JP2001329545A - Bridge pier foundation construction method and floor slab for bridge pier - Google Patents

Bridge pier foundation construction method and floor slab for bridge pier

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Publication number
JP2001329545A
JP2001329545A JP2000149706A JP2000149706A JP2001329545A JP 2001329545 A JP2001329545 A JP 2001329545A JP 2000149706 A JP2000149706 A JP 2000149706A JP 2000149706 A JP2000149706 A JP 2000149706A JP 2001329545 A JP2001329545 A JP 2001329545A
Authority
JP
Japan
Prior art keywords
pile
floor slab
hole
pier
floor
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
JP2000149706A
Other languages
Japanese (ja)
Other versions
JP3486602B2 (en
Inventor
Keisuke Yamakawa
圭介 山川
Original Assignee
Yamakawa Kensetsu Kk
山川建設株式会社
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 Yamakawa Kensetsu Kk, 山川建設株式会社 filed Critical Yamakawa Kensetsu Kk
Priority to JP2000149706A priority Critical patent/JP3486602B2/en
Publication of JP2001329545A publication Critical patent/JP2001329545A/en
Application granted granted Critical
Publication of JP3486602B2 publication Critical patent/JP3486602B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a bridge pier foundation construction method and a floor slab for a bridge pier capable of markedly shortening construction term up to the completion of a foundation as compared with a conventional construction method. SOLUTION: The floor system 1 made of PC concrete and provided with a predetermined outward shape dimension and pile holes 3 in which piles 2 are inserted is formed in advance, holes 6 for installing the floor system 1 are digged in floor system installation sections, the floor slab 1 is sunk and provided in the digged holes 6, and then the piles 2 are driven down to a predetermined depth in the ground through the pile holes 3 to connect the floor system 1 with the piles 2. Consequently, construction term for digging holes is shortened, reinforcing bar construction work and form construction work for the floor system 1 in the digged holes and floor system concrete construction work become unnecessary, and construction term can be shortened.

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、橋脚基礎工法及び
橋脚用床版に係り、特に現場工期を著しく短縮できるよ
うにした橋脚基礎工法及び橋脚用床版に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pier foundation method and a pier slab, and more particularly to a pier foundation method and a pier slab capable of significantly shortening the on-site construction period.
【0002】[0002]
【従来技術】従来、車道、歩道、鉄道などの交通路を連
絡するために河川、運河、渓谷あるいは他の交通路の上
に架設される橋梁や、高架道路、高架鉄道などの高架橋
を支持する橋脚の基礎として、土中に打ち込んだPCコ
ンクリート製の杭と、この杭の杭頭に連結され、所定の
平面積と高さとを有する鉄筋コンクリート製の床版とを
備える基礎が多用されている。
2. Description of the Related Art Conventionally, bridges constructed on rivers, canals, valleys or other traffic routes for connecting traffic routes such as roadways, sidewalks, and railways, and viaducts such as elevated roads and elevated railways are supported. BACKGROUND ART As a foundation of a bridge pier, a foundation including a PC concrete pile driven into the soil and a reinforced concrete floor slab connected to a pile head of the pile and having a predetermined plane area and height is frequently used.
【0003】この種の基礎を形成する従来の橋脚基礎工
法では、例えば床版の平面積よりも広い範囲を取り囲む
ようにして鋼矢板(シートパイル)を打ち込み、その中
の所定の位置に鉄筋コンクリート製の杭(パイル)を打
ち込んでから、前記鋼矢板の内側の地面を例えば3メー
トル程度の深さまで掘削する。掘削に際しては、必要に
応じて土留め支保工が行われる。
In a conventional pier foundation method of forming this kind of foundation, a steel sheet pile (sheet pile) is driven into, for example, an area larger than a plane area of a floor slab, and reinforced concrete is placed at a predetermined position in the pile. Then, the ground inside the steel sheet pile is excavated to a depth of about 3 meters, for example. When excavating, earth retaining works are performed as necessary.
【0004】この後、この掘削穴内の所定の高さで杭頭
をはつってその鉄筋を露出させた後、掘削穴の底面に砂
利を敷き、その上に捨てコンを打設してから、捨てコン
の上に床版の鉄筋を組立てる。そして、この床版の鉄筋
の中の主筋と前記杭の鉄筋とを継ぎ、床版の型枠を組立
てた後、床版のコンクリートを打設するという手順が採
用されている。
[0004] Then, after excavating the pile head at a predetermined height in the excavation hole to expose the rebar, a gravel is laid on the bottom surface of the excavation hole, and a discarded concrete is cast on the gravel. Assemble the floor reinforcement on the discarded concrete. Then, a procedure is adopted in which the main reinforcement in the reinforcing bar of the floor slab and the reinforcing steel of the pile are connected, a formwork of the floor slab is assembled, and concrete of the floor slab is poured.
