防灾减灾工程学报2025，Vol.45Issue(2)：468-476,9.DOI:10.13409/j.cnki.jdpme.20230824002
隧道工程中电解减饱和处理的振动台试验研究
Study on Shaking Table Tests of Electrolytic Desaturation Treatment for Tunnel Engineering
摘要
Abstract
Tunnel engineering projects are particularly vulnerable to seismic liquefaction hazards due to their long spans.In this study,researchers propose an electrolytic desaturation method based on the principle that reducing foundation saturation improves liquefaction resistance.For cut-and-cover tunnel projects in deep liquefiable sandy soil foundations,shaking table model tests were conducted to evalu-ate the reinforcement performance of the electrolytic desaturation method.Additionally,the soil accel-eration around the tunnel,pore pressure variation,and tunnel uplift displacement were monitored.The test results showed that the electrolytic desaturation method provided excellent anti-liquefaction reinforcement performance,significantly restraining the uplift of tunnel structures.Pore pressure varia-tion was the key factor affecting liquefaction occurrence.After the electrolysis of saturated sandy soils,a significant reduction in excess pore pressure was observed.Compared with the untreated condition,two conditions with different electrolytic treatments achieved maximum reductions of 68.1%and 70.3%in peak excess pore pressure.The positions of maximum reductions were all located at the bot-tom of the tunnel model,and the anode-cathode arrangement had a certain effect on both desaturation efficiency and anti-liquefaction performance.Both electrolytic treatments reduced the maximum uplift displacement of the tunnel model compared to the untreated condition,with reduction amplitudes ex-ceeding 35%.The research findings demonstrate that the electrolytic desaturation method effectively controls the uplift deformation of tunnel structures in liquefiable foundations.关键词
隧道工程/电解减饱和法/振动台试验/超静孔压/上浮变形Key words
tunnel engineering/electrolytic desaturation method/shaking table test/excess pore pres-sure/uplift deformation分类
建筑与水利引用本文复制引用
刘建华..隧道工程中电解减饱和处理的振动台试验研究[J].防灾减灾工程学报,2025,45(2):468-476,9.基金项目
国家自然科学基金项目(52179101,51679072)资助 （52179101,51679072）
