来源：Landslides
作者：Zhang L.; Cui Y.; Zhu H.; Wu H.; Han H.; Yan Y.; Shi B.
出版时间：2023-01-01
DOI：10.1007/s10346-023-02051-5
研究背景
山体滑坡是一种常见的自然灾害，其发生对人类造成了严重的威胁。为了及时预警和减轻灾害损失，研究人员一直在探索更有效的山体滑坡监测方法。传统的监测方法存在着诸多限制，因此需要新技术的支持。
研究内容
本研究采用分布式应变传感技术（DSS）来监测山体滑坡的剪切变形，解决了两个重要的问题。一是解决了DSS电缆与周围土壤之间的耦合行为问题，二是提出了一种新的应变-位移转换模型。研究人员通过实验室剪切试验和现场监测数据验证了该方法的可靠性和准确性。
研究意义
本研究提出的新技术解决了传统监测方法存在的问题，可以更准确地监测山体滑坡的剪切变形，为山体滑坡的预警和防治提供了有力的支持。此外，本研究提出的耦合准则和新的应变-位移转换模型对于其他领域的地质灾害监测也有着重要的参考价值。
Shear deformation calculation of landslide using distributed strain sensing technology considering the coupling effect
Abstract: Deformation monitoring is of great significance in understanding the evolution process of landslides and evaluating their stability conditions. Distributed strain sensing (DSS) technology, with obvious advantages of long measuring distance and excellent long-term performance, has become a widely accepted method in landslide monitoring. Nonetheless, when monitoring the subsurface shear deformation of a landslide based on DSS technology, two significant challenges remain unresolved. First, the coupling behavior between the borehole-installed DSS cable and the surrounding soil is unclear. Second, how to convert the strains exerted on the DSS cable into shear displacements remains elusive. To address these issues, this study investigates the coupling deformation mechanism between the DSS cable and surrounding soil under both low and high confining pressures, and develops corresponding soil-cable coupling criteria. Subsequently, a novel strain–displacement conversion model, namely the accumulative integral method (AIM), is proposed based on the geometric configuration of the DSS cable during soil shearing. The proposed method is verified against laboratory shear test results and field monitoring data, yielding results that not only confirm the reliability of the soil-cable coupling criteria, but also demonstrate the superiority of the proposed AIM over other methods in terms of accuracy.
Keywords: Distributed strain sensing (DSS) · Soil-cable coupling behavior · Strain measurement · Shear deformation · Interfacial
behavior