【0005】又、この種の基礎に橋脚を立上げる方法と
しては、この後、橋脚用の鉄筋を組立て、床版から突出
させたこの床版の主筋と橋脚用の鉄筋を例えば圧接など
によって継いだ後、橋脚用の鉄筋の周囲に橋脚用の型枠
を組立て、この型枠の中にコンクリートを打設する方法
が採用されている。
Further, as a method of erecting a pier on this type of foundation, a reinforcing bar for a pier is then assembled, and a main reinforcing bar of the slab protruding from the slab and a reinforcing bar for the pier are connected by, for example, pressure welding. After that, a method of assembling a formwork for the pier around the reinforcing steel for the pier and casting concrete in the formwork is adopted.
【0006】なお、このようにして橋脚を立上げた後、
掘削穴に土砂を埋戻し、鋼矢板が撤去される。
After the pier is set up in this way,
The excavation hole is backfilled with earth and sand, and the steel sheet pile is removed.
【0007】又、前記掘削穴の深さは、曲げモーメン
ト、静荷重、動荷重などの基礎に作用する荷重と安全率
とを考慮して、荷重物の影響を受けないような基礎構造
とするために必要とされる約3メートルとなる。
Further, the depth of the excavation hole is set to a foundation structure which is not affected by the load in consideration of a load acting on the foundation such as a bending moment, a static load, a dynamic load and a safety factor. It is about 3 meters required for this.
【0008】[0008]
【発明が解決しようとする課題】この従来工法によれ
ば、施工現場における工数が非常に多く、着工から基礎
の完成までに2カ月程度の長い工期が必要とされ、その
上に橋脚を立上げるためには更に長い工期が必要になる
という技術的課題がある。
According to this conventional construction method, the number of steps at the construction site is extremely large, and a long construction period of about two months is required from the start of construction to the completion of the foundation, and a pier is set up thereon. For this purpose, there is a technical problem that a longer construction period is required.
【0009】本発明は、このような事情を鑑みて、かか
る従来技術の課題を解決し、現場工期を著しく短縮でき
るようにした橋脚基礎工法及び橋脚用床版を提供するこ
とを目的として提案されたものである。
In view of such circumstances, the present invention has been proposed with the object of solving the problems of the prior art and providing a pier foundation method and a pier slab that can significantly reduce the on-site construction period. It is a thing.
【0010】[0010]
【課題を解決するための手段】この目的を達成するた
め、本発明に係る橋脚基礎工法(以下、本発明方法とい
う。)は、所定の外形寸法を備えるとともに、杭を挿通
する杭孔が予め形成された床版を予め形成しておき、床
版設置箇所に該床版を設置する掘削穴を掘削した後、こ
の掘削穴に前記床版を沈設してから、前記杭孔を通して
杭を所定の深さまで地中に打ち込み、又は前記杭を打ち
込んでから、その杭頭が前記杭穴に挿通されるように前
記掘削穴に前記床版を沈設し、更にこの後、床版と杭と
を連結するという技術的手段を採用する。
In order to achieve this object, a pier foundation method according to the present invention (hereinafter referred to as the method of the present invention) is provided with a predetermined external dimension and a hole for inserting a pile in advance. After the formed floor slab is formed in advance and a digging hole for installing the floor slab is excavated at the floor slab installation location, the floor slab is sunk in the digging hole, and a pile is passed through the pile hole to a predetermined height. Into the ground, or after driving the pile, the floor slab is sunk in the excavation hole so that the pile head is inserted into the pile hole, and thereafter, the floor slab and the pile are The technical means of connection is adopted.
