JP2002339379A - Method for installing pile-head stress relaxation device to existing structure - Google Patents
Method for installing pile-head stress relaxation device to existing structureInfo
- Publication number
- JP2002339379A JP2002339379A JP2001142334A JP2001142334A JP2002339379A JP 2002339379 A JP2002339379 A JP 2002339379A JP 2001142334 A JP2001142334 A JP 2001142334A JP 2001142334 A JP2001142334 A JP 2001142334A JP 2002339379 A JP2002339379 A JP 2002339379A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- pile head
- existing structure
- stress relaxation
- sections
- 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.)
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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、既存構造物を対象
として、その杭と上部構造体との間に、それらの相対回
転を許容しつつ軸力および剪断力を伝達する杭頭応力緩
和装置を設置するための方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile head stress relaxation device for transmitting an axial force and a shear force between an existing structure and a pile and an upper structure of the existing structure while permitting their relative rotation. A method for installing the
【0002】[0002]
【従来の技術】周知のように、杭頭部と上部構造体とは
剛接合することが従来一般的であるが、剛接合とした場
合には双方の相対回転が拘束されることから、地震時等
においては杭頭部に大きな曲げモーメントが作用するこ
とになり、したがって杭頭部および接合部には軸耐力と
剪断耐力のほか曲げ耐力も要求されて自ずと頑強で複雑
な構造とならざるを得ない。2. Description of the Related Art As is well known, a rigid connection between a pile head and an upper structure is conventionally generally performed. However, in the case of a rigid connection, relative rotation of both members is restricted, so that an earthquake occurs. In some cases, a large bending moment acts on the pile head, so that the pile head and joints are required to have not only axial strength but also shear strength, as well as bending strength. I can't get it.
【0003】そのため、近年、杭頭部と上部構造体とを
剛接合とするのではなく、実質的にピン接合の形態とし
てそれらの相対回転を許容することにより、単に軸力と
剪断力を伝達させて曲げモーメントは伝達させないとい
う杭頭接合構造も提案され、そのような構造で杭頭部と
上部構造体とを接合するための各種の杭頭応力緩和装置
も提案されている。[0003] Therefore, in recent years, instead of rigidly connecting the pile head and the upper structure, the relative rotation of the pile head and the upper structure has been substantially allowed in the form of a pin joint, so that the axial force and the shear force are simply transmitted. A pile head joint structure in which a bending moment is not transmitted while the pile head is being transmitted has been proposed, and various pile head stress relaxation devices for joining a pile head and an upper structure with such a structure have also been proposed.
【0004】[0004]
【発明が解決しようとする課題】上記のような杭頭接合
構造や杭頭応力緩和装置は構造物を新築する場合に広く
採用される気運にあるが、最近においては新築構造物の
みならず既存構造物に対してもそのような構造や装置を
適用して耐震性能を向上させたいという要請があり、そ
のため既存構造物の杭頭部にそのような装置を組み込む
ための有効適切な手法の開発が望まれている。The pile head joint structure and the pile head stress relieving device described above have been widely adopted when newly constructing a structure. Recently, however, not only newly constructed structures but also existing structures have been used. There is a demand to improve the seismic performance by applying such structures and devices to structures, and therefore, development of effective and appropriate methods for incorporating such devices into pile heads of existing structures Is desired.
【0005】[0005]
【課題を解決するための手段】上記事情に鑑み、請求項
1の発明は、既存構造物を対象としてその杭と上部構造
体との間にそれらの相対回転を許容しつつ軸力および剪
断力を伝達する杭頭応力緩和装置を設置するに際し、既
存構造物に近接する位置に立坑を設けるとともに立坑か
ら既存構造物の下方地盤に横坑を設け、横坑内からの作
業により杭頭部の周囲の地盤を掘削して杭頭部を露出さ
せ、各杭が支持している上部構造体を仮受けしつつ杭頭
部の一部を切断除去してそこに杭頭応力緩和装置を設置
することを特徴とする。SUMMARY OF THE INVENTION In view of the above circumstances, the invention of claim 1 is directed to an existing structure, in which an axial force and a shear force are allowed between the pile and the upper structure while allowing relative rotation between the pile and the upper structure. When installing a pile head stress relieving device that transmits heat, a vertical shaft is provided near the existing structure, a horizontal shaft is provided from the vertical shaft to the ground below the existing structure, and work around the pile head is performed from inside the horizontal shaft. Excavating the ground and exposing the pile head, cutting and removing a part of the pile head while temporarily supporting the superstructure supported by each pile, and installing a pile head stress relief device there It is characterized by.
