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首页> 外文期刊>Australian Geomechanics >GEOTECHNICAL ASPECTS OF THE NARROWS BRIDGE DUPLICATION
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GEOTECHNICAL ASPECTS OF THE NARROWS BRIDGE DUPLICATION

机译：窄桥双重工程的岩土工程方面

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摘要

Aspects of the Narrows Bridge Duplication Design are presented including a general introduction to the Geology and seismic risk of the Perth City area. An overview of the original bridge geotechnics and design (late 1950s) is given, in addition to a discussion of what effects the site reclamation works for the original bridge have had on the design of the Duplication. Characterisation of the subsurface profile (strata and materials) for the Bridge Duplication Design is described, together with comment on the site investigation. Soil analysis models used for design and typical foundation details are presented, together with consideration of pile design loads including earthquake and liquefaction. Details of the pile load testing are given together with pile load test results. Comparison is also made between the geotechnical investigations for the original bridge and Duplication. One of the geotechnical issues addressed for the Duplication is the execution, reporting and review of the geotechnical monitoring before and during the project construction period. Concern had been expressed about possible ground movements and potential detrimental influence on the existing bridge foundations, associated with the proposed piling and bridge construction works. The contract required monitoring of settlements and lateral movements, as well as land survey of the existing bridge, to ensure that the new bridge was constructed in a manner that did not have any significant impact on the existing structure. Inclinometers, settlement gauges, and Sondex settlement monitoring systems were surveyed over a period of nearly two years to enable continuous assessment of the impact of the various phases of construction on the existing structure. The paper discusses issues concerning the nature and performance of the monitoring systems, the data obtained and an overview of the ground and bridge deflections that were observed.
机译：介绍了窄桥复制设计的各个方面，包括对珀斯市区的地质和地震风险的一般介绍。除了讨论原始桥梁的岩土工程和设计（1950年代后期）外，还讨论了原始桥梁的填海工程对复式设计的影响。描述了桥梁复制设计的地下轮廓（地层和材料）的特征，以及对现场调查的评论。提出了用于设计的土壤分析模型和典型的基础细节，并考虑了包括地震和液化在内的桩设计载荷。给出了桩载荷测试的详细信息以及桩载荷测试结果。还对原始桥梁和复制的岩土工程研究进行了比较。在重复中解决的岩土工程问题之一是在项目建设期间和之前对岩土工程监测进行执行，报告和审查。人们对可能的地面运动和对现有桥梁基础的潜在不利影响表示关注，这与拟议的打桩和桥梁建设工程有关。合同要求对定居点和横向运动进行监控，并对现有桥梁进行土地测量，以确保新桥的建造方式不会对现有结构产生任何重大影响。在近两年的时间里对测斜仪，沉降仪和Sondex沉降监测系统进行了调查，以能够持续评估施工各个阶段对现有结构的影响。本文讨论了有关监视系统的性质和性能，获得的数据以及观察到的地面和桥梁变形的概述的问题。

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