CAJ | 학술논문

泰州大桥采用主跨为1 080 m三塔两跨悬索桥,中塔位于主江中心.通过对沉井基础和高桩承台钻孔桩基础等多项基础方案的比选,考虑到沉井结构受力明确、刚度大、工序简单,经济性高等优点,中塔基础最终选用沉井基础.根据塔柱底的构造要求,受力要求,沉井采用58 m×44 m四角倒圆的矩形沉井,沉井总高76 m.为了能在深水中顺利施工,沉井下部为钢壳混凝土结构,上部为钢筋混凝土结构.文中介绍了泰州大桥水中沉井的结构构造、施工方法、方案比较以及沉井的设计特点,为类似工程起到很好的借鉴作用.
태주대교채용주과위1 080 m삼탑량과현색교,중탑위우주강중심.통과대침정기출화고장승태찬공장기출등다항기출방안적비선,고필도침정결구수력명학、강도대、공서간단,경제성고등우점,중탑기출최종선용침정기출.근거탑주저적구조요구,수력요구,침정채용58 m×44 m사각도원적구형침정,침정총고76 m.위료능재심수중순리시공,침정하부위강각혼응토결구,상부위강근혼응토결구.문중개소료태주대교수중침정적결구구조、시공방법、방안비교이급침정적설계특점,위유사공정기도흔호적차감작용.
Taizhou Bridge is a highway triple-tower and double-span bridge with span arrangement of 1 080 m + 1 080 m, the middle tower is located in the center of Yangtze River. Several proposals are studied for the foundation type of the middle tower, especially the eomparison between caisson foundation and bored pile foun-dation with higher pile cape. The caisson foundation is adopted because of its concise structural behavior, larger ri-gidity and simpler construction procedure, and it's far more economic. According to the configuration requirement of the first section and the structural force, the cross-section of the adopted rectangle caisson's dimension is 58 m × 44 m with four circle chambers at comers, the total depth of the caisson is 76 m. The bottom segment of the cais-son adopts concrete caisson with steel hull, and its upper segment adopts reinforced concrete structure. The struc-tural arrangement, construction method, comparison of the project's proposal and the design feature are introduced in the paper. The design of the caisson foundation will provided good experience for the future similar projects.