Experimental Study On Re-formed Structural Strength Of Stabilized Dredger Fill

In recent years, using dredged fill technology to build new lands became an important meants in coastal areas. In the inland areas, the dredge fill technology researches were carried out successively. This article follows the pre-reinforced idea of hydraulic fill, the pre-reinforced idea is that adding curing agent into the mud during the hydraulic fill process in order to improve the performance of hydraulic fill. We took marine silt from Shanghai and lacustrine silt from Wuhan. Compare the micro-macro features of the re-deposit and settlement process; Explore the effect law of the selection and the ratio of the curing agent; Use FLAC fast Lagrangian analysis of continuous media consolidation agent program to simulate the consolidation behavior of the hydraulic fill. An important quantitative foundation for further study on characteristics of dredger fill and consolidation mechanism has been provided.The main work and conclusions are listed as follows:1. Take silty soil of Shanghai and Wuhan for the study, based on the previous researches, study mainly on the consolidation effects of marine and lacustrine silt which adding two and three composite curing agent. Choose the best combination and ratio of the curing agent, study the moisture content and the age of the soil samples on curing effect preliminary.2. The sediment column test was done to simulate the surface sedimentary situation of dredger fill which with different soil-water ratio and adding different curing agent indoor.The test results show that adding curing agent during the hydraulic fill process can improve the consolidation behaviour to some extent.3. The dosimeter-sediment test was done to simulate the deep interior sedimentary situation of dredger fill which adding curing agent indoor.Measured the engineering geological properties of the solidified dredge fill, the test results show that the engineering geological properties of the solidified soil has improved significantly.4. Use FLAC fast Lagrangian analysis of continuous media consolidation agent program to simulate the consolidation behavior of the hydraulic fill. The simulation results are compared with the indoor experimental results, they are consistent basically.5. The achievements of this research are summarized; the later tasks are also prospected.