JP2001262592A - Foundation of structure and execution work method therefor - Google Patents

Foundation of structure and execution work method therefor

Info

Publication number
JP2001262592A
JP2001262592A JP2000075277A JP2000075277A JP2001262592A JP 2001262592 A JP2001262592 A JP 2001262592A JP 2000075277 A JP2000075277 A JP 2000075277A JP 2000075277 A JP2000075277 A JP 2000075277A JP 2001262592 A JP2001262592 A JP 2001262592A
Authority
JP
Japan
Prior art keywords
foundation
column
pile
ground
body flange
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
Application number
JP2000075277A
Other languages
Japanese (ja)
Other versions
JP4473400B2 (en
Inventor
Toshihisa Hatano
俊久 畑野
Takashi Eguchi
孝 江口
Masahiro Nakamura
正博 中村
Etsuro Saito
悦郎 斉藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujita Corp
Original Assignee
Fujita Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujita Corp filed Critical Fujita Corp
Priority to JP2000075277A priority Critical patent/JP4473400B2/en
Publication of JP2001262592A publication Critical patent/JP2001262592A/en
Application granted granted Critical
Publication of JP4473400B2 publication Critical patent/JP4473400B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a foundation structure having large proof strength to a load of a structure and easy in execution work. SOLUTION: This foundation is composed of a foundation material 20 integrally arranged in a lower part of a column base 10 and plural foundation piles 30 driven in the parallel direction to the column base 10 in bedrock G for joining a pile head to the foundation material 20. The foundation material 20 is composed of plural ribs 21 and a body flange 22 proviously joined to the lower part of the column base 10 and a joining member group 23 for joining the pile head of the foundation piles 30 to the body flange 22.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、送電線を高架支持
する鉄塔等、各種構築物を支持するための基礎構造に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic structure for supporting various structures such as a steel tower for supporting a transmission line on an elevated level.

【0002】[0002]

【従来の技術】鉄塔等の柱脚を地山上に支持する基礎構
造としては、従来から、例えば図13に示されるような
基礎杭によるものが知られている。まず図(A)に示さ
れる基礎構造100Aは、地山Gに打設された鋼杭ある
いは場所打ちコンクリート杭等からなる基礎杭102
と、その杭頭102aと結合一体化されたコンクリート
からなるフーチング103で構成され、柱脚101が前
記フーチング103の上に構築されている。前記基礎杭
102は通常、一つのフーチング103あたり、それぞ
れ1本乃至複数本、鉛直に打設される。
2. Description of the Related Art As a foundation structure for supporting a column base such as a steel tower on the ground, there has been conventionally known, for example, a foundation pile as shown in FIG. First, a foundation structure 100A shown in FIG. 1A includes a foundation pile 102 made of a steel pile, a cast-in-place concrete pile, or the like, which is driven into the ground G.
And a footing 103 made of concrete integrated with the pile head 102a, and a column base 101 is constructed on the footing 103. Usually, one to a plurality of foundation piles 102 are vertically driven per footing 103.

【0003】また、図13(B)に示される基礎構造1
00Bは、地山Gに大径の場所打ちコンクリート杭から
なる基礎杭102を鉛直に施工し、その杭頭に、柱脚1
01の下端部を埋め込んで結合したものである。前記基
礎杭102は、鉄筋コンクリートで形成された鉛直な躯
体部102bと、その頭部から地山G上に露出するよう
に延びる鋼管102c内に打設され、柱脚101の下部
を補強・保護する柱体部102dとからなる。
The basic structure 1 shown in FIG.
00B, a foundation pile 102 composed of a large diameter cast-in-place concrete pile is vertically constructed on the ground G, and a column base 1
01 is embedded and connected. The foundation pile 102 is cast into a vertical frame 102b formed of reinforced concrete and a steel pipe 102c extending from the head to be exposed on the ground G, and reinforces and protects the lower part of the column base 101. And a pillar portion 102d.

【0004】[0004]

【発明が解決しようとする課題】ところで近年、例えば
送電路の鉄塔の場合、電力需要の増大に伴う送電線の重
量増大に起因する送電線の弛み量の増大を補償するため
には、送電線の支持高さを高くする必要があり、このた
め鉄塔の高さが高くなる傾向にある。その結果、鉄塔の
重量が増大し、これを支持する基礎構造の支持力を向上
させることが要求されている。しかしながら、上記図1
3に示される従来技術によれば、基礎構造の支持力を向
上させるには、フーチング103の面積を大きくした
り、基礎杭102を大径化する必要があるため、それ自
体の施工コストが高額になるばかりでなく、面積の大き
い土地を確保しなければならないといった問題があっ
た。
In recent years, for example, in the case of a power transmission tower, in order to compensate for an increase in the amount of slack in the transmission line due to an increase in the weight of the transmission line due to an increase in power demand, the transmission line is required. It is necessary to increase the supporting height of the tower, which tends to increase the height of the tower. As a result, the weight of the pylon increases, and it is required to improve the supporting force of the foundation structure that supports the pylon. However, FIG.
According to the prior art shown in FIG. 3, it is necessary to increase the area of the footing 103 or to increase the diameter of the foundation pile 102 in order to improve the supporting force of the foundation structure, so that the construction cost of the foundation is expensive. In addition to this, there was a problem that land with a large area had to be secured.

