JP7507077B2 - Pile foundation structure - Google Patents
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- JP7507077B2 JP7507077B2 JP2020204502A JP2020204502A JP7507077B2 JP 7507077 B2 JP7507077 B2 JP 7507077B2 JP 2020204502 A JP2020204502 A JP 2020204502A JP 2020204502 A JP2020204502 A JP 2020204502A JP 7507077 B2 JP7507077 B2 JP 7507077B2
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
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Description
本発明は、フェンス等に用いられる支柱を立設する際に、その基礎となる杭と支柱とを接合する杭基礎構造に関するものである。 The present invention relates to a pile foundation structure that connects posts that serve as the foundation for erecting posts used for fences, etc.
一般的な杭基礎構造は、敷地境界部に沿って取り付けられるフェンス等を設ける際、これらを構成する支柱を支持するための構造であって、フェンス等の構造に合わせて所定の間隔で杭基礎が地面等の設置面に設けられる。またこのような杭基礎構造は、フェンス等の重量を支え、人為的な外力や風等による自然の外力などに対しても耐えうる構造である必要がある。 A typical pile foundation structure is a structure for supporting the posts that make up a fence or other structure that is attached along the boundary of a property, and pile foundations are installed on the ground or other installation surface at specified intervals to match the structure of the fence or other structure. Furthermore, such a pile foundation structure needs to be able to support the weight of the fence or other structure and to withstand external forces such as man-made forces and natural forces such as wind.
例えば、特許文献１には、地中に圧入した長尺な円筒鋼管に支柱を挿入し、円筒鋼管と支柱との隙間にコンクリートを充填することによって、支柱を強固に支持することができる杭基礎構造が提案されている。 For example, Patent Document 1 proposes a pile foundation structure that can firmly support a pillar by inserting the pillar into a long cylindrical steel pipe pressed into the ground and filling the gap between the cylindrical steel pipe and the pillar with concrete.
特許文献１に示すような杭基礎構造は、支柱を強固に支持する一方で、円筒鋼管と支柱との接合にコンクリートが用いられるため、コンクリートの充填や硬化完了までの養生に手間と時間を要し、作業者の負担軽減や、作業時間の短縮が求められていた。また、フェンス等に用いられる支柱を立設する際には、後にフェンスパネルを取付ける寸法を確保するため、また審美的な観点から、重力方向に平行となるように支柱を立設することが必須とされるが、特許文献１に示すような杭基礎構造においては、支柱を重力方向に平行に立設するのが難しく、一度コンクリートが硬化してしまうと支柱の角度を調整することが困難であった。 While the pile foundation structure shown in Patent Document 1 firmly supports the pillars, concrete is used to join the cylindrical steel pipes to the pillars, which requires time and effort to fill the concrete and allow it to harden, and there was a need to reduce the burden on workers and shorten the work time. Furthermore, when erecting pillars for fences, etc., it is essential that the pillars be erected parallel to the direction of gravity in order to ensure the dimensions for later installation of fence panels and from an aesthetic point of view. However, with the pile foundation structure shown in Patent Document 1, it is difficult to erect the pillars parallel to the direction of gravity, and once the concrete hardens, it is difficult to adjust the angle of the pillars.
そこで、本発明は上記の事項に鑑みてなされたものであり、コンクリートやモルタルを用いることなく支柱を立設させ、容易な構造で支柱の傾き調整をすることができる杭基礎構造を提供するものである。 The present invention was made in consideration of the above, and provides a pile foundation structure that allows posts to be erected without using concrete or mortar and allows the inclination of the posts to be adjusted with a simple structure.
この発明は、上記課題を達成するためになされたものであって、下記を特徴とするものである。 This invention was made to achieve the above objectives and has the following features:
本発明に係る杭基礎構造は、地面に打設される基礎部と、前記基礎部に挿入される支柱とを接合する杭基礎構造において、前記基礎部と前記支柱は複数の締結部材によって接合され、前記基礎部には、高さ方向に間隔を開けて前記締結部材を貫通する複数のスリットが形成され、前記支柱には、前記スリットに対応する位置に複数の貫通孔が形成され、前記基礎部に接合された前記支柱の位置及び傾きを調整する位置調整用クリアランスを有し、前記位置調整用クリアランスは、前記スリットが延びる方向及び前記締結部材が延びる方向に形成される隙間であることを特徴とする。 The pile foundation structure of the present invention is a pile foundation structure that joins a foundation part to be driven into the ground and a support pillar inserted into the foundation part, wherein the foundation part and the support pillar are joined by a plurality of fastening members, the foundation part has a plurality of slits that are spaced apart in the height direction and penetrate the fastening members, the support pillar has a plurality of through holes at positions corresponding to the slits, and has a position adjustment clearance that adjusts the position and inclination of the support pillar joined to the foundation part , and the position adjustment clearance is a gap formed in the direction in which the slits extend and the direction in which the fastening members extend .
