JP2021025195A - Tubular pile - Google Patents
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- JP2021025195A JP2021025195A JP2019140408A JP2019140408A JP2021025195A JP 2021025195 A JP2021025195 A JP 2021025195A JP 2019140408 A JP2019140408 A JP 2019140408A JP 2019140408 A JP2019140408 A JP 2019140408A JP 2021025195 A JP2021025195 A JP 2021025195A
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 3
- 238000005192 partition Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000009412 basement excavation Methods 0.000 description 24
- 239000012141 concentrate Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000002597 Solanum melongena Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Description
本発明は、地中に埋設される管状杭に関する。 The present invention relates to a tubular pile buried underground.
従来から、円筒状に延びる本体部に、その延びる方向と交差する平面に沿ってそれぞれ扇状に拡がる一対の羽根部を備えた管状杭が用いられている（特許文献１参照）。この管状杭は、本体部のなす円筒の軸線を回転中心として回転させて地面を掘削させ、管状杭自体を地中の所定深さまで到達させて埋設することにより、構造体の基礎となる。 Conventionally, a tubular pile having a pair of blades extending in a fan shape along a plane intersecting the extending direction has been used for a main body portion extending in a cylindrical shape (see Patent Document 1). This tubular pile becomes the foundation of a structure by rotating the axis of the cylinder formed by the main body as the center of rotation to excavate the ground and burying the tubular pile itself to a predetermined depth in the ground.
この種の管状杭では、本体部の延びる方向および本体部をなす円筒の中心線が延びる方向で形成される平面視で、一対の羽根部が、それぞれ反対方向に傾斜することで、本体部をなす円筒の中心軸上で交差する構成とされている。 In this type of tubular pile, in a plan view formed in the direction in which the main body extends and the direction in which the center line of the cylinder forming the main body extends, the pair of blades incline in opposite directions to tilt the main body. It is configured to intersect on the central axis of the eggplant cylinder.
そして、地面を掘削させるにあたっては、土や石などの掘削物が一対の羽根部により上方へと搬送されていくことになるが、それぞれ分離した別部材である羽根部を反対方向に傾斜させているという構造上、一対の羽根部で形成される掘削物の搬送経路中に上下方向の大きな段差が形成された状態となっており、この段差によりスムーズな掘削物の搬送が妨げられやすい。このように、掘削物の搬送が妨げられることは、管状杭による掘削効率を低下させてしまうため、望ましいことではない。 Then, when excavating the ground, excavated objects such as soil and stone are transported upward by a pair of blades, but the blades, which are separate members, are tilted in opposite directions. Due to the structure, a large step in the vertical direction is formed in the transport path of the excavated material formed by the pair of blades, and this step tends to hinder the smooth transport of the excavated material. It is not desirable that the transportation of the excavated material is hindered in this way because the excavation efficiency of the tubular pile is reduced.
本発明は、このような課題を解決するためになされたものであり、その目的は、管状杭において、従来よりも掘削物の搬送を妨げられにくくして掘削効率を高めるための技術を提供することである。 The present invention has been made to solve such a problem, and an object of the present invention is to provide a technique for improving excavation efficiency by making tubular piles less likely to interfere with the transportation of excavated objects than before. That is.
上記課題を解決するため、本発明は、円筒状に延びる本体部と、前記本体部の先端側において、該本体部をその円筒の中心線で二等分してなる円弧それぞれの外周面から、前記本体部の延びる方向と交差する平面に沿って扇状に拡がる板材として設けられた一対の羽根部と、を備え、一対の前記羽根部は、前記本体部の延びる方向および該本体部をなす円筒の中心線が延びる方向で形成される第１平面に投影した場合に、前記本体部の延びる方向と直交する第２平面に対してそれぞれ反対方向に傾斜し、前記本体部において該本体部をなす円筒の中心軸を挟むいずれか一方の領域側で交差する位置関係となるように配置されている管状杭、である。 In order to solve the above problems, the present invention comprises a main body portion extending in a cylindrical shape and an outer peripheral surface of each arc formed by dividing the main body portion into two equal parts by the center line of the cylinder on the tip end side of the main body portion. A pair of blades provided as a plate material extending in a fan shape along a plane intersecting the extending direction of the main body, and the pair of blades are the extending direction of the main body and a cylinder forming the main body. When projected onto the first plane formed in the direction in which the center line of the main body extends, the main body portion is inclined in opposite directions to the second plane orthogonal to the extending direction of the main body portion. Tubular piles, which are arranged so as to intersect with each other on either side of the central axis of the cylinder.
