Trenchless Treatment Technology And Effect Evaluation Of Pavement Diseases In The Operation Period Of The Talus Section

In recent years,the construction of the West has become the key area of economic construction in china,the new construction and expansion project of highway is the focus of urban construction in Western china.Guizhou,located in the southwest,highway construction select the line often takes along the mountains and the rivers,the mountainous area experiences the long time weathering,the rainfall and so on function to produce the structure complex accumulation body.The accumulation section highway is affected by the bad engineering geology and becomes the frequent area of the disease.Most of the highway pavement diseases still use the traditional excavation technology to deal with,the project is large,expensive and affect the normal operation of the highway.Therefore,it is of great value in engineering application and far-reaching social significance to study the trenchless and rapid technology of subgrade and pavement diseases of accumulation segment.With the road subgrade and pavement diseases of talus area as the research object.The subgrade and pavement diseases of the talus are studied,combined with the characteristics of pavement disease treatment in the operation period of the talus section,makes a systematic and deep research on the technology of trenchless treatment and the main results are as follow:(1) The main disease types are summarized,occurrence and development mechanism and disease mechanism of the subgrade and pavement in talus area.(2) This paper puts forward the technical system of trenchless treatment of subgrade and pavement diseases in talus area,the technical process and the effect evaluation methods based on chemical grouting.(3) Combined with X235 Yu Ma line surface subsidence disease treatment engineering,the paper puts forward the method of evaluating the effect of the chemical grouting as the core of trenchless treatment technology which is mainly composed of means of deflection and ground penetrating radar.(4) In order to determine the best time for trenchless treatment of the talus,the life cycle method is introduced to establish the prediction model of the pre-maintenance time of the effect-cost ratio method.