CAJ | 학술논문

喷射混凝土结构是隧道支护的重要组成部分。位于海洋环境中的隧道工程，势必遭受氯离子的侵蚀。采用室内浸泡的方法模拟海洋水下环境，以喷射混凝土与普通混凝土中氯离子扩散性能差异为核心，主要研究混凝土施工方式对混凝土中氯离子扩散性能的影响。试验结果表明：施工方式对混凝土的抗氯离子渗透性能影响显著。相对于普通混凝土，喷射混凝土毛细吸附区深度略大，氯离子浓度峰值约为普通混凝土的2.51倍，氯离子扩散速率较大。加入钢纤维后，喷射混凝土抗氯离子渗透性能有所提高。运用Fick第二定律对喷射混凝土中氯离子含量进行非线性拟合，具有良好相关性，并初步建立了喷射混凝土与普通混凝土氯离子扩散系数的关系。
분사혼응토결구시수도지호적중요조성부분。위우해양배경중적수도공정，세필조수록리자적침식。채용실내침포적방법모의해양수하배경，이분사혼응토여보통혼응토중록리자확산성능차이위핵심，주요연구혼응토시공방식대혼응토중록리자확산성능적영향。시험결과표명：시공방식대혼응토적항록리자삼투성능영향현저。상대우보통혼응토，분사혼응토모세흡부구심도략대，록리자농도봉치약위보통혼응토적2.51배，록리자확산속솔교대。가입강섬유후，분사혼응토항록리자삼투성능유소제고。운용Fick제이정률대분사혼응토중록리자함량진행비선성의합，구유량호상관성，병초보건립료분사혼응토여보통혼응토록리자확산계수적관계。
Sprayed concrete structure is an important part of tunnel support.Located in the marine environment tunnel project is bound to suffer the erosion of chloride ions.Amethod to simulate the indoor soaking underwater marine environment to spray concrete chloride ion diffusion performance difference with ordinary concrete core,concrete way affect the main chloride diffusion of concrete performance.The test results show that construction methods on the performance of concrete resistance to chloride ion penetration significantly.Compared to ordinary concrete,shotcrete depth slightly largercapillary adsorption zone,the chloride ion concentration peak of about 2.51 times that of ordinary concrete,the larger chloride ion diffusion rate.After the addition of steel fibers ,sprayed concrete resistance to chloride ion pene-tration increased.Fick's second law onthe use of sprayed concrete in chloride ion content in non-linear fitting,with good correlation,and the initial establishment of the sprayed concrete and ordinary concrete chloride ion diffusion coefficient of relationship.