この管状杭においては、一対の羽根部が、本体部における円筒の中心軸を挟むいずれか一方の領域側において交差しているが、この領域側において一対の羽根部を交差させるためには、種々の構成を採用することができる。 In this tubular pile, the pair of blades intersect on one of the regions of the main body that sandwiches the central axis of the cylinder, but in order to intersect the pair of blades on this region, various methods are used. The configuration of can be adopted.
例えば、一対の前記羽根部は、前記第１平面に投影した場合に、前記第２平面に対してそれぞれ反対方向に同一角度をなして傾斜しており、前記本体部をなす円筒の中心軸に挟まれた一方の領域側から他方の領域側へと傾斜する前記羽根部が、他方の領域側から一方の領域側へと傾斜する前記羽根部よりも、前記本体部の先端側へと相対的に変位することで、一方の領域側で交差する位置関係となっている、といった構成を採用してもよい。 For example, when projected onto the first plane, the pair of blades are inclined at the same angle in opposite directions with respect to the second plane, and are inclined to the central axis of the cylinder forming the main body. The blade portion that inclines from one region side sandwiched to the other region side is relative to the tip side of the main body portion with respect to the blade portion that inclines from the other region side to one region side. It is also possible to adopt a configuration in which the positional relationship is such that they intersect on one region side by being displaced to.
上述した管状杭では、一対の羽根部が、それぞれ本体部における円筒の中心軸を挟むいずれか一方の領域側で交差しているため、この領域側における羽根部同士の段差を、中心軸上で交差させる場合よりも小さくすることができる。こうして、一対の羽根部で形成される掘削物の搬送経路を段差の小さなものとすることができ、これにより掘削物の搬送が妨げられにくくなる結果、掘削効率を高めることができる。 In the above-mentioned tubular pile, since the pair of blades intersect on one of the regions of the main body that sandwiches the central axis of the cylinder, the step between the blades on this region is formed on the central axis. It can be made smaller than when crossing. In this way, the transport path of the excavated object formed by the pair of blades can have a small step, and as a result, the transport of the excavated object is less likely to be hindered, and as a result, the excavation efficiency can be improved.
さらに、この管状杭では、本体部をなす円筒の中心軸を挟むいずれか他方の領域側における羽根部同士の段差を、中心軸上で交差させる場合よりも大きくすることができる。これにより、一対の羽根部全体として、本体部の延びる方向に拡がる疑似的な螺旋形状の搬送経路を形成することができるため、より上方への搬送物のスムーズな搬送を実現することができる。 Further, in this tubular pile, the step between the blades on the other side of the central axis of the cylinder forming the main body can be made larger than the case where the blades intersect on the central axis. As a result, it is possible to form a pseudo spiral-shaped transport path that extends in the extending direction of the main body portion as the entire pair of blade portions, so that it is possible to realize smooth transport of the transported object further upward.
また、円筒の中心軸に挟まれた一方の領域側から他方側へと傾斜する羽根部が、他方の領域側から一方の領域側へと傾斜する羽根部よりも、本体部の先端側へと相対的に変位した構成であれば、地面の掘削に際し、先端側へと変位している羽根部のみが先行して地表へと接触して掘削が行われる。これにより、掘削に際して地中へ向かう力を一方の羽根部のみに集中して加え掘削を行うことができるため、より掘削効率を高めることができる。 Further, the blade portion that is sandwiched between the central axes of the cylinder and is inclined from one region side to the other side is closer to the tip side of the main body portion than the blade portion that is inclined from the other region side to one region side. In the case of a relatively displaced configuration, when excavating the ground, only the blade portion displaced toward the tip side comes into contact with the ground surface in advance and excavation is performed. As a result, it is possible to concentrate the force toward the ground during excavation only on one of the blades and perform excavation, so that the excavation efficiency can be further improved.
また、上記各管状杭は、掘削効率を高めるべく、以下に示した構成を採用するとよい。 Further, each of the above tubular piles may adopt the configuration shown below in order to improve the excavation efficiency.
例えば、一対の前記羽根部は、前記第１平面に投影した場合に、前記第２平面に対してそれぞれ反対方向に１０°〜２０°の角度をなして傾斜し、前記本体部をなす円筒の中心軸に挟まれたいずれか一方の領域のうち、該中心軸から前記第２平面に沿って前記本体部の外周面に至る距離を１００％とした場合に傾斜角に応じた３０％以上となる位置で交差する位置関係となっている、といった構成である。 For example, when projected onto the first plane, the pair of blades are inclined at an angle of 10 ° to 20 ° in opposite directions to the second plane, and the pair of blades is formed by a cylinder forming the main body. Of one of the regions sandwiched between the central axes, when the distance from the central axis to the outer peripheral surface of the main body along the second plane is 100%, it is 30% or more according to the inclination angle. The configuration is such that they intersect at different positions.
