Load-Bearing Arching Between Cantilever Piles and Influencing Factors

 

Zhen-qiang Wang1

1: College of Civil Engineering, Chongqing University, Chongqing 400045, China
2: Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing 400045, China; e-mail: zhenqiangk

Yong-xing Zhang1, 2, Chao Yang1, Xin-zhe Li1, 3

1. College of Civil Engineering, Chongqing University, Chongqing 400045, China
2: Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing 400045, China
3: College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China

 

 ABSTRACT

The soil between Cantilever piles formed the load-bearing arching in the soil under the action of gravity, itís existence effectively enhances the stability of soil between piles and reduce the pressure on the damper between piles. This paper assumes that the loading in arch axis is uniformly distributed load, thus the arch axis of load-bearing arching is parabola, according to the characteristics of the principal stress change with depth and the deflection, it is concluded that the lateral pressure coefficient of load-bearing arching, with the introduction of Protodyakonov's coefficient, it is concluded that the formula of the strength coefficient of the load-bearing arching, the difference of the height and pile spacing about the cantilever caused the different boundary conditions, the formula on the arch height and arch thickness is concluded in the corresponding boundary conditions, according to the load balance of the load-bearing arching. Research has shown that the difference between the load-bearing arching and the surround is expressed by the lateral pressure coefficient and the strength coefficient  of the load-bearing arching; When ,the arch height and arch thickness decreases with the increase of pile spacing; When, the arch height increases with the increase of pile spacing, while the arch thickness decreases with the increase of pile spacing.

Keywords: load-bearing arch, Protodyakonov's theory, thickness of arching, lateral pressure coefficient

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