METHOD FOR CONSTRUCTING UNDERGROUND SKELETON

To provide a method for constructing an underground skeleton which enables excavation and concrete skeleton construction while lowering a groundwater level using making good use of well points when an underground skeleton (foundation slab) is constructed at a position deeper than a peripheral ground...

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Bibliographic Details
Main Authors YASUNAGA MASAMICHI, NAGAYAMA KOJI
Format Patent
LanguageEnglish
Japanese
Published 24.06.2021
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:To provide a method for constructing an underground skeleton which enables excavation and concrete skeleton construction while lowering a groundwater level using making good use of well points when an underground skeleton (foundation slab) is constructed at a position deeper than a peripheral ground water level.SOLUTION: A method for constructing an underground skeleton arranges a plurality of well points 10 in a pattern of lattice points in plan view together with risers 11 in a construction region (excavation expected region), and connects them to a plurality of parallel header pipes 12. The method performs excavation to a bedding ground 3 while lowering a groundwater level equal to or lower than the bedding ground 3 at the plurality of well points. After completion of excavation, the method constructs a concrete foundation slab 4 onto the bedding ground while continuously lowering the groundwater level.SELECTED DRAWING: Figure 1 【課題】周辺地下水位より深い位置に地下躯体（基礎スラブ）を構築する場合に、ウェルポイントを上手に利用して、地下水位を低下させつつ、掘削、及び、コンクリート造の躯体構築を行うことができる、地下躯体の施工方法を提供する。【解決手段】施工領域（躯体構築のための掘削予定領域）内に、複数のウェルポイント１０をそれぞれのライザー管１１と共に平面視で格子点状に配置して、複数の並列なヘッダー管１２と接続する。複数のウェルポイントで地下水位を床付地盤３以下に低下させながら、床付地盤まで掘削する。掘削完了後に、引き続き地下水位を低下させながら、床付地盤上にコンクリート造の基礎スラブ４を構築する。【選択図】図１
Bibliography:Application Number: JP20190229029