The Study On The Dynamics Characteristics And Effect Of Engineering Of The Special Soil In Liaodong Bay

There are widely distributed with dredger fill，soft soil，sand and other special soil inthe coastal zone of Liaoning province.Along with the human engineering activity andcrustal tectonic movement，the phenomenon of sand liquefaction and soft soil subsidenceare more serious and frequent.They are of great disservice to the construction.This paper takes reclamation soft soil，sand and other special soil of the Yingkou-Panjin area near the Liaodong Bay as the basis，combining with National High TechnologyResearch and Development Program of China (863Project) named “Research on hot dryrock engineering test in target area and artificial fracturing technology”(No:2012AA052801)、Specialized Research Fund for the Doctoral Program of HigherEducation named“Research on numerical simulation and evaluation of multiphase fluidcontaining CO2act on mudstone fracture underground”(No:20110061110055)、thenational natural science foundation named“Research on the modeling process of selectingthe area of concealed water and heat resources”（No:41372239）and Chinese geologicalsurvey in the geological environment assessment:“a case study of special soil problemsand influence to the construction of projects in Liaodong Bay area (No:1212011120088)” we analyzed the forming environment conditions, the genetic type and distribution law ofdredger fill、soft soil and sand in the Yingkou-Panjin area.And based on macroscopicmechanical tests and microscopic tests, we investigated different structural property andmechanical model.The purpose of this investigation lies in exploring the developmentregularity,dynamic characteristics and engineering influence of soft soil in coastal zone inthe Yingkou-Panjin area.Firstly，according to the report data，in situ test data，laboratory routine physicalmechanics experiment，author based on the static research，designed5groups of dynamictriaxial test， and carried out a number of groups of scanning electron microscope(SEM).By these tests，author get some the physical and mechanical parameters of somesoil under dynamic load and deformation rule， and then calculate the liquefaction indexto divide region partition，at the end of this paper，author make use of the softwareFLAC3D， studied the effect of the seismic load and mechanical vibration on the specialsoil physical and mechanical properties of the area， simulate the soft soil settlement inthis region and the formation process of sand liquefaction and variation analysis of special soil in this area under the power action and provide reasonable suggestions for engineeringconstruction，social production and life.Secondly，according to the physical mechanics，investigation report and laboratorytest in this paper，author set reasonable parameters，peak acceleration and frequencytuningof the El Centro earthquake wave using SeismoSignal filtering software，the peakacceleration were adjusted to0.15g，after the baseline adjustment.Adjusted for theacceleration time history curve fitting integrated from acceleration time history curve byusing Origin software， after the baseline calibration， Byrne Model is calibratedacceleration time history curve of import completed calculation，select the15units in5different soil level monitoring，record2.5s，5s，7.5s，10s in different time point，differentdepth of the acceleration，deformation，stress and pore water pressure ratio curve，obtained level ground by loading the seismic wave dynamic response rule.Furthermore，the effect of mechanical loading on the levels of free soft site ismainly due to its periodic and persistent， this paper author make use of input harmonicwave to the level of free soft soil site to simulate the mechanical wave. The stress andvertical displacement of the level soft soil site are recorded in the vertical simple harmonicwave of5s，10s，15s three time point，through comparative analysis the stress anddisplacement of the level soft soil site gradually decreases with the increase of depth. Thesame soil displacement with time increases， but the increasing trend is graduallyreduced，.These show that the mechanical strength of the soil under dynamic loadperiodically was enhanced after elastic deformation to plastic deformation，at the sametime the displacement and deformation of the soil decreased.Finally，through the design of the dynamic test of soil sample in the special soil siteof the Yingkou-Panjin area.， author measured the area of soil physical and mechanicalparameters， and accoding to the analysis of the dynamic characteristics of theseparameters，get some regularity of the special soil under dynamic loadfinally，to providesome useful reference for the construction of the projects in the coastal area of theLiaodong Bay.