JPH0710036U - Drilling rod for soil cement composite pile construction - Google Patents
Drilling rod for soil cement composite pile constructionInfo
- Publication number
- JPH0710036U JPH0710036U JP4451593U JP4451593U JPH0710036U JP H0710036 U JPH0710036 U JP H0710036U JP 4451593 U JP4451593 U JP 4451593U JP 4451593 U JP4451593 U JP 4451593U JP H0710036 U JPH0710036 U JP H0710036U
- Authority
- JP
- Japan
- Prior art keywords
- rod
- soil cement
- auger
- blade
- cement composite
- 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
- 239000002689 soil Substances 0.000 title claims abstract description 66
- 239000004568 cement Substances 0.000 title claims abstract description 63
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 title claims description 30
- 238000005553 drilling Methods 0.000 title claims description 10
- 238000003756 stirring Methods 0.000 claims abstract description 39
- 239000003381 stabilizer Substances 0.000 claims abstract description 20
- 238000009412 basement excavation Methods 0.000 claims description 50
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000013019 agitation Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000008267 milk Substances 0.000 description 4
- 210000004080 milk Anatomy 0.000 description 4
- 235000013336 milk Nutrition 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
(57)【要約】
【目的】 ソイルセメント合成柱を施工する際に沈設し
つつある中空管の上部を経て中空管駆動用キャップの排
出孔からソイルセメントが勢いよく飛散しないようにす
る。
【構成】 中空管３１，１内に挿通されたオーガロッド
３２，２の途中に設けられたスタビライザ１４の近接し
た位置に攪拌棒５１，５２，５３を設ける。
(57) [Summary] [Purpose] To prevent soil cement from vigorously scattering from the discharge hole of the hollow tube drive cap through the upper part of the hollow tube that is being sunk when constructing a soil cement composite column. [Structure] Stirring rods 51, 52, 53 are provided at positions close to a stabilizer 14 provided in the middle of auger rods 32, 2 inserted in hollow tubes 31, 1.
Description
【０００１】[0001]
本考案は、建設関係の基礎工事に適用されるソイルセメント合成杭の造成装置 に係り、特にそれに使用される掘削ロッドに関するものである。 The present invention relates to a soil cement composite pile construction apparatus applied to foundation work related to construction, and more particularly to a drilling rod used for the construction apparatus.
【０００２】[0002]
従来、ソイルセメント合成杭を造成するのにソイルセメント合成杭施工用掘削 ロッドが提案されている。このソイルセメント合成杭施工用掘削ロッドは、図３ に示す様に中空管３１内のオーガロッド３２の下部に連結されたオーガ支軸３３ に可動刃支持部材３５が固定され、その可動刃支持部材３５にオーガ可動刃３４ の基端部が枢軸３６により枢着され、オーガ可動刃３４の先端側が中空管３１の 外面を越えて突出しているオーガ可動刃拡開状態（水平位置状態）で、掘削攪拌 終了後に切断されるオーガ可動刃固定用シャーピン３７が、オーガ可動刃支持部 材３５とオーガ可動刃３４とにわたって挿通され、オーガヘッド４０を構成して いるものである。尚、同図中３８はセメントミルク等の固化材の吐出口、３９は オーガ支軸３３の先端部に設けられたスクリューヘッドである。 In the past, excavating rods for soil cement composite pile construction have been proposed for constructing soil cement composite piles. In this soil cement composite pile construction drilling rod, as shown in FIG. 3, a movable blade supporting member 35 is fixed to an auger support shaft 33 connected to a lower portion of an auger rod 32 in a hollow pipe 31, and the movable blade supporting member 35 is supported. In the state where the auger movable blade is expanded (horizontal position), the base end portion of the auger movable blade 34 is pivotally attached to the member 35 by the pivot 36, and the tip side of the auger movable blade 34 projects beyond the outer surface of the hollow tube 31. An auger movable blade fixing shear pin 37 that is cut after the completion of excavation and stirring is inserted between the auger movable blade support member 35 and the auger movable blade 34 to form an auger head 40. In the figure, 38 is a discharge port for solidifying material such as cement milk, and 39 is a screw head provided at the tip of the auger support shaft 33.
【０００３】 このソイルセメント合成杭施工用掘削ロッドによれば、掘削攪拌中は、オーガ 可動刃３４が拡開状態で可動刃支持部材３５に対しシャーピン３７により固定さ れ、かつ掘削攪拌終了後は、図４に示す様にシャーピン３７を切断することによ りオーガ可動刃３４を縮閉させ、中空管３１を通ってオーガヘッド４０を地上で 回収できるので、中空管３１の外径より大きく且つ一定の外径のソイルセメント 柱４１を確実に造成できるばかりでなく、中空管３１をソイルセメント柱を造成 しながら精度よくソイルセメント柱内に埋設することができるものである。 図において、１４はスタビライザでオーガロッド３２の途中に回転自在に遊嵌 される。このスタビライザ１４は、外径が中空管３１の内側に摺接するよう設定 され、掘削中の中空管３１の芯ずれを防止すると共にオーガロッド３２の屈曲を 防止するものである。また遊嵌することにより施工時の中空管３１とオーガロッ ド３２の噛み合いを防止し、掘削終了時の引揚げを容易にするものである。According to this drill rod for soil cement composite pile construction, during excavation stirring, the auger movable blade 34 is fixed to the movable blade support member 35 by the shear pin 37 in an expanded state, and after excavation stirring is completed. As shown in FIG. 4, the auger movable blade 34 can be contracted and closed by cutting the shear pin 37, and the auger head 40 can be recovered on the ground through the hollow tube 31. Not only the soil cement column 41 having a large and constant outer diameter can be reliably formed, but also the hollow tube 31 can be accurately embedded in the soil cement column while forming the soil cement column. In the figure, numeral 14 is a stabilizer which is rotatably loosely fitted in the middle of the auger rod 32. The stabilizer 14 is set so that the outer diameter thereof is slidably contacted with the inside of the hollow tube 31, and prevents the hollow tube 31 from being misaligned during excavation and also prevents the auger rod 32 from bending. The loose fitting prevents the hollow pipe 31 and the auger rod 32 from meshing with each other at the time of construction and facilitates lifting at the end of excavation.
