华中科技大学学报（自然科学版）2024，Vol.52Issue(12)：168-177,10.DOI:10.13245/j.hust.241220
浅埋盾构不同掘进角度端头土压力的统一解
Unified solution of end earth pressure of shallow buried shield at different driving angles
摘要
Abstract
Based on the limit equilibrium theory,a 3D wedge-shaped sliding block analysis model was established for the average earth pressure at the end of different tunneling directions.The initial position of the sliding surface extending to the surface was set at the horizontal plane where the two sides of the tunnel were located.The relationship between the two sides of the tunnel was established between the geometric size of the sliding block and the tunneling direction β.Based on the stress analysis of the soil above and below the shield vault,the equilibrium equation was established,and the uniform solution of the average earth pressure at the end considering the heading direction β was obtained.By comparing with the existing research results of earth pressure at the end of horizontal shield,the rationality of the research idea and the established model was verified.Results show that the soil pressure at the end of shield is closely related to tunneling angle,diameter,buried depth and shear strength.Under a certain depth condition,when the radius of the shield decreases to a certain degree,or when the tunnel is driven downward(β＜0°),when the tunneling angle and shear strength indexes are met,the earth pressure at the end of the shield will disappear,and the soil at the end of the shield is naturally stable.关键词
浅埋盾构/楔形体/极限平衡/端头土压力/掘进角度Key words
shallow buried shield/wedge/limiting equilibrium/end earth pressure/driving angle分类
建筑与水利引用本文复制引用
肖尊群,邓名慧,郑俊杰,林健..浅埋盾构不同掘进角度端头土压力的统一解[J].华中科技大学学报（自然科学版）,2024,52(12):168-177,10.基金项目
国家自然科学基金资助项目(51678267) （51678267）
武汉工程大学第十五届研究生教育创新基金资助项目(CX2023193). （CX2023193）
