Soft Rock Engineering Properties of a Water Diversion Project in Central Southern Ningxia Hui Autonomous Region
LI Ming-fu
TENG Jie
Abstract：Lithology around the headrace tunnel in central southern Ningxia is mainly mudstone of Cretaceous and Tertia?ry,belongs to extremely soft rock or soft rock. In order to understand the engineering properties of soft rock and its adverse impact on the construction,some laboratory tests and in-situ testing methods were used. By analyzing the mudstone compo?sition,cement and environmental factors in the project area,the characteristics of mudstone and the main factor of effect?ing characteristics are initially identified,such as strength,rheology,disintegration,swell and sound wave of mudstone. At last,the corresponding engineering measures principles are put forward. The research results provide a basis for taking effective protective measures during engineering and construction to suppress or weaken the adversely impact of mudstone.
Keywords：mineral compositionrheological propertydisintegrationswell and shrinkwater diversion project
Publication Date：2015-01-01
Pages：5( 51-55 )