Pile net for landslide or rockfall disaster protection and design method thereof

Abstract

The invention discloses a pile net for landslide or rockfall disaster protection and a design method thereof. The pile net for landslide or rockfall disaster protection includes at least two anti-slide piles arranged adjacent to a rock and soil mass and deepened in a stable rock stratum under a sliding surface. Flexible protective nets whose two sides are fixed on the anti-slide piles through a plurality of pull rings are arranged between the two adjacent anti-slide piles. The design method of the pile net includes an arch axis equation corresponding to an arch when forming a soil arching effect of the rock and soil mass; according to the static balance of the soil arch, the axial pressure on the arch axis is calculated; when the axial pressure has the maximum value, a failure surface of the soil arch can be obtained according to an arch distance corresponding to the maximum axial pressure; when the pile is in a static equilibrium condition, the angle between the failure plane and a horizontal plane is calculated; based on the principle that a trapezoidal compression zone at the failure surface is not destroyed and the Kulun strength theorem, the pile distance of the two adjacent anti-slide piles is calculated; according to the collapse amount of empty soil between the piles, the strength of the flexible protective nets is calculated.

Description

technical field [0001] The invention relates to the field of rock and soil landslide protection, in particular to a pile net for protection against landslides or rock rolling disasters and a design method thereof. Background technique [0002] Pile-slab wall is a kind of anti-sliding retaining structure, which is composed of anti-sliding piles and retaining plates or retaining walls between piles. The anti-slide pile goes deep into the stable stratum below the sliding surface, transmits the remaining sliding thrust (or earth pressure) of the upper rock and soil mass to the stable stratum, and uses the anchoring effect and passive resistance of the stable stratum to ensure the overall stability of the rock and soil mass. Or the retaining wall bears the earth pressure of the empty soil between the piles. [0003] Anti-slide piles are a commonly used structure in slope retaining engineering, and the pile spacing is an important index in the design of anti-slide piles. Based o...

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Problems solved by technology

However, if it is directly used for slope support, there will be an empty surface in the soil between the two piles. Under the action of external load and its own gravity, the soil between the piles may be partially damaged. In addition, the retaining soil of the traditional pile-slab wall Because the slab does not consider the blocking effect of the soil arch effect on the sliding body, the calculation of the earth pressure on the retaining slab is often too high, and the designed retaining slab has a large section thickness and a high reinforcement ratio, resulting in a great waste of materials

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