| 引用本文: | 刘梦梅,韩森,杨赫,吴晓明,牛冬瑜.桥面铺装防水粘层渗水、积水分析与评价方法[J].哈尔滨工业大学学报,2020,52(3):115.DOI:10.11918/201810023 |
| LIU Mengmei,HAN Sen,YANG He,WU Xiaoming,NIU Dongyu.Analysis and evaluation method of water seepage and accumulation of bridge deck pavement waterproof interlayer[J].Journal of Harbin Institute of Technology,2020,52(3):115.DOI:10.11918/201810023 |
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| 摘要: |
| 针对现行桥面铺装防水粘层渗水、积水检测技术不完善的问题,首先通过数字图像处理技术,量化粘层的空隙分布状态,提出基于空隙率、空隙数量、空隙等效直径的粘层渗水、积水评价方法. 然后,建立粘层空隙三维重构模型,直观展现粘层空隙立体形态分布特征. 最后,结合粘层横向渗水试验,测量5种典型桥面防水粘层的渗水量,验证了数字图像分析技术应用于评价粘层渗水、积水的可靠性. 研究结果表明:同步碎石空隙分布丰富,空隙尺寸大,易于渗水,且为层间积水提供了充足的储水空间；AC-5和稀浆封层空隙分布密且尺寸小,防水能力优于同步碎石；SBS改性乳化沥青粘层的空隙率较小,且空隙分布离散,空隙间几乎不连通,抗渗水能力最好. |
| 关键词: 桥面铺装 防水粘结层 数字图像处理 粘层横向渗水 粘层积水 |
| DOI：10.11918/201810023 |
| 分类号:U443.33 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51608045) |
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| Analysis and evaluation method of water seepage and accumulation of bridge deck pavement waterproof interlayer |
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LIU Mengmei,HAN Sen,YANG He,WU Xiaoming,NIU Dongyu
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(Key Laboratoryof Special Area Highway Engineering of Ministry of Education (Chang’an University), Xi’an 710064, China)
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| Abstract: |
| Aiming at the problem that the existing evaluation methods of water seepage and accumulation of bridge deck pavement waterproof interlayer are not perfect, digital image processing technique was used to quantify the pore distribution of interlayer, and the evaluation method of water seepage and accumulation was proposed based on indexes of porosity, pore number, and equivalent pore diameter. Then, a three-dimensional reconstruction model of pores in bridge waterproof interlayers was established and the structure of the pores was visually presented. At last, combining with the transverse permeation tests of 5 typical interlayers, the reliability of the digital image analysis technique in evaluating water seepage and accumulation of interlayers was verified. Test results show that synchronous surface dressing had rich pore distribution and large pore size, which is easy to permeate water and can supply sufficient space for water accumulation. The pores of AC-5 and slurry seals were dense and small, making the seepage resistance of AC-5 better than that of synchronous surface dressing. The porosity of the SBS modified emulsified asphalt as interlayer was small, and there was little connectivity between pores due to the dispersion of pores. Therefore, the waterproof performance of SBS modified emulsified asphalt used as bridge waterproof interlayer was the best. |
| Key words: bridge deck pavement waterproof adhesive interlayer digital image processing lateral seepage of interlayer water accumulation of interlayer |
