| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 97 === Recently, the amount of Taiwanese increases. The people’s livelihood also increases. People want to have better quality of life. The government lays pipes under the road. In order to convenient to fix or maintain the pipe, the pipe organization set up many manholes. As a result of bad plan, the amount of manhole is amazing. We can see manhole on the road anywhere. It will produce many problems for road user. Therefore, the government has tried to carry out the Plan of Road Smoothness since 2007. Manhole cover is undergrounded that be a very important item in this plan.
Although manhole is undergrounded that can solve many problems, for pipe organization it will produce more problems. It will let pipe organization fix or maintain pipe not easy and quickly. In the future, if pipe organization wants let manhole has same height level with road surface, they have to pay the outlay by themselves. It is a huge load for pipe organization. Therefore, this study wants to use the concept of roughness to evaluate the policy of underground manhole. First find the relationship between the amount of manhole and IRI. Next simulate the manhole that have the same level with the road surface. Then inspect the road which has already let the manhole underground. In addition to compare whit the road this doesn’t let manhole underground. Final, according to the information of inspection which has been half years to find the period that the smoothness of road which will be influenced by underground manhole. Beside this, this study will interview the pipe organization and road management organization. Final, this study will provide some suggests for the policy of underground manhole.
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