深水急流裸岩栈桥生根固结逆作法施工技术研究

RESEARCH ON THE CONSTRUCTION TECHNOLOGY OF ROOTING AND CONSOLIDATING REVERSE METHOD FOR DEEP WATER RAPID FLOW BARE ROCK TRESTLE BRIDGE

结合南昌至赣州铁路泰和赣江特大桥栈桥的施工,研究针对邻近既有线、深水急流、裸露基岩并存条件下的栈桥搭设,提出了快速成桥关键技术。研究重点阐述了栈桥管桩生根固结逆作的具体步骤、栈桥成桥工艺及方法。通过现场实际应用,验证了该逆作法具有良好的适用性和操作可靠性,且成桥后稳定性满足施工要求,以期为以后类似环境的栈桥施工提供参考。

According to the construction of Taihe Ganjiang extra-large bridge trestle in Nanchang to Ganzhou Railway,the key technology of rapid bridge construction is proposed in view of the condition of coexistence of adjacent existing lines,deep water rapids and exposed bedrock.The concrete steps of rooting and consolidation of trestle pipe pile,the process and method of trestle bridge formation are emphatically described.Through the practical application,it is verified that the inversion method has good applicability and operational reliability,and the stability of the completed bridge meets the construction requirements,which provides a reference for the future construction of trestle bridge in similar environment.