土-地铁隧道动力相互作用的大型振动台试验——试验结果分析  

A large-scale shaking table test for dynamic soil-metro tunnel interaction: Analysis of test results

作　　者：陈国兴[1] 庄海洋[1] 杜修力[2] 李亮[2] 程绍革[3] 

机构地区：[1]南京工业大学岩土工程研究所,江苏南京210009 [2]北京工业大学建筑工程学院,北京100022 [3]中国建筑科学研究院工程抗震研究所,北京100013

出　　处：《地震工程与工程振动》2007年第1期164-170,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50578076;50508002);江苏省自然科学基金项目(BK2004124);江苏省六大人才高峰项目(2006);南京工业大学博士创新基金项目(BSCX200515)

摘　　要：在进行土-地铁隧道动力相互作用的大型振动台模型试验中,分别测出了模型地基的加速度反应、隧道结构的加速度反应、结构的侧向土压力反应和隧道结构的应变反应。本文首先对模型体系的加速度反应实测值进行整理,分析了模型地基的边界模拟效果、模型地基和隧道结构的加速度反应规律。其次,对模型隧道结构的应变实测结果进行了分析,给出了地铁区间隧道在水平向地震动作用下横截面的应变分布规律,分析了模型箱侧壁与地基土以及隧道结构与土体接触面上的动土压力实测结果及其反应的规律。最后,对试验中模型土的液化现象、地震裂缝和地下结构上浮等震害现象进行了描述。During the test, the acceleration responses of model site and tunnel, the dynamic soil pressures of structure and the strain responses of tunnel are got. In this paper, the simulative effect of boundary is analyzed. It proves that the effect of boundary on the earthquake responses of structure is avoided effectively. At the same time, the rules of the earthquake responses of model system are concluded by analyzing the test results. The strain responses of tunnel are analyzed and the distribution rules of strain in transverse section are given. The dynamic soil pressure in contact surface between soil and model box and between soil and tunnel are also given. At the same time, the liquefaction phenomena of soil are described. Earthquake cracks on ground surface and the rising of structures are detected when the strong ground motions are inputted.

关 键 词：地铁区间隧道 动力相互作用 大型振动台试验 地震反应 

分 类 号：P315.9[天文地球—地震学]