【0006】請求項2の発明は、請求項1の発明の既存
構造物への杭頭応力緩和装置の設置方法において、杭頭
応力緩和装置として球座とその球座に装着されて全方向
に揺動可能に支持される上蓋からなるものを採用し、そ
れら球座および上蓋をそれぞれ杭の切断部の下部および
上部に固定することを特徴とする。According to a second aspect of the present invention, there is provided a method for installing a pile head stress relaxation device on an existing structure according to the first aspect of the present invention, wherein the pile head stress relaxation device is mounted on the ball seat and mounted on the ball seat in all directions. A swingable upper lid is used, and the ball seat and the upper lid are fixed to the lower and upper portions of the cut portion of the pile, respectively.
【0007】請求項3の発明は、請求項1または2の発
明の既存構造物への杭頭応力緩和装置の設置方法におい
て、杭頭部の一部を切断除去するに際しては、切断予定
位置の下部にブラケットを仮固定し、ブラケットにジャ
ッキを設置し、ジャッキにより上部構造体を仮受けする
ことを特徴とする。According to a third aspect of the present invention, in the method for installing a stress relief device for a pile head on an existing structure according to the first or second aspect of the present invention, when a part of the pile head is cut and removed, a position to be cut is determined. The bracket is temporarily fixed to a lower portion, a jack is installed on the bracket, and the upper structure is temporarily received by the jack.
【0008】[0008]
【発明の実施の形態】本発明の一実施形態を図1〜図7
を参照して説明する。本実施形態は浄水場に設けられて
いる既存の配水池1を対象とする耐震改修工事に本発明
を適用して、既存の杭2とそれに支持されている上部構
造体としての鉄筋コンクリート造の水槽本体3との間に
後述する杭頭応力緩和装置を設置する場合の適用例であ
る。1 to 7 show an embodiment of the present invention.
This will be described with reference to FIG. In this embodiment, the present invention is applied to an existing seismic retrofitting work for an existing reservoir 1 provided in a water purification plant, and an existing pile 2 and a reinforced concrete tank as an upper structure supported by the pile 2 are provided. This is an application example in the case where a later described pile head stress relaxation device is installed between the main body 3 and the main body 3.
【0009】本実施形態では、まず図1に示すように、
配水池1に近接する位置(本例では両側2カ所)に立坑
4を設けて掘削し、立坑4の底部から水槽本体3の下部
を横断するような主横坑5を掘削し、さらに主横坑5か
ら杭2の間に多数の分岐横坑6を掘削し、分岐横坑6内
からの作業により図2に示すように杭2の杭頭部の周囲
の地盤を掘削して杭頭部を露出させる。In this embodiment, first, as shown in FIG.
A shaft 4 is provided at a position close to the reservoir 1 (in this example, two places on both sides) and excavated. A main shaft 5 that crosses the lower part of the water tank body 3 from the bottom of the shaft 4 is excavated. A large number of branch shafts 6 are excavated between the pit 5 and the pile 2, and the ground around the pile head of the pile 2 is digged as shown in FIG. To expose.
【0010】そして、各杭2が支持している水槽本体3
を仮受けしつつ、杭頭部の一部を切断除去してそこに杭
頭応力緩和装置を設置する。すなわち、図3に示すよう
に、切断予定位置の下部にブラケット7を仮固定し、そ
のブラケット7上にジャッキ8を設置し、それらジャッ
キ8により水槽本体3を仮受けする。本例におけるブラ
ケット7はその基部に鉄骨材からなる半割環状体7aが
連結されており、それら半割環状体7aを相互に連結し
て杭頭部の回りに楔7bによって装着することでブラケ
ット7を杭頭部に対して強固に仮固定するようにしてい
る。ジャッキ8はブラケット7上に高さ調整台9を介し
て上向きに設置されて水槽本体3の底面を支持するもの
とされている。符号10は水槽本体3の位置を測定して
ジャッキ8のストロークを調整するための変位計であ
る。The water tank body 3 supported by each of the piles 2
While temporarily accepting, a part of the pile head is cut and removed, and a pile head stress relaxation device is installed there. That is, as shown in FIG. 3, the bracket 7 is temporarily fixed to the lower part of the planned cutting position, the jack 8 is installed on the bracket 7, and the water tank main body 3 is temporarily received by the jack 8. The bracket 7 in this example has a half-ring body 7a made of a steel frame material connected to its base, and these half-ring bodies 7a are connected to each other and mounted around the pile head by a wedge 7b. 7 is temporarily fixed firmly to the pile head. The jack 8 is installed upward on the bracket 7 via the height adjustment stand 9 and supports the bottom surface of the water tank main body 3. Reference numeral 10 denotes a displacement gauge for measuring the position of the water tank main body 3 and adjusting the stroke of the jack 8.
