Calculation method of responses of pile foundationadjacent to banding surcharge loads(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年02期
- Page:
- 100-107
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Calculation method of responses of pile foundationadjacent to banding surcharge loads
- Author(s):
- ZHAO Weifeng; WEN Junqiang; FENG Kai; WANG Mengmeng; JIA Minghui
- (School of Highway, Changan University, Xian 710064, Shaanxi, China)
- Keywords:
- bridge engineering; theoretical calculation; banding surcharge load; pile foundation; sliding surface
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to analyze the calculation method of the influence of banding surcharge loads on the mechanical characteristics of adjacent pile foundation. The surcharge loads on the ground surface were considered equivalent to the strip foundation load with 0 m depth, based on the formula of Terzaghis foundation bearing capacity. According to the sliding surface range of general shear failure in Terzaghis formula, the limit equilibrium method was used to derive the maximum surcharge height formula. This ensures the stability of the foundation and the scope of influence of the formula under the impact of banding surcharge loads that provide the discriminant conditions to determine the effect of surcharge loads on the adjacent pile foundation. The depth range and soil pressure formula under lateral displacement of foundation soil was obtained. The abovementioned mechanical effects were then applied to the pile foundation adjacent to the surcharge loads. The mechanical model of this pile foundation was simplified as the general passive pile. The pile response was calculated using the m method. The finite element model of the interaction between the surcharge loads and adjacent pile foundation was established to analyze the influence of surcharge load scale on the deformation characteristics of the adjacent pile. The result theoretical formula were compared with that of finite element results. The results show that the soil under surcharge loads is laterally deformed and the adjacent pile foundation is deflected in different degrees. Certain depth range and a primary influence zone are observed in the characteristics of lateral deformation of the soil under the surcharge loads. The effect of surcharge loads on the pile foundation is evident in this distance range. It is maintained at a low level instead of disappearing over this range. The theoretical and finite element calculations exhibit similar rules. However, the theoretical results are slightly conservative than the results of finite element. This study provides reference for similar projects. 4 tabs, 12 figs, 24 refs.
Last Update: 2019-04-01