盾構(gòu)下穿流塑狀殘積粉質(zhì)黏土地層擾動規(guī)律研究
發(fā)布時間:2018-10-31 11:57
【摘要】:為了揭示盾構(gòu)下穿流塑狀殘積粉質(zhì)黏土地層擾動規(guī)律,依托長沙市地鐵1號線黃興廣場站~南門口站區(qū)間隧道工程,采用FLAC3D構(gòu)建盾構(gòu)下穿流塑狀殘積粉質(zhì)黏土三維數(shù)值模型,探討盾構(gòu)下穿流塑狀殘積粉質(zhì)黏土地層和加固處理后的地層施工對地表沉降及地層變形規(guī)律的影響。研究結(jié)果表明:盾構(gòu)區(qū)間采用旋噴樁加固時,其地表沉降值及沉降槽寬度相比原狀土區(qū)域(即未經(jīng)過旋噴加固區(qū)域)均有較大幅度的減小。可見,采用旋噴樁加固對流塑狀殘積粉質(zhì)黏土地層加固效果明顯。
[Abstract]:In order to reveal the disturbance law of plastic residual silty clay stratum under shield, relying on the tunnel project between Huangxing Square Station and South Gate Station of Changsha Metro Line 1, a three-dimensional numerical model of plastic residual silty clay under shield tunneling was constructed by FLAC3D. The influence of stratum construction on ground subsidence and formation deformation is discussed in this paper. The results show that the surface settlement and the width of the settlement trough in shield section are significantly reduced compared with those in the undisturbed soil area (i.e. the zone without the reinforcement of rotary jet grouting). Therefore, the reinforcement effect of rotary jet pile on convection plastic residual silty clay is obvious.
【作者單位】: 長沙市軌道交通集團有限公司;中南大學(xué)土木工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(51538009,51578550) 湖南省住建廳資助項目(KY201634)
【分類號】:U455.43
本文編號:2302092
[Abstract]:In order to reveal the disturbance law of plastic residual silty clay stratum under shield, relying on the tunnel project between Huangxing Square Station and South Gate Station of Changsha Metro Line 1, a three-dimensional numerical model of plastic residual silty clay under shield tunneling was constructed by FLAC3D. The influence of stratum construction on ground subsidence and formation deformation is discussed in this paper. The results show that the surface settlement and the width of the settlement trough in shield section are significantly reduced compared with those in the undisturbed soil area (i.e. the zone without the reinforcement of rotary jet grouting). Therefore, the reinforcement effect of rotary jet pile on convection plastic residual silty clay is obvious.
【作者單位】: 長沙市軌道交通集團有限公司;中南大學(xué)土木工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(51538009,51578550) 湖南省住建廳資助項目(KY201634)
【分類號】:U455.43
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