US EUROPE AFRICA ASIA 中文
    China / Cover Story

    Disposal of construction debris growing problem in urban areas

    By Xu Wei/Zhou Mo/Zhou Wenting (China Daily) Updated: 2015-12-25 07:35

    Disposal of construction debris growing problem in urban areas
    Lack of supervision

    Many experts said the disposal of construction waste nationwide is an even more pressing problem than in Shenzhen, where it has at least received official attention.

    He Gengxin, a researcher at the Chinese Academy of Building Research, who researches disposal methods for construction waste, said the problem is widespread. "The fact is, the dumping sites in many first- and second-tier cities are already functioning beyond their capacities," he said.

    According to Chen, there are very few barriers to the demolition of old residential communities, which means demolition work is carried out randomly: "Many cities are taking on a new look every three to five years as the rate of urbanization quickens."

    In February, Xinhua News Agency reported that Beijing planned to demolish approximately 15 million sq m of illegal buildings this year to improve urban management. According to Chen, that program alone could generate 15 million tons of waste in the capital by the end of the year.

    A property developer surnamed Wu, from Mianyang, Sichuan province, said local construction companies can use an information-sharing platform to post details of the waste they have generated and then sell it to other developers, such as road builders, for use in their own projects. Companies that don't dispose of the waste in this way have to dump it at privately owned sites at a cost of about 5 yuan per cu m.

    The platform operator acts as an intermediary between supply and demand sides. "He pays you for the waste and then sells it other engineering projects. If not, he helps you transfer the waste and earn money from transporting it," Wu said.

    Future concerns

    The Shenzhen landslide has prompted safety checks at dumping sites across the country.

    The Shanghai government has ordered all ongoing construction sites, including those for real estate and subways, to assess and overhaul the ways they dispose of construction trash.

    "By Wednesday, the city and district-level administrations of forestry and landscaping, which oversee the disposal of building waste in their areas of jurisdiction, had checked all 238 construction sites in the municipality. They didn't find any signs that construction waste has been piled too high," said Xu Wei, a spokesman for the Shanghai Municipal People's Government.

    In Shanghai, construction waste is mainly used to backfill low-lying land, rivers and ditches, and to promote recycling and utilization it is also used in local landscape architectural projects.

    According to Shen Sanxin, chief engineer at Shanghai Zhuzong Group Construction Development, the urban management department imposes administrative penalties on designated transporters of building trash who dispose of it in unauthorized ways or who cause pollution by failing to transport the waste in sealed containers.

    "In June, the city authority said it would increase the number of surveillance cameras to build a stronger monitoring network," Shen said.

    However, Chen said the only long-term solution to the problem lies in greater use of recycled waste from construction sites. "First, there should be nationwide legislation on the disposal of construction waste to prevent random dumping and encourage recycling," he said, adding that developers should regard construction waste as a ready-made resource for recycling.

    "Given the volume of waste generated every year, it's impossible to dump all of it," he said.

    Based on the current rate of generation, every urban area in the city would be covered by construction waste within 300 years, but local authorities have little motivation to build dumping and recycling facilities because they generate very little money, according to Chen.

    "Constructing new buildings is like building a kitchen, while building site for dumping and recycling is like building a toilet. At the moment, everybody wants the kitchen, but nobody wants the toilet," he said.

    Highlights
    Hot Topics
    ...
    岛国av无码免费无禁网| 99精品久久久久中文字幕| 人妻AV中文字幕一区二区三区| 亚洲AV无码一区二区三区性色 | 天堂在线资源中文在线8| 亚洲精品无码av人在线观看 | 天堂а√中文在线| 91嫩草国产在线无码观看| 永久免费AV无码网站国产| 中文字幕亚洲第一在线| 无码国内精品久久人妻麻豆按摩 | 亚洲国产无套无码av电影| 久久久久久无码国产精品中文字幕 | 日韩欧美中文在线| 永久无码精品三区在线4| av大片在线无码免费| 无码囯产精品一区二区免费| 自拍偷在线精品自拍偷无码专区| 日本免费中文字幕| 中文字幕丰满伦子无码| 亚洲午夜福利精品无码| 天码av无码一区二区三区四区| 无码av免费一区二区三区试看| 无码137片内射在线影院| 亚洲精品无码不卡在线播放HE| 亚洲中文字幕久久精品无码APP | 十八禁无码免费网站| 亚洲AV永久无码区成人网站| 日本无码小泬粉嫩精品图| 国产成人无码AV麻豆| 在线欧美天码中文字幕| 白嫩少妇激情无码| 无码国产精品一区二区免费| 熟妇人妻中文av无码| 超清无码熟妇人妻AV在线电影| 少妇无码AV无码一区| 中文字幕乱码无码人妻系列蜜桃| 亚洲AV综合色区无码另类小说| 久久精品无码专区免费东京热| 99无码人妻一区二区三区免费| 成在线人AV免费无码高潮喷水|