【０００４】 しかし、前記ソイルセメント合成杭施工用掘削ロッドは、全てのオーガ可動刃 ３４が同方向に回転し掘削攪拌をするものであるため、地盤が粘性土の場合は共 廻りして大きな土塊ができ攪拌混合状態が悪く成り、ソイルセメント柱の強度が 不充分となる不都合がある。However, in the excavating rod for soil cement composite pile construction, all the auger movable blades 34 rotate in the same direction for excavating and stirring. Therefore, when the ground is cohesive soil, it rotates together to form a large clod. However, there is a disadvantage that the stirring and mixing state becomes poor and the strength of the soil cement column becomes insufficient.
【０００５】 そこで、図５に示す様にオーガ支軸３３に、可動刃支持部材３５の上下方向に 隣り合う位置において支持部材３５Ａが回転自在に取付けられ、その支持部材３ ５Ａに共廻り防止翼３４Ａの基端部が枢軸３６Ａにより枢着され、共廻り防止翼 ３４Ａの先端がオーガ可動刃３４の先端を越えて横方向に突出している状態で、 掘削攪拌終了後に切断される共廻り防止翼固定用シャーピン３７Ａが、支持部材 ３５Ａと共廻り防止翼３４Ａの基端部とにわたって挿通されているソイルセメン ト合成杭施工用掘削ロッドが提案された。このソイルセメント合成杭施工用掘削 ロッドによれば、共廻り防止翼３４Ａが地盤により回転を拘束されるため土の共 廻りは防止できるものである。Therefore, as shown in FIG. 5, a support member 35A is rotatably attached to the auger support shaft 33 at a position adjacent to the movable blade support member 35 in the vertical direction, and the support member 35A has a non-rotating blade. A proximal end portion of 34A is pivotally attached by a pivot shaft 36A, and a co-rotation preventing blade 34A is cut after the end of excavation stirring, with the tip of the co-rotation preventing blade 34A protruding laterally beyond the tip of the auger movable blade 34 A drilling rod for soil cement synthetic pile construction has been proposed in which the fixing shear pin 37A is inserted through the support member 35A and the base end portion of the co-rotation preventing blade 34A. According to this excavating rod for soil cement composite pile construction, the co-rotation preventive wing 34A is constrained from rotating by the ground, so that co-rotation of soil can be prevented.
【０００６】 しかしながら、前記従来のソイルセメント施工用掘削ロッドの攪拌補助翼３４ Ａは、削孔径より径大のため地盤中に喰い込み静止状態となり、共廻りを防止す るだけであるので、粘性土の細断及び攪拌混合も十分でない不都合があるし、ま た、可動刃３４は全て同径であるため掘削負荷が大きく、掘削時間がかかったり 、使用電力が高い、等の不都合があったので、図６に示すようなソイルセメント 合成杭施工用掘削ロッドが提案された。However, since the stirring auxiliary blade 34A of the conventional drill rod for soil cement construction has a diameter larger than the drilling diameter, the stirring auxiliary blade 34A bites into the ground to be in a stationary state and only prevents co-rotation. There was the inconvenience that the soil was not shredded and mixed well, and the movable blades 34 all had the same diameter, so the excavation load was large, the excavation time was long, and the power consumption was high. Therefore, a drilling rod for soil cement composite pile construction as shown in Fig. 6 was proposed.
【０００７】 図６はソイルセメント合成杭施工用掘削ロッドの正面図で、垂直な鋼管杭，コ ンクリート杭等の中空管１の中心部に配置されたオーガロッド２の下部には、先 端（下端）側より上方に所定間隔をおいて、先行掘削翼３，掘削翼４，逆転掘削 翼５及び攪拌翼９が設けられると供に、掘削翼４付近のオーガロッド２にはセメ ントミルク等の固化材の噴出口１０が設けられオーガヘッド２０が構成される。 固化材の噴出口１０は、先行掘削翼３付近のオーガロッド２に設けてもよい。そ うすると固化材を掘削範囲全域に噴出でき、全長にわたり均一なソイルセメント 柱を形成できる。噴出口を２つ設けた場合は一方を盲にして、１つのみの噴出口 を使用することも可能である。FIG. 6 is a front view of a drilling rod for soil cement composite pile construction, in which the tip of the auger rod 2 arranged at the center of the hollow pipe 1 such as a vertical steel pipe pile or concrete pile is provided at the lower end. The preceding excavation blade 3, the excavation blade 4, the reverse excavation blade 5 and the stirring blade 9 are provided at a predetermined interval above the (lower end) side, and the auger rod 2 near the excavation blade 4 is provided with cement milk or the like. An auger head 20 is configured by providing the solidified material ejection port 10. The solidified material ejection port 10 may be provided in the auger rod 2 near the preceding excavation blade 3. As a result, the solidified material can be ejected over the entire excavation area and uniform soil cement columns can be formed over the entire length. When two jets are provided, one can be made blind and only one jet can be used.
