A Vibration Velocity Prediction Method for Static Blasting of Foundation Pit Adjacent to Structures

A technology of static blasting and structures, applied in the field of construction, can solve the problems of long calculation period, failure to meet the requirements of on-site construction, and high quality requirements of calculation personnel, and achieve the effect of reducing the workload of on-site prediction, reducing the cost of prediction, and speeding up the construction progress

A technology of static blasting and structures, applied in the field of construction, can solve the problems of long calculation period, failure to meet the requirements of on-site construction, and high quality requirements of calculation personnel, and achieve the effect of reducing the workload of on-site prediction, reducing the cost of prediction, and speeding up the construction progress

CN108399296BActive Publication Date: 2020-04-21DALIAN MARITIME UNIVERSITY
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  • A Vibration Velocity Prediction Method for Static Blasting of Foundation Pit Adjacent to Structures
  • A Vibration Velocity Prediction Method for Static Blasting of Foundation Pit Adjacent to Structures
  • A Vibration Velocity Prediction Method for Static Blasting of Foundation Pit Adjacent to Structures

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Embodiment Construction

[0038] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] A vibration velocity prediction method for static blasting of a foundation pit adjacent to structures or pipelines, comprising the following steps:

[0040] Step S1: Determine the value range of parameters, the parameters include geological strength index GSI, rock hardness m i , the degree of rock disturbance D, the amount of charge G and the distance d between the charge hole and the adjacent structure or pipeline.

[0041] Geological strength index GSI, rock hardness degree m i , The upper and lower bounds of rock disturbance degree D can be obtained according to relevant geological survey reports or query design manuals. The upper and lower bounds of the charge amount G and the distance d between the charge hole and the adjacent structure or pipeline are determined according to the requirements of the construction site....

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Abstract

The invention discloses a vibration speed prediction method for foundation pit static blasting close to structures. The method includes: adopting a genetic neural network to predict vibration speed ina static blasting influence range, to be more specific, taking GSI (geological strength index), rock hardness degree mi, rock disturbing degree D, explosive load G and distance b between explosive load holes and nearby structures or pipelines as input parameters, acquiring sample input parameter distribution on the basis of an orthogonal design principle, and adopting a TNT equivalent method forequivalence of a liquid carbon dioxide rock breaking device into a TNT explosive model to further adopt LS-DYNA software for calculating to generate sample output parameters, adopting a training sample set to train the genetic neural network to obtain a mapping relation between the input parameters and the output parameters, and adopting the mapping relation to realize practical vibration speed prediction in engineering.

Description

technical field [0001] The invention relates to the field of construction, and more specifically, to a vibration velocity prediction method for static blasting of foundation pits adjacent to structures. Background technique [0002] When the excavation process of foundation pit encounters high rock face and hard rock formation, it is necessary to use blasting excavation to remove the hard rock. The traditional blasting method is a special operation, which requires a professional team and strict approval. The construction cost is high and it has great harm to the surrounding environment. In addition, the excavation of urban foundation pits is close to existing buildings and underground pipelines. The use of blasting excavation will inevitably affect them, and in severe cases, it will cause loss of personnel and property. [0003] Liquid carbon dioxide blasting technology is a new blasting technology, which uses liquid carbon dioxide to rapidly gasify and expand when heated a...

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Application Information

Patent Timeline
21 Apr 2020
Publication
CN108399296B
IPC
G06F30/23; G06N3/00; G06N3/08
CPC
G06F30/23; G06N3/006; G06N3/084
Inventors
许梦飞; 姜谙男