より望ましくは、一対の前記羽根部は、前記第１平面に投影した場合に、前記第２平面に対してそれぞれ反対方向に１５°の角度をなして傾斜し、前記本体部をなす円筒の中心軸に挟まれたいずれか一方の領域のうち、該中心軸から前記第２平面に沿って前記本体部の外周面に至る距離を１００％とした場合に傾斜角に応じた５０％以上１００％未満となる位置で交差する位置関係となっている、といった構成としてもよい。 More preferably, when projected onto the first plane, the pair of blades are inclined at an angle of 15 ° in opposite directions to the second plane, and are the centers of the cylinders forming the main body. Of one of the regions sandwiched between the shafts, 50% or more and 100% according to the inclination angle when the distance from the central axis to the outer peripheral surface of the main body along the second plane is 100%. The configuration may be such that the positions intersect at positions less than or equal to.
また、一対の前記羽根部は、前記第１平面に投影した場合に、前記第２平面に対してそれぞれ反対方向に１０°の角度をなして傾斜し、前記本体部をなす円筒の中心軸に挟まれたいずれか一方の領域のうち、該中心軸から前記第２平面に沿って前記本体部の外周面に至る距離を１００％とした場合に傾斜角に応じた３０％以上７０％以下となる位置で交差する位置関係となっている、といった構成としてもよい。 Further, when projected onto the first plane, the pair of blades are inclined at an angle of 10 ° in opposite directions with respect to the second plane to form the central axis of the cylinder forming the main body. Of one of the sandwiched regions, when the distance from the central axis to the outer peripheral surface of the main body along the second plane is 100%, it is 30% or more and 70% or less according to the inclination angle. The configuration may be such that the positions intersect with each other.
出願人はこれら構成であれば羽根部それぞれの傾斜角に応じて好適に掘削効率が高められることを確認している。 The applicant has confirmed that with these configurations, the excavation efficiency can be suitably increased according to the inclination angle of each blade portion.
また、上記各管状杭は、以下に示す構成としてもよい。 Further, each of the above-mentioned tubular piles may have the configuration shown below.
当該構成において、前記本体部は、前記羽根部それぞれに対応する領域を外内に貫通する貫通溝を有しており、前記羽根部は、それぞれ前記本体部をなす円筒よりも外径の大きな半円形の板材であり、該半円における中心軸周辺を前記貫通溝から前記本体部の内部に到達させた状態で該本体部に固定されている。 In the configuration, the main body portion has a through groove that penetrates the region corresponding to each of the blade portions inwardly, and the blade portion has a semicircle having an outer diameter larger than that of the cylinder forming the main body portion. It is a circular plate material, and is fixed to the main body portion in a state where the periphery of the central axis in the semicircle reaches the inside of the main body portion from the through groove.
この管状杭では、半円形の板材である羽根部を本体部の内部に到達させて固定することにより、羽根部としての強度を高めることができる。 In this tubular pile, the strength of the blade portion can be increased by allowing the blade portion, which is a semi-circular plate material, to reach the inside of the main body portion and fixing the blade portion.
また、この管状杭は、以下に示す構成としてもよい。 Further, the tubular pile may have the configuration shown below.
当該構成において、前記本体部の先端側において、該本体部をなす円筒に囲まれた内部空間を該円筒の中心線に沿って仕切る板状の仕切部、を備え、一対の前記羽根部は、それぞれ前記貫通溝から前記本体部の内部に到達し、前記仕切部を挟んだ状態で前記仕切部および前記本体部に固定されている。 In the configuration, on the tip end side of the main body portion, a plate-shaped partition portion that partitions the internal space surrounded by the cylinder forming the main body portion along the center line of the cylinder is provided, and the pair of the blade portions is Each of them reaches the inside of the main body portion from the through groove, and is fixed to the partition portion and the main body portion in a state of sandwiching the partition portion.
この管状杭では、本体部の内側に仕切部を配置し、この仕切部を挟んでそれぞれ半円状の羽根部を固定することにより、管状杭全体としての強度を高めることができる。 In this tubular pile, the strength of the tubular pile as a whole can be increased by arranging a partition portion inside the main body portion and fixing each semicircular blade portion across the partition portion.
また、この管状杭は、以下に示す構成としてもよい。 Further, the tubular pile may have the configuration shown below.
当該構成においては、前記第２平面に投影した場合に本体部をなす円筒の中心軸を中心として点対称となる位置関係で、前記仕切部の表裏面それぞれに沿って本体部の先端から突出するように設けられた一対の掘削刃、を備える。 In this configuration, when projected onto the second plane, it projects from the tip of the main body along the front and back surfaces of the partition in a point-symmetrical positional relationship about the central axis of the cylinder forming the main body. It is provided with a pair of drilling blades, which are provided as described above.
