综合管廊变形缝抗剪锚筋受力研究

Study on Force of Shear Anchor Bars in Deformation Joint of Utility Tunnels

为了减小综合管廊变形缝处的不均匀沉降,避免综合管廊变形缝过大错动影响综合管廊的正常使用,实际工程中常采用设置抗剪锚筋抵抗错动变形。为了提供综合管廊变形缝设置抗剪锚筋的设计方法所需的理论依据,本文研究了综合管廊沿线典型情况及不同设计参数下抗剪锚筋受力情况。分析结果表明,抗剪锚筋受力随管廊地质条件、节点形式、舱数、宽度、覆土厚度、抗震设防烈度等的变化而变化,设计中应考虑受力的变化规律设置抗剪锚筋。

In order to reduce differential settlement and avoid the dislocation from differential settlement in deformation joint effect the normal use of utility tunnels,shear anchor bars are usually set up to resist this dislocation.In order to provide theoretical basis on design method of shear Anchor bars,multiple special cases and different design parameters of utility tunnels was selected to study the force of shear steel bar under different situations.Research results indicated that the force of shear anchor bars varies with the geological condition,joint Structure,number of cabins,width,covering soil depth,seismic precautionary intensity,etc.In the design,the shear steel bar should be set in consideration of the variety of the force.