Engineering Classification of Jointed Rock Mass Based on Connectional Expectation: A Case Study for Songta Dam Site, China

Engineering classification of complex jointed rock mass is influenced and controlled by many factors with random, nonlinear, and unascertained characteristics, which is an extremely complicated problem. This paper introduces a comprehensive method to classify the rock mass with complex joints. Firstly, evaluation indexes are described by the interval number theory. Secondly, the weight values of the evaluation indexes are determined by the analytic hierarchy process (AHP). Thirdly, the connectional expectation between interval numbers is analyzed and the classification grade of jointed rock mass quality is identified by the set pair analysis theory. The new method can not only describe the dynamic evolution trend of various influencing factors, but also simplify the analysis process of the relationship between interval numbers. The Songta dam abutment rock mass is selected as a study case to verify the rationality of the new method. The classification results of rock mass quality obtained by the new method are in accordance with the actual situation and are consistent with the results provided by the RMR classification.

ANALISIS KEBUTUHAN INFORMASI STANDAR DI KAWASAN PUSPIPTEK SERPONG: BERDASARKAN JENIS DAN KLASIFIKASINYA

This study aims to find out the standard information needs in the Puspiptek Region. While the specific objective of this study is to know the types of standard and standard classification required. The study was carried out descriptively. The data were collected by inventorying standard information needs during the 2011-2017 period. The results of this study concluded: 1) the type of standard information needed in Puspiptek Serpong Area are ASTM, JIS, ISO, BS, SNI, DIN, IEC, UIC; 2) based on the classification, the standards needed in the Puspiptek Serpong area are: a) ASTM, miscellaneous material classification; miscellaneous subjects; cementious, ceramic, concrete, and masonry material; b) JIS, railway engineering classification; chemical engineering; mechanical engineering; c) ISO, rubber and plastic industries classification; metallurgy; road vehicles engineering; d) British standard, agriculture classification; construction materials and building; chemical technology; e) SNI, metallurgy classification; food technology; construction materials and building; f) DIN standard, rubber and plastic industries classification; paint and colour industries; g) IEC standard, electrical engineering classification; testing/ environmental testing. The results of this study can be the recommendations for decision makers in the context of procurement/provision of documents, especially standard documents in the Puspiptek Serpong, for the development of science and technology.