【0005】また、大径の基礎杭を施工するには大型の
施工機械が必要になるため、例えば山岳の傾斜地等に建
てられる鉄塔の場合、施工機械の足場を確保するための
切土面積を大きくしたり、足場の仮設工事も大掛かりに
なり、施工の困難性や施工コストの上昇を来していた。
[0005] In order to construct a large-diameter foundation pile, a large-sized construction machine is required. For example, in the case of a steel tower built on a mountainous slope, a cut area for securing a foothold for the construction machine is required. Enlargement and temporary construction of the scaffolds also took a large scale, resulting in construction difficulties and increased construction costs.

【0006】本発明は、上述のような問題に鑑みてなさ
れたもので、その主な技術的課題とするところは、構築
物の荷重に対する耐力が大きく、しかも施工が容易な基
礎構造を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a main technical problem thereof is to provide a foundation structure which has a large resistance to a load of a building and is easy to construct. It is in.

【0007】[0007]

【課題を解決するための手段】上述の技術的課題を有効
に解決するための手段として、本発明に係る構築物の基
礎は、構築物の柱の下部に一体的に設けられた基礎材
と、杭頭が前記基礎材に結合され地盤へ前記柱と平行な
方向に打設された一本乃至複数本の基礎杭、又は杭頭が
前記基礎材に結合され地盤へ前記柱の軸心の延長線を中
心として等角度で開いた方向に打設された複数本の基礎
杭と、からなるものである。すなわち、基礎杭が柱と平
行な方向、又は柱の軸心を中心に等角度で開いた方向へ
打設されることによって、構築物の荷重の軸力のみ支持
することになり、またフーチング等を構築しないので、
施工が容易になると共に、施工面積も小さくすることが
できる。
Means for Solving the Problems As means for effectively solving the above technical problems, the foundation of the structure according to the present invention is composed of a base material integrally provided at a lower portion of a pillar of the structure, and a pile. One or more foundation piles whose heads are joined to the base material and are driven into the ground in a direction parallel to the pillars, or an extension of the axis of the pillars to the ground where the pile heads are joined to the foundation material And a plurality of foundation piles driven in the direction opened at an equal angle around the center. That is, when the foundation pile is driven in a direction parallel to the column or in a direction opened at an equal angle around the axis of the column, only the axial force of the load of the structure will be supported, and footing etc. Because we do not build
The construction is easy and the construction area can be reduced.

【0008】本発明において、基礎材は、予め柱の下部
に一体的に設けられ前記柱の軸心方向に延びる複数のリ
ブと、予め前記柱の下部及び前記リブに一体的に設けら
れ前記柱の軸心と直交する面をなす本体フランジと、基
礎杭の杭頭を前記本体フランジに結合する結合部材群
と、からなる構成とすることができる。
In the present invention, the base member is provided integrally with a lower portion of the column in advance and extends in the axial direction of the column, and the base member is provided integrally with the lower portion of the column and the rib in advance. And a connecting member group for connecting a pile head of a foundation pile to the main body flange.

【0009】また、本発明に係る構築物の基礎の施工方
法は、杭頭との結合手段を備える基礎材を柱の下部に一
体的に設ける工程と、地盤上における前記柱の施工予定
位置から、前記地盤内へ前記柱の軸心と平行な方向又は
前記柱の建て込み予定角度を中心として等角度で開いた
方向へ、複数の基礎杭を打設する工程と、前記地盤上の
施工予定位置に前記柱を建て込むと共に、その下部に一
体的に設けられた前記基礎材を、前記結合手段を介して
前記基礎杭の杭頭と結合する工程とからなる。
Further, the method for constructing a foundation of a building according to the present invention comprises the steps of: integrally providing a foundation member having means for coupling with a pile head to a lower portion of a pillar; A step of placing a plurality of foundation piles into the ground in a direction parallel to the axis of the pillar or in a direction opened at an equal angle around the planned angle of the pillar to be built, and a planned construction position on the ground And connecting the foundation material provided integrally therewith to the pile head of the foundation pile via the coupling means.

