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钻孔灌注桩技术,因其对各种土层的适当性强、无挤土效应、无震害、无噪音、承载力高等优点,在工程中得到了广泛应用。钻孔灌注桩对于一般粘性土、填土、淤泥质土及砂土等,穿越方便,成孔效果较好,而对于碎石粘土则不宜采用。本文就钻孔灌注桩穿越碎石粘土层的工程实例进行分析,对穿越该类土的设计施工提出一些看法,从而为同类土层中设计钻孔灌注桩时桩端土层的选取提供参考。
Bored pile technology, due to its appropriateness of various soil layers, no soil squeezing effect, no damage, no noise, high carrying capacity, has been widely used in engineering. Bored piles for the general cohesive soil, fill, muddy soil and sand, easy to cross, forming a better effect, and the gravel clay should not be used. This paper analyzes the engineering practice of the bored pile through the gravel clay layer and puts forward some opinions on the design and construction of the bored pile through the soil so as to provide a reference for the selection of the pile end soil layer in the same kind of soil.