Method and device for establishing weir body model

Abstract

The invention discloses a method and device for establishing a weir body model. The method comprises the following steps: obtaining the geometric dimension of a weir body, and constructing a second-order cone programming model according to the geometric dimension of the weir body; calculating dissipated energy of each unit in the second-order cone programming model; determining and marking an encryption unit and a sparse unit in the second-order cone programming model according to the dissipated energy sequence of each unit; adding a new node on the long edge of the encryption unit, adding a new node on the common edge of the two sparse units, and deleting two end points of the common edge to form a node cloud set; a second-order cone programming model based on Delaunay triangulation redivision is established according to the node cloud set, and when the new second-order cone programming model meets preset initial and boundary conditions, the new second-order cone programming model serves as a weir body model; according to the method, the second-order cone programming model can achieve the effect of simulating the sliding surface in a long, narrow and dense grid form, the key parameters of the sliding surface are accurately defined, and a basis is provided for formulating engineering measures.

Description

technical field [0001] The invention belongs to the technical field of weir body simulation, and in particular relates to a method and device for establishing a weir body model. Background technique [0002] In recent years, my country's transportation infrastructure has developed rapidly. When building traffic tunnels in coastal areas, it is often necessary to carry out large-scale artificial island construction projects. Artificial islands in shallow waters can use earth-rock cofferdam structures, but they usually face the following problems during construction. First, the weather in the shallow sea area is changeable and the sea conditions are complex. High humidity, high salinity, and frequent extreme weather make the structure of the island vulnerable to damage, which threatens the overall stability in severe cases. Second, the earth-rock cofferdam of shallow sea artificial island is a high earth-rock cofferdam structure with high weir body and large weir slope, and i...

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Problems solved by technology

High humidity, high salinity, and frequent extreme weather, the island structure is vulnerable to damage, which threatens the overall stability in severe cases

Second, the earth-rock cofferdam of shallow sea artificial island is a high earth-rock cofferdam structure with high weir body and large weir slope, and its own stability is poor

The third is that the geological conditions of the seabed are complex, generally overlying a variety of weak soil layers, and its physical and mechanical properties are poor

[0005] Usually, the upper bound finite element method of limit analysis is used to simulate the stability of soil slopes, but the number of grids in this method is too dense and the degree of freedom is too much, which has a great impact on the accuracy of calculation results.

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