本発明に係る杭基礎構造において、前記基礎部及び前記支柱は、中空円筒からなると好適である。 In the pile foundation structure of the present invention, it is preferable that the foundation portion and the support pillar are made of a hollow cylinder.
本発明に係る杭基礎構造において、前記基礎部には、前記締結部材の面圧を受ける支圧部を有すると好適である。 In the pile foundation structure according to the present invention, it is preferable that the foundation portion has a bearing portion that receives the surface pressure of the fastening member.
本発明に係る杭基礎構造において、前記貫通孔には、雌ねじ部を有すると好適である。 In the pile foundation structure of the present invention, it is preferable that the through hole has a female thread portion.
本発明に係る杭基礎構造において、前記基礎部の上部には、天蓋を有すると好適である。 In the pile foundation structure of the present invention, it is preferable that the upper part of the foundation portion has a canopy.
本発明に係る杭基礎構造において、前記基礎部の側面には、抵抗板を有すると好適である。 In the pile foundation structure of the present invention, it is preferable that the side of the foundation portion has a resistance plate.
上記発明の概要は、本発明に必要な特徴の全てを列挙したものではなく、これらの特徴群のサブコンビネーションもまた発明となり得る。 The above summary of the invention does not list all of the features necessary for the present invention, and subcombinations of these features may also constitute inventions.
本発明によれば、コンクリートやモルタルを用いることなく支柱を立設させ、スリットと締結部材との間に作られる傾き位置調整用クリアランスによって、支柱の位置調整及び傾き調整を容易に行うことができる。 According to the present invention, the pillars can be erected without using concrete or mortar, and the position and inclination of the pillars can be easily adjusted by using the inclination adjustment clearance created between the slits and the fastening members.
以下、本発明を実施するための好適な実施形態について、図面を用いて説明する。なお、以下の実施形態は、各請求項に係る発明を限定するものではなく、また、実施形態の中で説明されている特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。 Below, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.
図１は、本実施形態に係る杭基礎構造を用いて設置されたフェンスの一形態を示す正面図、図２は、本実施形態に係る杭基礎構造を示す斜視図、図３は、本実施形態に係る杭基礎構造を示す分解斜視図、図４は、本実施形態に係る支柱を示す分解斜視図、図５は、本実施形態に係る基礎部を示す分解斜視図、図６は、本実施形態に係る支圧金具を示す三面図、図７は、本実施形態に係る杭基礎構造を示す断面図、図８は、本実施形態に係る支柱位置調整時を示す図７のＹ－Ｙ断面図である。 Figure 1 is a front view showing one form of fence installed using the pile foundation structure of this embodiment, Figure 2 is a perspective view showing the pile foundation structure of this embodiment, Figure 3 is an exploded perspective view showing the pile foundation structure of this embodiment, Figure 4 is an exploded perspective view showing the support pillar of this embodiment, Figure 5 is an exploded perspective view showing the foundation part of this embodiment, Figure 6 is a three-sided view showing the support fitting of this embodiment, Figure 7 is a cross-sectional view showing the pile foundation structure of this embodiment, and Figure 8 is a Y-Y cross-sectional view of Figure 7 showing the support position adjustment of this embodiment.
本実施形態に係る杭基礎構造１は、一例として図１に示すように、上部構造２と共にフェンス１００を構成する。 The pile foundation structure 1 according to this embodiment, together with the superstructure 2, constitutes a fence 100, as shown in FIG. 1 as an example.
