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Method for computing optimal anchoring angle of rock slope wedge

A calculation method and technology for rock slopes, which can be used in calculation, excavation, special data processing applications, etc., and can solve problems such as difficulty in numerical solution, lack of mechanical concept calculation model, and increase of statically indeterminate times.

Active Publication Date: 2013-08-28
KUNMING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0004] (1) It is difficult to determine the optimal direction of anchoring force, especially for wedge-shaped bodies with complex spatial shapes, and it is difficult to calculate the position and angle of 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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Experimental program
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Embodiment 1

[0055] 1. Draw up the slope parameters of the wedge:

[0056] The slope of a symmetrical wedge is like Image 6 As shown, the wedge-shaped body is 12.0m high and the rock mass density is 26.0kN / m 3 , The geometric parameters and strength parameters are shown in Table 1. The coordinates of the 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 characteristics 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 and combined figure 2 , image 3 , Figure 4 , Carry out the force analysis of the wedge; and derive the objective function, balance condition, yield condition and boundary conditions of the mathematical model to form a nonlinear mathematical programming model that solves the optimal anchor angle of the wedge and maximizes...

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

Claims

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Application Information

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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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