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However, the risk in tunnel portal construction is complicated and uncertain which has made such a neural network very attractive to the construction projects. This paper presents a risk evaluation model, which is obtained from historical data of 50 tunnels, by combining the fuzzy method and BP neural network. The proposed model is used for the risk assessment of the Tiefodian tunnel. The results show that the risk evaluation level is IV, slope instability is the greatest impact index among four risk events, and the major risk factors are confirmed. According to the evaluation results, corresponding risk control measures are suggested and implemented. Finally, numerical simulation is carried out before and after the implementation of risk measures, respectively. The rationality of the proposed risk evaluation model is proved by comparing the numerical simulation results.<\/jats:p>","DOI":"10.1155\/2018\/8547313","type":"journal-article","created":{"date-parts":[[2018,8,29]],"date-time":"2018-08-29T14:14:14Z","timestamp":1535552054000},"page":"1-16","source":"Crossref","is-referenced-by-count":23,"title":["Risk Evaluation Model of Highway Tunnel Portal Construction Based on BP Fuzzy Neural Network"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6996-9758","authenticated-orcid":true,"given":"Xianghui","family":"Deng","sequence":"first","affiliation":[{"name":"School of Civil and Architecture Engineering, Xi\u2019an Technological University, Xi\u2019an 710032, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1992-5324","authenticated-orcid":true,"given":"Tian","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Civil and Architecture Engineering, Xi\u2019an Technological University, Xi\u2019an 710032, China"}]},{"given":"Rui","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Civil and Architecture Engineering, Xi\u2019an Technological University, Xi\u2019an 710032, China"}]}],"member":"311","reference":[{"key":"2","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-0114(83)80082-7"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1016\/0020-0255(75)90036-5"},{"year":"2007","key":"4"},{"issue":"30","key":"5","first-page":"793","volume":"30","year":"2009","journal-title":"Rock and Soil Mechanics"},{"key":"6","doi-asserted-by":"publisher","DOI":"10.1016\/j.ecolmodel.2003.11.014"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmatprotec.2005.03.030"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1016\/j.ssci.2011.08.042"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijar.2010.12.004"},{"key":"11","doi-asserted-by":"publisher","DOI":"10.1016\/j.ssci.2016.02.012"},{"key":"12","doi-asserted-by":"publisher","DOI":"10.1080\/014461996373296"},{"key":"13","doi-asserted-by":"publisher","DOI":"10.1080\/09613219508727476"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1139\/l92-061"},{"year":"1994","key":"15"},{"first-page":"535","volume-title":"A model of coal mine water disaster emergency logistics risk assessment based on AHP and BP neural network","year":"2012","key":"17"},{"key":"18","doi-asserted-by":"publisher","DOI":"10.1016\/j.autcon.2015.12.021"},{"key":"19","doi-asserted-by":"publisher","DOI":"10.1007\/s11771-012-1100-8"},{"key":"21","doi-asserted-by":"publisher","DOI":"10.1162\/neco.1989.1.4.465"},{"key":"22","doi-asserted-by":"publisher","DOI":"10.1016\/0893-6080(92)90012-8"},{"year":"2009","key":"23"}],"container-title":["Computational Intelligence and Neuroscience"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/cin\/2018\/8547313.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/cin\/2018\/8547313.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/cin\/2018\/8547313.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,5,20]],"date-time":"2020-05-20T01:27:13Z","timestamp":1589938033000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.hindawi.com\/journals\/cin\/2018\/8547313\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,8,28]]},"references-count":19,"alternative-id":["8547313","8547313"],"URL":"https:\/\/doi.org\/10.1155\/2018\/8547313","relation":{},"ISSN":["1687-5265","1687-5273"],"issn-type":[{"type":"print","value":"1687-5265"},{"type":"electronic","value":"1687-5273"}],"subject":[],"published":{"date-parts":[[2018,8,28]]}}}