【0010】[0010]

【発明の実施の形態】次に、本発明に係る構築物の基礎
の好適な実施の形態を、図1乃至図6を参照しながら説
明する。まず図1は、本発明の基礎構造を、その上に構
築された電力用鉄塔の一部と共に概略的に示すもので、
図中の参照符号10は鉄塔の柱脚、20はこの柱脚10
の下端に鍔状に接合された鋼材等からなる基礎材、30
は杭頭30aが前記基礎材20に結合され地山Gへ前記
柱脚10と平行な方向に打設された基礎杭である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the foundation of the construct according to the present invention will be described with reference to FIGS. FIG. 1 schematically shows the basic structure of the present invention together with a part of a power tower built thereon.
Reference numeral 10 in the figure is a column base of a steel tower, and 20 is this column base 10.
Base material made of steel or the like joined to the lower end of
Is a foundation pile in which a pile head 30a is joined to the foundation material 20 and is driven into the ground G in a direction parallel to the column base 10.

【0011】基礎材20は、柱脚10の下部外周に、そ
の軸心を通る平面状をなすように、周方向所定間隔(図
示の例では90°間隔)で溶接により矢羽状に一体接合
された鋼板からなる複数のリブ21と、前記柱脚10の
下部外周に、その軸心と直交する平面をなすように溶接
により一体接合された鋼板からなる正方形状の本体フラ
ンジ22と、前記各リブ21で四分割された領域に位置
して、前記本体フランジ22に設けられた結合部材群2
3を備える。前記各リブ21は、その下端が柱脚10の
下端位置に達しており、それぞれ前記本体フランジ22
に直交して接合されている。また、基礎材20を構成す
るこれらの部材は、めっきあるいは施工後の塗装や吹き
付け等によって防錆される。
The base member 20 is integrally welded to the lower periphery of the column base 10 by welding at predetermined circumferential intervals (90 ° intervals in the illustrated example) so as to form a plane passing through the axis thereof. A plurality of ribs 21 made of a steel plate, and a square main body flange 22 made of a steel plate integrally joined to the outer periphery of the lower part of the column base 10 by welding so as to form a plane perpendicular to its axis. The connecting member group 2 provided on the main body flange 22 is located in the area divided into four by the rib 21.
3 is provided. Each of the ribs 21 has a lower end reaching the lower end position of the column base 10, and each of the ribs 21 has a main body flange 22.
Are joined at right angles to each other. Further, these members constituting the base material 20 are rust-proofed by plating or spraying after construction or the like.

【0012】上記基礎材20は、柱脚10の下部と基礎
杭30の杭頭とを結合するものであると共に、柱脚10
からの鉄塔の荷重を、地山G及び基礎杭30に伝達する
ものである。また、鉄塔の柱脚10は、水平面に対して
所定の傾斜角度をなすように建てられるが、前記基礎杭
30は、この柱脚10と平行になるように打設されるの
で、柱脚10と基礎杭30との間に鉄塔の荷重による曲
げ応力が作用しにくい構造となり、荷重に対する優れた
耐力が得られる。
The base member 20 connects the lower part of the column base 10 and the pile head of the foundation pile 30 and also includes the column base 10.
Is transmitted to the ground G and the foundation pile 30. Further, the column base 10 of the tower is built so as to form a predetermined inclination angle with respect to the horizontal plane. However, since the foundation pile 30 is cast so as to be parallel to the column base 10, the column base 10 The structure is such that bending stress due to the load of the steel tower is unlikely to act between the steel pile and the foundation pile 30, and excellent strength against load is obtained.

【0013】なお、基礎材20の下面には、後述する図
10に示されるように、本体フランジ22より面積の大
きな鉄板4を敷設することによって、一層大きな荷重を
支持可能とすることができる。
By laying an iron plate 4 having a larger area than the main body flange 22 on the lower surface of the base member 20, as shown in FIG.

【0014】一方、基礎杭30としては、公知の構造を
有する比較的小径(例えば300mm以下)の、かつ高
耐力を有するものが好適に用いられる。すなわち、この
基礎杭30は、図3に示されるように、地山Gにおける
軟弱層G1の下端深さまで挿入されると共に、頭部を基
礎材20の本体フランジ22にそれぞれ結合部材群23
を介して結合された鋼管31と、この鋼管31の内周に
挿通され、下端が前記軟弱層G1より下層にある堅固な
支持層G2内へ達すると共に頭部が前記本体フランジ2
2にそれぞれ前記結合部材群23を介して結合された芯
材としての異形鉄筋32と、前記鋼管31及び地山Gと
異形鉄筋32との間に充填された固結材としてのグラウ
ト33とからなるものである。グラウト33は、鋼管3
1の下側(支持層G2内)ではペデスタル状に拡散され
ており、また、このグラウト33の一部は鋼管31の外
周側に回り込んで、地山Gの削孔面に定着されている。
On the other hand, as the foundation pile 30, a pile having a known structure and a relatively small diameter (for example, 300 mm or less) and having a high yield strength is suitably used. That is, as shown in FIG. 3, this foundation pile 30 is inserted to the lower end depth of the soft layer G1 in the ground G, and the head is connected to the main body flange 22 of the foundation member 20 with the connecting member group 23.
And a lower end of the steel pipe 31 which is inserted through the inner periphery of the steel pipe 31 so as to reach a rigid support layer G2 below the soft layer G1 and a head of which is connected to the body flange 2
2 is formed from a deformed reinforcing bar 32 as a core material connected via the connecting member group 23 to the steel pipe 31 and a grout 33 as a consolidated material filled between the ground pile G and the deformed reinforcing bar 32. It becomes. Grout 33 is steel pipe 3
On the lower side of 1 (in the support layer G2), it is diffused in a pedestal shape, and a part of the grout 33 goes around the outer peripheral side of the steel pipe 31 and is fixed on the drilled surface of the ground pile G. .

