Calculating method for vertical bearing capacity correction coefficient and bearing capacity of inclined steep slope bridge pile foundation

Abstract

The invention discloses a calculating method for the vertical bearing capacity correction coefficient and the bearing capacity of an inclined steep slope bridge pile foundation. The method comprises the steps that firstly, the pile foundation bearing capacity influence degree [alpha]v under different slopes is calculated, and then the pile foundation side friction reduction coefficient [zeta]v iscalculated according to the pile foundation bearing capacity influence degree [alpha]v obtained in the first step, wherein [zeta]v=1-[alpha]v. After the obtained bearing capacity is multiplied by thecorrection coefficient, the vertical bearing capacity of the pile foundation is closer to the actual bearing capacity of a bridge pile foundation in an inclined steep slope region, and the occurrencerate of engineering accidents is avoided. After the correction coefficient is considered, the vertical bearing capacity of the inclined steep slope bridge pile foundation is more accurate, the designaccuracy can be improved in the pile foundation design, and design changes caused by uncertainty factors in engineering are reduced. After the correction coefficient is multiplied, the design of the pile foundation is closer to an actual value, the material waste is reduced, and the construction cost of the pile foundation is reduced.

Description

technical field [0001] The invention belongs to the technical field of civil engineering bridge design and construction, and in particular relates to a vertical bearing capacity correction factor and a bearing capacity calculation method of pile foundations of steep slope bridges. Background technique [0002] With the continuous development of the highway industry, the role of bridges in highway construction is becoming more and more significant, and bridge pile foundations are one of the main foundation forms in bridge engineering. The load on the upper part of the bridge is transmitted to the foundation through the pile foundation. The bearing capacity of the bridge pile foundation is mainly provided by the pile side friction resistance and the pile end resistance. The pile foundation bearing capacity is divided into friction piles and end-bearing piles according to the share of the pile side friction resistance. When the bearing capacity of the pile foundation is mainly ...

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Problems solved by technology

[0010] (1) The calculated value is higher than the actual bearing capacity, which reduces the safety factor of the bearing capacity of the bridge pile foundation on the steep slope and easily causes traffic accidents

[0011] (2) It brings difficulties to the design of bridge pile foundation. According to the calculation formula of traditional pile foundation bearing capacity, the bearing capacity is too high. There is no relatively accurate bearing capacity value, which is not convenient for pile foundation in the design process of bridge pile foundation bearing capacity. design

[0012] (3) It is easy to cause waste of materials and increase design and construction costs

In the design, according to the conventional formula, the bearing capacity is calculated to be larger than the actual one, but there is no relatively accurate value for how much it is larger, and the designer will blindly increase the pile foundation size, reinforcement, etc. for the sake of safety (may not be used in practice, so Multi-material), it is easy to cause an increase in engineering costs

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