An arched steel structure is built on the Shenzhen-Maoming Railway to reduce noise. [Southcn.com] Sound level reduced to 50 decibels, similar to that of normal conversation Engineers and technicians working on the Shenzhen-Maoming Railway, an important transport link between the two coastal cities in Guangdong province, have finished construction of a fully enclosed noise barrier on a section running through an ecological scenic site. The 2,036-meter arched steel structure, with sound insulation and concrete acoustic boards, is just 800 meters from Birds' Paradise, a scenic and ecological attraction in Jiangmen, Guangdong. The attraction, which is covered by 400-year-old banyan trees, is home to more than 30,000 birds of over 40 varieties. The paradise became a popular site after celebrated Chinese writer Ba Jin penned The Birds' Paradise after he took in the lush scenery of the tree-covered island in the early 1930s. The noise barrier cost 180 million yuan ($27.5 million), according to Fifth Construction Ltd of China Tiesiju Civil Engineering Group. It was the first of its kind in high-speed railway construction using technology for a fully enclosed sound barrier, it said. Construction was not allowed between March and July, which is often a breeding period for birds on the island, the builder said. The fully enclosed sound barrier will help reduce about 30 percent of traffic noise, a safe standard for the living and breeding environment of the birds, said Mo Yongchun, a manager with China Tiesiju Civil Engineering Group. The 390-kilometer Shenzhen-Maoming Railway, which is designed for train speeds up to 200 kilometers per hour, is scheduled to open in mid-2018. According to Mo, the noise will be 76.5 decibels at a distance of 3.5 meters from the railway when a train passes - about the same as a car. It will be below 50 decibels at the Birds' Paradise, said Liu Zhenbiao, assistant chief engineer of the Bridge Design and Research Department of the China Railway Siyuan Survey and Design Group. That is about as loud as a normal conversation. The noise will pose no threat to the living conditions of birds, he said. According to Liu, the barrier is designed to stand up to the high winds of a typhoon. [email protected]rubber wristbands in bulkmake your own wristbandcustom fidget24hourwristbandsthe wristband factory
DHAKA - Millions of people living in central Bangladesh used to refer to the Dhaleshwari River as the "River of Sorrows" as the waterway made it extremely difficult for people to get to the capital city Dhaka. In the absence of a bridge spanning the river, people were cut off from the capital for centuries, which impacted businesses as well as communities. But the peoples' collective headache was finally remedied by China constructing a bridge and linking both banks and, in doing so, making life easier for all concerned. The 6th China-Bangladesh Friendship Bridge, as it is known, is situated in the Munshiganj district, about 30 kilometers away from Dhaka and the bridge's construction was finished eight years ago. The bridge has meant that there is now a fixed transportation route between Dhaka city and Munshiganj, one of the major areas supplying agricultural products to the capital city. Local businesses said the vast changes brought on by the bridge have been revolutionary, in terms of both the economic development of the area itself and also the convenience and ease it offers locals both professionally and personally. Such is the popularity of the bridge, that it has been labeled as one of Bangladesh's "lifeline structures." Construction of the sixth China-Bangladesh Friendship Bridge began in July 2005 and was completed in January 2008, six months ahead of schedule, much to the delight of all involved and all whose lives would be improved by the bridge.
