In this paper we present the results of a seismic experiment using data produced by an active Vibroseis source and varying the drive force level, during a standard seismic reflection survey. We observed a clear non-linear response that can be linked to the presence of shallow soft sediment layers. The variation of the applied vibration force induces a change in both propagation velocity and attenuation of the Rayleigh waves, and this implies that such parameters are non-linear functions of the wave energy. We analyze the soil non-linear behavior with respect to the estimated induced strain, in order to compare the collected data against the observed reduction of shear modulus and damping values as usually measured in laboratory experiments and reported in the literature. The use of multi-component receivers allowed us also to identify the Rayleigh wave ellipticity and hence the resonance frequency of the studied site. Using active source data, rather than passive micro-tremors of unknown origin, for these applications is a novel approach. Thus, we propose an alternative and efficient method to characterize the non-linear key parameters of the soil seismic response, based on the use of controlled sources of widespread use in exploration seismics. This approach may pave the way to the development of utterly new site characterization techniques.

在本文中，我们展示了在标准地震反射勘测期间，使用由活跃的可控震源产生的数据并改变驱动力水平的地震实验结果。我们观察到明显的非线性响应，这可能与浅软沉积层的存在有关。施加的振动力的变化引起瑞利波的传播速度和衰减的变化，这意味着这些参数是波能量的非线性函数。我们根据估计的诱导应变分析土壤非线性行为，以便将收集的数据与观察到的剪切模量和阻尼值的降低进行比较，这些值通常在实验室实验中测量并在文献中报告。多分量接收器的使用还使我们能够识别瑞利波椭圆度，从而确定研究地点的共振频率。对于这些应用程序，使用主动源数据而不是未知来源的被动微震是一种新颖的方法。因此，我们基于在勘探地震中广泛使用的受控源的使用，提出了一种替代且有效的方法来表征土壤地震响应的非线性关键参数。这种方法可能为开发全新的场地表征技术铺平道路。基于在勘探地震中广泛使用的受控源的使用，我们提出了一种替代且有效的方法来表征土壤地震响应的非线性关键参数。这种方法可能为开发全新的场地表征技术铺平道路。基于在勘探地震中广泛使用的受控源的使用，我们提出了一种替代且有效的方法来表征土壤地震响应的非线性关键参数。这种方法可能为开发全新的场地表征技术铺平道路。