【0015】図4乃至図6に、基礎材20と基礎杭30
との種々の結合構造が例示されるように、基礎材20に
おける本体フランジ22の、各リブ21で四分割された
領域には、それぞれ基礎杭30の鋼管31を、適当な遊
びをもって挿通可能な結合用孔22aが開設されてい
る。
FIGS. 4 to 6 show a base member 20 and a base pile 30.
The steel pipe 31 of the foundation pile 30 can be inserted into the region of the main body flange 22 of the base material 20 divided into four by each rib 21 with appropriate play, as exemplified by various connection structures with the base member 20. A coupling hole 22a is provided.

【0016】このうち、図4に示される例においては、
結合部材群23は、本体フランジ22の下側に位置する
ように、基礎杭30における鋼管31の頭部近傍の外周
に溶接等により固定される鋼製の下部フランジ231
と、前記結合用孔22aから本体フランジ22の上側へ
突出した前記鋼管31の頭部外周に、溶接等により固定
される鋼製の上部フランジ232と、この上部フランジ
232の上に配置され、複数の螺子部材233の緊結に
よって、前記本体フランジ22との間に上部フランジ2
32を挟着した状態で基礎杭30の杭頭を押さえる鋼製
の支圧板234とで構成される。支圧板234の中央に
は螺子孔234aが開設されており、基礎杭30におけ
る異形鉄筋32の頭部が、この螺子孔234aに螺合さ
れることによって、前記支圧板234に結合されるよう
になっている。
Of these, in the example shown in FIG.
The connecting member group 23 is a steel lower flange 231 fixed by welding or the like to the outer periphery of the base pile 30 near the head of the steel pipe 31 so as to be located below the main body flange 22.
A steel upper flange 232 fixed by welding or the like to the outer periphery of the head of the steel pipe 31 protruding from the coupling hole 22a to the upper side of the main body flange 22, and a plurality of steel upper flanges 232 arranged on the upper flange 232; Of the upper flange 2 between the main body flange 22 and the main body flange 22 by the tightening of the screw member 233 of FIG.
The steel support plate 234 presses the pile head of the foundation pile 30 with the pinch 32 held therebetween. A screw hole 234a is formed at the center of the support plate 234, and the head of the deformed reinforcing bar 32 of the foundation pile 30 is screwed into the screw hole 234a so as to be connected to the support plate 234. Has become.

【0017】また、図5に示される例においては、結合
部材群23は、本体フランジ22の下側に位置するよう
に、基礎杭30における鋼管31の頭部近傍の外周に溶
接等により固定される鋼製の下部フランジ231と、前
記結合用孔22aから本体フランジ22の上側へ突出し
た前記鋼管31の頭部を覆うと共に外周下面が前記本体
フランジ22に当接するように配置され、溶接等により
前記本体フランジ22に固定される鋼製の支圧キャップ
235と、前記支圧キャップ235の上部中央に開設し
た鉄筋挿通孔235aに、基礎杭30における異形鉄筋
32の頭部を挿通状態に結合する一対のナット236,
236とで構成される。
In the example shown in FIG. 5, the connecting member group 23 is fixed to the outer periphery near the head of the steel pipe 31 in the foundation pile 30 by welding or the like so as to be located below the main body flange 22. A lower flange 231 made of steel and a head of the steel pipe 31 protruding from the coupling hole 22a to the upper side of the main body flange 22 and arranged so that an outer peripheral lower surface is in contact with the main body flange 22, and is welded or the like. The head of the deformed reinforcing bar 32 in the foundation pile 30 is connected to the steel supporting cap 235 fixed to the main body flange 22 and the reinforcing bar insertion hole 235a opened at the upper center of the supporting cap 235. A pair of nuts 236,
236.

