地震时饱和砂土地基中管线上浮机理及抗震措施试验研究  

Experimental study on the uplift behavior of pipeline in saturated sand foundation and earthquake resistant measures during an earthquake

作　　者：邹德高[1] 孔宪京[1] Ling H.I. 朱彤[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]哥伦比亚大学土木工程与力学系

出　　处：《岩土工程学报》2002年第3期323-326,共4页Chinese Journal of Geotechnical Engineering

基　　金：高等学校博士点专项科研基金资助项目 (1 9990 1 4 1 2 6)

摘　　要：采用模型试验技术 ,证实了地震中由于地基的液化使管线上方的填土抗剪强度降低 ,浅埋在饱和砂土下的管线“上浮”到地表 ,最终导致管线破坏 ;通过类比试验的方法 ,着重研究了地震时砂土地基的加速度反应、振动孔隙水压力的产生消散过程、管线的上浮机理、多种排水 (或加固 )措施的抗震效果 ,为进一步的深入研究。In this paper, by the technique of model test, it is verified that during an earthquake the shear strength of backfill soil diminishes because of liquefaction, therefore pipelines that are buried at shallow depth and submerged in water 'float' to the ground surface and lead to failure. The acceleration and excess pore water pressure response behaviors of soil foundations, the uplift mechanism of pipeline, the effectiveness of different types of drainage or reinforcement measures are studied by analogy method. The study suggested that additional research is needed and the experimental results presented are useful for validation of numerical analysis procedure.

关 键 词：地震 饱和砂土地基 管线 抗震 超孔隙水压力 排水 加固 

分 类 号：TU441.4[建筑科学—岩土工程]