【摘要】 为了验证水坠法筑坝坝体的安全性及稳定性,以陕西省志丹县前拐沟淤地坝为研究对象,运用静力触探技术,结合Surfer11.0软件,研究了水坠坝流态区位置、大小随时间的变化。结果表明,(1)坝坡上部比贯入阻力值整体小于下部,且上游坝坡上部较下部稳定;下游坝坡下部较上部稳定。(2)经过3个月的自然沉降,下游坝体4 m深度以下土体随时间逐渐趋于稳定。上游坝体2.5 m深度以下土体随时间逐渐趋于稳定,且此现象较下游明显。坝顶坝体随时间比贯入阻力值无明显变化。(3)随时间流态区、软塑区及可塑区的面积均有所减小,且该区域没有发生明显的偏移,而随着时间硬塑区的面积明显变小,坚硬区的面积明显增加,坚硬区由坝体外侧逐步向坝体中央延伸,坝体整体由硬塑区占主体向坚硬区占主体转变,坝体整体的稳定性得以提高。更多还原

【Abstract】 In addition to verify the safety and stability of dam which built with sluicing-siltation method,the Qianguaigou warping dam in Zhidan county of Shaanxi province was chosen as the study subject,the static sounding technology was used with Surfer11.0 software to study the changing of flow condition location and size of water falling dam over time.The results showed that:(1) the penetration resistance value of the upper slope was less than the lower;the upper part was more stable than the lower for the upstream dam slope and just the opposite to the downstream dam slope.(2) After 3 months of natural sedimentation,the soil under 4 m for downstream dam and under 2.5 m for upstream dam tended to be more stable over time.In addition,the phenomenon in upstream was more evident than downstream.The penetration resistance value of dam crest had not significant changing with time.(3)The area of flow condition pattern and soft plastic zone was reduced over time,and this region did not change offset significantly.With time the area of hard plastic zone became significantly smaller,hard zone area increased significantly.Hard area gradually extended from the outside to the central of dam,the dominant of dam entirely changed from hard plastic zone to hard area and the overall stability of dam was improved.更多还原