Application of underwater photography and high strength grouting in the treatment of insufficient bearing capacity of prestressed pipe piles
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The Second Geological Prospecting Insitute of Henan, Zhengzhou Henan 450000, China

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TU473.1

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    Abstract:

    High strength prestressed concrete pipe piles (PHC) have been widely used in the construction of high-rise buildings in heavy-haze shrouded northern China due to its features of pre-visible quality, high-strength, environmental protection, efficient and flexible construction. In reference to a field case of pipe pile construction for a high-rise residential building in Henan province, this paper introduces the problem of insufficient bearing capacity caused by construction, stratum and other factors in the process of pipe pile construction; underwater photography technology used to accurately determine the problem while the conventional detection methods such as low strain cannot accurately determine the causes; and the treatment process of re-pressing, high-strength grouting and other methods. It provides can some reference for the treatment of similar projects.

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History
  • Received:November 19,2020
  • Revised:August 20,2021
  • Adopted:February 26,2021
  • Online: September 23,2021
  • Published: September 10,2021