Risk Prevention And Control Of Construction Damage Gas Pipe Network Based On Soil Vibration

In recent years,the construction of the land gas pipe network in China has been increasing,and the problem of network safety is brought new challenges because of the frequent increase of construction activities.At present,there has been a number of gas pipeline leakage accidents caused by construction damage,which makes the risk of the construction of the gas pipeline in the prevention and control of gas pipelines into the focus of the urban public safety work.Monitoring of the construction scene and state can effectively prevent such explosive accidents,but there is a lot of construction in the cities.Therefore,how to effectively monitor the construction and how to choose the appropriate monitoring point have been of significance and practical.In this thesis,a new model of construction risk prevention and control based on soil vibration is discussed.The feasibility of vibration monitoring is investigated by building a full-scale experimental platform for multi-scene and multi-state monitoring of common construction machinery.At the same time,a third-party construction site risk assessment scheme is established based on a risk analysis and assessment approach to guide the selection of third-party construction sites where vibration monitoring should be carried out.Main work and achievements are summarized as follows:Firstly,through the collection and finishing of the construction damage accidents in recent years,the vibration wave source of the construction area was mainly for environmental noise,mechanical walking,crusher and excavator.Based on the characteristics of the propagation characteristics of the soil,the two kinds of monitoring equipment were selected,the characteristics of the core element sensor of the equipment were analyzed in detail,and the different types of monitoring equipment were designed by the field,and the different mechanical type multi-state experiment scheme was developed,and the various vibration monitoring equipment was used to carry out the whole size experiment of the various vibration monitoring equipment and obtain the experimental data.Subsequently,the principle of the FFT-DFT algorithm used for construction damage monitoring data analysis was described,and a combination of Linear Predictive Coding methods and Discrete Fourier Transform algorithms was chosen to collect data from full-scale mechanical experiments on site.The study found that,mechanical walking and operation have different peak distribution.Mechanical walking road surface and electronic boundary pillar placement point are both the best conditions for concrete road surface,while in the conditions of both mud road surface,10 m away from the monitoring ability has been greatly reduced,the worst effect.When the excavator to carry out operations,when the mechanical and electronic boundary pillar is in the same muddy road surface,the monitoring effect is the best,the monitoring distance is about 10 m or less.The effective monitoring distance of the crusher operation is 35 m.And the performance of the monitoring electronic boundary pillars was also compared in terms of strengths and weaknesses,and it was found that the level of electronic boundary pillar No.01 and electronic boundary pillar No.02 is similar,with the latter being slightly stronger.In order to realize the focus monitoring of high-risk construction points,the research on the selection method of monitoring site was studied,and the method of placing the place of the two kinds of application was obtained.One was to apply to the monitoring point selection method based on the gas pipeline and construction destruction of the construction area,which would be based on the risk display value in the evaluation area,and the site of the electronic boundary pile was selected according to the risk of construction.The second was the method of monitoring point selection based on the gas pipeline and construction damage of the construction damage,which was based on the risk value of the construction of the gas pipeline,and the site was selected according to the risk risk.Finally,using the Hefei Metro Safety Protection Zone as an example,a construction risk prevention and control system based on soil vibration was established based on the research results,and the feasibility and popularization of the model was verified.Figure[63] Table[29] Reference[77]...