JPH04366229A - Temporary corresponding standard used for method of reverse driving construction - Google Patents

Temporary corresponding standard used for method of reverse driving construction

Info

Publication number
JPH04366229A
JPH04366229A JP3167401A JP16740191A JPH04366229A JP H04366229 A JPH04366229 A JP H04366229A JP 3167401 A JP3167401 A JP 3167401A JP 16740191 A JP16740191 A JP 16740191A JP H04366229 A JPH04366229 A JP H04366229A
Authority
JP
Japan
Prior art keywords
pile
steel
temporary
support
welded
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
JP3167401A
Other languages
Japanese (ja)
Other versions
JP2858997B2 (en
Inventor
Masahide Tanimaru
谷丸 正英
Yoshihiro Fujita
佳広 藤田
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.)
Obayashi Corp
Mitani Sekisan Co Ltd
Original Assignee
Obayashi Corp
Mitani Sekisan Co Ltd
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 Obayashi Corp, Mitani Sekisan Co Ltd filed Critical Obayashi Corp
Priority to JP3167401A priority Critical patent/JP2858997B2/en
Publication of JPH04366229A publication Critical patent/JPH04366229A/en
Application granted granted Critical
Publication of JP2858997B2 publication Critical patent/JP2858997B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To reduce the cost of a method of reverse driving construction by previously welding and connecting temporary standards made of H steel, etc., in series with the pile head of a precast pile and unifying the temporary standards and building the pile head into a pile hole. CONSTITUTION:A temporary corresponding standard 1, in which H steel 5 is welded and connected to the head of a precast PC pile 3, is built at the position of a mainly built post, and soil and sand are excavated and removed for constructing a basement. A steel-plate pedestal plate 11 fixing an anchor bolt is welded to the cut surface of the H steel 5, and the section of the H steel 5 is cut and a mainly built steel post 9 is connected and disposed in upright. A support material 13 for the standard is stretched horizontally between the H steel 5, and the mainly built steel post 9 is fixed onto the pedestal plate 11. Soil is excavated and removed up to a laying bottom level, and a foundation girder 17 is driven. Accordingly, the strength and size of the temporary standard are selected previously in conformity with aimed bearing force, thus allowing the execution of the pile having high reliability.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は地下部分構築用の支柱に
係り、仮設支柱を本設柱に転用できる逆打工法に使用す
る仮設対応支柱に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support column for constructing an underground section, and more particularly, to a support support column used in a reverse construction method that allows a temporary support support to be used as a permanent support support.

【0002】0002

【従来の技術】一般に、地階を有する建物の構築を行う
場合、予め建物全体の基礎下端まで根伐を行い、最下層
となる地階の基礎コンクリートを打設した後、漸次に地
階から地上階へと施工している。このような順打ち工法
は地下部分構築後に地上部分を構築しなければならない
ので、工期が長くなる欠点があった。そのため、最近で
は逆打工法の採用が増加している。逆打工法は、建物の
柱を立設すべき地面の所定位置に予め基礎杭を打ち、こ
の基礎杭の上に建込んだ仮設支柱の上部での地上階施工
と同時に、根伐およびコンクリート打設を地下階上層か
ら地下階下層へ向って行うものである。その際、場所打
杭(基礎杭)の上部に仮設支柱を接続し、この仮設支柱
を地下階層の柱に使用することにより、工期を著しく短
期化していた。
[Prior Art] Generally, when constructing a building with a basement, the roots are first cut down to the bottom of the foundation of the entire building, and the foundation concrete for the basement, which is the lowest level, is poured, and then gradually from the basement to the ground floor. It is being constructed. This sequential construction method had the disadvantage that the construction period was long because the above-ground section had to be constructed after the underground section was constructed. Therefore, the use of reverse pouring method has been increasing recently. In the reverse driving method, foundation piles are driven in advance at predetermined locations on the ground where building columns are to be erected, and at the same time as ground floor construction is carried out on top of temporary supports erected on top of these foundation piles, root cutting and concrete pouring are carried out. The construction is carried out from the upper basement floor to the lower basement floor. At that time, a temporary support was connected to the top of the cast-in-place pile (foundation pile), and this temporary support was used as a column for the underground floor, thereby significantly shortening the construction period.

