Today, with the rapid development of urban construction, the effect of cement pipes in urban construction is well known to us. Its appearance has brought great convenience to our lives, not only the effect of drainage and sewage, but also the regulation of water. Anti-flood effect. In the case where it is widely used in the city, how much do we know about its construction process? Xiaobian of Wanxin cement pipe manufacturer will tell you about three construction processes of cement pipe.
Three construction techniques for cement pipes: cut-out method, pipe jacking method, and shield method.
1. Open cut method, also called slot construction method. Dig trenches according to the measurement and alignment during construction. Generally, reinforced concrete pipes are used for small and medium diameter cement pipes, and concrete or brick and stone structures are used for large and medium diameter pipes. Because the cement pipe is a gravity flow pipe, the difficulty of the flow surface elevation is the key to the quality of the construction, so the construction must be strictly controlled according to the design. The sewage pipeline must be leak-proof. Leakage inspection is required after the pipeline is completed.
During the construction of cement pipes, the excavation of the road, the accumulation of materials and the excavated earthwork will cause inconvenience to the residents on both sides of the pipeline, the activities of factories, shops and public facilities. Therefore, we must do a good job in the design of the construction organization, speed up the construction progress, and insist on the orderliness of the construction site. Do not open the digging ditch across the entire line and delay the day. Safety facilities should be set up at the construction site to ensure the safety of pedestrians and vehicles in the past. Safety protection measures must be taken on both sides of the trench and underground pipelines to prevent the two sides of the trench from sinking, damaging the construction of houses, and cracking other underground pipelines.
2. Pipe jacking method. The operation pit is excavated at the position of the inspection well, and the sleeper and steel plate facing the pit of the pipe section form a solid back, and the pit walls on the other sides are used as general support. For more pipe jacking pits, continuous wall or sinking can be used for construction. A concrete floor is poured at the bottom of the pit and guide rails are laid. Jacks and irons are placed in the pit. The pipe is placed on the guide rail, and the jacking equipment has been used to jack up the earthwork space in the pipe. This method of digging while jacking is called the pipe jacking method.
Pipe jacking method usually chooses the enterprise mouth pipe or the flat mouth pipe. Before the cement pipe is jacked, first use hemp braid to embed it in the pipe tree tube D to avoid damaging the mouth of the pipe when it is jacked. interface. After the pipe section reaches the front pit, remove all expansion rings and fill the joint gap with asbestos cement. When the pipe jacking method is used for construction, the interference to ground activities and underground facilities is small, the amount of earthwork is small, the pipeline does not need a foundation, and the pipeline is in good condition. However, because the excavation takes place in the pipe, the diameter of the pipe should not be less than 90mm. Because the pushing resistance cannot be too large, the pipe diameter should not be greater than 2500mm.
3. Shield method. A shield is a large working tube with an excavator and a jacking device. The lined pipe section is pushed forward as the back seat, and the space left after the pushing is used to line the wall surface, forming the pipe body. At present, large-scale cement pipes in China have been constructed using the shield method.