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首页> 外文期刊>Tunnelling and underground space technology >The mechanical behaviour of drainage pipeline under traffic load before and after polymer grouting trenchless repairing
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The mechanical behaviour of drainage pipeline under traffic load before and after polymer grouting trenchless repairing

机译：聚合物注浆无沟修复前后交通荷载作用下排水管道的力学行为。

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摘要

Polymer grouting technology is an economical and efficient trenchless way to repair leakage and settlement of drainage pipeline. In this paper, the mechanical behaviours of drainage pipeline under traffic load before and after polymer grouting and cement grouting trenchless repairing are investigated through three-dimensional (3D) finite element method (FEM). Four different working conditions, including normal pipeline, disengaging pipeline, polymer-repaired pipeline, and cement-repaired pipeline are considered. The effects of load type, load location, buried depth on the mechanics of pipe are discussed in detail. The results show that the traffic load has great impact on both sides of the load position within 4 m, and the dangerous points of the pipeline are located at the bell and spigot joints. The most unfavorable condition occurs when the location of the disengaging corresponding to the load position. The greater influence on the disengaging pipeline with deeper buried depth applied. The disengaging pipeline can be repairing effectively and reliably by both the polymer and the cement grouting technology. However, the polymer material is more valuable than the cement material in terms of the Mises stresses after repairing.
机译：聚合物灌浆技术是一种经济有效的无沟渠修复排水管道渗漏和沉降的方法。本文通过三维（3D）有限元方法研究了聚合物灌浆和水泥灌浆无沟修复前后排水管道在交通荷载作用下的力学行为。考虑了四种不同的工作条件，包括普通管道，分离管道，聚合物修复管道和水泥修复管道。详细讨论了载荷类型，载荷位置，埋深对管道力学的影响。结果表明，交通负荷对负荷位置两侧的4m以内影响较大，管道的危险点位于钟形和套管接头处。最不利的条件发生在分离位置对应于负载位置时。埋深越深，对分离管道的影响越大。通过聚合物和水泥灌浆技术，可以有效，可靠地对分离管道进行修复。但是，就修复后的米塞斯应力而言，聚合物材料比水泥材料更有价值。

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