【 Weak current College 】 fire behavior on fire accident investigations---Power By 【 China power house network 】

Fire, police and fire agencies, the primary duty is to put out the fire. Fire fighting, fire accident investigation work has become an important fire agencies. Now, put out the fire and fire accident investigation branch belongs to fire agencies of the two business units, due to the lack of the necessary communication, often because of the fire-fighting personnel in fighting action in a number of inappropriate behavior and to fire accident investigation work difficult. From a practical point of view, mainly in the following two aspects.
　　
First, fire-fighting personnel on fire protection, fire accident investigators to accurately determine the fire site and finds the cause of the fire caused certain difficulties. Fire-fighting personnel is the main fire fighting, its primary mission is to fight fire as soon as possible. But if you just put out the fire, not only protect the scene of the fire, the fire-fighting operations will be on the scene of the fire damage resulting in quite big. There are objective reasons, is inherently destructive fires and fire-fighting is not met in the process and the inevitable destruction. But from the subjective perspective, is the most fire-fighting personnel lack of awareness of on-the-spot protection, not able to consciously protect the fire site, and some people even think in fire-fighting operations in the field cannot be protected, the fire-fighting operations and protect the site against that in fire-fighting operations in blind water and breaking, making ground, walls, ceiling of remnants and traces are washed, the scene of the goods and building change original shape and position, destroyed the fire site. Fire investigators are dependent on the fire site items in the original state after disaster and disaster scene legacy smoked, collapse, traces of carbonation, and fire points of evidence to determine the fire site and finds the cause of the fire. If a field has been destroyed, particularly in the area of the fire damage occurring trace evidence, some with fire cause unrelated items appear in the scene, fire accident investigators to take and fire cause the traces of the screening, filtering out, it is necessary to spend a lot of energy, the increased workload. More importantly this truth as make mixed together, it is possible to make a fire accident investigators fault acknowledge the facts, will give accurate fire investigators to determine the exact location of the fire, finds the cause of the fire caused great difficulties.
　　
Second, in a large number of fires caused by water jet water loss to fire accident investigations and the difficulty of dealing with the aftermath of the work. Fire investigators in statistical fire loss often found: fire burning in the fire directly material losses and not big, and water losses are very large; some even greatly exceeded the fire burning material losses; there's a fire even though only in the place and not spread to other places, but because of the waterlogging and apart from the outside of the Fire Department, a large number of damaged goods. Resulted in excessive water loss due to: a battle in fire-fighting personnel, due to the line of sight is the smoke obscured, see fire point blindly water; the second is in fire fighting, neglect of a building or object of drainage performance, excessive water damage to the building; the third is due to the firefighters did not know the combustion properties of an object or substance, incorrect use of the extinguishing agent. Fire loss approved fire accident investigation is an important part, in accordance with the relevant provisions, water losses were fire direct property losses, but the State water loss how to not explicitly approved. In practice, fire investigators often own on site assessment of the degree of damage to the goods to approved, and real property have great access, which will appear on the approved fire loss is not satisfied with the situation. In addition, because of water loss caused by the increase in the fire party, the parties will as a result of loss compensation of the dispute, sometimes give rise to civil proceedings in the civil litigation process inevitably involves fire agencies recognized by the fire, fire accident liability and approved fire losses often occur because compensation issues and parties on fire agencies recognized by the fire or a fire accident liability apply for certification or to initiate administrative proceedings. That is why, in the event of a multiple fire party, fire investigations in order to avoid future trouble, do not dare dare finds fire cause and finds a fire of unknown origin, which in practical work of the more common.
　　
As the masses legal awareness, on fire accident investigation work requirements are also getting higher and higher. How to protect the fire site, reduce water loss, has become the fire-fighting personnel and researchers must seriously address the issue.
　　
1. fire-fighting personnel to learn and master a certain fire accident investigation of the theoretical knowledge and a clear field of fire protection to reduce the significance of the work. Commanders should always keep a clear head, use of keen observation of the judgment, found in the fire detection and protection in the initial stage of fire sites, fire and combustion traces. The breaking of emergency supplies for the process, the commanders to observe, at any time acquire the fire burning conditions, fire-fighting tactics, in a timely manner to adjust the application of fire-fighting tactics and on-site protection organically, maximum protection of the site to its original state, for the next fire accident investigators for fire investigation work and lay a good foundation. Commanding officer also and fire investigators to timely adopt fire accident investigators.
