What are the advantages of foundation pit edge protection net?

1 Protective railings should be installed along the edges of foundation pit construction in accordance with regulations; when the excavation depth of the foundation pit exceeds 2.0m, a dense safety net must be installed on top of the railing protection. 2 The protective railing should consist of upper and lower horizontal bars and railing posts. Generally, the height of the upper pole from the ground is 1.0~1.2m; the height of the lower pole from the ground is 0.5~0.6m; the distance between poles should not be greater than 2.0m. 3. The distance between the railing posts and the edge of the foundation pit should not be less than 0.5m. Steel pipes can be directly driven into the ground to a depth of 0.5~0.7m. When sheet piles are used around the foundation pit or there is a reinforced concrete crown beam (topping) at the top, the steel pipe of the railing column can be driven outside the sheet pile or crown beam (topping). 4. The overall structure and strength of the fixation of the railing posts and their connection to the upper and lower crossbars should withstand an external force of 1000N. If there is a possibility of collision with vehicles or objects, the crossbar sections should be enlarged or the spacing and embedding of the railing posts should be enlarged. Depth and other measures. 5 "Safety Management Measures for Partial Projects with Greater Danger" Jianzhi (2009) No. 87 stipulates that foundation pits (troughs with excavation depths exceeding 3m (inclusive) that do not exceed 3m but with complex geological conditions and surrounding environment) ) Support and dewatering projects belong to the scope of sub-projects with greater risks. Earth excavation, support and dewatering projects for foundation pits (troughs) with an excavation depth exceeding 5m (including 5m). It belongs to the scope of sub-projects that are more dangerous than a certain scale. The construction unit shall prepare a special plan before the construction of the more dangerous sub-projects; for the more dangerous sub-projects exceeding a certain scale, the construction unit shall organize the demonstration of the special plan. According to regulations, a foundation pit with an excavation depth of ≧5M is a deep foundation pit. According to the requirements of Construction Quality 200987, earthwork excavation, support and dewatering projects for foundation pits (troughs) with an excavation depth exceeding 5m (including 5m). ...... The construction unit should prepare a deep foundation pit construction plan, which can only be implemented after the supervisor signs the opinion and passes the argument. The construction plan mainly includes calculations and design drawings for slope stabilization and slope protection, drainage ditches and water collection wells around the bottom of the pit, hardening of the slope top and water interception ditches, closed protective railings around the pit entrance, and no heavy objects such as soil or heavy vehicles driving around the pit entrance. etc. content. ?