振冲密实法处理吹填砂地基的现场试验研究  

Field Test Study on Vibroflotation Compaction Method for Treating Sand Fill Foundation

作　　者：吴民晖 刘海旺 Wu Minhui;Liu Haiwang(China Airport Planning&Design Institute Co.,Ltd.,Beijing 100011,China;Fujian Zhaoxiang Airport Construction Co.,Ltd.,Xiamen 361000,China;Observation and Research Base of Transport Industry of Airport Engineering Safety and Long-term Performance,Beijing 100011,China)

机构地区：[1]民航机场规划设计研究总院有限公司,北京100011 [2]福建兆翔机场建设有限公司,福建厦门361000 [3]机场工程安全与长期性能交通运输行业野外科学观测研究基地,北京100011

出　　处：《科学技术创新》2022年第13期137-140,共4页Scientific and Technological Innovation

摘　　要：围海造陆地基通常具有地下水位高、填料成分复杂多样且分布不均等特点,地基处理难度大。为了研究振冲在吹填海砂地基的加固效果,在某吹填海砂场地开展不同分区(不同桩体间距、方式和振冲器型号)的无填料振冲加固试验。试验后分别采用标准贯入试验、重型动力触探试验和波速试验进行现场检测。通过对比分析了设计深度范围检测数据发现:振冲处理后标准贯入试验击数、重型动力触探击数和波速均明显提高,有效加固深度明显超过经验值,结果表明振冲处理吹填海砂地基能有效提高其强度,证明了振冲法在吹填海砂地基的适用性。The foundation of sea reclamation usually has the characteristics of high groundwater level, complex and diverse filler and uneven distribution, so the foundation treatment is difficult. In order to study the reinforcement effect of vibroflotation on foundation of sea reclamation, experiments of vibroflotation without filler in different zones(different pile spacing, mode and vibroflotation device model) were carried out in a hydraulic reclamation sea sand site. After the test, standard penetration test, heavy dynamic penetration test and wave velocity test are used for on-site inspection. By comparing and analyzing the test data of the design depth range, it is found that the standard penetration test blow count, heavy dynamic penetration test blow count and wave velocity are significantly improved after vibroflotation treatment, and the effective reinforcement depth is significantly higher than the empirical value. The results show that vibroflotation can effectively improve the strength of Hydraulic Reclamation sea sand foundation, and prove the applicability of vibroflotation method in Hydraulic Reclamation sea sand foundation.

关 键 词：海砂 无填料振冲 标准贯入试验 重型动力触探试验 波速测试 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程]