【0018】また、図6に示される例においては、結合
部材群23は、本体フランジ22の下側に位置するよう
に、基礎杭30における鋼管31の頭部近傍の外周に溶
接等により固定される鋼製の下部フランジ231と、前
記結合用孔22aから本体フランジ22の上側へ突出し
た前記鋼管31の頭部外周に、溶接等により固定される
鋼製の上部フランジ232と、この上部フランジ232
の上に配置され、複数のボルト237によって、前記本
体フランジ22との間に上部フランジ232を挟着した
状態で基礎杭30の杭頭を押さえる鋼製の支圧板234
と、この支圧板234の中央に開設された鉄筋挿通孔2
34bに、基礎杭30における異形鉄筋32の頭部を挿
通状態に結合する一対のナット236,236とで構成
される。
In the example shown in FIG. 6, the connecting member group 23 is fixed to the outer periphery near the head of the steel pipe 31 in the foundation pile 30 by welding or the like so as to be located below the main body flange 22. A steel lower flange 231, a steel upper flange 232 fixed by welding or the like to the outer periphery of the head of the steel pipe 31 projecting upward from the coupling hole 22 a to the main body flange 22, and the upper flange 232.
And a steel bearing plate 234 for holding the pile head of the foundation pile 30 with the upper flange 232 sandwiched between the main body flange 22 and the plurality of bolts 237.
And the reinforcing bar insertion hole 2 opened at the center of the support plate 234.
34b, a pair of nuts 236 and 236 for connecting the head of the deformed reinforcing bar 32 in the foundation pile 30 in an inserted state.

【0019】次に、上記基礎構造を採用した鉄塔を、山
岳部の傾斜地に構築する場合の施工手順を、図7乃至図
10を参照しながら説明する。
Next, a construction procedure for constructing a steel tower adopting the above-mentioned basic structure on a sloping land in a mountainous part will be described with reference to FIGS.

【0020】まず図7に示されるように、地山Gの斜面
1の切土及び足場2の構築を行う。すなわち、鉄塔の基
礎が施工される地山Gの斜面1を切土して、柱脚10の
傾斜角度と直交する勾配をなす切土面1aを形成し、そ
の下側の斜面に構築した仮設足場2との間に、前記切土
により発生した土材3を、前記切土面1aと連続した高
さとなるように盛土する。本発明においては、図13に
示される従来技術のようなフーチング103は施工しな
いため、前記切土面1aは比較的面積の小さなもので良
い。
First, as shown in FIG. 7, cutting of the slope 1 of the ground G and construction of the scaffold 2 are performed. That is, the slope 1 of the ground G on which the foundation of the steel tower is to be constructed is cut to form a cut surface 1a having a slope orthogonal to the inclination angle of the column base 10, and the temporary construction constructed on the slope below the slope. The earth material 3 generated by the cut is buried between the scaffold 2 and the scaffold 2 so as to have a continuous height with the cut surface 1a. In the present invention, since the footing 103 as in the prior art shown in FIG. 13 is not applied, the cut surface 1a may have a relatively small area.

【0021】次に、図8に示されるように、切土により
形成した切土面1a上における、基礎の施工位置に、鉄
板4を敷設する。この鉄板4は、先の図2及び図3等に
示される柱脚10の軸方向投影面積、言い換えれば本体
フランジ22の面積よりも面積が大きいもので、前記本
体フランジ22の各結合用孔22aと対応して、各基礎
杭30の鋼管31を適当な遊びをもって挿通可能な基礎
杭挿通孔4aが開設されているので、基礎杭30の打設
箇所を容易に決定することができる。
Next, as shown in FIG. 8, the iron plate 4 is laid on the cut surface 1a formed by the cut at the construction position of the foundation. The iron plate 4 has an area larger than the projected area in the axial direction of the column base 10 shown in FIGS. 2 and 3 and the like, in other words, the area of the main body flange 22. Correspondingly, the foundation pile insertion hole 4a through which the steel pipe 31 of each foundation pile 30 can be inserted with an appropriate play is opened, so that the placement location of the foundation pile 30 can be easily determined.

【0022】次に、図9に示されるように、施工機械5
によって、鉄板4の基礎杭挿通孔4aから地山G内へ向
けて、前記切土面1aに対して垂直な方向、言い換えれ
ば、前記切土面1a上に建てられる鉄塔の柱脚10の軸
心と平行な方向へ、杭打ちを行う。先に説明したよう
に、基礎杭30は比較的小径のものであるため、小型の
施工機械5によって杭打ちを行うことができる。またこ
のため、仮設足場2や盛土の面積も小さくすることがで
きる。
Next, as shown in FIG.
Thus, the direction perpendicular to the cut surface 1a from the foundation pile insertion hole 4a of the iron plate 4 into the ground G, in other words, the axis of the column base 10 of the steel tower built on the cut surface 1a. Stake out in a direction parallel to the heart. As described above, since the foundation pile 30 has a relatively small diameter, pile driving can be performed by the small construction machine 5. Therefore, the area of the temporary scaffold 2 and the embankment can be reduced.

