What is the reason for the frequent accidents of ship collisions with bridges?

What is the reason for the frequent accidents of ship collisions with bridges?

Author: Q Ship Shipping Application Platform

Date: 2017-08-08

There are many bridges in navigable waters, low construction standards of old bridges, and driver safety awareness Factors such as thin water, large-scale inland river ships, ocean ships entering the river, and complex and changeable navigation environment are the main reasons for the current frequent occurrence of ship collision bridge accidents in Guangdong jurisdiction. To this end, the Guangdong Maritime Safety Administration actively summarizes experience, clarifies ideas, and finds solutions. Beginning on June 1 this year, the Guangdong Maritime Safety Administration and the Guangdong Provincial Department of Transportation will jointly carry out a one-year special rectification operation to prevent ship collisions with bridges and seek ways to safely supervise navigation bridges in key waters under their jurisdiction.

Currently, accidents involving ship collisions with bridges occur frequently in Guangdong, especially during the flood season and typhoon season, which poses problems for bridge area supervision. Since 2015, there have been many accidents involving ships hitting bridges in the jurisdiction of the Guangdong Maritime Safety Administration. Especially since this year, small accidents involving ships hitting bridges have occurred frequently, and some of them have serious consequences. In order to effectively curb the occurrence of accidents involving ships touching bridges and improve the level of water traffic safety supervision, the Guangdong Maritime Safety Administration has actively strengthened water traffic safety supervision on the one hand, and actively sought countermeasures on the other. On April 14, the Guangdong Maritime Safety Administration organized a special seminar on the prevention of ship collisions in the area under its jurisdiction, analyzing the causes and characteristics of ship collision accidents in the past three years, summarizing the existing problems in preventing ship collision accidents, and putting forward targeted measures. sexual regulatory measures. Beginning on June 1 this year, the Guangdong Maritime Safety Administration teamed up with the Guangdong Provincial Department of Transportation to launch a one-year special rectification operation to prevent ships from colliding with bridges. The operation is currently in the warning education and hidden danger investigation stages.

In recent years, ship collision accidents have occurred frequently. At 5:00 on June 15, 2007, the "Nanguiji 035" loaded with river sand deviated from the channel and collided with the Jiujiang Bridge in Guangdong Province, killing 8 people and the bridge. The collapse of 200 meters attracted nationwide attention. Ship collisions with bridges cause serious economic losses, endanger people's lives, and have huge negative social impacts. Especially this year, the Guangdong jurisdiction is facing a serious situation of ship collision accidents. At 19:00 on January 8 this year, the "Huifengnian 298" wheel loaded with sand and gravel collided with the Hongqili Bridge in Zhongshan City, Guangdong Province, causing the piers to break and the bridge deck to sink 80cm. At 9:55 on April 1 this year, the Wuhu-registered bulk carrier "New Chenguang 20" bound for Hainan from Foshan stumbled from the first-class channel into the fourth-class channel at the bend. No bridge navigation clearance restrictions were found, and no bridge navigation clearance restrictions were found. Effective measures were taken, and the top of the wheel collided with the mid-span of the Lianxi Bridge. The end of the hit beam was offset by about 1.6 meters, and the lower No. 11 pier was slightly tilted. Circumferential cracks were found on the top of the pier, and the bridge deck on the top of the pier was damaged. There are many risks and hidden dangers in the bridges in the Pearl River Delta. "When we find problems, we must actively find the causes so as to prescribe the right medicine. The Guangdong Maritime Safety Administration has summarized the experience and lessons of ship collision accidents in recent years and also discovered some problems and patterns." Guangdong Maritime Safety Administration Navigation Management Office Director Wu Jiansheng told reporters that currently, there are many bridges in the navigable waters under the jurisdiction of the Guangdong Maritime Safety Administration, and the low construction standards of old bridges are one of the most critical reasons for ship collisions with bridges. At present, most of the bridges in Guangdong's jurisdiction are concentrated in the Pearl River Delta water network area. Among them, there are 152 bridges in waterways above grade in Guangzhou's jurisdiction, 148 in Foshan, 126 in Dongguan, and 98 in Zhongshan. Quite a few bridges have been built for a long time, have low navigation levels, and lack anti-collision facilities. While some waterways have been upgraded, the navigation level of the old bridges has not been improved accordingly. As an example, he gave the Guangzhou-Shenzhen Expressway Sichuan-Cha Bridge, which was completed and put into operation in 1997. It is located in the middle section of the Badunhai Channel, with an average daily cross-section traffic volume of more than 100,000 vehicles. It is the economic artery of the Pearl River Delta. However, due to the navigation clearance height of the bridge being 6.49m, it is the shortest bridge in the waterway. In addition, the waterway is frequented by ships, with an average daily ship flow of more than 600 ships. Under special hydrological and meteorological conditions, ship contact is extremely easy to occur. Bridge accident. At around 11:25 on April 24, 2013, when "Shunyu 7" was passing the Sichuan-Cha Bridge, its bow mast and the top of the bridge came into contact with the navigation holes (upstream) between the F3-F4 piers of the Sichuan Bridge. The beam collided. At around 9:30 on April 16, 2016, "Sui Dongfang 326" sailed from Dongguan Zhongtang to Guangzhou Lianhuashan. When passing the Sichuan-Cha Bridge, the bow conveyor gantry and F3-F4# upstream of the Sichuan-Cha Bridge were open to navigation. The junction of the horseshoe of the side beam (5#) outside the hole and the cross beam at the end of the T-structure are in contact. A series of accidents also made the local maritime management department Dongguan Maritime Bureau Mayong Maritime Department very troublesome. For this reason, they visited Guangshen-Zhuhai Expressway Co., Ltd., the owner of the bridge, many times to focus on publicizing relevant regulations and industry standards, Based on the case analysis, it was proposed to increase safety investment and accelerate the construction of the "three lines of defense" such as the Sichuan-Chacha Bridge elevated viaduct, and ultimately successfully promoted the Guangzhou-Shenzhen-Zhuhai Expressway Co., Ltd. from passive "asking me to build" to proactive "I The concept of "building" has changed. In September 2016, the owner of the Sichuan-Chacha Bridge was successfully promoted to build the "three lines of defense" of electronic detection lines (laser anti-collision warning system), electronic alarm lines (electronic monitoring and warning systems) and anti-collision physical lines (water ceiling elevated viaducts). Among them, Sichuan-Cha Bridge Construction of the Sichuan-Cha Bridge Elevated Restricted Viaduct started in November of the same year, with a total cost of more than 30 million. It is expected that the "three lines of defense" construction of the Sichuan-Cha Bridge will be put into use in July 2017.

