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Zhou was photographed at the scene of the bridge collapse accident.
Northeast Network (Weibo) September 19 (Reporter Chen Jing) On the afternoon of June 5438+09, Harbin released the investigation results of the "8.24" third-ring Liqun viaduct ramp overturning accident. The nature of the accident is a serious road traffic accident that the ramp capsized due to serious vehicle overload, and the vehicle fell to the ground, causing casualties.
Harbin reported the accident investigation result: the vehicle was overloaded.
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According to the analysis opinion of the expert group, the inspection conclusion of the inspection agency and the investigation and evidence collection of the investigation team, the direct cause of the overturning of Hongfu Road ramp, vehicle falling to the ground and casualties of the Third Ring Viaduct is that Wang drives an overloaded truck, and Zhang Huibo and Liu are assigned to drive a seriously overloaded vehicle that changes its shape and technical data without authorization, and drive to the right at the same time within the range of1.21.96m long beam, resulting in the unbalanced load on one side of the steel-concrete composite beam.
Indirect cause:
1.On August 24th, Lanling Squadron and Xinxing Squadron of Shuangcheng Traffic Police Brigade did not find any accident vehicles passing through the sections under their jurisdiction.
2. Harbin Highway Management Office did not consider the request of the superior to send law enforcement personnel to reinforce the Wanggang Town section of Jingha Highway Reconstruction Project. Eight law enforcement officers were all transferred from the Shuangchengyang section of Jingha Highway, which led to the omission of road inspection.
3. On August 23rd, dehui city Highway Management Section fined No.2-No.4 vehicles for failing to take unloading measures as required.
Nature of the accident: After obtaining evidence, the accident investigation team determined that the accident was a serious road traffic accident that caused casualties due to serious vehicle overload.
Opinions on accident responsibility identification and handling: the relevant personnel of the accident vehicle shall be transferred to Harbin public security traffic control department for handling according to law. Lanling Squadron, Xinxing Squadron and Harbin Highway Management Office of Shuangcheng Traffic Police Brigade were seriously held accountable by the Municipal Supervision Bureau. For the illegal problems existing in the process of punishing overloaded trucks in the road administration section of dehui city City, Jilin Province, we will submit them to the transportation management department of Heilongjiang Province for notification to Jilin, and investigate and deal with them in accordance with relevant regulations.
Earlier report: The official said that the cost of bridge collapse was 7.09 million yuan, and the structural reform saved 200 million yuan.
Jinghua Times: On the afternoon of August 27th, the Harbin Municipal Government informed the design, construction and supervision units of the collapsed bridge: Harbin Municipal Engineering Design Institute, Fujian Jiao Jian Group Engineering Co., Ltd. and Heilongjiang Baixin Construction Engineering Co., Ltd. ... When interviewed, all three units claimed to operate strictly according to the specifications. According to the news published on the website of Harbin municipal government, the structure of Yangmingtan Bridge was changed, and the concrete structure designed in the original project was changed into steel-concrete structure, which shortened the construction period and saved the steel cost by 200 million yuan.
Announce the information of four trucks
At 5 o'clock on the 24th, a steel-concrete composite beam skidded at the ramp of Honghu Road on the viaduct of the Third Ring Road in Harbin, and four trucks rolled over, resulting in three deaths and five injuries.
On 27th 18: 20, Harbin Municipal Government held the third press conference after the accident. The press conference was still introduced by Huang Yusheng, Secretary General of the municipal government, and there was still no question session.
The meeting lasted five minutes. After the meeting, Wu Xiangyang, commander-in-chief of Yangmingtan Bridge and deputy director of Harbin Construction Committee, was once again "blocked" by the media, but Wu Xiangyang remained silent in the face of doubts.
At the press conference, Huang Yusheng announced the license plates and models of four accident vehicles. From front to back, the serial number is 1-4, of which 1 car black AH3976 is Dongfeng brand heavy warehouse truck. No.2 car Liao M45 170 is a heavy-duty semi-trailer tractor. No.3 car black E52268, Ou Man brand heavy semi-trailer tractor, No.4 car black L82392, Li Hao brand heavy semi-trailer tractor. In terms of the injured, except for 1, the other four people have improved.
