The Xi’an Bell Tower Foundation Damage Analysis And Moisture Field Research

Based on situ measurements and back analysis of Bell Tower foundation under rainfall and seepage condition for more than 10 months,In this paper,It explores foundation moisture field characteristics by moisture field inversion and numerical simulation.On the macroscopic analysis of drainage pipe drainage efficiency,time domain reflectometer,etc.,a variety of analysis before and after the rain,coupled with the electromagnetic field and moisture field back analysis is done to find out the main reason of the seepage damage of the Bell Tower.The main conclusions are as follows:(1)The drainage efficiency remain at around 83%in internal foundation,and infiltration after its hydrops amount to less than 12%of total rainfall by site hydrology test.Side reveals base leakage reasons:rainfall infiltration and drainage pipe drainage weakened,waterproof layer under the aging failure,as well as the internal may be empty,wet softening,the formation of fine particles by erosion outflow seepage channels,etc.(2)By situ detection of natural foundation,top and bottom foundation,The article analysis internal moisture content changes before and after the contrast and the rain,then article concludes the results:underground water level,water flower bed influence on base damage is not serious,is induced by rainfall infiltration base of the main causes of water disasters.(3)By geological radar detection,the article compared the wave reflection of the pillars,the sea aprons top and wall.Then the article intuitively showed these parts of the area,combined with 3 d slice figure of moisture fields of aprons and walls.Aprons top infiltration point location and infiltration channels of walls were quantitative analyzed and confirmed test results of the fourth chapter.(4)Compared with all of irrigation in 13 years,The infiltration amount migrated to the internal foundation was less.And predicted seepage in 50 years,base internal volumetric water content had no obvious changes.The overall permeability vector toward is beneath the ground,and very few water infiltrated into the foundation.(5)Moisture infiltration was not well versed in the securities gate arch and arch waist in the early,but with the increase of time,gradually formed through inside form Rainfall in 600 the results of numerical simulation.Outside the wall infiltration rate and volumetric water content value was bigger than other parts,accord with wall leakage diseases worse than in other parts of the earliest time.And due to the blocking of water stop curtain,the foundation below saturation line up rate is higher than outside the foundation.