JPH10252080A - Method for reinforcing foundation of pier for high level road - Google Patents
Method for reinforcing foundation of pier for high level roadInfo
- Publication number
- JPH10252080A JPH10252080A JP7071097A JP7071097A JPH10252080A JP H10252080 A JPH10252080 A JP H10252080A JP 7071097 A JP7071097 A JP 7071097A JP 7071097 A JP7071097 A JP 7071097A JP H10252080 A JPH10252080 A JP H10252080A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- footing
- pile
- roadbed
- holes
- 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.)
- Pending
Links
Landscapes
- Foundations (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は高架道路用橋脚の基
礎の補強方法に関し、更に詳細には、路盤の下方の限ら
れた上下スペース内において新たに補強用の杭を増設し
て高架道路用橋脚の基礎を補強する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing a foundation of an elevated road pier, and more particularly, to a method for reinforcing an elevated road by newly adding a reinforcing pile in a limited vertical space below a roadbed. It relates to a method of reinforcing the foundation of a pier.
【０００２】[0002]
【従来の技術】耐震性能を向上させることを目的とし
て、高架道路用橋脚に対して新たな杭を増設し基礎を補
強することは知られている。この場合、路盤の高さが低
い箇所では、杭挿入用穴の掘削作業のスペースや、杭打
ち作業のスペースを確保することが困難となる。そこ
で、このような場合、短い鋼製の杭を多数用意し、これ
ら杭の端部間を溶接により接合しつつ穴に挿入し、杭を
構成することが考えられる。2. Description of the Related Art It is known to reinforce a foundation by adding a new pile to an elevated road pier for the purpose of improving seismic performance. In this case, it is difficult to secure a space for excavation work of the hole for pile insertion and a space for pile driving work in a place where the height of the roadbed is low. Therefore, in such a case, it is conceivable to prepare a large number of short steel piles and insert the piles into the holes while joining the ends of the piles by welding.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな方法では、溶接により接合しつつ杭を穴に挿入して
いくことから、溶接専門の作業員を要し、作業が煩雑に
なる問題がある。また、溶接による接合であるため、杭
の接合部の強度を高めるにも限度があった。本発明は前
記事情に鑑み案出されたものであって、本発明の目的
は、溶接専門の作業員を要せずに、簡単な作業により連
結部の強度に優れ、しかも、高架道路の橋脚の基礎を確
実に補強できる方法を提供することにある。However, in such a method, since the pile is inserted into the hole while being joined by welding, an operator specializing in welding is required, and the work becomes complicated. . In addition, since the joining is performed by welding, there is a limit in increasing the strength of the joining portion of the pile. The present invention has been devised in view of the above circumstances, and an object of the present invention is to eliminate the need for welding specialists, to provide an excellent strength of a connecting portion by a simple operation, and to further improve an elevated road pier. It is an object of the present invention to provide a method that can reliably reinforce the foundation of a vehicle.
【０００４】[0004]
【課題を解決するための手段】前記目的を達成するため
本発明は、地盤に設置され杭により支持されたフーチン
グ部と、このフーチング部から立設された柱と、この柱
で支持された路盤を有する高架道路の橋脚の基礎を補強
する方法であって、直径が１００〜３００mm程度、長さ
が１〜２メートル程度で、かつ、その長手方向の一方の
端部に雄ねじ部が形成され、他方の端部に雌ねじ部が形
成された多数の細径で短い鋼管を用意し、前記路盤の幅
方向におけるフーチング部の両側箇所から、前記鋼管が
挿入される直径で下部に至るにつれて互いに間隔が広が
るようにそれぞれ鉛直に対して斜めに穴を掘削し、この
ような穴を路盤の幅方向におけるフーチング部の両側箇
所で路盤の長手方向に間隔をおいて複数設け、前記穴
に、前記複数の鋼管を前記雄ねじ部と雌ねじ部とを結合
させつつ挿入して鋼管杭とし、この鋼管杭の上端と前記
フーチング部を連結するようにしたことを特徴とする。
また、本発明は、前記路盤の長手方向におけるフーチン
グ部の両側箇所から、前記鋼管が挿入される直径で下部
に至るにつれて互いに間隔が広がるようにそれぞれ鉛直
に対して斜めに穴を掘削し、このような穴を路盤の長手
方向におけるフーチング部の両側箇所で路盤の幅方向に
間隔をおいて複数設け、前記穴に、前記複数の鋼管を前
記雄ねじ部と雌ねじ部とを結合させつつ挿入して鋼管杭
とし、この鋼管杭の上端と前記フーチング部を連結する
ようにしたことを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a footing portion installed on the ground and supported by a pile, a pillar erected from the footing portion, and a roadbed supported by the pillar. A method for reinforcing a foundation of an elevated road pier having a diameter of about 100 to 300 mm, a length of about 1 to 2 meters, and a male screw portion is formed at one end in the longitudinal direction, A large number of small-diameter and short steel pipes having female threads formed at the other end are prepared.From both sides of the footing portion in the width direction of the roadbed, the distance from each other is reduced as the steel pipe is inserted to the lower portion. Excavating holes obliquely to the vertical respectively so as to spread, a plurality of such holes are provided at both sides of the footing portion in the width direction of the subbase at intervals in the longitudinal direction of the subbase, and in the holes, the plurality of Steel pipe A steel pipe pile by inserting while coupling the external thread portion and the female screw portion, characterized in that so as to connect the upper end and the footing portion of the steel pipe pile.
