重力式码头水下抛石体加固技术及检测研究
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摘要
介绍了采用水下不分散水泥砂浆对码头水下抛石体进行高压注浆加固的方法。为了检测高压注浆加固效果 ,采用探地雷达、弹性波CT无损检测方法 ,配合所取岩芯的波速测试及点荷载强度试验 ,对码头水下高压注浆效果进行综合检测。研究结果表明 ,采用一定配合比及加有一定量的水下不分散剂的水泥砂浆加固水下抛石体 ,方法可靠、效果良好。弹性波CT、探地雷达用于水下高压注浆加固效果检测 ,检测结果直观、可靠 ,可用于其它用途的高压注浆效果检测。
This article deals with the reinforcement method of pouring high-pressure non-dispersive mortar into the underwater riprap of piers as well as the research on the comprehensive effectiveness detection of the method.Non-destructive examination methods are used such as ground penetrating radar,elastic wave CT,wave velocity and point loading strength of the rock core specimens.It is seen from the research results that it is a reliable and effective method to reinforce underwater riprap by pouring into the underwater riprap a certain quantity of high-pressure grout, which is blended in the proper ratio of sand and cement with a certain quantity of underwater non-disperser,and that elastic wave CT and ground penetrating radar can be employed in the effectiveness detection of the reinforcement by underwater high-pressure grouting.In addition, these detecting methods can also be applied to the effectiveness detection of the high-pressure grouting in other usages.
This article deals with the reinforcement method of pouring high-pressure non-dispersive mortar into the underwater riprap of piers as well as the research on the comprehensive effectiveness detection of the method.Non-destructive examination methods are used such as ground penetrating radar,elastic wave CT,wave velocity and point loading strength of the rock core specimens.It is seen from the research results that it is a reliable and effective method to reinforce underwater riprap by pouring into the underwater riprap a certain quantity of high-pressure grout, which is blended in the proper ratio of sand and cement with a certain quantity of underwater non-disperser,and that elastic wave CT and ground penetrating radar can be employed in the effectiveness detection of the reinforcement by underwater high-pressure grouting.In addition, these detecting methods can also be applied to the effectiveness detection of the high-pressure grouting in other usages.
引文
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[3]李 玮,等.物探新技术在山地采空洞穴探查中的应用[J].勘察科学与技术,1998,(2):59-62.
[4]段世超,等.小浪底大坝混凝土防渗墙质量检查[J].西部探矿工程.2000,(5):36-38.
[5]王文德,等.弹性波CT技术及应用[J].煤田地质与勘探,1996,(5):57-61.
[6]程久龙.岩体破坏弹性波CT动态探测试验研究[J].岩土工程学报,2000,22(5):565-568.
[7]LiuGuanqun,JiaYounggang,LiuHongjun,etal.ACaseStudyToDetecttheLeakageofUndergroundPressurelessCementSewagePipeUsingGPR ,Electrical,andChemicalData[J].EnvironmentScience&Thecnology,2002,36(5):1077-1085.
[8]刘红军,贾永刚.探地雷达在采空区勘察中的应用[J].工程勘察,1999,10(9):73-76.
[9]ZhouHui,Sato.ApplicationofVerticalRadarProfilingTech niquetoSendaiCastle[J].Geophysical,2000,65(2):533-539.
[10]刘传孝,等.探地雷达空洞探测机理及应用事例分析[J].岩石力学与工程学报,2000,19(2):238-241.
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