Since 2009, 91 new strong‐motion stations were built for the renewal of the Swiss Strong Motion Network. Another nine stations will be installed until 2022. For each new station, an extensive site characterization study is performed to model the 1D seismic‐velocity profile and, for some sites, the liquefaction potential. Geophysical (passive and active surface‐wave methods) and geotechnical cone penetration test (CPT) with additional pore‐pressure measurement (CPTu) and seismic CPT (SCPT) methods are used. Analyzing the passive and active recordings with a variety of established and advanced methods, the fundamental frequency of the site, the polarization of the wavefield, the Love‐ and Rayleigh‐wave phase‐velocity dispersion curves, and the Rayleigh‐wave ellipticity function are retrieved. The liquefaction potential is assessed using CPTu. SCPT measurements are sometimes used to determine the shallow underground structure. The benefits of the combination of different appropriate methods are shown for two examples—the borehole station SBUS in Buochs and the upcoming borehole station SCME in Collombey‐Muraz. At both the sites, the CPTu measurements show an elevated liquefaction potential. Combining the passive and active data, the dispersion curves for Love and Rayleigh waves and Rayleigh‐wave ellipticity curves are retrieved over a wide‐frequency range and inverted for the S‐wave velocity profile, in which the shallow part is constrained by the active or SCPT data, the intermediate part by the dispersion curves of the passive methods, and the deepest part by the ellipticity information. For Buochs, the 1D SH‐wave amplification functions modeled for the velocity profiles are compared with the empirical amplification for earthquake recordings. Finally, an overview of the site characterization results for 52 of the newly installed seismic stations is given.

中文翻译：

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瑞士强运动站的场地表征：先进处理算法的好处

自 2009 年以来，为更新瑞士强震网络，新建了 91 个强震站。到 2022 年，还将安装另外 9 个站点。对于每个新站点，都将进行广泛的站点特征研究，以对一维地震速度剖面进行建模，对于某些站点，还会对液化潜力进行建模。使用地球物理（被动和主动表面波方法）和岩土锥形穿透试验（CPT）以及附加孔隙压力测量（CPTu）和地震 CPT（SCPT）方法。使用各种既定和先进的方法分析被动和主动记录，检索站点的基频、波场的极化、洛夫和瑞利波相速度色散曲线以及瑞利波椭圆度函数. 使用 CPTu 评估液化潜力。SCPT 测量有时用于确定浅层地下结构。两个例子展示了不同适当方法组合的好处——Buochs​​ 的钻孔站 SBUS 和即将到来的 Collombey-Muraz 钻孔站 SCME。在这两个地点，CPTu 测量结果显示液化潜力升高。结合被动和主动数据，Love 和 Rayleigh 波的频散曲线和 Rayleigh 波椭圆度曲线在很宽的频率范围内被检索，并为 S 波速度剖面进行反演，其中浅部受主动或SCPT数据，中间部分为被动方法的色散曲线，最深部分为椭圆度信息。对于布克斯来说，为速度剖面建模的一维 SH 波放大函数与地震记录的经验放大进行了比较。最后，概述了 52 个新安装的地震台站的场地特征结果。