In all kinds of construction and municipal construction projects, such as existing fence or fence, generally adopt rigid materials, even using the flexible material safety net also needs prior to erection of steel pipe support. The fence or barrier in the process of engineering building need frequen

With the rapid development of social economy, the urban scale expands unceasingly, the existing city flood control pipe often can't bear the heavy rain, causing the road was flooded, traffic jams, and even homes were flooded, a serious threat to people's life and property, cause huge economic losses

　With the continuous development of highway construction project, for highway engineering construction people are no longer limited to the engineering requirement for construction quality, progress, but more the requirements of the engineering construction of perfection, to ensure that highway lands