A Method for Estimating the Damage Range of Surrounding Buildings Caused by Natural Gas Pipeline Explosion
A technology for natural gas pipelines and physical explosions, which is applied in the field of estimating the damage range of natural gas pipelines to surrounding buildings due to physical explosions, and can solve problems that have not yet been seen.
Active Publication Date: 2020-07-28
PETROCHINA WEST PIPELINE CO +1
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Problems solved by technology
[0004] At present, there is no technical scheme to use the calculation method of natural gas pipeline physical explosion energy, the calculation method of high-pressure gas physical explosion shock wave overpressure, the peak attenuation of seismic wave particle velocity, and the estimation of the damage range of natural gas pipeline physical explosion to surrounding buildings.
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Embodiment
[0032] Step 1: Relevant data collection:
[0033] The initial data collection includes: pipe outer diameter d, wall thickness h, initial gas pressure P in the pipe 1 , gas adiabatic index γ, atmospheric pressure P 0 , pipe buried depth H 1 , Covering soil density ρ s , Opening width L under the pipeline laying ditch 1 , upper opening width L 2 , Overburden throwing height H 2 The basic data; and based on this estimate the initial line physical explosion energy E of the pipe body li ;
[0034] Step 2: The concept and estimation of line physical explosion energy of high-pressure natural gas in the pipe:
[0035] a. The natural gas pipeline is simulated as a cylindrical container with equal cross-section and infinite length, and the physical explosion energy per unit length of the pipe body is used to define the line physical explosion energy of the pipe body per unit length; it is calculated using known thermodynamic process calculation methods The physical explosion ene...
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The invention discloses a comprehensive estimation method for the damage extent of the surrounding buildings from a natural gas pipeline physical explosion. The method takes into account the extents of two hazard effects on the buildings of both the physical explosion shock wave of a natural gas pipeline and the explosion seismic wave of the natural gas pipeline. The comprehensive estimation method includes an estimation method for the physical explosion shock wave attenuation law and peak overpressure of the natural gas pipeline, a classification method for the influence degree on the buildings from the physical explosion shock wave of the natural gas pipeline, and an estimation method for the peak of particle motion velocity generated from the explosion seismic wave of the natural gas pipeline; and meanwhile, by using the above methods to estimate, the parameters are obtained to work out the classification of the damage extent on the surrounding buildings from the physical explosion shock wave of the high-pressure natural gas pipeline. The comprehensive estimation method has the advantages of safety, reliability, strong adaptability, applicability for multi-type natural gas pipelines, good versatility, simplicity and ease of use; moreover, the method can realize the estimation of influence extent from the physical explosion seismic wave of the natural gas pipeline in different directions, and has a good application prospect.
Description
technical field [0001] The invention belongs to the field of pipeline explosion research and testing, and in particular relates to a method for estimating the range of damage to surrounding buildings caused by natural gas pipeline physical explosions. Background technique [0002] As an efficient and clean energy source, natural gas is favored by all countries. It is estimated that in the next 10 years, my country's economic development and residents' demand for natural gas will show a physical explosive growth. Because natural gas pipelines are affected by nearby construction behavior, environmental corrosion, mechanical or material failure, natural disasters and other unknown factors, physical explosion cracking accidents occur from time to time, causing serious damage to surrounding buildings. When a high-pressure natural gas pipeline bursts, under the action of a gas pressure as high as 10-15MPa in the pipeline, the initial crack of the pipeline will show a macroscopic ...
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IPC IPC(8): G06F30/13G06F30/20G06F113/14
CPCG06F30/13G06F30/20G06F2113/14
Inventor 刘剑马华原程良玉龙源毛益明谢萍杨明尚臣林小飞
Owner PETROCHINA WEST PIPELINE CO