The safety of tunnel engineering under poor geological conditions has always been the focus of attention in the engineering community. Especially in special rock sections, tunnel construction is facing more severe challenges. In order to ensure the safety of tunnel construction, it is necessary to have an in-depth understanding of the adverse geological conditions and special rock and soil sections, and take appropriate safety measures.
1. The influence of poor geological conditions on tunnel construction.
Poor geological conditions include weak foundations, collapsible loess, expansive soil, permafrost, fault fracture zones, etc. These geological conditions will adversely affect tunnel construction, which may lead to problems such as instability, deformation, and leakage of the tunnel structure.
2. Characteristics of special rock and soil sections.
Special rock and soil sections mainly include karst, landslides, debris flows, etc. The geological conditions of these sections are complex and the stability is poor, which brings great risks to the tunnel construction.
3. Safety precautions for the special rock and soil section of the poor geological conditions of the tunnel project.
1.Do a good job in geological survey.
Before construction, it is necessary to conduct a detailed survey of the geological conditions around the tunnel to understand the distribution of poor geological conditions and special rock and soil sections, so as to provide a basis for formulating a reasonable construction plan.
2.Strengthen support measures.
In poor geological conditions and special rock and soil sections, support measures should be strengthened to ensure the stability of the tunnel structure. Reinforced concrete support, steel arch support, bolt support and other measures can be used to improve the bearing capacity of the tunnel.
3.Control the construction schedule.
In poor geological conditions and special rock and soil sections, it is necessary to control the construction progress and avoid geological instability caused by excessive excavation. It is necessary to arrange the construction sequence reasonably to ensure the safety in the construction process.
4.Strengthen monitoring and early warning.
In the construction process, it is necessary to strengthen monitoring and early warning, and discover and deal with potential safety hazards in a timely manner. Geological radar, advanced drilling and other means can be used to detect the geological conditions ahead, providing a scientific basis for construction.
5.Make an emergency plan.
In view of possible emergencies, it is necessary to formulate a sound emergency plan to ensure that effective measures can be taken quickly in an emergency situation to ensure the safety of personnel and property.
Fourth, strengthen technical and management measures.
1.Improve the quality of construction personnel.
It is necessary to strengthen the technical training and safety education of construction personnel, improve the quality and skill level of construction personnel, and ensure that the safety operation procedures can be strictly observed during the construction process.
2.Strengthen device management.
It is necessary to strengthen the maintenance and management of construction equipment to ensure that the equipment is in good working condition. At the same time, it is necessary to strengthen the inspection and detection of equipment, find and deal with equipment failures in a timely manner, and avoid the occurrence of safety accidents caused by equipment problems.
3.Strengthen security management.
It is necessary to strengthen the safety management of the construction site, establish a sound safety management system and responsibility system, and clarify the responsibilities and authority of management personnel and construction personnel at all levels. It is necessary to strengthen the supervision and inspection of the construction site, discover and deal with potential safety hazards in a timely manner, and ensure safety in the construction process.
5. Summary. The safety of tunnelling under poor geological conditions is a complex and important issue. In order to ensure the safety of tunnel construction, it is necessary to have an in-depth understanding of the adverse geological conditions and special rock and soil sections, and take appropriate safety measures. At the same time, it is necessary to strengthen technical and management measures, improve the quality and skill level of construction personnel, strengthen equipment management and safety management, and ensure safety in the construction process. Only in this way can we provide a strong guarantee for the safe construction of tunnel engineering.