　　
2. fire-fighting personnel to firmly establish the sense of protection of the scene of the fire, the fire-fighting operations take appropriate protection measures. Fire-fighting personnel is the main fighting action, its behavior is the key to site protection. Fire-fighting personnel in water to make the water flow at the fire, to avoid water direct injection to walls or other objects, so as not to wash off the wall or traces of smoke on objects, or make the walls burst. For some cash, accounts, lists, and important documents of carbonation residues, etc., do not use strong water flow straight, use weak stream or spray water fight. Easy collapse objects, water is to grasp the point of view, to avoid the water flow down objects. In the zheskazgan layer water, water pressure and intensity to moderate, try to keep the ground ashes collapse hierarchy. When you try to stop turning the fire scene stacking things. Save material notes out when piled position, level, quantity, Status, etc., and will focus on areas where things and other sites where something separate, in order to facilitate the restoration of the site. Fire-extinguishing medium do not randomly when it pours, particularly chemical fire extinguishing agent, in order to facilitate the scene some trace chemical extraction and identification of the material evidence. Not particularly need to refrain from breaking or change the location of the goods, especially for action may be the place for fire parts have to be careful not to break up, as far as it has been burned down structure, components, equipment and residues, burning natural state after the object.
　　
III. enhancing fire Scout, selecting the right agent, fire-fighting methods, water consumption, reduce suppression. Some fire smoke concentration, fire-fighting personnel on the scene situation cannot clear cases not blind water fight. First response fire materials storage and set conditions for reconnaissance, and then choose a suitable fire extinguishing agent, avoid mistakes or not. Fighting building internal fire, in the clouds of smoke, water should be as close as possible to the gunman fired district, see through the smoke and fire, the water gun Jet flame spray directly onto the roots, so that the flow of play best efficiency, quickly and effectively fight fire. Strictly forbidden to smoke zone blindly to the water, to minimize fire extinguishing water consumption, with a view to achieve a multiplier effect. If the scene without fear of wet and cream-based substances, according to the burning object, use the appropriate water way-fighting, in reduced yield under reach fire extinguishing purposes. Such as cotton, paper, and other combustible fire advised to use small-caliber gun, spray gun, flowering; application of combustible dust fire fog nozzle to spray dilution, cooling; in extinguishing material stacking fire should be used in spray or flowering Jet number of the fire area is doubled, and fire-fighting water consumption significantly reduced; in ancient architecture, advanced hotel, exhibition halls and other buildings of internal fire, you should use the mist or flowering Jet, decrease water impact, ease of building decoration and Interior goods impregnation and damage. Fire-fighting personnel under different fire objects properly select use reasonably appropriate extinguishing agent in order to achieve the maximum reduction of water losses. For example, when it comes to water and foam fire suppression may, in its discretion, use foam extinguishing because foam with strong adhesion and cover material surface insulation air special properties, you can significantly reduce the fire-fighting water consumption. Fighting lab, computer room, library and archives, electrical equipment, an early stage of fire and extinguishing water if the DC is bound to cause significant water losses, if carbon dioxide, dry powder extinguishing agent such as 1211 or fighting, or fighting with a water flow of atomization, the losses are much smaller. On oil, and other material is not soluble in water, fire extinguishing agent use foam or sand to suffocate the fire. Fire suppression methods incorrectly may result in serious water damage, if not water and other methods of fire suppression, should endeavour to adopt other methods.
　　
IV. prepare materials for evacuation, a proper solution to protect the site and rescue material contradiction, minimizes water loss. In fire fighting expanded at the same time, to organization personnel quickly jishui material evacuation to safety, material cannot be evacuated, tarpaulin, plastic sheet, and so be cloaked. At the same time, to take measures to exclude discharge fire site, and stop the water flow into the fire did not spread to other areas. Fire fight, to accurately investigate fire cause, subject to strict protection, but in part also increase water loss. Therefore, site protection, in line with the principle of reducing losses in fire accident investigators, under the guidance of a reasonable portion of the residual salvaged materials, or use pumps out the fire with water, reduce water losses.
　　
In short, as long as the fire-fighting personnel in fire-fighting operations, to take practical measures to strengthen and fire accident investigators and liaison, well protected site, minimize water loss, fire investigators smoothly fire accident investigations and lay a good foundation.