如何有效控制由于盾构法施工引起地层损失导致的沉降是目前研究的关键问题。以常州地铁二号线一期工程穿越河流的实际情况为例,结合ABAQUS对盾构下穿河流施工沉降进行数值模拟分析,研究盾构法在富水粉砂地层中穿越河流减小沉降的方法,...如何有效控制由于盾构法施工引起地层损失导致的沉降是目前研究的关键问题。以常州地铁二号线一期工程穿越河流的实际情况为例,结合ABAQUS对盾构下穿河流施工沉降进行数值模拟分析,研究盾构法在富水粉砂地层中穿越河流减小沉降的方法,结果表明,控制切口水压在1.14~1.19 kPa内,采用壁后注浆工艺,二次补压浆时每环推进4.2~5.8 m 3,且洞门接口管片采用刚度较大的铸铁环时,沉降能够得到有效控制,确保盾构隧道穿越河流施工安全。所得结论可为盾构下穿河流施工给予一定的参考。展开更多
A consistent focus in theoretical mechanics has been on how to apply Lagrange's equation to continuum mechanics.This paper uses the concept of a variational derivative and its laws of operation to investigate the ...A consistent focus in theoretical mechanics has been on how to apply Lagrange's equation to continuum mechanics.This paper uses the concept of a variational derivative and its laws of operation to investigate the derivation of Lagrange's equation,which is then applied to nonlinear elasto-dynamics.In accordance with the work-energy principle and the energy conservation law,kinetic and potential energies are proposed for rigid-elastic coupling dynamics,whose governing equation is established by manipulating Lagrange's equation.In addition,case studies are used to demonstrate the application of the proposed method to spacecraft dynamics.展开更多
文摘如何有效控制由于盾构法施工引起地层损失导致的沉降是目前研究的关键问题。以常州地铁二号线一期工程穿越河流的实际情况为例,结合ABAQUS对盾构下穿河流施工沉降进行数值模拟分析,研究盾构法在富水粉砂地层中穿越河流减小沉降的方法,结果表明,控制切口水压在1.14~1.19 kPa内,采用壁后注浆工艺,二次补压浆时每环推进4.2~5.8 m 3,且洞门接口管片采用刚度较大的铸铁环时,沉降能够得到有效控制,确保盾构隧道穿越河流施工安全。所得结论可为盾构下穿河流施工给予一定的参考。
基金supported by the National Natural Science Foundation of China(Grant No.10272034)
文摘A consistent focus in theoretical mechanics has been on how to apply Lagrange's equation to continuum mechanics.This paper uses the concept of a variational derivative and its laws of operation to investigate the derivation of Lagrange's equation,which is then applied to nonlinear elasto-dynamics.In accordance with the work-energy principle and the energy conservation law,kinetic and potential energies are proposed for rigid-elastic coupling dynamics,whose governing equation is established by manipulating Lagrange's equation.In addition,case studies are used to demonstrate the application of the proposed method to spacecraft dynamics.