【0011】上記のようにジャッキ8によって水槽本体
3を仮受けした状態で、図4に示すように杭頭部を2カ
所において切断し、図5に示すように杭頭部の一部を切
断除去する。そして、その切断部11に図6に示すよう
に杭頭応力緩和装置12を設置する。With the water tank body 3 temporarily received by the jack 8 as described above, the pile head is cut at two places as shown in FIG. 4, and a part of the pile head is cut as shown in FIG. Remove. Then, a pile head stress relieving device 12 is installed in the cut portion 11 as shown in FIG.
【0012】本例における杭頭応力緩和装置12は、図
7に示すように、球座13と、その球座13に装着され
て全方向に揺動可能に支持される上蓋14からなり、そ
れら球座13および上蓋14をそれぞれ杭2の切断部1
1の下部および上部に固定部材15を介して固定するよ
うにしている。固定部材15は、球座13および上蓋1
4に対してボルト・ナットにより取り付けられる鋼板1
6と、その周囲に溶接される半割鋼管17からなり、こ
の固定部材15は、球座13および上蓋14に鋼板16
をそれぞれボルト18により取り付け、それら鋼板16
を切断部11の上下の切断面に対してそれぞれ装着した
後、各鋼板16の周囲に半割鋼板17が溶接されること
で組み立てられ、その固定部材15と杭頭部との隙間に
無収縮モルタル等の充填材が充填されるようになってい
る。As shown in FIG. 7, the pile head stress relieving device 12 in this embodiment comprises a ball seat 13 and an upper lid 14 mounted on the ball seat 13 and supported so as to swing in all directions. The ball seat 13 and the upper lid 14 are each cut into
1 is fixed to a lower part and an upper part via a fixing member 15. The fixing member 15 includes the ball seat 13 and the upper lid 1.
Steel plate 1 attached to bolt 4 with bolts and nuts
6 and a half steel pipe 17 welded to the periphery thereof.
Are respectively attached by bolts 18 and the steel plates 16
Are attached to the upper and lower cut surfaces of the cutting portion 11, respectively, and a half steel plate 17 is welded around each of the steel plates 16 to assemble, and the gap between the fixing member 15 and the pile head is not shrunk. A filler such as mortar is filled.
【0013】以上の手順で杭頭応力緩和装置12を設置
したら、ジャッキ8およびブラケット7を撤去し、球座
13および上蓋14の周囲に土砂流入を防止するための
被覆体19を装着する。被覆体19としては杭頭応力緩
和装置12の作動を拘束しない柔軟な素材のもの、たと
えば発泡スチロール等が好適に採用可能である。全ての
杭2に対して以上の作業が完了したら、杭頭部の周囲、
分岐横坑6、主横坑5、立坑4の埋め戻しを行えば施工
完了となる。After the pile head stress relieving device 12 is installed in the above procedure, the jack 8 and the bracket 7 are removed, and a cover 19 for preventing earth and sand from flowing around the ball seat 13 and the upper lid 14 is attached. As the coating 19, a material made of a flexible material that does not restrict the operation of the pile head stress relaxation device 12, for example, styrene foam, can be suitably used. When the above operation is completed for all piles 2, around the pile head,
The construction is completed by backfilling the branch shaft 6, the main shaft 5, and the shaft 4.