【0011】この方法によると共に、床版の製作で所定
の材料と内部構造を採用すれば、この床版を設置するた
めの掘削穴の深さは構造計算上、約1メートル程度で十
分であり、多くの場合には周囲に鋼矢板を打ち込む必要
がなくなる。又、掘削穴の底面と床版との間には、例え
ばグラウトを注入して隙間を埋めることにより床版を掘
削穴底に馴染ませることができ、砂利を敷く必要はなく
なる。更に、掘削穴内での床版の鉄筋や型枠の設置、床
版コンクリ−ト工事、型枠撤去などの時間を省略でき
る。その結果、着工から約10日という短期間で橋脚礎
を完成できるようになったのである。
According to this method and if a predetermined material and an internal structure are adopted in the production of the floor slab, the depth of the excavation hole for installing the floor slab is about 1 meter from the structural calculation. In many cases, there is no need to drive steel sheet pile around. In addition, by filling the gap between the bottom surface of the excavation hole and the floor slab, for example, by injecting grout, the floor slab can be adapted to the bottom of the excavation hole, and there is no need to lay gravel. Further, it is possible to omit the time required for installing the reinforcing steel bar and the formwork in the excavation hole, performing the concrete work for the floor slab, and removing the formwork. As a result, the pier foundation could be completed in about 10 days from the start of construction.
【0012】次に、本発明に係る床版は、前記目的を達
成するため、所定の外形寸法を備えるとともに、所定の
位置に杭を挿通する杭孔が予め形成されて、更にこの杭
孔の形状を杭の突き抜けを防止する所定の形状とする、
という技術的手段を採用する。
Next, in order to achieve the above object, the floor slab according to the present invention is provided with a predetermined external dimension, and a stake hole for inserting a stake in a predetermined position is formed in advance. Make the shape a predetermined shape to prevent the pile from piercing,
It adopts the technical means of:
【0013】この床版によれば、施工現場に床版の高さ
程度、例えば1メートル程度の掘削穴を掘った後、前記
掘削穴にこの床版を沈設してから杭孔を通して地中に杭
基礎を打ち込み、又は、前記掘削穴に杭を打ち込んでか
ら、杭頭が前記杭穴に挿通されるように前記掘削穴にこ
の床版を沈設し、更にこの後、床版と杭とを連結すると
いう前記本発明方法を実施することができ、もって、上
述のように短期間で橋脚用の基礎を完成することができ
る。
According to this floor slab, after digging a digging hole of about the height of the slab, for example, about 1 meter, at the construction site, the slab is sunk in the digging hole, and then put into the ground through the pile hole. After driving a pile foundation or driving a pile into the excavation hole, the floor slab is sunk in the excavation hole so that a pile head is inserted into the pile hole, and thereafter, the floor slab and the pile are connected. It is possible to carry out the method of the present invention of connecting, and thus to complete a foundation for a pier in a short time as described above.
【0014】[0014]
【発明の実施の形態】本発明の一実施例に係る橋脚用床
版を用いる本発明方法の一実施例を図面に基づいて具体
的に説明すれば、以下の通りである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method of the present invention using a slab for a pier according to one embodiment of the present invention will be specifically described below with reference to the drawings.
【0015】図2の斜視図に示すように、本発明の一実
施例に係る橋脚用床版1は、下記の材料と内部構造を採
用する。つまり、この橋脚用床版1は、鉄筋を主筋12
とし、補助筋としてピアノ線を用いたプレキャストコン
クリート(PCコンクリート)製であり、例えば長さ6
メートル、幅3メートル、高さ1メートル程度の直方形
に形成され、その中心から等距離を隔てた4箇所に後述
する杭2を挿通する杭孔3を上下方向に貫通させてあ
る。又、この床版1の中央上面に橋脚鉄筋と連結される
主筋12を突出させてある。
As shown in the perspective view of FIG. 2, a pier deck 1 according to an embodiment of the present invention employs the following materials and internal structure. In other words, this pier floor slab 1 uses the reinforcing bars 12
It is made of precast concrete (PC concrete) using a piano wire as an auxiliary muscle.
It is formed in a rectangular shape having a width of about 3 meters and a height of about 1 meter, and is vertically penetrated at four locations equidistant from the center thereof, through which a pile 2 described later is inserted. A main reinforcing bar 12 connected to the pier reinforcing bar is projected from the center upper surface of the floor slab 1.
【0016】図3の断面図に示すように、この床版1の
下面に、この床版1と一体にプレキャストされた4つの
カラー11が突設され、前記杭孔3は床版1とこのカラ
ー11とを貫通するように形成されている。
As shown in the sectional view of FIG. 3, four collars 11 precast integrally with the floor slab 1 are protruded from the lower surface of the floor slab 1, and the pile holes 3 are formed by the floor slab 1 and the It is formed so as to penetrate the collar 11.
【0017】各杭孔3は、杭2の突き抜け防止のために
ここでは床版1の上面からカラー11内にかけて円錐台
形に形成して、また杭孔3のこの円錐台形の部分に床版
1の主筋12を露出させてある。
Each of the pile holes 3 is formed in a truncated cone shape from the upper surface of the floor slab 1 to the inside of the collar 11 in order to prevent the pile 2 from penetrating. Is exposed.
