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风倒木又多伴泥石流而流出,多因建筑物拦截而雍高水位,造成洪泛水灾。在日本控制浮木灾害的规范规定拦截工程间隔B与最大浮木长度的比Lmax<1/2。2010年日本学者谷一等人通过模拟试验研究浮木长度及拦截工程间隔的变化,对拦截浮木性能的影响。其结论是:在B/Lmax同等条件下,浮木长度变短拦截率降低。不同浮木长度混在一起,拦截率降低。浮木拦截率取决于浮木长度、直径,拦截工程间隔、高度,流量等。有关拦截率推测公式,虽然与试验结果具有一致性,但其适用性研究不充分,有待于在今后工作,进一步深入研究。
The wind fell down with wood and debris flow and more outflow, mostly due to building interception Yong high water level, causing flooding floods. In Japan, the regulation of driftwood disaster requires that the ratio Lmax <1/2 of the interception interval B to the maximum length of the driftwood should be less than 1 / 2. In 2010, Japanese scholar Gu Yi et al studied the length of the driftwood and the change of the interval of the interception project by means of a simulation test, Driftwood performance impact. The conclusion is: Under the same condition of B / Lmax, the length of the driftwood will decrease and the interception rate will decrease. Different driftwood length mixed together, intercept rate is reduced. Driftwood interception rate depends on the length of the driftwood, diameter, interceptor engineering interval, height, flow and so on. Although the formula of interception rate estimation is consistent with the test results, its applicability is not sufficient and needs to be further studied in future work.