EXPANDABLE BEAM FOR SHEATHING VERTICAL SHAFT

PURPOSE:To support a liner plate to a predetermined depth in a vertical shaft without joining a longitudinal wale and to easily draw out the inner plate by telescopically and expandably assembling a plurality of columnar members so that they can be slid from a position where they are superposed one...

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Bibliographic Details
Main Author NOMURA NORIYASU
Format Patent
LanguageEnglish
Published 15.08.1995
Edition6
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:PURPOSE:To support a liner plate to a predetermined depth in a vertical shaft without joining a longitudinal wale and to easily draw out the inner plate by telescopically and expandably assembling a plurality of columnar members so that they can be slid from a position where they are superposed one another to a position where they are extended from one another. CONSTITUTION:After a vertical shaft is excavated to a certain depth, a plurality of longitudinal wales composed of expandable beams 10 i are arranged along a liner plate which is therefore supported thereby, and crosswise wales are fixed to the longitudinal wales, and cut beams are provided among the crosswise wales. Further, the vertical shaft is continuously excavated, and accordingly, liner plates are successively set. When longitudinal wales for supporting these new liner plates are set, a coupling pin 17 is removed, and then two columnar members 12, 13 are lowered, and are set up on the ground in the bottom part of the vertical shaft. Thus drawn-out columnar members 12, 13 are used as the longitudinal wales to which the crosswise wales are then attached, and cut beams are arranged between the crosswise wales. Thereby it is possible to facilitate the vertical wall setting work.
Bibliography:Application Number: JP19940009849