地下综合管廊地震响应及影响因素分析研究

Seismic Response of Underground Pipe Gallery and Influence Factors Analysis

城市地下综合管廊和传统的地铁隧道不同,在管廊建设线路中会涉及到舱室数量变化,地质条件的改变也会导致管廊埋深和接触面性质发生变化。而且我国是一个多地震的国家,综合管廊抗震设计已经得到越来越多的关注。虽然其动力特性研究取得了丰富成果,但鉴于不同区域的土体性质各异,土体和结构非线性效应明显且动力相互作用复杂,因此仍有研究的必要性。以北京新机场综合管廊工程为背景,结合现场工程地质资料,采用ABAQUS有限元软件,建立不同舱室、不同埋深的二维管廊数值模型,研究管廊线路中舱室数量及形状、埋深、地震波峰值加速度大小以及横波与纵波的不同耦合方式对管廊地震响应的影响,并提出管廊结构优化设计方法及建议。

Different from the traditional subway tunnel, the number of warehouses will be changed in the process of construction of the pipe gallery. The change of geological conditions will also lead to the change of the buried depth of the utility tunnel and the property of the contact surface. Moreover, China is an earthquake-prone country, and the seismic design of pipe gallery has received more and more attention. Although the research on its dynamic characteristics has obtained abundant achievements, the soil properties in different regions are quite different, and the nonlinear effect of soil and pipe gallery are obvious and the dynamic interaction is complex, it is still necessary to study their seismic response. With the utility tunnel project of Beijing new airport as the background, based on the field engineering geological data and ABAQUS finite element software, a two-dimensional underground pipe gallery numerical model with different warehouses and buried depths is established. The effects of the number and shape of warehouses, buried depth, peak acceleration of seismic wave and different coupling modes of S-wave and P-wave on the seismic response of underground pipe gallery are studied, and the optimization design method and suggestions of underground pipe gallery structure are proposed.