Research on the Springback Quantity of the Load Test on High-Speed Railway

Abstract:

With the development of high-speed railway, roadbed reinforcement of its use of high strength prestressed concrete pipe pile, and reflected wave method with low strain and slow preloading method for integrity testing of the pile and pile load test, according to “Technical specification for testing of railway piles” TB10218-2008 requirements, slow static test of the maximum load of not less than 2 times the design load; pile field under construction, the pile placed on top of limestone , pile bearing stratum good features, especially more complete proposed limestone pile placed on top of limestone (rock) of the pipe, the static test pile to take the maximum load of 1.2 times the design load, and load and take Q-s curve of settlement, maximum springback quantity and the corresponding settlement is vertical bearing capacity characteristic value of single pile.

• Periodical: Applied Mechanics and Materials (Volumes 99-100)
• Pages: 414-419
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.99-100.414
• Online since: September 2011
• Authors: Ju You Chang, Zhi Jun Liu
• Keywords: High Strength Prestressed Concrete Pipe Pile, Maximum Springback Quantity

References

[1] JGJ106-2003, Technical Code for Testing of Building Foundation Piles

[2] TB 10218-2008, Technical Code for Testing of Foundation Piles of Railway Engineering

[3] JGJ79-2002, Technical Code for Ground Treatment of Buildings

[4] GB50021-2001, Code for Investigation of Geotechnical Engineering

[5] TB 10013-2004, Code for Geophysical Prospecting of Railway Engineering

[6] TB 10102-2004, Code for Soil Test of Railway Engineering

[7] GB/T50123-1999, Standard for Soil Test Method

[8] Chang Ju-you, Li Zhi-jun, Zhou Qi-xiang. J. of Railway Engineering Society, 2008，113（2）：35-39