道路桥梁路基路面论文.docx
《道路桥梁路基路面论文.docx》由会员分享,可在线阅读,更多相关《道路桥梁路基路面论文.docx(9页珍藏版)》请在咨信网上搜索。
1、Road drainage design features Abstract: With Chinas rapid economic and social development, road construction has entered a rapid development period. However, increasing traffic and load cases, the use of traditional materials and construction techniques into the road pavement in use revealed many pr
2、oblems, especially in the southern rain-fed areas, roads, water and surface water damage to the phenomenon of performance was very prominent. This has become so foreign road construction of a major difficulty. Therefore, the conventional asphalt concrete pavement in both the design and construction
3、process needs to be improved on. The porous asphalt concrete pavement is adapted to the needs and developed a new type of pavement structure, is particularly suitable for wet areas. This paper briefly studied.Keywords: porous asphalt concrete, pavement, mix design, construction techniques, quality c
4、ontrol1 Background With Chinas rapid economic and social progress, and infrastructure are also at an unprecedented pace, highway construction is the construction of infrastructure facilities one of the key. As of the end of 2005, highway mileage has more than 41,000 km. Although with the new materia
5、ls and construction process optimization, continuous improvement of the quality of asphalt pavement, but there is still a considerable part of the asphalt concrete pavement in the process of using a certain degree of damage occurring phenomenon, especially because of a combination of factors caused
6、the early ( with 3 years or so) damage, resulting in the use of asphalt pavement performance and life often achieve their design level, has a serious impact on road transport normal functioning, causing huge economic losses, but also to some extent hampered the development of highway. Past road dama
7、ge in the form mainly as rutting, low temperature cracking and fatigue cracking, while the use of a semi-rigid pavement structure and the quality of the asphalt mixture has been effectively mitigated. But the damage in the form of water damage is replaced, a troubled company developed a new issue of
8、 highway. Especially in the rainy areas in southern China, the highway in the spring melt season, the rainy season and the rainy season, the road will appear Ma surface, loose, and even out the grain pits, this dramatic early destruction, is that people anticipated.2 of water damage Water damage to
9、asphalt pavement problems, the first thing comes to highway drainage system. In order to ensure the stability of roadbed, good road safety performance and driving, highway drainage facilities are set up well to rule out road sector within the scope of surface water and groundwater. Highway drainage
10、from the road sector, the general surface drainage, surface drainage and underground drainage within three parts. Road surface drainage sector, including road surface drainage, drainage and slope the median drainage. Within the porous pavement surface drainage, including drainage, road drainage and
11、permeable edge primary drainage. Underground drainage including sewer, ditches, underground drain or underground pipe. Research shows that setting a good drainage system, can improve the life of asphalt up to 30% or more. In contrast, poor drainage asphalt pavement, which is usually caused by premat
12、ure destruction of the surface layer of pavement structure in water-saturated state, and traffic caused by heavy vehicles. Any layer of pavement layer, or soaked in a saturated state, will lead to lower structural layer strength, speed up the road the emergence and development of various diseases. W
13、ater damage to asphalt pavement from water, surface water infiltration is possible only lead to stripping of asphalt film and aggregate, resulting in road damage. Therefore, the seepage of asphalt pavement will produce key indicators of water damage. It should be said to increase the seepage coeffic
14、ient index for improving the quality of construction of asphalt pavement, preventing water damage is important. The porous asphalt road surface drainage system is based on the above characteristics and developed a new type of road pavement structure. Drainage asphalt pavement, also known as permeabl
