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工程力学  2014 

附加应力法在预应力锚杆支护结构稳定性分析中的应用

DOI: 10.6052/j.issn.1000-4750.2012.11.0824, PP. 196-202

Keywords: 边坡,支护结构,预应力,附加应力,稳定性

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Abstract:

对于预应力锚杆支护结构的稳定性分析与计算,尤其是考虑预应力对稳定性的影响时,尚无有效的方法,很少有文献给出有效的定量分析。由大量文献的定性分析可知,锚杆施加的预应力对边坡稳定性的提高起到积极的作用。由于预应力在土体中引起的附加应力,使得土体的应力状态发生改变,从而使边坡的稳定性发生变化,稳定性得到提高。将预应力作为集中力分解为水平分力与竖向分力,估算其在土体中的附加应力,从而分析和计算边坡的稳定性。利用这种计算方法能够体现预应力的加固作用,使预应力锚杆支护结构的稳定性分析更加准确可靠。此外,分析计算表明：锚杆倾角在常用范围,预应力竖向分力的作用可以忽略,只需考虑水平分力的作用,从而使计算简化。方法1方法2方法3方法4方法5方法6

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