【0003】0003

【発明が解決しようとする課題】しかし、場所打杭の形
成自体においても一定の工期がかかり、更に仮設支柱の
接続にもコストがかかることから、なお一層の工期短縮
および低コスト化の余地があった。
[Problem to be solved by the invention] However, since forming cast-in-place piles itself takes a certain amount of time, and connecting temporary supports also requires cost, there is room for further shortening of construction time and cost reduction. there were.

【0004】本発明はこのような事情に鑑みてなされた
ものであって、その目的は従来に較べなお一層の工期短
縮および低コスト化が図れる逆打工法に使用する仮設対
応支柱を提供するにある。
[0004] The present invention has been made in view of the above circumstances, and its purpose is to provide a support support for temporary construction used in the reverse pouring method, which can further shorten the construction period and reduce costs compared to the conventional method. be.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に、本発明の逆打工法に使用する仮設対応支柱は既製杭
の杭頭に、本設柱として使用可能な強度寸法をもつH形
鋼、鋼管などの仮設支柱を予め直列に溶接接続して一体
化し、これを杭穴に建て込むようにしたのである。仮設
支柱部分となるH形鋼,鋼管などの部分と既製杭である
既製PC杭との接続は前記H形鋼は既製杭の杭頭内部へ
延びるアンカー部分を有し、該既製杭の上端部において
、その主筋に溶接固定した杭頭リングに溶接接続し、あ
るいは前記鋼管は、既製杭の上端部において、その主筋
に溶接固定した杭頭リングに溶接接続したのである。
[Means for Solving the Problems] In order to achieve the above object, the temporary supporting support used in the reverse driving method of the present invention is an H-shaped support that has strength dimensions that can be used as a permanent support at the pile cap of a ready-made pile. Temporary supports made of steel, steel pipes, etc. were welded together in series in advance to form a single piece, and then these were built into the pile holes. The connection between the H-shaped steel, steel pipe, etc. that will become the temporary support part and the ready-made PC pile that is the ready-made pile is such that the H-shaped steel has an anchor part that extends into the inside of the pile head of the ready-made pile. In this case, the steel pipe was welded to a pile cap ring welded to the main reinforcement, or the steel pipe was welded to a pile cap ring welded to the main reinforcement at the upper end of the ready-made pile.

【0006】[0006]

【作用】予め仮設支柱部分を既製杭の杭頭に接続してお
いて建込むので、逆打工法に限らずアイランド工法でも
同じであるが、杭径と仮設支柱部分の材料を自由に選ん
で必要支持力に対応する。そして、仮設支柱部分の頭部
にて芯出しやレベル調整を行う。地下部分を掘削しなが
ら、仮設支柱部分は対応地下階の本設柱に使用する。し
たがって、新に既製杭に仮設支柱部分を土中にて接続す
る必要はない。
[Function] Since the temporary support section is connected to the pile cap of the ready-made pile in advance before erection, this is true not only for the reverse driving method but also for the island method, but the pile diameter and material for the temporary support section can be freely selected. Corresponds to the required supporting capacity. Then, centering and level adjustment are performed at the head of the temporary support section. While excavating the underground section, the temporary support sections will be used for permanent columns on the corresponding basement floor. Therefore, there is no need to connect the temporary support section to the new pre-fabricated pile underground.

【0007】[0007]

