A method for strengthening design of unstable slopes

Abstract

The invention provides an unstable slope reinforcement design method which comprises the steps of (1) determining that a slope in a design is at an unstable state; (2) searching sliding surfaces withsafety coefficients being equal to 1, and adopting a sliding surface with a sliding soil mass capacity being a maximum value as a damaged sliding surface; (3) according to a position of the damaged sliding surface, designing the lengths and the number of supporting anchor piles, and determining a preliminary reinforcement design scheme; and (4) verifying the stability of the reinforced slope untilthe minimum safety coefficient is larger than 1 and a relevant standard requirement is met. According to the unstable slope reinforcement design method provided by the invention, a position of the sliding surface is determined on the basis of a strategy that the safety coefficient is equal to 1 and the sliding soil mass capacity is a maximum value, the lengths of the anchor piles are calculated,and the unstable slope is finally stabilized; and through effectively determining the real damaged sliding surface, the lengths of the anchor piles can be effectively determined, and a reasonable anchor pile supporting scheme is finally provided, so that the unstable slope reinforcement design method is high in reliability and stability, and has wide practicability and economic value.

Description

technical field [0001] The present invention relates to the technical field of slope stability analysis and reinforcement design, and specifically relates to a strategy based on a safety factor equal to 1 and a maximum value of the sliding soil volume to determine the position of the sliding surface, and finally stabilize the unstable slope Reinforcement design method. Background technique [0002] Landslide geological disasters occur every year in our country, especially in summer. When a landslide occurs, a certain amount of rock and soil moves from a high place to a low place, causing losses or casualties to buildings or people along the way. For example, in 2017, Xinmo Village, Diexi Town, Maoxian County, Sichuan Province, and Zhangjiawan Town, Nayong County, Bijie City, Guizhou Province suddenly collapsed, causing varying numbers of people to be buried and causing direct economic losses of hundreds of millions of dollars. Therefore, in order to effectively avoid the o...

AI Technical Summary

Problems solved by technology

At present, in the field of slope reinforcement design, using the critical sliding surface corresponding to the minimum safety factor to guide the design is a common strategy in this field. However, for slopes that are unstable in the design stage, the minimum safety factor obtained by traditional methods corresponds The critical sliding surface is actually very different from the real failure sliding surface, which will lead to the fact that the length of the anchor rod determined based on the minimum safety factor sliding surface is too short in the specific design, which cannot provide real anchoring effect, and ultimately leads to the failure of the reinforcement design. expected result

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