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Model experiments for examining heaving phenomenon in tunnels

机译：洞洞现象研究的模型试验

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摘要

In recent years, heaving has occurred in pavement slabs in some expressway tunnels, adversely affecting road comfort and tunnel stability. When the heaving displacement is limited, the repair is limited to the overlay slabs. However, in the sections where the displacements are significant, the tunnel invert needs to be reconstructed and this brings many additional problems; for example, in reconstruction, traffic needs to be restricted which brings inconvenience to the public. In this study, model experiments as well as numerical analysis using the finite differential method (Code FLAC) were carried out to establish a rational measure facing to the heaving phenomenon. Based on the results of model experiments and numerical analysis, the validity of reproducibility of the model experiments has been examined, some characteristics of heaving phenomenon have been grasped, factors for estimating the heaving phenomenon in different loading patterns have been established. All these factors have important implications for future construction practice.
机译：近年来，一些高速公路隧道的人行道板发生起伏，对道路的舒适性和隧道稳定性产生不利影响。当升沉位移受到限制时，维修仅限于覆盖板。但是，在位移较大的区域，需要对隧道反演进行重建，这带来了许多其他问题。例如，在重建中，需要限制交通，给公众带来不便。在这项研究中，进行了模型实验以及使用有限差分法（代码FLAC）进行的数值分析，以建立面对沉陷现象的合理措施。基于模型实验的结果和数值分析，检验了模型实验的可重复性的有效性，掌握了升沉现象的一些特征，建立了估计不同加载方式下升沉现象的因素。所有这些因素对未来的施工实践具有重要意义。

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