A 1 g shaking table test of a shallow segmental mini-tunnel in sand is performed to investigate its dynamic responses. The properties of sand, the materials and design of the segmental tunnel, the construction process of testing models and the instrumentation scheme are introduced in full detail. Two levels of intensity and three typical central frequencies of idealized Ricker wavelets, making six cases of excitations, are applied to both the free-field model and the soil-tunnel model. Two white noise cases before and after the design-level cases are also performed to verify the dynamic characteristics of the models. Comprehensive results, including the acceleration responses of the two models, deformations at radial joints and in the diametral directions of the tunnel, bolt tensions between segments as well as strains of segments, are presented. The minutiae of the test are clarified to reduce uncertainties, and experimental results are carefully verified. It could be a benchmark test of segmental tunnels in dry sand ground by means of 1 g shaking table.

中文翻译：

---

沙地浅段微型隧道的基准1 g振动台测试

在砂中的浅段微型隧道进行了1 g振动台试验，以研究其动力响应。详细介绍了砂的特性，分段隧道的材料和设计，测试模型的构建过程以及仪表方案。理想化的Ricker小波的两个强度水平和三个典型中心频率（产生了六种激发）被应用于自由场模型和土洞模型。在设计级别案例之前和之后的两个白噪声案例也被执行，以验证模型的动态特性。给出了综合结果，包括两个模型的加速度响应，径向缝和隧道直径方向的变形，节段之间的螺栓张力以及节段的应变。澄清测试的细节以减少不确定性，并仔细验证实验结果。可以通过1 g振动台对干砂地面中的分段隧道进行基准测试。