【０００８】 前記中空管１の下端外周縁には、図７に示す様に伝動部材１１が突設される。 この伝動部材１１は、前記逆転掘削翼５と係合し、中空管１の回転を逆転掘削翼 ５に伝動し逆転掘削翼５を回動させるものである。A transmission member 11 is provided on the outer peripheral edge of the lower end of the hollow tube 1 as shown in FIG. This transmission member 11 engages with the reverse excavation blade 5 and transmits the rotation of the hollow tube 1 to the reverse excavation blade 5 to rotate the reverse excavation blade 5.
【０００９】 前記先行掘削翼３は、その掘削径が掘削翼４の掘削径よりも小さく構成される 。例えば、掘削翼４の掘削径１０００ｍｍに対し先行掘削翼３の掘削径を５００ ｍｍに設定する如くである。この先行掘削翼３の取付けは、水平方向であればよ く、掘削翼４と平行方向でも直交方向でも任意である。また、前記掘削翼４及び 攪拌翼９の外径は、中空管１の内径より小さく構成される。ここで中空管１の内 径より小さい径にしたのは、オーガヘッド２０を中空管１を通って上方に撤収す る際に通過できるようにするためである。The excavation diameter of the preceding excavation blade 3 is smaller than the excavation diameter of the excavation blade 4. For example, the digging diameter of the digging blade 4 is set to 1000 mm, and the digging diameter of the preceding digging blade 3 is set to 500 mm. The preceding excavation blade 3 may be attached in any horizontal direction, and may be parallel or orthogonal to the excavation blade 4. The outer diameters of the excavating blade 4 and the stirring blade 9 are smaller than the inner diameter of the hollow tube 1. Here, the diameter smaller than the inner diameter of the hollow tube 1 is provided so that the auger head 20 can pass through when the hollow tube 1 is withdrawn upward.
【００１０】 前記逆転掘削翼５は、オーガロッド２に回転自在に遊嵌された支持部材６に枢 軸７により枢着され、シャーピン８により拡開状態（水平位置状態）に保持され 、拡開状態で中空管１の外径と略同一に構成されている。この逆転掘削翼５は、 中空管１の伝動部材１１と係合することによって中空管１の回転が伝動され、先 行掘削翼３，掘削翼４及び攪拌翼９とは逆回転し、掘削すると共に共廻り防止及 び攪拌の作用もするものである。また、前記逆転掘削翼５がシャーピン８で拡開 状態（水平位置状態）に保持されているのは、拡開状態で掘削，攪拌及び共廻り の防止を行い、掘削攪拌終了後は、シャーピン８を剪断し枢軸７を中心として図 １に鎖線で示す様に回動縮退させ中空管１を通って地上に撤収するとき通過でき るようにするためである。前記シャーピン８は、オーガロッド２と共にオーガヘ ッド２０を引揚げると逆転掘削翼５が中空管１の下端部に係止され剪断される。 従って、シャーピン８は、剪断を比較的容易で確実にするため被剪断位置に剪断 用の環状Ｖ溝（図示せず）が設けられている。The reverse excavation blade 5 is pivotally attached to a support member 6 rotatably fitted in the auger rod 2 by a pivot 7, and is held in an expanded state (horizontal position) by a shear pin 8 and expanded. In the state, the outer diameter of the hollow tube 1 is substantially the same. The reverse excavation blade 5 is engaged with the transmission member 11 of the hollow tube 1 to transmit the rotation of the hollow tube 1, and reversely rotates with respect to the leading excavation blade 3, the excavation blade 4 and the stirring blade 9, While excavating, it also functions to prevent co-rotation and stir. Further, the reverse excavation blade 5 is held in the expanded state (horizontal position state) by the shear pin 8 to prevent excavation, stirring and co-rotation in the expanded state, and after completion of the excavation stirring, the shear pin 8 is held. This is for shearing and pivoting around the pivot axis 7 as shown by the chain line in FIG. 1 so that the hollow tube 1 can pass through when retracted to the ground. When the auger head 20 is pulled up together with the auger rod 2, the shear pin 8 has the reverse excavation blade 5 locked by the lower end portion of the hollow tube 1 and sheared. Therefore, the shear pin 8 is provided with an annular V groove (not shown) for shearing at the position to be sheared in order to make shearing relatively easy and reliable.
