黄陵矿业集团矿工公寓楼基坑支护工程设计

Foundation pit support engineering design for the miners’ apartment building of Huangling Mining Group

摘要:

黄陵矿业集团矿工公寓楼基坑设计开挖深度837 m。南侧安全等级为一级，不具备放坡条件，设计采用排桩+预应力锚索格构支护方案；东、西、北三侧区段安全等级为二级，具备放坡条件，设计采用放坡+土钉墙支护方案；采用坑外管井降水+坑内集水明排组合降水方法。介绍了不同支护方案和降水方案的设计情况，同时介绍了土钉墙、支护桩、预应力锚索、降水井及观测井的施工技术要求。

Abstract:

The foundation pit support for the miners’ apartment building of Huangling Mining Group is designed with the excavation depth of 8.37m. Since the security level for the south side is classified as the first grade, and slope grading is not permitted, the soldier pile + prestressed anchor grid is designed for support. For the east, west and north sections, the security level is classified as the second grade, and sloping is permitted; thus, slope grading+the soil nail wall support is designed for support. For dewatering, tube wells outside the pit is combined with the water ditch collection and drainage in the pit. The design of different support and dewatering plans are introduced. At the same time, the construction specifications for soil nailing walls, support piles, prestressed anchor cables, dewatering wells and observation wells are introduced.