Anchor wire prestress loss and rock-soil body creep coupling based computing method for side slope creep values

Abstract

The invention discloses an anchor wire prestress loss and rock-soil body creep coupling based computing method for side slope creep values. The computing method comprises the following steps: selecting the side slope that is comparatively uniform in soil body materials and properties and low in stability; determining the physical and mechanics parameters of the rock-soil body of the side slope; determining the water content W, the volume weight r, the uniaxial compressive strength Rc, the tensile strength Rt, the deformation modulus Eo, the cohesive force C and the internal frictional angle Phi of the rock-soil body; determining the creep curvilinear equation of the rock-soil body; determining the instantaneous elastic modulus Eh, the lagging elastic modulus Ek and the viscosity coefficient Eta<k> of the rock-soil body; bringing all the parameters into the relaxation equation of the coupling effect computation module, and working out the relational expression of the variation of anchor wire stresses and time; computing the anchor wire stress value at each time point according to the relational expression of the variation of anchor wire stresses and time, and figuring out the anchor wire prestress loss according to the anchor wire stress calculated value at each time point. The computing method can correctly reflect the variation situation of the strained condition of the prestressed anchor wire.

Description

technical field [0001] The invention belongs to the technical field of prestressed anchor cable anchoring engineering, and relates to a slope creep calculation method based on the coupling of anchor cable prestress loss and rock and soil creep. Background technique [0002] When solving the stability problems of high and steep slopes that accompanies the construction of open-pit mining projects, highway projects, high-speed railway projects and dam projects, the prestressed anchor cable anchoring technology is the best way to solve the problem of high and steep slope reinforcement. The key technology, its technological advancement and effect reliability have been confirmed by a large number of engineering practices, and have been widely promoted and applied. [0003] Although the prestressed anchor cable has played an important role in controlling the stability of high and steep slopes, it has prevented the occurrence of landslides on unstable slopes. However, high and stee...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a slope creep calculation method based on the coupling of anchor cable prestress loss and rock and soil creep, which solves the problem that the commonly used rheological calculation models of rock and soil do not consider the coupling of stress relaxation and creep The effect relationship is accurate when describing a single property of rock and soil. However, if the coupling effect relationship between rock and soil creep and prestress loss is considered, the current rheological model of rock and soil cannot correctly describe the two The problem of the coupling effect relationship between

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