通过管涌试验校验证实了有关公式的有效性。
The application of the formulae to some examples of piping tests gives reasonable results in comparison with the experimental observations.
本文对管涌地层构造和层状管涌进行了分析。
Analysis was made on piping stratum structure and stratified piping.
堤坝的渗流会导致渗漏、管涌、滑坡甚至危及整个大坝的安全。
Seepage might cause leakage, piping effect, landslide and even endanger the whole dam.
由于大坝出现了严重渗漏和管涌，1999年永记水库被鉴定为病险水库。
Yongji reservoir was appraised as the defective reservoir in 1999 due to the serious leakage and piping.
由于洪水位还有不断上升的发展趋势，防治管涌还应注意控制洪水位上升的问题。
But when flood level is rising gradually, controlling the flood level's rising is also very important to prevent dike piping.
第一个分析的问题是堤坝管涌问题，应用人工智能技术建立了管涌预测与判定的模型。
The first problem analyzed is seepage piping in embankment, the artificial intelligent model of prediction and judgment for piping is proposed.
工程实例的计算表明，利用该模型可以得到管涌通道的渗透流速，评价地层的渗漏特性。
Verified by an example, the model can be used to get the leakage velocity of piping passage and estimate the permeability of strata.
应用453个管涌试验资料，对现有的国内外7种砂砾石渗透定性分析计算方法进行了验证。
By use of 453 groups of piping test data, verification was made to the existing 7 analytic methods for stability of soil stratum permeability at home and abroad.
提出了填充系数理论，制订了土体渗透破坏形式的填充系数判别式和管涌临界破坏坡降计算图。
The filling coefficient theory was put forward, a criterion for the filling coefficient of soil stratum failure and a critical hydraulic gradient chart were formulated.
悬挂式防渗墙能显著提高堤基抵抗管涌破坏的能力，且防渗墙布置在堤防下游侧比上游侧更有效。
Suspended cut-off wall can effectively increase foundation resistance to piping and it is more efficient when it is situated in land side than in river side.
因此研究管涌机理，并在此基础上研究悬挂式防渗墙对双层堤基管涌的控制效果，具有重要的现实意义。
Therefore, it is very necessary and practical to study the mechanism of dike foundation piping and the effect of suspended cut-off wall.
这类管涌，可称为“喷泉管涌”或“喷砂管涌”，如抢救不及时，孔径不断扩大，可能造成严重的灾害。
We call this piping"spouting spring piping"or"sandblasting piping", if rescue not prompt, the aperture continuously expands, possibly creates serious disaster.
结合工程实践分析找出管涌发生原因，提出具体解决方案，为类似工程预防管涌发生提出了很好的建议。
Based on the analysis of engineering practice, this paper probes into the causes of piping and puts forward solutions, providing good Suggestions for piping prevention in similar projects.
同时，在坝基厚度改变情况下，分别探索了渗流量、砂环直径、测压管水头、管涌破坏时间等的变化规律。
Meanwhile, in the case of the change of foundation thickness, the law of seepage amount, sand ring diameter, piezometric head, piping breach time etc were respectively explored.
由于现场钻孔管涌试验所得的坝基岩体试验破坏坡降较大，不足以反映断层破碎带最差部位的岩体破坏坡降。
The hydraulic gradient gained from the permeability testing in the site is higher and can not reflect the real hydraulic gradient of the heavily fractured rock.
根据试验资料确定了悬挂式防渗墙及其前后水平段的渗流临界坡降，给出了管涌险情是否会影响大堤安全的估算公式。
The critical seepage gradients of the cut-off walls are obtained according to the experimental data. The formula for assessing the influence of piping on safety of levee is…
白蚁管涌（漏）与水利管涌是两个完全不同的概念，而水利工程技术人员往往将其混淆起来，统称为水利管涌进行处理。
Piping in dykes can be caused by termite or other physical means, but technical personnel of water conservancy often confused them and called both as water conservancy piping in treatment.
管涌形成主要受控于堤基土体结构、土的物理力学性质和洪水位，经过不断改进的减压井等工程措施对防止管涌是有效的。
The formation of piping is controlled by the structure, physical and mechanical properties of the soil for the base of dike and flood level.
当三层堤基浅砂层较薄时，将发生深层管涌破坏，管涌破坏区涉及浅砂层及下部砂砾石层，其宽度和深度较双层堤基大，出口涌砂量也较多。
But for triple stratum foundation, if the top sand layer is relatively thin, piping is vertical. The damage zones are large in width and depth that expand to the sand layer and gravel layer.
介绍了“同位素示踪”法和“db—3 i型堤防管涌渗漏检测系统”在洪泽湖大堤渗漏检测中的应用情况，并对两种方法的应用进行了对比。
This paper introduces the applications of "isotope tracting method" and "DB-3 I embankment piping and leakage detecting system" to Hongze Lake embankment, and compares the two methods.
堤坝的管涌渗漏通道可看作是一个持续作用的线热源，通过研究管涌渗漏水对地层温度的影响，利用热源法的原理建立了管涌渗漏的持续线热源模型。
Through studying the influence of piping water on strata temperature, a continuous line-heat-resource model is proposed by using the heat resource theory.
堤坝的管涌渗漏通道可看作是一个持续作用的线热源，通过研究管涌渗漏水对地层温度的影响，利用热源法的原理建立了管涌渗漏的持续线热源模型。
Through studying the influence of piping water on strata temperature, a continuous line-heat-resource model is proposed by using the heat resource theory.
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