Further, the present invention also excavates holes obliquely with respect to the vertical so that the steel pipes are inserted from both sides of the footing portion in the longitudinal direction of the roadbed in a longitudinal direction so that the distance between the steel pipes and the lower part thereof increases toward the lower part. A plurality of such holes are provided at both sides of the footing portion in the longitudinal direction of the roadbed at intervals in the width direction of the roadbed, and the plurality of steel pipes are inserted into the holes while connecting the male screw portion and the female screw portion. A steel pipe pile is provided, and an upper end of the steel pipe pile is connected to the footing portion.
【０００５】本発明では、溶接専門の作業員を要せず、
鋼管をねじ結合により継ぎ足しつつ穴に効率良く挿入し
ていくことができる。また、直径が１００〜３００mm程
度の細径な鋼管を杭に用いるので、地盤に穴を開ける掘
削機として小型なものを用いることができ、上下スペー
スが制限された箇所において橋脚の基礎を補強する上で
極めて有利となる。また、杭挿入用の穴を掘削する掘削
機を利用して鋼管の継ぎ足しを機械的に行なえる。ま
た、雄ねじ部と雌ねじ部の長さを大きくすることで、鋼
管の結合部の強度に優れた鋼管杭により基礎を補強でき
る。また、増設する杭の下端間の寸法である杭の抵抗幅
が、杭を鉛直に打ち込む場合に比べて大きくなり、橋脚
の基礎の補強強度を高める上でも有利となる。[0005] In the present invention, no welding specialist is required,
The steel pipe can be efficiently inserted into the hole while being added by screw connection. In addition, since a thin steel pipe having a diameter of about 100 to 300 mm is used for the pile, a small excavator for making a hole in the ground can be used, and the foundation of the pier is reinforced in a place where the vertical space is limited. This is extremely advantageous. Further, the steel pipe can be mechanically added by using an excavator for excavating a hole for inserting a pile. In addition, by increasing the length of the male screw portion and the female screw portion, the foundation can be reinforced by a steel pipe pile having excellent strength at the joint portion of the steel pipe. Further, the resistance width of the pile, which is the dimension between the lower ends of the piles to be added, is larger than in the case where the pile is driven vertically, which is advantageous in increasing the reinforcing strength of the pier foundation.
【０００６】[0006]
【発明の実施の形態】次に、本発明の実施例を添付図面
に従って説明する。図１は高架道路の橋脚のフーチング
部の支持状態の正面図であって図３のＸ矢視相当図、図
２は同側面図、図３は同平面図を示す。図１及び図２に
おいて、２は高架道路、４は路盤、６は橋脚、８はフー
チング部を示し、フーチング部８はほぼ正方形に形成さ
れ、フーチング部８の中央には橋脚６の柱１０が立設さ
れ、フーチング部８は、支持地盤１１に達する既設の９
本の杭１２により支持されている。橋脚６の補強は、フ
ーチング部８を囲むように矩形枠状に増設された新たな
フーチング部１４と杭１６によりなされる。なお、既設
の杭１２は、支持杭や摩擦杭、或は、既製コンクリート
杭、場所打ちコンクリート杭、鋼杭等の種別は問わな
い。前記杭１６は鋼管杭であって、細径で短い多数の鋼
管１８がねじ結合により連結されて構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a supporting state of a footing portion of a pier of an elevated road, which is a view corresponding to an arrow X in FIG. 3, FIG. 2 is a side view thereof, and FIG. 1 and 2, 2 is an elevated road, 4 is a roadbed, 6 is a pier, 8 is a footing part, and the footing part 8 is formed in a substantially square shape. A pillar 10 of the pier 6 is formed at the center of the footing part 8. Standing up, the footing section 8 has the existing 9 that reaches the support ground 11.