【0023】各基礎杭30の打設作業においては、よく
知られているように、まず基礎杭30の鋼管31よりも
適宜大径のケーシングを用いてボーリング(ケーシング
掘り)を行い、地山Gにおける支持層G2内に達する削
孔を形成する。その時、前記鋼管31は、ボーリングに
合わせて前記ケーシングと共に地山Gの支持層G2まで
一緒に挿入される。削孔が形成されたら、前記鋼管31
を地山G内に残し、ケーシングだけを引き抜く。次に異
形鉄筋32を鋼管31内に挿入するが、この異形鉄筋3
2にはグラウト33を圧入する装置が取り付けられてい
て、一緒に挿入される。挿入が完了したら、この圧入装
置を用い、前記削孔内にグラウト33を圧入し、これに
合わせて鋼管31を所定の高さまで引き上げる。グラウ
ト33が十分に充填されたら再度鋼管31を挿入し、同
時にグラウト33も圧入する。そして、この時の加圧力
によって、グラウト33が鋼管31の下側でペデスタル
状に拡散される。
As is well known, in the placing operation of each foundation pile 30, first, boring (casing excavation) is performed using a casing having a diameter larger than that of the steel pipe 31 of the foundation pile 30, and Is formed to reach the inside of the support layer G2. At this time, the steel pipe 31 is inserted together with the casing up to the support layer G2 of the ground G in accordance with the boring. After drilling, the steel pipe 31
Is left in the ground G, and only the casing is pulled out. Next, the deformed reinforcing bar 32 is inserted into the steel pipe 31.
A device for press-fitting grout 33 is attached to 2 and is inserted together. When the insertion is completed, the grout 33 is press-fitted into the hole by using the press-fitting device, and the steel pipe 31 is pulled up to a predetermined height in accordance with the grout 33. When the grout 33 is sufficiently filled, the steel pipe 31 is inserted again, and simultaneously the grout 33 is press-fitted. Then, the grout 33 is diffused in a pedestal shape below the steel pipe 31 by the pressing force at this time.

【0024】基礎杭30の打設が終わったら、図10に
示されるように、鉄板4の上に柱脚10を建て込む。柱
脚10は、予めその下部に、結合部材群20におけるリ
ブ21及び本体フランジ22が溶接等により一体的に接
合された状態で、現場に搬入され、建て込まれる。ま
た、基礎杭30の鋼管31の上端部には、先の図3乃至
図5のように、結合部材群23の一部である下部フラン
ジ231が予め溶接等により接合される。
After the placement of the foundation pile 30 is completed, the column base 10 is erected on the iron plate 4 as shown in FIG. The column base 10 is transported to the site and built therein in a state where the ribs 21 and the main body flanges 22 of the coupling member group 20 are integrally joined by welding or the like at a lower portion thereof in advance. As shown in FIGS. 3 to 5, a lower flange 231 which is a part of the coupling member group 23 is previously joined to the upper end of the steel pipe 31 of the foundation pile 30 by welding or the like.

【0025】柱脚10の建て込みに際しては、その下部
に接合された本体フランジ22の各結合用孔22aに、
地山G上の鉄板4の基礎杭挿通孔4aから突出した各基
礎杭30の杭頭を通し、これを結合部材群23によっ
て、図3乃至図5に示されるような方法で結合する。そ
の後は、必要に応じて、塗装や吹き付け等によって、防
錆加工を施してから、土材3を切土面1a上に埋戻す。
When the column base 10 is erected, the connection holes 22a of the main body flange 22 joined to the lower part thereof are
The pile heads of the respective foundation piles 30 protruding from the foundation pile insertion holes 4a of the iron plate 4 on the ground G are passed through, and are coupled by the coupling member group 23 in a manner as shown in FIGS. Thereafter, if necessary, rustproofing is performed by painting, spraying, or the like, and then the earth material 3 is buried on the cut surface 1a.

【0026】上記実施形態においては、基礎杭30を、
柱脚10の軸心と平行に、すなわち各基礎杭30が互い
に平行になるように打設したが、図11に本発明の他の
実施形態として示されるように、柱脚10の軸心Oの延
長線を中心として互いに等角度で開いた方向に打設する
こともできる。
In the above embodiment, the foundation pile 30 is
Although the base piles 30 were driven in parallel with the axis of the column base 10, that is, the foundation piles 30 were parallel to each other, as shown in FIG. 11 as another embodiment of the present invention, the axis O of the column base 10 Can also be cast in directions that are open at equal angles to each other with the extension line of the center as the center.

