共查询到16条相似文献,搜索用时 15 毫秒
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分析了探地雷达在道路无损检测中的原理,对探地雷达在路面厚度检测、路面板底脱空检测、路面密度检测、路面材料弹性模量测定及新建沥青路面的质量控制等方法的应用进行了研究,为探地雷达在道路无损检测中更好的应用和推广提供了理论与实践意义。 相似文献
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路面结构层厚度检测是道路质量控制的重要工作,采用具有快速、无损、可连续测试的探地雷达技术对其进行检测,更能为竣工验收提供科学依据。文中介绍了探地雷达技术在公路路面工程厚度检测中的实际应用,说明探地雷达检测公路路面厚度在实际应用中是切实可行的,在公路工程质量检测中具有独特的优势,为公路路面厚度检测增添了一种新的技术方法。 相似文献
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利用探地雷达技术对公路隧道质量进行检测,提出了探地雷达技术在公路隧道质量检测应用中的工作方法,通过对多条高速公路隧道质量检测的分析与总结,得出了高速公路隧道渗水、脱空、回填不密实的典型图像。 相似文献
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Hideaki Miyamoto Jun'ichi Haruyama Shuichi Rokugawa Kyosuke Onishi Tetsuma Toshioka Jyun-ichi Koshinuma 《Bulletin of Engineering Geology and the Environment》2003,62(4):281-288
Ground penetrating radar (GPR) has been successfully used to detect a lava tube in a basaltic lava flow from the Fuji volcano, Japan. The target lava tube, Komoriana cave, is in the northern part of the Aokigahara lava flow which was emplaced over 1,000 years ago. The lava tube was detected by simply dragging the GPR antenna along a prefecture road, demonstrating the advantages of this method compared with detailed mapping and geological investigations. As a massive basaltic lava flow allows deep penetration of the radar pulse, the reflection radar profile obtained showed two very clear structures which were interpreted from the waveforms to be the roof and the bottom of the lava tube from the waveforms alone. This was subsequently confirmed by careful survey measurements of the Komoriana cave lava tube. The feasibility study clearly demonstrated that GPR is a very effective and convenient tool for discovering unknown lava tubes hidden deeply inside lava flows. 相似文献
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指出探地雷达作为一种先进的无损检测技术,其优越性很好地解决了以钻芯取样为主的传统路面厚度检测效率低、代表性差、偶然性大的缺点,对这种新型的路面厚度检测技术和传统钻芯取样法进行对比,证明了应用探地雷达对路面厚度进行检测是可行的。 相似文献
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简要介绍了地质雷达在路面厚度检测中的基本原理,对其产生误差的原因进行了简要的分析,并且结合工程实例,验证了地质雷达在检测道路厚度方面的应用是可行的、可靠的。 相似文献
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就探地雷达在隧道衬砌质量检测中的测线布设、参数设置、安全性等问题进行了探讨和阐述,并以实际工程案例说明,雷达检查宜以施工过程质量检查为主,测线布设要有针对性,参数的设置要保证检测效果,要保证检测人员和设备的安全。 相似文献
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泥石流是北京地区最严重、最具破坏性的地质灾害类型,为了科学防治泥石流,本次采用高密度电阻率法和地质雷达相结合的方法,通过正反演计算和实测剖面的综合解释,基本查明了北京延庆区松散堆积物的厚度,其中井庄乡果树园村泥石流沟域范围内松散堆积物厚度较大,一般40~60 m,自下游向上逐渐变薄,并且浅部存在一层厚度为10~15 m的块石土堆积层;其余地段松散堆积物厚度一般8~10 m,并估算了研究区松散堆积物的方量。这两种方法的综合应用对松散堆积物的划分具有较好的效果,为科学防治泥石流提供了依据。 相似文献
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沥青厚度是道路质量验收的重要数据。传统的取芯检测不能全面代表整个工程的沥青厚度。介绍了地质雷达(GPR)探测原理。通过城市道路实例,表明采用地质雷达检测技术能够密集采样、无损检测,且探测成果较可靠,能满足道路验收要求。因此,该技术应在道路质量验收检测中大力推广。 相似文献
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Failure of cast iron water mains in Australia is a common occurrence. Water utilities are seeking solutions to optimise the renewal and rehabilitation of ageing cast iron critical water mains (diameter ≥ 300 mm). Failure pressures of three large-diameter cast iron pipe specimens (600 mm in diameter) were tested. A large corrosion patch was machined onto each pipe section to initiate pipe failure. A large corrosion patch and significant reduction (>90%) of pipe wall thickness were needed to fail the tested pipe specimens. All three pipes under test exhibited leaking before bursting, indicating that the concept of leak-before-break (LBB) could be used for pipe failure prevention. In addition, LBB provides valuable information that could be added to the pipe asset database to make better management decisions on repair or replacement along with all other asset information. The study also found that small corrosion patches (<50 mm) with low remaining wall thickness may cause pipe leaks, but are less likely to cause major pipe bursts. 相似文献
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A modeling procedure that predicts trihalomethane (THM) formation from field sampling at the treatment plant and along its distribution system using Tampin district, Negeri Sembilan and Sabak Bernam district, Selangor as sources of data were studied and developed. Using Pearson method of correlation, the organic matter measured as TOC showed a positive correlation with formation of THM (r=0.380,P=0.0001 for Tampin and r=0.478,P=0.0001 for Sabak Bernam). Similar positive correlation was also obtained for pH in both districts with Tampin (r=0.362,P=0.0010) and Sabak Bernam (r=0.215,P=0.0010). Chlorine dosage was also found to have low correlation with formation of THM for the two districts with Tampin (r=0.233,P=0.0230) and Sabak Bernam (r=0.505,P=0.0001). Distance from treatment plant was found to have correlation with formation of THM for Tampin district with r=0.353 and P=0.0010. Other parameters such as turbidity, ammonia, temperature and residue chlorine were found to have no correlation with formation of THM. Linear and non-linear models were developed for these two districts. The results obtained were validated using three different sets of field data obtained from own source and district of Seremban (Pantai and Sg. Terip), Negeri Sembilan. Validation results indicated that there was significant difference in the predictive and determined values of THM when two sets of data from districts of Seremban were used with an exception of field data of Sg. Terip for non-linear model developed for district of Tampin. It was found that a non-linear model is slightly better than linear model in terms of percentage prediction errors. The models developed were site specific and the predictive capabilities in the distribution systems vary with different environmental conditions. 相似文献