【0014】なお、ブラケット7とジャッキ8の設置、
杭頭応力緩和装置12の設置、ジャッキ8とブラケット
7の撤去は、各杭2ごとに順次行うこととして、撤去し
たブラケット7およびジャッキ8を他の杭2において転
用すれば良いが、あるいは全ての杭2に対してブラケッ
ト7およびジャッキ8を設置し、全ての杭頭応力緩和装
置12を設置した後に、全てのジャッキ8とブラケット
7を撤去することでも良い。また、工区を区切ることで
埋め戻し作業を杭頭応力緩和装置12の設置作業と並行
して行うことも可能である。The installation of the bracket 7 and the jack 8,
The installation of the pile head stress relaxation device 12 and the removal of the jack 8 and the bracket 7 are sequentially performed for each pile 2, and the removed bracket 7 and the jack 8 may be diverted to another pile 2, or all After the bracket 7 and the jack 8 are installed on the pile 2 and all the pile head stress relieving devices 12 are installed, all the jacks 8 and the bracket 7 may be removed. Further, by dividing the construction section, the backfilling work can be performed in parallel with the installation work of the pile head stress relaxation device 12.
【0015】上記のように、既存構造物である配水池1
における杭頭部に杭頭応力緩和装置12を設置すること
により、その杭頭部に過大な曲げモーメントが生じるこ
とがなくなり、したがって杭自体や杭頭部に対する補強
を行ったり杭を増設するといった従来の補強方法による
ことなく、杭基礎部の耐震性を向上させることができ
る。As described above, the distribution reservoir 1 which is the existing structure
By installing the pile head stress relaxation device 12 at the pile head in the above, an excessive bending moment is not generated at the pile head, and therefore, the conventional method of reinforcing the pile itself or the pile head or adding a pile is used. The seismic resistance of the pile foundation can be improved without depending on the reinforcing method.
【0016】そして、上記実施形態によれば、改修対象
の既存構造物である配水池1の下方に設けた分岐横坑6
内から作業を行うので、配水池1自体に対しては何等手
を加える必要がなく、したがってその配水池1をそのま
ま使用しながらの工事が可能である。また、上記実施形
態によれば杭頭部の一部を切断撤去してそこに杭頭応力
緩和装置12を設置するだけで良く、その際にはジャッ
キ8によって上部構造体である水槽本体3を支障なく仮
受けすることができるから、何等格別かつ煩雑な作業を
必要とせず、立坑4、主横坑5、分岐横坑6の掘削以外
は大型の重機類も必要としないから、極めて合理的かつ
有効である。According to the above-described embodiment, the branch shaft 6 provided below the distribution reservoir 1 which is an existing structure to be repaired.
Since the work is performed from the inside, there is no need to make any changes to the reservoir 1 itself, so that construction can be performed while using the reservoir 1 as it is. In addition, according to the above embodiment, it is only necessary to cut and remove a part of the pile head and install the pile head stress relaxation device 12 there, and in this case, the water tank body 3 as the upper structure is jacked by the jack 8. It can be temporarily received without any trouble, so no extraordinary and complicated work is required, and no large heavy equipment is required except for excavation of the shaft 4, main horizontal shaft 5, and branch horizontal shaft 6. And effective.
【0017】なお、本発明は上記のような配水池に対す
る耐震改修工事として適用するのみならず、杭基礎を有
し、かつ下方地盤を掘削して横坑を設けることでそこか
らの作業が可能な形態のものである限りにおいて、様々
な用途、規模、形態の既存構造物に対して広く適用でき
ることは当然であるし、立坑や横坑の設置形態、既存構
造物の仮受けの形態、採用する杭頭応力緩和装置の構
成、具体的な作業工程その他についても、上記実施形態
に限定されることなく適宜の変更が可能であることは言
うまでもない。The present invention can be applied not only to the above-mentioned seismic retrofitting work for the reservoir, but also to the work having a pile foundation and excavating the lower ground to provide a horizontal shaft. Naturally, it can be widely applied to existing structures of various uses, scales and forms, as long as it is of a suitable form, as well as the installation form of vertical shafts and horizontal shafts, the form of temporary receiving of existing structures, and adoption. Needless to say, the configuration of the pile head stress relaxation device to be performed, the specific working steps, and the like can be appropriately changed without being limited to the above embodiment.
