Channel maintainability dredging construction safety risk multi-level evaluation method

Abstract

The invention discloses a channel maintainability dredging construction safety risk multi-level evaluation method comprising the following steps: obtaining channel maintainability dredging construction risk factors, and building a risk evaluation index system; carrying out first-level single-factor risk index evaluation; carrying out the MTU weighted summation and carrying out second-level personnel safety risk evaluation, and obtaining a personnel safety risk value p and a grade thereof; carrying out the variable-weight weighted summation and second-level ship equipment safety risk evaluation, and obtaining a ship equipment safety risk value s and the level of the ship equipment safety risk value s; performing second-level environmental safety risk evaluation by a variable-weight gray clustering method, and obtaining an environmental safety risk value e and a level thereof; carrying out the PSE weighted summation and second-level management type security risk evaluation, and obtaininga management type security risk value m and a level thereof; and converting the management risk value into three types of risk management coefficients, and carrying out third-level comprehensive security risk evaluation. According to the invention, safe dredging construction of navigation channel maintainability can be ensured.

Description

technical field [0001] The invention relates to the technical field of safety risk assessment of waterway maintenance dredging construction, in particular to a multi-level evaluation method for safety risk of waterway maintenance dredging construction. Background technique [0002] Channel maintenance dredging is an engineering measure that must be taken to ensure the smooth flow of the channel. Due to the continuous navigation of the channel during the construction period, it is difficult to control construction safety risks, and the tonnage of ships in high-grade channels is large. Once a safety accident occurs, the economic loss will be serious. It is urgent to make a safety assessment of the channel maintenance dredging construction to guide risk control and reduce safety incidents. and economic loss. [0003] However, the maintenance dredging construction system is complex. From the perspective of safety system engineering, the channel maintenance dredging construction...

AI Technical Summary

Problems solved by technology

For the safety risk assessment of waterway navigation, the risk assessment is often only carried out on the external environment (waterway conditions, natural hydrological environment, etc.), and little is involved in the safety risk of the complex system of waterway maintenance dredging construction.

[0005] Traditional safety assessment methods (such as Preliminary Hazard Analysis (PHA), Failure Mode, Effects and Hazard Analysis (FMECA), Hazard and Operability Study (HAZOP), Fault Tree Analysis, Event Tree Analysis, etc.) are mainly based on On the basis of probability analysis, because the probability of relevant events in complex systems is often difficult to determine, quantitative analysis based on traditional methods is not very operable under uncertain conditions

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