この管状杭では、仕切部の表裏両面に設けられた一対の掘削刃により、地面の掘削を促進させることができる。 In this tubular pile, excavation of the ground can be promoted by a pair of excavation blades provided on both the front and back surfaces of the partition portion.
本発明の実施形態について図面に基づいて説明する。以下の説明は例示であり、本発明は以下の内容に限定されるものではない。なお、各図における図面名称を示す文字、引き出し線、符号、一点鎖線、破線および矢印は、各図面における管状杭１の構成を説明するためのものであり、管状杭１を構成するものではない。 An embodiment of the present invention will be described with reference to the drawings. The following description is an example, and the present invention is not limited to the following contents. The characters, leader lines, symbols, alternate long and short dash lines, broken lines, and arrows indicating the drawing names in each drawing are for explaining the configuration of the tubular pile 1 in each drawing, and do not constitute the tubular pile 1. ..
＜全体構成＞
管状杭１は、図１〜図６に示すように、円筒状に延びる本体部１０と、本体部１０の先端（図１、図２における下端）側においてそれぞれ本体部１０の延びる方向と交差する平面に沿って扇状に拡がる板材として設けられた一対の羽根部２０と、本体部１０の先端側においてその内部に配置された仕切部３０と、仕切部３０の表裏面それぞれに設けられた一対の掘削刃４０と、を備えている。
<Overall configuration>
As shown in FIGS. 1 to 6, the tubular pile 1 intersects the extending direction of the main body 10 and the extending direction of the main body 10 at the tip end (lower end in FIGS. 1 and 2) of the main body 10. A pair of blades 20 provided as a plate material extending in a fan shape along a flat surface, a partition 30 arranged inside the main body 10 on the tip side thereof, and a pair of blades 30 provided on the front and back surfaces of the partition 30. It is equipped with an excavation blade 40.
本体部１０は、先端から他端に向けて延びる筒状の部材であり、図７に示すように、羽根部２０それぞれに対応する領域を外内に貫通する貫通溝１１を有している。 The main body 10 is a tubular member extending from the tip to the other end, and as shown in FIG. 7, has a through groove 11 penetrating the region corresponding to each of the blades 20 inward.
一対の羽根部２０は、本体部１０をその円筒の中心線（図３の平面図における円筒の中心線となる一点鎖線）Ｌで二等分してなる円弧それぞれの外周面から、本体部１０の延びる方向とそれぞれ交差する平面に沿って扇状に拡がる板材として設けられている。 The pair of blades 20 are formed by dividing the main body 10 into two equal parts by the center line of the cylinder (one-point chain line which is the center line of the cylinder in the plan view of FIG. 3) L, and the main body 10 is formed from the outer peripheral surfaces of the respective arcs. It is provided as a plate material that spreads in a fan shape along a plane that intersects the extending direction of each.
各羽根部２０は、図８に示すように、本体部１０の延びる方向（同図上下方向）および本体部１０をなす円筒の中心線Ｌ（図３の平面図を参照）が延びる方向（同図左右方向）で形成される第１平面に投影した場合に、本体部１０の延びる方向と直交する第２平面に対してそれぞれ反対方向に傾斜し、本体部１０において本体部１０をなす円筒の中心軸（同図における円筒の中心線となる一点鎖線）Ｃを挟むいずれか一方の領域（同図の右領域）側で交差する位置関係となるように配置されている。 As shown in FIG. 8, each blade portion 20 has a direction in which the main body portion 10 extends (vertical direction in the same figure) and a direction in which the center line L of the cylinder forming the main body portion 10 (see the plan view of FIG. 3) extends (the same). When projected onto the first plane formed in the left-right direction in the figure), a cylinder that is inclined in opposite directions to the second plane orthogonal to the extending direction of the main body 10 and forms the main body 10 in the main body 10. They are arranged so as to intersect each other on the side of one of the regions (the right region in the figure) sandwiching the central axis (the one-point chain line that is the center line of the cylinder in the figure) C.
本実施形態において、一対の羽根部２０は、第１平面に投影した場合に、第２平面に対してそれぞれ反対方向に同一角度をなして傾斜しており、本体部１０をなす円筒の中心軸Ｃに挟まれた一方の領域側から他方の領域側へと傾斜する羽根部２０が、他方の領域側から一方の領域側へと傾斜する羽根部２０よりも、本体部１０の先端側へと相対的に変位することで、一方の領域側で交差する位置関係となっている。換言すれば、両者の交点Ｐは一方の領域側に位置するように構成されている。 In the present embodiment, when projected onto the first plane, the pair of blade portions 20 are inclined at the same angle in opposite directions with respect to the second plane, and the central axis of the cylinder forming the main body portion 10. The blade portion 20 that is sandwiched between C and is inclined from one region side to the other region side is closer to the tip side of the main body portion 10 than the blade portion 20 that is inclined from the other region side to one region side. Due to the relative displacement, the positional relationship is such that they intersect on one region side. In other words, the intersection P of both is configured to be located on one region side.
