公路排水跌坎急流槽新型消力池出流冲刷试验  

New type of eliminating energy pool out-flow scouring experiments of rapid chamfer falling guttery for highway

作　　者：沈波[1,2] 艾翠玲[3] 吕宏兴[2] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [3]福州大学土木工程学院,福建福州350002

出　　处：《长安大学学报（自然科学版）》2009年第2期42-45,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131881234)

摘　　要：为增加公路排水跌坎急流槽安全稳定性,对公路排水跌坎急流槽常规跌水消力池及3种新型跌坎消力池出流冲刷模型进行试验。结果表明:跌坎高度、水流相同时,跌坎急流槽消力池后冲坑最大冲深从小到大依次为跌水台入流消力池、副消力池出流消力池、台阶出流消力池和常规跌水消力池;跌坎急流槽消力池跌水台入流消力池构造深度越深,出流后冲坑最大冲深越小,而常规消力池构造深度越深,出流后冲坑最大冲深越大;从工程安全与经济考虑,跌水台入流、台阶出流消力池结构形式可大大减少消力池工程开挖量,消能设施稳定性明显增加;3种新型消力池可大大缩短出流后加固铺砌长度,综合使用后减冲防灾效果更为显著。In order to increase the safety of rapid chamfer falling guttery for highway, this paper has done 3 new types of eliminating energy pool out-flow scouring experiments of rapid chamfer falling guttery for highway （ the convention pool, falling water platform pool, sidestep out-flowing pool, and convention pool joining subsidiary pool）. The results show that under the same flow conditions and rapid chamfer height, the falling platform pool outflow scouring maximal depth is the smallest among the four eliminating energy pool types, the convention pool joining subsidiary pool belongs to the second, decreasing of sidestep out-flowing pool scouring maximal depth is comparatively smaller than the convention eliminating pool, the convention pool scouring pit depth is the greatest one; the souring maximal depth decreases with increase of the falling platform pool depth, but the ordinary rush falling rapid chamfer convention pool depth increases with increase of the souring maximal depth. By considering of safety and economy of engineering, falling water platform pool and sidestep out-flowing pool can decrease the great deal of excavate soil, and increase the eliminating pool stability. The falling water platform pool, sidestep out- flowing pool, and convention pool joining subsidiary pool can decrease the preventive scouringpavement length of eliminating energy pool. Using three new types convention pool construct together, the effect of damages preventing will be improved obviously. 3 tabs, 4 figs, 6 refs.

关 键 词：道路工程 路基排水 急流槽 新型消力池 最大冲深 

分 类 号：U417.3[交通运输工程—道路与铁道工程] TU457[建筑科学—岩土工程]