The cost of the collapsed ramp is 7.09 million yuan.
At the news conference, Huang Yusheng once again stressed that the collapsed bridge had nothing to do with the Yangmingtan Bridge. The accident site was a separated ramp on the Liequn Viaduct in the Upper Third Ring Road. Beam length 12 1 m, width 9 m and slope 3.5%. It is an independent integral steel-concrete composite beam. Huang Yusheng said that according to relevant engineering data, the ramp project cost is 7,094,200 yuan and the construction period is 90 days.
According to reports, the design unit of the collapsed bridge is Harbin Municipal Engineering Design Institute, and its qualification is Grade A in the municipal industry; The construction unit is Fujian Jiao Jian Group Engineering Co., Ltd. (referred to as Fujian Jiao Jian Group for short), and its qualification is 1 for general contracting of municipal public works and1for general contracting of highway works; The supervision unit is Heilongjiang Baixin Construction Engineering Co., Ltd., and its qualification is Grade A for municipal public works supervision.
Wu Xiangyang said that the name of "Yangmingtan Bridge Relief Project" used by Harbin Construction Committee as the scene of the accident is "General Name".
The reporter inquired about the tender of the project and learned that the total length of the Yangmingtan Bridge relief project is 8.3 kilometers and the planned red line is 70 meters. Among them, the viaduct is 6000 meters long and the road is 2300 meters long, and five pairs of ramps are set on the extension line of the viaduct. The quality of the project requires striving for the Luban Award for high-quality projects, and the construction period is required to be open to traffic before 20 1 1 year/October 3 1. The subsidence area is one of the five ramps.
Expert evidence collection has been completed.
Huang Yusheng introduced that after all seven national experts of the accident appraisal team arrived in Kazakhstan on the evening of 25th, they further investigated the site, and repeatedly checked the measured situation in combination with relevant data such as bridge design, construction standards, pier support, box girder structure and deck quality, and interviewed the design, construction and supervision units successively. At present, on-site inspection, evidence collection and other work have been completed, accounting and verification work is being carried out, and relevant procedures are performed on this basis.
On the 27th, at the scene of the accident, the reporter saw that the collapsed bridge deck and pier were marked with numbers in red paint, with the bridge deck marked with "K 1" to "K 10" and the pier marked with "018".
When to announce the survey results, Wu Xiangyang said, "It depends on experts." .
□ Responses from all parties
& gt& gt design organization
After calculation and design, there is no problem.
On the morning of 27th, Dean Li of Harbin Municipal Engineering Design Institute said that the rescue project for the collapse of Yangmingtan Bridge was designed by their unit, and the engineers were also designed by their unit. Relevant leaders and designers of the design institute have been on the scene, actively cooperating with the investigation of the State Administration of Work Safety and the expert group, and they also hope to draw a conclusion as soon as possible. According to the design drawings and materials at that time, they thought there was no problem in the design through calculation.
According to Director Li, the design institute mainly undertakes municipal projects, mainly key projects in Harbin, and their competent department is Harbin Urban Management Bureau.
It is understood that Harbin Municipal Design Institute has the qualification of designing roads, traffic, bridges and water supply and drainage in Grade A cities, and its business scope also includes sewage and industrial wastewater treatment in Grade A cities, industrial and civil buildings, electrical engineering and engineering survey. There are six professional departments in the hospital, including roads and bridges, water supply and drainage, architecture, landscape architecture, electricity and surveying and mapping, and three management departments, namely, operation department, chief engineer's office and office.
& gt& gt Construction unit
Party A's materials are not outsourced.
The relevant person in charge of Fujian Jiao Jian Group Office confirmed on the 27th that they were the contractors of the collapsed bridge. On the morning of the incident, the company leader and chief engineer immediately went to Harbin. The company also set up an investigation team on this matter.