【0027】この場合、基礎材20の本体フランジ22
は、図12の斜視図に示されるように、各リブ21で四
分割された領域が、それぞれ各基礎杭30の打設方向と
直交する面をなすように傾斜した状態に設けられる。こ
れによって、柱脚10からの荷重を、各基礎杭30の軸
心方向へ伝達することができる。
In this case, the body flange 22 of the base material 20
As shown in the perspective view of FIG. 12, the area divided into four by each rib 21 is provided in a state of being inclined so as to form a plane orthogonal to the driving direction of each foundation pile 30. Thus, the load from the column base 10 can be transmitted in the axial direction of each foundation pile 30.

【0028】なお、本発明において用いられる基礎杭3
0としては、基礎材20と結合可能で、所要の耐力を発
揮するものであれば良い。
The foundation pile 3 used in the present invention
As 0, any material can be used as long as it can be combined with the base material 20 and exhibits required strength.

【0029】[0029]

【発明の効果】本発明に係る基礎構造によれば、基礎杭
が柱と平行な方向、又は柱の軸心を中心に等角度で開い
た方向へ打設されることによって、構築物の荷重に対す
る大きな耐力が得られる。またフーチング等を構築せ
ず、柱と基礎杭を基礎材を用いて結合するため、施工面
積が小さくなり、したがって小型の施工機械でも施工可
能となるので、山岳部の傾斜地等での施工も容易にな
り、工期の短縮及び施工コストの低減を図ることができ
る。
According to the foundation structure according to the present invention, the foundation pile is driven in a direction parallel to the column or in a direction opened at an equal angle around the axis of the column, thereby reducing the load on the structure. Large yield strength is obtained. In addition, the construction area is small because the pillar and the foundation pile are connected using the foundation material without building a footing, etc., so it is possible to carry out construction with a small construction machine. , And the construction period can be shortened and the construction cost can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施形態に係る基礎構造を、その上
に構築された電力用鉄塔の一部と共に概略的に示す説明
図である。
FIG. 1 is an explanatory diagram schematically showing a basic structure according to an embodiment of the present invention, together with a part of a power tower built thereon.

【図2】上記実施形態における基礎材の概略構成を示す
斜視図である。
FIG. 2 is a perspective view showing a schematic configuration of a base material in the embodiment.

【図3】上記実施形態における基礎杭の概略構成を示す
断面図である。
FIG. 3 is a sectional view showing a schematic configuration of a foundation pile in the embodiment.

【図4】上記実施形態における基礎材と基礎杭との結合
構造の一例を示す要部断面図である。
FIG. 4 is a cross-sectional view of a main part showing an example of a connection structure between a base member and a base pile in the embodiment.

【図5】上記実施形態における基礎材と基礎杭との結合
構造の他の例を示す要部断面図である。
FIG. 5 is a cross-sectional view of a main part showing another example of the connection structure between the base material and the base pile in the embodiment.

【図6】上記実施形態における基礎材と基礎杭との結合
構造の他の例を示す要部断面図である。
FIG. 6 is a cross-sectional view of a main part showing another example of the connection structure between the base member and the base pile in the embodiment.

【図7】上記実施形態に係る基礎構造を採用した構築物
の施工において、切土及び足場構築状態を概略的に示す
説明図である。
FIG. 7 is an explanatory diagram schematically showing a cut and a scaffold construction state in the construction of a structure employing the foundation structure according to the embodiment.

【図8】上記実施形態に係る基礎構造を採用した構築物
の施工において、切土面に鉄板を敷設した状態を示す説
明図である。
FIG. 8 is an explanatory diagram showing a state in which an iron plate is laid on a cut surface in the construction of a structure employing the foundation structure according to the embodiment.

【図9】上記実施形態に係る基礎構造を採用した構築物
の施工において、杭打ち作業を示す説明図である。
FIG. 9 is an explanatory diagram showing a pile driving operation in the construction of a structure employing the foundation structure according to the embodiment.

【図10】上記実施形態に係る基礎構造を採用した構築
物の施工において、基礎杭の杭頭と柱脚との結合状態を
概略的に示す説明図である。
FIG. 10 is an explanatory view schematically showing a connection state between a pile head of a foundation pile and a column base in the construction of a structure employing the foundation structure according to the embodiment.

【図11】本発明の他の実施形態における基礎材の概略
構成を示す斜視図である。
FIG. 11 is a perspective view illustrating a schematic configuration of a base material according to another embodiment of the present invention.

【図12】本発明の他の実施形態に係る基礎構造を、そ
の上に構築された電力用鉄塔の一部と共に概略的に示す
説明図である。
FIG. 12 is an explanatory view schematically showing a foundation structure according to another embodiment of the present invention, together with a part of a power tower built thereon.

【図13】従来技術による基礎構造を示す説明図であ
る。
FIG. 13 is an explanatory view showing a basic structure according to a conventional technique.

