Study On The Application Of Cement Concrete Pavement Repair Technology

This paper mainly based on the investigation of the road, according to the existing road design theory and construction technology method, improve the pavement design method(mainly by improving the target design index system to achieve), reasonably determine the construction method, the special research construction process difficult points and points, and ultimately guide the construction practice.The basic train of thought of the research follows the white changing black engineering implementation process, namely from the old road assessment of the sequence for the formulation of scheme, scheme design, concrete construction and comprehensive evaluation.Combined with the actual situation of the old cement concrete pavement in Qinhuangdao, the paper introduces the contents of the old road conditions, making up a strong plan, adding the plan design, white to black concrete construction and comprehensive evaluation:(1) On the basis of the theory of overlay design in China, the design of typical asphalt overlay is optimized;(2) In the research on the key problems in the petrochemical industry, the key points of the control index and the construction of the practical situation in Qinhuangdao are put forward.Through a systematic study, the following conclusions are drawn from Qinhuangdao white to black Technology:Using the typical pavement structure reinforcement with road design standards, specifications and the hammer crushing technology also has strong operation and Qinhuangdao City White change black the whole technical system temporarily does not need a large adjustment. But we should improve from the following three aspects:(1) Pay attention to the old road damage assessment work, fully do the old road comprehensive survey work, should establish a comprehensive testing index system, should change the static deflection index as the dynamic deflection index, better evaluate the old road condition, in order to avoid the design scheme or the design change;(2) In the design stage, the carrying capacity is the core element of the white to black technology, and it is not satisfied that it should be set up. If the condition can take measures to reduce the reflection crack, it is not easy to adopt the method of reducing the intensity of the original pavement, which is based on the increase of the interlayer;(3) The use of broken petrochemical construction must be done before the preparatory work, strict control of construction quality.(4) Improve the construction process of the maintenance work, drainage, protection and other ancillary facilities should be complete;(5) For crossing or other special sections should adopt the reinforcement measures; to strengthen the maintenance and management of the operational phase, in particular, to reduce the adverse impact of the overloading of vehicles on the road, and to improve road durability.