Slightly on the municipal drainage pipe project construction technology?

One is the excavation of pipe trench. Before excavating the trench, the excavation soil should be carefully analyzed to understand the soil differences, and then in the slope slope, should be fully considered and attention to its scientific rationality, safety and economy. In the excavation of pipe trench, should be strictly on the bottom elevation measurement control, and every digging a certain distance, pay special attention to avoid over-excavation, once over-excavation should be carefully backfill tamping, but also should be the bottom of the trough low-lying for strict control, to prevent the water into the water pooling, prohibited in the backfill tamping in the use of garbage soil, humus, silt and so on. Should give full consideration to set up support on the small part of the excavation surface due to the release of the line and restrictions.

The second is construction measurement. Construction measurement is always throughout the entire project, its technical requirements are very high, should be set up by specialists to ensure that the construction measurement can be completed in a timely and accurate manner. In order to ensure that the end of each process will not appear after the detection of errors, should be taken to self-check self-testing, and then also by professional surveyors to review. Third, the pipe base construction. The construction of the pipe base should be in the pipe seat, pipe trench excavation and acceptance. In the concrete pipe base construction, should be in accordance with the design drawings specification of the size, centerline and marking, etc. construction. If the construction schedule is urgent, it should also fully consider the unfavorable factors and carry out the marking to improve, so as to accelerate the strength change and carry out the lower pipe [1]. Fourth, install the pipe.

Excavation of the pipe trench should be carried out when the pipe preparation work, in the excavation of the pipe trench is about to end, the pipe should be transported into the site, and conscientious and responsible inspection of the pipe, strict quality control. Before the pipe is installed into the pipe trench, it should be in accordance with the requirements of the design drawings to the center line of the strip base, side line, well base and other dimensions and elevation check. Fifth, check the masonry well. Check masonry well center pile inspection should be in the masonry well excavation trench, and well base excavation should be based on the well base circle corresponding size, and in the elevation through the detection of errors with the strip base for the same, and then poured at the same time to complete the production. Should be in the pipe to put stable straight pipeline orifice, elevation is correct, and to meet the requirements of the design drawings for masonry well. The final water check to ensure that there will be no water, water leakage, backflow phenomenon.

2 water closure test, pipe trench backfill

One is water closure test. Water closure test, should be strictly in accordance with the test requirements of the pipe quality inspection, if the quality does not meet the standard should be used to repair fine mortar, water seepage should be used to fill the parts of the cement slurry brush. Second, pipe trench backfill. Pipe trench backfill should be carried out after the water closure test is qualified. Belly backfill that is in the pipe within the top 50 centimeters for backfill. Belly backfill should be carried out in strict accordance with the design requirements, and sieving, to ensure that the backfill will not have more than 10 centimeters of debris filled, and in the backfill, pay attention to whether there is water in the ditch, if there should be dealt with in a timely manner, and finally rigorously use humus, garbage soil and silt, etc. backfill.

3 municipal drainage project construction of common quality disease prevention measures

3.1 pipeline location shift, water accumulation

One is in the pre-construction handover pile retesting and protection should be strictly and carefully in accordance with the construction of the measurement specifications and procedures; according to the relevant provisions, and the hydrogeological conditions, the design requirements of the depth of the burial of the construction of the sample should also be strictly and carefully in accordance with the sample piles. Construction, and do a good job of the trench and the base of the axis and longitudinal slope measurement and acceptance. Secondly, if encountered in the construction of accidental avoidance of structures, should be in a suitable location for the addition of connecting wells, and in a straight line for connecting, and connecting wells should be more than 135 degrees of angle of rotation.

3.2 Pipeline leakage, water closure test does not meet the standard

First, the pipe selected by the pipeline must have the certificate of conformity and mechanical test report and other information provided by the quality department; the appearance of the pipe quality should be required for its surface flat, no loose, exposed bone and honeycomb pockmarked surface image, the quality of the found problems should be dealt with by taking effective measures to deal with the quality of the problem, and then for use[2]. Second, the quality of the standard should be selected. Secondly, the interface filler with standard quality should be selected, and then reasonable construction technology and test ratio should be adopted for construction, and finally construction should be carried out according to the corresponding construction operation requirements. Third, the construction should be carried out in accordance with the design specifications in a responsible manner, so as to ensure the strength and stability of the pipeline foundation, and when the geological and hydrological conditions of the foundation are unqualified, it should take measures of soil replacement and improvement, so as to improve the bearing capacity of the substrate. Fourth, strictly check the masonry well, ensure that the masonry well mortar full, no leakage hook joints; should be marked in advance in the leakage, and in the pipe water drainage after processing; for the numbness of the leakage should be painted with cement paste, such as is the case of serious should also be reworked to prevent leakage

3.3 backfill subsidence

First, should be backfilled with tamping equipment to carry out a Reasonable choice; should be targeted to select the appropriate type of backfill fill; and strict, reasonable control of the filler water content, to prevent backfill construction with water. Secondly, the other structures will not affect the settlement to take surface treatment, if it is caused by structural damage should be excavated and filled with better stability of the material, through compaction to fully supplement the damaged structures [3].

4 Conclusion

In summary, the discussion and analysis on the municipal drainage pipe project construction technology is of great significance. Not only can contribute to the quality of municipal drainage projects, lay the foundation, but also help to improve the economic efficiency and market competitiveness of municipal pipeline construction enterprises, more conducive to promoting the sustainable development of China's modern urban infrastructure.

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