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Method for computing optimal anchoring angle of rock slope wedge

A calculation method and technology of rock slopes, applied in calculation, excavation, special data processing applications, etc., can solve problems such as numerical solution difficulties, lack of mechanical concept calculation models, and increase in the number of hyperstatic indeterminacy

Active Publication Date: 2015-06-03
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] (1) It is difficult to determine the optimal direction of the anchoring force, especially for wedge-shaped bodies with complex spatial shapes, and it is difficult to calculate the position and angle of the anchor rod layout
[0005] (2) There is a lack of a calculation model for determining the optimal angle of anchorage with a clear concept of mechanics
The stability of the wedge is a statically indeterminate mechanical problem. After considering the anchorage angle, the number of indeterminate times will increase, which makes it difficult to solve numerically.

Method used

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  • Method for computing optimal anchoring angle of rock slope wedge
  • Method for computing optimal anchoring angle of rock slope wedge
  • Method for computing optimal anchoring angle of rock slope wedge

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Embodiment 1

[0055] 1. To formulate wedge slope parameters:

[0056] A symmetrical wedge slope such as Figure 6 As shown, the wedge-shaped body is 12.0m high, and the rock mass density is 26.0kN / m 3 , geometric parameters and intensity parameters are shown in Table 1, and the coordinates of key points are: A(-11.2,0.00,12.00), B(0.00,6.46,12.00), C(11.2,0.00,12.00), O(0.00, 0.00,0.00);

[0057] Table 1 Geometric properties and strength parameters of the wedge-shaped body of the embodiment

[0058]

[0059] 2. Establish a nonlinear mathematical programming model for solving the optimal anchoring angle of the wedge:

[0060] According to the above parameters combined with figure 2 , image 3 , Figure 4 , carry out the force analysis of the wedge; and deduce the objective function, equilibrium condition, yield condition and boundary condition of the mathematical model, and form a nonlinear mathematical programming model for solving the optimal anchoring angle of the wedge and maxi...

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Abstract

The invention discloses a method for computing an optimal anchoring angle of a rock slope wedge, and belongs to the technical field of analyzing the stability of a rock slope and strengthening the rock slope. A security coefficient of the wedge-shaped slope serves as an objective function, the angle and the direction of anchoring force serve as optimization variables, constraint conditions such as the balance equation of the wedge, the yield condition of a structural surface and the boundary condition are combined, and the method which is used for computing the optimal anchoring angle of the wedge and can maximize the security coefficient is provided. The computing method can compute and obtain the optimal anchoring angle of the wedge accurately, easily and conveniently, has the advantages of being clear in concept, high in computing accuracy and the like, and brings convenience for engineering technicians to carry out optimal design for strengthening the wedge so as to achieve the purpose of being safe and economical.

Description

technical field [0001] The invention relates to a calculation method for rock slope reinforcement, in particular to a reinforcement calculation method for a wedge-shaped body in a rock slope, and belongs to the technical field of rock slope stability analysis and reinforcement. Background technique [0002] In the construction process of hydropower, transportation, mining and other projects in our country, various types of rock slope stability problems will be encountered, among which the stability of wedges is the most common one. Anchor rods (prestressed anchor rods or prestressed anchor cables) are the most important means of strengthening wedges. The mechanism of the anchor rod to improve the stability of the wedge body includes two aspects: one is that the anchoring force of the anchor rod reduces the sliding force of the wedge body, that is, the component force of the anchoring force along the sliding direction of the wedge body is opposite to the sliding direction of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20G06F19/00
CPCY02A10/23
Inventor 李泽张立翔曾云
Owner KUNMING UNIV OF SCI & TECH
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