Application of Xinao Method to Handle Fault of the Left Shoulder of Tiantangshan Arch Dam

This paper introduces the new underground building construction method to control excavating quality and use support method of anchor poles combined with timber structure under excavating construction to handle the fault in the left shoulder of Tiantangshan arch dam because the condition of geology is not good,therefore that speeded construction rate,shortened construction period,ensured the construction quality and safety,and the same time obvious economic benefit had been gained.