Research on Comprehensive Survey and Design of Landslide on a Highway Under Construction in Western Henan
[Purposes]Due to the complex terrain and geology,high embankments and deep excavations,the construction of the expressway in the mountainous area of western Henan Province has caused signifi-cant disturbance to the original topography,and is prone to engineering landslides.It is difficult to accu-rately identify landslide characteristics,which hinders the determination of landslide control solutions.[Methods]This article focuses on the investigation of a large deep-seated soil landslide on an express-way under construction in western Henan Province,using multiple exploration methods such as low-altitude aerial photogrammetry,three-dimensional real scene modeling,surface investigation and moni-toring,underground drilling,geophysical exploration,inclinometer monitoring,and testing.The scope of the landslide,shear zone,thickness of the cover layer,material composition,rear crack,and sliding sur-face(band)characteristics were accurately determined.The sliding surface check and stability monitor-ing are carried out by surface and deep displacement monitoring methods.[Findings]The shear strength parameters of the sliding surface(band)were comprehensively determined and the residual sliding force of the landslide was quantitatively calculated.[Conclusions]The results can provide reference for the design of landslide control scheme.
Western Henan mountainous expresswaylandslide investigationthree-dimensional real modelingdeep displacement monitoringsliding surface(band)characteristics
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