T型刚构桥两种合拢方案对施工控制的影响

合拢段施工是预应力混凝土T型刚构桥施工的重要环节，关系到全桥的受力和线形状况。以鄱阳县莲湖大桥施工控制为工程背景，探讨了预应力混凝土T构桥合拢施工的影响因素及两种合拢方案对桥梁的累计位移和受力的影响，得出实际使用的合拢方案是合理的并提出施工注意事项，为类似桥梁施工提供了有价值的技术资料。

Influence of the Different Girder Joint Scheme of T Rigid Frame Bridge on Construction Control

The construction of closure segment is an important step in the construction of pre-stressed concrete T rigid frame bridge and could have direct influences on the stressing conditions and geometry of the overall bridge. With reference to the closure segment construction of the main bridge of Poyang Lianhu bridge, this paper studies influences of the construction of closure segment for T rigid frame bridge and analyzed influences of the different girder joint schemes on construction control which include internal force and deformation of the mainspan. The results of studying have the reasonable girder joint schemeand of this bridge and some construction measures are gave, and provide valuable technical reference to the construction of the similar bridges.