The foundation of high pole lamp above 0 meters is often designed and earthed according to the pile foundation. The method is safe and reliable, but the cost is relatively high. Based on the principle of economy, rationality, safety and durability, this paper points out the key links and precautions in the foundation design in combination with national specifications and construction practices, and proposes an optimized, economic and safe design scheme of high pole lamp foundation in combination with examples.

Key words: 35m high pole lamp foundation tamping machine tamping stability

In the construction of the project, the port has a large area of grain freight yard, ore freight yard and container freight yard, which are equipped with high pole lights according to the size of the area because of the need for lighting at night. High pole lamps are generally finalized products produced by professional manufacturers, and the manufacturers are responsible for installation and commissioning. According to the foundation construction drawings provided by the manufacturers, pile foundations are used. Inspired by the experience of using rammers to build various types of freight yards in this region, whether it is possible to dig the bottom of the foundation deeply without using pile foundations and then use rammers to tamp it

Load Factor Table 2

No. Description of load wind load

1 1.0

2 1.0 1.0 Calculated wind pressure 0.25KN/m2

3 0 1.2 Calculated wind pressure 0.8~1.2KN/m2

For concrete pouring, we have made a detailed calculation to ensure its safety. The effect after the actual construction can prove that this method is safe, economic and reasonable.

1. Analysis of the load on the lamp foundation Generally, the load on the lamp foundation is not only the dead weight of the lamp body, but also some other loads, which can be divided into three categories according to their action types:

1.1 Basic load, including dead weight of lamp body, lamp weight and cable weight;

1.2 Additional load, including wind load under normal conditions (0.25 KN/m2 for all regions);

1.3 Special loads, including wind load under special conditions, such as storm conditions (0.80KN/m2 for 0-20m above the ground and 1.10KN/m2 for more than 20m above the ground)

During calculation, each load in accordance with the specification shall be multiplied by the corresponding load coefficient. It is obvious that these load coefficients are completely different from the partial load coefficients adopted by the current civil engineering according to the limit state theory.

When the foundation bottom area is determined according to the requirements of the current national standard Code for Design of Building Foundation (GB5007-2002) according to the bearing capacity of the foundation, the standard combination of load effect under the normal service limit state shall be followed; When calculating the foundation and reinforcement, the load effect combination transmitted from the upper part and the corresponding foundation reaction shall be based on the basic combination of load effect under the limit state of bearing capacity, and the corresponding load partial factor shall be adopted: