|Table of Contents|

Study on ultimate bearing capacity of new type of blade-type spiral steel pipe pile(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年02期
Page:
180-189
Research Field:
岩土工程
Publishing date:

Info

Title:
Study on ultimate bearing capacity of new type of blade-type spiral steel pipe pile
Author(s):
ZHU Yanpeng1; 2;  ZHANG Hui1; 2;  WANG Xuelang3;  ZHU Jiahui1; 2;  HAUNG Anping1; 2;  ZHANG Xingwang1; 2;  WANG Ao1; 2
(1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 3. School of Architecture and Art Design, Lanzhou University of Technology, Lanzhou 730050, Gansu, China)
Keywords:
new type of blade-type spiral steel pipe pile;  ultimate bearing capacity;  on-site test;  numerical simulation;  blade parameter
PACS:
TU473
DOI:
10.19815/j.jace.2023.07073
Abstract:
In view of the limitations of traditional blade-type spiral steel pipe piles in terms of bearing capacity, a new type of blade-type spiral steel pipe pile with gradually changing blade diameter was proposed by improving its geometric structure to enhance its ultimate bearing capacity. Six sets of compressive tests and six sets of tensile tests were conducted, with one pile in each set of compressive tests and two piles in each set of tensile tests, to study the influence of blade spacing and blade diameter variation on the bearing capacity of spiral steel pipe piles. A model was established by using numerical simulation software ABAQUS and compared with measured data to verify the accuracy and precision of the model. By comparing on-site test results with numerical simulation results, the improvement effect of the new blade-type spiral steel pipe pile on the ultimate bearing capacity was analyzed. The results show that the change of blade parameters has a significant impact on the bearing capacity of spiral steel pipe piles. The gradual variation of blade diameter is positively correlated with the ultimate bearing capacity of spiral steel pipe piles, that is, an appropriate increase in blade diameter can significantly improve the bearing capacity of piles. The blade spacing determines the bearing mode of spiral steel pipe piles, and any changes in it will also affect the ultimate bearing capacity of the piles. Under the same amount of steel used, compared with traditional spiral steel pipe piles, the compressive bearing capacity of the new blade-type spiral steel pipe pile is increased by about 28%, and the tensile bearing capacity is increased by about 13%. The feasibility of using ABAQUS numerical simulation software in the analysis of the bearing capacity of the new type of blade-type spiral steel pipe pile is verified, and the reliability of this pile type in the uneven bearing capacity foundation of rural residential buildings is further demonstrated.

References:

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Last Update: 2025-03-20