Development of coupled centrifuge-numerical modelling to achieve a global tunnel-soil-structure interaction analysis
开发耦合离心机数值模型以实现全局隧道-土壤-结构相互作用分析
基本信息
- 批准号:EP/K023020/1
- 负责人:
- 金额:$ 12.78万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2013
- 资助国家:英国
- 起止时间:2013 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The use of underground space for infrastructure development is vital for the growth of modern cities. This is clearly demonstrated by the significant investment in the Crossrail project in London, UK. Tunnelling has evolved into a sophisticated construction process involving the use of automated equipment and specialist materials. The use of modern methods does not, however, prevent the unavoidable result of ground deformations caused by tunnelling. In modern cities, where underground space is limited due to the abundance of buried infrastructure, it is important to understand the effects of tunnelling on nearby buried infrastructure and above-ground structures.The analysis of the effect of tunnelling on above-ground structures is an extremely complex soil-structure interaction problem. The problem involves the behaviour of the tunnel, the soil, the above-ground structure, and the highly non-linear interactions that occur between the soil and structural components. Analysis of individual domains (i.e. the soil or structure in isolation) can provide some indication of overall behaviour but it does not give a true representation of the global system. Modern design and research tools, such as numerical and geotechnical centrifuge modelling, have the ability to accurately model the soil or structural domains individually but struggle to replicate the global behaviour of large complex systems involving soil-structure interactions.This project will develop a method in which geotechnical centrifuge and numerical modelling techniques are coupled together in such a way as to take full advantage of the respective strengths of each technique in order to obtain an accurate global solution to the tunnel-building interaction problem. The project considers a specific scenario in which a tunnel is constructed beneath a building on a piled foundation. The University of Nottingham geotechnical centrifuge is used to model the tunnel-soil-piled foundation domain. The geotechnical centrifuge allows testing of small-scale models of full-scale prototypes within a controlled laboratory environment and replicates complex soil and soil-structure interaction behaviour. The centrifuge is necessary to increase the weight of the soil in the small-scale model so that ground stresses and behaviour in the model match those in the full-scale prototype; for example a 0.1m deep section of soil in the centrifuge model weighs the same as 10m of the same prototype soil when the centrifuge is spun to give an acceleration field equivalent to 100 times earth's gravity in the model. The centrifuge model can provide a more realistic simulation of the tunnelling induced displacements and resulting soil-structure interactions than a numerical model.For the tunnel-building problem, a numerical model is used to solve the foundation-building domain. Various complexities of this domain are considered, such as the building-foundation connections, building stiffness, and material behaviour. The numerical model will provide an accurate simulation of a building which would be very difficult to achieve in a scaled centrifuge model.The centrifuge and numerical models will be coupled through a data interfacing system which will pass information of pile displacements and loads between the models in real-time. This interfacing means that the interactions between the physical model in the centrifuge and the numerical model are captured and that the global tunnel-soil-foundation-building system behaviour is modelled correctly.The successful completion of this project will represent a significant step in improving modelling methods to study the tunnel-structure interaction problem and will provide valuable information to help improve the understanding of this complex and important construction scenario.
