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| 沉管隧道基槽爆破施工对既有堤岸稳定性影响的数值仿真分析 | |
| 引用本文： | 张玉成,杨光华,姜燕,姚捷,史永胜.沉管隧道基槽爆破施工对既有堤岸稳定性影响的数值仿真分析[J].岩土力学,2010,31(Z1):349-356. |
| 作者姓名： | 张玉成 杨光华 姜燕 姚捷 史永胜 |
| 作者单位： | 1. 武汉大学,土木建筑工程学院,武汉,4300721;广东省水利水电科学研究院,广州,510610;中国建筑第三工程局有限公司,武汉,430070 2. 武汉大学,土木建筑工程学院,武汉,4300721;广东省水利水电科学研究院,广州,510610 3. 广东省水利水电科学研究院,广州,510610 4. 武汉大学,土木建筑工程学院,武汉,4300721 |
| 摘 要： | 结合爆破数值模拟中爆破荷载的特点,分析了各种荷载施加方法的特点及爆破震动场模拟的要求,基于圣维南荷载等效原理,提出了爆破荷载的等效施加方法,即将作用在炮孔壁上的爆破荷载等效后,施加在同排炮孔中心线或者面上来模拟爆破荷载的作用。结果表明,等效施加方法在近区存在一定差异,但在中远区吻合得较好。利用该等效荷载施加方法,采用三维实体模型计算分析了某沉管隧道基槽爆破施工对既有堤岸稳定性影响,计算了周围不同位置、不同深度位置处的振动响应,并在此基础上,分析研究了减小爆破振动对既有结构物影响的减振措施,可为类似工程提供借鉴。 |
| 关 键 词： | 爆破 等效荷载 既有堤岸 稳定性 数值仿真 |
| 收稿时间： | 2010-04-13 |
Numerical simulation analysis of influence of blasting construction of foundation trench of immersed tunnel on stability of embankment |
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| ZHANG Yu-cheng,YANG Guang-hua,JIANG Yan,YAO Jie,SHI Yong-sheng.Numerical simulation analysis of influence of blasting construction of foundation trench of immersed tunnel on stability of embankment[J].Rock and Soil Mechanics,2010,31(Z1):349-356. | |
| Authors: | ZHANG Yu-cheng YANG Guang-hua JIANG Yan YAO Jie SHI Yong-sheng |
| Institution: | 1. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China; 2. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China; 3. The Third Chinese Bureau of Construction Wuhan 430070, China |
| Abstract: | The characteristics of load application and the demands of blasting vibration are analyzed; and the equivalent load application method is proposed based on Saint-Venant principle, that is getting blasting loads equivalent first, then applying the equivalent loads to the line or area of centers of the same blast hole row, in order to simulate blasting load8]. The results of numerical calculation show that the equivalent method has differences in the vicinity but better fit in further zone. With this equivalent method, the influence of blasting construction of foundation trench of immersed tunnel on the stability of embankment is calculated and analyzed by three-dimensional solid numerical model; the vibratory responses of different positions and different depths are calculated; and based on this, vibration reducing measures are also researched in order to reduce the influence of blasting vibration on existing constructions, so as to provide a reference for similar projects. |
| Keywords: | blast equivalent load existing foundation trench stability simulationblast equivalent load existing foundation trench stability simulation |
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