Tunnel boring machines (TBM/shield machines) are the core equipment of modern underground engineering. They are mainly used in highway tunnels, subway tunnels, water conservancy facilities, municipal engineering and other scenarios. They have the following characteristics:
1. Classification
① Open boring machines: suitable for stable rock formations, cutting through the full section of the cutterhead.
② Shield machines: suitable for soft rock or loose formations, equipped with a tubular shield structure, and have support functions.
2. Core technologies
① The cutterhead rotates to break the rock, the propulsion mechanism, and the top beam support system work together.
② Some models use "thermal nuclear excavation" technology to improve efficiency through rock vitrification.
3. Application scenarios
Railway/highway tunnels, power transmission tunnels, mine tunnels, etc.
Lanhi LDJ400 Series TBM
(I) Equipment Features
1. Non-explosive excavation technology
High-frequency breaker is used to impact rock (hardness below 40MPa) combined with bucket teeth/drill rod excavation to avoid vibration damage to the surrounding environment caused by traditional blasting.
2. Intelligent control
Local control + wireless remote control operation, equipped with digital twin and real-time monitoring system to realize visualization of construction parameters.
3. Efficient adaptability
① Adaptable section: 6~9.5m tunnel, can handle soft soil, hard rock (optional breaker) and other geological conditions.
② Excavation efficiency: 0~50m³/h, reducing the risk of over-excavation and landslide.
(II) Core technology highlights
1. Modular design
Integrates high-frequency rock breaking, soft soil fast excavation, and dust removal functions, and supports rapid replacement of working parts.
2. Safety and environmental protection
Suitable for sensitive areas such as residential areas and ecological protection areas, equipped with a spray dust reduction system.
3. Economic advantages
Diesel-electric dual power system, energy-saving and environmentally friendly in electric motor mode.
(III) Application cases
1. Boli Tunnel in Shanxi: LDJ400 achieved non-explosive excavation and verification of the reliability of hard rock construction.
2. Zijinshan Tunnel of Hunan Lingdao Expressway: The average daily excavation efficiency increased by 30% under complex geological conditions.
3. Wangjiakeng Tunnel of Xiyu High-speed Railway: Coordinated with precast concrete lining technology to shorten the construction period.
2. Industry trends
① Automation upgrade: gradually integrate robot installation and AI geological prediction functions.
② Green construction: Use electric drive instead of diesel engines to reduce carbon emissions by 40%.