It is supported by a pile 12 of books. The pier 6 is reinforced by a new footing part 14 and a pile 16 which are additionally provided in a rectangular frame shape so as to surround the footing part 8. The existing pile 12 may be of any type such as a support pile, a friction pile, a ready-made concrete pile, a cast-in-place concrete pile, and a steel pile. The pile 16 is a steel pipe pile, and is constituted by connecting a large number of small and short steel pipes 18 by screw connection.
【０００７】前記鋼管杭１６を施工するに際しては、ま
ず掘削機により、路盤４の幅方向におけるフーチング部
８の両側箇所から前記鋼管１８が挿入される直径で、か
つ、路盤４の長手方向から見て下部に至るにつれて互い
に間隔が広がるようにそれぞれ鉛直に対して斜めに穴２
０が掘削され、このような穴２０は、路盤４の幅方向に
おけるフーチング部８の両側箇所で路盤４の長手方向に
間隔をおいて複数設けられる。また、路盤４の長手方向
におけるフーチング部８の両側箇所からも前記鋼管１８
が挿入される直径で、かつ、路盤４の幅方向から見て下
部に至るにつれて互いに間隔が広がるようにそれぞれ鉛
直に対して斜めに穴２０が掘削され、このような穴２０
は、路盤４の長手方向におけるフーチング部８の両側箇
所で路盤４の幅方向に間隔をおいて複数設けられる。こ
の場合、穴２０を掘削する地盤から路盤４の下面までの
スペースＳの上下寸法が、例えば、２〜３ｍであり、こ
の上下に制限されたスペースＳ内において穴２０が、例
えば、２０〜３０ｍの深さで掘削される。When the steel pipe pile 16 is constructed, first, the excavator has a diameter at which the steel pipe 18 is inserted from both sides of the footing portion 8 in the width direction of the roadbed 4 and is viewed from the longitudinal direction of the roadbed 4. The holes 2 are oblique to the vertical so that the gaps are widened toward the bottom.
0 is excavated, and a plurality of such holes 20 are provided at both sides of the footing portion 8 in the width direction of the roadbed 4 at intervals in the longitudinal direction of the roadbed 4. Further, the steel pipe 18 is also provided from both sides of the footing 8 in the longitudinal direction of the roadbed 4.
Are drilled obliquely with respect to the vertical so as to have a diameter at which the holes 20 are inserted, and to extend from each other toward the lower part when viewed from the width direction of the roadbed 4.
Are provided at both sides of the footing portion 8 in the longitudinal direction of the roadbed 4 at intervals in the width direction of the roadbed 4. In this case, the vertical dimension of the space S from the ground on which the hole 20 is excavated to the lower surface of the roadbed 4 is, for example, 2 to 3 m, and the hole 20 is, for example, 20 to 30 m in the space S restricted vertically. Drilled at a depth of
【０００８】また、細径で長さの短い鋼管１８が多数用
意される。鋼管１８の長さは、例えば、直径が１００〜
３００mm程度で長さが１〜２ｍ程度であり、いわゆるマ
イクロパイルが用いられる。前記鋼管１８は、図４に示
すように、長手方向の一方の端部に雄ねじ部２２が形成
され、他方の端部に雌ねじ部２４が形成されている。Further, a large number of small-diameter, short-length steel pipes 18 are prepared. The length of the steel pipe 18 is, for example, 100 to 100 mm in diameter.
A so-called micropile having a length of about 300 mm and a length of about 1 to 2 m is used. As shown in FIG. 4, the steel pipe 18 has a male thread 22 at one end in the longitudinal direction and a female thread 24 at the other end.
