The third Qianjiang Bridge (Xixing Bridge) started construction in February 1993 and was opened to traffic in February 10/997.
The current management unit of Qianjiang Third Bridge is Hangzhou Hengji Qianjiang Third Bridge Co., Ltd., which was designed by Tongji University and built by Hangzhou Transportation Bureau. During the construction period, it was the time when Zhao Zhanqi, the former director of Zhejiang Provincial Communications Department, served as the director of Hangzhou Transportation. In 2007, Zhao Zhanqi was sentenced for accepting bribes.
The main bridge was built by Hunan Road and Bridge Construction Group. Prior to this, the company built several bridges, such as Fenghuang and Jiujiang, all of which had serious collapse accidents. Yesterday, Hunan Road and Bridge Construction Group Company issued an urgent notice, saying that it had nothing to do with the collapse accident of the south approach bridge of Qianjiang Third Bridge, in which the main bridge1280m was the construction tender, which was undertaken by them; The north-south elevated approach bridge is 4420 meters, which is constructed by other construction units. They have contacted the owner of the bridge and confirmed that this section was built by a construction unit in Zhejiang.
According to CCTV reports, there are as many as 10 construction units involved in the construction of the approach bridge of the third Qianjiang Bridge, including Zhejiang Hydropower Construction Group. However, which unit built the collapsed south approach bridge, the government departments still have no response.
On 2011July 15, the reporter contacted a technical employee who participated in the construction of the Third Bridge that year. He told reporters that due to insufficient funds, Henderson Development in Hong Kong was introduced for investment. Due to problems such as system reform, there was no preparation office, which was handed over to Henderson Third Bridge Co., Ltd. for maintenance. It turns out that each car has to pay a toll of 10 yuan to cross the third Qianjiang Bridge. On June 65, 438+1October 65, 438+0, 2004, Qianjiang Third Bridge Toll Station stopped charging according to the collection regulations of Hangzhou.
He also said that at present, the asphalt on the deck of the Third Bridge is very thin. "It is estimated that it is only about 5 cm, and now it is generally about 9 to 10 cm. Of course, according to the standards of more than ten years ago, it is also up to standard. "
In addition, he also revealed that the construction of the main bridge and the approach bridge is still somewhat different. "I remember that the main bridge at that time laid the foundation. After the beam is erected, it is poured and then paved with asphalt. The part of the approach bridge seems to be a deck made of prefabricated panels. "
After verification, the accident section of the south approach bridge of Qianjiang Third Bridge was built by Zhejiang Hydropower Building.
Question 2: Has the third Qianjiang Bridge passed the acceptance test? According to informed sources, after the completion of the third Qianjiang Bridge, there were quality problems, and several groups of experts came, but they were unwilling to sign when accepting, and they are still in an unaccepted state.
Yesterday, the reporter asked Hangzhou Communications Investment Group whether the acceptance was passed, and the other party said that it would not respond to the question of Qianjiang Third Bridge, subject to the release of the press conference. After the press conference, the Hangzhou Municipal Transportation Bureau did not explain this issue.
Behind the silence of the relevant departments, people can imagine. The congenital deficiency of Qianjiang Third Bridge is obvious (the following italics are publicly reported by the media or Hangzhou trading company official website):
Less than 10 years after it was opened to traffic, in June 2005, Hangzhou invested 68 million yuan to carry out a one-year semi-closed overhaul and landscape transformation of the third Qianjiang Bridge, mainly the main bridge (excluding the approach bridges on both sides).
From 0: 00 on May 16, 2006, the third Qianjiang Bridge was closed again, focusing on bridge reinforcement and landscape lighting maintenance and improvement. Two-way traffic resumed in June 2006.
On September 13, 2006, Zhu Yulong, the chief engineer of Hangzhou Municipal Transportation Bureau, as the leader of the expert group on the overhaul project of Hangzhou Qianjiang Third Bridge, presided over the expert meeting on the technical problems of the overhaul project of Hangzhou Qianjiang Third Bridge. The minutes of the meeting show that there are serious engineering quality problems in the third Qianjiang Bridge.
In June 2009, the third Qianjiang Bridge was completely closed for the first time, which was the first time since 2006.
Just on May 2 1 this year, the south approach bridge of the collapsed Third Bridge was still undergoing joint hinge repair project and weighing system calibration test.
At present, there is no clear responsible person for the maintenance of Qianjiang Third Bridge, and the Third Bridge Company and other units are involved, but it belongs to the state of "who calls who arrives".
On the afternoon of 2011July 16, Hangzhou Traffic Engineering Quality and Safety Supervision Bureau specially organized technicians to conduct a preliminary inspection on the quality of the north-south approach bridge of the third Qianjiang Bridge. In the afternoon, Hangzhou also held an expert group meeting to find out the cause of the accident and other related issues from the technical level.