【００１１】 また、硬質の中間層及び硬質の支持層でも確実に掘削攪拌することができるよ うに、オーガロッド２の下端（先端）を円錐状に形成し、この円錐部１２に外径 がオーガロッド２の外径と略同程度の螺旋状掘削翼１３を設けてもよい。更に、 前記オーガロッド２の途中には、スタビライザ１４が回転自在に遊嵌される。こ のスタビライザ１４は、外径が中空管１の内側に摺接するように設定され、掘削 中の中空管１の芯ズレを防止すると共にオーガロッド２の屈曲を防止するもので ある。また、遊嵌することにより施工時の中空管１とオーガロッド２の噛み合い を防止すると共に掘削終了後の引揚げを容易にする。Further, the lower end (tip) of the auger rod 2 is formed into a conical shape so that the outer diameter of the conical portion 12 is auger so that the hard intermediate layer and the hard supporting layer can be surely excavated and stirred. A spiral excavation blade 13 having substantially the same diameter as the outer diameter of the rod 2 may be provided. Further, a stabilizer 14 is rotatably loosely fitted in the middle of the auger rod 2. The stabilizer 14 has an outer diameter set so as to be slidably contacted with the inside of the hollow tube 1, and prevents the hollow tube 1 from being displaced during excavation and also prevents the auger rod 2 from bending. Further, the loose fitting prevents the hollow tube 1 and the auger rod 2 from meshing with each other at the time of construction and facilitates lifting after the end of excavation.
【００１２】 次に図６に示すソイルセメント合成杭施工用掘削ロッドを用いて、ソイルセメ ント合成杭を造成する方法を、図８乃至図１２によって説明するが、中空管１及 びオーガロッド２に回転力及び給進力を与え、中空管１及びオーガヘッド２０を 回転給進させる装置は、公知であるので説明は省略する。先ず、図８に示す様に 、地上の所定の位置に、下部にオーガヘッド２０を設けたオーガロッド２を中心 軸に位置させ挿通させた中空管１を垂直状態で配置し、回転及び給進させる公知 の作業機（図示せず）に、中空管１及びオーガロッド２の上端を把持させる。Next, a method of constructing a soil cement composite pile by using the excavation rod for constructing a soil cement composite pile shown in FIG. 6 will be described with reference to FIGS. 8 to 12. The hollow tube 1 and the auger rod 2 are described below. Since a device for applying a rotational force and a feeding force to the hollow tube 1 and the auger head 20 for rotationally advancing is well known, its description is omitted. First, as shown in FIG. 8, the hollow tube 1 in which the auger rod 2 having the auger head 20 at the lower portion is positioned on the central axis and inserted through is vertically arranged at a predetermined position on the ground, and is rotated and fed. A well-known working machine (not shown) for advancing holds the upper ends of the hollow tube 1 and the auger rod 2.
【００１３】 次に、図９に示すようにオーガロッド２の噴出口１０からセメントミルク等の 固化材を地中に噴出しながら、作業機（図示せず）により中空管１及びオーガロ ッド２を回転給進させていくと、地盤の土と固化材とが回転するオーガヘッド２ ０により強制的に掘削，攪拌され、中空管１の外径と略同一か稍々大きい外径の （図３〜図５の場合は中空管３１より大径の）ソイルセメント柱１５が造成され つつそのソイルセメント柱１５の中に中空管１は埋設されていく。前記中空管１ とオーガロッド２の回転は、互いに反対方向が好ましい。この時、地盤はまず回 転給進する先行掘削翼３によって掘り起こされ、次の回転給進する掘削翼４によ って前記より大径に掘削され、更に、次の逆転掘削翼５によって所定径に掘削さ れ、掘り起こされた土は回転する掘削翼４及び攪拌翼９と逆回転の逆転掘削翼５ との間で強制的に細断され、土の共廻りも逆転掘削翼５で防止され、噴出口１０ から噴出する固化材とよく攪拌混合され、均一なソイルセメント柱１５が造成さ れる。特に、逆転掘削翼５は、回転する中空管１の伝動部材１１と係合し、掘削 翼４や攪拌翼９と逆回転するため掘削された土は一層よく細断されるし、固化材 とも一層よく攪拌混合されるため、全長にわたりより均一なソイルセメント柱１ ５が造成される。（図５の場合は、地盤はまず回転給進するオーガ可動刃３４に より中空管３１より大径に掘削され、掘削された土塊は側壁中に喰い込み静止状 態の攪拌補助翼３４Ａにより剪断され細かくなり、さらにオーガ可動刃３４によ り噴出口３８から噴出する固化材とよく攪拌混合され、均一なソイルセメント柱 が形成される。）Next, as shown in FIG. 9, while ejecting a solidifying material such as cement milk from the ejection port 10 of the auger rod 2 into the ground, a hollow tube 1 and an auger rod 1 are operated by a working machine (not shown). When 2 is rotated and fed, the ground soil and the solidified material are forcibly excavated and agitated by the rotating auger head 20, and the outer diameter of the hollow tube 1 is about the same as or slightly larger than the outer diameter. While the soil cement column 15 (having a larger diameter than the hollow pipe 31 in the case of FIGS. 3 to 5) is formed, the hollow pipe 1 is embedded in the soil cement column 15. The hollow tube 1 and the auger rod 2 are preferably rotated in opposite directions. At this time, the ground is first excavated by the preceding excavating blade 3 that is rotatingly advanced, excavated to a larger diameter by the next excavating blade 4 that is rotationally advancing, and further, by the next reversing excavating blade 5 The soil excavated and excavated to a diameter is forcibly shredded between the rotating excavation blade 4 and the stirring blade 9 and the reverse rotation reverse rotation excavation blade 5, and co-rotation of soil is also prevented by the reverse rotation excavation blade 5. Then, it is well stirred and mixed with the solidified material ejected from the ejection port 10 to form a uniform soil cement column 15. Particularly, the reverse excavation blade 5 engages with the transmission member 11 of the rotating hollow tube 1 and rotates in the opposite direction to the excavation blade 4 and the stirring blade 9, so that the excavated soil is more finely shredded and solidified material. Since both are well mixed by stirring, a more uniform soil cement column 15 is formed over the entire length. (In the case of FIG. 5, the ground is first excavated to a diameter larger than the hollow pipe 31 by the auger movable blade 34 that rotates and feeds, and the excavated earth mass is bited into the side wall by the stationary agitating blade 34A. It is sheared and made finer, and is further well agitated and mixed with the solidified material ejected from the ejection port 38 by the auger movable blade 34 to form a uniform soil cement column.)