【０００９】次に、穴２０に鋼管１８が挿入される。詳
細には、前記スペースＳ内において、鋼管１８の端部の
雄ねじ部２２と雌ねじ部２４を螺合させ、鋼管１８を順
次継ぎ足しつつ穴２０に挿入していく。この場合、雄ね
じ部２２と雌ねじ部２４の結合は、ドリル等を回転駆動
する掘削機の回転駆動手段を利用することで、前記スペ
ースＳ内において人力によることなく短時間で効率良く
なされる。そして、ねじ結合された多数の鋼管１８によ
り所望の長さとされ、これにより鋼管杭１６が形成され
る。このようにして各穴２０内において鋼管杭１６が形
成されたのち、この上にフーチング部１４が設けられ、
鋼管杭１６の上端がフーチング部１４を介してフーチン
グ部８に連結され、橋脚６の基礎の補強がなされる。な
お、鋼管１８の外周面にグラウトを塗り付けつつ穴２０
に挿入したり、或は、穴２０にグラウトを充填させたの
ち、鋼管１８を穴２０に挿入する等任意であり、鋼管１
８の外周面と穴２０の壁面との間の隙間をグラウトで充
填することで地盤に対する鋼管杭１６の摩擦力が高めら
れ、また、鋼管１８の内部にグラウトを充填することで
鋼管杭１６の強度が高められる。Next, the steel pipe 18 is inserted into the hole 20. In detail, in the space S, the male screw part 22 and the female screw part 24 at the end of the steel pipe 18 are screwed together, and the steel pipe 18 is inserted into the hole 20 while sequentially adding. In this case, the coupling between the male screw portion 22 and the female screw portion 24 can be efficiently performed in a short time without using human power in the space S by using the rotation driving means of the excavator that rotationally drives a drill or the like. Then, the steel pipe pile 16 is formed to have a desired length by a number of screwed steel pipes 18. After the steel pipe pile 16 is formed in each hole 20 in this manner, the footing portion 14 is provided thereon,
The upper end of the steel pipe pile 16 is connected to the footing part 8 via the footing part 14, and the foundation of the pier 6 is reinforced. In addition, while grouting the outer peripheral surface of the steel pipe 18,
After the grout is filled in the hole 20 or the grout is filled in the hole 20, the steel pipe 18 is inserted into the hole 20.
Filling the gap between the outer peripheral surface of the steel pipe 8 and the wall surface of the hole 20 with grout increases the frictional force of the steel pipe pile 16 against the ground, and filling the grout inside the steel pipe 18 makes the steel pipe pile 16 Strength is increased.
【００１０】従って、本実施例によれば、溶接専門の作
業員を要せず、継ぎ足し作業を煩雑化することもなく、
上下に狭いスペースＳ内において、鋼管１８を継ぎ足し
つつ穴２０に効率良く挿入していくことができる。ま
た、直径が１００〜３００mm程度の細径な鋼管１８を用
いるので、地盤に穴２０を開ける掘削機として小型なも
のを用いることができ、路盤４により上下スペースが制
限された箇所において、橋脚６の基礎を補強する上で極
めて有利となり、また、増設するフーチング部１４を小
型化する上でも有利となる。また、杭挿入用の穴を掘削
する掘削機を利用して鋼管１８の継ぎ足しを機械的に行
なえるので、上下に狭いスペースＳ内に幾種類もの動力
機械を搬入することなく、鋼管１８の継ぎ足しを効率良
く行なうことができる。また、雄ねじ部２２と雌ねじ部
２４の長さを大きくすることで、溶接接合に比べて鋼管
１８の結合部の強度を十分に高めることが可能となる。
また、鋼管杭１６を斜めに打ち込むので、図１、図２に
示すように、フーチング部８の両側の鋼管杭１６の下端
間の寸法である杭の抵抗幅Ｗが杭を鉛直に打ち込む場合
に比べて大きくなり、橋脚６の基礎の補強強度を高める
上でも有利となる。Therefore, according to this embodiment, there is no need for a welding specialist, and the addition work is not complicated.
In the vertically narrow space S, the steel pipe 18 can be efficiently inserted into the hole 20 while being added. In addition, since a small-diameter steel pipe 18 having a diameter of about 100 to 300 mm is used, a small-sized excavator for drilling a hole 20 in the ground can be used. This is extremely advantageous in reinforcing the foundation of the present invention, and is also advantageous in reducing the size of the footing portion 14 to be added. In addition, since the steel pipe 18 can be mechanically added by using an excavator for excavating a hole for inserting a pile, the steel pipe 18 can be added without carrying several types of power machines into a narrow space S vertically. Can be performed efficiently. In addition, by increasing the lengths of the male screw portion 22 and the female screw portion 24, it is possible to sufficiently increase the strength of the joint portion of the steel pipe 18 as compared with welding.