また、羽根部２０それぞれは、図８に示すように、第２平面に対してそれぞれ反対方向に１５°（本実施形態では１５°±２°）の角度で傾斜し、中心軸Ｃに挟まれたいずれか一方の領域のうち、中心軸Ｃから第２平面に沿って本体部１０の外周面に至る距離Ｘを１００％とした場合に傾斜角に応じた３０％以上（本実施形態では５０％以上１００％未満）の割合αとなる距離Ｙの位置で交差している（Ｙ＝αＸ）。つまり、一対の羽根部２０は、その傾斜角が大きくなるほど、本体部１０の外周面に近い位置で交差することとなる。 Further, as shown in FIG. 8, each of the blade portions 20 is inclined at an angle of 15 ° (15 ° ± 2 ° in this embodiment) in the opposite direction to the second plane, and is sandwiched between the central axes C. Of any one of the regions, 30% or more according to the inclination angle when the distance X from the central axis C to the outer peripheral surface of the main body 10 along the second plane is 100% (50 in this embodiment). It intersects at the position of the distance Y, which is the ratio α of% or more and less than 100% (Y = αX). That is, the pair of blade portions 20 intersect at a position closer to the outer peripheral surface of the main body portion 10 as the inclination angle thereof increases.
なお、羽根部２０それぞれは、第２平面に対して反対方向に１０°〜２０°の角度で傾斜した構成とすればよく、１０°の角度で傾斜した構成とした場合には、傾斜角に応じて３０％以上７０％以下の割合αとなる距離Ｙの位置で交差した構成とすることが望ましい。 It should be noted that each of the blade portions 20 may be configured to be inclined at an angle of 10 ° to 20 ° in the opposite direction to the second plane, and when the configuration is inclined at an angle of 10 °, the inclination angle may be set. Therefore, it is desirable to have a configuration that intersects at a position of a distance Y such that the ratio α is 30% or more and 70% or less.
出願人は、傾斜角に応じた上記構成であれば羽根部２０それぞれの傾斜角に応じて好適に掘削効率が高められることを確認している。 The applicant has confirmed that the excavation efficiency can be suitably increased according to the inclination angle of each of the blade portions 20 if the above configuration is used according to the inclination angle.
また、この羽根部２０は、それぞれ本体部１０をなす円筒よりも外径の大きな半円形の板材であり、この半円における中心軸周辺の領域２１を、貫通溝１１から本体部１０の内部に到達させた状態で本体部１０に固定されている。これにより、本体部１０の延びる方向と交差する平面に沿って扇状に拡がる板材をなしている。本実施形態においては、羽根部２０それぞれの外径は同一とされている。 Further, the blade portion 20 is a semicircular plate material having an outer diameter larger than that of the cylinder forming the main body portion 10, and the region 21 around the central axis in the semicircle is formed from the through groove 11 to the inside of the main body portion 10. It is fixed to the main body 10 in the reached state. As a result, a plate material that spreads in a fan shape along a plane intersecting the extending direction of the main body portion 10 is formed. In the present embodiment, the outer diameters of the blade portions 20 are the same.
仕切部３０は、本体部１０の先端側において、本体部１０をなす円筒に囲まれた内部空間をこの円筒の中心線Ｌに沿って仕切る板状の部材である。それぞれ貫通溝１１から本体部１０の内部に到達した羽根部２０は、この仕切部３０を挟んだ状態で仕切部３０および本体部１０に固定され（図３参照）、これにより、羽根部２０同士の間に、底面視または平面視で仕切部３０の板厚に相当する空隙が形成されている。 The partition portion 30 is a plate-shaped member that partitions the internal space surrounded by the cylinder forming the main body 10 along the center line L of the cylinder on the tip end side of the main body 10. The blade portions 20 that reach the inside of the main body portion 10 from the through groove 11 are fixed to the partition portion 30 and the main body portion 10 with the partition portion 30 sandwiched therein (see FIG. 3), whereby the blade portions 20 are connected to each other. A gap corresponding to the plate thickness of the partition portion 30 is formed between the two in a bottom view or a plan view.
