Evaluation on Bearing Capacity Improvement of Cast-In Situ Bored Piles Using Post-Grouting Technology

Abstract:

Post-grouting technology is an effective method of improving mud cake in the pile tip and debris in the pile side. What’s more, it is also considered as a great method to improve the bearing capacity of the cast-in-situ bored pile. The post-grouting technology is used in the foundation of a tall office building in Shan Dong province. For this project, comparing results of the static load test and the theoretical calculation, some conclusions can be made that the bearing capacity of post-grouting pile is 126.5% more than that of unpost-grouting one, the ratio between the tip resistance and the side resistance of the post-grouting pile are 39.8% and 60.2% respectively, and the ratio between the tip resistance and the side resistance of the unpost-grouting pile are 28.9% and 71.1% respectively. It is estimated that the cost of cast-in-situ bored piles using post-grouting technology is 45%~50% cheaper than the unpost-grouting piles.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 168-172
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.168
• Online since: October 2012
• Authors: Jing Cai, Yong Yu Wang, Xin Hua Wang, Hua Wei Yan
• Keywords: Cast-In Situ Bored Pile, Economic Benefit, Post-Grouting Technology, Ultimate Bearing Capacity

References

[1] Peilong Shi: Practical project manual of the pile in Chinese [M]. Beijing: China Architecture Building Press. (1999)

[2] Fan Chen, Tianping Xu: Detection Technique of the Quality of Pile in Chinese [M]. Beijing: China Architecture Building Press. (2003)

[3] Hong Zhang: The Detection and Treatment of Cast-in-situ bored pile in Chinese [M]. Beijing: China Communications Press. (2001)

[4] Hongbo Zhou: Numerical Simulation of the Relationship of Bearing Capacity of Post-grouting Bored Pile and Grouting Parameters in Chinese [J]. Industrial Construction, 2005, 35(9):60-61

[5] China Academy of Building Research: Technical Code for Building Pile Foundations in Chinese (JGJ94—2008) [S]. Beijing: China Architecture Building Press. (2008)

[6] China Academy of Building Research: Technical Code for Testing of Buliding Foudation Piles in Chinese (JGJ106—2003) [S]. Beijing: China Architecture Building Press. (2003)

[7] Ping Qi: The Bearing Capacity Research and Settlement Prediction the Post-grouting Bored Pile in Chinese [D]. Liaoning Technical University. (2009)