Study on the Influence of Pile Installation Disturbance on the Settlement of Composite Foundation
Source abstract
Abstract
The disturbance generated during the pile installation process increased the compressibility of the soil between the piles, thereby causing additional settlement of the composite foundation. This study was conducted against the background of a highway soft foundation treatment project in Zhongshan. Before and after the installation of cement mixing piles (CMP) and pre-stressed high-strength concrete pipe pile (PHC), a piezocone penetration test (CPTU) was applied to assess the soil between the piles and quantify the disturbance. Based on this, the settlement of the composite foundation was predicted using the stress modified method and finite element method (FEM). The results indicate that under low embankment load (<2.5 m), the installation of PHC piles reduces the compression modulus of the soil between the piles by approximately 30%, while CMP results in a reduction of about 10%. Disturbance settlement from CMP and PHC piles accounts for approximately 3–10% and 17–28% of the total settlement, respectively. This impact diminishes with the increase of embankment load.
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Research context
OpenAlex topics: Geotechnical Engineering and Soil Stabilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
Institute of Geotechnical Science and Engineering, Hohai University, Nanjing 210098, China
Institute of Tunnel and Underground Engineering, Hohai University, Nanjing 210098, China
Nanchang Institute of Technology, School of Civil and Architectural Engineering, Nanchang 330099, China
Juye County People’s Government Office, Heze 274900, China
Funding
National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
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Show source-provided references
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