一対の掘削刃４０は、図３の底面図で示されるように、第２平面に投影した場合に本体部１０をなす円筒の中心軸を中心として点対称となる位置関係で、仕切部３０の表裏面それぞれに沿って本体部１０の先端から突出するように設けられている。ここで、各掘削刃４０は、仕切部３０の表裏面それぞれにおいて、本体部１０をなす円筒の中心軸Ｃから該円筒の中心線Ｌに沿って本体部１０の外周面に至る領域のうち、羽根部２０が本体部１０の先端側から一定上離れて位置している領域（本実施形態では最も離れている領域）に設けられ、これにより、管状杭１にて地面を掘削する際の回転方向に対して上流側に位置している。 As shown in the bottom view of FIG. 3, the pair of excavation blades 40 have a positional relationship of point symmetry about the central axis of the cylinder forming the main body 10 when projected onto the second plane. It is provided so as to project from the tip of the main body 10 along each of the front and back surfaces. Here, each excavation blade 40 is included in a region from the central axis C of the cylinder forming the main body 10 to the outer peripheral surface of the main body 10 along the center line L of the cylinder on the front and back surfaces of the partition portion 30. The blade portion 20 is provided in a region located at a certain distance from the tip end side of the main body portion 10 (the region farthest from the tip side in the present embodiment), whereby the rotation when excavating the ground with the tubular pile 1 It is located upstream with respect to the direction.
ここで、掘削刃４０は、その中心が、一対の羽根部２０が交差する位置よりも中心軸Ｃよりに位置するように設けられている。 Here, the excavation blade 40 is provided so that its center is located closer to the central axis C than the position where the pair of blade portions 20 intersect.
＜効果＞
上記実施形態における管状杭１では、一対の羽根部２０が、それぞれ本体部１０における円筒の中心軸Ｃを挟むいずれか一方の領域側で交差しているため、この領域側における羽根部２０同士の段差を、中心軸Ｃ上で交差させる場合よりも小さくすることができる。こうして、一対の羽根部２０で形成される掘削物の搬送経路を段差の小さなものとすることができ、これにより掘削物の搬送が妨げられにくくなる結果、掘削効率を高めることができる。
<Effect>
In the tubular pile 1 in the above embodiment, since the pair of blade portions 20 intersect on either region side of the main body portion 10 that sandwiches the central axis C of the cylinder, the blade portions 20 on the region side intersect with each other. The steps can be made smaller than when they intersect on the central axis C. In this way, the transport path of the excavated object formed by the pair of blades 20 can have a small step, which makes it difficult for the transport of the excavated object to be hindered, and as a result, the excavation efficiency can be improved.
さらに、この管状杭１では、本体部１０をなす円筒の中心軸Ｃを挟むいずれか他方の領域側における羽根部２０同士の段差を、中心軸Ｃ上で交差させる場合よりも大きくすることができる。これにより、一対の羽根部２０全体として、本体部１０の延びる方向に拡がる疑似的な螺旋形状の搬送経路を形成することができるため、より上方への搬送物のスムーズな搬送を実現することができる。 Further, in the tubular pile 1, the step between the blade portions 20 on either side of the central axis C of the cylinder forming the main body portion 10 can be made larger than the case where the blade portions 20 intersect on the central axis C. .. As a result, the pair of blade portions 20 as a whole can form a pseudo spiral-shaped transport path that extends in the extending direction of the main body portion 10, so that smooth transport of the transported object can be realized. it can.
また、上記実施形態の管状杭１では、半円形の板材である羽根部２０を本体部１０の内部に到達させて固定することにより、羽根部２０としての強度を高めることができる。 Further, in the tubular pile 1 of the above embodiment, the strength of the blade portion 20 can be increased by bringing the blade portion 20 which is a semicircular plate material into the inside of the main body portion 10 and fixing the blade portion 20.
また、上記実施形態の管状杭１では、本体部１０の内側に仕切部３０を配置し、この仕切部３０を挟んでそれぞれ半円状の羽根部２０を固定することにより、管状杭１全体としての強度を高めることができる。 Further, in the tubular pile 1 of the above-described embodiment, the partition portion 30 is arranged inside the main body portion 10, and the semicircular blade portions 20 are fixed with the partition portion 30 interposed therebetween, thereby forming the tubular pile 1 as a whole. The strength of the can be increased.
また、上記実施形態の管状杭１では、仕切部３０の表裏両面に設けられた一対の掘削刃４０により、地面の掘削を促進させることができる。 Further, in the tubular pile 1 of the above embodiment, excavation of the ground can be promoted by a pair of excavation blades 40 provided on both the front and back surfaces of the partition portion 30.
