大型充填袋筑堤现场试验研究

发布时间：2018-06-10 19:20

本文选题：疏浚土 + 充填袋　；参考：《水利水运工程学报》2016年04期

【摘要】：为减少港口开发建设中大量使用开山石对自然环境造成的破坏,探讨直接利用黏粒含量超过现行规范的航道疏浚土充填袋筑堤可行性,通过埋设原观仪器对疏浚土充填袋筑堤进行了现场试验研究。结果表明:充填泥袋内产生的超静孔压较小,消散速度快,采用疏浚土作为充灌材料完全满足充填袋筑堤进度要求;充填袋筑堤期间地基的实测最大沉降量为249 mm,水平位移速率始终处于地基稳定控制标准范围内,说明充填袋筑堤过程中地基是安全的;充填袋的主要压缩过程在3~6 d内完成,平均压缩率约为15.7%;分布式光纤实测充填袋袋体受力远小于设计值,未发现由于充填袋自身强度不足造成袋体破坏的情况;地质雷达探测充填袋厚度与现场实测沉降分析结果较吻合,袋体充盈情况良好,相邻两层袋体分界线清晰可见,其测量精度满足工程检测要求,为快速检测充填袋筑堤质量提供了强有力的技术支撑;试验段建成后,堤身结构稳定可靠,经过两年多的正常运行,堤身完好无损,实践证明利用疏浚土充填袋筑堤是成功的。
[Abstract]:In order to reduce the damage to the natural environment caused by the extensive use of open rock in port development and construction, the feasibility of building dike with filling bag filled with dredged soil with clay content exceeding the current standard is discussed. The field test of dredged soil filling bag embankment was carried out by embedding the original observation instrument. The results show that the excess pore pressure produced in the filling mud bag is small and the velocity of dissipation is fast. The dredged soil is used as the filling and filling material to meet the requirements of the filling bag embankment construction schedule. The measured maximum settlement of the foundation during the period of filling bag dike construction is 249 mm, and the horizontal displacement rate is always within the range of the foundation stability control standard, which indicates that the foundation is safe in the course of filling bag embankment construction, and the main compression process of the filling bag is completed in 3 ~ 6 days. The average compression ratio is about 15.7.The stress of the bag body measured by distributed optical fiber is much smaller than the design value, and the failure of the bag body caused by the insufficient strength of the bag is not found. The thickness of the filling bag detected by GPR is in good agreement with the measured settlement analysis result, the filling condition of the bag body is good, the boundary line of the adjacent two layers bag body is clearly visible, and the measuring accuracy meets the requirements of engineering inspection. After the completion of the test section, the structure of the embankment is stable and reliable, and after more than two years of normal operation, the dike is in good condition. The practice shows that it is successful to use dredged soil to fill the dike.
【作者单位】：南京水利科学研究院水文水资源与水利工程科学国家重点试验室;
【基金】：交通运输部科技成果推广项目(2015326T18050) 水利部公益性行业科研专项经费资助项目(201401006)
【分类号】：U655.5

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