Research Areas and Research Achievements of Underground Engineering
Research Area 1 – Design theory and special structure of transportation tunnel engineering
1) Mined Tunnel: Based on the load characteristics of deep-buried tunnel, dynamic classification method of surrounding rock, and interaction mechanism of primary support, secondary lining and surrounding rock, a dynamic waterproof method and a novel waterproof structural system of tunnels were developed. Safe control method and reinforcement mechanism of tunnel defects were proposed, and damage and degradation mechanism and life cycle design of tunnel structural system were established.
2) Shield Tunnel: The coupling stress characteristics of shield tunnel structure in longitudinal and transverse direction, structure system of super large section underwater shield tunnel, instability mechanism of segment lining under weak resistance stratum, double-deck segment lining system, static and dynamic characteristics of complex soft-hard stratum structure, damage evolution mechanism of shield tunnel structure system.
3) Special Structure Tunnel: Large span composite support structural system, drainage segment lining structure of ultra-high water pressure, support structural system of tunnel with large deformation, intersecting tunnel support structural system.
Research on key parameters of segment lining structure Systematic design of shield tunnel
Research Area 2 – Transportation tunnel engineering construction, repair and maintenance technologies
1) Mined Tunnel: Countermeasure of rock burst and large deformation in high ground stress areas, damage evolution and instability mechanism of surrounding rock, construction mechanism based on characteristics of fluid-structure interaction during construction period, theory and technology of tunnel construction monitoring and safety assessment under complicated environment, rapid construction technology of tunnel with special and complex geology such as collapsible and expansive stratum and saline soil.
2) Shield Tunnel: Multi-body dynamic analysis of shield tunnel during construction period, disturbance mechanism of surrounding rock under shield tunnel construction, theory and technology of influences control of shield tunneling on surrounding environment, long-distance construction technology of underwater shield tunnel, interpretation and evaluation technology of risk sources in complicated urban environment.
3) Repair and Maintenance: Construction and health monitoring technology of tunnel, safety evaluation technology on operation of tunnel structure, identification technology of main causes of tunnel diseases, reinforcement and repair management mode of tunnel with diseases.
Construction mechanical behavior of metro overlapped tunnel Waterproofing and drainage technology of mined tunnel
Research Areas 3 – Dynamic characteristics and anti-seismic and vibration damping technology of transportation tunnel engineering
1) Anti-seismic and Vibration Damping: The seismic response characteristics and dynamic analysis method of rock tunnel and soft soil tunnel, vibration damping structural system of extra-long tunnel adjacent to or through active fracture zone, anti-seismic structural type of portal structure in high-intensity earthquake region, earthquake fortification standard and design method of tunnel trunk through unfavorable geology sections.
2) Vibration Induced by Trains:Frequency spectrum characteristics of train vibration load under different running speeds and train loads, dynamic analysis model and vibration effect of tunnel structure under vibration loads, mechanism of damage of tunnel structure caused by vehicles, damage evolution law and engineering control measure of damage.
3) Train Aerodynamics: Aerodynamics theory and key technology of noise and vibration reduction of high-speed railway tunnel, high-speed railway tunnel aerodynamic effect and aerodynamic safety of tunnel structure.
Seismic model test in high-intensity earthquake region Characteristics of micro-pressure waves at tunnel portals of high-speed railways
Mechanical property of tunnel excavation and blasting under complicated environment
Relevant achievements won 1 Special Award of the State Science and Technology Advancement Award (2008) and 1 second prize of the State Science and Technology Advancement Award.
Research Area 4 – Disaster prevention and energy conservation control technology of transportation tunnel ventilation
1) Operation Ventilation: The theory of ventilation network and ventilation type of long and large tunnels or tunnel groups, law of airflow movement in operational tunnel with shaft, cross adit and special structure, distribution and change law of thermal and moisture environment and pollutants in tunnels, operation ventilation solutions and control method of ultra-long tunnels.
2) Disaster Relief:The traffic incident classification methods and countermeasures of all kinds of highway tunnels or tunnel groups, fire prevention, disaster prediction and warning method of long and large tunnels or tunnel groups, dispersion characteristics of smoke and gas during fire outbreak in ultra-long tunnels, fire emergency evacuation and rescue plan, integral disaster prevention and rescue system and control strategy of highway tunnel groups and sections.
3) Energy Conservation: Feedforward intelligent ventilation control system of long and large tunnels and tunnel groups, intelligent lighting control system, integral coordinated control process and method of highway tunnel groups and sections, linkage of highway tunnels or tunnel groups and monitoring software platform through internet.
Semi-transverse ventilation of parallel adit and longitudinal and sectional ventilation technology
Feedforward intelligent ventilation control system of highway tunnels
Operation ventilation and disaster relief system of super-long highway tunnels
Relevant achievements won 1 first prize of the State Science and Technology Advancement Award (2010) and 1 second prize of the State Science and Technology Advancement Award (2014).