【0018】杭孔3を円錐台形に形成して杭孔3内に主
筋12を露出させる方法としては、工事現場で杭孔3の
周囲をはつるという方法を採用してもよいが、現場工事
の工期を短縮するため、予め工場で杭孔3の周囲をはつ
るという方法を採用したり、床版1の杭孔3の型枠とし
て、補助筋を挿通する孔を形成した円筒形、円錐台形な
どの筒形の捨て型枠を用い、この型枠の孔に挿通した補
助筋の一端を床版1の主筋12に連結するとともに、そ
の他端を型枠内に突出させる方法を採用している。
As a method of exposing the main reinforcement 12 in the pile hole 3 by forming the pile hole 3 in a truncated conical shape, a method of hanging around the pile hole 3 at a construction site may be adopted. In order to shorten the construction period, a method of previously hanging around the pile hole 3 at the factory is adopted, or as a formwork of the pile hole 3 of the floor slab 1, a cylindrical or conical hole having a hole through which an auxiliary muscle is inserted is formed. A method is used in which a tubular discarded form such as a trapezoid is used, one end of an auxiliary muscle inserted into a hole of this form is connected to the main reinforcement 12 of the floor slab 1, and the other end is projected into the form. I have.
【0019】図1に示すように、本発明方法の一実施例
に係る橋脚基礎工法では、前記床版1の周囲の例えば幅
500センチメートルの余堀を含めた掘削穴6を、前記
床版1の高さと同じ深さに掘削した後、この掘削穴6に
前記床版1を例えばクレーンなどによって吊り下ろして
設置する。
As shown in FIG. 1, in the pier foundation method according to one embodiment of the method of the present invention, a digging hole 6 around the floor slab 1 including an overhang having a width of, for example, 500 cm is inserted into the floor slab. After excavating to the same depth as the height of the floor 1, the floor slab 1 is suspended and installed in the excavation hole 6 by, for example, a crane.
【0020】この実施例では、掘削穴6の底面には、必
要に応じて、地下水対策のための栗石7が敷き詰めら
れ、栗石7と床版1の底面との間に捨てコン8を打設し
ているが、栗石7及び捨てコン8を省略し、必要に応じ
て掘削穴6の底面と床版1との間にグラウトを流し込む
だけであってもよい。
In this embodiment, if necessary, a rock stone 7 is spread on the bottom surface of the excavation hole 6 as a countermeasure against groundwater, and a discard concrete 8 is cast between the rock stone 7 and the bottom surface of the floor slab 1. However, it is also possible to omit the rubble stone 7 and the waste container 8 and to just pour grout between the bottom surface of the excavation hole 6 and the floor slab 1 as necessary.
【0021】この後、前記杭穴3を通して、例えばベノ
ト工法などの低騒音工法に従ってPCコンクリート製の
杭(パイル)2を土中に打ち込む。
Thereafter, a pile (pile) 2 made of PC concrete is driven into the soil through the pile hole 3 according to a low-noise construction method such as a Venoto construction method.
【0022】即ち、前記杭穴3を通してアースオーガな
どにより所定の深さまで杭穴を掘削し、この杭穴に必要
に応じてケーシング21を沈設し、更に、円筒かご状な
いし円筒網状(ここでは内外二重かご状)の鉄筋22を
挿入した後、杭コンクリート23を打ち込む。なお、鉄
筋22はケーシング21の上方まで延設して、杭2の上
方に鉄筋22が露出するようにしておく。又、ケーシン
グ21と杭孔3との隙間に、杭コンクリート23の打ち
込みと同時に捨てコンクリートを打ち込んで、この隙間
を埋めておく。
That is, a pit hole is excavated to a predetermined depth by an earth auger or the like through the pit hole 3, a casing 21 is laid in the pit hole as required, and further a cylindrical cage or a cylindrical mesh (in this case, inside and outside) is formed. After the rebar 22 (double cage shape) is inserted, the pile concrete 23 is driven. In addition, the reinforcing bar 22 extends to above the casing 21 so that the reinforcing bar 22 is exposed above the pile 2. In addition, at the same time as the pile concrete 23 is driven in, the discarded concrete is driven into the gap between the casing 21 and the pile hole 3 to fill this gap.
