Bearing capacity calculation method and system based on large-span tunnel circle layer transmission law

By analyzing the stress transfer law of the tunnel ring layer using a family of confocal parabolas, the difficult problems of stress transfer and bearing capacity calculation of the surrounding rock of flat, ultra-large span tunnels were solved, achieving a safer and more economical tunnel design.

CN120046217BActive Publication Date: 2025-10-17CHINA RAILWAY ENG CONSULTING GRP CO LTD
2 Cites 0 Cited by

Patent Information

Application Number
CN202510057238.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-14
Publication Date
2025-10-17
Estimated Expiration
2045-01-14

AI Technical Summary

Technical Problem

The existing technology lacks a method for calculating the stress transfer law and bearing capacity of the surrounding rock of flat, ultra-large-span tunnels, which makes it impossible to effectively apply the self-bearing design concept of the surrounding rock, affecting the safety and economy of tunnel projects.

Method used

A confocal parabola family is used to analyze the stress transfer law of the tunnel ring. By obtaining the tunnel excavation height, excavation span and effective rock thickness of the arch, the arch belt is divided into multiple layers and a confocal parabola family is constructed. The settlement and bearing capacity of each arch belt are calculated, and finally the total bearing capacity of the tunnel surrounding rock is obtained.

Benefits of technology

It provides a more accurate calculation method for the bearing capacity of tunnel surrounding rock, which is suitable for the design of flat and ultra-large span tunnels, and improves the safety and economy of tunnel projects.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a bearing capacity calculation method and system based on a super-large-span tunnel ring layer transmission rule, relates to the technical field of railway construction, and comprises the following steps: obtaining the excavation height, excavation span and vault effective rock thickness of a super-large-span tunnel; dividing the vault effective rock of the pressure arch into multiple layers of preset-thickness arch zones; constructing a family of confocal parabolas based on the vault height of each layer of arch zone; obtaining the vault settlement of each layer of arch zone under the action of uniform load; and calculating the total bearing capacity of the tunnel surrounding rock bearing arch based on the family of confocal parabolas and the vault settlement. The application analyzes the ring layer stress transmission rule of the super-large-span tunnel through the family of confocal parabolas, and calculates the bearing capacity of the surrounding rock based on the obtained transmission rule, is suitable for the design concept of the self-bearing of the flat super-large-span tunnel surrounding rock, and the calculated bearing capacity can be used for designing a more safe and reliable and more economical and applicable supporting structure, so as to improve the safety and economy of the super-large-span tunnel project.
Need to check novelty before this filing date? Find Prior Art