【摘要】：為了研究堵漏工程中混凝土封底結(jié)構(gòu)在水荷載、淤砂荷載以及溫度荷載作用下的應力變形情況,進行有限元分析。結(jié)果表明:在茨竹灣水庫庫底巖采用混凝土拱結(jié)構(gòu)進行封底,能夠滿足實際工程需要;各種工況下混凝土封底拱結(jié)構(gòu)變形以及應力分布均勻,未出現(xiàn)應力集中區(qū);沉降量最大出現(xiàn)在封底拱結(jié)構(gòu)中心范圍;最大拉應力主要分布在封底拱結(jié)構(gòu)長軸方向斷面兩端頂部;最大壓應力主要分布在封底拱結(jié)構(gòu)短軸方向斷面兩端底部;拱結(jié)構(gòu)底面到表面為升溫工況將有利于其穩(wěn)定;對封底拱結(jié)構(gòu)軸斷面四周進行針對性加厚處理,以滿足拱結(jié)構(gòu)的應力要求。
[Abstract]:In order to study the stress and deformation of concrete bottom structure under water load, silt load and temperature load, finite element analysis was carried out. The results show that the concrete arch structure can be used to seal the bottom of the reservoir bottom rock of the Tizhuwan Reservoir, which can meet the practical engineering needs, and the deformation and stress distribution of the concrete bottom arch structure is uniform under various working conditions, and no stress concentration zone appears. The maximum settlement occurs in the center of the bottom arch structure, the maximum tensile stress is mainly distributed at the top of the long axial section of the bottom arch structure, the maximum compressive stress is mainly distributed at the bottom of the short axial section of the bottom arch structure. In order to meet the stress requirement of arch structure, the arch structure will be stabilized under the condition of heating from the bottom to the surface, and the circumference of axial section of the bottom arch structure will be thickened accordingly in order to meet the stress requirements of the arch structure.
【作者單位】： 重慶交通大學水利水運工程教育部重點實驗室;重慶交通大學重慶市高校水工建筑物健康診斷技術(shù)與設備工程研究中心;
【基金】：“十二五”國家科技支撐計劃項目(2015BAK09B01) 重慶市基礎與前沿研究計劃項目(重點)(cstc2015jcyjBX0139) 重慶市研究生教育創(chuàng)新基金資助項目(CYS17126)
【分類號】：TV33

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