| 摘要: |
| 利用X射线CT技术对复杂地下水环境下喷膜防水材料的损伤情况进行了研究，探讨了此方法在喷膜防水材料失效性判断中的有效性.以NaCl，Na2SO4，NaOH及两两混合溶液为介质，对喷膜防水材料进行浸泡腐蚀试验后再CT扫描，利用CT数和CT方差的变化来实现其失效性的评价.结果表明：上述3种单溶液中NaOH溶液对材料的损伤最大，NaCl溶液最小；溶液两两混合后对材料的损伤影响相比单溶液有所变化，但并非都增大；在两两混合溶液中，其中一种介质种类的改变会导致另一种介质的浓度对材料损伤的敏感度发生变化.由此可知，CT数和CT方差可以作为喷膜防水材料损伤评价方法的有效指标. |
| 关键词: 复杂地下水环境 喷膜防水材料 X射线CT技术 失效性 损伤 |
| DOI：103969/jissn1007 9629201405026 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51178401，51108385）；国家重点基础研究发展计划（973计划）项目（2010CB732105） |
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| Experiment of CT Test of Damage of Spray Membrane Waterproof Material in Complicated Groundwater Environment |
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YANG Qixin1, WANG Qingguo1, JIANG Yajun1, ZHENG Shangfeng2, XU Peng3
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1.Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University,Chengdu 610031, China;2.China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;3.Hongrun Construction Group Co., Ltd., Shanghai 200235, China
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| Abstract: |
| Damage of spray membrane waterproof material in the complicated groundwater environment was studied by using X ray computed tomography （CT） and the validity of deciding the failure of the material was explored. With NaCl, Na2SO4, NaOH solution and the mixture of any two solutions, the spray membrane waterproof material was scanned by CT after immersion corrosion test of the material and the failure of the material was evaluated by using the change of CT number and CT variance. The results show that when the waterproof material is immersed in three kinds of single solutions respectively, the damage of the material in NaOH solution is the most serious and that in NaCl solution is slightest. After any two of the three solutions are mixed, the effect on the damage of the material is changed, but the damage is not all increased compared with the single solution; in the mixture of any two solutions, if the type of solution is changed, the sensitivity to concentration of another solution on the damage of the material will vary. CT number and CT variance can be regarded as efficient indices for evaluating the damage of the spray membrane waterproof material. |
| Key words: complicated groundwater environment spray membrane waterproof material X ray computed tomography（CT） failure damage |
