Impact of Surcharge Loads on High-Speed Railway Bridge Piles in Soft Soil Areas and Effects of Rectifying Deviation

As a common problem in engineering, surcharge loads have a considerable impact on the foundation of adjacent buildings and structures. In a certain section of a high-speed railway in soft soil areas, the horizontal deviation of several bridge piers is found because of the large-area surcharge loads nearby. To analyze the influence of surcharge loads on these bridge piles, this paper computes the horizontal displacement and bending moment of piles by the method of elastic foundation reaction (i.e. m method) and numerical simulation based on the project case. The computed results of m method indicate that the maximum horizontal displacement of pile is situated at the bottom of cushion cap and the maximum bending moment appears 5m below, while these maximum indicators of pile are observed 15m below the cushion cap in the numerical simulation. The numerical analysis also shows that the horizontal displacement and bending moment of the pile that is closest to surcharge loads is greater than those of other piles. Additionally, some measures like unloading and driving high-pressure jet grouting piles are taken to rectify deviation. The numerical simulation shows that, after rectifying deviation, the maximum bending moment of pile top reduces by 20% and the maximum horizontal displacement and bending moment of pile shaft decreases by more than 50%, which has a positive effect on rectifying deviation.

• Record URL:
  https://doi.org/10.1061/9780784413159.173
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784413159
• Supplemental Notes:
  • © 2013 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Jia, Yu
  • Yang, Longcai
  • Liu, Xinchuang
• Conference:
  • Fourth International Conference on Transportation Engineering
  • Location: Chengdu , China
  • Date: 2013-10-19 to 2013-10-20
• Publication Date: 2013-10

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1195-1201
• Monograph Title: ICTE 2013: Safety, Speediness, Intelligence, Low-Carbon, Innovation

Subject/Index Terms

• TRT Terms: Bending moments; Deviatoric stress; Foundations; High speed rail; Load factor; Numerical analysis; Railroad bridges; Soft soils; Support piles
• Uncontrolled Terms: Surcharge loads
• Subject Areas: Bridges and other structures; Geotechnology; Railroads; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics;

Filing Info

• Accession Number: 01516713
• Record Type: Publication
• ISBN: 9780784413159
• Files: TRIS, ASCE
• Created Date: Mar 3 2014 9:30AM