【００１４】 所定深度まで給進したら図１０に示すように中空管１及びオーガロッド２の給 進を停止し、固化後の圧縮強度がそれまで注入した固化材より大きい固化材に切 り替えて削孔底部をその固化材で充満して根固め部１５ａを形成する。この場合 、オーガは給進しないが回転させた方がよい。また、前記根固め部１５ａの形成 は、所定深度よりも削孔底部の根固め部１５ａの距離だけ浅い深度まで削孔した 時点で、それまで注入した固化材よりも固化後の圧縮強度が大きな固化材に切り 替え、根固め部１５ａの距離だけ固化材を注入しつつ所定深度まで削孔すること で形成してもよい。このとき、中空管１は固化後の圧縮強度の大きい固化材との 付着力を増すために、内面に突起を設けることが望ましい。突起は図６に示すよ うにリング筋１ａを溶接しても良いし、内面リブ付き鋼管等を用いても良い。When the feed is advanced to a predetermined depth, the feed of the hollow tube 1 and the auger rod 2 is stopped as shown in FIG. 10, and the compression strength after solidification is switched to a solidified material that is higher than the solidified material injected until then. The bottom portion of the drilled hole is filled with the solidifying material to form the root consolidation portion 15a. In this case, the auger does not feed, but it is better to rotate it. In addition, when the root consolidation portion 15a is formed, when the hole is drilled to a depth shallower than the depth of the root consolidation portion 15a at the bottom of the hole, the compressive strength after solidification is greater than that of the solidified material injected until then. It may be formed by switching to a solidifying material and injecting the solidifying material for the distance of the root fixing portion 15a and drilling to a predetermined depth. At this time, it is desirable that the hollow tube 1 be provided with protrusions on its inner surface in order to increase the adhesive force with the solidified material having high compressive strength after solidification. The protrusion may be welded to the ring streak 1a as shown in FIG. 6, or a steel pipe with an inner rib may be used.
【００１５】 次に、所定深度まで削孔し中空管１が所定深度に達したら、図１１に示すよう に中空管１を一時的に固定する手段１６、例えば、油圧ジャッキで下方に押圧し たり、油圧チャック等で把持したりして固定し、オーガロッド２を引揚げる。す るとシャーピン８により拡開状態に保持されている逆転掘削翼５は、中空管１の 下端部に突き当たってシャーピン８が剪断されるので下方に折り畳まれ縮退し、 中空管１内を通って引揚げ地上に撤収する。（図３，図５の場合はシャーピン３ ７，３７Ａで拡開状態に保持されている３組のオーガ可動刃３４，３４，３４（ ３４Ａ）は中空管３１の下端部に突き当たってシャーピン３７，３７Ａが剪断さ れるので、下方に折り畳まれて縮退し、図４に示すように中空管３１内を通り地 上へ引揚げられる。）そして、図１２に示すように中空管１を固化後の圧縮強度 が大きな固化材が注入された根固め部１５ａ内に挿入し、ソイルセメント合成杭 １７が完成する。このソイルセメント合成杭１７の造成にあたりスタビライザ１ ４が設けられていると、中空管１の芯ズレやオーガロッド２の屈曲が防止され、 垂直性が確実に維持されて造成される。Next, when the hollow pipe 1 is drilled to a predetermined depth and the hollow pipe 1 reaches the predetermined depth, as shown in FIG. 11, a means 16 for temporarily fixing the hollow pipe 1, for example, a hydraulic jack is pressed downward. Then, the auger rod 2 is lifted by fixing it by gripping it with a hydraulic chuck or the like. Then, the reverse excavation blade 5 held in the expanded state by the shear pin 8 collides with the lower end of the hollow tube 1 and shears the shear pin 8 so that it is folded downward and retracts, so that the inside of the hollow tube 1 is retracted. Retreat through and withdraw to the ground. (In the case of FIG. 3 and FIG. 5, the three sets of auger movable blades 34, 34, 34 (34A) held in the expanded state by the shear pins 37, 37A hit the lower end of the hollow tube 31 and the shear pins 37. , 37A is sheared, so that it is folded downward and retracts, and is pulled through the hollow pipe 31 to the ground as shown in FIG. 4). Then, as shown in FIG. The soil cement composite pile 17 is completed by inserting the solidified material having a high compressive strength after solidification into the root consolidation portion 15a. When the stabilizer 14 is provided for forming the soil cement composite pile 17, the hollow tube 1 is prevented from being misaligned and the auger rod 2 is prevented from bending, and verticality is surely maintained.
