岩土工程学报2024，Vol.46Issue(z2)：231-235,5.DOI:10.11779/CJGE2024S20029
软土深层调蓄排水管道长期运营累积沉降规律研究
Laws of long-term operation accumulation settlement of deep drainage pipelines in soft soil areas
摘要
Abstract
The deep drainage pipelines experience significant settlement during operation due to the long-term cyclic loading from water filling and discharge,potentially leading to pipe leakage and damage,consequently affecting the normal operation of the deep tunnel drainage system and environmental safety.To address the settlement issue of pipelines in soft soils caused by the long-term cyclic loading from water filling and discharge,a quasi-static finite element method is employed to simulate the stress distribution in the foundation induced by full-flow loads on the pipeline.Based on the layered summation method and empirical formulas for plastic strain and pore pressure accumulation with loading cycles in soft soils,a method for calculating the long-term settlement of the soft soil foundation beneath the pipeline is proposed.This method is used to predict the long-term settlement of the deep pipelines in the Suzhou River section of Shanghai,and the evolution laws of settlement in the pipeline-foundation system under untreated conditions of the bottom foundation are analyzed.The results indicate that due to the low-frequency heavy loading characteristics of water filling and discharge cycles,the settlement induced by the cumulative plastic strain in the foundation soils accounts for the vast majority.In contrast,the consolidation settlement caused by pore pressure dissipation can be almost ignored.The research findings can provide references for the design and operation safety assurance of deep tunnel drainage systems in soft soil areas.关键词
深层/排水管道/长期沉降/循环荷载/经验模型Key words
deep stratum/drainage pipeline/long-term settlement/cyclic loading/empirical model分类
建筑与水利引用本文复制引用
朱麒璇,周维祥,徐柯锋,徐震,朱长根,吕玺琳..软土深层调蓄排水管道长期运营累积沉降规律研究[J].岩土工程学报,2024,46(z2):231-235,5.基金项目
上海市"科技创新行动计划"项目(23692106500) （23692106500）