また、上記実施形態の管状杭１では、円筒の中心軸に挟まれた一方の領域側から他方側へと傾斜する羽根部２０が、他方の領域側から一方の領域側へと傾斜する羽根部２０よりも、本体部１０の先端側へと相対的に変位した構成となっている。そのため、地面の掘削に際し、先端側へと変位している羽根部２０のみが先行して地表へと接触して掘削が行われる。これにより、掘削に際して地中へ向かう力を一方の羽根部２０のみに集中して加え掘削を行うことができるため、より掘削効率を高めることができる。 Further, in the tubular pile 1 of the above embodiment, the blade portion 20 that is sandwiched between the central axes of the cylinder and is inclined from one region side to the other side is inclined from the other region side to one region side. The configuration is such that the main body portion 10 is relatively displaced toward the tip end side of the main body portion 10. Therefore, when excavating the ground, only the blade portion 20 displaced toward the tip side comes into contact with the ground surface in advance and excavation is performed. As a result, it is possible to concentrate the force toward the ground during excavation only on one of the blades 20 and perform excavation, so that the excavation efficiency can be further improved.
＜変形例＞
上記実施形態では、羽根部２０の形状を工夫することで、管状杭１による掘削対象物が羽根部２０上方へと搬送されやすくしてもよい。例えば、図９に示すように、羽根部２０それぞれにおいて、半円形の半径をなす直線部分２３のうち、傾斜して本体部１０の先端側に位置する直線部分２３に対し、本体部１０の他端側に位置する面の角を落とすなど面取り加工することが考えられる。ここでは、直線部分２３における本体部１０の先端側に一定の厚さｔ１（板厚の１／３程度）を残しつつ、残りの部分を所定角度（例えば４５°）でもって面取りするとよい。このとき、直線部分２３全長のうち、本体部１０付近における一定の長さｔ２は加工しないようにすることで、本体部１０と羽根部２０とを固定する際の作業（例えば溶接作業）の妨げにならないようにすることが望ましい。
<Modification example>
In the above embodiment, by devising the shape of the blade portion 20, the object to be excavated by the tubular pile 1 may be easily transported above the blade portion 20. For example, as shown in FIG. 9, in each of the blade portions 20, among the straight line portions 23 forming a semicircular radius, the straight line portion 23 that is inclined and located on the tip side of the main body portion 10 is opposed to the main body portion 10 and others. It is conceivable to perform chamfering such as removing the corners of the surface located on the end side. Here, it is preferable to chamfer the remaining portion at a predetermined angle (for example, 45 °) while leaving a constant thickness t1 (about 1/3 of the plate thickness) on the tip end side of the main body portion 10 in the straight portion 23. At this time, out of the total length of the straight portion 23, the constant length t2 in the vicinity of the main body portion 10 is not processed, thereby hindering the work (for example, welding work) when fixing the main body portion 10 and the blade portion 20. It is desirable not to become.
以上、本発明の実施形態や変形例を説明したが、本発明に係る管状杭は、これらに限られず、可能な限りこれらを組み合わせることができる。 Although the embodiments and modifications of the present invention have been described above, the tubular piles according to the present invention are not limited to these, and these can be combined as much as possible.
１…管状杭、１０…本体部、１１…貫通溝、２０…羽根部、２１…中心軸周辺の領域、２３…直線部分、３０…仕切部、４０…掘削刃 1 ... Tubular pile, 10 ... Main body, 11 ... Through groove, 20 ... Blade, 21 ... Area around the central axis, 23 ... Straight part, 30 ... Partition, 40 ... Excavation blade
Claims (8)
前記本体部の先端側において、該本体部をその円筒の中心線で二等分してなる円弧それぞれの外周面から、前記本体部の延びる方向と交差する平面に沿って扇状に拡がる板材として設けられた一対の羽根部と、を備え、
一対の前記羽根部は、前記本体部の延びる方向および該本体部をなす円筒の中心線が延びる方向で形成される第１平面に投影した場合に、前記本体部の延びる方向と直交する第２平面に対してそれぞれ反対方向に傾斜し、前記本体部において該本体部をなす円筒の中心軸を挟むいずれか一方の領域側で交差する位置関係となるように配置されている、
管状杭。 The main body that extends in a cylindrical shape and
On the tip side of the main body, the main body is provided as a plate material that extends in a fan shape from the outer peripheral surface of each arc formed by bisecting the center line of the cylinder along a plane intersecting the extending direction of the main body. With a pair of blades,
A second pair of blades orthogonal to the extending direction of the main body when projected onto a first plane formed in the extending direction of the main body and the extending direction of the center line of the cylinder forming the main body. They are arranged so as to be inclined in opposite directions with respect to the plane and intersect with each other on the region side of the cylinder forming the main body.
Tubular stake.
請求項１に記載の管状杭。 When projected onto the first plane, the pair of blades are inclined at the same angle in opposite directions with respect to the second plane, and are sandwiched between the central axes of the cylinder forming the main body. The blade portion inclined from one region side to the other region side is relatively displaced toward the tip end side of the main body portion with respect to the blade portion inclined from the other region side to the one region side. By doing so, the positional relationship is such that they intersect on one area side.
