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In this paper Goda's new method for the calculation of wave pressures on vertical walls adopted in the recently revised Japanese Design Criteria is reviewed and compared with ours. which has been adopted in the technical specification of harbor engineering by the Ministry of communi- cations P. R.C. It is shown that the values of wave forces and the effect of wave period and the height of rubble mound foundation on wave pressures calculated by the new Japanese method are in close agreement... In this paper Goda's new method for the calculation of wave pressures on vertical walls adopted in the recently revised Japanese Design Criteria is reviewed and compared with ours. which has been adopted in the technical specification of harbor engineering by the Ministry of communi- cations P. R.C. It is shown that the values of wave forces and the effect of wave period and the height of rubble mound foundation on wave pressures calculated by the new Japanese method are in close agreement with those as gives by our method. 本文对刚由日本设计基准修正后采用的合田直墙波压力计算新方法进行了分析,并与我院成果(已为交通部港口工程技术规范所采用)相比较。结果表明.无论对计算所得的波压力值,或是对波周期及抛石基床高度对波压力的影响.日本新方法与我方法的结果是相近的。 In order to obtain the high gel strength agar from Gracilaria, a series of experiments have been done by the Research Group. Gracilaria verrucosa and Gracilaria tenuistipitata were found good materials for this purpose. The seaweed is pretreated with a 40% sodium hydroxide solution at 60℃ for 16-20 hours, followed by washing with water and bleaching with 0.6% sodium chlorite or 0.2% sodittm hypochlorite at pH 1.5-2.5, then reducing with 2 % sodium thiosulfate (the dry weight of seaweeds taken as 100 percent).... In order to obtain the high gel strength agar from Gracilaria, a series of experiments have been done by the Research Group. Gracilaria verrucosa and Gracilaria tenuistipitata were found good materials for this purpose. The seaweed is pretreated with a 40% sodium hydroxide solution at 60℃ for 16-20 hours, followed by washing with water and bleaching with 0.6% sodium chlorite or 0.2% sodittm hypochlorite at pH 1.5-2.5, then reducing with 2 % sodium thiosulfate (the dry weight of seaweeds taken as 100 percent). Before cooking with boiling water, the seaweeds must be washed thoroughly. The gel strength was aroun'd 1000-1700g/cm~2 as determined by the Japanese method. 本研究是探索由江蓠制琼胶的较好工艺条件:包括不同碱浓度、温度与处理时间对琼胶的凝胶强度的影响;采用亚氯酸钠、次氯酸钠为漂白剂,对江蓠和细基江蓠进行生产工艺的优选试验,得出“中温浓碱”法为较好的工艺条件,并设计了工业性生产工艺流程。经合浦水产公司冷冻厂和本院附属工厂实践检验,结果表明,采用这个新工艺具有生产周期短,工艺操作容易掌握,生产设备简单,建厂投资少,成本低等优点;更重要的是凝胶强度由普遍600克/cm~2以下提高到1000~1700克/cm~2,超过出口商品的标准,为国产琼胶进入国际市场开辟了新的途径。 So far, there are mainly two advanced methods for deducing concrete strength,i. e. the accelerated-autoclave method of china and the accelerated-steam curingmethod of Japan. The results of experimental comparison between two methodsshow that, Chinese method is better as it requires simple equipment, it is lessexpensive and easy to operate with high accuracy in deducing data and good rep-roducing ability, thus is suiteble for extensive application, more over, both thecorrelation coefficient... So far, there are mainly two advanced methods for deducing concrete strength,i. e. the accelerated-autoclave method of china and the accelerated-steam curingmethod of Japan. The results of experimental comparison between two methodsshow that, Chinese method is better as it requires simple equipment, it is lessexpensive and easy to operate with high accuracy in deducing data and good rep-roducing ability, thus is suiteble for extensive application, more over, both thecorrelation coefficient of the strength relation and the accuracy of deducing ofChinese method are better than in Japanese method. 当前快速推定混凝土强度有两种比较先进的试验方法,即我国促凝压蒸法和日本促凝蒸养法。两种方法比较结果表明,我国促凝压蒸法不仅设备投资少,操作简单,易于推广,而且试验误差小,复演性好。其强度关系式的相关系数和推定精度优于日本方法。
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