Deformation Monitoring Analysis And Stability Evaluation Of Diaphragm Wall Inlfuenced By Construction Load

Diaphragm wall is a kind of water proof structure with low permeabilitycoefficient, which is normally around1×10-7cm/s. The premise of the diaphragmwall play a role in seepage control is its own stability. The evaluation of thediaphragm wall is not only the to determine the permeability coefficient, but also toconsider the construction process and the external influence after construction. Thedegree of influence is concerning if the diaphragm wall will occur irrecoverabledeformation, substantial damage, stress corrosion or local seepage control functionlost. All those factors are the important information needed during the constructionperiod and future reservoir operation, and it has significant meaning to ensure thesound of reservoir and the seepage proof stability of reservoir area.This thesis based on the project of analysis and evaluation of construction loadinfluence on existing diaphragm wall of Daning storage reservoir in midline south-tonorth water diversion project, conducted the research on the multi constructionmechanical effects of typical cross section of west embankment diaphragm wall ofDaning reservoir by monitoring, back analysis, numerical simulation.The main contents are as follow:(1) Choose the reasonable monitoring cross section and monitoring scheme byanalysis the in-situ working conditions, in order to make the monitoring resultsreflect the whole diaphragm wall deformation and stress state.(2)Using the monitoring equipments installed in the diaphragm wall to monitoringthe deformation, pressure, stress and strain, results of inclinometer, then inverseanalyse the stress-strain state of the whole diaphragm wall.(3)Based on the real time monitoring data and partial inverse parameters, built thenumerical simulation model to predict the mechanical behaviour during theconstruction.