Views: 0 Author: Site Editor Publish Time: 2025-09-22 Origin: Site
In the urban infrastructure system, manhole covers, though classified as "micro-components", are directly linked to people's livelihood safety and governance efficiency. Traditional manhole covers generally suffer from pain points such as insufficient anti-slip performance leading to pedestrian falls, easily worn information markers, and lack of positioning making management difficult. However, SMC (Sheet Molding Compound) manhole covers, through the in-depth integration of material properties and functional design, have achieved breakthroughs in four core dimensions: "high-strength load-bearing", "anti-aging and long service life", "adaptation to new scenarios", and "digital management". They provide a solution for modern urban governance that integrates safety, durability, and intelligence.
Detailed Table of Core Characteristics of SMC Manhole Covers：
Characteristic Category | Key Technologies/Parameters | Core Advantages | Typical Cases & Data | Case Source |
High-Strength Load-Bearing | 1. Raw materials: Unsaturated polyester resin + glass fiber 2. Molding process: High-temperature (150-180℃) and high-pressure (5-10MPa) compression molding 3. Load-bearing standard: EN124 (Class C250: 250kN; Class D400: 400kN) | Resistant to rolling and impact, no brittle fracture; suitable for heavy-duty scenarios | Underground utility corridors: Withstands dual pressures from earthwork and ground, anti-settling | Xiamen Municipal Garden Bureau, 2025 Municipal Facility Maintenance White Paper |
Anti-Aging & Long Service Life | 1. Material: UV-resistant modified resin + acid-alkali resistant glass fiber 2. Structure: No splicing gaps (achieved via high-temperature compression molding) | Resistant to salt spray and freeze-thaw; reduces replacement costs | Coastal areas of Xiamen/Qingdao: No rust for 10 years, 85% gloss retention, and only 12% mechanical performance degradation | Xiamen Municipal Garden Bureau, 2025 Municipal Facility Maintenance White Paper |
Adapted Scenario Type | Core Advantages | Specific Application Methods | Cases/Effect Data |
Intelligent Manhole Cover Scenario | 1. Intelligent modules protected by structural strength 2. Insulation to prevent electromagnetic interference 3. Service life matching with modules | Built-in positioning and communication modules for real-time monitoring of abnormal opening/tilting | Handan Power Supply Company: 522 sets of intelligent manhole covers, enabling rapid emergency repair response and a reduction in cable failures |
Green Municipal Scenario | Reduced energy consumption during production; lightweight | Replaces traditional cast iron manhole covers to cut energy use | |
Customized Scenario | 1. One-piece molding via compression molding process 2. Modular production (short cycle, low cost) 3. Customizable surface patterns | 1. Sponge cities: Permeable grid structure 2. Cultural and tourism blocks: Historical/regional cultural patterns 3. Underground utility corridors: Rectangular/arc-shaped special-shaped manhole covers | Cultural and tourism blocks: Patterns that do not fade for years; Underground utility corridors: Customization cycle shorter than traditional manhole covers |
Table of Digital Management Functions and Cases:
Management Function | Technical Support | Efficiency Improvement | Typical Case |
QR Code "One Cover, One Code" | Installation of intelligent IoT sensing devices for manhole covers | 1. Problem handling: Reduced time 2. Increased detection rate 3. Scan response: ≤3 seconds (no fading for 3 years) | Chongqing Dazu District: Electronic records for 43,000 manhole covers (Chongqing Municipal People's Government Website) |
IoT Precise Positioning | Lightweight adaptation to GPS/4G/5G modules with signal gain | 1. Increased defect handling rate 2. Reduced emergency repair response time | Laiyang Comprehensive Administrative Law Enforcement Bureau: "Three Platforms" Facilitate Refined Urban Management |
From pedestrian safety protection to intelligent supervision, from green low-carbon initiatives to cost optimization, SMC manhole covers have redefined the safety standards for urban infrastructure through innovations in four dimensions: "strength, service life, scenario adaptation, and digitalization". They not only address the livelihood pain points of traditional manhole covers but also, with the composite advantages of "durability + intelligence + environmental friendliness", have become an important indicator of the refinement level of urban governance. Every SMC manhole cover is evolving into a "smart node" that safeguards people's livelihood safety and connects the digital city.
