土钉(喷锚)支护常见事故的原因及对策探讨（Discussion on Causes and Countermeasures of common accidents of soil nailing (shotcrete bolt) support）.doc

土钉(喷锚)支护常见事故的原因及对策探讨（Discussion on Causes and Countermeasures of common accidents of soil nailing (shotcrete bolt) support） Discussion on Causes and Countermeasures of common accidents of soil nailing (shotcrete bolt) support Abstract: Based on 25 soil nailing (anchor) analysis of deep foundation pit engineering accident case supporting, the accident phenomenon to carry on the classification and statistics, combined with the characteristics of the cases reveal the cause of the accident with regularity, and give a description and explanation. At the same time, this paper also introduces the countermeasures and results of Wuhan city to prevent the foundation pit accident. Key words: deep foundation pit; soil nail; shotcrete anchor; accident Excerpt: architectural technology,.2009., Fifth Soil nailing (anchor) support structure does not obstruct the construction of the main slope can play the ability of self unloading, the slope soil can continue drainage and consolidation, which can further improve the stability of the soil and the retaining wall of the spray spray net; net, upper and lower drainage facilities, dewatering well constitute the waterproof protection of the slope soil; embedded slope soil nailing (bolt) can produce anchor tension on the retaining wall, the formation of support [1]. The foundation pit of Fu Hua mansion in Wuhan has been sprayed with anchor support. It has been idle for 8 years, but it has never been dangerous. It is because it has too many advantages and is used too much. In 2005, Wuhan city appeared the peak of frequent accidents of deep foundation pit with soil nail (spray anchor) support. This paper analyzes the accident cases of the foundation pit chosen from 2002 to 2007, and discusses the causes and countermeasures. 1 Foundation Pit Accident engineering in recent years 1.1 case of engineering accident is shown in table 1. 1.2 statistics and explanation of accident cases 14 cases occurred in the old clay geological region, accounting