After verification, the basic procedures for the construction of the third Qianjiang Bridge were standardized and passed the completion acceptance on June 1998.
Question 3: How serious is the quality problem of the third bridge?
Chief Engineer of Communications Department: The main bridge does have quality problems.
The third Qianjiang Bridge was opened to traffic on June 1997, but it has been overhauled many times. At present, the south approach bridge has collapsed. How serious is the disease of the third Qianjiang Bridge?
Hunan Road and Bridge Group issued a statement yesterday, eager to get rid of the relationship with the collapse of the approach bridge of the Third Bridge, but said nothing about the quality of the main bridge it built.
Yesterday afternoon, Bian Junkai, chief engineer of Zhejiang Provincial Department of Transportation, said in an interview with the media that the main bridge of Qianjiang Third Bridge did have quality problems, otherwise it would not have experienced the previous overhaul.
However, regarding the statement that the Third Bridge is listed as a "dangerous bridge", he thinks that the Third Bridge should not be considered as a dangerous bridge. "From the perspective of highway bridges, it is considered to be a dangerous bridge with a grade of five. The Third Bridge needs special institutions to evaluate which types of bridges it belongs to."
It is understood that on September 13, 2006, Hangzhou Municipal Transportation Bureau held an expert meeting on the technical problems of the overhaul project of Hangzhou Qianjiang Third Bridge. The minutes of the meeting show that there are serious engineering quality problems in the third Qianjiang Bridge.
However, Bian Junkai also stressed that the morbidity of the bridge body is caused by the comprehensive reasons such as the design, construction and management of the bridge. "We are already studying the plan for emergency repair and reinforcement, and we will invite experts from outside the province to come and study together."
After the accident, the reporter called the office of Hangzhou Henderson Qianjiang Third Bridge Co., Ltd., and the other party said that the third bridge was equipped with an expensive "bridge health detection system", which can grasp the safety status of the bridge and systematically monitor the bridge.
Why did the bridge deck crack this time and the system didn't sense it? The other party said that it is not clear about the details and needs to ask the relevant departments.
Question 4: Eight hours after the incident, the bridge resumed operation unilaterally. Is it safe?
Construction expert: In order to be prudent, necessary inspections should be carried out.
It took less than 8 hours to resume one-way traffic from 2 am to 9: 45 am.
Have the relevant departments considered that the bridge structure may change due to the accident of the approach bridge, and the main bridge may have hidden dangers? Has the bridge been evaluated for safety within 8 hours? Our reporter asked the traffic police department, but the other party did not respond.
We consulted a graduate tutor from the School of Civil Engineering, Zhejiang University of Technology. He believes that as far as bridge injuries are concerned, it is not a big problem to restore traffic in a short time. In addition, only cars pass, and the speed limit should not have much impact on the bridge structure. But for the sake of caution, the necessary inspection is still necessary. "As an ordinary citizen, worry is very understandable. I think the relevant departments should also consider it, and it may not be announced yet. "
Perhaps our worries are unnecessary, but if there are no problems in other parts, why can't we announce them to the media in time and inform the public in time to reassure everyone? As of press time, the relevant departments did not respond positively.
Question 5: Why are thousands of trucks exceeding 100 tons illegally on the bridge unsupervised this year?
Owner: It's really overloaded. It is a "rule" not to take the Third Ring Bridge.
At the scene, the reporter met Master Xu, the owner of the semi-trailer truck that fell off the bridge. He is 49 years old, from Xiaoshan, and has been operating large trucks for more than 20 years.
He admitted to the reporter that the car was indeed overloaded. "The nuclear load of my car is 34 tons, and the cargo loaded this time is about 100 tons."
Why overload? Don't you know that the Third Bridge prohibits the passage of large trucks? Master Xu said he would settle an account for us:
At present, in the transportation market, the freight of similar bills is calculated by tons, and each ton is 25 yuan. If the steel plate is not overloaded and transported back and forth strictly according to the nuclear load of 34 tons, 34×25=850 yuan can be obtained.
From Gongkang Road to Xiaoshan, if you don't take the third bridge, you have to go around the city and get out of the fourth bridge. The mileage is about 40 kilometers, excluding tolls and bridge tolls. According to the current diesel price in 7 yuan, the fuel consumption for a round trip of 80km is 80×7.2=576 yuan.
