盾构法隧道开挖面稳定性下的多目标优化研究
Multi-objective Optimization Based on the Stability of Shield Tunnel Excavation Surface
陈阳 1刘文 2刘文黎 1陈阳阳1
作者信息
- 1. 华中科技大学土木与水利工程学院,武汉 430074
- 2. 中交第二航务工程局有限公司,武汉 430074
- 折叠
摘要
盾构法隧道开挖过程中开挖面稳定性保持非常重要,开挖面稳定性下提升工程进度、保障工程质量等目标具有重要的工程意义.目前,针对开挖面稳定性下的多目标优化控制的研究不足.选择掘进效率作为工程进度的指标,选择掘进过程引起的最大地表沉降作为工程质量指标.采用分层序列法和NSGA-Ⅱ多目标优化算法,将盾构开挖面稳定作为第一层优化目标,工程进度与工程质量作为第二层优化目标,研究盾构开挖面稳定下多目标优化.在一段连续穿越堤坝、空地、敏感建筑三个场景的施工隧道中应用本研究方法,结果表明,优化后的盾构推力维持在上下限区间内,提高了施工效率和减少了地表沉降.本文方法能够根据实际工况自适应的调整和优化控制策略,提高了在实际工程中的适应性和灵活性.为类似盾构隧道工程提供了参考和指导.
Abstract
Ensuring stability of the excavation surface when using the shield method during tunnel excavation is crucial to achieve engineering goals related to project progress and quality.Insufficient research has been conducted on multi-objective optimal control when considering excavation surface stability.The excavation efficiency was selected as the indicator of project progress and the maxi-mum ground settlement resulting from shield tunnelling activities was selected as the indicator of project quality.The stratified sequen-cing method and NSGA-Ⅱ multi-objective optimization algorithm were used to explore multi-objective optimization pertaining to shield excavation surface stability.The research sets the shield excavation surface stability as the first layer objective and the project progress,and project quality as the second layer objectives.The technique was implemented in a construction tunnel segment that traverses em-bankment,open area,and sensitive building areas indefinitely.The findings demonstrate that the refined shield pressure remains with-in the upper and lower boundary thresholds,thereby boosting construction efficacy and mitigating max ground settlement.This approach enables the refinement and optimization of control strategies in response to prevailing working conditions adaptively,enhancing adapta-bility and flexibility.It also offers guidance and serves as a point of reference for similar shield tunnel projects.
关键词
盾构法隧道/分层序列法/多目标优化/开挖面稳定性/掘进效率/地表沉降Key words
shield tunneling construction/stratified sequencing method/multi-objective optimization/excavation surface stability/tunneling efficiency/surface settlement引用本文复制引用
基金项目
国家自然科学基金重大项目(52192664)
国家自然科学基金面上项目(72171094)
出版年
2024
NETL
NSTL
万方数据