Full‐waveform inversion has proved to be an effective and robust approach for near‐surface site characterization. Past full‐waveform inversion studies have mostly focused on Rayleigh wave, with only a few studies focussing on SH‐ and Love‐waves. Compared with Rayleigh waves, the main advantages of using SH‐ and Love‐waves are that they are more sensitive to mass density of materials and require much less computing time for simulation. In this study, we present an efficient SH‐ and Love‐wave full‐waveform inversion method to extract both S‐wave velocity and mass density of soil and rock. The method is based on the solution of 2D elastic SH‐wave equations and the adjoint‐state gradient approach with an implementation of Tikhonov regularization. We use synthetic and field experiments to test the capability of the method. The synthetic experiment indicates that the presented method can accurately characterize a challenging soil profiel represented by the presence of a velocity reversal along with variable layers of high and low S‐wave velocity and density. Variable layer interfaces, true S‐wave velocity and density values are well recovered. The field experiment successfully characterizes the subsurface structure to a depth of 18 m, that includes a soil layer underlain by limestone bedrock. Two invasive standard penetration tests were conducted to verify the inverted seismic results. The trend in depth of the standard penetration test N‐values generally agrees with the inverted results, including identification of a soft soil layer.

中文翻译：

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SH波和Love波的二维时域全波形反演，用于岩土现场表征

事实证明，全波形反演是一种有效且鲁棒的方法，可用于近地表位置表征。过去的全波形反演研究主要集中在瑞利波上，只有少数研究集中在SH波和Love波上。与瑞利波相比，使用SH波和Love波的主要优点是它们对材料的质量密度更加敏感，并且需要更少的计算时间来进行仿真。在这项研究中，我们提出了一种有效的SH波和Love波全波形反演方法，可同时提取S波速度和土壤和岩石的质量密度。该方法基于二维弹性SH波动方程和伴随状态梯度方法的求解，并带有Tikhonov正则化的实现。我们使用合成和现场实验来测试该方法的能力。综合实验表明，所提出的方法可以准确地描述具有挑战性的土壤剖面，其特征是存在速度倒转以及高和低S波速度和密度的可变层。可变层界面，真实的S波速度和密度值都可以很好地恢复。现场试验成功地将地下结构表征为18 m的深度，其中包括石灰岩基岩层下的土壤层。进行了两次侵入式标准穿透测试，以验证反演地震结果。标准渗透试验N值的深度趋势通常与反演结果一致，包括识别软土层。