil quality before the hardening material is injected, and then the hardening material is mixed in to solve the above problems. can be liberated from.
なお、上記地盤改良部分は、硬化材と掘削上及び粒粉体
（８〉との混練物の養生期間を経過して効果を発するも
のであり、養生期間中に連続して相互にラップした状態
に多数の地盤改良作業を行うことにより、地盤に広範囲
に連続した地盤改良工事を行うことができ、また−列に
連続して施工することにより地盤中に土止め又は止水の
ための地中連続壁体を築造することもできる。In addition, the above-mentioned ground improvement part produces the effect after the curing period of the hardened material and the mixture of excavated material and granular powder (8>), and during the curing period, the mixture is continuously lapped with each other. By performing a large number of ground improvement works in the same period, it is possible to carry out continuous ground improvement works over a wide range of ground, and by performing continuous ground improvement works in rows, it is possible to create underground structures for earth retention or water stoppage in the ground. It is also possible to construct continuous walls.
特に改良を要する地盤に対し、掘削孔（ＩＩ）の掘削後
、硬化材注入に先立って、各地層に対し粒粉体を注入し
て混練することにより、同砂等が硬化地盤の骨材となり
圧力を負担するので強力な地盤改良を行うことができる
。For ground that particularly requires improvement, after drilling the borehole (II) and prior to injecting the hardening material, by injecting and kneading granular powder into each layer, the sand etc. will become the aggregate of the hardening ground. Since it bears the pressure, it can perform powerful ground improvement.
なお、本発明に用いる粒粉体には砂のほかに、粒状炉滓
、パーライトなどの粒状発泡体等を用いることも可能で
ある。In addition to sand, it is also possible to use granular slag, granular foam such as perlite, etc. as the granular powder used in the present invention.
また、本発明装置によれば、粒粉体だけを地層に混入撹
袢すること、また硬化材のみを混入撹袢することも、ま
た両者を併用することも可能であり、更に、粒粉体のか
わりに粉状硬化材を土中に注入することができることか
ら、スラリー状硬化材用の地盤改良装置と、粉状硬化材
用の装置の両方を兼用することができ、従来、二種の装
置を要したものが一台の本発明装置ですむことになる。Furthermore, according to the device of the present invention, it is possible to mix and stir only granular powder into the stratum, to mix and stir only hardening material, or to use both in combination. Instead, powdered hardening material can be injected into the soil, so it can be used as both a ground improvement device for slurry hardening material and a device for powdery hardening material. What used to require several devices can now be completed with a single device of the present invention.
更に、本発明装置での地盤改良に鋼材等とを組合わせる
ことにより、現地上を利用して建造物の支持杭等を造成
することができ、また、槽上の必要がなくなることから
特に都市部において捨土場所、捨土運搬の必要がなくな
り、工事のネックの一部が解消される。Furthermore, by combining ground improvement with steel materials, etc. using the device of the present invention, it is possible to use the on-site ground to create support piles for buildings. This eliminates the need for a dump site and transport of waste soil, which eliminates some of the bottlenecks in construction work.
また、粒粉体の土中への吐出口に弁を設けたことで、粒
粉体の吐出を停止しても、掘削上が装置中に逆流するこ
とが防止されているため、例えば、粉状同化材を使用し
て水底の地盤改良等を行う場合、従来装置では、装置中
に水又は泥土の侵入を防止するために、装置を掘削孔（
１１）から抜去する際も同装置内に圧力をかけておく必
要があり、そのため装置を抜去したときに上記圧力で噴
出した流体により折角改良した地盤の頭部が破壊される
という欠点があったが、本発明装置では、圧力をかけず
とも水及び泥土の侵入が防止されるので、流体噴出によ
る同頭部の破壊がなく、確実な水底地盤の改良が行われ
るという利点がある。In addition, by installing a valve at the outlet for discharging granular powder into the soil, even if the granular powder discharge is stopped, excavated material is prevented from flowing back into the equipment. When using assimilated materials to improve the ground at the bottom of a water body, conventional equipment requires the equipment to be installed in an excavated hole (
11) It was necessary to keep pressure inside the device when removing it from the ground, which had the disadvantage that when the device was removed, the head of the ground that had been painstakingly improved was destroyed by the fluid ejected under the above pressure. However, with the device of the present invention, the intrusion of water and mud is prevented without applying pressure, so there is no destruction of the head due to fluid jetting, and there is an advantage that the bottom ground can be reliably improved.
上記のように、本発明によれば、改良地盤の強度を高め
ると共に、同地盤改良の適用範囲を含水比が特に高いシ
ルト層、又は空隙率が特に高いピート層等の超柔軟地盤
にまで適用範囲を拡大するという効果がある。As described above, according to the present invention, the strength of the improved ground is increased, and the scope of the ground improvement is also applied to ultra-soft ground such as silt layers with a particularly high moisture content or peat layers with a particularly high porosity. This has the effect of expanding the range.