【実施例】以下、本発明の好適な実施例について図面を
参照にして詳細に説明する。図1乃至図4に仮設対応支
柱とその使用例を示している。ここに例示する仮設対応
支柱1は既製PC杭3(鉄骨鉄筋コンクリート,鉄筋コ
ンクリート管,鉄筋コンクリート柱等何れでもよい)の
頭に直列に仮設支柱用のH形鋼5を溶接接続したもので
ある。これは、PC杭3を建て込む前に予め現場にて接
続する。接続の詳細は図5,6で後述する。この仮設対
応支柱1を本設柱の位置にトランシットで確認しながら
調整建て込むには、最初に表面グランドレベルからオー
ガーで垂直に穴を掘る。所要目的深さの穴を掘削したな
らば、孔壁の崩壊に注意し、孔を拡大掘削しながら根固
め液を注入する。すなわち、根固め固定液7を注入充填
しながらオーガーを徐々に引き上げる。オーガー引き抜
き完了後、クローラーにて杭受器を掘削孔の中心にトラ
ンシットで精密に合せて設置する。杭打機を杭受器に乗
せ、次いで逆打ようの仮設対応支柱1をクレーンで吊り
上げ、上記掘削孔に軸方向を合せながら徐々に沈めてい
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the drawings. FIGS. 1 to 4 show temporary supports and examples of their use. The temporary supporting support column 1 illustrated here is one in which an H-shaped steel 5 for temporary support is welded in series to the head of a ready-made PC pile 3 (which may be any steel-framed reinforced concrete, reinforced concrete pipe, reinforced concrete column, etc.). This is connected in advance at the site before the PC pile 3 is erected. Details of the connection will be described later with reference to FIGS. 5 and 6. To adjust and erect this temporary supporting column 1 to the permanent column position while checking the position using a transit, first, a hole is dug vertically with an auger from the surface ground level. Once the hole has been excavated to the desired depth, inject the hardening solution while enlarging the hole, being careful not to collapse the hole wall. That is, the auger is gradually pulled up while injecting and filling the root hardening fixative 7. After the auger has been pulled out, the pile receiver is precisely aligned and installed in the center of the excavation hole using a crawler. A pile driver is placed on a pile receiver, and then a temporary supporting support column 1 for reverse driving is lifted up by a crane and gradually sunk while aligning the axial direction with the above-mentioned excavation hole.

【0008】このようにして、所定の目的位置に仮設対
応支柱1を建て込んだならば、地下階を構築するために
土砂を掘削除去する。ほぼ地下1階のフロアーレベルよ
り少し下の所まで掘り下げたならば、H形鋼5の部分を
地下1階フロアーレベルに合せてガス溶接機で切断し、
本設鉄骨柱9を接続立設する。そのために、H形鋼5の
切断面にはアンカーボルトを固定する鋼板台座プレート
11を溶接固定している。更に、仮設支柱であるH形鋼
5間に支柱用支持材13を水平に渡し、然る後に台座プ
レート11上に本設鉄骨柱9を固定している。更に、本
設鉄骨柱9の上方に地上1階部分のスラブを支える梁の
鉄骨15を接続している。次いで更に、敷底レベルまで
土を掘削除去したならば、基礎梁17を打つ。敷底は凡
そPC杭3の杭頭部分に相当するレベルになってる。基
礎梁17に基部を埋め込んで基礎梁17上に立ち上げた
柱筋19はH形鋼5の周囲を囲繞するように配筋し、支
持材13を撤去する。また、台座プレート11を埋め込
むように地下1階部分のフロアー支持用鉄筋コンクリー
ト梁(RC梁)21をH形鋼5の外周囲に打設する鉄骨
鉄筋コンクリート柱用のコンクリートと一体に打設して
いる。本設鉄骨柱9の周囲にも柱主筋を配して梁の鉄骨
15周りのコンクリートと一体に打ち、仮設支柱のH形
鋼5と本設鉄骨柱9とが一体に連続した地下部分の本設
支柱を構成している。
[0008] Once the temporary support support 1 has been erected at the predetermined target position in this manner, earth and sand are excavated and removed in order to construct an underground floor. After excavating to a point slightly below the floor level of the 1st basement floor, cut the H-section steel 5 to match the floor level of the 1st basement floor using a gas welder.
The permanent steel columns 9 are connected and erected. For this purpose, a steel plate pedestal plate 11 for fixing an anchor bolt is welded and fixed to the cut surface of the H-beam 5. Further, a support member 13 for a support column is passed horizontally between H-shaped steels 5 that are temporary columns, and then a permanent steel column 9 is fixed on a pedestal plate 11. Furthermore, a beam steel frame 15 that supports the slab of the first floor above ground is connected above the main steel column 9. Next, once the soil has been excavated and removed to the floor level, the foundation beams 17 are installed. The bottom of the pile is at a level roughly equivalent to the pile cap of PC pile 3. The column reinforcement 19 whose base is embedded in the foundation beam 17 and raised above the foundation beam 17 is arranged so as to surround the H-section steel 5, and the support material 13 is removed. Furthermore, a reinforced concrete beam (RC beam) 21 for supporting the floor of the first basement floor is cast together with concrete for a steel reinforced concrete column to be cast around the outside of the H-beam 5 so as to embed the pedestal plate 11. . Column main reinforcement is also arranged around the permanent steel column 9, and it is cast integrally with the concrete around the steel frame 15 of the beam, so that the H-beam 5 of the temporary support and the permanent steel column 9 are continuous in the underground section. It constitutes the installation support.

