山东建筑大学学报Issue(5)：464-469,6.
济南商埠区历史建筑地下增层工程设计与施工
Project design of adding basement of existing buildings by steel tubular pile underpinning technology
摘要
Abstract
Steel tubular pile underpinning technology is an effective method to develop underground space in retrofitting existing buildings. The stability of the pile under compressed load decreased after the soil around the pile dug. In this paper,the adding basement of Jinan Skin Disease Hospital in commercial port was designed and the stability of the steel tubular piles was studied. The measures of keeping the stability of piles include:installing structural connect components among the piles after certain depth soil dug,limiting the surmount of soil in 1. 5m beside the piles to decrease the soil pressure on the pile,casting cement paste into the gap between the tube and soil after steel tube is inserted in the drill hole. The effective length factor for stability calculation should be based on restricted ability of the pile top edge,free length,pile depth in soil,side and base resistance of pile. The effective length factor for pile stability calculation is 0. 814. The compressive stress of pile is 46. 4 N/ mm2 ,less than the design stress of 215 N/ mm2 .关键词
地下增层/微型钢管桩/托换Key words
adding basement/steel tubular pile/underpinning分类
建筑与水利引用本文复制引用
贾强,张鑫,夏风敏,谭天乐,王继国..济南商埠区历史建筑地下增层工程设计与施工[J].山东建筑大学学报,2014,(5):464-469,6.基金项目
国家自然科学基金项目（51278286）；教育部创新团队项目 （）
