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首页> 外文期刊>Australian Geomechanics >LAYING THE FOUNDATION FOR THE SYDNEY LIGHT RAIL
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LAYING THE FOUNDATION FOR THE SYDNEY LIGHT RAIL

机译：为悉尼轻轨奠定基础

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The Sydney Light Rail project alignment covers the typical geological and geomorphological settings for the Sydney and Botany Basin. This comprises three distinctive zones: (1) manmade fill; (2) recent Quaternary aeolian, alluvial and estuarine sediments, which overlie; (3) residual soil and weathered to fresh bedrock. When investigating subsurface conditions within a metropolitan area, various constraints can have impacts on the scope and extent of geotechnical investigations that can be safely and practically completed. For the SLR project, investigation of the subgrade conditions along the alignment was significantly constrained due to the route which follows existing roads through the CBD and eastern suburbs. Constraints for working in these areas included complex traffic management planning to avoid disruptions to the community and also an equally challenging network of underground utilities and other service tunnels. These constraints required thorough planning for traffic management and consultation with utility service providers, thus significantly reducing the amount of work that could be completed within the program.A robust geotechnical validation regime was developed so that the in-situ subgrade could be re-assessed prior to track slab construction, to mitigate the limited extent of geotechnical investigation undertaken. The objective of the site validation regime was to verify the inferred design subgrade California Bearing Ratio values along areas where geotechnical investigation was constrained. The site validation regime included nominally spaced plate load testing, dynamic cone penetrometer testing and laboratory CBR testing to assess the subgrade CBR value. This paper explains the challenges faced in validating in-situ CBR in different subgrade conditions, appropriateness of published DCP to CBR empirical methods and the approach using calibrated site specific DCP-CBR correlations.
机译：悉尼轻轨项目对齐涵盖悉尼和植物盆地的典型地质和地貌环境。这包括三个独特的区域：（1）人造填充; （2）最近的四季季，举起的偏离和河口沉积物，其覆盖; （3）残留的土壤和风化到新的基岩。在调查大都市区内的地下条件时，各种约束可能会对可以安全和实际完成的岩土性调查的范围和程度影响。对于SLR项目，由于路由通过CBD和东部郊区的现有道路，对沿着对齐的路基条件的调查受到显着限制。在这些领域工作的约束包括复杂的交通管理计划，以避免对社区中断以及地下实用程序和其他服务隧道的同等挑战性网络。这些限制要求与公用事业服务提供商进行交通管理和咨询所需规划，从而大大减少了可以在计划内完成的工作量。开发了强大的岩土验证制度，以便先前重新评估原位路基追踪板坯建设，减轻岩土工程调查的有限程度。现场验证制度的目的是验证地岩石调查受到限制的地区的推断设计路基加利福尼亚轴承比值。站点验证制度包括名义上间隔的板载测试，动态锥形光敏度计测试和实验室CBR测试，以评估路基CBR值。本文解释了在不同路基条件下验证原位CBR的挑战，公开的DCP对CBR实证方法的适当性以及使用校准点特异性DCP-CBR相关的方法。

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