通过新型物理建模系统了解盾构隧道从沉降到接缝行为的纵向性能

IF 6.7 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Tunnelling and Underground Space Technology Pub Date : 2024-10-28 DOI:10.1016/j.tust.2024.106149
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引用次数: 0

摘要

除沉降槽外,脱位和开洞等接缝行为对决定盾构隧道的纵向性能也起着举足轻重的作用,但无论是在现场还是在按比例试验系统中,对这些接缝行为的研究都较少。本文提出了一种新的物理建模系统,重点是在一次试验中捕捉盾构隧道的纵向沉降槽和周向接缝行为。测试结果与现场数据进行了比较,显示出相似的变化趋势和幅度。利用这一新提出的测试系统,我们重新审视了差异沉降槽下接缝错位和开口之间的关系,并揭示了这两种接缝行为的比例对最大沉降槽的响应。结果表明,在较小的沉降水平下,环间错位的发展比接缝张开更为突出,而随着沉降的增加,接缝张开的比例会更高。此外,还观察到差异沉降与接缝错位之间存在适度的线性相关关系,而差异沉降与接缝开裂之间没有明显的相关关系。此外,论文还讨论了利用该系统测量隧道隆起或径向接缝变形时传感器位置的调整问题。总之,物理建模系统具有良好的工作性能和较高的测量精度,能够在各种条件下更精确地评估隧道变形和细化结构行为。
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Understanding the longitudinal performance of shield tunnel from settlement to joint behavior by a novel physical modeling system
Apart from the settlement trough, the joint behavior in terms of dislocation and opening plays a pivotal role in determining the longitudinal performance of shield tunnel, while they have been less tackled neither on the site nor in the scaled test system. This paper proposes a novel physical modeling system with the emphasis on capturing both the longitudinal settlement trough and circumferential joint behavior of shield tunnel in one test. The test results have been compared with field data, exhibiting similar trends and magnitudes of change. Utilizing this newly proposed test system, relationship between joint dislocation and opening under differential settlement trough is closely revisited and the proportion of these two joint behaviors could be revealed as the responses to the maximum settlement of the troughs. Results show that the development of dislocation between rings is more prominent than joint opening at a small level of settlement and a higher proportion of joint opening would occur as the settlement increases. Besides, a modest linear correlation between the differential settlement and joint dislocation is observed, whereas no clear correlation is evident between the differential settlement and joint opening. Additionally, the paper discusses the adjustments for sensor position when utilizing this system to measure the tunnel heave or radial joint deformation. Overall, the good working performance and high measuring accuracy of the physical modeling system can enable more precise evaluations of tunnel deformation and refined structural behavior under various conditions.
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来源期刊
Tunnelling and Underground Space Technology
Tunnelling and Underground Space Technology 工程技术-工程:土木
CiteScore
11.90
自引率
18.80%
发文量
454
审稿时长
10.8 months
期刊介绍: Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.
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