Corrugated Pipe Culvert manufacturer

In terms of engineering cost, a steel corrugated pipe culvert with a diameter of 1.5m costs around 6000 yuan per linear meter, while a reinforced concrete box culvert with a diameter of 1-4m costs between 6000 and 8000 yuan per linear meter due to differences in clearance. During the construction process, when both types of pipes are increased by 20cm in outer diameter, the amount of earthwork used for the former is reduced by about 8-10 compared to the latter. In terms of economic comparison, the cost of the former is lower than that of the latter.

Due to the confidentiality of the project engineering unit price, the following unit price is not the unit price of the 4m diameter steel corrugated pipe culvert in this project, but the data provided by the pipe segment manufacturer for other projects slightly earlier than the Dengru project, with slightly smaller specifications of steel corrugated pipe culverts, to compare the comprehensive cost of the two pipe types.

The comprehensive cost comparison of two types of pipes shows that when the pipe diameter is 2.0m, the total cost of corrugated pipes is 10063 yuan/m -, and the total cost of reinforced concrete pipes is 7400 yuan/m, with a ratio of 1.36; When the diameter of the pipe is 2.5m, the total cost of the corrugated pipe is 14271 yuan/m, and the total cost of the reinforced concrete pipe is 9400 yuan/m, with a ratio of 1.52; When the diameter of the pipe is 3.0m, the total cost of the corrugated pipe is 16741 yuan/m, and the total cost of the reinforced concrete pipe is 12300 yuan/m, with a ratio of 1.37; When the diameter of the pipe is 3.5m, the total cost of the corrugated pipe is 21621 yuan/m, and the total cost of the reinforced concrete pipe is 15000 yuan/m, with a ratio of 1.44; From the above data, it can be seen that the material cost of steel corrugated pipes is about 40% higher than that of concrete pipes; However, due to its significantly shorter construction period, the number of daily laborers used by the construction collaboration team is much less than that of traditional mortar rubble culverts and concrete culverts.

As we know , the labor cost much on the total cost, In today's increasingly high unit price of labor, its advantages in saving labor costs are becoming greater and greater. Currently, its social and economic benefits far exceed the amount of the overall project cost. In addition, the subsequent maintenance costs are lower and the service life is longer. In the long run, it is more economical. At present, China's steel corrugated pipe industry is constantly adjusting, the market is becoming increasingly standardized, and the cost investment is gradually decreasing, which has enabled steel corrugated pipes to obtain better economic benefits and a wider market development space.

To control the quality of steel corrugated pipe culvert during construction, bellow methods can be used:

Foundation excavation. The excavation depth should be three times the diameter of the pipe culvert. If the site space is small, a construction space of 3m should be ensured. This not only helps with the assembly of pipe sections, but also facilitates the backfilling and compaction of the assembled abutment in the future. It should be ensured that the bearing capacity of the culvert foundation is uniform, especially at the intersection of soil with different bearing capacities. If the culvert cannot be moved, graded sand and gravel compaction can be used for soft foundation. In rock foundation, excessive rigidity may cause damage to the flexibility of the culvert, exacerbating the deformation of the pipe section. For this, graded crushed stone can be replaced after the excavation of the foundation, with an ideal thickness of 100cm; The height of the fill soil on the culvert roof should not be less than 50cm, and a roller with a weight of not less than 12t should be used for rolling to ensure smooth passage of machinery; When the filling height is within 50cm, manual compaction with a small impact compactor shall be used for compaction, and compaction shall be not allowed.

2) Assembly stage. The pre tightening torque of all bolts is 340N · m ± 70N · m, and the diameter error after assembly cannot exceed ± 1% of the design value; During the assembly process of corrugated boards, there should be no debris at the joints of the pipe segments to avoid leaving gaps after splicing, because the gaps may adversely affect the waterproof effect of the pipe body, and it is important for steel corrugated pipe culvert waterproof effect, so gaps should be avoided

3)Consolidate the foundation layer. First we need to check and Clarify whether the compactness between the bottom of the pipe segment and the foundation meets the standard, then we assemble the corrugated pipe culvert; In order to avoid possible erosion caused by rainfall, floods, etc. on this culvert, M30 cement mortar can be used for plastering within a height of about 2 meters at the bottom of the pipe, requiring a smooth and even surface; Layered compaction should be used in foundation backfilling, with graded crushed stone as the main material. The maximum particle size should not exceed 5cm, and the number of particles with a particle size of less than 0.074mm should be less than 3%. The mud content should also not exceed the specification requirements.

4) Corrugated pipe culvert Bolt assembly. Using the loose bolt assembly method to do the bolt assembly work, the torque of each nut is strictly controlled according to technical specifications. When using a motorized wrench, the plate tightening time should be between 2s and 5s. For areas where the galvanized protective layer is damaged, rust inhibitor should be applied immediately; In order to reduce the secondary stress caused by temperature factors on corrugated pipes, bolt tightening should be carried out at an appropriate temperature, with the optimal temperature being 13-22 ℃.

Economic And Technical Analysis includes to ensure the quality of excavation, foundation construction, pipe joint connection, backfilling, and other construction processes.