|
Of cement concrete road was built in the mid-1960s, most of the early construction of the cement concrete pavement has been close to or exceeded its design life, most of them appear damaged, repair or reconstruction of old cement concrete pavement is inevitable. Transformation of old cement concrete pavement and asphalt overlay with a short construction period, traffic, less investment, driving comfort, etc., has become home and abroad, a simple and effective repair measures. 316 State Road, Shiyan paragraph (K1549 850 ~ K1582 120) is a major road in Xiangfan City, Hubei Province, Shiyan City, Shiyan City, an important channel leading to the central region. The design grade secondary roads TERRAINS After years of large traffic operators, most of the sections of cement concrete pavement structure in 2002, large-scale damage, must overhaul. Currently, few technology available for reference on the old cement concrete pavement repair mature experience, 316 State Road, Shiyan section of dingjia camp town transit the sections (K1571 600 ~ K1573 800)'s old cement concrete pavement test sections, close contact with its the actual renovation project, through traffic survey and evaluation, system analysis and study of the program design, theoretical analysis and the construction process, the formation of complete sets of technology of asphalt overlay on Old Cement Concrete Pavement. Control the emergence and development of reflective cracking of asphalt overlay key to the successful transformation of the old cement concrete pavement. In this paper, a detailed investigation and evaluation of the old cement concrete pavement under the premise of a variety of diseases of old cement concrete slab to take appropriate measures in order to increase the carrying capacity of the old board. Structural design of asphalt overlay sections of road characteristics for research to explore a variety of design methods for asphalt overlay layer retarding reflection cracks and development the Treatment of measures and construction techniques, including geotextiles, glass fiber geogrid new material. Asphalt overlay critical load position when the load stress stress state analysis using ANSYS FEM program, and verify the reasonableness of the test section overlay design. Composite pavement structure layer parameter analysis, for subsequent cement concrete pavement repair and remodeling program design, decision-making, provide some useful experience and learn from.
|