桩锚与土钉墙联合支护土钉轴力监测  

Monitoring of Axial Force along Soil Nails in the Composite Support Structure with the plie-anchor and Soil Nailing Wall

作　　者：马平[1] 孙强[1] 秦四清[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《工程勘察》2008年第1期20-22,共3页Geotechnical Investigation & Surveying

基　　金：国家重点基础研究(973)项目资助(编号:2002CB412702)

摘　　要：根据现场实测数据,分析了桩锚与土钉墙联合支护中上部土钉墙土钉轴力的变化规律,发展了基坑联合支护设计理念,为联合支护设计理论研究积累了试验数据。下部桩锚支护部分土体开挖会影响上部土钉墙稳定性,造成上部土体中应力发生转移,土钉轴力相对下部土体开挖前有显著增大。在桩锚与土钉墙联合支护设计中,上部土钉墙的设计必需考虑下部桩锚支护部分土体开挖的影响。Based on the field testing data, the change nile for the axial force of the soil nailing in the composite support structure with the pile-anchor and soil nailing wall is analyzed. The monitoring results of axial force along soil nails in the support structure prove that the excavation of the lower part soils supported with the pileanchor structure affects the stability of the upper soil nailing wall, which results in the transfer of the stress in the upper soils and the increase of the axial force. The effect should be taken into account during the design for the upper soil nailing wall in the composite support structure.

关 键 词：深基坑 联合支护结构 土钉墙 锚杆 

分 类 号：TU473.14[建筑科学—结构工程]