上海交通大学学报 ›› 2018, Vol. 52 ›› Issue (11): 1483-1491.doi: 10.16183/j.cnki.jsjtu.2018.11.010
赵高文,李镜培,李林,崔纪飞
发布日期:
2025-07-02
通讯作者:
李镜培,男,教授,电话(Tel.): 13901656003; E-mail: lijp2773@tongji.edu.cn.
作者简介:
赵高文(1988-),男,陕西省榆林市人,博士生,主要从事桩基设计理论及耐久性研究.E-mail:007gwzhao@tongji.edu.cn.
基金资助:
ZHAO Gaowen,LI Jingpei,LI Lin,CUI Jifei
Published:
2025-07-02
摘要: 利用室内试验模拟盐渍土地区混凝土灌注桩的腐蚀过程,对比研究灌注桩混凝土在半浸泡及全浸泡腐蚀环境下的劣化过程及硫酸盐扩散规律. 通过室内试验制备现浇混凝土试样,采用人工腐蚀环境,分别模拟全浸泡及半浸泡腐蚀作用方式下混凝土灌注桩的腐蚀过程,测定混凝土试件在1、3、6、9个月等不同腐蚀时间的尺寸、抗压强度变化及硫酸盐扩散深度,分析两种腐蚀作用下灌注桩现浇混凝土的劣化过程及差异,并探讨不同腐蚀方式对灌注桩混凝土中硫酸盐扩散的影响规律.结果显示,半浸泡与全浸泡腐蚀的灌注桩混凝土劣化过程差异显著;半浸泡的混凝土劣化速度显著快于全浸泡混凝土,强度损失也更严重;半浸泡混凝土同时遭受硫酸盐的化学及结晶腐蚀,液面附近表面发生较为严重的脱落并发生一定程度的膨胀;液面以上混凝土硫酸盐的扩散速度显著高于全浸泡下混凝土中硫酸盐的扩散.研究表明,灌注桩中处于地下水位活动范围的混凝土在硫酸盐腐蚀下的劣化速度较快,在较短时间内发生严重的损伤;全浸泡现浇混凝土则由于其环境较稳定,主要受到硫酸盐的化学侵蚀,损伤过程较慢.因此,在混凝土灌注桩抗硫酸盐腐蚀设计中,应重点考虑地下水位附近桩体混凝土的抗蚀性能.
中图分类号:
赵高文,李镜培,李林,崔纪飞. 腐蚀方式对灌注桩劣化及硫酸盐扩散规律影响[J]. 上海交通大学学报, 2018, 52(11): 1483-1491.
ZHAO Gaowen,LI Jingpei,LI Lin,CUI Jifei. Influence of Corrosion Forms on the Degradation Process and Sulfate Diffusion Laws of Cast-in-Situ Piles[J]. Journal of Shanghai Jiao Tong University, 2018, 52(11): 1483-1491.
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