STABILITY ANALYSIS OF GRAVITY PIPELINE PROTECTION RETAINING WALL SUBJECTED TO LOADS OF FLOOD IN RIVER BEND
BI Weiwei1，LI Yunpeng1，HAN Bing2
(1. College of Mechanical and Transportation Engineering，China University of Petroleum，Beijing 102249，China；
2. Petroleum Technology Research Center，Petroleum China Pipeline Co.，Ltd.，Langfang，Hebei 065000，China)
Abstract：Gravity pipeline protection wall，as a main type of hydraulic protection projects，is likely to be destroyed by the rushing flood. In view of the present instability problems of gravity retaining wall subjected to loads of flood in river bend and according to the structure characteristics and the actual stress state of the pipeline protection retaining wall，the paper puts forward new formulas about safety factor of wall?s stability and the lateral scour limit depth under wall，in which the factors，such as the rush of flood，the buoyancy force，the seepage water pressure，the lateral widening depth under wall and the descent velocity of flood level，are considered. Based on the formulas，the effect of each factor on the stability of the retaining wall is analyzed. The results indicate that in the period of flood level rising，owing to the loads of flood in river bend，the wall shows a decreasing horizontal slide failure trend to the river. On the contrary，the buoyancy force，the seepage water pressure，lateral widening depth and the descent velocity of flood level make the retaining wall easy to overturn and there is a non-proportional relationship between the ability to resist overturning and the water level difference before and after the retaining wall. The formulas and analytical ideas and methods cannot only be adopted to the stability analysis of gravity retaining wall along the river，but also provide a theoretical reference for the similar engineering design and research.
黄金池，孟国忠. 管道穿河工程水毁灾害分析[J]. 泥沙研究，1998，43(2)：42-49.(HUANG Jinchi，MENG Guozhong. Analysis on flood damage of crossing river pipeline project[J]. Journal of Sediment Research，1998，43(2)：42-49.(in Chinese))
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2014, Vol. 33 
