地面爆炸条件下浅埋地下结构物响应的离心模型试验研究  

CENTRIFUGAL MODEL TESTS FOR RESPONSES OF SHALLOW-BURIED UNDERGROUND STRUCTURES UNDER SURFACE BLASTING

作　　者：马立秋[1,2,3] 张建民[2,3] 胡耘[2,3] 张利民[4] 

机构地区：[1]中国核电工程有限公司总图地质所,北京100840 [2]清华大学岩土工程研究所,北京100084 [3]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [4]香港科技大学土木工程系

出　　处：《岩石力学与工程学报》2010年第A02期3672-3678,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)课题(2007CB714108);国家自然科学基金海外及港澳学者合作项目(50828901)

摘　　要：采用清华大学50g-t土工离心机进行浅埋圆形结构物在地表爆炸条件下的试验研究,研究不同炸药量、不同结构物埋深、不同覆盖层材料、不同土层含水量等情况下地下结构物的动力响应。由试验得到如下结论:弹坑抛出物明显受到科氏加速度影响;结构底部应变峰值约为顶部峰值的1/3;土层含水量越大,结构物的应变响应越大;覆盖层材料为砂土时,更有利于结构抗爆。所得结论可为现有结构物抗爆加固和以后地下结构物抗爆设计提供参考。Shallow-buried circular structures under surface blasting were investigated by using Tsinghua University 50 g-t geotechnical centrifuge,and the dynamic responses of structures were studied under the conditions of different explosive charges,different buried depths of structures,different materials of overburden layer and different water contents of soil. The results showed that：（1） The crater ejecta significantly affected by the Coriolis acceleration;（2） The peak strain at the bottom of the structure was about one third of that at the top part; （3） The more water the soil layer contained,the greater the strain response of the structure was;（4） The sandy soil as covering material was helpful to the blast-resistant of structure. These results can provide references to reinforcement of existing structure and design of underground structures.

关 键 词：土力学 地下结构物 地表爆破 离心模型试验 动力响应 

分 类 号：TU41[建筑科学—岩土工程]