Prestressed rock bolt supporting is a construction method which means to prevent the collapse of the surrounding soil, implanted inside the surrounding soil rock bolt with tension properties and effective anchorage length, and after stretching to make it increasing soil shear strength.
Prestressed rock bolt support has the features of convenient construction, construction speed and low construction costs.
The prestressed rock bolt support design principle:
Rock bolt support should be carried out according to rock soil survey report for design, first should measure according to anchorage soil of rock bolt to determine which soil is suitable anchorage.
Second, according to the soil mechanical theory formula to determine the anchorage length of rock bolt and anchor length, and determine anchor Angle, the number of layout and arrangement, etc., while according to pit of important grade measuring related data whether exceeded, such as being reinforced soil top horizontal displacement, etc.
Finally check the waist on the tension side beam tensile stress and to ensure that each item can meet the requirements.