Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
TEMPORARY SHUTOFF METHOD OF EXISTING UNDERWATER STRUCTURE
PROBLEM TO BE SOLVED: To provide a temporary shutoff method of an existing underwater structure which minimizes a dredge range, is also adaptive to the case where a cross-sectional shape of a bridge pier is changed, and can accurately perform press-fitting into the underwater ground.SOLUTION: In accordance with the temporary shutoff method of the existing underwater structure, the periphery of the existing underwater structure such as a bridge pier P is shut off by a temporary shutoff body 1, water is drained from the inside and main construction is implemented. The temporary shutoff method includes: a reaction-force bracket installation step of installing a reaction-force bracket 3 for obtaining a reaction force from the existing underwater structure in press-fitting the temporary shutoff body 1 into the underwater ground in an upper part of the existing underwater structure; and a temporary shutoff body press-fitting/excavation step of press-fitting the temporary shutoff body 1 into the underwater ground with a press-fitting jack 4 while obtaining the reaction force from the existing underwater structure by means of the reaction-force bracket 3, and excavating the underwater ground inside of the temporary shutoff body 1. The temporary shutoff body 1 is moved down while being guided by a guide bracket 8' including a roller member 8a' or a sliding member in a distal end abutted to the temporary shutoff body 1.
【課題】浚渫範囲を最小限にするとともに、橋脚の断面形状が変化する場合も対応することができ、水中地盤に正確に圧入することができる既設水中構造物の仮締切り工法を提供する。【解決手段】橋脚Ｐなどの既設水中構造物の周りを締切り仮設体１で締め切ってその内部を排水して本工事を行う既設水中構造物の仮締切り工法であって、締切り仮設体１を水中地盤に圧入する際に既設水中構造物から反力を得るための反力ブラケット３を既設水中構造物の上部に設置する反力ブラケット設置工程と、反力ブラケット３で既設水中構造物から反力を得つつ、圧入ジャッキ４により締切り仮設体１を水中地盤に圧入するとともに、締切り仮設体１の内側の水中地盤を掘削する締切り仮設体圧入・掘削工程と、を有し、締切り仮設体１に当接する先端にローラ部材８ａ’又は摺接部材を有するガイドブラケット８’により、締切り仮設体１をガイドしながら下降させる。【選択図】図４
TEMPORARY SHUTOFF METHOD OF EXISTING UNDERWATER STRUCTURE
PROBLEM TO BE SOLVED: To provide a temporary shutoff method of an existing underwater structure which minimizes a dredge range, is also adaptive to the case where a cross-sectional shape of a bridge pier is changed, and can accurately perform press-fitting into the underwater ground.SOLUTION: In accordance with the temporary shutoff method of the existing underwater structure, the periphery of the existing underwater structure such as a bridge pier P is shut off by a temporary shutoff body 1, water is drained from the inside and main construction is implemented. The temporary shutoff method includes: a reaction-force bracket installation step of installing a reaction-force bracket 3 for obtaining a reaction force from the existing underwater structure in press-fitting the temporary shutoff body 1 into the underwater ground in an upper part of the existing underwater structure; and a temporary shutoff body press-fitting/excavation step of press-fitting the temporary shutoff body 1 into the underwater ground with a press-fitting jack 4 while obtaining the reaction force from the existing underwater structure by means of the reaction-force bracket 3, and excavating the underwater ground inside of the temporary shutoff body 1. The temporary shutoff body 1 is moved down while being guided by a guide bracket 8' including a roller member 8a' or a sliding member in a distal end abutted to the temporary shutoff body 1.
【課題】浚渫範囲を最小限にするとともに、橋脚の断面形状が変化する場合も対応することができ、水中地盤に正確に圧入することができる既設水中構造物の仮締切り工法を提供する。【解決手段】橋脚Ｐなどの既設水中構造物の周りを締切り仮設体１で締め切ってその内部を排水して本工事を行う既設水中構造物の仮締切り工法であって、締切り仮設体１を水中地盤に圧入する際に既設水中構造物から反力を得るための反力ブラケット３を既設水中構造物の上部に設置する反力ブラケット設置工程と、反力ブラケット３で既設水中構造物から反力を得つつ、圧入ジャッキ４により締切り仮設体１を水中地盤に圧入するとともに、締切り仮設体１の内側の水中地盤を掘削する締切り仮設体圧入・掘削工程と、を有し、締切り仮設体１に当接する先端にローラ部材８ａ’又は摺接部材を有するガイドブラケット８’により、締切り仮設体１をガイドしながら下降させる。【選択図】図４
TEMPORARY SHUTOFF METHOD OF EXISTING UNDERWATER STRUCTURE
既設水中構造物の仮締切り工法
IWAMOTO YASUSHI (Autor:in) / KUSAKA MIKIO (Autor:in) / TOZAWA SATORU (Autor:in)
28.01.2016
Patent
Elektronische Ressource
Japanisch
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