In-situ Monitoring of Side Friction of Drilled Piles by Different Loading Methods

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• 作者：Liqing Zhang^a ; ^b ; ^{34320409@qq.com" class="auth_mail" title="E-mail the corresponding author} ; Ye Ma^a ; ^b ; ^{228601028@qq.com" class="auth_mail" title="E-mail the corresponding author} ; Chunxia Song^a ; ^b ; ^{715235504@qq.com" class="auth_mail" title="E-mail the corresponding author} ; Yu Yang^a ; ^b ; ^{402051135@qq.com" class="auth_mail" title="E-mail the corresponding author} ; Lvyin Zhao^c
• 关键词：drilled pile ; side friction ; loading method ; repose time
• 刊名：Procedia Engineering
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：143
• 期：Complete
• 页码：445-453
• 全文大小：355 K

文摘

Side frictions of three groups of drilled piles under different loading methods in Xinwan interchange of Qianjiang Passageway and Connecting Project were monitored. Group 1 was loaded by static loading test method. The other two groups were loaded by dead load of superstructures, which were constructed using segmental hanging basket method and overall support cast-in-place method respectively. Axial forces and Side friction in all the piles increased gradually during the load-adding procedure. Group 1 was loaded two months after the finish of pile foundation construction, while group 3 started bearing the action of superstructure dead load six months after the finish of pile foundation construction. Piles in Group 1 and Group 3 have different repose time. Side frictions monitored from piles in Group 3, which have longer repose time, were larger than those in Group 1 under the same load. Side frictions monitored from piles in Group 2, which have longer off-time between two loading stage, were larger than those in Group 1 under the same load.