水-热-力耦合的单管冻结理论及其数值模拟

为研究考虑水-热-力耦合的人工冻结的环境效应,保证冻结施工安全,推导了水-热-力耦合的单管冻结理论公式,并将推导公式基于ANASYS软件进行了数值实现,对数值模拟成果进行了对比分析.结果表明:数值模拟冻结壁厚度达1.5 m,径向最大拉应力为0.39 MPa,最大压应力为0.2 MPa,与同条件下实际工程监测结果较为一致;冻结壁最大剪应力为0.36 MPa,最小剪应力为-0.27 MPa;冻胀最大位移达4.15 cm,比同条件下实际工程的监测结果大.数值模型验证了理论公式的有效性,相关结果可为类似工程参考.

Water-heat-stress Coupling Single Pipe Freezing Theory and Its Numerical Simulation

For studying single pipe freezing induced environmental effect with water-heat-stress coupling consideration and ensuring the safety of construction,the theoretical formula of the single pipe freezing with water-heat-stress coupling were deduced,and the derived formula were re-developed with ANASYS numerical software. Then the numerical simulation results were compared and analyzed. It was showed that: the numerical simulated frozen wall thickness was 1.5 m,the max tension stress 0. 39 MPa,and the max compression stres 0. 2 MPa,respectively. The numerical simulated results were well in accordance with the real engineering measured results. The max and the min shearing stress of the freezing wall were 0.36 MPa and-0.27 MPa,respectively. The max freezing displacement was 4.15 cm,which was larger than the real engineering measured result. It was revealed that the numerical simulation was effective and the relevant results could be used by similar projects as reference.