Two Types of Foundation Pit Air Dome Analysis

Providing differentiated solutions for different construction scales, site conditions and functional requirements

Flexible Mobile Type

Sliding Rail Air Rib Foundation Pit Air Dome

Core design based on "air rib support + rail movement", providing support through retractable air rib structure, achieving overall translation with ground rails, suitable for construction scenarios requiring dynamic coverage adjustment.

Core Advantages

Short construction period (15-20 days), on-site installation ready in 1 day
Flexible translation along rails, daily movement distance up to 30 meters
More cost-effective than traditional canopies

Applicable Scenarios

Narrow foundation pits (subway tunnels, utility tunnel pits)
Phased construction projects, urban core area construction sites

Fixed Coverage Type

Industrial Air-Supported Foundation Pit Air Dome

Core design based on "large-span air dome structure", forming enclosed space through membrane body and ground seal, achieving overall support through internal air pressure difference, suitable for construction scenarios requiring full enclosure and large space.

Core Advantages

Large coverage area (1000-5000 sqm), dust sealing rate >= 95%
Strong wind resistance (Grade 8-9), integrated ventilation and dust reduction system
Flame retardant membrane, meets fire safety standards

Applicable Scenarios

Large square foundation pits (commercial complexes, high-rise buildings)
Chemical/municipal projects with high sealing requirements

Core Parameter Comparison of Two Types

Comparison Dimension	Sliding Rail Air Rib Type	Industrial Air-Supported Type
Single Coverage Area	300-1500 sqm	1000-5000 sqm
Single Coverage Area	300-1500 sqm	1000-5000 sqm
Construction Period	15-20 Days	25-35 Days
Mobility	Rail Translation	Fixed
Sealing Dust Control Rate	≥90%	≥95%
Overall Cost Performance	More Advantageous	Relatively Advantageous

Precise Application Scenarios

Select suitable foundation pit air dome types according to project characteristics to improve construction efficiency

Urban Rail Transit Projects

Suitable for subway station construction in busy areas, can flexibly move along narrow foundation pits to meet phased construction requirements.

Large Commercial Complex Foundation Pits

One-time fully enclosed coverage, meeting multi-trade simultaneous operations with significant dust and noise reduction effects.

Municipal Pipeline Laying Projects

Gradually move and cover according to construction progress, no need for repeated setup, improving efficiency.

High-Density Urban Residential Construction

High-sealing design reduces construction noise, minimizing disturbance to residents.

Rail Air-Rib Foundation Pit Air Dome · Professional Analysis

Comprehensive understanding of technical highlights from core structure to core advantages

Air-Rib Support Structure

Adopts high-strength PVC coated membrane material to form arc-shaped tubes, internally pressurized to form "hollow self-stabilizing structure," no metal supports needed, snow load resistance up to 30cm thick, combining support and dust-proof functions.

Membrane life ≥10 years, tensile strength ≥3000N/5cm

Rail Movement System

Bottom integrated steel rail track with PLC control system, supports single/multi-module translation, daily movement distance up to 30 meters, accuracy ±5cm, adapting to phased construction and large-scale machinery operations.

Adapts to ≤3° ground slope, recyclable and reusable

Intelligent Control System

Real-time monitoring of air pressure, dust concentration, temperature and humidity, automatically adjusts pressure difference inside and outside membrane, warns with sound and light when abnormalities occur, supports remote control and unattended operation, daily power consumption only 5-8 kWh.

Data sampling frequency ≥1 time/minute

Environmental Benefits

"Double-layer membrane cloth + air interlayer" design, dust removal efficiency ≥90%, noise reduction effect significant, membrane material 100% recyclable, no construction waste, meeting green construction standards.

PM10 emission ≤0.5mg/m³

Efficient and Flexible Construction

Factory prefabrication (10-15 days) + on-site installation (1 day), total cycle ≤20 days; no internal supports, clearance height 3-5 meters, convenient for machinery scheduling, dismantling time ≤1 day.

Significantly improved efficiency compared to traditional shelters

Economic Cost Optimization

Membrane material cost is only 1/3 of steel, construction cost significantly reduced; materials reusable 3-5 times, operation and maintenance costs significantly reduced, overall cost more advantageous than traditional solutions.