【0018】[0018]
【発明の効果】請求項1の発明によれば、既存構造物の
杭頭部に杭頭応力緩和装置を設置することでその耐震性
を向上させることができることはもとより、その作業
を、既存構造物に近接する位置に立坑を設けるとともに
立坑から既存構造物の下方地盤に横坑を設け、横坑内か
らの作業により杭頭部の周囲の地盤を掘削して杭頭部を
露出させ、各杭が支持している上部構造体を仮受けしつ
つ杭頭部の一部を切断除去してそこに杭頭応力緩和装置
を設置するようにしたので、既存構造物自体に対しては
何等手を加える必要がなく、したがって既存構造物をそ
のまま使用しながらの工事も可能であるし、何等格別か
つ煩雑な作業を必要とせず、極めて合理的かつ有効であ
る。According to the first aspect of the present invention, it is possible to improve the seismic resistance of the existing structure by installing the pile head stress relaxation device at the pile head, and also to carry out the work with the existing structure. A vertical shaft is provided at a position close to the structure, and a horizontal shaft is provided below the existing structure from the vertical shaft, and the ground around the pile head is excavated by working from the horizontal shaft to expose the pile head, and each pile is exposed. While temporarily receiving the upper structure supported by the company, a part of the pile head was cut and removed, and a pile head stress relief device was installed there. There is no need to add them, so construction while using the existing structure as it is is possible, and no extraordinary and complicated work is required, which is extremely reasonable and effective.
【0019】請求項2の発明によれば、杭頭応力緩和装
置として球座とその球座に装着されて全方向に揺動可能
に支持される上蓋からなる構成のものを採用し、それら
球座および上蓋をそれぞれ杭の切断部の下部および上部
に固定するので、その杭頭応力緩和装置により杭頭部に
おける曲げモーメントの伝達を確実に断つことができる
し、その設置作業も容易かつ確実に行い得る。According to the second aspect of the present invention, a pile head stress relieving device having a structure comprising a ball seat and an upper lid mounted on the ball seat and supported so as to swing in all directions is adopted. Since the seat and the top lid are fixed to the lower and upper parts of the cut section of the pile, respectively, the transmission of bending moment at the pile head can be reliably cut off by the pile head stress relaxation device, and the installation work is also easy and reliable. Can do.
【0020】請求項3の発明によれば、杭頭部の一部を
切断除去するに際して、切断予定位置の下部にブラケッ
トを仮固定し、ブラケットにジャッキを設置し、ジャッ
キにより上部構造体を仮受けするので、ジャッキによっ
て上部構造体を何等支障なく安定にかつ容易に仮受けす
ることができる。According to the third aspect of the present invention, when cutting and removing a part of the pile head, the bracket is temporarily fixed below the expected cutting position, the jack is installed on the bracket, and the upper structure is temporarily fixed by the jack. As a result, the upper structure can be temporarily and easily temporarily received by the jack without any trouble.
【図1】 本発明方法の実施形態を示すもので、改修対
象の既存構造物の下方地盤に横坑を設けた状態を示す図
である。FIG. 1 shows an embodiment of the method of the present invention, and shows a state in which a horizontal shaft is provided in the ground below an existing structure to be repaired.
【図2】 同、杭頭部を露出させた状態を示す図であ
る。FIG. 2 is a diagram showing a state in which a pile head is exposed.
【図3】 同、上部構造体をジャッキにより仮受けした
状態を示す図である。FIG. 3 is a view showing a state in which the upper structure is temporarily received by a jack.
【図4】 同、杭頭部の切断位置を示す図である。FIG. 4 is a diagram showing a cutting position of a pile head.
【図5】 同、杭頭部を切断除去した状態を示す図であ
る。FIG. 5 is a view showing a state where the pile head is cut and removed.
【図6】 同、杭頭応力緩和装置を設置した状態を示す
図である。FIG. 6 is a diagram showing a state in which the pile head stress relaxation device is installed.
【図7】 同、杭頭応力緩和装置を示す図である。FIG. 7 is a view showing a pile head stress relaxation device.
