摘要
通过对大型框架桥在顶进时期的外力分析,结合土体承载力小于100 kPa软弱地层顶进过程发生高程极端超标的工程实例,利用图表预测分析不同约束条件,不同受力工况,推理顶进施工偏差原因,归纳顶进施工常用的纠偏方法,并提出大型框架桥在软弱地层顶进过程有效控制高程产生较大波动的几种纠偏和预防措施。
The article, based on the analysis of exterior stress of the large frame bridge in jacking period, combined with the engineering example of extreme elevation exceeding in weak soil with bearing capacity less than 100 kPa, makes full use of charts to predict and analyzes various constraints, stress conditions, and reasons for deviation, and summarizes the corre- sponding counter measures. Hence put forward deviation rectifications and preventive measures for effective control of eleva- tion fluctuation of jacking process in weak ground.
出处
《铁道建筑技术》
2012年第11期65-69,共5页
Railway Construction Technology
关键词
大型框架桥
软弱地层
高程控制
分析
纠偏
large frame bridge
weak ground
elevation control
analysis
deviation rectification
