›› 2010, Vol. 31 ›› Issue (2): 449-454.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of bearing capacity of a single pile under adjacent building subjected to lateral soil movements

LIANG Fa-yun1, 2, YU Feng1, 2, LI Jing-pei1, 2, YAO Guo-sheng1, 2   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2009-09-11 Online:2010-02-10 Published:2010-03-24

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Abstract:

Lateral soil movement due to surcharge loads and pit excavation often occurs in urban construction. The lateral soil movement may generate additional internal forces and deformation in pile foundation of adjacent buildings, and may lead to the damage of adjacent pile foundation and engineering accidents. Based on the Winkler’s foundation model and deformation compatibility condition of pile and soil, the horizontal displacement control equation of a single pile is established. According to the differential relations between the internal forces and displacements, the two-stage method is adopted to solve the equations. With the typical engineering accident, the influence of lateral soil movements on adjacent pile foundation is investigated by parametric analysis of the pile bearing capacity. The analysis shows that the stability of retaining wall and the excavation depth have an important impact on the safety of adjacent pile foundation. One of possible causes resulting in the collapse accident of a high-rise building in Shanghai is obtained from the analysis.

Key words: two-stage method, Winkler’s foundation model, passive piles, lateral soil movement, retaining wall

CLC Number: 

  • TU 473.1
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