Characteristics Of Recently Deposited Soils Foundation Under Groundwater Fluctuation

Due to excessive groundwater in many cities of China, caused the groundwater levels todrop and the land subsidence and groundwater crisis, the reason is related with economicdevelopment model. The underground water level will be rise by a series of reasons. Researchunderground water level fluctuation on the soil mechanics indexes variation characteristics canbe reduce the geological environment disasters.Use the recently deposited soils samples for research object, in the preliminary outdoor rockdrilling sampling survey, Through the indoor model test of underground water level fluctuationand simulation of the building were changes. Use the model silty deformation test data.analyzesthe water level fluctuation and load change in under the coupled action of silty deformationfeatures. Get under the water level fluctuation silty deformation, porosity, compression modulus,the coefficient of permeability change rule, to the city ground subsidence of the harm of controlhas reference value. The main research contents and conclusions are as follows:1. The water level fluctuation of the recently deposited soils in the soil with the geologicalsurvey for the drilling sampling, standard penetration test and static touch the test data offinishing agent analysis. The test results show that that the water level fluctuation in coastal withthe recently deposited soils in the soil strata characteristics, and the recently deposited soils withlow bearing capacity of the engineering mechanics properties.2. Through the water level fluctuation in the newly sedimentary soil with inner of theoriginal powder soil and clay soil test routine analysis that bring up level fluctuation in the newlysedimentary powder soil and cohesive soil of basic physical mechanical parameters.3. The independent research and development of water level fluctuation and can simulatethe load effect of the model box devices, simulation in nature environment under the action ofwater level fluctuation recently sedimentary powder soil foundation, get the foundation soilwater level as that of fluctuation change and settling and deformation law of silty and shearstrength indexes and bearing capacity of different level index all appear phenomenon.4. Use water level rises fall change can simulate the large settlement column test device,researched a recent study sedimentary powder soil and cohesive soil of two different soil samplesin the supreme department load and the water level fluctuation when after the physical. Throughthe sampling indoor consolidation test, analysis with the water level fluctuation and the increaseof number, the newly powder soil and newly sedimentary cohesive soil of intensity index andcompression modulus is depressive, porosity and compression coefficient increases.