摘要
通过对二次高压灌浆锚杆的灌浆劈裂作用机理及其对提高锚杆承载力作用形式的分析,并结合实际工程的现场原位试验,认识到在富水土层中二次高压灌浆能从根本上改良土体的物理化学性质,在灌浆范围内产生一种新的介质,显著提高了预应力锚杆的承载能力,从而有效控制了基坑支护结构与周边环境的变形。
Through analysis of the grout splitting mechanics of second high pressure grouting soil anchor and the action form on raising the carrying capacity of soil anchor, based on the field test of pre-stressed soil anchor. The paper recognizes that the high pressure grouting technique can reform the physical and chemical property of soil radically,bring about a new medium within range of grouting in soil layer full of water to raise the beating capacity of the pre-stressed soil anchor and control the deformation of supporting structure and surrounding building in foundation pit.
出处
《低温建筑技术》
2009年第7期89-92,共4页
Low Temperature Architecture Technology
基金
黑龙江省教育厅资助项目(11521255)
哈尔滨市科技局资助项目(2008RFQXS109)
关键词
基坑
土层锚杆
二次高压灌浆
承载力
foundation pit
soil anchor
second high pressure grouting
carrying capacity
