软弱地层大型框架桥顶进高程波动控制探究

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。

Research on Elevation Fluctuation Control of Jacking in the Large Frame Bridge in Weak Ground

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.