特に、弁体（２０）の開閉作動に、掘削上の抵抗を利用
せず、内外軸（１０） （９）の相対回転の方向変更に
よって行わせるようにしたので、同弁体（２０）の開閉
切換が確実であり、かつ、掘削刃体（６）と撹拌翼（７
）とを地表上に位置させて、回転軸（４）の同転方向を
切換えるようにすれば、粒粉体吐出口り３３）の開閉作
動を視認しながら行うことができ、粒粉体（８）と硬化
剤の吐出・停止を確認しながら各工程を遂行することが
できることから、信頼性が高い地盤改良工事を行うこと
ができる。In particular, the valve body (20) is opened and closed by changing the direction of relative rotation of the inner and outer shafts (10) and (9) without using resistance during excavation. The opening/closing switching is reliable, and the excavating blade body (6) and stirring blade (7)
) on the ground surface and switch the direction of rotation of the rotating shaft (4), the opening and closing operation of the granular powder discharge port 33) can be performed while visually checking the granular powder ( 8) Since each process can be carried out while checking the discharge and stop of the hardening agent, highly reliable ground improvement work can be carried out.
（Ａ） （４） （６） （９） （１０） （２０） （２９） 地盤改良装置 回転軸 掘削刃体 外軸 内軸 弁体 螺動体(A) (4) (6) (9) (10) (20) (29) Ground improvement equipment Axis of rotation drilling blade body outer shaft inner shaft valve body Spiral body
第１図は本発明による地盤改良装置の全体側面図、第２
図は回転軸及び吐出弁の縦断面図、第３図は吐出弁の拡
大縦断面図、第４図は第３図Ｘ−■線による断面図、第
５図は雄ネジ及び雌ネジの展開図、第６図、第７図は硬
化剤吐出弁の他の実施例を示す断面図。Figure 1 is an overall side view of the soil improvement device according to the present invention, Figure 2
The figure is a vertical cross-sectional view of the rotating shaft and the discharge valve, Figure 3 is an enlarged vertical cross-sectional view of the discharge valve, Figure 4 is a cross-sectional view taken along the line X-■ in Figure 3, and Figure 5 is the development of the male and female threads. 6 and 7 are cross-sectional views showing other embodiments of the curing agent discharge valve.
Claims (1)
転軸の下端部に、開閉自在の弁体を設けると共に、内外
軸の間に内外軸のいずれか一方と螺合し、他方とは軸方
向移動のみ許容されて、内外軸の相対回動により軸方向
に移動可能の螺動体を介設し、内外軸の相対回動方向の
変更による螺動体の軸方向移動により、弁体を開閉すべ
く構成してなる地盤改良装置における吐出弁開閉機構。1) A valve body that can be opened and closed is provided at the lower end of each rotary shaft configured as a double shaft with a tubular outer shaft and an inner shaft, and a valve body that can be opened and closed is screwed between the inner and outer shafts, A screw body that is only allowed to move in the axial direction with respect to the other shaft is provided, and can be moved in the axial direction by relative rotation of the inner and outer shafts.The valve can be moved in the axial direction by changing the relative rotation direction of the inner and outer shafts. A discharge valve opening/closing mechanism in a ground improvement device configured to open and close a body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34357089A JP2798761B2 (en) | 1989-12-27 | 1989-12-27 | Discharge valve opening and closing mechanism in ground improvement equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34357089A JP2798761B2 (en) | 1989-12-27 | 1989-12-27 | Discharge valve opening and closing mechanism in ground improvement equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03199521A true JPH03199521A (en) | 1991-08-30 |
| JP2798761B2 JP2798761B2 (en) | 1998-09-17 |
Family
ID=18362548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34357089A Expired - Fee Related JP2798761B2 (en) | 1989-12-27 | 1989-12-27 | Discharge valve opening and closing mechanism in ground improvement equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2798761B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0561225U (en) * | 1992-01-20 | 1993-08-13 | 西日本鉄道株式会社 | Excavation shaft structure of ground improvement device |
| JP2009526930A (en) * | 2006-02-13 | 2009-07-23 | ガンサー、ジョハン、エム． | Field pile with consistent properties from top to bottom and minimal voids |
| JP2022112683A (en) * | 2021-01-22 | 2022-08-03 | 株式会社不動テトラ | Ground improvement device |
| CN116335209A (en) * | 2023-02-15 | 2023-06-27 | 创辉达设计股份有限公司 | Foundation settlement equipment based on determination and repair of expressway and determination and repair method |
-
1989
- 1989-12-27 JP JP34357089A patent/JP2798761B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0561225U (en) * | 1992-01-20 | 1993-08-13 | 西日本鉄道株式会社 | Excavation shaft structure of ground improvement device |
| JP2009526930A (en) * | 2006-02-13 | 2009-07-23 | ガンサー、ジョハン、エム． | Field pile with consistent properties from top to bottom and minimal voids |
| JP4769878B2 (en) * | 2006-02-13 | 2011-09-07 | ガンサー、ジョハン、エム． | Field pile with consistent properties from top to bottom and minimal voids |
| JP2022112683A (en) * | 2021-01-22 | 2022-08-03 | 株式会社不動テトラ | Ground improvement device |
| CN116335209A (en) * | 2023-02-15 | 2023-06-27 | 创辉达设计股份有限公司 | Foundation settlement equipment based on determination and repair of expressway and determination and repair method |
| CN116335209B (en) * | 2023-02-15 | 2023-10-13 | 创辉达设计股份有限公司 | Foundation settlement equipment based on determination and repair of expressway and determination and repair method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2798761B2 (en) | 1998-09-17 |
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