水文地质工程地质2026，Vol.53Issue(1)：217-229,13.DOI:10.16030/j.heg.202406057
盾构隧道穿越岩溶地层安全距离预测模型
Prediction model of safe distance for shield tunnel crossing karst strata
谯殿君 1郑宇 1吕显州 1李桂源 1李嘉诚 2孙捷城3
作者信息
- 1. 山东科技大学地球科学与工程学院,山东青岛 266590
- 2. 山东科技大学地球科学与工程学院,山东青岛 266590||临沂市知行交通规划设计有限公司,山东临沂 276055
- 3. 济南轨道交通集团有限公司,山东济南 250013
- 折叠
摘要
Abstract
Shield tunneling through complex karst formations presents significant engineering challenges due to construction-induced disturbances,which markedly increase the risk of excessive ground settlement and localized collapses.These phenomena pose serious threats to the safety and stability of tunneling operations.For the shield tunnel section between Tangye Station and Chengjiazhuang Station of Jinan Metro Line 4,numerical simulation methods were employed to analyze the evolution of the surrounding rock displacement field and plastic zone when the tunnel crosses karst caves above and laterally.Regression analysis was conducted on the simulation results.Based on the principle of plastic zone penetration,orthogonal experimental schemes considering three factors(surrounding rock grade,tunnel burial depth,and karst cave diameter)were developed to establish predictive models for the safe distance between karst caves and tunnels for both overhead and lateral crossings.The results indicate that when the tunnel crosses a karst cave overhead,as the distance between the cave and tunnel increases,the uplift at the tunnel invert increases,the settlement at the tunnel crown decreases,the horizontal displacements at the left and right tunnel haunches diminish,and the trend of plastic zone penetration weakens.When the tunnel crosses a karst cave laterally,with increasing distance between the cave and tunnel,the settlement at the tunnel crown decreases,the horizontal displacement at the tunnel haunch on the side closer to the cave diminishes,and the trend of plastic zone penetration also weakens.The safe distance between karst caves and tunnels increases with each factor.The extent of influence of different factors is ranked as follows:karst cave diameter＞surrounding rock grade＞tunnel burial depth.Through theoretical analysis and predictive models,reinforcement measures should be implemented within a 5 m radius below and a 3 m radius laterally of the shield tunnel section between Tangye Station and Chengjiazhuang Station.This study provides a theoretical basis for reinforcing the surrounding rock of the shield tunnel section crossing karst formations on Jinan Metro Line 4,which is of great significance for guiding on-site construction of similar strata.关键词
盾构隧道/围岩变形/岩溶地层/安全距离/数值模拟/正交试验Key words
shield tunnel/surrounding rock deformation/karst strata/safety distance/numerical simulation/orthogonal experiment分类
天文与地球科学引用本文复制引用
谯殿君,郑宇,吕显州,李桂源,李嘉诚,孙捷城..盾构隧道穿越岩溶地层安全距离预测模型[J].水文地质工程地质,2026,53(1):217-229,13.
