隧道钻爆掘进振动对附近天然气管道的影响分析

发布时间：2018-06-09 14:06

本文选题：钻爆掘进 + 天然气管道　；参考：《重庆交通大学》2014年硕士论文

【摘要】：近年来，随着我国经济和科学技术的快速发展，土木基础建设的发展也迅速跟进。公路，铁路和城市地下铁路的迅速发展尤为显著。特别是国家西部大开发战略，尤其重视公路、铁路等左右经济发展的基础性建设。隧道开挖是建设公路，铁路和城市地下铁路过程中不可避免的，目前普通隧道开挖掘进的常用方法是经济高效的钻爆掘进法。然而隧道的钻爆掘进振动会对其附近的建（构）筑物造成影响，严重的甚至破坏。振害是隧道钻爆掘进振动的主要危害之一，当工程附近有天然气管道设施时，为保证天然气管道的安全，研究隧道钻爆掘进振动对天燃气管道的影响尤为重要。本文以重庆开县猴子岩隧道为工程实例，，根据工程勘测、工程设计数据、《中华人民共和国石油天然气管道保护法》相关规定和天然气管道相关数据，对监测到的振动数据进行处理和分析，得出萨道夫斯基经验公式，从而对钻爆掘进施工引起的天然气管道振动效应进行科学的预测和预报，来选择科学合理的爆破参数。本文除了查阅国内外相关文献，分析总结已提出的相关理论、经验和科研成果，进行统计和分析外，主要得到下列结论： ①实际工程中最大振速只有一次是1.52cm/s，超过了专家组提出的振速限值，1.5cm/s。根据已经得出的萨氏经验公式，预测1-1图8#点和1-2图3#、4#点爆心距最小时的振速都远小于1.5cm/s，验证了该限制振速的可行性。 ②钻爆振动产生的应力波的传播规律是：其随爆心距增大而衰减，爆心距越小衰减越快；最大振速与爆心距一定程度上表现为乘幂关系；三矢量方向上最大振速在Y向（即径向）出现的频率最高。 ③钻爆振动引起天然气管道的振动主频在Y向（即径向）出现的频率最高；振动主要出现在40～80HZ内。天然气管道的自振频率应避免出现在此范围内。 ④利用统计学的回归分析理论，求出符合实际工程的最佳萨道夫斯基经验公式为： ⑤由求出的萨氏公式预测出1-1图8#点和1-2图3#、4#点单段最大药量为8.8kg时的振速；预测出1-1图8#点和1-2图3#、4#点限定振速值为1.5cm/s时的单段最大装药量。对隧道钻爆施工的设计和实施进行指导。
[Abstract]:In recent years, with the rapid development of China's economy and science and technology, the development of civil infrastructure has followed rapidly. The rapid development of highways, railways and urban underground railways is particularly remarkable. In particular, the strategy of developing western China pays special attention to the basic construction of highway, railway and other economic development. Tunnel excavation is inevitable in the construction of highway, railway and urban underground railway. At present, the common method of tunnel excavation is the economical and efficient drilling and blasting tunneling method. However, the vibration of drilling and blasting tunneling will affect and even destroy the building nearby. Vibration damage is one of the main hazards of tunnel drilling and blasting vibration, when there are natural gas pipeline facilities in the vicinity of the project, In order to ensure the safety of natural gas pipeline, it is particularly important to study the influence of drilling and blasting tunneling vibration on natural gas pipeline. The engineering design data, the relevant regulations of the Oil and Gas Pipeline Protection Law of the people's Republic of China and the related data of the natural gas pipeline are processed and analyzed, and the empirical formula of Sadolski is obtained. Thus, the vibration effect of natural gas pipeline caused by drilling and blasting excavation is scientifically predicted and predicted to select the scientific and reasonable blasting parameters. In addition to consulting the relevant literature at home and abroad, this paper analyzes and summarizes the relevant theories that have been put forward. In addition to the statistics and analysis of the experience and scientific research results, the following conclusions are obtained: (1) in practical engineering, the maximum vibration velocity is only once 1.52cm / s, which exceeds the limit of 1.5cm / s proposed by the expert group. On the basis of the Sartre empirical formula that has been derived, The prediction of vibration velocities of 1-1 plot 8# points and 1-2 figure 3 #ne-point with minimum distance of blasting center is far less than 1.5 cm / s, which verifies the feasibility of limiting the vibration velocity. 2 the propagation law of stress wave generated by drilling blasting vibration is that the attenuation of stress wave decreases with the increase of blasting center distance, and the smaller the blasting center distance is, the faster the attenuation is; To some extent, the relationship between the maximum vibration velocity and the center distance is a power relation. The maximum velocity in the direction of three vectors is the highest in Y direction (i.e. radial direction). 3 the main frequency of natural gas pipeline vibration is the highest in Y direction (i.e. radial direction) caused by drilling blasting vibration, and the vibration mainly occurs in the range of 40,80HZ. The natural vibration frequency of natural gas pipeline should be avoided in this range. The optimum Saadovsky empirical formula in accordance with the actual project is obtained as follows: (5) the vibration velocities of 1-1 plot 8# point and 1-2 figure 3 # point single section maximum dose of 8.8kg are predicted by the calculated Saffolski formula; The maximum charge capacity of single stage is predicted when the defined vibrational velocity of 1-1 diagram 8# point and 1-2 figure 3 #a- point is 1.5cm/s. Guide the design and implementation of tunnel drilling and blasting construction.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TE973;U455.41

【参考文献】