【0023】もちろん、杭打工法は前記ベノト工法に限
定されるものではなく、PCコンクリート製のパイルを
パイルハンマーで打ち込む方法など従来から公知の方法
を採用することができる。
Of course, the pile driving method is not limited to the above-mentioned benot method, and a conventionally known method such as a method of driving a pile made of PC concrete with a pile hammer can be adopted.
【0024】この杭打ちが終了した後、前記床版1の主
筋12と杭2の鉄筋22とを継ぐ。床版1の主筋12と
杭2の鉄筋22とを継ぐ方法は、特に限定されず、杭打
工法に対応して適当な方法を採用すればよく、ここで
は、予め杭孔3の周囲を円錐台形に形成して床版1の主
筋12を露出させておき、この杭孔3に突出させた床版
1の主筋12に、杭頭の上方に延出させた杭2の鉄筋2
2を継筋13を介して継ぐ方法を採用している。
After the pile driving is completed, the main reinforcing bar 12 of the floor slab 1 and the reinforcing bar 22 of the pile 2 are connected. The method of joining the main reinforcing bar 12 of the floor slab 1 and the reinforcing bar 22 of the pile 2 is not particularly limited, and an appropriate method corresponding to the pile driving method may be adopted. The main reinforcement 12 of the floor slab 1 is exposed by exposing the main reinforcement 12 of the floor slab 1 into the trapezoidal shape, and the reinforcement 2 of the pile 2 extended above the pile head is inserted into the main reinforcement 12 of the floor slab 1 protruding from the pile hole 3.
2 is connected via a connecting bar 13.
【0025】なお、PCコンクリート製のパイルをパイ
ルハンマーで打ち込む方法などを採用する場合には、杭
打ちの終了後、杭頭をはつって杭2の鉄筋22を露出さ
せ、予め杭孔3内に露出させておいた床版1の主筋12
とこの杭2の鉄筋22とを連結させる。
When a method of driving a pile made of PC concrete with a pile hammer or the like is employed, after the pile driving is completed, the reinforcing bar 22 of the pile 2 is exposed by removing the pile head, and the inside of the pile hole 3 is previously formed. Main bar 12 of floor slab 1 exposed to
And the reinforcing bar 22 of the pile 2 are connected.
【0026】又、床版1の主筋12と杭2の鉄筋22と
を継ぐ他の方法としては、床版1の上面に主筋12に連
結したアンカーを突設し、このアンカーと杭2の鉄筋2
2とを例えば番線などにより継ぐ方法などがある。
As another method of joining the main reinforcing bar 12 of the floor slab 1 and the reinforcing bar 22 of the pile 2, an anchor connected to the main reinforcing bar 12 is protruded on the upper surface of the floor slab 1, and the anchor and the reinforcing bar of the pile 2 are protruded. 2
For example, there is a method of connecting 2 with a line or the like.
【0027】さて、床版1の主筋12と杭2の鉄筋22
と連結した後、杭孔3にコンクリートミルク14を流し
込み、硬化させることにより床版1と杭2との結合が完
了する。着工から床版1と杭2との結合が完了するま
で、即ち、基礎が完成するまでの工期は、掘削穴6が浅
く、掘削穴6を掘るために要する工期が短縮されたこ
と、掘削穴6内での床版1の鉄筋工事、型枠工事、床版
コンクリート打設工事、床版コンクリートの養生、及び
型枠撤去工事の工期が不要になったことなどの理由によ
り、非常に短縮され、着工後わずか10日間で基礎を完
成することができた。
Now, the main reinforcement 12 of the floor slab 1 and the reinforcement 22 of the pile 2
After the connection, the concrete milk 14 is poured into the pile hole 3 and hardened, whereby the connection between the floor slab 1 and the pile 2 is completed. From the start of construction until the joint between the floor slab 1 and the pile 2 is completed, that is, until the foundation is completed, the excavation hole 6 is shallow, and the construction period required for excavating the excavation hole 6 has been shortened. Due to the fact that the rebar work of the slab 1 in 6, the formwork construction, the concrete placement of the slab, the curing of the concrete slab, and the removal of the formwork are no longer required, The foundation was completed in only 10 days after the start of construction.
【0028】栗石の敷設、捨てコンの打設など掘削穴6
の底面処理を省略できる場合には、更に1〜3日の工期
短縮が可能になる。
Excavation hole 6 for laying chestnut stone, placing dumping concrete, etc.
If the bottom surface treatment can be omitted, the construction period can be further shortened by one to three days.
