引黄平原水库蓄水初期围坝干砌石护坡破坏调查与原因分析

ANALYSIS OF THE SURROUNDING DAM DRY LAID STONE SLOPE REVETMENT DAMAGE OF A YELLOW RIVER DIVERSION RESERVOIR AT EARLY PERIOD OF WATER STORING

介绍了某引黄平原水库干砌石护坡在运用初期发生的破坏情况 ,给出了护坡块石合格率、砌筑质量、垫层结构的调查结果 .阐述了破坏的原因与机理 .研究表明 ,块石体形尺寸合格率低、砌筑质量差、垫层粒径偏小且不符合反滤结构要求是护坡破坏的内因 ,风浪作用是外因 .提出了围坝护坡破坏程度。

Introduces the surrounding dam dry laid stone slope revetment damage situation of a Yellow River diversion reservoir in plain region at its early period of using. Gives investigation result of slope revetment stones qualification ratio,building quality,cushion layer structure, and expounds the damage causes and mechanism. The study shows:low qualification ratio of stones in shape and size,poor building quality,too small cushion layer grains (it didn't accord with the demand of filter structure) are internal cause of the revetment damage, and the wind wave action is external cause. Concepts of surrounding dam slope revetment damage extent,sloughing hollow density are put forward.