| dc.description.abstract | In recent years, domestic traffic significantly increases the through long-term accumulation of vehicle loading, resulting in a decline in pavement roughness itself. In addition to long-term cumulative traffic load, the internal pipe trench for the sewer construction projects and an increase in demand, often due to pipeline laying , maintenance or relocation reasons and laying of road excavation, thereby affecting smooth of pavement, to resolve this issue, government units are strongly in the case of road smooth and set up manhole.
In addition, the exposed road surface, depression, the laying interval is too dense for the use of pedestrians passing through the shock generated when a sense of the obvious discomfort of the human body. Pipeline flush or manual adjustment hole buried down after the operation, maintenance and strengthening of manholes produce material damage occurred, or manholes buried down the road led to destruction or damage occurring phenomenon, but also the impact on pavement smoothness. The calculation of cable pull for another analysis, consider the current set of laws laid length elongated, to facilitate the number of manhole covers to reduce manpower.
After the research results of sensitivity analysis and comparison of sorting can be applied to fully understand the manhole covers flush with the case for road flatness covered by the hole the size of the effect of the number of smaller facilities for the manhole cover itself is a normative value of flatness of the road lead to a greater influence.
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