工程地质学报2012，Vol.20Issue(6)：1042-1049,8.
高黏性吹填土固结过程中细颗粒迁移规律研究
LABORATARY RESEARCH ON FINE PARTICLES MIGRATION OF HIGH CLAY DREDGER FILL IN CONSOLIDATION PROCESS
摘要
Abstract
In the process of vacuum preloading consolidation, soft foundation is consolidated by powerful vacuum suction. A kind of soft clay has many fine particles that would be flowed to drain pipes with vacuum. The plastic pipes would be surrounded with clay. Then they would be formed with mud membrane. Through laboratory test, the course of drainage consolidation is simulated. It is aimed that the laws of particle migration can be resolved with the proposed approach. Test results confirm that the consolidation conditions affect the fine particle migration phenomenon. At the gravitational compaction consolidation stage, the fine particles are influenced by boundary conditions and seepage paths. However, at the pressure consolidation stage, the fine particles are influenced by the additional loading generated vertical pressure. Therefore, the tendency of particle migration is no more than weak. And The distribution of fine particles is changed from vertical gershgorim band to horizontal gershgorim band. Furthermore, the mass ratio of silt and clay is primary defined as aggregate clay ratio. It reflects the status of migration process. The "aggregate clay ratio" is considered as the indicator of migration. Data analysis results show that the indicator can effectively reflect the degree of consolidation. With the continuing process of consolidation drainage, the "aggregate clay ratio" is increasing gradually. It reflects indirectly the strength of high clay dredger fill. In the consolidation process, "aggregate clay ratio" is increased as the drainage velocity is changed lower.关键词
高黏性吹填土/颗粒迁移/排水固结/似粉黏比Key words
High clay dredger fill, Particle migration, Drainage consolidation, Aggregate clay ratio分类
天文与地球科学引用本文复制引用
宋晶,王清,张鹏,江小亮..高黏性吹填土固结过程中细颗粒迁移规律研究[J].工程地质学报,2012,20(6):1042-1049,8.基金项目
国家自然科学基金项目(40372122,40672180,41172236),国家自然科学基金国际合作项目(40911120044),广东省自然科学基金项目(S2012040007331)和中山大学青年教师起步计划项目(32110-3281402). （40372122,40672180,41172236）
