隧道内流水对联络通道冻结效果影响分析  

Analysis of Influence of Flowing Water in Tunnel on Freezing Effect of Cross Passage

作　　者：王承晶 张勇 朱成山 韩翔 WANG Chengjing;ZHANG Yong;ZHU Chengshan;HAN Xiang(School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116)

机构地区：[1]中国矿业大学力学与土木工程学院,徐州221116

出　　处：《现代隧道技术》2020年第4期113-118,共6页Modern Tunnelling Technology

摘　　要：为分析地铁联络通道冻结过程中隧道内流水对联络通道冻结效果的影响,文章以广州地铁某联络通道冻结施工为例,通过工程实测与数值模拟,分析了隧道内流水对管片与土体交界处温度及土体温度的影响。结果表明:当隧道内有流水时,对上部管片与土体交界处的温度影响不大,下部管片与土体交界处的温度会明显升高,且越靠近隧道底部,平均温度相差越大;相同深度流水上游管片与土体交界处平均温度明显高于下游;当隧道内流水流速度变大时,管片与土体交界处平均温度升高,且流水速度对下游平均温度的影响明显大于上游;冻结过程中,隧道内流水对管片壁后2 m深度内的土体温度产生影响。Aiming at the effect of flowing water in tunnel on freezing effect of cross passage during freezing process,it analyzes the effect of flowing water in tunnel on the temperature of the junction between segment and soil mass and the temperature of soil mass through the data measurement and numerical simulation by taking the construction of certain cross passage of Guangzhou metro as an example.The results show that there is almost no change of the temperature of the junction between the upper segment and soil mass but the temperature of the junction between lower segment and soil mass rises obviously and the closer to the tunnel bottom the larger of the difference of average temperature under the condition of flowing water in tunnel;average temperature of the junction between segment and soil mass in the upper reaches is obviously larger than that of lower reaches under the same depth of flowing wa⁃ter;when the flow velocity turns larger,the average temperature of the junction between segment and soil mass rises and the effect of flow velocity on the average temperature in the lower reaches is obviously larger than that of the up⁃per reaches;the flowing water has effect on the temperature of soil mass within 2 m depth at the back of segment in the course of freezing.

关 键 词：地铁 联络通道 冻结法 隧道内流水 管片与土体交界处温度 土体温度 数值模拟 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]