The person in charge said that the collapsed bridge was not outsourced, but built by the company itself. Construction personnel shall build in strict accordance with the design requirements and construction standards. They are a powerful company and the project is not very big, so it is not too difficult for them. All construction materials shall be provided by Party A. ..
According to its introduction, Jiao Jian Group mainly worked in and around the province before, and participated in the bidding for the relief project of Yangmingtan Bridge in order to expand its business. For the reason of the collapse, he said it was not good to express his position, saying that anyone who is a little more professional will understand.
It is understood that the company has participated in the construction of key projects such as Xiamen Yanwu Bridge, Wuyuan Bridge and Airport Road. The company also won the honors of "demonstration unit of assured project" in 2006-20 1 year, "AAA credit enterprise" in 2009 and "AAA credit enterprise" in 2006-201year.
The supervision company said on the evening of 27th that strict standards will be implemented in the supervision process, but everything will have to wait until the investigation results come out.
□ Investigation
There are many cracks where there is no collapse.
27th 1 1, the scene of the accident has been cleared, leaving only the collapsed bridge lying on the road, and the cordon has been closed a lot. According to the workers, the cleaning work lasted from the evening of 26th to the morning of 27th. Under the main bridge of Liqun viaduct, the workers who have been busy all night are still lying on the ground sleeping, covered with quilts.
Entering the enclosure, the collapse position is located in the middle of the ramp, about 100 meters away from the bottom of the ramp, which is the place connected with Honghu Road. The bridge within this distance is intact, but careful observation shows that there are many cracks on the bridge. According to a rough calculation, there are at least 10 cracks, about 1 m long, and the steel beam in the pier has been pushed out.
Bridge experts say there are many possibilities for cracks. One possibility is the secondary disaster caused by collapse, and the other possibility is that the maintenance is not in place during concrete pouring. For example, insufficient shrinkage will produce cracks.
Save 200 million yuan by restructuring the project.
On the 27th, the reporter found that the government of official website and Harbin issued a document 20 1 1 on September 29th, saying that the whole line of the relief project of Yangmingtan Bridge adopts a composite continuous beam structure composed of eight U-shaped steel beams and reinforced concrete (tóng, meaning concrete). According to the original engineering design, all the decompression projects across the main ground are concrete beam structures. However, due to the practical problems of this structure, such as large engineering quantity, long construction period and difficult quality control, the headquarters organized the design unit to adopt a composite continuous beam structure composed of 8 U-shaped steel beams and reinforced concrete after repeated argumentation and drawing lessons from the advanced bridge structure achievements at home and abroad.
It is also said that the steel beam of the new "composite beam" uses 300 kilograms per square meter, while the steel beam of the conventional closed steel box beam uses 650-750 kilograms per square meter, so it can save more than 300 kilograms of steel per square meter, and eight "U-shaped steel beams" can save about 20,000 tons of steel and save more than 200 million yuan. The installed "U-shaped steel beam" has the characteristics of large bearing capacity, good bridge stiffness and economical cost.
The "U-shaped steel beam" in the disaster relief project is constructed by factory prefabrication and on-site installation. Its manufacturing and processing can be carried out at the same time as the lower concrete foundation, which greatly shortens the construction period and effectively controls the construction quality.
Wu Xiangyang confirmed the above statement.
■ Experts say
Changing structure affects bridge balance
A bridge expert who did not want to be named said that concrete beam structure is concrete structure, and the biggest difference between concrete structure and steel-concrete composite structure (referred to as steel-concrete structure) is that concrete is much heavier than steel in weight. Concrete pouring during the construction period is complicated; The steel structure only needs to be tied, so it saves time.
Experts say that the most important thing in this collapse is balance. Concrete structure is much more stable than steel structure. Because of the different weights, it's like a big man and a thin man standing there. If you push, the big man may not be able to move, and the thin man may fall. The weight is concentrated on one side, not on the other, and the bridge is not balanced enough, so it naturally falls down.
Our reporter Su Xiaoming Intern reporter Wang Mingting