沪通长江大桥主航道桥桥塔墩钢沉井定位施工技术

发布时间：2018-01-25 03:41

本文关键词： 公铁两用桥斜拉桥桥塔墩钢沉井锚桩锚碇系统定位技术桥梁施工　出处：《世界桥梁》2017年01期 　论文类型：期刊论文

【摘要】：沪通长江大桥主航道桥为(140+462+1 092+462+140)m双塔连续钢桁梁斜拉桥,28号桥塔墩沉井顶平面尺寸为86.9m×58.7m,钢沉井高50m。为解决钢沉井快速定位、精确着床的难题,采用"锚桩+重力锚"相结合的锚桩锚碇系统进行钢沉井定位施工。锚桩锚碇系统由锚桩、蛙式重力锚、钢丝绳、液压连续千斤顶及张拉控制系统组成,锚桩采用长53m钢管桩,锚固点位于河床面;收缆系统由大直径钢丝绳+钢绞线组成,设置在沉井顶面;主锚绳采用鐖3.5 m的钢桩下端套入鐖110mm的钢丝绳套进行锚固,并设置限位框架防止上滑;采用ANSYS有限元软件建立锚桩锚碇系统模型,得到结构受力及安全满足要求。施工时,采用2台联动APE400振动锤插打锚桩,锚碇抛锚定位后,采用锚桩锚碇系统进行钢沉井过缆、定位及着床施工。实践表明,沉井平面位置和姿态满足设计要求。
[Abstract]:The main waterway bridge of the Hutong Yangtze River Bridge is a cable-stayed bridge with continuous steel truss beams with double towers of 140462 1 092 462 140m. The plane dimension of caisson top of No. 28 bridge tower pier is 86.9 m 脳 58.7 m, and the height of steel caisson is 50 m. The anchoring system is composed of anchor pile, frog gravity anchor, wire rope, hydraulic continuous Jack and tension control system. The Anchorage pile is 53 m long steel pipe pile with anchoring point on the river bed. The cable collecting system is composed of large diameter steel wire rope strands and is arranged on the top surface of the caisson. The main anchor rope is anchored with 110mm wire rope sleeve at the lower end of the pile with 3.5 m steel pile, and the limit frame is set up to prevent the sliding up. The ANSYS finite element software is used to establish the Anchorage system model of Anchorage pile, and the structural force and safety meet the requirements. During the construction, the anchor pile is inserted with two linked APE400 vibration hammers, and the Anchorage is anchored and positioned. The anchor pile Anchorage system is used to carry out the construction of the steel caisson cable, positioning and laying. The practice shows that the plane position and posture of the caisson meet the design requirements.
【作者单位】：中铁大桥局集团有限公司;
【分类号】：U445.557
【正文快照】： 1工程概况沪通铁路沪通长江大桥主航道桥为(140+462+1 092+462+140)m双塔连续钢桁梁斜拉桥,主梁为三主桁结构,桁间距17.5m。主桁采用“N”形桁架,桁高16 m,节点间距14 m[1]。桥塔为钻石形塔,塔高325m。结构体系为塔、梁竖向采用支承体系,纵向采取阻尼器方案。主航道桥采用倒圆

【相似文献】