【００１６】[0016]
しかるに、図３，図５及び図６に示す従来のソイルセメント合成杭施工用掘削 ロッドでは、掘削され、セメントミルクと混合撹拌されたソイルセメントの一部 が中空管１，３１内を上昇し、図２に示す施工機械の中空管駆動用キャップ６０ の孔６０ａから吹き出す際に２点鎖線６０ｃで示すように勢いよく周囲に飛散し 、施工機械本体、周囲環境等を汚し、その洗浄を入念に行わねばならず、作業効 率が良くなかった。 これは、中空管３１、１内を上昇するソイルセメントが長尺杭の施工や溶接に よる時間経過により凝結しはじめることにより、掘削先端部付近で攪拌混合され た新鮮で流動性のあるソイルセメントの圧が上昇し、オーガロッド３２、２に添 って上昇し６０ａより噴出するためである。 However, in the conventional excavating rod for soil cement composite pile construction shown in FIGS. 3, 5 and 6, part of the soil cement excavated and mixed and stirred with the cement milk rises in the hollow pipes 1 and 31. When blown out from the hole 60a of the hollow pipe drive cap 60 of the construction machine shown in FIG. 2, it scatters vigorously to the surroundings as indicated by the chain double-dashed line 60c, and the construction machine body, the surrounding environment, etc. are polluted and the cleaning is performed. It had to be done carefully and the work efficiency was not good. This is because the soil cement rising in the hollow pipes 31 and 1 begins to set due to the passage of time due to the construction of long piles and welding, and it is a fresh and fluid soil that is agitated and mixed near the excavation tip. This is because the pressure of the cement rises, rises along the auger rods 32 and 2 and spouts from 60a.
【００１７】 本考案は上述した事情に鑑みてなされたものであり、スタビライザ付近に攪拌 棒を設けることにより、中空管内から一部排出されるソイルセメントが勢いよく 飛散しないようにしたソイルセメント合成杭施工用掘削ロッドを提供するもので ある。The present invention has been made in view of the above-mentioned circumstances, and a soil cement synthetic pile in which a portion of the soil cement discharged from the inside of the hollow pipe is prevented from vigorously scattering by providing a stirring rod near the stabilizer. It provides a drilling rod for construction.
【００１８】[0018]
本考案は、鋼管杭、コンクリート杭等の中空管と、該中空管内に挿通されたオ ーガロッドの下部に設けられた少なくとも掘削翼と撹拌翼とを有するオーガヘッ ドと、前記掘削翼付近のオーガロッドに設けられた固化材の噴出口と、外径側が 前記中空管の内側に摺接すると共に、前記オーガロッドの途中に少なくとも１個 が回転自在に設けられたスタビライザとを具備したソイルセメント合成杭造成装 置において、攪拌棒が前記スタビライザに近接した位置に固設されていることを 特徴とする。 The present invention provides a hollow pipe such as a steel pipe pile or a concrete pile, an auger head having at least an excavation blade and a stirring blade provided at a lower part of an auger rod inserted in the hollow pipe, and an auger head near the excavation blade. Soil cement synthesis comprising a solidified material ejection port provided on a rod and a stabilizer having an outer diameter side slidably contacting the inside of the hollow tube and at least one rotatably provided in the middle of the auger rod. In the pile building device, a stirring rod is fixedly provided at a position close to the stabilizer.
【００１９】 また、本考案は、攪拌棒が前記オーガロッドの直径方向両側に放射状に固設さ れていることを特徴とする。Further, the present invention is characterized in that the stirring rods are radially fixed to both sides of the auger rod in the radial direction.
【００２０】 また、本考案は、攪拌棒がスタビライザの片側の近接した位置に少なくとも一 箇所設けられていることを特徴とする。Further, the present invention is characterized in that at least one stir bar is provided at a position close to one side of the stabilizer.
【００２１】 また、本考案は、攪拌棒がスタビライザの上下両側の近接した位置にそれぞれ 少なくとも一箇所設けられていることを特徴とする。Further, the present invention is characterized in that at least one stirring bar is provided at each of adjacent positions on the upper and lower sides of the stabilizer.
【００２２】[0022]
管内を上昇するソイルセメントは回転する攪拌棒と静止したスタビライザとの 間で細かく破砕され目づまりを生じないので圧力が上昇することなく、中空管駆 動用キャップの孔から均質なソイルセメントとして噴出することなく流れ出る。 The soil cement rising in the pipe is finely crushed between the rotating stirring rod and the stationary stabilizer and does not cause clogging, so the pressure does not rise and it is jetted as homogeneous soil cement from the hole of the hollow pipe driving cap. Flows out without.
【００２３】[0023]
以下添付図に基づいて本考案の実施例を詳細に説明する。図１は本考案の一実 施例を示す一部断面正面図、図２はソイルセメント合成杭の施工中の一部を示す 側面図である。 図１に示すように本考案の掘削ロッドにはロッド３２，２に設けられたスタビ ライザ１４に近接して、その上方に攪拌棒５３がその下方に攪拌棒５１，５２が ２本固設されている。攪拌棒は３２φ〜５０φの丸鋼でロッドの両側に一文字状 に溶接されているが、図６に符号９で示されるような攪拌翼であっても良い。 攪拌棒は一文字状に設けた方が地上に置く場合に曲ったり破損したりするおそ れがないので、好ましいが、十文字状にしたり、１２０度の角度に設けても良い 。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a partially sectional front view showing an embodiment of the present invention, and FIG. 2 is a side view showing a part of a soil cement composite pile during construction. As shown in FIG. 1, the excavation rod of the present invention is fixed to the stabilizers 14 provided on the rods 32 and 2 with two stirring rods 53 fixed above and two stirring rods 51 and 52 fixed below. ing. The stirring rod is made of round steel having a diameter of 32φ to 50φ and is welded to both sides of the rod in a single letter, but a stirring blade as indicated by reference numeral 9 in FIG. 6 may be used. It is preferable to provide the stir bar in the shape of a letter so that it will not be bent or damaged when placed on the ground, but it is preferable to make it in the shape of a cross or provided at an angle of 120 degrees.
