摘要
应用弹性力学Mindlin解建立了双圆盾构掘进引起土体附加应力积分表达式。运用复化Gauss-Legendre数值积分公式,定量分析了双圆盾构正面推力、盾构与土体侧摩阻力对土体扰动的程度及范围。分析表明,双圆盾构掘进对土体扰动具有区域性特征,盾构机上部表现为背土挤土,侧面则表现为挤压剪切效应,并且侧摩阻力对土体的扰动程度更大。所得结论对于双圆盾构穿越临近地下管线或建筑物桩基的施工提供理论依据。
The additional stresses induced by propulsion of double-o-tube（DOT） shield are calculated by means of the Mindlin’s equations in elasticity.The characteristics of additional stresses and the extent of soil disturbance of DOT shield construction are analyzed with compound Gauss-Legendre integral arithmetic.In the analysis,the excess earth pressure and the lateral friction between shield skin with surrounding soil are taken into account.The outcome makes clear that the soil disturbance of DOT shield has the regional characters,such as drag and extrusion above the sea-gulled segment and extrusion and friction lateral of the shield skin.The lateral friction has more effect on soil disturbance than the excess earth pressure.The conclusion can be as reference for the traversing construction nearby the underground pipeline and the building foundation for DOT shield.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第8期2246-2251,共6页
Rock and Soil Mechanics
关键词
双圆盾构
正面推力
侧摩阻力
施工扰动
附加应力
DOT shield
excess earth pressure
lateral friction
soil disturbance
additional stress