図１に示すフェンス１００の上部構造２は、支柱１０に継手４を介してフェンスパネル３を固定することによって構成される。図１においてフェンスパネル３は、一例として鋼板等の平板からなり、全面に渡って複数のスリットを等間隔に施したパネルを示すが、フェンスパネル３の形状はこれに限らず、フェンス１００によって敷地境界部を仕切ることができ、その境界部を容易に乗り越えることができないものであればよく、例えば線材を格子状に接合したメッシュ状のパネルや、線材を編み合わせて菱形の網目を形成した金網等であっても構わない。 The superstructure 2 of the fence 100 shown in Figure 1 is constructed by fixing a fence panel 3 to a support 10 via a joint 4. In Figure 1, the fence panel 3 is shown as an example made of a flat plate such as a steel plate with multiple slits evenly spaced across its entire surface, but the shape of the fence panel 3 is not limited to this and can be any shape as long as it can separate the boundary between the lots with the fence 100 and cannot easily cross that boundary. For example, it can be a mesh panel made of wire rods joined in a lattice pattern, or a wire mesh made of wire rods woven together to form a diamond-shaped mesh.
本実施形態に係る杭基礎構造１は、図２及び３に示すように、支柱１０の下端部と地中に設置される基礎部２０とを、複数のボルト４１、ナット４２及びワッシャ４３からなる締結部材によって接合し、上部構造２を支持する。また、杭基礎構造１は、支柱１０と基礎部２０との隙間への、外部からの異物等の進入を防ぐため、図２に示すような天蓋５１を備える。 As shown in Figures 2 and 3, the pile foundation structure 1 according to this embodiment supports the superstructure 2 by joining the lower end of the support pillar 10 to the foundation part 20 installed underground using fastening members consisting of a number of bolts 41, nuts 42, and washers 43. In addition, the pile foundation structure 1 is provided with a canopy 51 as shown in Figure 2 to prevent foreign objects from entering the gap between the support pillar 10 and the foundation part 20 from the outside.
支柱１０は、図４に示すように、中空円筒に形成され、例えば一般構造用炭素鋼鋼管等の材料が用いられる。支柱１０の太さ及び肉厚等は、上部構造２の仕様や、要求される強度等に基づき、適宜設定されるものである。支柱１０の下端部には、基礎部２０と接合するために用いられる複数の貫通孔１１と、貫通孔１１と対応する位置に雌ねじ部１２を備える。 As shown in FIG. 4, the support 10 is formed into a hollow cylinder, and is made of a material such as a general structural carbon steel pipe. The diameter and thickness of the support 10 are appropriately set based on the specifications of the superstructure 2 and the required strength. The lower end of the support 10 has multiple through holes 11 used for joining to the foundation 20, and a female thread portion 12 at a position corresponding to the through holes 11.
貫通孔１１は、支柱１０の両側の側面を貫く貫通孔であって、支柱１０の下端部において、長手方向に間隔を開けて複数設けられる。貫通孔１１の軸は、支柱１０の長手方向の軸に対して垂直であって、支柱１０の円筒断面中心を通る。貫通孔１１の内径は、締結部材であるボルト４１の軸径より大きく形成される。 Through holes 11 are through holes that penetrate both side surfaces of the support 10, and are provided at the lower end of the support 10 with a space between them in the longitudinal direction. The axis of through hole 11 is perpendicular to the longitudinal axis of the support 10 and passes through the center of the cylindrical cross section of the support 10. The inner diameter of through hole 11 is formed to be larger than the shaft diameter of bolt 41, which is a fastening member.
雌ねじ部１２は、貫通孔１１の同軸上であって、支柱１０の一方の側面に設けられる。本実施形態においては、図４に示すように、ナットを支柱１０の側面に溶接することで雌ねじ部１２を形成する。なお、雌ねじ部１２はナット溶接に限らず、支柱１０の肉厚が十分に厚い場合は、支柱１０の側面に直接雌ねじ加工を施しても構わない。雌ねじ加工の方法としては、例えばタップによる切削加工等が用いられる。また、貫通孔１１にブラインドナットをかしめて雌ねじ部を形成しても構わない。 The female thread portion 12 is provided on one side of the support 10, coaxially with the through hole 11. In this embodiment, as shown in FIG. 4, the female thread portion 12 is formed by welding a nut to the side of the support 10. Note that the female thread portion 12 is not limited to nut welding, and if the wall thickness of the support 10 is sufficiently thick, the side of the support 10 may be directly machined to form a female thread. For example, cutting using a tap is used as a method for machining the female thread. The female thread portion may also be formed by crimping a blind nut into the through hole 11.
支柱１０の表面には、上記の貫通孔１１及び雌ねじ部１２の加工が施された後に、錆等による腐食を防ぐため、亜鉛メッキや、ポリエステル樹脂をベース塗料とする静電粉体塗装等が施されると好適である。 After the through holes 11 and female threads 12 are machined, the surface of the support 10 is preferably zinc-plated or electrostatically powder-coated with a polyester resin base paint to prevent corrosion due to rust, etc.
