江苏连云港地区吹填土室内沉积试验研究

Laboratory tests for the sedimentation of dredger fill in the Lianyungang area,Jiangsu,China

近年来,随着港口建设的飞速发展,将疏浚出来的淤泥用来填海造陆,已成为沿海城市缓解土地资源紧张的有效途径。由于吹填淤泥性质十分复杂,并且需要很长时间的自然沉积固结,待表面形成硬壳后方可加固处理。因此,对吹填土沉积规律和自重固结机理的研究显得尤为重要。本文以连云港地区吹填土为主要研究对象,通过室内沉积试验,对吹填土在静水条件下的沉积规律及固结特性做了系统分析和研究,并对沉积后的吹填土进行了微观结构定量分析,获得了孔隙直径、丰度、平面形态、定向频率、定向分维数等重要参数,该成果为吹填土地基加固提供了有力的参考依据,对于工程实践具有重要意义。

With the rapid development of China＇s harbor construction in recent years, using dredged mud in sea reclamation has become an effective way for alleviating the shortage of land resources in coastal cities, However, the properties of dredged mud are very complicated and its natural sedimentation and consolidation process takes a long time. Therefore the study of the characteristics of dredger fill sedimentation and mechanism of its self-weight consolidation is very important. Through laboratory sedimentation tests of dredger fill in Lianyungang, the sedimentary characteristics of dredger fill under the hydrostatic conditions and its consolidation properties have been systematically analyzed and studied, and through a quantitative analysis of the microscopic structure of deposited dredger fill, many important parameters such as the diameter, abundance, shape, directional frequency and directional fractal dimensions of pores have been gained, The results of the tests provide a scientific basis for the improvement of dredger fill foundation and have great significance for engineering practice.