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Abstract 186 samples of in situ rock masses strength parameters testing values，which include 7 samples of class I，41 samples of class II，46 samples of class III，76 samples of class IV，16 samples of class V，are screened out based on in-situ testing datum of CRSRI and information collected in Rock Masses Strength Parameters. By statistical analyzing，the scope of strength parameters of each class is given out，and the scopes are compared with the suggesting values in Standard for engineering classification of rock masses. Result indicates that the suggesting values in Standard for Engineering Classification of Rock Masses is much lower and needs to be corrected. 110 samples of geological suggestion values，which include 12 of class I，22 of class II，28 of class III，30 of class IV，18 of class V，are also screened out based on engineering geological datum of above 40 typical projects. The scope of geological suggestion values of each class is then given out，and compared with the values in Code for Engineering Geological Investigation of water resources and hydropower. Result indicates that the two scopes consist with each other well. Researching achievements can not only be helpful in standards or codes modification，but also be meaningful in enhancing the understanding of rock masses strength for engineers.
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Received: 06 October 2010
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2011, Vol. 30 
