哈大客运专线桥涵基础沉降观测分析与建议

研究目的:通过对铁路桥涵工后系统的沉降动态观测、实测沉降观测数据的分析与评估,评价桥涵基础最终沉降完成时间,合理确定无砟轨道铺设时间,确保客运专线无砟轨道结构铺设质量。针对沉降观测中遇到的一些特殊情况,经分析提出合理建议,以供类似工程借鉴。研究结论:通过对哈大客运专线运粮河特大桥基础进行的沉降观测,对沉降观测数据进行的分析与评估,采用曲线分析方法进行的曲线拟合,得出如下结论:双曲线拟合结果符合运粮河特大桥工程实际情况;易采用不锈钢螺旋式观测标志,4个观测标志点应分别设于墩身两侧四角处;采用同一仪器和观测方法定期对水准点进行复测,至少保证一个CPI或CPII点,可以提高沉降观测的精度。

Observation,Analysis and Suggestion to the Foundation Settlement of Bridges and Culverts of Harbin-Dalian Passenger Dedicated Line

Research purposes: Through the analysis and evaluation of the dynamic observation of the post-construction systematic settlement of the railway bridge and culvert and the observed data on the actually tested settlement,the completion time of the final foundation settlement of bridges and culverts is evaluated,and the paving time of the ballastless track is determined reasonably to ensure the paving quality of the ballastless track of Passenger Dedicated Line.To the special situation encountered in the settl...