In addition, since the steel pipe pile 16 is driven diagonally, as shown in FIGS. 1 and 2, when the resistance width W of the pile, which is the dimension between the lower ends of the steel pipe piles 16 on both sides of the footing portion 8, is set when the pile is driven vertically. This is advantageous in increasing the reinforcing strength of the foundation of the pier 6.
【００１１】なお、実施例では、既設のフーチング部８
の周囲に新たなフーチング部１４を増設した場合につい
て説明したが、既設のフーチング部８を切除して穴２０
を上げ、この穴２０に鋼管杭１６を挿入したのち前記切
除した部分をコンクリートで閉塞する場合にも本発明は
適用され、この場合にも前記効果が奏されることは無論
のこと、細径な鋼管１８を用いるので、フーチング部８
を切除する部分を小さくでき、フーチング部８に埋設さ
れた主筋の切除部分を最小限に抑えることができるなど
の効果も奏される。また、実施例では、フーチング部８
における路盤４の幅方向と長手方向の両側に穴２０を掘
削し鋼管杭１６を設けた場合について説明したが、路盤
４の幅方向におけるフーチング部８の両側のみに鋼管杭
１６を設ける場合にも本発明は無論適用される。In the embodiment, the existing footing unit 8 is used.
Has been described in the case where a new footing portion 14 is added around the periphery, but the existing footing portion 8 is cut off and the hole 20 is removed.
The present invention is also applied to the case where the steel pipe pile 16 is inserted into the hole 20 and then the cut portion is closed with concrete. In this case, the above-described effect can be obtained. Since the steel pipe 18 is used, the footing 8
The size of the portion to be cut can be reduced, and the cut portion of the main muscle buried in the footing portion 8 can be minimized. In the embodiment, the footing unit 8
Although the case where the steel pipe pile 16 is provided by digging the holes 20 on both sides in the width direction and the longitudinal direction of the roadbed 4 has been described, the case where the steel pipe pile 16 is provided only on both sides of the footing portion 8 in the width direction of the roadbed 4 is also applicable. The invention applies, of course.
【００１２】[0012]
【発明の効果】以上の説明で明らかなように本発明は、
地盤に設置され杭により支持されたフーチング部と、こ
のフーチング部から立設された柱と、この柱で支持され
た路盤を有する高架道路の橋脚の基礎を補強する方法で
あって、直径が１００〜３００mm程度、長さが１〜２メ
ートル程度で、かつ、その長手方向の一方の端部に雄ね
じ部が形成され、他方の端部に雌ねじ部が形成された多
数の細径で短い鋼管を用意し、前記路盤の幅方向におけ
るフーチング部の両側箇所から、前記鋼管が挿入される
直径で下部に至るにつれて互いに間隔が広がるようにそ
れぞれ鉛直に対して斜めに穴を掘削し、このような穴を
路盤の幅方向におけるフーチング部の両側箇所で路盤の
長手方向に間隔をおいて複数設け、前記穴に、前記複数
の鋼管を前記雄ねじ部と雌ねじ部とを結合させつつ挿入
して鋼管杭とし、この鋼管杭の上端と前記フーチング部
を連結するようにした。そのため、溶接専門の作業員を
要せずに鋼管をねじ結合により継ぎ足しつつ穴に効率良
く挿入していくことができ、また、直径が１００〜３０
０mm程度の細径な鋼管を杭に用いるので、地盤に穴を開
ける掘削機として小型なものを用いることができ、路盤
下方の上下スペースが制限された箇所において橋脚の基
礎を補強する上で極めて有利となる。また、ねじ結合に
より鋼管を継ぎ足していくので、杭挿入用の穴を掘削す
る掘削機を利用して鋼管の継ぎ足しを機械的に行なえ、
また、雄ねじ部と雌ねじ部の長さを大きくすることで、
鋼管の結合部の強度に優れた鋼管杭により基礎を補強で
き、また、増設する杭の抵抗幅が、杭を鉛直に打ち込む
場合に比べて大きくなり、橋脚の基礎の補強強度を高め
る上でも有利となる。As is clear from the above description, the present invention
A method of reinforcing a footing part installed on the ground and supported by a pile, a pillar erected from the footing part, and a pier foundation of an elevated road having a roadbed supported by the pillar, having a diameter of 100 A number of small and short steel pipes having a length of about 300 mm, a length of about 1 to 2 meters, and a male thread at one end in the longitudinal direction and a female thread at the other end. Prepare and drill holes diagonally to the vertical so that the steel pipes are inserted from both sides of the footing portion in the width direction of the roadbed in such a way that the distance from the bottom to the lower part is widened toward the lower part. A plurality of steel pipes are provided at both sides of the footing portion in the width direction of the roadbed at intervals in the longitudinal direction of the roadbed, and the plurality of steel pipes are inserted into the holes while coupling the male screw portion and the female screw portion with each other to form a steel pipe pile. , The upper end of the steel pipe pile that so as to connect the footing portion. Therefore, it is possible to efficiently insert the steel pipe into the hole while adding a steel pipe by screw connection without requiring a welding specialist, and the diameter is 100 to 30.
