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作 者:肖世国[1]
出 处:《岩土力学》2010年第7期2146-2152,共7页Rock and Soil Mechanics
基 金:四川省交通科技项目(No.sc20070104)
摘 要:h型组合抗滑桩是用横梁连接前后两排桩外形似h型的可抵抗大滑坡推力的支挡结构,分析了h型桩支挡边(滑)坡的作用机理,根据其受力特征,可以滑面为界将其分为上下两个部分计算分析,通过室内试验研究和理论分析,提出可按在滑坡推力作用下的横向弹性地基约束的平面刚架模型分析上半部分(受荷段)结构内力,其间考虑了桩排间的坡体压力作用,在此基础上可对下半部分(锚固段)直接按弹性地基梁理论计算,按所提出的方法设计计算的h型桩成功用于四川广巴高速公路一大型堆积体路堑边坡工程中,取得了良好的实际效果。The h-type combined anti-sliding pile is a retaining structure with a back pile and an corresponding anterior pile firmly connected by a horizontal beam at the top of the anterior pile. The structure is like "h" shape and can resist large landslide thrust. Its anti-sliding mechanism is discussed. According to its mechanical features, the structure can be analyzed by dividing it into two parts in light of the location of potential slip surface. Judging by laboratory test results and corresponding theoretical analysis, it is provided that internal forces of the part above the slip surface can be calculated by plane rigid frame model exerted by landslide thrust in the form of linear load and constrained by lateral elastic strata. In addition, slope pressure between the two piles in the h-type pile is involved in the model. So the other part under the slip surface can be further computed directly by elastic foundation beam theory. The given method is successfully used for designing the structure against a large excavated slope which consists of crushed stone mixed with clay in Guangyuan-Bazhong expressway projects in Sichuan, China. The practical results are reasonable.
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