Model test study of a landslide stabilized with piles and evolutionary stage identification based on thermal infrared te
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Dongzi Liu I Xinli Hu I Chang Zhou I Lanxing Li I Chuncan He I Tao Sun
Model test study of a landslide stabilized with piles and evolutionary stage identification based on thermal infrared temperature analysis
Abstract A model test of a landslide stabilized with piles can reproduce the process of landslide occurrence and behavior of the stabilizing piles. With a development of real-time multiple filed data acquiring systems, deformation and failure mechanism of landslide event may be demonstrated. This paper described an application of infrared thermography. In order to perform interpretation of such analysis precisely, an index to analyze thermal infrared temperature was proposed. Qualitative relationship between stress state and deformation and thermal infrared temperature was established from experiments. According to this relationship, the failure process in the model was divided into three stages of development, with distinctive spatial-temporal characteristics of infrared radiation abnormalities. The test results revealed that the sources of the stabilizing force in each stage were quite different and thus evolutionary stage identification based on the thermal infrared temperature analysis was possible. This new method can be used for study of the deformation and failure mechanism of a landslide stabilized with piles. Keywords Landslide stabilized with piles . Model test . Field information . Thermal infrared temperature . Evolutionary stage identification
Introduction Landslides have been widely reported in the literature all over the world. In the Three Gorges Reservoir area in China, besides anchor cable and retaining wall, the stabilizing piles (called piles in this paper) have been widely used to stabilize the ground. More than 725 landslides have been stabilized with piles (Wu et al. 2001; Wang et al. 2004; Huang et al. 2012; Xu et al. 2015). However, the development of landslide stabilized with piles is an extremely complicated process, controlled by internal and external factors and accompanied by the changes of the stress, displacement, and perhaps consequent temperature (Hu et al. 2017; Zhang et al. 2018a, b); the stage of slope failure development will vary with environment factors and time (Tang et al. 2015; Crosta et al. 2017; Gu et al. 2017). It is essential to identify the evolutionary stages for understanding the deformation and failure process of a landslide stabilized with piles. As a practical and effective method (Luo et al. 2010; Iverson 2015; Zhang et al. 2017), the model test of a landslide stabilized with piles can reproduce the process of landslide occurrence, characterize the filed information, and evaluate the stability in an inherently natural way (He et al. 2018). A number of 1g or ng model tests of landslide stabilized with piles have been performed (Wang and Zhang 2014; Zhu et al. 2015; Hussien et al. 2016). Li et al. (2016) believed that the percentage of hard bedrock embedment had a strong influence on the deformation and moment of the stabilizing
pile. But so far, since it
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