微桩型复合土钉在深基坑支护工程的应用

New Use of Minisize Pile with Composed Soil-nailing in Deep Foundation Pit

深基坑支护工程中,土钉墙以适应性强、价格低廉等优点得到了很大应用。但变形较大的弱点使其受到限制。以北京某深基坑为实例,采用了微桩型复合土钉支护,即微型桩和土钉、预应力锚杆联合的复合支护结构,对其设计施工做了详细介绍。施工的监测资料表明:工程稳定可靠,满足工程要求,且降低了工程造价。可做为同类基坑设计的参考。

Soil-nailing wall is widely used in deep foundation pit for its flexibility and cheapness. This article introduces an example which used minisize pile with soil-nailing and pre-stress anchor. All the design and construction are particularly detailed. The measure data shows the project is steady and the distortion fulfills the safety of the buildings around. This can be consulted by design of the alike deep foundation pit.