Layered soft soil roadbed modeling method for pile foundation reinforcement under simulated earthquake action

By combining the finite element platform with Python automated scripts, the automated construction of viscoelastic artificial boundaries and the application of equivalent loads for seismic waves were realized, solving the problems of low accuracy and low efficiency in existing numerical simulation methods and improving the simulation accuracy and efficiency of seismic response of pile-supported reinforced embankments.

CN122286887APending Publication Date: 2026-06-26NANJING TECH UNIV
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Patent Information

Application Number
CN202610329546.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-18
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing numerical simulation methods for studying the seismic dynamic response of pile-supported reinforced embankments suffer from problems such as complex static-dynamic boundary transformation, difficulty in setting viscoelastic artificial boundaries, and improper handling of seismic wave reflection and transmission effects, resulting in low simulation accuracy and low efficiency.

Method used

By combining the finite element platform with Python automated scripts, and integrating wave theory with the wave propagation law of layered media, we can achieve automated construction of viscoelastic artificial boundaries, seismic wave conversion of layered soil, and connection of static and dynamic boundaries. By incorporating the multi-field coupling effect of stress-seepage-dynamics, we can solve the problems of low accuracy and spurious oscillations in existing modeling methods.

Benefits of technology

It improves the accuracy and efficiency of seismic response simulation for pile-supported reinforced embankments, reduces human error, and the output simulation results are highly consistent with the actual engineering situation. It is applicable to pile-supported reinforced embankment projects with different soft soil areas and embankment sizes.

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Abstract

The invention discloses a stratified soft soil roadbed modeling method for pile foundation reinforcement under simulated earthquake action, and belongs to the field of earthquake resistance numerical simulation of geotechnical engineering. According to the method, a multi-field coupling numerical model is constructed based on a finite element platform, a pile-soil and reinforcement-cushion interface contact mechanism is defined, and ground stress balance and initial pore water pressure field construction are completed; a static result is output through soil filling-consolidation coupling analysis, a distributed viscoelastic artificial boundary is automatically constructed by relying on a Python script, and seismic waves are converted into equivalent node loads to be applied in combination with the wave theory; multi-physical field connection of static and dynamic analysis boundaries is achieved, and core response parameters such as embankment settlement and pile-soil stress are solved and output through implicit dynamic analysis. According to the method, the stratified land seismic wave propagation effect is considered, false oscillation generated by static and dynamic boundary conversion is reduced, the simulation precision and efficiency are improved, and the method is suitable for seismic design and analysis of traffic infrastructures in soft soil areas.
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