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土钉支护结构作为一种新的支护结构正在越来越广泛的应用于深基坑工程中在土钉设计及施工中,界于土钉与预应力锚杆之间,经常在土钉施加少量的预拉力。本文结合数值分析普通土钉与少量预应力土钉支护的基坑位移及应力,锚杆应力应变来分析预应力在土钉支护中的位移及开挖控制效应。并就土钉支护的设计和施工中提出了几点看法,强调施工监测和信息化施工在土钉支护应用中的重要性。
Soil nailing support structure as a new support structure is more and more widely used in deep foundation pit engineering design and construction of soil nails, between the soil nail and prestressed anchor, often in the soil nail Apply a small amount of pre-tension. In this paper, the displacement and stress of foundation pit and the stress and strain of rock bolt are analyzed by numerical analysis of common soil nail and a small amount of prestressed soil nailing to analyze the displacement and excavation control effect of prestress in soil nailing. And puts forward some opinions on the design and construction of soil nailing support, emphasizing the importance of construction monitoring and information construction in the application of soil nailing.