Special Plan with Greater Risk

The construction organization design and dangerous special plan for the implementation of the project must be approved in strict accordance with the procedures, and the project manager must organize the project review and ensure its feasibility. The chief engineer of a company with a relatively risky special plan that exceeds a certain scale must organize a joint review.

Technical Information

All technical data must be formed by the corresponding responsible person, and outsourcing is strictly prohibited.

Formwork System

1. The formwork system must have implementable and effective construction drawings.

2. The supporting system of the post-pouring belt must be set up separately, and it is strictly prohibited to return to the top after removal.

3. All side beam support systems must be connected to the inner frame as an organic whole, and it is strictly forbidden to support it on the outer frame.

4. The step distance is strictly prohibited to exceed 1.5 meters, and the top of the column at the bottom of the Jack should be provided with ledger along the vertical and horizontal directions.

5. Except for the specially designed template system, the distance between the drawing screws must be less than or equal to 500mm under any circumstances.

Outer Frame System

1. The external frame system must have implementable and effective construction drawings.

2. The horizontal sealing of the outer frame must meet the following requirements: the working layer and the next layer of the working layer, the first layer of the cantilevered frame (climbing frame), the second layer of the floor frame, the middle layer is no more than 10 meters and no more than three floors must be full Closed.

3. The cantilever beam of the cantilever frame must be made of national standard I-steel no less than No. 16, the diameter of the oblique wire rope is no less than 14, and the height of each cantilever should not exceed 20 meters.

4. The guide rail or guide rod of the overall lifting frame must have three reliable wall points.

Electricity System

1. The leakage action current of the leakage protector of the main distribution box is 150mA, and the action time is 0.2s; the leakage action current of the switch box is 15mA or 30mA, and the action time is 0.1s.

2. The electric welding machine must be equipped with a secondary depressurization protector (including electroslag pressure welding machine).

High-risk Equipment (Tower crane, Cargo elevator, Material hoist, etc.)

1. The construction plan must be prepared by the construction party, and the chief engineer of the construction party must submit it to the general contractor for approval after examination and approval. 2. The procedures of the leaser must be complete and effective; the installation, jacking, and demolition construction personnel must have a combination of personnel and certificates.

Reinforcing Bar Project

1.Cement mortar pads or plastic pads must be used (except for specially made pads under special circumstances).

2. Rebar connection must be effectively managed according to a special process and ensure that it meets the requirements of the specification.

Concrete Works

1. The haircut treatment of construction joints must be carried out after the concrete is finally set and cleaned up before entering the next process.

2. Floor concrete must be vibrated with a flat plate vibrator; there must be at least 7 days of effective curing time for vertical members after demoulding.

3. Samples must be taken on site to make test blocks, and be maintained and inspected in accordance with the specifications.

4. There must be a special and effective repair plan for concrete defects, and the plan must be carefully implemented in strict accordance with the plan.

Prohibited Infrastructure Red Lines

Special Plan with Greater Risk

1. The project implementation construction organization design and the risky special plan must be approved strictly in accordance with the procedures, and the project manager must organize the project review to ensure its operability.

2. The chief engineer of the company must organize a joint review for the risky special plan that exceeds a certain scale.

Bridge Engineering

1. For digging piles, the wall must be protected and the wellhead must be equipped with a concrete lock 30cm above the ground. Double safety ropes must be used for personnel to go up and down.

2. The pier body template system must have design and processing drawings and calculation instructions.

3. The cast-in-place beam construction support system must have special design calculations, and the support must be pre-compressed after the erection is completed.

4. When the bridge is prestressed, the concrete strength must meet the design requirements before it can be stretched or untensioned. During the tensioning and grouting process, the whole process must be supervised by the side station.

5. Girder transport and erection construction: The bridge erector must be checked and accepted by the local safety supervision department before it can be used. A load-bearing running test must be done before the beam is erected.

Tunnel Engineering

1. Tunnel excavation must be excavated in accordance with the design requirements, and the excavation method shall not be changed without approval. When the level of surrounding rock changes, it is necessary to communicate with the design and supervision in time, make on-site appraisal, and confirm the change opinions before changing the construction method.

2. The safety step of the initial support, invert and secondary lining construction of the tunnel shall strictly comply with the industry code or the requirements of the local competent authority.

3. The over-excavated part of the tunnel must be backfilled tightly, no cavities are allowed behind, and wood boards and asbestos tiles are not allowed to be filled behind the shotcrete.

Concrete Works

1. All construction joints, wet joints, post-pouring belts and beam end chiseling treatment must meet the design requirements and be rinsed.

2. After all the concrete is unloaded, it must be closed several times to ensure that there are no cracks on the surface, and the effective curing period is not less than 7 days.

3. When digging piles for pouring concrete (dry irrigation method), string cylinders must be used. The bottom surface of the string cylinders is less than 1 meter from the concrete surface, and the concrete should be layered

Reinforcing Bar Project

1. Cement mortar pads or plastic pads must be used for reinforcing steel pads.

2. Reinforcing connection must be managed in accordance with a special process to ensure that it meets the requirements of the specification.

Electricity System

1. TN-S connection zero protection system must be adopted.

2. Adopt three-level power distribution and two-level leakage protection system.

3. The action current of the leakage protector of the distribution box is 150mA, and the action time is 0.2s; the action current of the leakage protector of the switch box is 15mA or

Initiating Device Custody

The pyrotechnics warehouse must be guarded by more than two employees with legal labor relations 24 hours a day, and they must be trained and certified to work. In the process of receiving, distributing, and recycling, you must register and sign. The remaining pyrotechnic products on site must be kept in the warehouse. It is strictly forbidden to stay overnight on site.