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A box-shaped pipe culvert prefabricated in the factory using high-strength reinforced concrete is used for hoisting and connection at the construction site. The box culvert can be widely used in power tunnels and urban comprehensive pipe corridors, commonly known as prefabricated concrete square pipe culverts.

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　　A box-shaped pipe culvert prefabricated in the factory using high-strength reinforced concrete is used for hoisting and connection at the construction site. The box culvert can be widely used in power tunnels and urban comprehensive pipe corridors, commonly known as prefabricated concrete square pipe culverts.

　　Prefabricated square culverts are connected by pc steel rods to generate prestress, which can effectively deal with problems such as land freeze-thaw and earthquakes. The prefabricated square culvert used for drainage has two waterproof grooves at the joint, one is filled with grout, and the other is pre-buried with rubber waterstops at both ends of the square culvert. It can prevent internode water leakage. Compared with the traditional on-site pouring construction, the construction period can be greatly saved, and at the same time, due to the small construction area and less waste generated, the impact on the surrounding environment can be reduced. The underground pipe corridor can effectively avoid the appearance of "zipper road". After completion, only wiring needs to be carried out inside the square culvert, and there is no need to repeatedly excavate the road. Once a new cable is added, just put it in from the entrance. In the future, "electronic eyes" will be installed on the top of the pipe gallery for round-the-clock monitoring. When the pipeline network encounters a problem, the monitoring system can be used to find out the reason at the first time [1]. [2] In the future, an "electronic eye" will be installed on the top of the pipe gallery to monitor the inside of the pipe gallery around the clock. When the pipe network encounters a problem, the pipe gallery can find out the problem at the first time with the help of the monitoring system, and carry out timely maintenance, which can not only ensure the speed of maintenance, but also ensure the quality. A slope-shaped water collection tank should be reserved on the side of the bottom plate of the pipe gallery. Once there is accumulated water inside, it can flow along the water collection tank to the water collection room for centralized treatment. Although the outside of the pipe gallery is made of steel and concrete, in order to ensure safety, two more layers of waterproof paint are required. In addition, according to the project requirements, each section of the pipe gallery must have an expansion joint, and the expansion joints are connected with rubber waterstops with steel edges, and then concrete is poured outside to prevent leakage.

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