Method for analyzing stability of ribbed slope

Abstract

The invention discloses a method for analyzing the stability of a ribbed slope. In the stress analysis of soil stripes, the anti-skid force provided by tie bar strips is added, and the influences of the size and direction of the anti-skid force of the tie bar strips on the soil stripes are taken into consideration. Compared with an existing method for analyzing the stability of a ribbed slope, the method is more comprehensive on the aspect of stress analysis of the soil stripes, the stress of the soil stripes can meet balance equations of force and torque at the same time, and thus the stability of the slope can be more accurately analyzed; and the method is suitable for any sliding face in a circular arc shape and a fold line shape.

Description

technical field [0001] The invention relates to the field of civil engineering slope stability analysis, in particular to a method for analyzing the stability of a reinforced slope. Background technique [0002] At present, the stability of slopes is a common geotechnical engineering problem in construction projects such as water conservancy and hydropower, highways, railways, and mineral resource development in my country. Slope disasters caused by natural landslides, debris flows, and human engineering activities have brought huge losses to my country's economic construction and people's lives and property. Therefore, the stability analysis of slopes is of great significance to the safety of slope engineering protection. [0003] Slope stability analysis is a classic research field in geotechnical engineering. Many scholars at home and abroad have devoted themselves to research in this area and achieved fruitful results. The most widely used slope stability analysis meth...

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Problems solved by technology

[0005] At present, in the technical field of slope stability analysis, most of them focus on the analysis of the natural slope structure, and the reinforced slope is more complex than the natural slope structure. Due to the complexity of its structure, although it is theoretically Some analysis schemes were proposed, such as Rowe and Soderman (1985) extended the simplified Bishop method to make it possible to evaluate the stability of reinforced slopes, but this method only satisfies the moment balance and is only applicable to circular sliding surfaces

Leshchinsky and Boedeker (1989), Jewell (1991), Wright and Duncan (1991), Zornberg et al. (1998) used the limit equilibrium analysis method to carry out the stability analysis of reinforced slopes. In the computational analysis, Leshchinsky and Boedeker (1989) Using logarithmic spiral surface sliding surface, Jewell (1991) using double broken line sliding surface, Wright and Duncan (1991), Zornberg et al. Satisfies force balance and moment balance, and the applicable sliding surface is limited

According to the "Geosynthetics Application Manual", there are two types of stability analysis methods for reinforced slopes. The first type is to calculate the safety factor of reinforced slopes by adding reinforcement tension on the basis of the simplified Bishop method. The method does not consider the tangential interstrip force of the soil strip, and is only applicable to the circular sliding surface, and only satisfies the moment balance condition of the soil strip force, but cannot satisfy the force balance condition. The second type is based on the simplified Janbu method Adding the tensile force of reinforcement, although this method is applicable to non-circular sliding surfaces, it only satisfies the balance condition of soil strip force, not the moment balance condition

Therefore, there is no effective stability analysis method for designers to use in this technical field, making it difficult for technicians to accurately evaluate the safety factor and stability of reinforced slopes

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