Original Title: Hexin Railway Construction Materials "Charged with Sales" Safety Hidden Lifthri
Source: Economic Reference Journal
Elastic cushion is an important material for railway rail construction, and its quality is directly related to the stability of railway operation.Recently, the "Economic Reference Daily" reporter found at the construction site of the Hexin Railway (Hefei to Xinyi) that many construction units saved costs to save the "Sanyuan E -Cemon Elastic Cushion" in violation of the rules.The "regenerative glue imitation products" that do not meet the standards of the railway industry, these imitation products are far lower than design requirements, and there are hidden safety hazards.
The elastic cushion that should have been "full of toughness"
In the middle, the rail panel is laid on the base plate of the road base or bridge base. The limited groove device is the connector of the base plate and the rail board. The elastic cushion is one of the key materials for the limit groove device.Rail board displacement caused by the impact of the train at high speed.
At the construction site of multiple bid sections of the new railway, the reporters unannounced visitor found that the elastic cushion that has been laid in the restricted groove device, there is "open as soon as it is cut", ""The abnormal phenomenon of disconnection" is broken.
At the construction site, the reporter found that the sticky elastic cushion was "open" and "broken".Reporter Cheng Zilong
The construction site of China Railway Seven Bureau: Under the eye-catching promotional slogan, the reporter found that the elastic cushion used was unqualified.Reporter Cheng Zilong
On October 26, the reporter came to the construction site of the third bidding section of the Hexin Railway Station of the Hexin Railway Station under the China Railway Third Bureau, and at the "Cross Ningluo Expressway Bridge14 "In the logo position, the reporter randomly pulled out a few newly paved elastic cushions from the limited groove, and gently cut it with a wallpaper knife.The cut part is pulled, and the stretch of stretching is broken.
Subsequently, the reporter came to the construction site of the 4th standard section of the Hexin Railway Station project in charge of the construction of the China Railway Seventh Bureau (the point information was DK226+130.985 DK226+219.125), and used it.The above measures test the elastic cushion just paved, and as a result, the phenomenon of "cut it as soon as it is cut, and it is broken".At this site, you can see the slogan of "grid management, penetrating supervision, and allowing hidden safety hazards to be available".Ironically, a large number of unqualified elastic cushions are scattered near the slogan.
On October 29th, the reporter came to the construction site of the 5th bidding section of the Hexin Railway Station of the Hexin Railway Station of the China Railway 1st Bureau (the first five calibration of the Hexin Railway Station No. 1 Special Bridge143#pier west of about 200 meters), an elastic cushion that is being used was collected. After confirming with the on -site construction staff, the elastic cushion sampled by the reporter was the same as the elastic cushion that was paved to a limited groove.Later, the reporter conducted a pull test and found that the elastic cushion was still "cut" and "broken as soon as it was cut."
The elastic cushion used is far lower than industry standards
Some people in the industry revealed to reporters: ThoseThe reporters investigation found that the elastic cushion of "open" and "broken", the raw materials are mainly "regenerative glue", not the "three yuan meter Cubi rubber" required by the railway industry standards; those elastic cushions are seriously seriousUnqualified products cannot adapt to the impact of "high strength, high speed" of the train.
my countrys railway construction has high requirements for the quality of elastic cushion. "Floor" (q/CR6-2014)], railway-free rail rubber elastic cushion cushion layer, "elastic cushion raw materials should be used for triangular ethylene rubber, and other glue species and regeneration glue should not be used."
< P ID = "35OR7P6S"> At the same time, this standard has strict requirements for 13 indicators such as "stretching strength" and "stretching and elongation" of elastic cushion, of which: "Stretch strength (MPA) is ≥12" The elongation of the stretch is ≥250%. "According to the "Guidance Book of Non -Rail Orbiting Operations" in the 7th Bureau of the China Railway: (in the restricted groove device) elastic cushion raw materials shall be adoptedOther glue and regeneration glue.
The reporter will send the elastic cushion collected from the construction site of the new railway to the authoritative testing agency for testing. The result shows that the main raw materials for the elastic cushion for inspection are regenerative glue, not a regenerative glue, not it is notSanyuan ethylene rubber; its stretching strength (MPA) is only 1.327, and the stretching rate is only 101%, which is far lower than the "≥12" and "≥250%" of the standard requirements.
The material "fills the secondary" hidden safety hazards
Although the formal elastic cushion produced with "Sanyuan Ethyl Ciber" is not large, there is a large gap in quality.
The reporter used the genuine Sanyuan ethylem elastic cushion to do cutting and pulling experiments. It obviously felt that its rebound elasticity and low deformation were obvious.The knife is difficult to cut. Even if it is cut with a lot of energy, it is difficult to tear the cutting part with the hand, which is more difficult to break it.
Industry insiders said that the imitation products produced with "regenerative glue" are very different from the price of the Sanyuan E -C -elastic cushion.The price is about 1/4 of the Sanyuan e -A.
For the elastic cushion used in construction, there are problems such as "charging good". The reporter interviewed the construction unit of the above -mentioned multiple sections.
Qu Weiming, Secretary of the Secretary of the Discipline Inspection Commission of the Four -standard Project Manager of the Anhui Section Station of the China Railway Seventh Bureau, told reporters: "Cant steal (work), and it cannot be reduced (expected to be expected (expected) ".""> Wei Lei, the manager of the five standard project managers of the first five standard projects of the China Railway 1st Bureau Hexin Railway Station, told reporters: There is no" good charge "and other conditions;After the inspection, lets check again.Interview.
Experts from Beijing Jiaotong University engaged in railway engineering research told reporters that in the railway rail structure, elastic cushion is one of the key materials for limited grooves.The stability of the high -speed operation of the train. If the elastic cushion performance is far lower than the design requirements, the hidden safety hazards will inevitably be buried.
