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疏通岩溶隧道排水系统堵塞的清洗溶剂对结构的无损性测评 被引量:2
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作者 洪英维 《现代隧道技术》 EI CSCD 北大核心 2020年第4期219-228,共10页
岩溶地区隧道工程普遍存在岩溶结晶阻塞排水系统的问题,严重威胁隧道工程的结构安全及其长期运营。文章在疏通岩溶排水堵塞的清洗溶剂制备与效能研究基础上,确定了清洗溶剂为浓度2000 ppm、重铬酸盐指数为17.71%的单分子羧酸类有机酸溶... 岩溶地区隧道工程普遍存在岩溶结晶阻塞排水系统的问题,严重威胁隧道工程的结构安全及其长期运营。文章在疏通岩溶排水堵塞的清洗溶剂制备与效能研究基础上,确定了清洗溶剂为浓度2000 ppm、重铬酸盐指数为17.71%的单分子羧酸类有机酸溶剂,并开展选定清洗溶剂对隧道衬砌结构混凝土与排水系统PVC塑料纤维材料的无损性测评。首先开展有机酸溶剂浸泡混凝土试件的试验,评估溶剂对混凝土侵蚀的强度损伤状况。其次开展有机酸试剂溶液浸泡PVC排水板与塑料盲沟管的试验,从宏观角度和微观角度评估溶剂对隧道排水系统侵蚀的质量损失状况和腐蚀损伤状况。试验结果表明:单分子羧酸类有机酸溶剂的侵蚀降低了混凝土材料强度指标约7%~9%左右,单分子羧酸类有机酸溶剂对排水系统塑料材料几乎没有腐蚀损伤影响。 展开更多
关键词 岩溶隧道 单分子羧酸类有机酸 衬砌混凝土 PVC排水管 塑料盲沟管纤维丝 结构无损性
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Application of Non-destructive Testing to Evaluate the Performance of Bridges Structures
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作者 Diego Jesus de Souza Elaine Souza dos Santos +4 位作者 Eric Pianizolli Flor Gabriel Pereira Marinho Giovana Costa Reus Heloise Cristine Cezario Leticia Andrade Camara 《Journal of Civil Engineering and Architecture》 2017年第1期1-7,共7页
Bridges are important elements in road system and can influence the entire economy of cities and region. Usually, these structures have high financial investments for their constructions, in this way, maintenance and ... Bridges are important elements in road system and can influence the entire economy of cities and region. Usually, these structures have high financial investments for their constructions, in this way, maintenance and conservation become so important. Inspection is a technical activity that covers several operations, including performance analysis; examination; final performance report, other operations may be necessary, such as maintenance work, recovery, strengthening and rehabilitation. Technical examination together with some test methods allows a critical and parametric judgment of the bridge performance by minimizing the subjectivity of visual evaluations, and permits a more detailed diagnosis. This paper discusses the methodology to perform tests to complement the assessment recommended by DNIT (Brazilian National Department of Transport Infrastructure), which consists only on a visual judgment. This approach provides technical basis to classify the bridges as its need and urgency of maintenance. 展开更多
关键词 Non-destructive testing BRIDGES concrete durability.
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