Jintai's Ductile Iron Push On Pipe is a type of ductile iron pipe that can be laid without digging trenches. It is pushed forward by overcoming the friction of the soil through pushing force. When in use, a pipe body is often pushed into the soil, and then After pushing in the second pipe body and docking the second pipe body with the first pipe body, push in multiple pipe bodies in sequence to complete the ejection operation. The multiple pipe bodies are butted end to end to form the jacking operation.
Jintai Product Parameters
| Brand: |
Jintai-DI pipe |
| Product Name: |
Ductile Iron Push On Pipe |
| Nominal diameter: |
DN600-DN2600 |
| Production process: |
Centrifugal casting |
| Material: |
Ductile Iron GGG50 |
| Effective length: |
3m, 6m |
| Grade: |
Wall thickness graded pipe K Class: ≥K8 |
| |
Pressure classification pipe Class C: including C25, C30, C40 |
| Implementation standards: |
ISO 2531, BS EN545 BS EN598 |
| Internal anti-corrosion coating: |
Cement mortar lining |
| External anti-corrosion coating: |
Steel mesh plus concrete layer |
| Interface type: |
Slide-in flexible interface (Push-In Joint) |
| Scope of application: |
Municipal water supply, drainage, sewage treatment, industrial drainage, chemical industry, water transportation engineering and other fields |
T-shaped pipe jacking structure:
1. The main stress-bearing surfaces are: socket surface and flange end surface.
2. Interface form: Use slide-in interface connection.
3. Mainly divided into T-type interface and K2T-type interface.
The pipe diameter of T-type interface is: DN600mm~DN2600mm
The pipe diameter of K2T type interface is: DN1600mm~DN2600mm
4. The interface seal adopts special rubber sealing ring. Through such optimized design, the sealing performance and corrosion resistance of the pipeline are strongly guaranteed.
5. Withstand large thrust force: By setting up thrust flanges, reinforcing ribs and encapsulating reinforced concrete, the allowable thrust force of the pipeline is increased. For example, the allowable jacking force of K9 grade DN1200 ductile iron jacking pipe can reach 739 tons. Moreover, products with higher allowable thrust force can be manufactured by increasing the wall thickness of the tube without a large increase in cost.
6. Adaptable to curved pipe jacking construction: The interface of ductile iron pipe jacking allows a deflection angle of ≥1.5°, which makes it widely used in curved pipe jacking construction.
Ductile Iron Push On Pipe its installation and construction method
installation method:
1. Preparation before construction:
Technical preparation refers to the calculation of the total jacking force of the pipe jacking, the calculation of the soil pressure of the back wall, and the calculation of the stability of the foundation pit of the working well or receiving well before construction. And each special construction plan needs to be formulated.
2. Equipment and material configuration:
3. Equipped with special lifting equipment, pipe jacking machines, hydraulic stations, sliding material mixing systems, special spreaders, jacks, installation measuring tools, hardware tools, etc.
4. Construction environment verification: This refers to the on-site investigation that should be conducted before construction, and the geological conditions along the construction line, surrounding environment, above-ground and underground pipe networks, surrounding buildings and other facilities should be verified and confirmed, and pit exploration should be conducted when necessary.
5. Construction of pipe jacking: production of working wells. Working wells are generally rectangular, circular and polygonal. Compared with rectangular working wells, circular working wells have better stress and are mostly used in sections with deeper soil cover. Which ones are used in engineering practice? For various shapes of working wells, it is necessary to consider the design requirements, geological conditions and surrounding environment, adapt measures to local conditions, and make a comprehensive assessment.
6. Equipment installation: Lay guide rails. The slope of the rails must meet the design axis requirements. The height must be consistent with the center of the wall-penetrating pipe. The support angle corresponding to the center of the pipe must be 60 degrees and the tolerance requirements must meet national standards.
7. When making a mirror wall, it is necessary to ensure that the sealing and water-stopping seal requires that the center of the wall coincides with the center of the pipe.
8. Make a reaction wall. The reaction wall should be perpendicular to the axis of the pipeline, with an allowable non-verticality of 5mm/m.
9. Set up a jack system. The number of jacks should be an even number and parallel to the axis of the pipe. The center point of the resultant force is 1/10-1/8 of the outer diameter of the pipe below the center of the pipe. The jacks need to operate synchronously.
10. Set up the laser instrument, and the center positioning of the laser instrument meets the design requirements.
11. Jack the machine head into the pit for installation. After the machine head is hoisted into the well, install the electrical hydraulic system and pipelines. After it is in place, the machine head center data must be retested and calibrated.
12. Set up a sliding material injection system. The sliding material injection system is an important part of the jacking operation. With the grouting holes on the pipe body, the sliding material can be injected into the gap between the jacking pipe body and the tunnel dug by the machine head, which can effectively reduce the jacking force. The sliding material must be configured according to the proportion of thrust and the function of preventing the road surface from sinking above the pushing path.
13. Jacking into the hole, trial operation of the pipe jacking machine, checking the operating parameters of each equipment, lifting the push ring, breaking the mirror wall to ensure safe operation of personnel and preventing damage to the water-stop tape.
14. Adjust the mud discharge of the empty machine. Check the engine of the idle machine to see if the mud is even when it is first discharged. Check the pipeline to ensure it is smooth.
15. For pipe installation, adjust the push ring, hoist the pipe into the well and install the interface to ensure the quality of the pipe interface.
16. When the rear seat jack is jacked in, the oil gauge on the main jacking station must not exceed the converted maximum pressure value.
17. Inject sliding material and grouting simultaneously with jacking. Generally, when the pipeline length is more than 40m, sliding material must be injected to reduce drag. The sliding material forms seepage and slurry sleeves outside the pipeline, and the pipeline is wrapped by the sliding material suspension. Greatly reduces friction to ensure smooth jacking.
18. Measurement, correction, jacking control, measurement control points cannot be disturbed, and the measurement and correction grouting amount must be measured and recorded every 500mm.
19. During mud extraction and continuous jacking operations, the pipeline must be kept clear and the mud concentration or condition must be observed to see if it is normal.
20. Jacking force control, the jacking force shall not exceed 60% of the maximum jacking force. During construction, when the jacking force is close to 60% of the maximum jacking force, additional relay rooms must be considered. As the jacking length increases, the axial thrust of the pipeline will also increase. Gradually increases, when the thrust exceeds the bearing capacity of the pipe, the pipe will be damaged, leading to project failure. In order to use a smaller jacking force to push a longer distance pipeline, a common method is to divide the long-distance pipeline into multiple sections and push them in sections. , add a relay room between each adjacent section, and install a small jack in the relay room. The thrust generated by each top section is less than the maximum thrust that the pipeline can withstand, and the large jacking force is decomposed into multiple Small jacking
force can ensure the normal progress of pipe jacking construction.
Ductile Iron Push On Pipe Nodularization Level ≥3
Ductile Iron Push On Pipe Product Certificate Report
Audited Supplier 
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