Reinforced concrete pipe installation method and clamp ...

Reinforced Concrete Pipe Installation Method and Special Clamp

The invention pertains to the construction field, specifically to a method for installing reinforced concrete pipes using a special steel concrete pipeline fixture.

In the past, lifting reinforced concrete pipelines often involved using a punching or bundling method. The former risked damaging the concrete pipe mouth with wire ropes, leaving excessive gaps at pipe joints to facilitate wire rope removal. The latter, while solving the gap issue, tended to crush the wire rope beneath the pipeline, making it difficult to retrieve.

Traditional techniques frequently caused damage to the pipe mouths during wire rope hoisting, leading to issues like mortar flaking, cracking, inaccurate pipe joint fitting, and leaks, which resulted in erosion and depressions by water current inside the pipeline.

The new construction method offers clear advantages, particularly for projects with tight durations or high water seal requirements. It ensures easy application, fast completion, cost efficiency, and construction safety.

This method uses a concrete interface agent to enhance cohesion with the concrete surface, providing excellent water resistance, freeze-thaw durability, and avoiding plaster hollowing or flaking. It improves the overall sealing of reinforced concrete pipes, preventing issues like pipeline cavity road depressions due to leakage, ensuring safety, reducing maintenance costs, and offering significant social benefits.

Adopting mortar admixture with asbestos long wool fiber improves the mortar's strength, preventing drying, cracking, and water leakage at pipeline joints.

Using a concrete dabbing machine instead of manual chiseling enhances efficiency and effectiveness, ensuring better mortar application and bond with the pipeline.

The well-designed special lifting clamp based on extensive jig design documentation and engineering conditions provides low operational costs and significant benefits in municipal engineering construction.

Overhead block clamp for concrete contractor offers an essential tool for concrete contractors, ensuring efficient and safe pipeline installation.

Concrete Reinforced Pipe Installation Method

The invention's method comprises the following steps:

1. Pipe Lifting: Utilize a special steel concrete pipeline fixture with a crane to lower pipes into place, ensuring balance and proper joint alignment throughout the process.
2. Pipe Mouth Dabbing: Use a hand-held concrete dabbing machine for even application, replacing manual chiseling for better efficiency and effectiveness.
3. Belt Construction: Apply concrete interface agent uniformly to pipe joints before smearing band mortar mixed with asbestos long wool fiber and cement. The recommended ratio is asbestos long wool fiber: cement: yellow ground = 1:3:6.
4. Base Construction: Ensure proper base construction according to specified methods.
5. Closed-Water Test: Conduct a test before backfilling to verify leak-tightness and sealing.

Steel Concrete Pipeline Special Fixture

The special fixture includes two hinged handles with a lanyard hole at the upper end and an aduncate semicircular arc claw with an internal rubber fender at the lower end. The middle and bottom parts of the claw have auxiliary clamping plates parallel to the steel concrete pipeline, fixed with rubber fenders.

1. Surveying and Locating: Measure the plan position and elevation, ensuring proper construction control stakes and excavation.
2. Channel Excavation: Excavate according to geological and engineering data, controlling depth and ensuring proper width for pipe laying and installation.
3. Pipeline Foundation: Construct a proper foundation based on the site's geological conditions and design requirements.
4. Pipe Installation: Safely lift and install pipes, controlling elevation and alignment to meet specifications.
5. Pipe Mouth Dabbing: Use the concrete dabbing machine for effective and uniform pipe mouth dabbing.
6. Interface Agent Application: Apply a concrete interface agent for enhanced bonding and sealing.
7. Belt Mortar Application: Apply mortar mixed with asbestos long wool fiber, ensuring proper filling and sealing of joints.
8. Base Construction: Construct the base as per design specifications, ensuring stability and compaction.
9. Closed-Water Tests: Conduct thorough tests before backfilling to ensure no leaks and maintain pipeline integrity.
10. Trench Backfill: Backfill trenches while ensuring proper material selection, removal of foreign materials, and control of backfill layers.

The method has been successfully applied in several municipal engineering projects, demonstrating its effectiveness in solving common issues like pipe mouth damage, wire rope handling problems, and improving mortar bonding and sealing.

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