【0029】床版1と杭2とを連結している間に、ある
いは、床版1と杭2とを連結した後に、予め床版1の中
央部上面に床版1の主筋12を突出させておき、この床
版1の主筋12に橋脚4の鉄筋を継ぐ。ここで、床版1
の中央部上面に、この床版1の主筋12に連結されたア
ンカーを突出させて、この床版1のアンカーに橋脚4の
鉄筋を継ぐようにしてもよい。そして、床版1の上に脚
柱9の型枠を組立て、更に、橋桁10の鉄筋と型枠とを
組立てた後、これら型枠の中にコンクリートを打設し、
養生する。
While the floor slab 1 and the pile 2 are connected, or after the floor slab 1 and the pile 2 are connected, the main reinforcement 12 of the floor slab 1 is projected in advance on the upper surface of the center of the floor slab 1. In advance, the reinforcing bar of the pier 4 is connected to the main reinforcing bar 12 of the floor slab 1. Here, floor slab 1
An anchor connected to the main reinforcing bar 12 of the floor slab 1 may be protruded from the upper surface of the central part of the floor slab 1 to connect the reinforcing bar of the pier 4 to the anchor of the floor slab 1. After assembling the formwork of the pillar 9 on the floor slab 1 and further assembling the reinforcing bar of the bridge girder 10 and the formwork, concrete is poured into these formwork,
Cure.
【0030】橋脚4のコンクリートが十分に硬化した
後、橋脚4の型枠を撤去し、床版1の周囲の余堀などに
土砂を埋め戻す。更に、複数の橋脚4にわたって例えば
道床30が架設され、その下方の地面及び床版1の上に
は地上道路31が建設される。
After the concrete of the pier 4 is sufficiently hardened, the formwork of the pier 4 is removed, and the earth and sand is buried in the overhang around the slab 1. Further, for example, a roadbed 30 is erected over the plurality of piers 4, and a ground road 31 is constructed below the ground and on the floor slab 1.
【0031】床版1と橋脚4とを連結する方法は、この
実施例の方法に限定されることはなく、例えば、予め、
床版1の中央部に橋脚4の脚柱9の鉄筋を挿入する凹部
を、橋脚4よりも大径にかつ所定の深さに形成してお
く。更に、この凹部からは、床版1の主筋12を露出さ
せておく。そして、この凹部に橋脚4の脚柱9の鉄筋を
挿入し、床版1の主筋12と脚柱9の鉄筋とを継いだ
後、橋脚4の型枠を組立て、橋脚4のコンクリートを打
設する方法を採用してもよい。
The method of connecting the floor slab 1 and the pier 4 is not limited to the method of this embodiment.
At the center of the floor slab 1, a concave portion for inserting the reinforcing bar of the pillar 9 of the pier 4 is formed to have a diameter larger than that of the pier 4 and a predetermined depth. Further, the main bar 12 of the floor slab 1 is exposed from the recess. Then, the reinforcing bars of the pillars 9 of the pier 4 are inserted into the recesses, and the main bars 12 of the floor slab 1 and the reinforcing bars of the pillars 9 are connected. Then, the formwork of the pier 4 is assembled, and the concrete of the pier 4 is poured. May be adopted.
【0032】なお、この実施例では、上述した方法で床
版1と杭2とを連結しているが、これらを連結する方法
はこの実施例によって限定されるものでばない。
In this embodiment, the floor slab 1 and the pile 2 are connected by the above-mentioned method, but the method of connecting these is not limited to this embodiment.
【0033】又、前記一実施例では、杭2のコンクリー
トに打継がれる杭孔3内のコンクリート14が円錐台形
になるようにして杭2の突き抜けを防止しているが、杭
2の突き抜けを防止する方法はこれに限らず、例えば図
4に示すように、床版1の上面にアンカーボルト15を
立上げ、杭2の鉄筋22と床版1の主筋12とを連結
し、杭孔3にコンクリート14を打設した後、杭孔3を
覆う蓋板13に前記アンカーボルト15を挿通し、蓋板
16の上からこのアンカーボルト15に螺合させたナッ
ト17を締め込むようにしてもよいのである。
In the above-described embodiment, the concrete 14 in the pile hole 3 to be transferred to the concrete of the pile 2 has a truncated cone shape to prevent the pile 2 from penetrating. The method of preventing this is not limited to this. For example, as shown in FIG. 4, an anchor bolt 15 is raised on the upper surface of the floor slab 1, the reinforcing bar 22 of the pile 2 is connected to the main reinforcing bar 12 of the floor slab 1, and the After the concrete 14 is poured into the hole, the anchor bolt 15 may be inserted into the cover plate 13 covering the pile hole 3, and the nut 17 screwed to the anchor bolt 15 may be tightened from above the cover plate 16. is there.