利用地下空间进行基础设施建设对现代城市的发展至关重要。英国伦敦Crossrail项目的重大投资清楚地证明了这一点。隧道施工已经发展成为一个复杂的施工过程,涉及使用自动化设备和专业材料。然而,现代方法的使用并不能防止隧道施工引起的不可避免的地面变形。在现代城市中,地下空间由于大量的地下基础设施而受到限制,因此了解隧道施工对附近地下基础设施和地上建筑物的影响是非常重要的,隧道施工对地上建筑物的影响分析是一个极其复杂的土-结构相互作用问题。这个问题涉及隧道、土壤、地上结构的行为,以及土壤和结构部件之间发生的高度非线性相互作用。对单个域(即孤立的土壤或结构)的分析可以提供一些总体行为的指示,但它并不能真实地代表全球系统。现代设计和研究工具,如数值和土工离心模型,有能力准确地模拟土壤或结构域单独,但很难复制涉及土壤的大型复杂系统的全球行为,本项目将开发一种方法,将土工离心和数值模拟技术结合在一起,以充分利用各自的优势,每种技术的优势,以获得一个准确的全球解决方案的隧道建设相互作用的问题。该项目考虑了一个具体的情况下,隧道是在建筑物的桩基。诺丁汉大学的土工离心机被用来模拟隧道-土壤-桩基础域。土工离心机允许在受控的实验室环境中测试全尺寸原型的小尺寸模型,并复制复杂的土壤和土壤-结构相互作用行为。离心机是必要的,以增加土壤的重量在小比例模型,使地面应力和行为在模型中匹配的全尺寸原型;例如,0.1米深的土壤在离心机模型中的一部分重量相同的原型土壤10米时,离心机旋转,以提供一个加速度场相当于100倍地球重力的模型。离心模型比数值模型更能真实地模拟隧道开挖引起的位移以及由此引起的土-结构相互作用。这个域的各种复杂性被认为是,如建筑基础连接,建筑刚度,和材料的行为。数值模型可准确地模拟建筑物,这在按比例的离心模型中是很难做到的。离心模型和数值模型将通过一个数据接口系统连接起来,该系统将在模型之间实时传递桩位移和载荷的信息。这种接口意味着离心机中的物理模型和数值模型之间的相互作用被捕获,并且全球隧道-土壤-地基-建筑系统行为被正确建模。该项目的成功完成将代表着改进建模方法以研究隧道的重要一步。结构相互作用问题,并将提供有价值的信息,以帮助提高对这一复杂和重要的施工方案的理解。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Tunnelling and its effects on piles and piled structures
- DOI:
- 发表时间:2017-07
- 期刊:
- 影响因子:0
- 作者:A. Franza
- 通讯作者:A. Franza
A simplified elastic analysis of tunnel-piled structure interaction
- DOI:10.1016/j.tust.2016.09.008
- 发表时间:2017
- 期刊:
- 影响因子:6.9
- 作者:A. Franza;A. Marshall;T. Haji;A. Abdelatif;S. Carbonari;M. Morici
- 通讯作者:A. Franza;A. Marshall;T. Haji;A. Abdelatif;S. Carbonari;M. Morici
Centrifuge Modelling of Tunnelling beneath Axially Loaded Displacement and Non-Displacement Piles in Sand
- DOI:10.1061/9780784480441.060
- 发表时间:2017-03
- 期刊:
- 影响因子:0
- 作者:A. Franza;A. Marshall
- 通讯作者:A. Franza;A. Marshall
Centrifuge and Real-Time Hybrid Testing of Tunneling beneath Piles and Piled Buildings
- DOI:10.1061/(asce)gt.1943-5606.0002003
- 发表时间:2019-03
- 期刊:
- 影响因子:3.9
- 作者:A. Franza;A. Marshall
- 通讯作者:A. Franza;A. Marshall
Empirical and semi-analytical methods for evaluating tunnelling-induced ground movements in sands
- DOI:10.1016/j.tust.2019.02.016
- 发表时间:2019-06
- 期刊:
- 影响因子:6.9
- 作者:A. Franza;A. Marshall
- 通讯作者:A. Franza;A. Marshall
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Alec Marshall其他文献
Soviet experience of underground coal gasification focusing on surface subsidence
- DOI:
10.1631/jzus.a1500013 - 发表时间:
2015-10-01 - 期刊:
- 影响因子:3.900
- 作者:
Yury Derbin;James Walker;Dariusz Wanatowski;Alec Marshall - 通讯作者:
Alec Marshall
Alec Marshall的其他文献
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{{ truncateString('Alec Marshall', 18)}}的其他基金
Whole-life Cost Assessment of Novel Material Railway Drainage Systems
新型材料铁路排水系统的全寿命成本评估
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EP/M023028/1 - 财政年份:2015
- 资助金额:
$ 12.78万 - 项目类别:
Research Grant
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