杭甬高速铁路线下工程沉降变形评估

Assessment of Underline Engineering Settlement of Hangzhou-Ningbo Passenger Railway

高速铁路无砟轨道线下工程工后沉降分析、预测及评估是高速铁路建设的一项重要技术要求,国内外尚无成熟的经验。通过对杭甬铁路客专线下工程构筑物进行变形分析,介绍目前常用的几种评估预测方法,并利用不同的预测方法进行工后沉降预测,分析其适用性。结果表明,使用曲线回归法进行不同结构物沉降分析预测,相对而言,路基段曲线拟合通过率较高,桥梁段次之,隧道段最低,指数曲线法及双曲线法相对适应性较好。

It is an important technical requirement to analyze,predicate and assess the settlement after construction of ballastless tracks of high speed railway.Up to now,there is no mature experience of this kind of technology in China or abroad.This article introduces some different ways that are commonly used for the assessment and prediction.These methods have been used to predicate the settlement after construction of Hangzhou-Ningbo passenger railway project and to analyze the deformation of the structure.Practical applicability of these methods is also discussed.It is indicated that,relevantly speaking,the curve regression method is firstly most suitable for railway beds,and secondly for bridge,and thirdly for tunnel.Both the exponential curve method and the hyperbolic method are relevantly good ways for predicating the settlement after construction of railway beds,bridges and tunnels.