【0034】更に、この実施例では床版1をPCコンク
リートで構成しているが、このPCコンクリートの型枠
とともに用いてもよい。又、この他に鋼板、鋼塊などの
金属で構成したものを用いてもよいのである。
Further, in this embodiment, the floor slab 1 is made of PC concrete, but it may be used together with this PC concrete form. In addition, a material made of metal such as a steel plate or a steel ingot may be used.
【0035】[0035]
【発明の効果】以上説明したように、本発明の橋脚用床
版は、所定の外形寸法を備えるとともに、所定の位置に
杭を挿通する杭孔が形成されているので、構造計算上、
床版の高さと同程度の深さの穴を掘削し、その中にこの
床版を設置した後、前記杭穴を通して杭を土中に打ち込
み、この杭と床版とを連結することにより、従来に比べ
て基礎を完成するまでの工期を著しく短縮することがで
きる。そして、この床版の杭孔の形状を杭の突き抜け防
止のための形状にできるため、この床版にかかる重力や
上方よりの衝撃力に対する耐力が大きくなる。
As described above, the bridge pier slab of the present invention has a predetermined outer dimension and is formed with a pile hole for inserting a pile at a predetermined position.
By digging a hole of the same depth as the height of the floor slab, installing this floor slab therein, driving a pile into the soil through the pile hole, and connecting the pile and the floor slab, The time required for completing the foundation can be significantly reduced as compared with the conventional case. And since the shape of the pile hole of this floor slab can be made into the shape for preventing the pile from piercing, the proof strength against the gravity applied to this floor slab and the impact force from above is increased.
【0036】又、本発明方法に係る橋脚基礎工法は、所
定の外形寸法を備えるとともに、杭を挿通する杭孔が形
成されたPCコンクリート製の床版を予め形成してお
き、床版設置箇所に該床版を設置する掘削穴を掘削し、
この掘削穴に前記床版を沈設してから、前記杭孔を通し
て杭を所定の深さまで地中に打ち込み、この後、床版と
杭とを連結するという手順を採用するので、掘削穴を掘
るために要する工期が短縮され、又、掘削穴の底面処
理、掘削穴内での床版の鉄筋工事、型枠工事及び型枠撤
去工事などの工期が不要になり、基礎を完成するまでの
工期を従来に比べて著しく短縮することができる、とい
う効果を得ることができる。
Further, in the bridge pier foundation method according to the method of the present invention, a PC concrete floor slab having a predetermined external dimension and a pile hole for inserting a pile is formed in advance, and a floor slab installation location is provided. Drilling a drill hole to install the floor slab in
After sinking the floor slab in this excavation hole, the pile is driven into the ground through the pile hole to a predetermined depth, and thereafter, the procedure of connecting the floor slab and the pile is adopted, so that the excavation hole is dug. The required construction time is shortened, and the time required for the foundation to be completed is eliminated, as the time required for bottom surface treatment of the excavation hole, rebar construction of the floor slab in the excavation hole, formwork construction and formwork removal work becomes unnecessary. The effect can be obtained that it can be significantly reduced as compared with the related art.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明方法の手順を説明する説明図である。FIG. 1 is an explanatory diagram illustrating the procedure of the method of the present invention.
【図2】本発明の橋脚用床版の斜視図である。FIG. 2 is a perspective view of a slab for a pier according to the present invention.
【図3】本発明の要部の断面図である。FIG. 3 is a sectional view of a main part of the present invention.
【図4】本発明の要部の断面図である。FIG. 4 is a sectional view of a main part of the present invention.
【符号の説明】[Explanation of symbols]
1 床版 2 杭 3 杭孔 4 橋脚 6 掘削穴 7 栗石 8 捨てコン 9 脚柱 10 橋桁 30 道床 31 地上道路 DESCRIPTION OF SYMBOLS 1 Floor slab 2 Pile 3 Pile hole 4 Bridge pier 6 Excavation hole 7 Kuriishi 8 Discarded concrete 9 Pillar 10 Bridge girder 30 Roadbed 31 Ground road

Claims (5)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 所定の外形寸法を備えるとともに、杭を
    挿通する杭孔が予め形成されている床版を予め形成して
    おき、床版設置箇所に該床版を設置する掘削穴を掘削し
    た後、この掘削穴に前記床版を沈設してから、前記杭孔
    を通して杭を所定の深さまで地中に打ち込み、又は、地
    中に杭を打ち込んでから、その杭頭が前記杭穴に挿通さ
    れるように前記掘削穴に前記床版を沈設し、更にこの
    後、床版と杭とを連結することを特徴とする橋脚基礎工
    法。
    1. A floor slab having a predetermined external dimension and a pile hole through which a pile is inserted is formed in advance, and an excavation hole for installing the floor slab is excavated at a floor slab installation location. Then, after the floor slab is sunk in the excavation hole, the pile is driven into the ground through the pile hole to a predetermined depth, or the pile is driven into the ground, and the pile head is inserted into the pile hole. A pier foundation method, wherein the floor slab is sunk in the digging hole so that the slab is connected to the pile.
