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（1 中國(guó)鐵路設(shè)計(jì)集團(tuán)有限公司， 天津 300308；2 北京市建設(shè)工程質(zhì)量第六檢測(cè)所有限公司， 北京 100076）

［摘要］抗拔載體樁通過將縱向鋼筋伸入載體內(nèi)，在抗拔受力時(shí)可充分發(fā)揮載體的錨固作用，顯著提高其抗拔承載力。對(duì)抗拔載體樁的抗拔承載機(jī)理進(jìn)行理論分析，并結(jié)合一實(shí)際工程進(jìn)行了抗拔載體樁的單樁和群樁抗拔靜載試驗(yàn)，研究其單樁受力和群樁受力時(shí)單樁的相互影響。研究結(jié)果表明，抗拔載體樁單樁承載力較相同尺寸的普通直桿樁有較大提高。對(duì)試驗(yàn)結(jié)果進(jìn)行分析，提出了適合抗拔載體樁單樁抗拔承載力的計(jì)算公式，并通過對(duì)國(guó)內(nèi)多個(gè)項(xiàng)目進(jìn)行比對(duì)，驗(yàn)證了其可行性。

［關(guān)鍵詞］抗拔載體樁； 單樁；群樁；抗拔承載力；等效直徑；三擊貫入度

中圖分類號(hào)：TU473-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)06-0135-04

Bearing mechanism and experimental research of uplift piles with ram-compacted bearing sphere

ZHOU Xiaogang1, YANG Qi′an2

(1 China Railway Design Corporation, Tianjin 300308, China；2 Beijing No.6 Construction Engineering Quality Test Department Co., Ltd., Beijing 100076, China)

Abstract:By extending the longitudinal steel bar into the bearing sphere, uplift piles with ram-compacted bearing sphere can give full play to the anchoring effect of the bearing sphere when it is under pulling force, and uplift bearing capacity is improved significantly. The uplift bearing mechanism of the uplift piles with ram-compacted bearing sphere was theoretically analyzed, and combined with an actual project, the uplift static load test of the single pile and the group pile of the uplift piles with ram-compacted bearing sphere was carried out to study the interaction between single pile and group pile when they were under the action of forces. The research results show that the single pile bearing capacity of the uplift piles with ram-compacted bearing sphere is much higher than that of the ordinary straight piles of the same size. The test results were analyzed, and a formula for calculating the uplift bearing capacity of the single uplift pile with ram-compacted bearing sphere was proposed, and its feasibility was verified by comparing with multiple domestic projects.

Keywords:uplift pile with ram-compacted bearing sphere;single pile; group pile;uplift bearing capacity;equivalent diameter;total penetrations of three drives

作者簡(jiǎn)介：周曉剛，碩士，高級(jí)工程師，Email:1767794739@qq.com；通信作者：楊啟安，碩士，高級(jí)工程師，Email:yangqian2000@126.com。