Helps reduce daily indirect costs

Safe and Durable

Wind load resistance 6-7 levels, membrane material meets B1 level fire standards (self-extinguishing away from fire); intelligent monitoring system with real-time warning, track with limit device, avoiding inertial impact, ensuring all-weather safety.

Track life ≥15 years

Industrial Air-Supported Foundation Pit Air Dome · Professional Analysis

Comprehensive understanding of technical highlights from core structure to core advantages

Large-Span Membrane Structure

Adopts PVDF coated membrane material and special thermal welding process to form large-span enclosed space without beams and columns, achieving overall support through pressure difference inside and outside membrane (50-100Pa), span can reach over 50 meters.

Membrane thickness 0.8-1.2mm, light transmittance 10-15%

Sealed Anchoring System

Bottom adopts "U-shaped groove + waterstop" sealing structure, combined with ground anchor embedded parts (interval 1.5-2 meters), ensuring overall air tightness (air leakage rate ≤1%/24h), while resisting strong wind loads.

Anchoring strength ≥5kN/m, sealing level IP65

Environmental Control System

Integrated intelligent ventilation, dust filtration, temperature and humidity regulation functions, air exchange rate up to 6-8 times per hour, combined with dust sensors for automatic purification, maintaining internal environment up to standard.

Dust filtration efficiency ≥99%, energy consumption ≤0.3kW/㎡·year

High Sealing

Overall sealing design + special sealing materials, dust removal rate ≥95%, effectively controlling PM2.5, PM10 and other dust diffusion, especially suitable for chemical, municipal and other projects with strict environmental requirements.

Internal dust concentration can be controlled below 0.3mg/m³

气肋支撑结构

采用高强度PVC涂层膜材制成弧形管状，内部高压充气形成“中空自稳定结构”，无需金属支架，抗雪载达30cm厚，兼具支撑与防尘功能。

膜材寿命≥10年，抗拉强度≥3000N/5cm

轨道移动系统

底部集成钢轨轨道与PLC控制系统，支持单模块/多模块平移，单日移动距离可达30米，精度±5cm，适配分期施工与大型机械作业。

适应≤3°地面坡度，可回收复用

智能控制系统

实时监测气压、粉尘浓度、温湿度，自动调节膜内外气压差，异常时声光预警，支持远程操控与无人值守，日均耗电仅5-8度。

数据采样频率≥1次/分钟

环保效益

“双层膜布+空气夹层”设计，防尘效率≥90%，噪音降低效果明显，膜材可100%回收，施工无建筑垃圾，符合绿色施工标准。

PM10排放≤0.5mg/m³

施工高效灵活

工厂预制（10-15天）+现场安装（1天），整体周期≤20天；内部无支撑，净空3-5米，便于机械调度，拆除时间≤1天。

较传统罩棚效率有显著提升

经济成本优化

膜材成本仅为钢材1/3，建设成本降低明显；材料可复用3-5次，运维成本降低明显，综合成本较传统方案更具优势。

有助于降低日均间接成本

安全耐用

抗风载6-7级，膜材达B1级防火标准（离火自熄）；智能监测系统实时预警，轨道设限位装置，避免惯性冲击，保障全天候安全。

轨道寿命≥15年

工业气承式基坑气膜 · 专业解析

从核心结构到核心优势，全面了解技术亮点

Large-Span Membrane Structure

PVDF-coated membrane with special heat-sealing, beamless/columnless large-span enclosed space. Supported by 50-100Pa internal-external air pressure, span ≥50m.

Membrane thickness: 0.8-1.2mm, light transmittance: 10-15%

Sealing & Anchoring System

"U-groove + waterstop" seal, 1.5-2m spaced embedded ground anchors. Airtightness ≤1%/24h, wind load resistant.

Anchoring strength ≥5kN/m, sealing class IP65

Environmental Control System

Integrated intelligent ventilation, dust filtration and temperature/humidity control, 6-8 air changes/hour, automatic purification.

Dust filtration efficiency ≥99%, energy consumption ≤0.3kW/㎡·year

High Sealing Performance

Full sealing + specialized materials, dustproof rate ≥95%, controls PM2.5/PM10 diffusion, suitable for strict environmental projects.

