| 地铁隧道单个圆形溶洞地基渐进性破坏模型试验研究 |
| |
| 引用本文： | 杨秀竹,宁业辉,雷金山,张佃仁.地铁隧道单个圆形溶洞地基渐进性破坏模型试验研究[J].长沙铁道学院学报,2013(6):49-53. |
| |
| 作者姓名： | 杨秀竹 宁业辉 雷金山 张佃仁 |
| |
| 作者单位： | 中南大学土木工程学院,湖南长沙410075 |
| |
| 基金项目： | 国家自然科学基金资助项目（51108462）;湖南省发改委批准立项项目（湘发改高技[2012]1493号） |
| |
| 摘 要： | 根据相似理论，设计平面应变模型试验系统，研究地铁隧道存在单个圆形溶洞时，在注浆压力作用下岩溶地基渐进性破坏特点。试验中采用圆柱形气囊模拟注浆压力。对逐级加载过程中土层压力的变化规律进行研究，并对加载过程中土层的位移进行讨论，绘制顶板破坏时的破裂面图。最后，根据相似系数换算成原型值，得到导致地基失稳破坏的极限荷载。
|
| 关 键 词： | 相似模型 溶洞 压力 位移 极限承载力 |
Experimental,study on progressive failure of subway tunnel foundation with a single cave |
| |
| YANG Xiuzhu,NING Yehui,LEI Jinshan,ZHANG Dianren.Experimental,study on progressive failure of subway tunnel foundation with a single cave[J].Journal of Changsha Railway University,2013(6):49-53. |
| |
| Authors: | YANG Xiuzhu NING Yehui LEI Jinshan ZHANG Dianren |
| |
| Affiliation: | (School of Civil Engineering, Central South University, Changsha 410075, China) |
| |
| Abstract: | A plane strain model was designed for research according to the similarity theory, and under the con- sideration of the grouting pressure, the progressive failure characteristics of subway tunnel foundation with a sin- gle karst cave were analyzed. In the experiment, cylindrical airbag was employed to impose a load which simu- lates the grouting pressure. With the method of step - loading, the change law of the soil stress and displacement was discussed and the fracture plane was plotted. Furthermore, the ultimate failure load was derived on the basis of the similarity coefficient. |
| |
| Keywords: | similar model karst cave stress displacement ultimate bearing capacity |
| 本文献已被 维普 等数据库收录！ |
|
