Feasibility Study Of Small Core Sample Detection Technology And Its Application In Fabricated Structure

After entering twenty-first Century,the speed of China's social and economic development has been improved to a greater degree,the living standard of the people has been continuously improved,and the concept of sustainable development proposed by the government has gradually deepened into the hearts of the people.On the issue of environmental protection,the government advocates environmental friendly production mode and establishes a benign interaction between human and environment.With the continuous progress of urbanization in China,the construction industry has become one of the pillar industries in modern China.However,there are many problems to be solved in the traditional construction industry,such as the waste of resources,environmental pollution problems and security risks,high labor intensity,low degree of construction mechanization and so on.The industrialized building characterized by assembly has realized the standardization of design,the industrialization of parts,the mechanization of construction and the scientific management.It is the development direction of the modern construction industry,and it is also one of the main directions for the experts of the construction industry to seek the breakthrough of the technology.In the fabricated structure,the concrete structure is made up of prefabricated components as main components through assembly,connection and partial cast-in-place.Its main components are manufactured in prefab factory,and then transported to the scene for assembly.Compared with the traditional construction industry,it saves time,increases efficiency,reduces labor costs,and saves energy and environment,saves resources and saves construction costs.People's attention to the fabricated structure,besides energy saving,environmental protection,cost reduction and work efficiency,is still more concerned with structural quality and safety.Compared with traditional construction industry,there are few researches on assembly structure detection technology at present.Whether the assembly can be recognized by the society,whether it can be accepted by the vast number of residents,the quality assurance of the structure is the key factor,and it is also a direction for the construction industry to be in urgent need to explore.This paper is mainly composed of two parts.The first part is about the experimental technology research and experimental data analysis of 50 mm small core.Through the sampling of the assembly structure entity components,the experimental data are analyzed,and the results of data analysis are used to further verify the applicability of the 50 mm core sample to the concrete strength detection.This paper compares several commonly used detection methods in engineering,and selects a suitable method for solid core drilling.In this paper,the influence of the diameter change of the core sample on the strength is studied,and the strength conversion coefficient is determined.The experimental result of the small core sample is compared with the strength of the standard specimen.Core drilling is a local damage detection method.This paper studies the size deviation and uncertainty of drilling core test results,and demonstrates the confidence interval and confidence level of batch testing.In the second part,through the experimental research and the related software simulation analysis,the internal force distribution law of the assembly structure is obtained,which provides the basis for the formulation of the small core sample drilling scheme for the structure quality detection.Through the study of the laminated shear wall,the force performance and the internal force distribution law of the laminated shear wall are obtained.According to the law of internal force distribution,the number and position of the small core sample are determined,and the useful quality inspection conclusion is obtained.