腐蚀环境下预应力锚筋的耐久性试验研究

doi:10.13722/j.cnki.jrme.2014.0833

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Abstract In order to study the damage evolution rule of long-term performance of pre-stressed anchor structure，accelerated corrosion tests and material property tests of pre-stressed anchor bar are conducted in corrosion environment indoors. Based on test results，the influence laws of various factors such as corrosion pH，corrosion time，stress level，oxygen level，etc. on the corrosion appearance，corrosion weight per unit length and loss of mechanical properties of pre-stressed anchor bar are analyzed. The study results show that these influencing factors are closely related to the degree of corrosion and damage of pre-stressed tendons anchor. The influence law can be drawn as follows：(1) The longer the corrosion lasts，the more serious the degree of corrosion of pre-stressed anchor bar is. (2) The anchor bar corrodes significantly after acidic liquid immersion，and the smaller the corrosion pH is，the more serious the degree of corrosion of anchor bar is. While corrosion of anchor bar is not obvious after alkaline liquid immersion. (3) In strongly corrosive conditions，the higher the stress level is，the more serious the degree of corrosion of anchor bar is. 4) Under the conditions of weak corrosion，the extent of corrosion of anchor bar is closely related to oxygen level，and the anchor bar corrodes lightly in the environment with insufficient oxygen.

Key words： geotechnical engineering corrosion pre-stress anchor bar durability

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0833 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/Is1/3356

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