Method for designing anchoring hole structure for reinforcing rock slope

Abstract

The invention discloses a method for designing an anchoring hole structure for reinforcing a rock slope, which comprises the following steps of: firstly, initially sketching parameters including the position, the length, the cross section shape and the like of an anchoring hole; secondly, simplifying the anchoring hole into a beam element to establish a finite element model for reinforcing the slope; thirdly, calculating internal force of the anchoring hole by using the finite element model; and finally, designing reinforcing bars of the anchoring hole and optimizing design parameters according to the internal force calculation result and a concrete member design theory. The method has the advantages of clear concept, high calculation accuracy and the like, facilitates the good design of the anchoring hole structure of an engineering technical personnel.

Description

technical field [0001] The invention relates to slope reinforcement design technology, in particular to an anchoring hole structure design method for strengthening rock slopes. Background technique [0002] The anchor hole is an engineering structure used to reinforce hard and relatively complete rock slopes. Anchorage holes are widely used in the treatment of large deep landslides controlled by weak structural planes, especially in slope reinforcement projects of water conservancy and hydropower projects, such as the No. 2 slide body of Hongjiadu Power Station, the right bank slope of Dagangshan Power Station, etc. . The axis of the anchor hole is generally parallel to the sliding direction, and is horizontal or slightly inclined to the inside. The anchorage hole is arranged along the direction of the hole axis to bear the main steel bar (or section steel, steel pipe), and the hole is filled with concrete, and the main steel bar is mainly under the action of tension. The...

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Problems solved by technology

[0011] (1) It is difficult to determine the load of the anchorage hole, especially when the slope adopts multiple reinforcement forms or the anchorage holes are arranged in layers, it is difficult to accurately calculate the landslide thrust acting on the anchorage hole and its distribution form;

[0012] (2) Lack of a calculation model for anchorage holes with clear mechanical concepts

At present, the calculation methods of anti-sliding piles that are similar to the action mechanism of the anchor hole mainly include the cantilever beam method and the foundation coefficient method, etc., but the change of load and calculation parameters has a great influence on the calculation results of this type of method, which is difficult to meet the design requirements of the anchor hole

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