When combined method is applied , damaged area develops from down stream to up - stream , besides , controlling effect of discontinuous joints is shown . at normal storage water level , the combined safety factors are 4 . 05 and 3 . 75 for 9b and 4b respectively 結(jié)果表明,超載法時,破壞區(qū)從上游向下游發(fā)展,且破壞前鋒一直沿建基面附近;綜合法時,破壞區(qū)從下游向上游發(fā)展,并表現(xiàn)出裂隙結(jié)構(gòu)面參數(shù)的控制作用。
Based on the project scale argumentation of letan hydropower station , the paper briefly introduces the main results of scheme ' s technical & economical comparison and the main factors of scheme option in the option and design stage of the normal storage water level and installed capacity , as well as the evaluating opinions given by the specialist group of project proposal evaluating committee ; the main technical characteristics for similar project scale argumentation are summarized up according to the project scale design argumentation of letan hydropower station 摘要通過樂灘水電站工程規(guī)模論證,簡述該工程正常蓄水位選擇和裝機容量選擇設計階段方案技術(shù)經(jīng)濟比較的主要成果、取舍方案的主要因素、以及項目建議書評估會專家組的評估意見;并根據(jù)樂灘水電站工程規(guī)模設計論證總結(jié)類似工程規(guī)模論證時的主要技術(shù)要點。