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关键词：隧道施工 ； 事故隐患分析； 安全工程设计 ；隧道通风设计
A tunnel construction accident hidden danger analysis and safety engineering design
The Specification of the Design:Tunnel construction in our country, the number is increasing, there is an upward trend in accident, accident influence more and more get the attention of people and attention. For the tunnel construction accidents, therefore, is necessary to analysis and security engineering design and application value.
Relative to other building construction, the tunnel construction more unsafe environment factors, there are more accidents. This design in view of the shanghai-chengdu national highway trunk feeder (GZ55-1) pad to jiang LinShui highway tunnel construction project design and calculation, the tunnel has a stand-up tunneling distance long, complex geological structure, rock Angle gently and joint development, has a broken fault zone, mined-out area and dust concentration is larger. This design through on-site field investigation, from the state of a person's risk of unsafe behavior, as well as defects in management three aspects has carried on the construction site accident hidden danger to the tunnel, effectively solve the accident hidden trouble existing in the tunnel construction problems. For the tunnel construction has strong applied value.
This design by listing the accident cases in the tunnel construction in recent years, and for the reason of the accident analysis, concluded that the major construction accidents in tunnel construction. Adopted the beforehand risk analysis and risk analysis two kinds of operation condition analysis method of tunnel construction accidents that exist in the analysis of accidents, the accident hidden danger level is obtained and the corresponding control and prevention measures. Finding out the main existing in the tunnel construction accidents, the accident hidden trouble existing in the retaining structure has poor ventilation, damage caused by landslides, electricity facilities aging, hot work caused by the fire, blasting operation caused by explosion and hole transport caused by the accident. Through calculation analysis of one of the highest degree of danger is poor ventilation, and the second is the supporting structure. So the primary accident hidden danger existing in the tunnel construction ventilation problems. This design using the professional safety evaluation method and the conclusion of the tunnel construction and tunnel construction has certain reference significance to other.
Design the third chapter of main accidents according to the second chapter carries on the corresponding security engineering design, the conclusion of the construction ventilation problems due to the second chapter first for the tunnel construction safety hidden trouble, so considering the safety of the tunnel ventilation engineering design, this design USES the design basis are: the ministry of railways railway tunnel construction standard TB10204-2002, the \"specification for design of highway tunnel ventilation and lighting JTJ026.1-1999 specification for design of heating ventilation and air conditioning, GB50019-2003, the\" ventilation and air conditioning engineering quality inspection evaluation standard \"GBJ304-88, the\" technical specification for construction of highway tunnel JTG F60-2009, etc., design based on the above is about ventilation design specifications issued by the state, this design in the design of fully reference the specification, and has carried on the selection of related parameters makes the source of the parameter is more convincing. Design of the ventilation scheme comparison, according to \"economic and reasonable\" and \"technology\" principle, identified within 1000 m pressed into the ventilation methods, adopted in 1000 m - 1650 - m hybrid ventilation method. And has carried on the tunnel ventilation rate calculation, according to the calculation of wind pressure system, obtained within 1000 m to choose air volume is 1650 m3 / min, wind pressure is 2000 pa of axial fan, ventilation pipe diameter is 1.5 m; 1000 m - 1650 m between air volume of 2912 m3 / min, when air pressure is 5000 pa axial fan and power is 37 kw hybrid ventilation fan, ventilation pipe diameter is 1.8 m. In addition, this design also use CAD drawing software rendering the tunnel ventilation piping layout diagram, mark the placement of the fan, the duct diameter of the main parameters, such as authenticated proves the rationality and operability of this design. Finally summed up the tunnel construction ventilation safety engineering design, have some practical experience in design.
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