Research On The Safety Evaluation System Of Prefabricated Concrete Construction

In the background of "difference" program and the request of the "double carbon targets",prefabricated construction accounted for in the new buildings will be further improved,the provinces and cities at the same time also developed the relevant policies,to make clear in the construction of the city of the future,will continue to prefabricated construction as the gripper,deepen the transformation,innovation and development of the construction industry.Compared with traditional buildings,prefabricated buildings have more significant advantages in energy saving,material saving and emission reduction,which plays a very important role in promoting the construction engineering industry to move towards green,low-carbon and environmental protection.With the continuous landing of prefabricated building projects,the construction safety problems have gradually emerged,which to a certain extent seriously restricted the development of prefabricated building.Therefore,in order to make the prefabricated building can be more healthy,steady and sustainable development,it is particularly important to build a safety evaluation system that can objectively reflect the actual safety status of the prefabricated concrete building project.The main contents are as follows:First,the system analysis on the basis of summarizing the relevant research results,through literature review and case analysis,on prefabricated concrete building construction safety of the initial indicators,and then carries on the grey correlation analysis to remove redundant indicators,finally build up the scientific and rational construction safety evaluation index system of prefabricated concrete.At the same time,in order to make the interviewees fully understand the connotation of each evaluation index and make more accurate judgment,the connotation of each evaluation index is explained in detail at last.Secondly,using the G1 method and the CRITIC method to subjective and objective weighting of each security evaluation index,and then use the method to return a method of combination of empowerment,the contrast study on the safety evaluation methods commonly used at the same time,combining the characteristics of the prefabricated concrete building with matter-element method as the safety evaluation of the present study method,and its deficiency is improved,Finally,the improved matter-element extension model of prefabricated concrete building construction safety risk assessment based on asymmetric proximity criterion is established,and then applied to a residential project under construction in Shenyang,Liaoning Province.The results show that the model can reflect the actual safety status of the project scientifically,objectively and accurately.Finally,sensitivity analysis was carried out on the safety evaluation index,the final screen has important effects on the construction safety indicators,so that the site managers can take targeted measures,rapid increase of prefabricated concrete construction project overall safety level of the construction site,effective to prevent safety accidents.In this thesis,the safety evaluation index system of prefabricated concrete building construction is further detailed and improved,and the improved matter-element extension model of prefabricated concrete building construction safety risk evaluation based on asymmetric proximity criterion is established,which can not only objectively evaluate the safety risk of prefabricated concrete building construction The real evaluation can also analyze the risk factors that have a great impact on the safety of on-site construction,and provide quantitative support for the optimization of the safety control measures for the construction of prefabricated concrete buildings...