为深入探究塌陷过程中管土相互作用及埋地管道破坏机理，采用单元生死技术和施加位移荷载技术模拟土体塌陷过程，分别构建考虑管-土非线性效应的耦合模型，分析塌陷下埋地管道的破坏规律。结果表明：管顶管底为控制点，轴向应力为控制应力，非沉陷区和沉陷区交界处与塌陷区中央是危险截面。施加位移荷载技术到单元生死技术，最危险截面出现位置从非沉陷区和沉陷区交界处过渡到塌陷区中央，Von-Mises应力峰值从4.3 MPa增加到6.09 MPa。施加位移荷载技术使得管道下部和土体始终接触，管道在非沉陷区和沉陷区交界处附近受到强剪切作用，而单元生死技术随土体流失，管土状态逐渐由接触到分离是弱剪切作用，Von-Mises应力峰值更大而径向应力更小，更能反映实际情况。根据应力和沉降量值拟合出最大Von-Mises应力预测公式，误差在7%以内。研究结果可为管道安全运行和选择塌陷模拟方式提供参考。

In order to further explore the pipe-soil interaction and the failure mechanism of buried pipelines during the collapse process, the element birth and death technology and the displacement load technology were used to simulate the soil collapse process. The coupling models considering the pipe-soil nonlinear effect were constructed respectively to analyze the failure law of buried pipelines under collapse. The results show that the bottom of the pipe jacking is the control point, the axial stress is the control stress, and the junction of the non-subsidence area and the subsidence area and the center of the subsidence area are dangerous sections. Applying displacement load technology to element birth and death technology, the location of the most dangerous section transitions from the junction of non-subsidence area and subsidence area to the center of subsidence area, and the peak value of Von-Mises stress increases from 4.3 MPa to 6.09 MPa. The application of displacement load technology makes the lower part of the pipeline always in contact with the soil, and the pipeline is subjected to strong shear near the junction of the non-subsidence area and the subsidence area. The element birth and death technology is lost with the soil, and the pipe-soil state gradually changes from contact to separation, which is a weak shear effect. The Von-Mises stress peak is larger and the radial stress is smaller, which can better reflect the actual situation. According to the stress and settlement values, the maximum Von-Mises stress prediction formula is fitted, and the error is within 7%. The research results can provide reference for the safe operation of pipelines and the selection of collapse simulation methods.