ABSTRACT
The Kezier reservoir on the Weigan river in Xinjiang is a large scale reservoir. The reservoir site outcrops are weak sandstone and mudstone of Neo-tertiary system. All of the terraces and gravel layers of the river bed have been dislocated by the fault F2, forming a Square Mountain between the main dam and the auxiliary dam, on which relatively large ground fissure can be found everywhere. By crossing fault observation since 1972, the current active level of the fault is obtained. The auxiliary dam right abutment is located on the scarp of the fault F2. Fault activity and ground fissure are key engineering geology problems of the auxiliary dam right abutment. On the basis of discussion and assessment of the said problem, the design features of the auxiliary dam right abument are given.
