Method for calculating service life of limestone slope based on corrosion rate

Abstract

The invention discloses a method for calculating the service life of limestone slope based on the corrosion rate. The method comprises the steps of drafting basic parameters for the calculating the service life of the limestone slope; carrying out stress analysis on a limestone slope sliding body; calculating the effective lengths of the through section and the non-through section of the limestoneslope structural plane after n years of service according to the corrosion rate; calculating shear resistance parameters of the through section of the structural plane after n years of service according to the corrosion attenuation rate of the shear resistance parameters of the through section of the structural plane; establishing a long-term occurrence stability nonlinear mathematical programming model of the limestone slope; and solving the service life of the limestone slope. According to the method, the effective length of the through structural surface in the service period is calculatedaccording to the rock mass corrosion rate of the limestone slope, the shear resistance parameter in the service period is calculated according to the shear resistance parameter corrosion attenuationrate, a long-term occurrence stability nonlinear mathematical programming model of the limestone slope is established on the basis of an objective function, a balance equation and yield conditions, and the problem of mathematical modeling for predicting the service life of the limestone slope is solved.

Description

technical field [0001] The invention relates to a calculation method for the service life of a limestone slope based on a dissolution rate, and belongs to the technical field of slope stability analysis. Background technique [0002] Limestone is the abbreviation of limestone, which is a carbonate rock mainly composed of calcite, which belongs to sedimentary rock according to its genetic classification. The main chemical composition of limestone is CaCO 3 , very erodible. Limestone slopes are widely distributed in southwestern my country. The structural planes in limestone slopes will be eroded under the action of water and atmosphere, and the effective length of structural planes will increase with time. The shear parameter also decays with dissolution. During the service process of limestone slopes, due to the dissolution of limestone rock mass, the length and strength of structural planes will change, and the long-term safety of limestone slopes will decline year by yea...

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Problems solved by technology

[0004]At present, there is no perfect calculation method for the service life of limestone slopes based on the dissolution rate in the engineering field, and it is urgent to establish a theory for calculating the service life of limestone slopes Methods and mathematical models to provide theoretical guidance for the design of limestone slopes by quantitatively and accurately evaluating the long-term safety of limestone slopes

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