Water level reciprocating lifting and lowering loess tunnel surrounding rock pressure prediction method and system

By conducting triaxial compression tests and numerical simulations on the surrounding rock of loess tunnels, the dry-wet cycle process and predicted pressure of the surrounding rock under different working conditions were obtained. This solved the problem that the influence of repeated rises and falls of water level on the surrounding rock pressure was not considered, and improved the accuracy of surrounding rock pressure prediction.

CN122452269APending Publication Date: 2026-07-24SHAANXI WATER CONSERVANCY & ELECTRIC POWER SURVEY & DESIGN INSTITUTE (GROUP) CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI WATER CONSERVANCY & ELECTRIC POWER SURVEY & DESIGN INSTITUTE (GROUP) CO LTD
Filing Date
2026-06-25
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies fail to effectively consider the impact of fluctuating water levels on the surrounding rock pressure of loess tunnels, resulting in inaccurate predictions of surrounding rock pressure and making them unsuitable for predicting the surrounding rock pressure of hydraulic tunnels in water-rich loess strata.

Method used

By conducting triaxial compression tests on multiple samples of surrounding rock in loess tunnels under different wet-dry cycles, the mapping relationship between shear strength index and wet-dry cycle number was obtained. Combined with numerical simulation, the wet-dry cycle process and predicted pressure of surrounding rock under different working conditions were determined, and the Protodyakonov theoretical formula was improved to enhance prediction accuracy.

Benefits of technology

It improves the accuracy of surrounding rock pressure prediction, is applicable to water-rich loess strata, and provides scientific and comprehensive support for the construction and operation of loess tunnels.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122452269A_ABST
    Figure CN122452269A_ABST
Patent Text Reader

Abstract

The application discloses a loess tunnel surrounding rock pressure prediction method and system, and belongs to the technical field of tunnel construction, which can solve the problem that the prior art cannot be applied to the surrounding rock pressure prediction in water-rich loess stratum. The method comprises the following steps: performing triaxial compression tests on multiple samples of the soil body of the loess tunnel surrounding rock under different dry-wet cycle times; determining a first mapping relationship between the shear strength index of the soil body and the dry-wet cycle times and a second mapping relationship between the vertical strain of the soil body, the vertical test pressure and the dry-wet cycle times according to the test data; performing numerical simulation on the dry-wet cycle process of the loess tunnel surrounding rock under different working conditions based on the first mapping relationship and the second mapping relationship, so as to obtain the surrounding rock simulation pressure before and after the dry-wet cycle of different times under each working condition; and determining the surrounding rock prediction pressure after the dry-wet cycle of different times under each working condition according to the surrounding rock simulation pressure. The application is used for predicting the surrounding rock pressure.
Need to check novelty before this filing date? Find Prior Art