Abstract:Sand consolidated anchorage prestressed bolt is composed of bolt,sand cylinder,steel circular plate,wooden sealed,trap,etc.. In order to apply sand consolidated anchorage prestressed bolt to anchorage engineering,experimental study is conducted in the Three Gorges Project on Yangtze River and underground caverns in Fengtan Hydropower Station. 12 bolts with high-strength materials and diameter of 32 mm are arranged in a granite slope in the Three Gorges Project. The experiments show that the tension of the bolt is over 300 kN;and the ultimate strength is about 540 kN. Design methods and construction techniques for sand consolidated anchorage prestressed bolt are provided according to the experimental study;and the prestress monitoring is carried out to test the bolt¢s long-term stability. Ten bolts with common materials are arranged in quartz sandstone slope in underground caverns in Fengtan Hydropower Station. The holes are drilled by different types of construction machinery. According to the experimental study in Fengtan Hydropower Station,new technologies such as a new type sand consolidated anchorage prestressed bolt with rigid seal to block sand are innovated,which has been authorized invention patents by Chinese Patent Office.