【００２４】 また、図１ではスタビライザ１４の上下両側に設けてあるが、上側だけとか下 側だけとかの片側だけに設けても良い。また設ける本数は１本以上適宜の数に設 定できる。Further, in FIG. 1, it is provided on both upper and lower sides of the stabilizer 14, but it may be provided on only one side such as only the upper side or the lower side. Further, the number of lines to be provided can be set to one or more as appropriate.
【００２５】 図２において、６０は中空管駆動用キャップ、６０ａはキャップに設けられた 孔でソイルセメント杭施工中この孔６０ａからは実線で示すソイルセメントの吹 き出し６０ｂが流出している。２点鎖線で示す吹き出し６０ｃは従来の攪拌棒が なかった時の状態を示す。 図２においてＡは２点鎖線で囲まれた部分の側面図である。In FIG. 2, 60 is a hollow pipe driving cap, and 60 a is a hole provided in the cap, during the soil cement pile construction, the soil cement blowout 60 b shown by the solid line flows out from this hole 60 a. . A balloon 60c indicated by a chain double-dashed line shows a state without a conventional stirring rod. In FIG. 2, A is a side view of a portion surrounded by a two-dot chain line.
【００２６】 図２において６５はガイドフレームで垂直に立設されており、これにそって、 中空管駆動装置６１とオーガロッド駆動装置６２が滑車６３を経てロープ６３ａ でガイドフレーム６５の頂上から吊下げられている。 ソイルセメント合成杭施工中は、中空管３１，１とオーガロッド３２，２とは 通常互に逆回転しつつ給進され、オーガヘッドによりソイルセメント柱が形成さ れて中空管が沈設される。 その時、掘削翼で掘削された土塊は共廻り防止翼３４Ａ（図５）や逆転掘削翼 ５（図６）と掘削翼との間で剪断され、攪拌翼３４，９で攪拌されてソイルセメ ント柱を形成するが一部は中空管３１，１の中を上昇する。In FIG. 2, reference numeral 65 denotes a guide frame which is vertically installed upright. Along with this, a hollow tube driving device 61 and an auger rod driving device 62 pass through a pulley 63 and a rope 63 a from the top of the guide frame 65. It is suspended. During the soil cement composite pile construction, the hollow pipes 31 and 1 and the auger rods 32 and 2 are normally fed while rotating in reverse to each other, and the soil cement columns are formed by the auger head and the hollow pipes are sunk. It At that time, the soil mass excavated by the excavation blade is sheared between the co-rotation prevention blade 34A (Fig. 5) and the reverse excavation blade 5 (Fig. 6) and the excavation blade, and is agitated by the agitation blades 34 and 9 to the soil cement column. But partly rises in the hollow tubes 31, 1.
【００２７】 前記上昇するソイルセメントは本考案の攪拌棒とスタビライザの間で剪断され 均質な軟らかいソイルセメントとなり、図２の吹出し６０ｂの如く孔６０ａから 下方に落下する。The rising soil cement is sheared between the stirring rod and the stabilizer of the present invention to become a homogeneous soft soil cement, and falls downward from the hole 60a like the blowout 60b in FIG.
【００２８】[0028]
以上詳細に説明した本考案によれば、ソイルセメント合成杭の施工中に中空管 駆動用キャップの孔から下方に吹き出すソイルセメントが攪拌棒により再攪拌さ れて均質な軟らかいソイルセメントとなり、目づまりすることがなくなるので排 出する圧力上昇がなく、従って、噴出することなく流れ出るので、周囲に飛散す ることがなくなり、施工機械本体、周辺環境を汚すことが少なくなり、その洗浄 に手がかかる等の非能率なことがなくなる。 According to the present invention described in detail above, the soil cement blown downward from the hole of the hollow pipe driving cap during construction of the soil cement composite pile is re-stirred by the stirring rod to become a homogeneous soft soil cement, Since there is no clogging, there is no rise in pressure for discharge, and therefore, there is no spouting, so there is no scattering, there is less contamination of the construction machine body and the surrounding environment, and cleaning is easier. Inefficiencies such as this are eliminated.
【図１】本考案の一実施例を示す一部断面正面図であ
る。FIG. 1 is a partially sectional front view showing an embodiment of the present invention.
【図２】ソイルセメント合成杭の施工中の一部を示す側
面図である。FIG. 2 is a side view showing a part of the soil cement composite pile during construction.
【図３】第１の従来例を示す正面図である。FIG. 3 is a front view showing a first conventional example.
【図４】第１の従来例の使用状態を示す正面図である。FIG. 4 is a front view showing a usage state of a first conventional example.
【図５】第２の従来例を示す正面図である。FIG. 5 is a front view showing a second conventional example.
【図６】第３の従来例を示す正面図である。FIG. 6 is a front view showing a third conventional example.
【図７】第３の従来例の伝導部材を示す中空管の部分斜
視図である。FIG. 7 is a partial perspective view of a hollow tube showing a conductive member of a third conventional example.
