隧道防水减震隔热一体化关键技术研究OA

The construction of transportation tunnels in the western region of China faces the most complex engineering geological conditions globally.Influenced by factors such as high-intensity seismic zones,water-rich environments,and high-low temperature zones,tunnel damages due to earthquakes,water-related issues,and thermal stresses are prominent.There is an urgent need for research on integrated technologies that address seismic reduction,waterproofing,and thermal insulation in tunnels.Therefore,a systematic study was conducted on the safety and maintenance of transportation tunnels considering multiple disaster-causing factors.Initially,research was carried out on tunnel waterproofing,seepage prevention,seismic reduction,isolation,and thermal insulation techniques based on the development of a new type of resilient non-aqueous reactive polymer material.This involved impermeability tests,conducting seismic reduction tests,thermal conductivity coefficient measure-ments,and simulation analyses to demonstrate the effectiveness of the new polymer material in terms of waterproofing,seismic reduction,and thermal insulation.Our research shows that the impermeability level of 0.6g/cm3 polymer material reaches level 10,and it has good waterproof performance;The tunnel deformation under the action of 36%Seismic wave can be reduced by using the composite lining structure with polymer isolation layer;At lower temperatures,the thermal conductivity of polymers increases with increasing density.For every 1 g/cm3 increase in density,the thermal conductivity increases by 0.170 9 W/(m·K).At higher temperatures,the thermal conductivity of polymers first increases and then decreases with increasing density.Furthermore,a composite lining support system for tunnels,consisting of"surrounding rock-initial lining-high polymer-second lining,"was proposed.Finally,physical model tests for the construction of high-polymer seismic reduction,waterproofing,and thermal insulation layers in tunnels were conducted,along with integrated technological demonstrations,providing the optimal spraying process parameters,achieving the integrated application of tunnel waterproofing,seismic reduction,and thermal insulation.The research findings can serve as a reference and provide insights for the safe design and construction of transportation tunnels in high-intensity seismic zones,water-rich environments,and high-low temperature zones.