Abstract
The failure of locked segment-type slopes is often affected by rainfall, earthquake, and other external loads. Rainfall scours the slope and weakens the mechanical properties of rock-soil mass. At the same time, rainfall infiltrates into cracks of slope rock mass. Under the action of in situ stress, hydraulic fracturing leads to the development and expansion of rock cracks, which increases the risk of slope instability. Under seismic force, the slope will be subjected to large horizontal inertial force, resulting in slope instability. In this paper, a self-developed loading device was used to simulate the external loads such as rainfall and earthquake, and the model tests are carried out to study the evolution mechanism of landslide with retaining wall locked segment. Three-dimensional laser scanner, microearth pressure sensors, and high-definition camera are applied for the high-precision monitoring of slope shape, deformation, and stress. Test results show that the retaining wall locked segment has an important control effect on landslide stability. The characteristics of deformation evolution and stress response of landslide with retaining wall locked segment are analyzed and studied by changing the slope shape, earth pressure, and the displacement cloud map. The evolutionary process of landslide with retaining wall locked segment is summarized. Experimental results reveal that as the landslide with retaining wall locked segment is at failure, the upper part of the landslide thrusts and slides and the retaining wall produces a locking effect; the middle part extrudes and uplifts, which is accompanied with shallow sliding; and compression-shear fracture of the locked segment leads to the landslide failure.
Highlights
Landslides can be divided into two types depending on whether there are locked segments that control landslide stability: locked segment type and nonlocked segment type [1]
The locked segments can be “harder” boulders or rocks formed by long-term differential weathering of the slope, or “harder” intrusive rocks formed by tectonic movement or hard rocks formed by geological transport and deposition
Failure of the locked segment leads to the overall failure of the landslide
Summary
Landslides can be divided into two types depending on whether there are locked segments that control landslide stability: locked segment type and nonlocked segment type [1]. From the perspective of the history of geological evolution, the locked segments are the “hard” rock-soil mass formed by the long-term geological evolution at the potential sliding surface. Compared to the surrounding rock and soil, the locked segments have better mechanical properties and control landslide sliding. Locked segment-type landslides are usually large and have high energy storage. Once they lose stability and slide, they often lead to high-speed and long-distance landslides with strong destructiveness. It is of great importance to study the evolution mechanism of locked segment type landslide for early landslide identification, early warning, and disaster prevention [2,3,4,5,6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