15、e asphalt pavement, the surface layer is also known for porous asphalt wearing course; refers to the compacted porosity of 20%, the mixture can form a drainage channel within the new asphalt concrete surface layer, its real mechanism for the formation of the skeleton in accordance with embedded crow
16、ded - gap structure of open-graded asphalt mixture. Its characteristics are: first, the rain can prevent the formation of road surface water film, sliding performance, improve road roughness, vehicle slip resistance; to eliminate or reduce the rear water flowers, and raise the drivers line of sight
17、of the definition to improve traffic safety; second, high temperature stability, resistance to rutting ability; third, with light and glare to reduce traffic noise and other functions. Seen with both environmentally friendly road drainage, and many characteristics conducive to traffic safety, in lin
18、e with current technological developments and social trends.3 research statusSince the 1960s, some European countries such as Germany, France, Britain and Italy have proposed a porous asphalt pavement concept, and started research on the asphalt material, made a lot of useful results, thus contribut
19、ing to the technology the application. European research and development is a first porosity as high as 20% to 25%, a thickness of 4 5cm of the wear layer. As porosity, water can penetrate into the road, connected by a road in the discharge gap to the edge of the road. There is no rain so thick wate
20、r film, to avoid the hydroplaning generation, but also no longer appears splashing, and effectively to ensure traffic safety. Because of this multi-gap can quickly drain the road, so called porous asphalt pavement. So far European countries porous asphalt pavement research and the use of more than 3
21、0 years, part of the state asphalt pavement drainage area of about road accounted for 10% or more. European countries the choice of the asphalt material to reach a basic consensus is to use the modified asphalt, and mainly consider the following requirements: have a good high temperature stability,
22、low temperature cracking resistance and oxidation resistance. Notify the United States in 1973 recommend the use of open-graded the country sliding wear layer surface, significantly reduce the rainy day hydroplaning phenomenon, have achieved good results. Into the late twentieth century, countries o
23、n the application of porous asphalt pavement technology research entered a new phase of highway projects in the U.S. long-term performance of road projects there is a special porous asphalt material for the large experimental study of sub-surface ; in the United States in 1990 TRB Annual Meeting hel
24、d in Washington, the main issue is the drainage of the asphalt material in road engineering experience. In the same year, the U.S. Federal Highway Administration has developed. Sliding surface of open-graded asphalt mixture design method was surface porosity, thickness and major functions are descri
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 道路 桥梁 路基 路面 论文
1、咨信平台为文档C2C交易模式,即用户上传的文档直接被用户下载,收益归上传人(含作者)所有;本站仅是提供信息存储空间和展示预览,仅对用户上传内容的表现方式做保护处理,对上载内容不做任何修改或编辑。所展示的作品文档包括内容和图片全部来源于网络用户和作者上传投稿,我们不确定上传用户享有完全著作权,根据《信息网络传播权保护条例》,如果侵犯了您的版权、权益或隐私,请联系我们,核实后会尽快下架及时删除,并可随时和客服了解处理情况,尊重保护知识产权我们共同努力。
2、文档的总页数、文档格式和文档大小以系统显示为准(内容中显示的页数不一定正确),网站客服只以系统显示的页数、文件格式、文档大小作为仲裁依据,平台无法对文档的真实性、完整性、权威性、准确性、专业性及其观点立场做任何保证或承诺,下载前须认真查看,确认无误后再购买,务必慎重购买;若有违法违纪将进行移交司法处理,若涉侵权平台将进行基本处罚并下架。
3、本站所有内容均由用户上传,付费前请自行鉴别,如您付费,意味着您已接受本站规则且自行承担风险,本站不进行额外附加服务,虚拟产品一经售出概不退款(未进行购买下载可退充值款),文档一经付费(服务费)、不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
4、如你看到网页展示的文档有www.zixin.com.cn水印,是因预览和防盗链等技术需要对页面进行转换压缩成图而已,我们并不对上传的文档进行任何编辑或修改,文档下载后都不会有水印标识(原文档上传前个别存留的除外),下载后原文更清晰;试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓;PPT和DOC文档可被视为“模板”,允许上传人保留章节、目录结构的情况下删减部份的内容;PDF文档不管是原文档转换或图片扫描而得,本站不作要求视为允许,下载前自行私信或留言给上传者【胜****】。
5、本文档所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用;网站提供的党政主题相关内容(国旗、国徽、党徽--等)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。
6、文档遇到问题,请及时私信或留言给本站上传会员【胜****】,需本站解决可联系【 微信客服】、【 QQ客服】,若有其他问题请点击或扫码反馈【 服务填表】;文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“【 版权申诉】”(推荐),意见反馈和侵权处理邮箱:1219186828@qq.com;也可以拔打客服电话:4008-655-100;投诉/维权电话:4009-655-100。