Research On Reconnaissance Of Surrounding Rock Mass Of Joints And Fissures And Its Evaluation Of Construction Detection In The Water Tunnel Of Nuclear Power Plant

With the rapid development of national economy in China at present,energy demand is rising rapidly,faces a major adjustment of energy structure,clean environmental protection of the nuclear power is becoming a focus of the development of new energy,especially the large-scale construction of coastal nuclear power plant,is playing an important role.Nuclear power plant water intake project with tunnel and ditches and draining water cooling circulation mode,such as water will inevitably encounter in the process of tunnel construction in complex geological environment,joints and fissures,high ground stress and other issues.Due to plant drainage tunnel safety grade is different from general building,its mechanical properties and stability in the construction process research is particularly important.To this end,this thesis nuclear power plant water intake tunnel surrounding rock survey and construction joint detection,in nuclear power plant water intake tunnel design,construction and mechanical properties.Thesis on the basis of summarizing a large number of literature at domestic and abroad,carry out the tunnel excavation and supporting,tunnel slag and lining,at the beginning of the tunnel support design,the classification of surrounding rock and supporting tunnel construction,tunnel construction organization research;Technology for tunnel engineering investigation,testing and evaluation,for high density resistivity method,and the earth controllable source audio frequency electromagnetic method,acoustic method to test the quality of tunnel and ground penetrating radar(GPR)testing method and means of the quality of tunnel research;Given the tunnel mouth joints and fissures reconnaissance and evaluation,dense fracture zone joint survey and site geological conditions,geological structure,joint fissure dense fracture zone site hydrology geological condition,the permeability of rock and groundwater chemical characteristics,tunnel water inflow estimation,and joint fissures dense fracture zone evaluation and analysis of geotechnical engineering conditions;For tunnel construction technology and measures,inlet side cut into the stone and slope protection construction,the inlet and outlet measures,V grade rock section lane construction method,and the wrong IV level period of the construction method of surrounding rock,primary support,long pipe roof construction method,construction method,the grouting engineering and anticorrosion construction and analysis;In tunnel construction quality testing and evaluation,carries on the tunnel construction site radar detection,ground penetrating radar(GPR)test data processing and interpretation,figure and ground penetrating radar(GPR)to detect abnormal summary analysis.Through the investigation and construction detection of tunnel surrounding rock joint,its research results applied to the engineering practice,make the water tunnel more economic,reasonable and safe.