Corrected Tschebotarioff soil pressure model

Abstract

The invention discloses a corrected Tschebotarioff soil pressure model, which is characterized in that 1) the Tschebotarioff soil pressure model is corrected by adopting a method of a fixed coefficient and a reduction coefficient, and the method is used for the conditions of large parameter difference and strong human factor interference in indoor physical and mechanical tests of soil layers such as hard cohesive soil, silty clay, clayey silt, silt and the like in Beijing areas; 2) through reduction coefficient adjustment, construction disturbance and active constraint conditions are introduced. According to the invention, a reduction coefficient and an effect adjustment calculation formula are innovatively introduced on the basis of an original Tschebotarioff soil pressure model, the reduced Tschebotar ioff soil pressure model is adopted within the 90% H depth range of the upper portion of the retaining structure, and the corrected Tschebotarioff soil pressure model is adopted within the 10% H depth range of the lower portion of the retaining structure, so that fitting of numerical values and laws of an active soil pressure actual measurement and model calculation curve is well achieved, the soil pressure reduction coefficient is determined, and analysis of the working mechanism and stress characteristics of a foundation pit supporting system under the action of soil pressure is facilitated.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, in particular to a modified Tschebotarioff earth pressure model. Background technique [0002] With the continuous development of above-ground space, the construction industry is gradually asking for space underground. The foundation pit support project is facing great challenges. The depth of foundation pit support is deeper, the environment is more complex, and the difficulty is increasing. [0003] The main problems faced by the foundation pit market: the design is dominated by the conventional earth pressure theoretical model, there is a big difference between theory and reality, theoretical research lags behind the development of the industry, and technicians arbitrarily reduce earth pressure. The above-mentioned problems have led to frequent accidents in foundation pits, resulting in a large number of personnel and property losses. [0004] The commonly used earth pressure model...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention proposes a modified Tschebotarioff earth pressure model, with the purpose of solving the problem that the value calculated by the earth pressure model of the prior art is much larger than the actual situation, which makes the engineering conservative and causes great damage. waste problem

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