Earthquake Ct Non-destructive Testing Of Concrete

People always care about degree of concrete density and features of mechanics of concrete internal structure which are in concrete NDE of civil engineering.Quality of concrete structure is one of primary parameter that to reflect quality of project, regardless of whether in tunnel, bridge or other civilengineerings.In actual project, many factors such as tanglesome address condition, poor enviroment of construction, nonstandard technics of construction, relaxed working procedure and so on.All of these may lead to vibro, cavitation and honeycombing which exit in concrete structure.Because of these, there may exit hidden trouble of quality in struture about tunnel, bridge and other civil engineerings.For this reason, quality of concrete structure always serve as primary index in detection of seismic CT of civil engineering.At the present time, there are some main methods to detect concrete quality, such as part rebound, detection of ultra audible sound, radar in fall and so on.Confirm random part rebound at scene by worker.They use schmidt hammer to read and collect data and carry out operations through explanation of detective material.It depends heavily on abundant experience of detective workers. Besides of these, reading data's record and data's treatment also exit error.This paper describe three primary aspects as follows.In the first place, describe theory of detective methods about seismic CT and feasibility of seismic CT which use in detection of concrete.Secondly, describe algorithm of imaging about seismic CT, then put forward design procedure of modification of travel-time according to problem that encounter in actual project.This method solve additional layer that on detected substance which influce seismic wave speed effectually. It makes more correctly about collected data.Compile application methods of seismic CT used in tunnel according to experience of actual project.This method expound some measures and considerations for concrete detection in detail.Besides, all of these are regarded as enterprise internal standard to execute and to apply.After that, to discuss every feature about detective aspect of seismic CT and radar in fall which are used in concrete internal structural mechanics. At last, to detect quality of concrete which is in plate of bridge, bridge pier and well by method of seismic CT.Then evaluate concrete quality of above project effectually.