CAISSON LOWER STRUCTURE AND ITS CONSTRUCTION METHOD

To provide a caisson lower structure which can secure airtightness between a ceiling slab and a door body part and can densely form infilling concrete, and its construction method.SOLUTION: A caisson lower structure includes a ceiling slab 3 of a workroom 2 formed on the lower part of a caisson 1, a...

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Bibliographic Details
Main Authors ENDO SATOSHI, KOMATSU SACHIKO, SUGIYAMA KAZUYA
Format Patent
LanguageEnglish
Japanese
Published 02.03.2023
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:To provide a caisson lower structure which can secure airtightness between a ceiling slab and a door body part and can densely form infilling concrete, and its construction method.SOLUTION: A caisson lower structure includes a ceiling slab 3 of a workroom 2 formed on the lower part of a caisson 1, and a bottom door 10 for blocking a shaft communication hole (communication hole 8 for man shaft) vertically penetrating through the ceiling slab 3, wherein the bottom door 10 includes a door body part 11 formed so as to be divided into a plurality of pieces, a cylindrical manhole part 12 erected upward around a through hole (manhole 18) formed in the door body part 11, and a lid part 13 for blocking an upper opening of the manhole part 12.SELECTED DRAWING: Figure 3 【課題】天井スラブとドア本体部との間に気密性を確保できるとともに、中詰めコンクリートを密実に形成できるケーソン下部構造おびその構築方法を提供する。【解決手段】ケーソン１の下部に形成される作業室２の天井スラブ３と、天井スラブ３を上下に貫通するシャフト連通孔（マンシャフト用連通孔８）を閉塞するボトムドア１０とを備えるケーソン下部構造であって、ボトムドア１０は、複数に分割可能に形成されたドア本体部１１と、ドア本体部１１に形成された貫通孔（マンホール１８）の周囲に上方に向けて立設された筒状の人孔部１２と、人孔部１２の上開口部を閉塞する蓋部１３とを備えることを特徴とする。【選択図】図３
Bibliography:Application Number: JP20210132956