The construction problems are as follows:
1. Quality assurance of municipal water supply and drainage pipeline engineering components
It is necessary to improve the quality and technical control of components in the construction of municipal drainage pipeline project. It is necessary to select a manufacturer with technical qualification and quality assurance as the component provider, and make technical determination of municipal water supply and drainage pipeline system, as well as visual inspection and technical inspection before component procurement. Internal pressure test and external pressure test shall be carried out for important components during construction to strictly control and guarantee the quality of municipal water supply and drainage pipeline components.
2. Do a good job in trench excavation and support construction
Before excavation, carefully analyze the drawings, carry out work in accordance with the drawings and process regulations, and carefully check the values of the corners of the site. Determine the excavation mode of the trench according to the actual condition of the soil. For example, those areas with deep pipelines shall be excavated in trapezoidal mode. If the construction work is carried out in the area with poor geological conditions, slight landslide and less groundwater, the mixed trench shall be excavated. If the equipment is used to carry out excavation, the protective layer shall be reserved in advance below, and the general size is about 30cm. In the initial stage of the activity, it is necessary to control the temperature change, and try to avoid the foundation trench being soaked in water. If the base is rock, it is necessary to increase the depth of excavation in a timely manner, usually 30 cm. If the bottom of the trench is soft foundation or there are other objects, it is necessary to report to the relevant agencies in a timely manner, and then study the countermeasures. If the groundwater level is very high, drainage work should be done at this time to ensure that the water level is two meters below the activity area, so that floating pipes will not occur. In addition, the foundation trench shall be prevented from being exposed to the external environment for a long time.
3. Control the installation quality of water supply and drainage pipes
In the installation and construction of municipal water supply and drainage pipelines, the internal pulling method and external pulling method are usually used. The internal pulling method inside the pipeline and the external pulling method at the top are used to slowly connect the two different water supply and drainage pipelines. The internal pulling method of the pipeline refers to placing an inclined beam frame in the installed pipeline, placing a beam at the external interface of the pipeline that has not been installed, and then connecting the beams placed in the two pipelines with wire ropes. The external pulling method of water supply and drainage pipes refers to the use of steel wire ropes to connect the pipes outside the installed pipes and the pipes not installed, and finally connect the two pipes.
4. Do well in the hydraulic test of the pipeline to ensure the smooth flow of water
Since the object carried by the water supply and drainage pipeline is water, the water may have different water pressure for some reasons. Once the water pressure is too high and the pipeline cannot bear it, it is easy to cause accidents. Therefore, in order to avoid this phenomenon, relevant units must do a good job in hydraulic testing. At the same time, due to the different construction sites of water supply and drainage pipelines, their water pressure will also be different, so the relevant units can not measure a place and then use this standard for the construction of all engineering projects. In addition, during the construction of laying down the water supply and drainage pipes, it is also necessary to check whether there is garbage in the pipes. If there is garbage, it should be cleaned in time to avoid pipe blockage after the completion of the project, so as to ensure the smooth flow of water.
5. Trench backfilling
After the concealed work is completed and accepted, the trench can be backfilled. When backfilling the trench, it should be carried out symmetrically from both sides and ensure that the backfill materials meet the design requirements. If mechanical backfilling is used, it should be carried out manually within 0.6m of the pipe top and around the inspection shaft and other important parts. When backfilling, it is necessary to lay the trench beside the building or on the top of the drainage pipe. The backfilling should be compacted layer by layer. Bad soil should not be used for backfilling. For more information, please pay attention to the official website of Hainan Plastic Industry Co., Ltd.