Because a steel pipe with a diameter of about 0 mm is used for the pile, a small excavator that drills holes in the ground can be used, and it is extremely necessary to reinforce the pier foundation in places where the vertical space below the roadbed is limited. This is advantageous. In addition, since the steel pipe is added by screw connection, the addition of the steel pipe can be performed mechanically using an excavator that excavates holes for pile insertion,
Also, by increasing the length of the male thread and female thread,
The foundation can be reinforced by steel pipe piles with excellent strength at the joints of steel pipes, and the resistance width of additional piles is greater than when piles are driven vertically, which is also advantageous in increasing the reinforcement strength of pier foundations. Becomes
【図１】高架道路の橋脚のフーチング部の支持状態の正
面図である。FIG. 1 is a front view of a footing portion of a pier on an elevated road in a supported state.
【図２】高架道路の橋脚のフーチング部の支持状態の側
面図である。FIG. 2 is a side view of a footing portion of a bridge pier on an elevated road in a supported state.
【図３】高架道路の橋脚のフーチング部の支持状態の平
面図である。FIG. 3 is a plan view showing a state where a footing portion of a pier of an elevated road is supported.
【図４】鋼管の要部断面図である。FIG. 4 is a sectional view of a main part of a steel pipe.
２ 高架道路 ６ 橋脚 ８、１４ フーチング部 １６ 鋼管杭 １８ 鋼管 ２０ 穴 ２２ 雄ねじ部 ２４ 雌ねじ部 2 Elevated Road 6 Bridge Pier 8, 14 Footing 16 Steel Pipe Pile 18 Steel Pipe 20 Hole 22 Male Thread 24 Female Thread
Claims (2)
チング部と、このフーチング部から立設された柱と、こ
の柱で支持された路盤を有する高架道路の橋脚の基礎を
補強する方法であって、 直径が１００〜３００mm程度、長さが１〜２メートル程
度で、かつ、その長手方向の一方の端部に雄ねじ部が形
成され、他方の端部に雌ねじ部が形成された多数の細径
で短い鋼管を用意し、 前記路盤の幅方向におけるフーチング部の両側箇所か
ら、前記鋼管が挿入される直径で下部に至るにつれて互
いに間隔が広がるようにそれぞれ鉛直に対して斜めに穴
を掘削し、 このような穴を路盤の幅方向におけるフーチング部の両
側箇所で路盤の長手方向に間隔をおいて複数設け、 前記穴に、前記複数の鋼管を前記雄ねじ部と雌ねじ部と
を結合させつつ挿入して鋼管杭とし、 この鋼管杭の上端と前記フーチング部を連結するように
した、 ことを特徴とする高架道路用橋脚の基礎の補強方法。1. A method for reinforcing a foundation of a pier of an elevated road having a footing portion installed on the ground and supported by a pile, a pillar erected from the footing portion, and a roadbed supported by the pillar. A large number of fine threads having a diameter of about 100 to 300 mm, a length of about 1 to 2 meters, and a male thread formed at one end in the longitudinal direction and a female thread formed at the other end. A steel pipe having a short diameter is prepared.From both sides of the footing portion in the width direction of the roadbed, holes are cut diagonally with respect to the vertical so that the steel pipe is inserted into the lower portion at a diameter where the steel pipe is inserted. A plurality of such holes are provided at both sides of the footing portion in the width direction of the roadbed at intervals in the longitudinal direction of the roadbed, and the plurality of steel pipes are inserted into the holes while connecting the male screw portion and the female screw portion. I A method for reinforcing a foundation of an elevated road pier, wherein a steel pipe pile is connected to an upper end of the steel pipe pile and the footing portion.