基礎部２０は、上部構造２の仕様に合わせて支柱１０を立設できるよう、適切な間隔で地中に設置される。基礎部２０は、図５に示すように、中空円筒の鋼管からなる鋼管杭２１、支柱１０を接合する際に締結部材の面圧を受ける支圧部となる複数の支圧金具３０、及び、基礎部２０の地中への設置を補強する抵抗板２４を備える。 The foundations 20 are installed in the ground at appropriate intervals so that the pillars 10 can be erected in accordance with the specifications of the superstructure 2. As shown in FIG. 5, the foundations 20 include steel pipe piles 21 made of hollow cylindrical steel pipes, a number of bearing fittings 30 that serve as bearing parts that receive the surface pressure of the fastening members when the pillars 10 are joined, and a resistance plate 24 that reinforces the installation of the foundations 20 in the ground.
鋼管杭２１は、例えば一般構造用炭素鋼鋼管等が用いられ、外径及び肉厚は、上部構造２の仕様や、要求される強度等に基づき適宜設定される。また、鋼管杭２１の内径は、支柱１０を挿入した際に、鋼管杭２１の内径と支柱１０の外径との間に十分なクリアランスＣ１が確保できるように設定される。鋼管杭２１に用いられる鋼管は、上記の条件を満たし、且つ一般的に流通している規格の鋼管が用いられると好適である。鋼管杭２１の上端部には、支柱１０と接合する際にボルト４１を貫通させるスリット２２が、上下に間隔を開けて複数形成される。 The steel pipe pile 21 is made of, for example, a general structural carbon steel pipe, and the outer diameter and thickness are appropriately set based on the specifications of the superstructure 2, the required strength, etc. The inner diameter of the steel pipe pile 21 is set so that a sufficient clearance C1 is ensured between the inner diameter of the steel pipe pile 21 and the outer diameter of the support 10 when the support 10 is inserted. It is preferable that the steel pipe used for the steel pipe pile 21 is a steel pipe that satisfies the above conditions and meets a generally available standard. A plurality of slits 22 are formed at intervals above and below at the upper end of the steel pipe pile 21, through which the bolts 41 pass when the steel pipe pile 21 is joined to the support 10.
スリット２２は、鋼管杭２１の軸に対して垂直方向に長手寸法をもち、両端形状が半円に形成された長孔であって、鋼管杭２１の両側の側面を貫通する。スリット２２の高さ寸法は、両端部の半円の直径と等しく、ボルト４１の軸径よりも大きく形成される。スリット２２の長手方向であって、両端部の向かい合う半円とボルト４１の軸部とのクリアランスは、鋼管杭２１の内径と支柱１０の外径とのクリアランスＣ１と同寸法、またはそれ以上の寸法に設定される。このときのボルト４１の軸径とスリット２２の長手方向のクリアランスを、支柱１０の位置及び角度を調整するための位置調整用クリアランスＣ２とする。なお、本実施形態においてスリット２２は、両端形状が半円である長孔の場合について説明を行ったが、スリット２２の形状はこれに限らず、例えば矩形状の貫通孔であっても構わない。また、スリット２２の長手方向の寸法については、鋼管杭２１の強度等を考慮して適宜短縮しても構わない。スリット２２は、鋼管杭２１の上端部に、上下に間隔を開けて複数形成されるが、スリット２２の上下方向の間隔は、支柱１０に形成される複数の貫通孔１１の上下方向の間隔と同寸法に形成される。 The slit 22 is a long hole having a longitudinal dimension perpendicular to the axis of the steel pipe pile 21, both ends of which are semicircular, and penetrates both side surfaces of the steel pipe pile 21. The height dimension of the slit 22 is equal to the diameter of the semicircle at both ends and is larger than the shaft diameter of the bolt 41. The clearance between the opposing semicircles at both ends of the slit 22 and the shaft of the bolt 41 in the longitudinal direction of the slit 22 is set to be equal to or larger than the clearance C1 between the inner diameter of the steel pipe pile 21 and the outer diameter of the support 10. The clearance between the shaft diameter of the bolt 41 and the longitudinal direction of the slit 22 at this time is set as a position adjustment clearance C2 for adjusting the position and angle of the support 10. In this embodiment, the slit 22 is described as a long hole having both ends of a semicircle, but the shape of the slit 22 is not limited to this, and may be, for example, a rectangular through hole. The longitudinal dimension of the slit 22 may be shortened as appropriate in consideration of the strength of the steel pipe pile 21, etc. The slits 22 are formed in multiple locations at the upper end of the steel pipe pile 21, with the vertical spacing between the slits 22 being the same dimension as the vertical spacing between the multiple through holes 11 formed in the support 10.
