临近河道高填方下钻孔灌注桩泥浆稳定液比重控制
Control of Mud Stabilized Liquid Density for Drilling and Grouting Piles under High Fill Areas near River
张峻宾 1陈官正 1罗光能1
作者信息
- 1. 中国水利水电第十四工程局有限公司贵州二堡路项目经理部,贵州 贵阳 550000
- 折叠
摘要
在贵州地区河道地基土中广泛分布着复杂的沉积层,此类土层通常有含水量高、强度低的特点,在此类土层中施工灌注桩基础时孔壁失稳坍塌问题较为突出,一般来说钻孔灌注桩孔壁的稳定性与成桩质量有直接关系,在施工中一般采取控制泥浆比重的办法来平衡地层中的水土压力,维持钻孔灌注桩孔壁稳定.以贵州双龙航空港经济区二堡路特大桥临近河道高填方下的桩基施工为例,分析在该地质条件下泥浆比重控制的要点.
Abstract
Complex sedimentary layers are widely distributed in the foundation soil of river channels in Guizhou region,which usually have the characteristics of high water content and low strength.The problem of hole wall instability and collapse is more prominent when constructing cast-in-place pile foundations in such soil layers.Generally speaking,the stability of the borehole wall of a bored pile is directly related to the quality of the pile.In construction,the method of controlling the mud density is generally adopted to balance the water and soil pressure in the formation and maintain the stability of the borehole wall of the bored pile.Taking the pile foundation construction of the Erbao Road Extra Large Bridge in the economic zone of Shuanglong Airport in Guizhou as an example,this paper analyzes the key points of controlling the mud density under this geological condition near the high fill of the river channel.
关键词
钻孔灌注桩/孔壁稳定性/泥浆/比重控制Key words
bored pile/hole wall stability/mud引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据