【0009】図5はPC杭3と仮設支柱用の鋼管23と
の接続部位を示す。PC杭3の杭頭において、その鉄筋
25を露出させ、この鉄筋に接続した杭頭リング27を
具え、更に杭頭リング27に鋼管23の底端部周囲を全
面的に溶接している。図6はPC杭3と仮設支柱用のH
形鋼5との接続部位を示している。鋼管23を接続する
場合と同じく、鉄筋25に杭頭リング27を接続し、こ
れにH形鋼5の底端部に当てて溶接固定したプレート2
9を溶接接続している。また、PC杭3の中心部にはH
形鋼5と連続するようにプレート29の下方へ延出する
H形鋼を溶接接続し、これをアンカー用H形鋼31とし
ている。アンカー用H形鋼31をPC杭3内部に通して
プレート29をPC杭3の杭頭にある杭頭リング27に
溶接接続している。
FIG. 5 shows the connection portion between the PC pile 3 and the steel pipe 23 for the temporary support. At the pile cap of the PC pile 3, the reinforcing bars 25 are exposed, and a pile cap ring 27 is connected to the reinforcing bars, and the entire bottom end of the steel pipe 23 is welded to the pile cap ring 27. Figure 6 shows PC pile 3 and H for temporary support.
The connection portion with the section steel 5 is shown. As in the case of connecting the steel pipe 23, the pile cap ring 27 is connected to the reinforcing bar 25, and the plate 2 is welded and fixed to the bottom end of the H-beam 5.
9 are connected by welding. In addition, there is an H in the center of the PC pile 3.
An H-section steel extending downward from the plate 29 is welded and connected to the section steel 5 so as to be continuous with the section steel 5, and this is used as an H-section steel 31 for an anchor. An anchor H-beam 31 is passed through the inside of the PC pile 3, and the plate 29 is welded to the pile cap ring 27 on the pile cap of the PC pile 3.

【0010】0010

【発明の効果】以上のべたように、本発明の逆打工法に
使用する仮設対応支柱によれば、PC杭の杭頭に本設柱
として使用可能なH形鋼,鋼管等を直列に溶接接続して
一体化し、これを杭穴に建て込むので、従来の如く場所
打杭を打ち込んだ後、仮設支柱を打ち込み、土中にてグ
ラウト等で接続する工法に較べて信頼性の高い支持力を
持った杭の施工ができる。また、予め目的支持力に合せ
て仮設支柱部分の強度寸法を選択できる。また、本柱の
位置でトラック桟橋に利用した場合は、仮設開口を残さ
ず、捨杭も要しない。したがって、工期的にも短縮でき
る効果がある。
[Effects of the Invention] As described above, according to the temporary support column used in the reverse driving method of the present invention, H-beams, steel pipes, etc. that can be used as permanent columns are welded in series to the pile cap of the PC pile. Because it is connected and integrated and then built into the pile hole, it has a more reliable bearing capacity than the conventional method of driving cast-in-place piles, then driving temporary supports, and connecting them with grout etc. in the soil. It is possible to construct piles with Furthermore, the strength dimensions of the temporary support portion can be selected in advance according to the intended supporting capacity. Additionally, if the main pillar location is used as a truck pier, no temporary openings will be left and piles will not be required. Therefore, it has the effect of shortening the construction period.

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

【図1】本発明の仮設対応支柱を説明するため、その利
用施工手順の最初を示す断面図である。
FIG. 1 is a cross-sectional view showing the beginning of the construction procedure for using the temporary support support column of the present invention.

【図2】次の手順工程を示す断面図である。FIG. 2 is a cross-sectional view showing the next procedural step.

【図3】更に次の手順工程を示す断面図である。FIG. 3 is a sectional view showing the next step.

【図4】その最終工程を示す断面図である。FIG. 4 is a sectional view showing the final step.

【図5】(a)仮設支柱部分とPC杭との接続部分を示
す説明図である。(b)その断面図である。
FIG. 5(a) is an explanatory diagram showing a connecting portion between a temporary support portion and a PC pile. (b) is a sectional view thereof.

