人民黄河
人民黃河
인민황하
Yellow River
2015年
9期
49-53
,共5页
岸滩冲刷%笛卡尔架构块%防护效果%防护参数%流速削减率
岸灘遲刷%笛卡爾架構塊%防護效果%防護參數%流速削減率
안탄충쇄%적잡이가구괴%방호효과%방호삼수%류속삭감솔
riverbank scour%concrete blocks like Cartesian space%protection effect%protection parameters%reduction rate of flow velocity
笛卡尔架构块对河流岸滩冲刷具有较为显著的防护效果，但初步的工程应用表明防护参数对其防护效果的影响较大，为了优化笛卡尔架构块防冲护岸工程设计，通过室内水槽试验深入研究了布设密度、杆件长宽比、布设长度、布设宽度、布设间距等防护参数与笛卡尔架构块防护体系内部及上下游不同位置处的纵向近底流速削减率之间的关系，并依据近底流速削减率随防护参数的变化规律深入分析了防护参数对笛卡尔架构块减速防冲效果的影响。结果表明，布设密度大于0．2、杆件长宽比的取值范围为[9，13]、布设长度大于30 m、布设间距不超过1．6倍布设长度时的防护效果最好。
笛卡爾架構塊對河流岸灘遲刷具有較為顯著的防護效果，但初步的工程應用錶明防護參數對其防護效果的影響較大，為瞭優化笛卡爾架構塊防遲護岸工程設計，通過室內水槽試驗深入研究瞭佈設密度、桿件長寬比、佈設長度、佈設寬度、佈設間距等防護參數與笛卡爾架構塊防護體繫內部及上下遊不同位置處的縱嚮近底流速削減率之間的關繫，併依據近底流速削減率隨防護參數的變化規律深入分析瞭防護參數對笛卡爾架構塊減速防遲效果的影響。結果錶明，佈設密度大于0．2、桿件長寬比的取值範圍為[9，13]、佈設長度大于30 m、佈設間距不超過1．6倍佈設長度時的防護效果最好。
적잡이가구괴대하류안탄충쇄구유교위현저적방호효과，단초보적공정응용표명방호삼수대기방호효과적영향교대，위료우화적잡이가구괴방충호안공정설계，통과실내수조시험심입연구료포설밀도、간건장관비、포설장도、포설관도、포설간거등방호삼수여적잡이가구괴방호체계내부급상하유불동위치처적종향근저류속삭감솔지간적관계，병의거근저류속삭감솔수방호삼수적변화규률심입분석료방호삼수대적잡이가구괴감속방충효과적영향。결과표명，포설밀도대우0．2、간건장관비적취치범위위[9，13]、포설장도대우30 m、포설간거불초과1．6배포설장도시적방호효과최호。
The concrete blocks like Cartesian space(CBLCS)have an obvious protection function for the local scour near the riverbank. However,the tentative engineering application of the CBLCS shows that the protection factors have a very great influence on the protection effect. In order to optimize engineering design of the CBLCS for the local scour near the riverbank,the paper further studied the relationship between the protection parameters and the reduction rate of flow velocity which was located in the longitudinal axis of symmetry of protection engineering near the riverbed,and deeply analyzed the influence of the layout density,length-width ratio,layout length,layout width and layout interval for protection effect of the concrete blocks like Cartesian space. The research results show that the protection effect of the CBLCS is the best when the layout density is greater than 0. 2,the length-width ratio is selected from [9,13],the layout length is greater than 30m and layout interval is not greater than 1. 6 times of the layout length.