【符号の説明】 1 配水池(既存構造物) 2 杭 3 水槽本体(上部構造体) 4 立坑 5 主横坑(横坑) 6 分岐横坑(横坑) 7 ブラケット 8 ジャッキ 11 切断部 12 杭頭応力緩和装置 13 球座 14 上蓋 15 固定部材[Description of Signs] 1 Reservoir (existing structure) 2 Pile 3 Main body of tank (upper structure) 4 Vertical shaft 5 Main horizontal shaft (horizontal shaft) 6 Branch horizontal shaft (horizontal shaft) 7 Bracket 8 Jack 11 Cutting part 12 Piles Head stress relaxation device 13 Ball seat 14 Top cover 15 Fixing member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 真野 英之 東京都港区芝浦一丁目2番3号 清水建設 株式会社内 Fターム(参考) 2D046 CA01 DA11 DA12 2E176 AA01 BB28 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideyuki Mano 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2D046 CA01 DA11 DA12 2E176 AA01 BB28
Claims (3)
造体との間にそれらの相対回転を許容しつつ軸力および
剪断力を伝達する杭頭応力緩和装置を設置するに際し、
既存構造物に近接する位置に立坑を設けるとともに立坑
から既存構造物の下方地盤に横坑を設け、横坑内からの
作業により杭頭部の周囲の地盤を掘削して杭頭部を露出
させ、各杭が支持している上部構造体を仮受けしつつ杭
頭部の一部を切断除去してそこに杭頭応力緩和装置を設
置することを特徴とする既存構造物への杭頭応力緩和装
置の設置方法。When installing a pile head stress relaxation device for transmitting an axial force and a shear force while allowing relative rotation between the pile and an upper structure for an existing structure,
A vertical shaft is provided at a position close to the existing structure, and a horizontal shaft is provided below the existing structure from the vertical shaft, and the ground around the pile head is excavated by work from within the horizontal shaft to expose the pile head, Pile head stress relief for existing structures characterized by cutting and removing a part of the pile head while temporarily receiving the superstructure supported by each pile and installing a pile head stress relief device there How to install the device.
装着されて全方向に揺動可能に支持される上蓋からな
り、球座および上蓋をそれぞれ杭の切断部の下部および
上部に固定することを特徴とする請求項1記載の既存構
造物への杭頭応力緩和装置の設置方法。2. A pile head stress relieving device comprising a ball seat and an upper lid mounted on the ball seat and supported so as to be swingable in all directions, wherein the ball seat and the upper lid are respectively lower and upper portions of a cut portion of the pile. The method according to claim 1, wherein the pile head stress relief device is installed on an existing structure.
断予定位置の下部にブラケットを仮固定し、ブラケット
にジャッキを設置し、ジャッキにより上部構造体を仮受
けすることを特徴とする請求項1または2記載の既存構
造物への杭頭応力緩和装置の設置方法。3. When cutting off a part of a pile head, a bracket is temporarily fixed to a lower portion of a planned cutting position, a jack is installed on the bracket, and the upper structure is temporarily received by the jack. A method for installing a pile head stress relaxation device on an existing structure according to claim 1 or 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001142334A JP2002339379A (en) | 2001-05-11 | 2001-05-11 | Method for installing pile-head stress relaxation device to existing structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001142334A JP2002339379A (en) | 2001-05-11 | 2001-05-11 | Method for installing pile-head stress relaxation device to existing structure |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2002339379A true JP2002339379A (en) | 2002-11-27 |
Family
ID=18988652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001142334A Withdrawn JP2002339379A (en) | 2001-05-11 | 2001-05-11 | Method for installing pile-head stress relaxation device to existing structure |
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Country | Link |
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JP (1) | JP2002339379A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009001974A (en) * | 2007-06-19 | 2009-01-08 | Mase Kensetsu Kk | Existing-column cutting and holding method, and load bearing member |
JP2012211439A (en) * | 2011-03-30 | 2012-11-01 | Taisei Corp | Construction method for underground structure, and pile head structure of temporary intermediate pile |
JP2014055453A (en) * | 2012-09-12 | 2014-03-27 | Taisei Corp | Method for temporarily supporting foundation |
-
2001
- 2001-05-11 JP JP2001142334A patent/JP2002339379A/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009001974A (en) * | 2007-06-19 | 2009-01-08 | Mase Kensetsu Kk | Existing-column cutting and holding method, and load bearing member |
JP2012211439A (en) * | 2011-03-30 | 2012-11-01 | Taisei Corp | Construction method for underground structure, and pile head structure of temporary intermediate pile |
JP2014055453A (en) * | 2012-09-12 | 2014-03-27 | Taisei Corp | Method for temporarily supporting foundation |
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