Qiaogong lockwall as a whole of the gravity-type structure is optimization designed to lower-lining,upper-gravity of the hybrid structure,using structure-anchor tie and drainage system to achieve stability of the lockwall,as a result of saving the project investment,speeding up the construction progress.

Mechanical analysis of systematic bolts on rock mass in high side slope at intake of Xiangjiaba Hydropower Station;

Based on the numerical model analysis,the improvement of elastic modulus and Poisson s ratio is discussed;and the different influence-degrees of systematic bolts on different rock masses are analysed .

in this Paper, through the similar model tests in the laboratory, the improvement of compressive strength, elastic modulus, C and values is discussed, and the anisotropy is preliminarily studied for therock mass reinforced with systematic bolts in the high slope of Three Gorges flight lock.

Most of tunnel system bolt design are analogical between each other without any consideration of the effect of surrounding rock.

It has been a focus of debate for a long time how the system bolts act in the loess tunnel.