支圧金具３０は、図５に示すように、鋼管杭２１の両側面であって、複数のスリット２２と対応する位置に、一つずつ取り付けられる。支圧金具３０は、例えば冷間圧延鋼板等の鋼板からなり、図６に示すように、断面形状が略コの字形に形成される。支圧金具３０は、支柱１０と基礎部２０とを接合する際に、ワッシャ４３が当接し締結部材の受圧面となる平面部３１と、平面部３１の上部に上部屈曲辺３３、下部に下部屈曲辺３５が形成される。 As shown in Figure 5, the bearing fittings 30 are attached one by one to both sides of the steel pipe pile 21 at positions corresponding to the multiple slits 22. The bearing fittings 30 are made of a steel plate, such as a cold-rolled steel plate, and have a generally U-shaped cross section, as shown in Figure 6. The bearing fittings 30 have a flat portion 31 against which the washer 43 abuts and which becomes the pressure-receiving surface of the fastening member when the support 10 and the foundation 20 are joined, an upper bent edge 33 is formed on the top of the flat portion 31, and a lower bent edge 35 is formed on the bottom.
平面部３１は、図６に示すように、スリット３２が支圧金具３０の幅方向の略中央に形成される。スリット３２の形状はスリット２２の形状と等しく形成される。 As shown in FIG. 6, the flat surface portion 31 has a slit 32 formed at approximately the center of the width of the support bracket 30. The shape of the slit 32 is formed to be the same as the shape of the slit 22.
下部屈曲辺３５は、図６に示すように、平面部３１に対して直角に屈曲して形成される。下部屈曲辺３５の長さＡは、一例として曲げ加工が可能であって、最短の長さに形成される。 As shown in FIG. 6, the lower bent side 35 is bent at a right angle to the flat surface portion 31. The length A of the lower bent side 35 can be bent, for example, to the shortest length.
上部屈曲辺３３は、図６に示すように、平面部３１に対して直角に屈曲され、鋼管杭２１の側面形状に対応するように、円弧状の切り欠き３４が形成される。円弧状の切り欠き３４は、その中心線が支圧金具３０の幅方向の略中央となるように形成され、平面部３１と切り欠き３４との最短距離が、下部屈曲辺３５の長さＡと同寸法となるように形成されると好適である。 As shown in FIG. 6, the upper bent edge 33 is bent at a right angle to the flat surface 31, and an arc-shaped cutout 34 is formed to correspond to the side shape of the steel pipe pile 21. The arc-shaped cutout 34 is preferably formed so that its center line is approximately the center of the bearing metal fitting 30 in the width direction, and the shortest distance between the flat surface 31 and the cutout 34 is the same dimension as the length A of the lower bent edge 35.
切り欠き３４は、支圧金具３０の鋼管杭２１への取り付けの際に、鋼管杭２１の側面と当接する。上部屈曲辺３３の最短部の長さと下部屈曲辺３５の長さは、上記の通り共に寸法Ａで等しいため、切り欠き３４を鋼管杭２１の側面に当接させると、下部屈曲辺３５も鋼管杭２１の側面に当接する。したがって、図７に示すように、平面部３１は鋼管杭２１の軸に対して平行に配置することができ、鋼管杭２１の両側面で対応する位置にある支圧金具３０の平面部３１同士も平行に配置される。支圧金具３０は、切り欠き３４を鋼管杭２１の側面に溶接することによって、鋼管杭２１に固定される。 The notch 34 abuts against the side of the steel pipe pile 21 when the bearing fitting 30 is attached to the steel pipe pile 21. Since the length of the shortest part of the upper bent edge 33 and the length of the lower bent edge 35 are both equal to dimension A as described above, when the notch 34 abuts against the side of the steel pipe pile 21, the lower bent edge 35 also abuts against the side of the steel pipe pile 21. Therefore, as shown in FIG. 7, the flat surface 31 can be arranged parallel to the axis of the steel pipe pile 21, and the flat surfaces 31 of the bearing fittings 30 at corresponding positions on both sides of the steel pipe pile 21 are also arranged parallel to each other. The bearing fitting 30 is fixed to the steel pipe pile 21 by welding the notch 34 to the side of the steel pipe pile 21.