Similar to the reverse sea channel, some bridges in Foshan Shunde Water Channel are taller and shorter due to different construction years and specifications. The most special thing is that the bridges at the front and rear entrances of the waterway are shorter, while other bridges in the middle of the waterway are very high. The short bridge stuck the ship outside and created a bottleneck, so no matter how high the bridge inside was built, it would be useless. The driver's weak safety awareness is the reason why ship drivers have insufficient awareness of precautions and often only rely on experience to drive. It is also one of the key reasons for the occurrence of high-risk situations in bridge waters. It is understood that the 2007 accident involving a ship colliding with the Jiujiang Bridge in Foshan, Guangdong greatly affected shipping companies in Guangdong, and the industry's awareness of prevention has increased. However, as time goes by, the industry's awareness of prevention has gradually weakened. A considerable number of shipping companies do not pay attention to the risk of a ship hitting a bridge, and there is no corresponding management link. The crew members have weak prevention awareness and lack of control skills. This is particularly reflected in the fact that when the ship sails, the driver The crew did not understand the dimensions of the bridge to be passed and the dimensions of the ship. They drove the ship through the bridge waters based on experience and even with a try mentality. They also failed to strengthen the lookout, drive carefully and use a safe speed before passing the bridge waters. Wu Jiansheng introduced that in recent times, the Guangdong Maritime Safety Administration has been strengthening the ship reporting system. Ships of more than 1,000 tons and foreign-provincial ships visiting the Pearl River Delta for the first time must submit voyage plans to the Guangdong Maritime Safety Department every time. , the voyage plan must include the specific locations of the departure port and the arrival port, what bridges, waterways, and how the waterway is passed along the way. "The route plan is formulated through nautical charts. On the one hand, the ship must prepare the ship before it crosses the bridge. You can evaluate in advance whether it can pass, so as to prevent ships from colliding with the bridge in advance; on the other hand, the maritime department can also grasp the relevant information of ships crossing the bridge to facilitate supervision and services. "In recent years, the risk of sea vessels colliding with bridges has increased when entering the river. With economic development, new situations such as the enlargement of inland river ships and the entry of ocean ships into the river have also increased the risk of ships hitting bridges. "Since seagoing ship crews are not familiar with the inland navigation environment, the probability of foreign seagoing ships entering the river (inland river) is greater than that of inland river ships colliding with the bridge." Wu Jiansheng said that the tonnage of ships entering the rivers and seagoing ships is generally larger now, and those entering the rivers and seas entering the Foshan area The largest ship tonnage is more than 8,000 tons. Due to the increase in ship tonnage, the size and clearance height of the ship exceed the navigation capacity of the existing waterways and bridges, and the ship's maneuverability is also limited. This increases the probability of the ship colliding with the bridge and aggravates the risk of ship collision. Bridge consequences.

The complex navigation environment has an impact