The tubular pile according to claim 1.
請求項１または請求項２に記載の管状杭。 When projected onto the first plane, the pair of blades are inclined at an angle of 10 ° to 20 ° in opposite directions with respect to the second plane, and the central axis of the cylinder forming the main body is formed. A position that is 30% or more according to the inclination angle when the distance from the central axis to the outer peripheral surface of the main body along the second plane is 100% in any one of the regions sandwiched between the two. It has a positional relationship that intersects with
The tubular pile according to claim 1 or 2.
請求項３に記載の管状杭。 When projected onto the first plane, the pair of blades are inclined at an angle of 15 ° in opposite directions to the second plane, and are sandwiched between the central axes of the cylinder forming the main body. Of any one of the regions, a position where the distance from the central axis to the outer peripheral surface of the main body along the second plane is 50% or more and less than 100% according to the inclination angle. It has a positional relationship that intersects with
The tubular pile according to claim 3.
請求項３に記載の管状杭。 When projected onto the first plane, the pair of blades are inclined at an angle of 10 ° in opposite directions to the second plane, and are sandwiched between the central axes of the cylinder forming the main body. A position of 30% or more and 70% or less according to the inclination angle when the distance from the central axis to the outer peripheral surface of the main body portion along the second plane is 100%. It has a positional relationship that intersects with
The tubular pile according to claim 3.
前記羽根部は、それぞれ前記本体部をなす円筒よりも外径の大きな半円形の板材であり、該半円における中心軸周辺を前記貫通溝から前記本体部の内部に到達させた状態で該本体部に固定されている、
請求項１から５のいずれか一項に記載の管状杭。 The main body portion has a through groove that penetrates the region corresponding to each of the blade portions inside and outside.
Each of the blade portions is a semicircular plate material having an outer diameter larger than that of the cylinder forming the main body portion, and the main body is in a state where the periphery of the central axis in the semicircle reaches the inside of the main body portion from the through groove. Fixed to the part,
The tubular pile according to any one of claims 1 to 5.
一対の前記羽根部は、それぞれ前記貫通溝から前記本体部の内部に到達し、前記仕切部を挟んだ状態で前記仕切部および前記本体部に固定されている、
請求項６に記載の管状杭。 On the tip end side of the main body, a plate-shaped partition that partitions the internal space surrounded by the cylinder forming the main body along the center line of the cylinder is provided.
Each of the pair of the blade portions reaches the inside of the main body portion from the through groove, and is fixed to the partition portion and the main body portion in a state of sandwiching the partition portion.
The tubular pile according to claim 6.
請求項７に記載の管状杭。 It is provided so as to project from the tip of the main body along the front and back surfaces of the partition in a positional relationship that is point-symmetrical about the central axis of the cylinder forming the main body when projected onto the second plane. With a pair of drilling blades,
The tubular pile according to claim 7.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170159A (en) * | 1998-12-03 | 2000-06-20 | Nkk Corp | Vaned screwing pile |
| JP2006177125A (en) * | 2004-12-24 | 2006-07-06 | Soiensu:Kk | Steel pipe pile |
| JP2014111883A (en) * | 2012-11-06 | 2014-06-19 | Haruoka Foundation Co Ltd | Pile |
| WO2015118665A1 (en) * | 2014-02-07 | 2015-08-13 | Ｊｆｅスチール株式会社 | Screw-in-type steel pipe pile |
| JP2017210859A (en) * | 2016-05-21 | 2017-11-30 | 春岡基礎工業株式会社 | Pile |
| WO2019051537A1 (en) * | 2017-09-12 | 2019-03-21 | Patented Foundations Pty Ltd | A pile |
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2019
- 2019-07-31 JP JP2019140408A patent/JP6716124B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170159A (en) * | 1998-12-03 | 2000-06-20 | Nkk Corp | Vaned screwing pile |
| JP2006177125A (en) * | 2004-12-24 | 2006-07-06 | Soiensu:Kk | Steel pipe pile |
| JP2014111883A (en) * | 2012-11-06 | 2014-06-19 | Haruoka Foundation Co Ltd | Pile |
| WO2015118665A1 (en) * | 2014-02-07 | 2015-08-13 | Ｊｆｅスチール株式会社 | Screw-in-type steel pipe pile |
| JP2017210859A (en) * | 2016-05-21 | 2017-11-30 | 春岡基礎工業株式会社 | Pile |
| WO2019051537A1 (en) * | 2017-09-12 | 2019-03-21 | Patented Foundations Pty Ltd | A pile |
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