【図6】(a)仮設支柱部分とPC杭との接続部分の説
明図である。(b)その断面図である。
FIG. 6(a) is an explanatory diagram of a connection portion between a temporary support portion and a PC pile. (b) is a sectional view thereof.

【符号の説明】[Explanation of symbols]

1    仮設対応支柱 3    PC杭 5    H形鋼 7    固定液 9    本設鉄骨柱 11    台座プレート 13    支持材 15    梁の鉄骨 17    基礎梁 19    柱筋 21    RC梁 23    鋼管 25    鉄筋 27    杭頭リング 29    プレート 31    アンカー用H形鋼 1   Temporary support support 3 PC stake 5 H-beam steel 7. Fixative solution 9 Permanent steel column 11 Pedestal plate 13 Support material 15 Beam steel frame 17 Foundation beam 19 Column muscle 21 RC beam 23 Steel pipe 25 Rebar 27 Pile cap ring 29 Plate 31 H-shaped steel for anchor

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】  既製杭の杭頭に、本設柱として使用可
能な強度寸法をもつH形鋼、鋼管などの仮設支柱を予め
直列に溶接接続して一体化し、これを杭穴に建て込むよ
うにしたことを特徴とする逆打工法に使用する仮設対応
支柱。
[Claim 1] Temporary supports such as H-beams and steel pipes with strength dimensions that can be used as permanent columns are welded in series to the pile heads of ready-made piles in advance and integrated, and these are built into the pile holes. A temporary support support used for the reverse construction method, which is characterized by the following features:
【請求項2】  前記H形鋼は既製杭の杭頭内部へ延び
るアンカー部分を有し、該既製杭の上端部において、そ
の主筋に溶接固定した杭頭リングに溶接接続したことを
特徴とする請求項1記載の逆打工法に使用する仮設対応
支柱。
2. The H-beam has an anchor portion extending into the pile cap of the ready-made pile, and is connected by welding to a pile cap ring welded and fixed to the main reinforcement at the upper end of the ready-made pile. A support post for temporary construction used in the reverse pouring method according to claim 1.
【請求項3】  前記鋼管は、既製杭の上端部において
、その主筋に溶接固定した杭頭リングに溶接接続したこ
とを特徴とする請求項1記載の逆打工法に使用する仮設
対応支柱。
3. The temporary support support for use in a reverse driving method according to claim 1, wherein the steel pipe is welded to a pile cap ring welded and fixed to the main reinforcement of the ready-made pile at the upper end thereof.
JP3167401A 1991-06-13 1991-06-13 Temporary support column used for reverse driving method Expired - Lifetime JP2858997B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3167401A JP2858997B2 (en) 1991-06-13 1991-06-13 Temporary support column used for reverse driving method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3167401A JP2858997B2 (en) 1991-06-13 1991-06-13 Temporary support column used for reverse driving method

Publications (2)

Publication Number Publication Date
JPH04366229A true JPH04366229A (en) 1992-12-18
JP2858997B2 JP2858997B2 (en) 1999-02-17

Family

ID=15849022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3167401A Expired - Lifetime JP2858997B2 (en) 1991-06-13 1991-06-13 Temporary support column used for reverse driving method

Country Status (1)

Country Link
JP (1) JP2858997B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0688350A (en) * 1992-09-09 1994-03-29 Kajima Corp Method of construction of structural stud
JPH10299019A (en) * 1997-04-28 1998-11-10 Ohbayashi Corp Joining method for permanent sub-structural column and main steel in inverted construction method
JP2011220009A (en) * 2010-04-12 2011-11-04 Kajima Corp Erection method of permanent sub-substructural column
JP2017031755A (en) * 2015-08-05 2017-02-09 大成建設株式会社 Base-isolated building construction method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0688350A (en) * 1992-09-09 1994-03-29 Kajima Corp Method of construction of structural stud
JPH10299019A (en) * 1997-04-28 1998-11-10 Ohbayashi Corp Joining method for permanent sub-structural column and main steel in inverted construction method
JP2011220009A (en) * 2010-04-12 2011-11-04 Kajima Corp Erection method of permanent sub-substructural column
JP2017031755A (en) * 2015-08-05 2017-02-09 大成建設株式会社 Base-isolated building construction method

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Publication number Publication date
JP2858997B2 (en) 1999-02-17

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