包晓光李振国张洋

摘要：为满足高速列车安全、舒适性的需要，保证线路的高平顺性，无碴轨道的铺设与运营对路基、桥涵、隧道等线下结构的工后沉降要求非常严格，追求“零沉降”理念。以大西铁路客运专线为基础，系统地介绍了线下结构物沉降变形观测关键技术，数据管理与分析预测系统，提出了工后沉降的预测方法及评估条件与标准，合理确定无碴轨道开始铺设时间，以保证客运专线无碴轨道结构铺设的质量。并提出了一些体会和建议，为正在建设的无砟轨道客运专线提供借鉴。

关键词: 客运专线无砟轨道；沉降变形观测；分析评估；无碴轨道铺设条件

Abstract: to meet the high speed train safety, comfort the need, ensure the line GaoPingShun sex, without the laid of ballastless track and operations of subgrade, Bridges, and tunnels offline structure of the settlement after work are very strict, the pursuit of "zero settlement" concept. Onishi in railway passenger special line as the foundation, introduces the structures below the settlement deformation observation key technology, data management and analysis and prediction system, puts forward the of post-construction settlement prediction method and evaluation of the conditions and standards, reasonably determine the ballastless track start laying without time, to ensure that no special passenger line of ballastless track structure of laying quality. And put forward some experience and Suggestions for the construction of a frantic jumble is no rail passenger special line for reference.

Keywords: special passenger line frantic jumble no tracks; Settlement and deformation observation; Analyzing the evaluation; No ballastless track laid condition

中图分类号：K826.16文献标识码：A 文章编号：

引言

高铁客运专线无碴轨道对工程的工后沉降要求严、标准高，要求线下工程工后沉降和差异沉降必须满足铺设无碴轨道的需要，工后沉降的预测是以施工中的沉降变形观测数据为基础，通过统计拟合分析来实现的。而沉降观测及其分析评估作为沉降控制的核心和关键，是判定线下工程工后沉降是否达到设计预期值的唯一依据，也是决定无碴轨道铺设时间的关键。

为加强线下工程沉降变形观测的管理，保证顺利、有效地完成施工期的沉降变形观测工作，准确预测线下工程的工后沉降量，确保工程质量，依据《客运专线铁路无碴轨道铺设条件评估指南》、《客运专线无碴轨道铁路工程测量暂行规定》（铁建设【2006】189号）、《大西客专（原平至西安段）线下工程沉降变形观测及评估方案》等标准制定本测量与数据处理方法。……