关于城市电力电缆隧道的设计探讨

摘要：地下空间是地球上十分宝贵的资源,目前国内外大中城市用地普遍十分短缺,合理开发和综合利用城市地下空间,可缓解城市发展与土地资源紧张的矛盾,提高土地利用率,对于扩大城市生存发展空间具有重要的现实意义,为进一步建设现代化城市开辟了广阔的前景,实现城市的集约化和持续有序化发展。电缆隧道建设是城市地下空间开发利用形式之一, 电缆隧道是能容纳十几条或更多电缆线路的地下土建设施,将电缆线路敷设于已建成的电缆隧道中的安装方式称为电缆隧道敷设。随着城市电力电缆隧道建设的发展，城市电力电缆隧道领域出现了许多新工艺的和更严格的要求。

关键词：城市；地下；电缆；隧道

Abstract: the underground space is the earth very precious resources, both at home and abroad, is a shortage of land for large and medium-sized cities in general, the reasonable exploitation and comprehensive utilization of urban underground space, can alleviate the urban development and the land resource of nervous contradiction, improve the land utilization rate, survival and development space for expanding city has an important practical significance for further construction of modern city opened up broad prospects, realize the city for intensive and orderly development. Cable tunnel construction is the city underground space development and use one of the form, cable tunnel is can hold dozens of or more cable line of civil engineering facilities underground, laying cable line in the completed installation way of cable tunnel called laying cable tunnel. With city power cable tunnel construction development, urban power cable tunnel domain appeared many new technology and more strict requirements.

Key words: the city; Underground; Cable; tunnel

1电缆隧道概况

电缆隧道有圆形、矩形和马蹄形。电缆隧道断面形式主要取决于施工方法,采用盾构法施工的隧道一般为圆形,采用明挖法施工的隧道一般为矩形或马蹄形。在地下走廊十分拥挤的中心城区建造电缆隧道,可以在同一路径敷设多回路高压电缆线路,但电缆隧道建设规划应与城市电网整体建设规划同步进行。一般在以下情况之一应建设电缆隧道:

（1）同一通道的地下电缆数量较多，且受走廊条件限制没有足够空间采用排管或沟槽敷设时，即同一路径35kV电缆超过10根或220kV电缆≥3回路或同一通道敷设6回及以上110kV～500kV的电缆时。