2023·4·Building Construction 770
同步同心式斜撑桩侧摩阻力现场试验研究
周节定 1 胡 磊 2 王乾浩 3
1. 宁波市枢纽港城市发展有限公司 浙江 宁波 315299；
2. 宁波宁大地基处理技术有限公司 浙江 宁波 315211；3. 浙江鸿晨建设有限公司 浙江 宁波 315000
摘要： 依托实际工程，对同步同心式斜撑桩侧摩阻力进行现场载荷试验研究。分析了各级荷载作用下斜撑桩的应变、
轴力、桩侧摩阻力的性状，对比了斜撑桩钢管带肋与不带肋的受力特性。试验结果表明：斜撑桩上部的侧阻力先发挥
作用，其工作特性与摩擦桩相似；试验桩极限承载力约为1 400 kN，粉土层中水泥土-桩周土界面侧摩阻力极限值约为
80 kPa，此时对应的水泥土-钢管界面侧摩阻力约为165 kPa；内芯钢管和水泥土侧摩阻力分布规律一致，其比值约为
水泥土和钢管外径之比；钢管带肋与否对斜撑桩受力特性的变化几乎没有影响。
关键词： 斜撑桩；同步同心式；劲性复合桩；侧摩阻力；带肋
中图分类号：
T U 470 文献标志码： A 文章编号： 1004 -1001(2023)04 -0 770-0 3 DOI： 1 0.1 4144/j. c nki. jz sg .2023.04.041
Field Test Study on Side Friction of Synchronous Concentric Inclined Strut Pile
ZHOU Jieding 1 HU Lei 2 WANG Qianhao 3
1. Ningbo Hub Port City Development Co., Ltd., Ningbo 315299, Zhejiang, China;
2. Ningbo Ningda Foundation Treatment Technology Co., Ltd., Ningbo 315211, Zhejiang, China; 3. Zhejiang Hongchen Construction Co., Ltd., Ningbo 315000, Zhejiang, China
Abstract:
R ely in g o n th e a ctu al p ro je ct, th e s id e fr ic tio n o f s yn chro nous c oncentr ic in clin ed s tr u t p ile s is s tu d ie d b y fie ld
l o ad te st. T he b ehavio r o f s tr a in , a xia l fo rc e a nd p ile s id e fr ic tio n o f in clin ed s tr u t p ile s u nd er v a rio us lo ad s is a naly ze d , a nd
t h e m echanic al c hara cte ris tic s o f s te el p ip e w it h rib s a nd w it h out rib s o f in clin ed s tr u t p ile s a re c om pare d . T he te st re su lt s
s h ow th at, th e
la te ra l re sis ta nce o f th e u p per p art o f th e in clin ed s tr u t p ile p la ys a ro le fir s t, a nd it s w ork in g c hara cte ris tic s
a re s im ila r to th ose o f th e fr ic tio n p ile ; th e u lt im ate b earin g c ap acit y o f th e te st p ile is a b out 1 4 00 k N , a nd th e lim it v a lu e
o f th e s id e fr ic tio n re sis ta nce o f th e c em ent- s o il- s o il in te rfa ce a ro und th e p ile in th e s ilt la ye r is a b out 8 0 k P a, a t w hic h tim e
t h e c orre sp ond in g s id e
fr ic tio n re sis ta nce o f th e c em ent- s o il- s te el p ip e in te rfa ce is a b out 1 65 k P a; th e d is tr ib utio n la w o f
s id e fr ic tio n re sis ta nce o f in ner c ore s te el p ip e a nd c em ent- s o il is c onsis te nt, a nd it s ra tio is a b out th e ra tio o f c em ent- s o il
t o o ute r d ia m ete r o f s te el p ip e; w heth er th e s te el p ip e is rib bed o r n ot h as lit tle e ffe ct o n th e c hang e o f th e m echanic al
c hara cte ris tic s o f in clin
同步同心式斜撑桩侧摩阻力现场试验研究（论文）.pdf
