铁路隧道新型防护门门框及门框墙抗爆安全性研究  

Study on Anti-blast Safety of Doorframe and Its Wall of New Protective Door for Railway Tunnel

作　　者：王志伟 马伟斌 WANG Zhiwei;MA Weibin(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2020年第9期60-64,共5页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划(K2018G013);中国铁道科学研究院集团有限公司基金(2019YJ027)。

摘　　要：从受力最不利情况考虑,以面积最大的FSP-3642-Ⅰ型防护门为研究对象,将极限峰值为0.1 MPa的爆炸动荷载转化为均布等效静荷载,建立铁路隧道新型防护门门框与门框墙的数值模型,对其抗爆安全性进行了分析。结果表明:预埋式门框和锚固式门框的最大应力和最大位移均出现于闭锁孔位置;预埋式门框、锚固式门框的安全系数分别为7.60和9.09,最大位移分别为0.066 mm与0.028 mm;门框墙的最小安全系数为2.01,最大位移为0.067 mm。2种门框和门框墙均满足极限峰值为0.1 MPa的爆炸动荷载作用下的强度要求。Considering the most unfavorable situation of stress and taking FSP-3642-I protective door with the largest area as the research object,the explosive dynamic load with the limit peak value of 0.1 MPa was transformed into uniform equivalent static load.The numerical model of new protective doorframe and its wall of railway tunnel was established,and its antiexplosion safety was analyzed.The results show that the maximum stress and maximum displacement of embedded doorframe and anchored doorframe appear at the position of closed lock hole.The safety factors of embedded doorframe and anchored doorframe are 7.62 and 9.09 respectively,and the maximum displacement is 0.066 mm and 0.028 mm respectively.The minimum safety factor of doorframe wall is 2.01 and the maximum displacement is 0.067 mm.Both the doorframes and its walls meet the strength requirements under the explosive dynamic load with the ultimate peak value of 0.1 MPa.

关 键 词：铁路隧道 抗爆 数值计算 防护门 门框墙 安全性 

分 类 号：U458[建筑科学—桥梁与隧道工程]