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1、路基变形监测作业指导书一、概述路基沉降及工后沉降是武广客运专线路基工程重点研究的内容，路基工程质量的成败也主要取决于对路基沉降及工后沉降的控制。武广客运专线无碴轨道要求路基工后沉降应满足下表要求，对无碴轨道路基，路基填筑施工完成后，至少有6个月的沉降观测和调整期，经系统分析评估，沉降稳定且工后沉降满足要求后方可铺设无碴轨道。控制路基工后沉降及不均匀沉降是无碴轨道的关键。路基工后沉降控制值表线路等级工后沉降沉降速率cm/年不均匀沉降cm/20m过渡段差异沉降形成的折角差异沉降错台cm一般地段cm桥尾过渡段
2、cm无碴轨道200km/h以上3//2＜1/10000.5路基作为变形控制十分严格的土工构筑物，应进行沉降变形动态监测系统设计，并在施工期间进行系统的沉降监测与系统的分析评估，以保证工后沉降控制精度。通过变形监测数据的综合分析与评估，验证或调整设计措施使路基地基处理达到设计规定的变形控制要求，分析推算地基的最终沉降量和工后沉降，确定无碴轨道铺设时间。同时，观测数据还可作为竣工验交时工后沉降控制量的依据。二、路基变形监测内容及布置原则ConferenceisbyCouncilpartyresearchde
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