百米箱形高墩柱模型试验与分析  

Model Test and Analysis of 100 M High Box Pier Column of Qingshui River Bridge of Nanning—Kunming Railway

作　　者：张开敬[1,2] 马庭林[1,2] 童兵[1,2] 

机构地区：[1]西南交通大学 [2]铁道部第二勘测设计院

出　　处：《桥梁建设》1997年第2期49-54,共6页Bridge Construction

摘　　要：南昆线清水河大桥主跨为７２ｍ＋１２８ｍ＋７２ｍＰＣ连续刚构桥，其４号墩高１００ｍ，是国内最高的铁路桥墩。为了检验设计，进行了１／１４缩尺的变截面箱形高墩柱的模型试验。试验结果表明，在使用荷载和最不利施工荷载下，控制截面混凝土和钢筋应力以及墩顶水平挠度的实测值与计算值符合良好。破坏试验说明，高墩柱具有足够的安全储备。The main spans of Qingshui River Bridge of Nanning—Kunming Railway are of a PC rigid frame continuous bridge with the span arrangement being (72+128+72)m. The pier No.4 of the bridge is 100 m high, which is the highest among the piers of railway bridges in China. In order to check the design of the pier, the models of high pier column with variable box section to a scale of 1/14 are tested. As indicated in the test results, under service and the most adverse construction load, the measured values of dominant stresses of concrete and rebar in the box section and of horizontal deflection of pier top are found well coincident with the calculated values, and as further proved in the failure test, the safety margin of the high pier clumn is adequate.

关 键 词：箱形高墩柱 清水河大桥 模型试验 连续刚构桥 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]