抵抗板２４は、鋼管杭２１の側面から外側に向かって立設される板状の部品であって、鋼管杭２１の軸線方向に平行となるように設置される。抵抗板２４は、基礎部２０が地中に設置された際、その表面に対して垂直な方向に外力が作用するときに大きな荷重を受け、その反射的効果として、基礎部２０に強固な抵抗力を持たせることが可能であり、フェンス１００の倒壊を防止する。また、抵抗板２４の表面に対して平行な方向からの力に対しては、大きな外力を受けることはない。したがって基礎部２０を地中に打設等する際には、抵抗板２４への外力を受けずに作業を行うことができる。 The resistance plate 24 is a plate-shaped component that is erected outward from the side of the steel pipe pile 21 and is installed so as to be parallel to the axial direction of the steel pipe pile 21. When the foundation 20 is installed in the ground, the resistance plate 24 receives a large load when an external force acts in a direction perpendicular to its surface, and as a reflective effect, the foundation 20 can have a strong resistance force, preventing the collapse of the fence 100. Furthermore, the resistance plate 24 does not receive a large external force from a direction parallel to the surface of the resistance plate 24. Therefore, when the foundation 20 is cast into the ground, work can be performed without the resistance plate 24 being subjected to external forces.
天蓋５１は、支柱１０の立設後に形成される支柱１０の側面と鋼管杭２１の内面との隙間へ、外部から異物等が進入しないよう防ぐ機能を有する。天蓋５１は、図７に示すように、天井部を有する円筒状の部品であって、天井部には支柱１０を貫通する貫通孔を有している。天蓋５１の内径は、支柱１０が鋼管杭２１の内側で、後述する調整移動をした場合でも、鋼管杭２１と干渉しないように形成される。天蓋５１は、例えば一般構造用圧延鋼材等に塑性加工等を施して形成される。天蓋５１は、錆等による腐食を防ぐため、亜鉛メッキや、ポリエステル樹脂をベース塗料とする静電粉体塗装等が施されると好適である。 The canopy 51 has the function of preventing foreign objects from entering the gap between the side of the support 10 and the inner surface of the steel pipe pile 21 after the support 10 is erected. As shown in FIG. 7, the canopy 51 is a cylindrical part with a ceiling portion, and the ceiling portion has a through hole that penetrates the support 10. The inner diameter of the canopy 51 is formed so that it does not interfere with the steel pipe pile 21 even when the support 10 is moved inside the steel pipe pile 21 for adjustment, as described below. The canopy 51 is formed, for example, by subjecting a rolled steel material for general construction to plastic processing. In order to prevent corrosion due to rust, the canopy 51 is preferably subjected to zinc plating or electrostatic powder coating using polyester resin as a base paint.
次に、上記のような特徴を備える杭基礎構造１において、支柱１０と基礎部２０とを接合する方法について説明する。 Next, we will explain the method of joining the support pillar 10 and the foundation part 20 in the pile foundation structure 1 having the above-mentioned characteristics.
先ず、フェンス１００を立設する設置面において、支柱１０が位置する箇所に鋼管杭２１の打設を行う。その際、鋼管杭２１を鉛直方向に設置し易くするため、事前に設置面には床堀を行う。床堀の深さ及び範囲は、ボルト４１及びナット４２の締結作業が可能であるように、必要に応じて深さ及び範囲を調節する。鋼管杭２１の打設後、図３に示すように、ボルト４１をワッシャ４３に通し、一方の支圧金具３０のスリット３２及び一方の鋼管杭２１のスリット２２に貫通させる。次に、ボルト４１を支柱１０の両側面にある貫通孔１１に貫通させ、雌ねじ部１２に螺合させる。ボルト４１の雌ねじ部１２への螺合については、ボルト４１の頭、ワッシャ４３及び平面部３１とが互いに当接した状態において、支柱１０の軸と鋼管杭２１の軸とが一致するように、ボルト４１に対する雌ねじ部１２の位置を調整する。このとき、ボルト４１の先端は、他方の鋼管杭２１のスリット２２及び他方の支圧金具３０のスリット３２を貫通している。次に、ボルト４１にワッシャ４３を貫通させ、ナット４２を螺合させて締結を行う。上記のボルト４１の挿入及び締結は、複数あるボルト４１についてそれぞれ行う。次に、支柱１０に天蓋５１の貫通孔を貫通させ、天蓋５１を鋼管杭２１に被せることで、支柱１０と鋼管杭２１との隙間を塞ぐことができる。なお、支柱１０の上部構造２に該当する部分に、継手やキャップ等の部品が取り付けられ、支柱１０の上端から天蓋５１を貫通させることができない場合には、あらかじめ天蓋５１を支柱１０の雌ねじ部１２の上方に準備しておく必要がある。 