HomeTechnical ArticlesOptimization of Anti-Leakage Structure and Construction Efficiency for Prefabricated Manholes ——Rapid Construction Technology Based on GB/T 23483 Standard
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Optimization of Anti-Leakage Structure and Construction Efficiency for Prefabricated Manholes ——Rapid Construction Technology Based on GB/T 23483 Standard
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Post by by 孙飞虎
1. Research Background
Manholesare critical nodes in municipal pipe networks, responsible forpipe maintenance, water level monitoring, and stormwater collection. Traditional cast-in-place concrete manholes facethree major challenges(Figure 1):
Long construction 周期: 7-10 days per manhole, accounting for 35% of pipeline project time
High leakage rate: 42% of pipeline defects from joint leakage (2024 MOHURD data)
Poor durability: 65% crack incidence after 5 years
2. Core Issue: Failure Mechanism of Traditional Manholes
2.1 Failure Mode Analysis
Failure Type
Cause
Typical Scenario
Joint Leakage
Shrinkage cracks + seal failure
Stormwater-sewage intersections
Settlement
Uneven foundation + low stiffness
Soft soil or heavy traffic areas
Material Corrosion
Chemical erosion by sewage/groundwater
Industrial parks, coastal areas
2.2 Key Influencing Parameters
Parameter
GB Requirement
Traditional Process Deviation
Wall thickness (mm)
≥200
180-190
Joint seal compression (%)
15-25
8-12
Foundation bearing capacity (kPa)
≥100
60-80
3. Prefabrication Technology Optimization
3.1 Structural Design Innovation
Adopted"modular + tongue-and-groove"prefabrication (Figure 2), offering advantages over cast-in-place:
Modular production: Precision ±2mm for 井筒，base, and 支管 joints
Conclusion This paper solves manhole challenges throughprefabrication + anti-leakage technology + smart monitoring. As a professional supplier, we provide: ✅ Full range of prefabricated manhole modules (φ700-φ2000mm) ✅ Rapid construction toolkits ✅ Manhole health monitoring cloud platform
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