Internal dust concentration ≤0.3mg/m³

Large Space Operation

Single membrane coverage area 1000-5000㎡, clearance height up to 8-15 meters, no internal supports, meeting simultaneous operation of multiple large-scale machinery (tower cranes, excavators), significantly improving space utilization.

Single membrane coverage area can reach 10000㎡

Environmental Adaptability

Wind load resistance 8-9 levels, snow load resistance 0.5kN/㎡ (approximately 50cm thick snow), membrane material resistant to high and low temperatures (-30℃ to 70℃), adaptable to coastal, high-cold and other complex climatic conditions.

Service life ≥15 years, annual maintenance cost ≤2%

Safety Compliance

Membrane material passes GB 8624-2012 B1 level fire certification, equipped with smoke alarm, emergency lighting, rapid escape channels, meeting national standards such as "Code for Fire Protection Design of Buildings".

Fire acceptance meets standards

Coacci Tech Strength Guarantee

Over 10 years of technological innovation development, technical strength and industry recognition certified by authoritative organizations

Company Overview

Established in 2014, formerly Coacci Tech, with registered capital of 50 million RMB, located in Advanced Manufacturing Development Zone, Weishi County, Kaifeng City, is a high-tech enterprise integrating R&D, manufacturing and sales of intelligent equipment, new materials, and cable-membrane structure products.

6 standardized production workshops have been built with total construction area over 55,000 square meters, equipped with professional membrane material splicing and cutting production lines, ensuring product quality and efficiency.

10+

Years of Industry Experience

50 Million

RMB Registered Capital

112 Mu

Owned Land

300+

Advanced Equipment

Introduced over 300 sets of automatic high-speed cutting machines, high-temperature thermal welding splicing machines and other equipment; laboratory equipped with PVC membrane cloth tensile tester, wind resistance tester, ensuring quality from production to testing.

Typical Case Practice

Demonstrating actual application value with a city rail transit project example

Rail Transit Noise and Dust Reduction Project in a Certain City

Adjacent to commercial area, located next to urban main road, construction faces strict environmental requirements

Project Background

Foundation pit is 59 meters long and 11 meters wide, with deepest point at 28.8 meters, located in urban core area, traditional construction difficult to meet dust and noise control standards.

Implementation Plan

Adopts three-part modular air membrane design, middle section 22.5 meters long, both side sections each 12.5 meters long, bottom installed with tracks, flexibly translating to adapt to construction needs.

90%+

Dust Removal Efficiency

Significantly Reduced

Noise Impact

1 Day

On-site Installation Time

Cost Optimized

Economic Performance

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Innovative Green Construction Solution - Foundation Pit Air Dome

Sliding Rail Air Rib Type - Industrial Air-Supported Type

Two Types of Foundation Pit Air Dome Analysis

Sliding Rail Air Rib Foundation Pit Air Dome

Core Advantages

Applicable Scenarios

Industrial Air-Supported Foundation Pit Air Dome

Core Advantages

Applicable Scenarios

Core Parameter Comparison of Two Types

Precise Application Scenarios

Urban Rail Transit Projects

Large Commercial Complex Foundation Pits

Municipal Pipeline Laying Projects

High-Density Urban Residential Construction

Rail Air-Rib Foundation Pit Air Dome · Professional Analysis

Air-Rib Support Structure

Rail Movement System

Intelligent Control System

Environmental Benefits

Efficient and Flexible Construction

Economic Cost Optimization

Safe and Durable

Industrial Air-Supported Foundation Pit Air Dome · Professional Analysis

Large-Span Membrane Structure

Sealed Anchoring System

Environmental Control System

High Sealing

气肋支撑结构

轨道移动系统

智能控制系统

环保效益

施工高效灵活

经济成本优化

安全耐用

工业气承式基坑气膜 · 专业解析

Large-Span Membrane Structure

Sealing & Anchoring System

Environmental Control System

High Sealing Performance

Large Space Operation

Environmental Adaptability

Safety Compliance

Coacci Tech Strength Guarantee

Company Overview

Typical Case Practice

Rail Transit Noise and Dust Reduction Project in a Certain City

Project Background

Implementation Plan

Product Q&A Product FAQs about Air-Supported Buildings, Air-Supported Gymnasiums and Industrial Air-Supported Structures

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