What are the safety precautions for tunnel entry?

1. Pay enough attention to the safety of the hole, and carefully investigate the geological conditions of the cave from the owner, design, supervision and construction, and report to the project office, the director office and the design representative in a timely manner when the form of support does not match the geological conditions. The form of entering the hole should be supported by the advanced pipe shed. Formulate an effective hole entry plan, and enter the hole only with the approval of the project office and the superintendent's office.

2. The relevant approval and approval procedures should be completed for tunnel construction (sub-project commencement report, special plan for safe construction, safety education, safety technology disclosure and other construction inspection procedures).

3. The excavation of the side slope should avoid the rainy season, and the side slope excavation should be excavated step by step from top to bottom, and the excavation should be protected by a level, and the protection construction should not be carried out after digging to the end or overlapping excavation up and down. And set up a special person to observe the stability of the side slope to ensure that the side slope is safe and stable under the condition of construction.

4. Complete the construction of the interception ditch as soon as possible. The alignment of the interception ditch should be smooth, and the geometric dimensions of the masonry quality should meet the design requirements.

5. Do a good job in monitoring and measurement, arrange surface subsidence observation points (not less than 7 points and not less than two sections for each section) according to the design and specification requirements, and measure the frequency 2 times a day, and the daily measurement data should be reported to the on-site supervision. In case of any abnormal situation, the PMO, the Superintendent's Office and the design should be notified immediately.

6. The excavation method should adopt the distributed excavation method to retain the core soil method, try to use mechanical excavation and manual cooperation, and the need for blasting should use loose blasting to reduce the impact of vibration on the stability of the slope, strictly control the excavation footage, and the circulating footage should not be exceeded.

The above answer comes from asking me.

What are the precautions for driving into the tunnel? It's better to find out first, otherwise it's too late if something happens.

Pay attention to your driving lights and keep your distance from the car.

control the stability of the side slope;

Choose a reasonable construction method, and at the same time strengthen the temporary support.

At this stage, how do construction enterprises carry out tunnel excavation projects, and what are the precautions for tunnel excavation? What's the basics? The following is the relevant content of Zhongda Consulting's professional construction terminology for tunnel excavation precautions, and the basic situation is as follows:

Key considerations for quality control of tunnelling works.

1. Analyze quality control from the aspects of design concept and construction method.

The tunnels of this project are designed and constructed using the new Austrian method, which mainly uses the theory of rock mass mechanics, through the advanced radar geological forecasting, measurement and monitoring of the surrounding rock of the tunnel, adopts a new type of supporting structure, and tries to use the self-supporting capacity of the surrounding rock to guide the tunnel design and construction method. It is characterized by the timely application of a thin layer of flexible jet mixed concrete bolt support that is closely attached to the surrounding rock on the excavation face, and the application of advanced support (such as advanced anchor, grouting small conduit, pipe shed, etc.) when necessary, so as to control the deformation and stress release of the surrounding rock, so as to adjust the stress redistribution of the surrounding rock in the common deformation process of the support and the surrounding rock to achieve a new balance, in order to maximize the maintenance of the inherent strength of the surrounding rock and the use of its self-supporting capacity.

Second, the main precautions for tunnel construction safety:

1) The clear policy is "safety first."

1. Prevention first".

2) Establish a responsibility system for safe production, emphasizing that "safety must be managed in production".

3) At the same time as the preparation of the construction organization, technical measures for safe production should be formulated, safety operation rules should be formulated, and the construction personnel should be disclosed.

4) After passing the safety examination, you can take up your post.

5) Construction workers should be in good health, and regular physical examinations, and those who suffer from a certain disease shall not engage in relevant work.

6) The workplace should have qualified safety protection facilities, and on-site personnel should be equipped with labor protection supplies.

7) Temporary houses should be built above the perennial flood level, and safety precautions should be taken according to meteorological, hydrological, and other conditions.

1. All personnel who enter the cave must be registered on the spot by the person in charge of the shift in the duty room at the entrance of the cave, and the time, number of people, and reasons for entering and exiting the hole must be counted and recorded. 2. The construction machinery must be registered by the person on duty at the entrance of the cave before entering the hole. 3. All personnel entering the cave must wear safety protective equipment, and those who do not wear safety protective equipment have the right to prohibit them from entering the cave.

4. The personnel and vehicles entering the cave should obey the dispatch and command of the on-site management personnel, the personnel in the cave must walk on the side, the vehicle must drive at a speed limit and should pay attention to the on-site safety warning signs to ensure the safety of people and vehicles. 5. The personnel on duty at the entrance of the cave must wear armbands to perform tasks; The on-duty safety officer must check the registration of people entering and exiting the cave every day. 6. The transportation of detonators and explosives shall not enter and exit the hole in the same vehicle, and the blasting materials shall not enter the hole without the tracking and supervision of the blaster.

7. Non-blasting personnel are prohibited from entering the hole before firing, and they can only enter the hole after the alarm at the hole is lifted and the personnel on duty agree. 8. Those who are found to have not strictly implemented the registration system for entering and exiting the cave will be fined 100 yuan each time for violators; Those who find that the personnel on duty at the entrance of the cave are absent from their posts, or the registration management on duty is not in place, the personnel on duty will be fined 50 yuan each time.

What is the safety management system for tunnel construction entrance and exit tunnels? Please see the article of Zhongda Consulting.

1. All construction personnel who enter the cave must be registered on-site by the person in charge of the shift in the duty room at the entrance of the cave, clarify the number of people, time and place of construction, count the number of people when leaving the hole, and make a record. 2. The construction personnel must wear safety protective equipment, and those who do not wear safety protective equipment have the right to prevent the cave from entering the hole. 3. The construction personnel and vehicles should obey the command of the on-site management personnel, the personnel should walk simply, the vehicle should drive at the speed limit, and pay attention to the on-site safety warning signs to ensure safety.

4. The personnel on duty at the entrance of the cave must wear armbands to perform tasks, and the safety officer on duty shall supervise and inspect whether the registration of the personnel entering and exiting the entrance is true. 5. Where it is found that the registration of entering the hole is not strictly implemented, the operation team will be punished with 100 yuan each time. The entrance of the cave adheres to the 24-hour duty system, and if it is found that the personnel on duty at the entrance of the cave are absent from their posts or the management of duty registration is not in place, the personnel on duty will be fined 50 yuan each time.

6. The project manager department and the superior inspection found that the registration management system for tunnel entry and exit was not strictly implemented, and the operation team will be severely punished, and the tunnel operation team will be strictly implemented.

The above is collected and sorted out by Zhongda Consulting.