不同銹蝕度時(shí)海底隧道錨固支護(hù)結(jié)構(gòu)巖錨相互作用分析
發(fā)布時(shí)間:2018-08-02 13:21
【摘要】:基于長(zhǎng)期氯離子侵蝕及干濕交替環(huán)境作用,海底隧道錨固支護(hù)結(jié)構(gòu)發(fā)生錨桿銹蝕,造成支護(hù)結(jié)構(gòu)強(qiáng)度工作性能劣化,結(jié)合某海底隧道Ⅳ級(jí)圍巖錨固支護(hù)結(jié)構(gòu)設(shè)計(jì),基于前人研究理論及試驗(yàn)成果,采用數(shù)值分析軟件FLAC3D并借鑒有限元強(qiáng)度折減思想,分析不同銹蝕程度下隧道的位移、應(yīng)力、塑性區(qū)等影響規(guī)律,探討銹蝕對(duì)錨固支護(hù)結(jié)構(gòu)體系中巖錨相互作用的影響。研究結(jié)果表明:隨著銹蝕度的增加,隧道加錨圍巖區(qū)的位移增大,塑性區(qū)擴(kuò)展,說(shuō)明錨桿銹蝕削弱了錨固支護(hù)結(jié)構(gòu)的整體支護(hù)強(qiáng)度;銹蝕對(duì)隧道加錨圍巖起拱線處的收斂變形影響明顯。錨桿銹蝕降低了錨固支護(hù)結(jié)構(gòu)中巖錨相互作用,銹蝕對(duì)錨固注漿體的黏結(jié)作用的損失影響比對(duì)錨桿應(yīng)力作用的損失影響大。
[Abstract]:Based on the effect of long-term chlorine ion erosion and alternating dry and wet environment, anchor rod corrosion occurs in undersea tunnel Anchorage support structure, which results in the deterioration of strength working performance of supporting structure. Combined with the design of a subsea tunnel grade 鈪,
本文編號(hào):2159568
[Abstract]:Based on the effect of long-term chlorine ion erosion and alternating dry and wet environment, anchor rod corrosion occurs in undersea tunnel Anchorage support structure, which results in the deterioration of strength working performance of supporting structure. Combined with the design of a subsea tunnel grade 鈪,
本文編號(hào):2159568
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