哈大客运专线桥涵基础沉降观测分析与建议  

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

作　　者：杨吉新[1] 李佳明[1] 

机构地区：[1]武汉理工大学,武汉430063

出　　处：《铁道工程学报》2010年第1期38-41,共4页Journal of Railway Engineering Society

基　　金：国家高技术研究发展计划(863)项目(2007AA11Z107);国家自然科学基金项目(10372075)

摘　　要：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。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 settlement observation, some suggestions are put forward for providing the reference to the similar works. Research conclusions： From the observation of the settlement of Yunliang Grand Bridge of Harbin - Dalian Passenger Dedicated Line, and the analysis and evaluation of the settlement observed data, it is concluded by using curve fitting of the curve analysis method that the fitting result of double curves conforms to the real situation of Yun｜iang Grand Bridge, the stainless steel spiral observation mark should be used and four observation marks should be separately installed on four comers on both sides of the bridge pier, and the repeated observation should be conducted to the benchmark （ at least one CPI point or one CPII point） at fixed time by the same device and same method for improving the settlement observation accuracy.

关 键 词：客运专线 沉降 曲线拟合 建议 

分 类 号：U443.1[建筑科学—桥梁与隧道工程]