【図８】第３の従来例のソイルセメント合成杭の造成順
序を示す一工程図である。FIG. 8 is a process chart showing the order of forming a soil cement composite pile of a third conventional example.
【図９】第３の従来例のソイルセメント合成杭の造成順
序を示す次の一工程図である。FIG. 9 is a next step diagram showing the order of forming the soil cement composite pile of the third conventional example.
【図１０】第３の従来例のソイルセメント合成杭の造成
順序を示す次の一工程図である。FIG. 10 is a next process chart showing the order of forming the soil cement composite pile of the third conventional example.
【図１１】第３の従来例のソイルセメント合成杭の造成
順序を示す次の一工程図である。FIG. 11 is a next step diagram showing the order of forming the soil cement composite pile of the third conventional example.
【図１２】第３の従来例のソイルセメント合成杭の造成
順序を示す次の一工程図である。FIG. 12 is a next process chart showing the order of forming the soil cement composite pile of the third conventional example.
１，３１ 中空管 ２，３２ オーガロッド ４ 掘削翼 ９，３４ 攪拌翼 １０，３８ 噴出口 １４ スタビライザ ２０，４０ オーガヘッド ５１，５２，５３ 攪拌棒 1,31 Hollow tube 2,32 Auger rod 4 Excavation blade 9,34 Stirring blade 10,38 Jet port 14 Stabilizer 20,40 Auger head 51,52,53 Stirring rod
Claims (4)
該中空管内に挿通されたオーガロッドの下部に設けられ
少なくとも掘削翼と攪拌翼とを有するオーガヘッドと、 前記掘削翼付近のオーガロッドに設けられた固化材の噴
出口と、 外径側が前記中空管の内側に摺接すると共に、前記オー
ガロッドの途中に少なくとも１個が回転自在に設けられ
たスタビライザとを具備したソイルセメント合成杭造成
装置において、 攪拌棒が前記スタビライザに近接した位置に固設されて
いることを特徴とするソイルセメント合成杭施工用掘削
ロッド。1. A hollow pipe such as a steel pipe pile or a concrete pile,
An auger head provided at a lower portion of an auger rod inserted into the hollow tube, the auger head having at least an excavation blade and a stirring blade; In a soil-cement composite pile building device, which comprises a stabilizer that is slidably contacted with the inside of an empty pipe and at least one of which is rotatably provided in the middle of the auger rod, wherein a stirring rod is fixed at a position close to the stabilizer. A drilling rod for construction of soil cement composite piles.
方向両側に一文字状に固設されていることを特徴とする
請求項１記載のソイルセメント合成杭施工用掘削ロッ
ド。2. The drill rod for soil cement composite pile construction according to claim 1, wherein the stirring rods are fixed in a character shape on both sides in the diameter direction of the auger rod.
接した位置に少なくとも一箇所設けられていることを特
徴とする請求項１記載のソイルセメント合成杭施工用掘
削ロッド。3. The excavating rod for soil cement composite pile construction according to claim 1, wherein the stirring rod is provided at at least one location on one side of the stabilizer, which is close to one side.
の近接した位置にそれぞれ少なくとも一箇所設けられた
ことを特徴とする請求項１記載のソイルセメント合成杭
施工用掘削ロッド。4. The drill rod for soil cement composite pile construction according to claim 1, wherein the agitation rod is provided at at least one position on each of the upper and lower sides of the stabilizer in close proximity to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993044515U JP2587777Y2 (en) | 1993-07-23 | 1993-07-23 | Drilling rod for soil cement composite pile construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993044515U JP2587777Y2 (en) | 1993-07-23 | 1993-07-23 | Drilling rod for soil cement composite pile construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0710036U true JPH0710036U (en) | 1995-02-10 |
| JP2587777Y2 JP2587777Y2 (en) | 1998-12-24 |
Family
ID=12693689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993044515U Expired - Fee Related JP2587777Y2 (en) | 1993-07-23 | 1993-07-23 | Drilling rod for soil cement composite pile construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2587777Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761522A (en) * | 2021-02-03 | 2021-05-07 | 上海帝泰基础工程有限公司 | High-pressure rotary stirring pile and operation method thereof |
| CN113926808A (en) * | 2021-11-23 | 2022-01-14 | 中国建筑第八工程局有限公司 | Device for dredging final setting cement slurry pipe blockage of acoustic pipe grouting pile and construction method |
| CN117211318A (en) * | 2023-10-12 | 2023-12-12 | 湖南科技大学 | Multidirectional waterproof curtain combined water control and sedimentation control structure and construction method |
| JP2024053133A (en) * | 2022-10-03 | 2024-04-15 | 株式会社Skt | Drilling rod |
-
1993
- 1993-07-23 JP JP1993044515U patent/JP2587777Y2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761522A (en) * | 2021-02-03 | 2021-05-07 | 上海帝泰基础工程有限公司 | High-pressure rotary stirring pile and operation method thereof |
| CN113926808A (en) * | 2021-11-23 | 2022-01-14 | 中国建筑第八工程局有限公司 | Device for dredging final setting cement slurry pipe blockage of acoustic pipe grouting pile and construction method |
| JP2024053133A (en) * | 2022-10-03 | 2024-04-15 | 株式会社Skt | Drilling rod |
| CN117211318A (en) * | 2023-10-12 | 2023-12-12 | 湖南科技大学 | Multidirectional waterproof curtain combined water control and sedimentation control structure and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2587777Y2 (en) | 1998-12-24 |
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