CAJ | 학술논문

丹江口水利枢纽是南水北调中线水源工程,丹江口大坝河床坝段的防渗帷幕,已运行近40年,大坝加高后其运行条件发生变化,上游水头更高,须通过相应的试验研究对其耐久性做出客观评价.采取常规和加速老化试验方法,测试了老化前后丙烯酰胺(丙凝)胶体的质量和酰胺基团的变化及浸泡液中NH_4~+浓度、丙烯酰胺单体含量.试验结果表明,老化试验后丙凝胶体支链的部分酰胺基团发生了水解,但主链未发生水解,说明丙凝胶体耐久性较好.
단강구수리추뉴시남수북조중선수원공정,단강구대패하상패단적방삼유막,이운행근40년,대패가고후기운행조건발생변화,상유수두경고,수통과상응적시험연구대기내구성주출객관평개.채취상규화가속노화시험방법,측시료노화전후병희선알(병응)효체적질량화선알기단적변화급침포액중NH_4~+농도、병희선알단체함량.시험결과표명,노화시험후병응효체지련적부분선알기단발생료수해,단주련미발생수해,설명병응효체내구성교호.
Danjiangkou Hydroproject is the waterhead project of South-North Water Diversion. The anti-permeable grouting curtain of Danjiangkou Dam was constructed almost 40 years ago.The water pressure would become larger after the dam was heightened. So the durability of grouting curtain should be evaluated objectively by the corresponding tests. In this study, the conventional and accelerated aging tests were completed. The quality of the acrylamide gel and the change of amide group, as well as the concentration of ammonium ion and content of acrylamide monomer in the aging solution were measured before and after aging. The test results indicate that the amide group of side chain of acrylamide gel was hydrolyzed after aging tests, but the main chain of acrylamide gel was not. The durability of acrylamide gel was proved to be good by the results of the tests.