【正文】 excavation road digging road embankment in the exchange of frequent dig deep to reinforcing must be designed and increase the corresponding budget, Secondly, the cement concrete pavement to support the solid, must solve basic resistance to erosion and deflection uniformity problem, namely to choose suitable for this region climate characteristics and 14 demands of basic types traffic reasonably design, excellent performance and appropriate aggregate gradation of paving, For highfil1 soft and in Taiwan back filling carefully, on the basis of the disposal if foreseeable settlement, can adopt thin layer of asphalt concrete pavement of excessive or block form, For settlement after construction, permanent stability of concrete pavement, board, In the underground water, roadbed grassroots high and more rain area, should consider the design of drainage gravel pad peration. Cold region should be prehensive consideration of the design of drainage and antifreezing cushion. At the same time, ensure the quality is to prevent the seam of cement concrete pavement damage of natural conditions, according to local key seam bulge, so try to be long in joint design should choose reasonable joint type and fine seam filling materials. Construction Reasonable selection of raw materials, strictly control the quality of materials is to realize the quality of cement concrete pavement design and use of science, accurately, concrete proportioning design, production, uniform concrete is to guarantee the quality of cement concrete pavement of key, Promote the use of mechanical construction method is to solve the good quality of cement concrete pavement panel and favorable measures, the specification, location, lever must ply with the design requirements, spacing, with the joints with vertical 15 wall surface plate and road line parallel. The concrete for caulking caulking board and general difficult time of influence, casting, vibrating closegrained seams low strength of concrete, should strengthen the juncture of vibration and deflection, Plate forming, according to local conditions of temperature and time, avoid cutting strict regimen appeared in whole or in health in hydration of cement concrete under the gap, intensity, Should as far as possible, if there is difficult to recognize construction of concrete construction, dominica, must avoid big pit slot and rocks, lest cause in the initial period of concrete panels vibration caused by driving plate fracture, When the line longitudinal grade super 2% should adjust paving, must follow up direction paving. To avoid problems caused by collapsbillity board tiny crack and plate fracture, dismantling formwork should avoid to touch off the symmetry deflection gnawed edges. The construction of grassroots materials, mixing, and focus on using paver, stay on the paving grassroots pacting, strictly on health, prevent grassroots appear dry shrinkage or temperature crack, In order to reduce the roadbed paction deformation of soil subgrade, increase strength and stability, must be carefully for paction, especially to strengthen DiBian road embankment, lateral part of RCC density as uniform, Don39。t matter causes, local and loose phenomenon, grassroots strength to meet the design requirements. In the traffic load, concrete slabs of the tensile stress increases and overloaded vehicles, concrete slabs finded may produce big load stress and strength. In addition, due to the construction of concrete pavement thickness of local area and the concrete proportioning design under strong in load of concrete pavement, the vertical load cannot afford shearing force, leading to the road, crushing plate can. design cement road surface defects of the disease When the design calculation of traffic prediction accuracy, and not thin layer thickness of design, design slant equivalent axle load models according to standard due to the rated load conversion, but in recent years, the rapid growth in volume overloaded vehicles increasing outofgauge axial load, the design and practical, it will greatly influence the life expectancy by cement. maintenance, aggravate the pavement Maintenance, seam filling contraction joint, cement road construction, construction joints, when filling with bitumen is basically, use monly 2 ~ 3 years of material itself, if not loose aging timely rain fill wseam material update, and infiltration, damage caused by board cushion, the deformation 12 and damage joints. The first project construction funds is inplete, remaining drainage ditches to conserve water, water because of lack of funds can39。 9 The first chapter of the outofflatness of cement concrete pavements Currently produces diseases, there are several reasons, Water is one of the prevention and control of soil subgrade enough, and underground water high embankment, 2 is overweight load, Three is the construction quality, Four defects in design, 5 is the maintenance, These defects in addition to design and construction quality factor of reason, be in monly driving and all kinds of natural factors, while water formed under overweight and load is a major factor. is the formation of A few years ago the cement road surface are using asphalt, longitudinal seam filling for construction seam not blind ditch shoulder seam, drainage facilities without basic. Especially the first project construction period of cement pavement performance, inadequate understanding, a considerable number of drainage facilities. If not timely maintenance, after years of driving effect, a road between mutual extruding, original plate surface crack joints fill wseam material of spalling damage aging. The rain perated through the crack joints, grassroots softening grassroots. Another kind