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A platform for research: civil engineering, architecture and urbanism
Settlement Characteristic Due to Excavate Parallel Tunnels in a Fill-rock Slope: Model Test and Numerical Analysis
Abstract The settlement caused by excavating twin tunnels on a slope is regarded as a critical aspect in assuring asymmetric twin tunnel safety. In this paper, both physical model test and numerical analysis (FEM) were carried out to investigate the settlement and stress characteristics due to excavation of twin tunnels in a fill slope. First, a small scale 3D model (prototype) test was constructed to study the maximum settlement points and the vertical stress distribution during the excavation. Then, a numerical model was implemented based on the physical model for verifying the settlement and stress response obtained from the model test. The results show good agreement between the model test results and the numerical analysis. In addition, the interaction between three tunnels have been investigated numerically in two different configurations using four sequential excavations to investigate the influence of this sequence on the settlement behavior. The results of the interaction process between the three tunnels have been revealed that different cover depth of the slope in different sections cause a variation in the settlement value. However, excavating the three tunnels at the same time cause the maximum settlement value in the whole sections and scenarios.
Highlight A model test with numerical simulation for twin tunnels in a (fill -rock) slope has been done.The settlement due to excavate the twin tunnels has been investigated.The interaction between three tunnels also has been included in this paper in two main scenarios:The first one when the three tunnels are at the same level (located on the same line).The second one when the three tunnels make a triangle configuration.
Settlement Characteristic Due to Excavate Parallel Tunnels in a Fill-rock Slope: Model Test and Numerical Analysis
Abstract The settlement caused by excavating twin tunnels on a slope is regarded as a critical aspect in assuring asymmetric twin tunnel safety. In this paper, both physical model test and numerical analysis (FEM) were carried out to investigate the settlement and stress characteristics due to excavation of twin tunnels in a fill slope. First, a small scale 3D model (prototype) test was constructed to study the maximum settlement points and the vertical stress distribution during the excavation. Then, a numerical model was implemented based on the physical model for verifying the settlement and stress response obtained from the model test. The results show good agreement between the model test results and the numerical analysis. In addition, the interaction between three tunnels have been investigated numerically in two different configurations using four sequential excavations to investigate the influence of this sequence on the settlement behavior. The results of the interaction process between the three tunnels have been revealed that different cover depth of the slope in different sections cause a variation in the settlement value. However, excavating the three tunnels at the same time cause the maximum settlement value in the whole sections and scenarios.
Highlight A model test with numerical simulation for twin tunnels in a (fill -rock) slope has been done.The settlement due to excavate the twin tunnels has been investigated.The interaction between three tunnels also has been included in this paper in two main scenarios:The first one when the three tunnels are at the same level (located on the same line).The second one when the three tunnels make a triangle configuration.
Settlement Characteristic Due to Excavate Parallel Tunnels in a Fill-rock Slope: Model Test and Numerical Analysis
Liu, Xinrong (author) / Suliman, Lojain (author) / Zhou, Xiaohan (author) / Wang, Jiwen (author) / Linfeng, Wang (author) / Elmageed, Ahmed Abd (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
Study on Settlement of High Fill Embankments on Rock Slope under Complicated Stress Conditions
| British Library Conference Proceedings | 2012
Study on Settlement of High Fill Embankments on Rock Slope under Complicated Stress Conditions
| Trans Tech Publications | 2011
Development of a boom tunnelling machine to excavate 200 MPa rock
| British Library Conference Proceedings | 1997