First, on the installation surface on which the fence 100 will be erected, the steel pipe piles 21 are driven into the installation surface at the locations where the posts 10 will be located. At this time, a floor excavation is performed in advance on the installation surface to make it easier to install the steel pipe piles 21 vertically. The depth and range of the floor excavation are adjusted as necessary so that the bolts 41 and nuts 42 can be fastened. After the steel pipe piles 21 are driven into the installation surface, as shown in FIG. 3, the bolts 41 are passed through the washers 43 and passed through the slits 32 of one of the bearing fittings 30 and the slits 22 of one of the steel pipe piles 21. Next, the bolts 41 are passed through the through holes 11 on both sides of the post 10 and screwed into the female threads 12. Regarding the screwing of the bolt 41 into the female threaded portion 12, the position of the female threaded portion 12 relative to the bolt 41 is adjusted so that the axis of the support 10 and the axis of the steel pipe pile 21 coincide with each other in a state where the head of the bolt 41, the washer 43, and the flat portion 31 of the bolt 41 are in contact with each other. At this time, the tip of the bolt 41 penetrates the slit 22 of the other steel pipe pile 21 and the slit 32 of the other bearing metal fitting 30. Next, the bolt 41 is inserted through the washer 43, and the nut 42 is screwed into it to fasten. The above-mentioned insertion and fastening of the bolt 41 is performed for each of the multiple bolts 41. Next, the support 10 is inserted through the through hole of the canopy 51, and the canopy 51 is placed over the steel pipe pile 21, thereby closing the gap between the support 10 and the steel pipe pile 21. In addition, if parts such as joints and caps are attached to the part of the support 10 that corresponds to the superstructure 2, and the canopy 51 cannot be inserted through the top end of the support 10, the canopy 51 must be prepared in advance above the female threaded portion 12 of the support 10.
上記のように立設した支柱１０を、鋼管杭２１に対してスリット２２、２３の長手方向に移動もしくは傾き調整を行いたい場合には、ボルト４１とナット４２との締結を緩め、支柱１０を所定の位置まで移動させ、再びボルト４１とナット４２を締結させる。支柱１０の調整量は、図８に示すように、支柱１０が鋼管杭２１の内壁に当接するまでの範囲（クリアランスＣ１の範囲）となる。このとき、上記の通りボルト４１とスリット２２、２３との間にある位置調整用クリアランスＣ２は、クリアランスＣ１と同寸法、またはそれ以上の寸法に設定されているため、ボルト４１はスリット２２、２３と干渉することなく支柱１０の位置調整が可能である。また、支柱１０を、鋼管杭２１に対してボルト４１の軸線方向に移動もしくは傾き調整を行いたい場合には、ボルト４１とナット４２との締結を緩めた後に、ボルト４１を回転させ、ボルト４１に対する雌ねじ部１２の位置を調整することによって行う。支柱１０の立設及び傾き調整後、鋼管杭２１周囲の床堀り部の埋め戻しを行う。 When it is desired to move the support 10 erected as described above in the longitudinal direction of the slits 22, 23 or adjust the inclination relative to the steel pipe pile 21, the fastening between the bolt 41 and the nut 42 is loosened, the support 10 is moved to a predetermined position, and the bolt 41 and the nut 42 are fastened again. The adjustment amount of the support 10 is the range until the support 10 abuts on the inner wall of the steel pipe pile 21 (the range of the clearance C1 ) as shown in FIG. 8. At this time, since the position adjustment clearance C2 between the bolt 41 and the slits 22, 23 as described above is set to a dimension equal to or larger than the clearance C1 , the position of the support 10 can be adjusted without the bolt 41 interfering with the slits 22, 23. When it is desired to move the support 10 in the axial direction of the bolt 41 or adjust the inclination relative to the steel pipe pile 21, the fastening between the bolt 41 and the nut 42 is loosened, and then the bolt 41 is rotated to adjust the position of the female thread portion 12 relative to the bolt 41. After erecting the support 10 and adjusting its inclination, the excavated floor area around the steel pipe pile 21 is backfilled.
