cart 0
Home Technical Articles Hydraulic Performance Optimization of Perforated Steel-Belt PE Composite Pipes for Drainage ——Cooperative Design of Infiltration and Drainage for Sponge City LID Facilities

Technical Articles

Hydraulic Performance Optimization of Perforated Steel-Belt PE Composite Pipes for Drainage ——Cooperative Design of Infiltration and Drainage for Sponge City LID Facilities

/ Post by by 孙飞虎

1. Research Background


Perforated steel-belt PE composite pipes, with a "steel reinforcement + HDPE matrix + regular perforations" structure (Figure 1), are core components for sponge city stormwater infiltration systems. Compared to ordinary PE perforated pipes, their ring stiffness increases by 50%, but engineering issues exist:


  • Perforation rate >25% causes 22% strength reduction (GB/T 19472.2 critical value)
  • 41% blockage rate after 3 years due to sediment (2024 MOHURD report)

2. Core Issue: Perforation Structure Conflict

2.1 Performance Parameter Conflicts


Parameter Infiltration Requirement Structural Requirement Traditional Design Conflict
Perforation rate (%) ≥20 ≤25 Performance inflection at 22-24%
Hole diameter (mm) 8-12 (for infiltration) ≤10 (anti-blockage) Common 10mm causes dilemma
Hole distribution Uniform Avoid steel reinforcement area Symmetric holes cause stress concentration

2.2 Blockage Mechanism


Through sediment infiltration tests (ISO 11733), blockage occurs in stages:
![Blockage Process Schematic](Figure 2)


  • Physical blockage (0-6 months): Particles >0.5mm mechanical interception
  • Biological blockage (6-24 months): Algae filter cake formation
  • Chemical blockage (>24 months): Calcium-magnesium crystallization

3. Perforation Structure Optimization

3.1 Multi-Objective Parameter Optimization


Using Taguchi method to optimize perforation rate (A), hole diameter (B), hole spacing (C):


Scheme Perforation Rate (%) Hole Diameter (mm) Hole Spacing (mm) Infiltration Coefficient (m/d) Ring Stiffness (kN/m²) Blockage Cycle (months)
A 20 8 50 12.5 12.8 18
B 22 9 40 15.2 11.5 24 (Optimal solution)
C 25 10 30 16.8 9.2 20


Optimization Breakthroughs:


  • Non-uniform holes: Increased spacing by 20% in stress areas
  • 9mm hole diameter: Balances infiltration and anti-blockage

3.2 Bionic Hole Design


Inspired by lotus leaf microstructure (Figure 3), added inverted cone 导流槽 at hole openings:


  • Infiltration efficiency +18%
  • Sediment passage rate +35%
  • Self-cleaning ability enhanced

4. Engineering Solutions

4.1 Sponge City Specific Standard


Based on GB/T 51345-2018, internal control indicators:


Parameter GB Requirement Optimized Standard Test Method
Average hole diameter (mm) 5-15 8-10 Image analysis
Water permeability (L/(m·s)) ≥0.1 0.15 Custom infiltration test
Anti-blockage cycle (months) - ≥24 Sediment circulation test

4.2 Anti-Blockage Construction


"Three-Layer Protection" installation:


  1. Filter layer: 200g/m² geotextile (O95=0.075mm)
  2. Drainage layer: 5-10mm gravel (porosity >40%)
  3. Monitoring layer: Flow sensors every 50m (30% blockage warning threshold)

5. Field Test Case: Sponge City Project


Index Traditional Pipe Optimized Pipe Standard Requirement
Annual infiltration (m³) 1200 1800 -
5-year blockage rate (%) 38 9 ≤15
Ring stiffness retention (%) 65 82 ≥60
Maintenance cost (¥/year·km) 12,000 4,500 -

6. Future Technologies

6.1 Smart Variable-Aperture Pipe


Using shape memory alloy to control hole size (Figure 4):


  • Expands to 12mm during storms
  • Maintains 9mm under normal conditions

6.2 Microbial-Induced Self-Healing


Inoculated Bacillus pasteurii forms calcium carbonate crystals on hole surfaces:


  • pH resistance expanded to 4-10
  • Crack self-healing rate 70%


Conclusion
This paper resolves performance conflicts through perforation optimization + anti-blockage technology + intelligent control. As a professional supplier, we provide:
✅ Custom perforation parameter design
✅ Sponge city infiltration system solutions
✅ Pipe health monitoring platform


Keywords: Perforated steel-belt PE composite pipe, hydraulic performance, anti-blockage, sponge city, LID facilities

Sample Block Quote

Nam tempus turpis at metus scelerisque placerat nulla deumantos sollicitudin delos felis. Pellentesque diam dolor an elementum et lobortis at mollis ut risus. Curabitur semper sagittis mino de condimentum.

Sample Paragraph Text

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi ut blandit risus. Donec mollis nec tellus et rutrum. Orci varius natoque de penatibus et magnis dis parturient montes, nascetur ridiculus mus. Ut consequat quam a purus faucibus scelerisque. Mauris ac dui ante. Pellentesque congue porttitor tempus. Donec sodales dapibus urna sed dictum.
Older Post
Newer Post
Compare Remove All
Products
Rating
Description
Availability
Product Type
SKU
Size
Color
Option
You have successfully subscribed!
 

is added to your shopping cart.