| 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。 |
| 关键词: 疏浚土 充填袋 现场试验 分布式光纤 地质雷达 |
| DOI： |
| 分类号:TU447 |
| 基金项目: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） |
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| Field tests on embankments constructed by large filling bags |
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ZHU Qun-feng, HE Ning, GAO Chang-sheng, YANG Shou-hua, WANG Nian-xiang, ZHOU Rong-guan
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State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing
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| Abstract: |
| In order to reduce the destruction of natural environment induced by the utilization of large quantity of mountain stones in development and construction of ports, the feasibility of constructing embankments by using the dredged soil from waterways is discussed in this study. The field tests on the filling bags with dredged soil are performed by installing prototype observation instruments. The test results show that the excess pore water pressure in the filling bags is small, the dissipating speed is fast, and taking the dredged soil as filling materials can fully satisfy the requirements of constructing embankments. During the construction of embankments with the filling bags, the largest measured ground settlement is 249 mm, and the rate of the horizontal displacement is stably controlled within the standard range, indicating that the ground is safe. The main compression process of the filling bags is completed within 3 to 6 days, and the mean compressibility ratio is about 15.7%. The measured forces acting on the filling bags using the distributed fiber measurements are smaller than the design values, and no damage caused by insufficient strength of materials for the filling bags is found. The results of geological radar detection show that the detected thickness of the filling bags agrees with the measured one. The filling situation of the bags is satisfactory, and the dividing line of the neighboring bags is clear too. The measuring precision meets the requirements of engineering detection so as to provide powerful technical supports for a rapid detection of quality of embankments constructed with the filling bags. After completion of the trial embankment, the embankment structure is stable and reliable. For more than two years’normal operation, the quality of the embankment is fairly good. The practical works indicate that it is successful to construct the embankment by using the filling bags of dredged soil. The effective use of the dredged soil from the waterways is in accordance with the development requirements of the cyclic economy and worthy to be further popularized. |
| Key words: dredged soil filling bag field test distributed optic fiber geological radar |
