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The study on Anchor''s behavior of Vertical anchor in Gravel Deposites in Taichung Area
Authors
Delia Grace
Nguyen-Viet Hung
+5 more
Ruiyun Li
Johanna Lindahl
Johanna F. Lindahl
Jiaxin Ling
Mahmoud M. Naguib
Publication date
6 June 2014
Publisher
土木工程學系
Doi
View
on
PubMed
Abstract
摘 要 地錨在基礎工 程中之應用範圍非常廣泛,但在推估單 支地錨之容許荷重時,由於 存在相當多之不確定性,如錨 碇端與周圍土壤複雜之互制作用、現場裝 設作業與灌漿過 程對錨碇端附近土壤之擾動、地層變化等之綜合影響, 再 加上地錨的設計理論仍未完善,使得設計者往往無法掌握 適切之設 計參數,因此一般皆以現場試驗來檢核。目前對 地錨在礫石層上之錨碇 行為的研究較少,實有加以研究之 需要。 本研究首先進行現場基地地層之調查及地層之一般 物理性試驗以 瞭解地層特性,並參考中國土木水利工程學 會之「地錨設計與施工準則 之研究」所建議的試驗規範, 就礫石層中直徑15公分,長度15.4公尺 的6支垂直地錨 進行試驗,求得地錨容許荷重且檢核其品質,並由不 同之 極限錨碇力建議公式,回算礫石層之內摩擦角,並與前人 研究所 得之值相比較,以供設計時參考。 經試驗後,試驗地錨 之容許荷重達144噸,因此在一 般實務之應用上,以直徑15公分、 長度15.4公尺與錨腱 為7股絞線12.7mm之地錨來提供抗拉力,極具經 濟效益; 若在施工以及完工後之品質檢驗也能確實進行,則其安全 性更可獲得保證,故地錨在礫石層上之應用十分具有潛 力。而回算得 的內摩擦角,因受限於無法完全掌握各公式 的影響因素,所得之內摩擦 角雖與已知之值相近,顯示本 試驗地錨能發揮礫石層之摩擦阻力,但仍 有審慎評估之必 要
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