深中通道组合结构沉管管节混凝土浇筑变形分析
摘要：深中通道隧道段采用钢壳-混凝土组合结构沉管,因其断面宽度较大,浇筑混凝土时引起的顶板下挠变形成为施工的主要控制指标。为此,建立板壳-实体有限元模型,考虑混凝土弹性模量、水化热温度随时间的变化,对浇筑全过程进行模拟分析。结果表明:结构主要变形为顶板下挠、侧墙顶部内收,分别为顶板净跨的5.4/10 000,侧墙高度的6.7/10 000;与不考虑混凝土水化热相比,水化热导致的顶板竖向变形占总变形的61.5%,水化热对结构变形的影响不容忽视。
关键词：沉管隧道组合结构混凝土浇筑变形数值模拟
尊敬的用户，本篇文章需要20元，点击支付交费后阅读
限时优惠福利：领取VIP会员
全年期刊、VIP视频免费!
全年期刊、VIP视频免费!
参考文献[1] 宋神友,李永轩,金文良,等．钢-混凝土组合沉管结构抗剪机理[J]．同济大学学报(自然科学版),2019,47 (10):1421-1428．
[2] LI Y X,SONG S Y,LIU Y Q.Steel web effects on shear mechanism of steel shell-concrete composite structure[J].Engineering Structure,2020,225．
[3] KIMURA H,KOJIMA I,MORITAKA H.Development of sandwich-structure submerged tunnel tube production method[J].Nippon Steel Technical Report,2007,86:86-93．
[4] LIEW J Y R,YAN J B,HUANG Z Y.Steel-concrete-steel sandwich composite structures-recent innovations[J].Journal of constructional steel research,2017,130:202-221．
[5] 小岛朗史,城代高明,中島由貴,等．港島トンネル鋼サンドイッチ構二造沈埋函の高流動コンクリートの施工[J]．コンクリート工学,1996,34 (8):21-28．
[6] 玉井昭治,池田泰敏,阿部哲良,等．海上に浮遊している沈埋函への高流動コンクリートの適用-那覇沈埋函(3号函)製作工事[J]．コンクリート工学,2003,41 (7):60-65．
[7] CEB-FIP.CEB-FIP Model Code (2010)[M].Lausanne,Switzerland,2012.
[2] LI Y X,SONG S Y,LIU Y Q.Steel web effects on shear mechanism of steel shell-concrete composite structure[J].Engineering Structure,2020,225．
[3] KIMURA H,KOJIMA I,MORITAKA H.Development of sandwich-structure submerged tunnel tube production method[J].Nippon Steel Technical Report,2007,86:86-93．
[4] LIEW J Y R,YAN J B,HUANG Z Y.Steel-concrete-steel sandwich composite structures-recent innovations[J].Journal of constructional steel research,2017,130:202-221．
[5] 小岛朗史,城代高明,中島由貴,等．港島トンネル鋼サンドイッチ構二造沈埋函の高流動コンクリートの施工[J]．コンクリート工学,1996,34 (8):21-28．
[6] 玉井昭治,池田泰敏,阿部哲良,等．海上に浮遊している沈埋函への高流動コンクリートの適用-那覇沈埋函(3号函)製作工事[J]．コンクリート工学,2003,41 (7):60-65．
[7] CEB-FIP.CEB-FIP Model Code (2010)[M].Lausanne,Switzerland,2012.
Concrete Gasting Deformation Analysis of Steel Shell-concrete Composite Immersed Tunnel Element in Shenzhen-Zhongshan Link
Abstract: The steel shell-concrete composite structure is adopted in the immersed tunnel of ShenzhenZhongshan Link. With the large width of cross section,the deflection of the roof caused by pouring concrete has become the main control index for construction. Therefore,a shell-solid finite element model of the whole immersed tube element was established,considering the concrete elastic modulus and hydration heat temperature during the whole concrete casting process. The results show that the main deformation of structure is the deflection in the middle of roof slab and inward deformation at the top end of side walls,which are 5. 4/10 000 of the span of the roof slab and 6. 7/10 000 of the side wall height,respectively. Compared with not considering the hydration heat,the deflection of the roof slab cased by hydration heat accounts for 61. 5% of the total deflection. The influence of hydration heat on the structural deformation should not be ignored.
Keywords: immersed tunnel; composite structure; concrete; casting; deformation; simulation
950
0
0