Legal analysis: the prefabrication of cross piles and warning piles adopts centralized prefabrication. According to the design requirements, the protective layer should be poured first, then the prefabricated steel bars should be put in, and then the second layer should be poured in layers. After tamping with vibrator, pour the second layer. After the casting reaches the solidification strength, the mold is opened and the surface is covered with film for curing. 3. Excavation of crossing pile and warning pile foundation The construction tools of crossing pile and warning pile have the characteristics of large fluidity and fragmentation. The foundation is excavated manually, and the bottom is leveled and compacted.

Legal basis: Article 39 of the Road Traffic Safety Law of the People's Republic of China, the traffic administrative department of the public security organ may, according to the specific conditions of roads and traffic flows, take measures such as diverting traffic, restricting traffic and prohibiting pedestrians. In case of large-scale mass activities and large-scale construction, etc. If it is necessary to take measures to restrict traffic or make decisions directly related to public road traffic activities, it shall be announced to the public in advance.