湿陷性黄土地区室外电缆沟设计探讨

Discussion on Design of Outdoor Cable Trenches in Collapsible Loess Area

分析室外电气布线形式的选择,对抗震设防烈度为8度及以上区且具有自重湿陷性黄土地区室外电缆沟的选型、检查井的设置、电缆主架层架规格的选定、电缆沟分支段的做法、电缆沟的接地和排水措施进行介绍。通过甘肃省兰州新区某职业院校室外工程电缆沟设计案例的使用效果,表明在抗震设防烈度较大且具有湿陷性的黄土地区室外电气布线中设置C型钢筋混凝土电缆沟是合理可靠的,能有效的保护电缆,减小地基下沉对电缆沟的破坏。

The selection of forms of outdoor electrical wiring is analyzed. The model selection of outdoor cable trenches, the settings of inspection wells, the selection of the specification of body frame of cable, the practice of the branches of cable trenches, and the grounding and drainage measures of cable trenches in the dead-weight collapsible loess areas with 8 degree or above of seismic fortification intensity are introduced. The using effect of the design of the outdoor cable trenches in a vocational college located in Lanzhou New Area, Gansu Province, shows that it is reasonable and reliable to set up C-type reinforced concrete cable trenches in the outdoor electrical wiring of the collapsible loess areas with high seismic fortification intensity, which can protect the cables effectively and reduce the damage of the ground subsidence to the cable trenches.