Reinforcement of the corners The corners of the underground continuous wall are the weak links in the construction, and are prone to irregular corners, unconsolidated concrete, difficulty in lifting steel bars, deformation and leakage. In order to prevent this phenomenon, our door adopts the thickening of the guide wall at the corner, which strengthens the constraint on the corner of the underground continuous wall, and has received good results.
Conclusion
The supporting structure of the cutting channel of Tianjin Haihe West Road has completed a total of H085m, underground continuous wall and 37403m cement mixing pile.
After the excavation of the foundation pit, the bottom of the pit is dry, and there is no water leakage or large deformation of the walls, which provides good working conditions for the construction of the cut channel, so that the project can be successfully completed according to the requirements of the owner. For the new pipe to be built, coating anti-corrosion material in the pipe is the main method to prevent the corrosion of hydrogen sulfide.
The overall repair of the pipeline is severely corroded by hydrogen sulfide, and the overall structure is damaged. At this time, the pipeline needs to be repaired. The repair methods are usually divided into excavation repair and non-excavation repair. In places prone to corrosion, the use of anti-corrosion pipes is one of the measures to control the corrosion of hydrogen sulfide. Plastic pipes (PE, Pvc, etc.) and ceramic pipes are protected from hydrogen sulfide.
Conclusion
The corrosion of sewage pipes by hydrogen sulfide is a very common phenomenon. Controlling corrosion effectively is a serious challenge facing drainage management workers. The ideal measure to prevent hydrogen sulfide corrosion is to take measures before or at the beginning of corrosion to prevent the generation of hydrogen sulfide.
Only when the degree of corrosion is serious should the pipeline repair be considered, so that the economic loss of large-scale pipeline repair can be avoided. To this end, it is necessary to establish a system to carry out frequent inspections and inspections of pipeline sections that are prone to corrosion to prevent them from happening.
With the improvement of China's urban water management level, we will definitely gain more experience in the monitoring and control of hydrogen sulfide corrosion of sewage pipes.
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