  2. 【請求項2】 所定の外形寸法を備えるとともに、所定
    の位置に杭を挿通する杭孔が予め形成されている橋脚用
    床版。
    2. A bridge pier slab having a predetermined external dimension and having a pile hole for inserting a pile at a predetermined position in advance.
  3. 【請求項3】 前記杭孔を杭よりも大径に形成し、該杭
    孔内に主筋を突出させた請求項2に記載の橋脚用床版。
    3. The pier deck according to claim 2, wherein the pile hole is formed to have a diameter larger than that of the pile, and a main bar is projected into the pile hole.
  4. 【請求項4】 前記杭孔の形状を、杭の突き抜けを防止
    する所定の形状とした請求項2に記載の橋脚用床版。
    4. The pier slab according to claim 2, wherein the shape of the pile hole is a predetermined shape for preventing the pile from penetrating.
  5. 【請求項5】 中央部上面に橋脚鉄筋と連結される、主
    筋或いは該主筋に連結されたアンカーを突出させた請求
    項2又は3に記載の橋脚用床版。
    5. The slab for a pier according to claim 2, wherein a main bar connected to the pier reinforcing bar or an anchor connected to the main bar is projected from an upper surface of the central portion.
JP2000149706A 2000-05-22 2000-05-22 Pier foundation method and pier foundation structure Expired - Fee Related JP3486602B2 (en)

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JP2000149706A JP3486602B2 (en) 2000-05-22 2000-05-22 Pier foundation method and pier foundation structure

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005290898A (en) * 2004-04-02 2005-10-20 Yamakawa Kensetsu Kk Bridge pier construction method and bridge pier
KR100620746B1 (en) 2004-12-01 2006-09-12 두산중공업 주식회사 Constructing Method for Pipe Supporting Concrete Structure
JP2007197975A (en) * 2006-01-25 2007-08-09 Taisei Corp Structure and method for connecting pile head part and precast girder together
JP2014201944A (en) * 2013-04-04 2014-10-27 東京パワーテクノロジー株式会社 Floor slab unit and pavement structure using the same
WO2014193023A1 (en) * 2013-05-30 2014-12-04 Kim Tae Hee Housing bracket for constructing foundation of underwater bridge support and method for constructing foundation of underwater bridge support using same
JP2018003474A (en) * 2016-07-04 2018-01-11 大成建設株式会社 Structure for rigidly connecting concrete foundation and pile
CN109281258A (en) * 2018-11-02 2019-01-29 董小瑞 A kind of bracing means of Reinforced Concrete Bridge and floorings

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005290898A (en) * 2004-04-02 2005-10-20 Yamakawa Kensetsu Kk Bridge pier construction method and bridge pier
KR100620746B1 (en) 2004-12-01 2006-09-12 두산중공업 주식회사 Constructing Method for Pipe Supporting Concrete Structure
JP2007197975A (en) * 2006-01-25 2007-08-09 Taisei Corp Structure and method for connecting pile head part and precast girder together
JP2014201944A (en) * 2013-04-04 2014-10-27 東京パワーテクノロジー株式会社 Floor slab unit and pavement structure using the same
WO2014193023A1 (en) * 2013-05-30 2014-12-04 Kim Tae Hee Housing bracket for constructing foundation of underwater bridge support and method for constructing foundation of underwater bridge support using same
JP2018003474A (en) * 2016-07-04 2018-01-11 大成建設株式会社 Structure for rigidly connecting concrete foundation and pile
CN109281258A (en) * 2018-11-02 2019-01-29 董小瑞 A kind of bracing means of Reinforced Concrete Bridge and floorings
CN109281258B (en) * 2018-11-02 2019-10-08 董小瑞 A kind of bracing means of Reinforced Concrete Bridge and floorings

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