Protective railings must be installed around foundation pits whose excavation depth exceeds 2m.The protective railings should meet the following requirements: the height of the protective railings should not be lower than 1.2m; the protective railings should be composed of horizontal bars and vertical bars. There should be 2 to 3 horizontal bars, the height of the lower bar from the ground should be 0.3m~0.6m, and the height of the upper bar should be 1.2m~1.5m; the distance between the vertical bars should not be greater than 2.0m, and the distance between the vertical bars and the slope should be Greater than 0.5m; the protective railing should be hung with dense mesh and toe guards. The net should be closed from top to bottom; the height of the foot baffle should not be less than that, and the height of the lower edge of the foot baffle should not be greater than that; the protective railing should be installed firmly, and the material should have sufficient strength.
When the excavation depth of the foundation pit reaches 2m or more, protective railings must be installed around it. The height of the railing should not be lower than 1.2m, and the distance between the poles should not be greater than 2m. There are many kinds of foundation pit guardrails, and the more eye-catching red, white and black and yellow colors are generally used.
The height and facilities of the protective railings on the edge of the foundation pit:
1. The edge protection of the foundation pit is made of 30×square steel, the column is made of 50×square steel, and the base is firmly fixed to the ground with expansion bolts.
2. The height of the protective railing pole, the height of the railing, and each standard length, paint red and white or black and yellow warning paint and set a safety warning placard in the middle, and set a high red and white or black and yellow toe guard at the bottom.
3. Drainage measures for the foundation pit: set up drainage ditches outside the protective railings and adopt organized drainage.
4. Night warning lights are installed around the foundation pit.
5. The No. 13 reminder board can also be hung on the outside of the guardrail, and the No. 14 reminder board can be hung on the inside.
The protective effect of foundation pit border:
1. Make the construction site more tidy, beautiful, civilized and safe.
2. Prevent passing motor vehicles from getting too close to the edge of the foundation pit and causing landslides.
3. Prevent workers from accidentally falling into the foundation pit. Prevent sundries from falling into the foundation pit, thus causing injury to the workers in the foundation pit.