部の両側箇所からも前記鋼管が挿入される直径で下部に
至るにつれて互いに間隔が広がるようにそれぞれ鉛直に
対して斜めに穴を掘削し、このような穴を路盤の長手方
向におけるフーチング部の両側箇所で路盤の幅方向に間
隔をおいて複数設け、前記穴に、前記複数の鋼管を前記
雄ねじ部と雌ねじ部とを結合させつつ挿入して鋼管杭と
し、この鋼管杭の上端と前記フーチング部を連結するよ
うにしたことを特徴とする請求項１記載の高架道路用橋
脚の基礎の補強方法。2. Drilling holes obliquely with respect to the vertical so that the steel pipes are inserted from both sides of the footing portion in the longitudinal direction of the roadbed in such a way that the steel pipes are inserted into the lower portion of the footing and the space extends toward the lower part. A plurality of holes are provided at both sides of the footing portion in the longitudinal direction of the roadbed at intervals in the width direction of the roadbed, and the plurality of steel pipes are inserted into the holes while the male screw portion and the female screw portion are joined. 2. The method of reinforcing an elevated road pier foundation according to claim 1, wherein the pile is a pile, and an upper end of the steel pipe pile is connected to the footing portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7071097A JPH10252080A (en) | 1997-03-07 | 1997-03-07 | Method for reinforcing foundation of pier for high level road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7071097A JPH10252080A (en) | 1997-03-07 | 1997-03-07 | Method for reinforcing foundation of pier for high level road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10252080A true JPH10252080A (en) | 1998-09-22 |
Family
ID=13439418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7071097A Pending JPH10252080A (en) | 1997-03-07 | 1997-03-07 | Method for reinforcing foundation of pier for high level road |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10252080A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000320152A (en) * | 1999-05-13 | 2000-11-21 | Shimizu Corp | Earthquake resistant reinforcing method and earthquake resistant reinforcing structure for existing pile foundation building |
| JP2006265844A (en) * | 2005-03-22 | 2006-10-05 | Penta Ocean Constr Co Ltd | Reinforcing structure of underwater foundation of existing structure and its reinforcing construction method |
| CN107165058A (en) * | 2017-05-08 | 2017-09-15 | 中铁上海设计院集团有限公司 | One kind is used for existing operation Bridge pier reinforcement means |
| CN113668626A (en) * | 2021-08-31 | 2021-11-19 | 中铁第四勘察设计院集团有限公司 | Bridge pier column deviation rectifying method for soft soil foundation |
-
1997
- 1997-03-07 JP JP7071097A patent/JPH10252080A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000320152A (en) * | 1999-05-13 | 2000-11-21 | Shimizu Corp | Earthquake resistant reinforcing method and earthquake resistant reinforcing structure for existing pile foundation building |
| JP2006265844A (en) * | 2005-03-22 | 2006-10-05 | Penta Ocean Constr Co Ltd | Reinforcing structure of underwater foundation of existing structure and its reinforcing construction method |
| JP4571878B2 (en) * | 2005-03-22 | 2010-10-27 | 五洋建設株式会社 | Reinforcement method for underwater foundation of existing structure |
| CN107165058A (en) * | 2017-05-08 | 2017-09-15 | 中铁上海设计院集团有限公司 | One kind is used for existing operation Bridge pier reinforcement means |
| CN107165058B (en) * | 2017-05-08 | 2019-05-21 | 中铁上海设计院集团有限公司 | One kind being used for existing operation Bridge pier reinforcement means |
| CN113668626A (en) * | 2021-08-31 | 2021-11-19 | 中铁第四勘察设计院集团有限公司 | Bridge pier column deviation rectifying method for soft soil foundation |
| CN113668626B (en) * | 2021-08-31 | 2023-08-04 | 中铁四院集团工程建设有限责任公司 | Bridge pier column deviation correcting method for soft soil foundation |
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