"I can earn more than 300 yuan by following the rules. This is not a bridge toll, not a driver's salary, not a vehicle loss. Do you think I can make money? "
Master Xu said it happened to him. In fact, overloading, avoiding going around the city and taking the third bridge have long been common phenomena in the industry. Moreover, vicious competition in the transportation industry is fierce. Even if you are overloaded and avoid taking three bridges around the city, you can only earn more than 1 1,000 yuan.
Rome was not built in a day. Yesterday's press conference revealed that there were many illegal vehicles on the bridge on the surveillance video. Take the day before the accident as an example. From 0: 3 a.m./kloc-0 a.m. to 6: 00 a.m., 50 trucks crossed the third bridge. From June 65438+1 October1July this year15,7330 trucks with over 30 tons passed through the Third Bridge, 1 188 trucks with over 88 tons.
There is a sign at the bridge head of the Third Bridge that prohibits large trucks from going on the Third Bridge. Why are overloaded vehicles still banned repeatedly? Is it because of insufficient management or other reasons?
At present, Hangzhou is carrying out special rectification activities for illegal construction vehicles. Why are these overloaded vehicles still able to cross the urban area unimpeded and drive on the Third Bridge?
Our reporter asked the Hangzhou traffic police department with these questions, but unfortunately the other party refused to respond.
In an interview with the media, the bridge management department said that there are traffic police on duty at the scene during the day, and trucks generally dare not get on the bridge. At night, the van is unscrupulous.
Question 6: Are other bridges in Hangzhou safe?
Hangzhou Road and Bridge Co., Ltd.: At present, it is running normally, safe and reliable.
When the accident happened on the third Qianjiang Bridge, people in Hangzhou couldn't help worrying about the safety of other bridges in downtown Hangzhou.
Hangzhou Luqiao Co., Ltd. is responsible for the maintenance of 72 bridges, viaducts and interchanges in various urban areas of Hangzhou, including 2 Qiantang River Bridges (Fuxing Bridge and Qianjiang No.1 Bridge), Canal Bridge, Shangtang-Zhonghe Elevated Bridge, Desheng Elevated Bridge, Qiu Shi Elevated Bridge and Liushi Elevated Bridge.
Yesterday, the company clearly stated: "According to the continuous maintenance data accumulation and the current situation, at present, the bridges and viaducts maintained by our company are running normally, safe and reliable."
The person in charge of Hangzhou Luqiao Co., Ltd. told the reporter, "The maintenance process of the bridge is inspection-maintenance-re-inspection. Simply put, it is to find the' disease' of the bridge and carry out maintenance and re-inspection in time to make it work normally. "
Take Fuxing Bridge as an example. Every day, the staff will carry out daily inspection to see if there are any defects in the bridge, register it and carry out minor repairs and maintenance in time. For structural problems such as crack observation, settlement measurement of abutment backfill, bearing detection, beam-slab displacement, etc. , regular inspection, such as bearing monthly inspection 1 time, observe the bearing displacement changes; Check the beam-slab displacement once a month, and observe and record the change of beam-slab displacement stroke; There will be a comprehensive inspection every year. In addition to using the existing technicians to check the maintenance work, the company also uses remote control means to install as many as 40 groups of monitoring probes on the bridge, which can monitor and protect the operation of the bridge at any time for 24 hours.
"From the perspective of safe operation, the most critical thing is the structure of the bridge." The person in charge said that in recent years, a typical example of maintenance is the replacement of the bracket of Zhonghe elevated bridge.
Question 7: Why are bridge collapses frequent in China?
Domestic bridge experts: the old and new standards are different, and there is a "dual track system" for domestic bridges.
In fact, the collapsed third Qianjiang Bridge is not "lonely":
14 At about 9: 00 am on July 9, the cable-stayed bridge of Wuyishan Mansion in Nanping City, Fujian Province suddenly broke and collapsed. Up to now, 1 person has been killed and 22 people have been injured. This bridge is the main road leading to Wuyishan Scenic Area. 19991/kloc-0 opened in June, and it has been less than 12 years.
At about 2 a.m. on July 1 1, Tongyuhe Bridge on No.328 Provincial Road in Yancheng, Jiangsu Province collapsed. The bridge was opened to traffic in March 1997, and it has been less than 15 years.
The collapse of the south approach bridge of Qianjiang Third Bridge has once again attracted the attention of the whole country to a question: Why have domestic bridges collapsed frequently in recent years?
In this regard, our reporter asked Xiao Rucheng, who was the design director of large domestic bridges such as Shanghai Lupu Bridge and a professor of bridge engineering at Tongji University. Xiao Rucheng said that he thinks there are many reasons. On the one hand, the domestic transportation industry has developed very fast in recent years, and at the same time, it is inevitable to produce projects with too fast construction speed. In addition, bridge accidents caused by overweight vehicles are also a big problem.