Method for calculating and predicating post-construction settlement of suspension seawall

Abstract

The invention relates to a method for calculating and predicating post-construction settlement of a suspension seawall. According to the method for calculating and predicating the post-construction settlement of the suspension seawall, the accuracy for calculating and analyzing data is improved. According to the technical scheme, the method comprises the steps of a, determining the variable quantity between soil geological parameters before and after the blast action, dividing the soil disturbance range into a plurality of disturbance areas, and determining the strength reduction coefficient f of soil of the different disturbed areas by the blast; b, setting up a whole calculating model of the seawall foundation by a finite difference software FLAC, and dividing finite element meshes according to the soil disturbance range; c, selecting an elastic-plastic constitutive model suitable for saturated soft soil; d, initializing crustal stress calculation, and verifying the reasonability and accuracy of the elastic-plastic constitutive model; e, further conducting numerical calculation, obtaining the relations between the post-construction settlement and time, between the post-construction settlement and loads and the like, analyzing and predicating the post-construction settlement, and summarizing the change law of the post-construction settlement of the foundation soil under the different working conditions.

Description

technical field [0001] The invention relates to a method for calculating and predicting post-construction settlement of a suspended seawall, which is mainly suitable for calculating and predicting post-construction settlement of a "suspended" seawall formed by blasting and squeezing silt construction technology. Background technique [0002] Most marine development and reclamation projects require the construction of hydraulic structures such as seawalls and cofferdams, and the effect of soft foundation treatment is the key to the success of the project. Plastic drainage boards and blasting silt squeeze are commonly used soft foundation treatment technologies in reclamation projects. The blasting silt squeeze embankment technology has the characteristics of simple construction process and fast speed, and has been applied in many marine reclamation projects. With the advancement of the reclamation project, the thickness of the silt treated by blasting and squeezing is gradual...

AI Technical Summary

Problems solved by technology

Both the layered sum method and the code method use the compressibility index under the confinement condition, and assume that the foundation is a homogeneous linear deformation half space, which is different from the stress state and viscoelasticity of the soil, which will lead to deviations in the calculation results larger

However, in the existing finite element calculation, the dynamic disturbance effect of blasting on soil layers in different regions is not considered in the modeling process. Only by determining the disturbance range of the blasting effect on the soil layer and the variation of soil parameters, and then modeling calculation and analysis can truly reflect the stress of the stratum

Therefore, the current settlement calculation and analysis method is not suitable for the "suspended" seawall structure formed by blasting and silting, it needs to be improved, new calculation ideas and methods are proposed, and the dynamic disturbance effect of blasting on the foundation soil is considered, so that it is suitable for Calculation and Prediction of Settlement of "Suspended" Seawall Structure Formed by Blasting and Squeezing Silt

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