Specification for length of threaded pile for high-speed railway

The length specifications of high-speed rail threaded piles are 9m, 12m, 15m or 18m. The following are the reasons why the length of threaded piles is 9m, 12m, 15m or 18m: geological conditions, construction technology and design experience.

1. Geological conditions: Threaded piles are mainly used for bearing and supporting in foundation treatment and underground engineering. When choosing the length of threaded pile, geological conditions, such as the stability, bearing capacity and change of underground soil layer, need to be considered. According to the results of geological investigation, the suitable length of threaded pile is determined to meet the stability and bearing requirements of the project.

2. Construction technology: The rebar pile is prefabricated, and the choice of length will also be limited by the construction technology. In the process of prefabrication and transportation, long threaded piles are difficult to carry and carry. In order to facilitate construction operation and management, common length values are set.

3. Design experience: In large-scale engineering projects such as high-speed rail, designers will choose the commonly used and appropriate length of threaded piles according to past experience and practice, combined with geological conditions and engineering requirements. These experiences show that the length of 9 meters, 12 meters, 15 meters or 18 meters is a reasonable choice to meet the engineering requirements.