离子侵蚀环境中砂浆锚固体锚固性能试验研究  

Experimental Study on Anchorage Performance of Mortar Anchorage Body in Ion Erosion Environment

作　　者：张凯程 杨文东[1] 王英男 刘德军[3] 马鹏程 Zhang Kaicheng;Yang Wendong;Wang Yingnan;Liu Dejun;Ma Pengcheng(College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao,Shandong 266580,P.R.China;Construction Promotion Center of Wetland City,Dongying,Shandong 257092,P.R.China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,P.R.China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]东营市湿地城市建设推进中心,山东东营257092 [3]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《地下空间与工程学报》2024年第S01期102-110,共9页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(52479113;51979281)。

摘　　要：长期处于海洋或滨海环境的锚固体系会受到离子侵蚀导致耐久性下降。为研究离子侵蚀环境中锚固体的锚固性能,本文通过室内试验,分析了不同腐蚀环境和不同腐蚀时间下普通锚固体和预应力锚固体的表面损伤、锚杆强度以及砂浆-锚杆界面间的粘结强度。结果表明:腐蚀龄期增加以及给锚杆施加预应力会加速锚杆的腐蚀;锚杆在腐蚀初期会在表面形成一层氧化膜,所以不同腐蚀溶液对锚杆的腐蚀效果不明显;施加了预应力的锚杆会对腐蚀龄期更敏感,其极限抗拉强度下降得更快;砂浆-锚杆界面间的粘结强度随着腐蚀龄期近似呈线性变化,施加预应力后,界面间粘结强度下降得更快;腐蚀溶液对砂浆-锚杆界面粘结强度起削弱作用的强弱顺序为混合溶液>硫酸钠溶液>氯化钠溶液。研究成果可为长期处在海洋和滨海环境中服役的锚固体系的耐久性研究提供依据。Anchorage body in long-term marine or coastal environments are subject to ionic erosion leading to durability degradation.In order to study the anchorage performance of anchorage body in ionic erosion environment,the surface damage,anchor strength,and bond strength between mortar and bolt of ordinary and prestressed anchorage body were analyzed under different corrosion environments and corrosion times through long-term immersion test.The results showed that the corrosion period and prestressing of the bolt accelerated their corrosion.In the initial stage of corrosion,an oxide film was formed on the surface of the bolt,so the corrosion effect of different corrosion solutions on the anchor rods was not significant.The bolt with prestress were more sensitive to the corrosion period,and their ultimate tensile strength decreases faster.The bond strength between mortar and bolt showed a linear change with the corrosion period,and the bond strength decreased faster with the increase of corrosion time if the bolt were prestressed.The weakening effect of corrosion solutions on the bond strength between mortar and bolt was in the order of mixed solution>sodium sulfate solution>sodium chloride solution.The research results can provide a basis for the durability study of anchorage body that serve in environments such as oceans and coastal saline soil for a long time.

关 键 词：水泥砂浆 化学腐蚀 腐蚀试验 预应力 硫酸盐 

分 类 号：TU476[建筑科学—结构工程]