以上のように、本実施形態においては、支柱１０をコンクリートやモルタル等によって基礎部２０に固定させないため、必要に応じて支柱１０の位置調整及び傾き調整が可能であり、施工誤差を吸収することができる。 As described above, in this embodiment, the support pillars 10 are not fixed to the foundation 20 with concrete, mortar, or the like, so the position and inclination of the support pillars 10 can be adjusted as needed, and construction errors can be absorbed.
なお、上記では支柱１０び鋼管杭２１は、中空円筒である場合についての説明を行ったが、支柱１０び鋼管杭２１の形状はこれに限らず、例えば断面形状が中空矩形である材料等で形成されても構わない。また、このような場合で締結部材の受圧面が鋼管杭２１の側面に設けられるならば、支圧金具３０を使用しなくとも構わない。その様な変更又は改良を加えた形態も本発明の技術的範囲に含まれうることが、特許請求の範囲の記載から明らかである。 In the above, the pillar 10 and the steel pipe pile 21 are described as being hollow cylinders, but the shape of the pillar 10 and the steel pipe pile 21 is not limited to this, and they may be made of a material whose cross-sectional shape is, for example, a hollow rectangle. In such a case, if the pressure-receiving surface of the fastening member is provided on the side of the steel pipe pile 21, it is not necessary to use the bearing metal fitting 30. It is clear from the claims that such modified or improved forms are also included in the technical scope of the present invention.
１ 杭基礎構造
１０ 支柱
１１ 貫通孔
１２ 雌ねじ部
２０ 基礎部
２１ 鋼管杭
２２、３２ スリット
２４ 抵抗板
３０ 支圧金具
３１ 平面部
３３ 上部屈曲辺
３４ 切り欠き
３５ 下部屈曲辺
４１ ボルト
４２ ナット
４３ ワッシャ
５１ 天蓋
Ｃ１、Ｃ２ 位置調整用クリアランス
Reference Signs List 1 pile foundation structure 10 support 11 through hole 12 female threaded portion 20 foundation portion 21 steel pipe pile 22, 32 slit 24 resistance plate 30 bearing metal fitting 31 flat portion 33 upper curved edge 34 notch 35 lower curved edge 41 bolt 42 nut 43 washer 51 canopy C1 , C2 position adjustment clearance
Claims (6)
前記基礎部と前記支柱は複数の締結部材によって接合され、
前記基礎部には、高さ方向に間隔を開けて前記締結部材を貫通する複数のスリットが形成され、
前記支柱には、前記スリットに対応する位置に複数の貫通孔が形成され、
前記基礎部に接合された前記支柱の位置及び傾きを調整する位置調整用クリアランスを有し、
前記位置調整用クリアランスは、前記スリットが延びる方向及び前記締結部材が延びる方向に形成される隙間であることを特徴とする杭基礎構造。 In a pile foundation structure that connects a foundation part that is driven into the ground and a support pillar that is inserted into the foundation part,
The base and the support are joined by a plurality of fastening members,
The base portion is formed with a plurality of slits spaced apart in a height direction through which the fastening members pass,
The support pillar is formed with a plurality of through holes at positions corresponding to the slits,
A position adjustment clearance is provided for adjusting the position and inclination of the support column joined to the base portion,
A pile foundation structure , characterized in that the position adjustment clearance is a gap formed in the extension direction of the slit and the extension direction of the fastening member .
前記基礎部及び前記支柱は、中空円筒からなることを特徴とする杭基礎構造。 The pile foundation structure according to claim 1,
A pile foundation structure, characterized in that the foundation portion and the support pillar are made of hollow cylinders.
前記基礎部には、前記締結部材の面圧を受ける支圧部を有する
ことを特徴とする杭基礎構造。 In the pile foundation structure according to claim 1 or 2,
A pile foundation structure characterized in that the foundation portion has a bearing portion that receives the surface pressure of the fastening member.
前記貫通孔には、雌ねじ部を有することを特徴とする杭基礎構造。 In the pile foundation structure according to any one of claims 1 to 3,
A pile foundation structure characterized in that the through hole has a female thread portion.
前記基礎部の上部には、天蓋を有することを特徴とする杭基礎構造。 The pile foundation structure according to any one of claims 1 to 4,
A pile foundation structure characterized in that a canopy is provided on the upper part of the foundation.
前記基礎部の側面には、抵抗板を有することを特徴とする杭基礎構造。 The pile foundation structure according to any one of claims 1 to 5,
A pile foundation structure characterized in that a resistance plate is provided on the side of the foundation.
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