湿陷性黄土是一种特殊的土质,受水浸湿后由于结构被破坏会发生显著下沉。处于湿陷性黄土地区的工程,由于浸湿程度不同、上部作用荷载不同易发生不均匀沉降。为研究不均匀沉降对离心式压缩机管道的影响,首次通过考虑离心式压缩机基础与管道基础之间的沉降位移差值模拟湿陷性黄土地区的不均匀沉降,利用Caesar Ⅱ软件对离心式压缩机管道进行应力分析，对确定校核工况、调整管道柔性、降低管口荷载的思路都做了详细的描述。通过分析计算,排除了使用膨胀节及可变弹簧的设计方案,最终采用恒力弹簧解决由不均匀沉降导致的离心式压缩机管口荷载超过许用荷载的问题,使离心式压缩机管口所受荷载满足厂家要求。研究结果对地质条件差、存在不均匀沉降的同类离心式压缩机管道的设计具有一定的借鉴意义。

Collapsible loess is a special type of soil, susceptible to significant subsidence due to structural damage when saturated with water. Projects situated in collapsible loess areas are likely to experience uneven settlement as a result of varying moisture absorption and applied surface loads. To explore the impact of this uneven settlement on compressor piping, we initially considered the differential settlement displacement between the compressor and piping foundations, simulating uneven settlement specific to the characteristics of collapsible loess regions. The stress analysis of centrifugal compressor piping was conducted using Caesar II software. This paper provides an in-depth outline of the strategies used in determining verification conditions, adjusting piping flexibility, and minimizing nozzle loads. Through analysis and calculation, the design scheme of using expansion joint and variable spring was ruled out. In conclusion, a constant force spring was implemented to address the issue of exceeding allowable loads on the compressor nozzle due to uneven settlement, thus complying with the manufacturer's specifications. This serves as an invaluable reference for designing similar centrifugal compressor piping systems in areas with challenging geological conditions and uneven settlement.