【符号の説明】[Explanation of symbols]

10 柱脚 20 基礎材 21 リブ 22 本体フランジ 23 結合部材群 30 基礎杭 DESCRIPTION OF SYMBOLS 10 Column base 20 Foundation material 21 Rib 22 Main body flange 23 Connecting member group 30 Foundation pile

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 正博 東京都渋谷区千駄ヶ谷四丁目6番15号 株 式会社フジタ内 (72)発明者 斉藤 悦郎 東京都渋谷区千駄ヶ谷四丁目6番15号 株 式会社フジタ内 Fターム(参考) 2D046 AA14 CA01 DA31  ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masahiro Nakamura 4-6-115 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Etsuro Saito 4-6-115 Sendagaya, Shibuya-ku, Tokyo F term in the company Fujita (reference) 2D046 AA14 CA01 DA31

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 構築物の柱の下部に一体的に設けられた
基礎材と、 杭頭が前記基礎材に結合され地盤へ前記柱と平行な方向
に打設された一本乃至複数本の基礎杭と、からなること
を特徴とする構築物の基礎。
1. A foundation material integrally provided below a pillar of a building, and one or more foundations having a pile head connected to the foundation material and driven into the ground in a direction parallel to the pillar. The foundation of a structure characterized by consisting of a stake.
【請求項2】 構築物の柱の下部に一体的に設けられた
基礎材と、 杭頭が前記基礎材に結合され地盤へ前記柱の軸心の延長
線を中心として等角度で開いた方向に打設された複数本
の基礎杭と、からなることを特徴とする構築物の基礎。
2. A foundation member integrally provided at a lower portion of a column of the building, and a pile head is connected to the foundation member and is opened to the ground at an equal angle around an extension of the axis of the column. A foundation for a structure, comprising a plurality of foundation piles that have been cast.
【請求項3】 基礎材が、 予め柱の下部に一体的に設けられ前記柱の軸心方向に延
びる複数のリブと、 予め前記柱の下部及び前記リブに一体的に設けられ前記
柱の軸心と直交する面をなす本体フランジと、 基礎杭の杭頭を前記本体フランジに結合する結合部材群
と、からなることを特徴とする請求項1又は2に記載の
構築物の基礎。
3. A plurality of ribs, wherein a base material is previously provided integrally with a lower portion of the column and extends in the axial direction of the column; and a shaft of the column which is previously provided integrally with the lower portion of the column and the rib. 3. The foundation of a building according to claim 1, comprising: a main body flange forming a plane orthogonal to the core; and a connecting member group connecting a pile head of a foundation pile to the main body flange. 4.
【請求項4】 杭頭との結合手段を備える基礎材を柱の
下部に一体的に設ける工程と、 地盤上における前記柱の施工予定位置から、前記地盤内
へ前記柱の軸心と平行な方向又は前記柱の建て込み予定
角度を中心として等角度で開いた方向へ、複数の基礎杭
を打設する工程と、 前記地盤上の施工予定位置に前記柱を建て込むと共に、
その下部に一体的に設けられた前記基礎材を、前記結合
手段を介して前記基礎杭の杭頭と結合する工程と、から
なることを特徴とする構築物の基礎の施工方法。
4. A step of integrally providing a foundation member provided with a connection means to a pile head at a lower portion of a column, and from a position where the column is to be constructed on the ground, into the ground and parallel to an axis of the column. A step of placing a plurality of foundation piles in a direction that is opened at an equal angle around the direction or the planned installation angle of the column, and erection of the column at a planned construction position on the ground,
Joining the foundation material provided integrally therewith to the pile head of the foundation pile via the joining means.
JP2000075277A 2000-03-17 2000-03-17 Foundation of construction and construction method Expired - Fee Related JP4473400B2 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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JP4473400B2 JP4473400B2 (en) 2010-06-02

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ID=18593191

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Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006030894A1 (en) * 2004-09-17 2006-03-23 The Tokyo Electric Power Company, Incorporated Foundation structure of tower
JP2019143449A (en) * 2018-02-23 2019-08-29 東急建設株式会社 Foundation structure of platform door, construction method therefor and screw-in jig
WO2020088363A1 (en) * 2018-10-31 2020-05-07 中国电建集团山东电力建设第一工程有限公司 Fast pit marking and lofting method for transmission line foundation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006030894A1 (en) * 2004-09-17 2006-03-23 The Tokyo Electric Power Company, Incorporated Foundation structure of tower
JP2019143449A (en) * 2018-02-23 2019-08-29 東急建設株式会社 Foundation structure of platform door, construction method therefor and screw-in jig
WO2020088363A1 (en) * 2018-10-31 2020-05-07 中国电建集团山东电力建设第一工程有限公司 Fast pit marking and lofting method for transmission line foundation

Also Published As

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JP4473400B2 (en) 2010-06-02

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