CRTSⅢ型板式无砟轨道施工布板计算模型研究

为了实现施工布板数据处理的智能化,提高CRTSⅢ无砟轨道结构的适应性和推广应用范围,对CRTSⅢ无砟轨道施工布板计算中关键技术进行研究,建立通用的施工布板计算模型。该计算模型首先根据CRTSⅢ轨道结构断面中主要存在的3个不同倾斜度定义3个基准面,即钢轨顶面基准面、板顶面基准面以及承轨台基准面。再通过定义的基准面定义3个基准点,根据断面点与基准点的相对几何关系,建立特定的横断面模型。任意里程处任意断面点理论坐标计算时,先计算出基准点坐标,再根据横断面模型计算断面点坐标。采用上述模型研制的"CRTSⅢ型板式无砟轨道布板设计与定位测量系统"施工布板模块具有横断面模型的建立与参数计算功能,可用于CRTSⅢ型板式无砟轨道系统建造时自动计算各类结构层放样数据,包括支撑层、底座板钢模板及轨道板边线放样及精调理论数据计算,还可以进行轨道板灌注后复测评估,实现CRTSⅢ轨道板施工布板计算的智能化。

Research on the Calculation Model of Plate Layout and Construction for CRTSⅢ Ballastless Track

In order to realize intelligently the data processing of plate layout and construction and improve CRTSⅢ ballastless track structure's adaptability and extend its application,this paper studies the key technologies of the layout and construction calculation and establishes a general calculation model for layout and construction. In this model,three reference planes namely the rail top surface,the plate top surface and the support rail groove top surface are defined according to the existed three different inclinations in CRTS Ⅲ ballastless track structure. Then three datum points are defined through the reference surfaces and the specific section model is established according to the relative geometric relationship between the section point and reference point. The first step to calculate the coordinate of any section point at any mileage is to calculate the coordinate of the datum point,and then calculate the section point according to the cross-section model. The construction layout model of "CRTSⅢ ballastless track plate layout design and positioning measurement system"has the function to establish cross section model and calculate parameters. It can be used for automatic calculation of sampling data for all kinds of structure layer in ballastless track system construction period,including lofting data of the support layer,steel template of the base plate,track plate sideline and accurate adjustment of the theoretical data of plate,and it can also be used to assess track smoothness after track plate perfusion.