The Research On Models And Methods Of Engineering Deformation Monitoring

With the acceleration of engineering construction and the improvement of science and technology in China,many major projects keep emerging,such as large storage tanks,high-rise buildings and mines.The research on the models and methods of engineering deformation monitoring is of great significance to ensure its safe construction and normal operation.Petroleum reserve is an important strategic measure of energy in China,which can effectively solve the problem of petroleum shortage and ensure the sustained and stable economic growth.In recent years,China has stepped up the construction of oil reserve projects,and large and super-large storage tanks have become the development trend.Meanwhile,higher safety requirements have been put forward,and strengthening the deformation monitoring of oil storage tanks has become an important work to ensure the safety of oil storage.Nowadays,with the rapiddevelopment of urban construction,the safety problem is becoming increasingly prominent.When the tilt is too large,it will seriously affect its normal operation and surrounding safety,so it is more important to monitor the tilt deformation of the buildings during the construction and operation stage.Mine shaft is the only passageway connecting the ground and underground,bearing the important functions of transportation,ventilation and communication.For the influence of long-term external force and geological conditions,the shaft will produce deformation in different conditions.Therefore,vertical shaft deformation monitoring is of great significance to ensure the safety of mining production.This paper studies the models and methods of deformation monitoring for the above three projects,and the main results are as follows:(1)The application of measuring robot technology in deformation monitoring of oil tank was described in detail.To solve the problem of heavy measurement workload outside the tank,an improved observation method was proposed,that is,Leica TM30 measurement robot was used to set up at the control points outside the tank to collect the required data.Meanwhile the calculation formula of deformation parameters was deduced.Combined with an engineering example,the accuracy and practicability of the proposed method were verified,and the deformation analysis was carried out in detail.(2)In order to solve the problem of complex structure and the difficulty of setting up instruments externally in urban high-rise building inclination measurement,the subregional regression model was put forward.By equipping settlement monitoring points on the inside of the building,the periodic settlement was measured,and the settlement surface of the foundation was fitted by subdivision,so as to determine indirectly the oblique angle and direction of buildings based on the relationship between foundation settlement and overall inclination.Compared with the total station tilt measurement,results showed subregional regression model can meet the actual engineering requirements and it has better precision and feasibility than regression plane model.(3)Focusing on the theory and technology of shaft deformation monitoring using laser datum,aiming at the problem of short measuring distance caused by laser dispersion,the key technologies such as the establishment and transmission of laser datum and the solution of laser point coordinates under the new datum were deeply studied.The proposal of multiple distance intersection method and plane coefficient transformation method improved the practicability of the method.Finally,the accuracy of the proposed methods was verified with an engineering example,and the deformation state of the shaft was analyzed in detail.