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Unified Design Approach for Rock Fissure Grouting - Best Design Practice for Pre-Grouting of Rock Tunnels in Sweden

机译：裂隙灌浆的统一设计方法-瑞典岩石隧道预注浆的最佳设计实践

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摘要

In general, all tunneling contracts in Sweden are based on performance contracts. There has been a large increase in the knowledge and understanding during the last decades in Sweden regarding sealing of rock tunnels using mostly cementitious rock fissure grouting. This increased know-how derives from extensive research and execution of continuous pre-grouting throughout different rock tunneling works in Sweden. However, there is still a large variety in grouting designs as well as in performance between, and even, within projects. In order to make sealing of tunnels more efficient the Swedish Transport Administration has initiated a project to establish a unified design approach for rock fissure grouting in hard crystalline rock. The aim of the design approach is to have a coherent and structured process and methodology for grouting design, resulting in an appropriate, similar and transparent design approach independent of designer. The purpose is thus to introduce explicit guidelines for grouting design and its presentation as grouting classes that will be used in technical specifications, bill of quantities and prognosis for further procurement of grouting works in performance contracts. The improved tendering document should result in reduced costs due to efficient design works followed by an easier procurement process for performance contracts along with improved grouting performance and hopefully also less claims/disputes. The design approach is not yet implemented. However, the design approach is based on known theories and experience that are now compiled into one comprehensive methodology.
机译：一般而言，瑞典的所有隧道合同均基于性能合同。在过去的几十年中，在瑞典，人们大多使用胶结的岩石裂隙灌浆来封闭岩石隧道，这方面的知识和理解已大大增加。不断增长的专业知识来自于瑞典各地不同岩石隧道工程的广泛研究和连续预灌浆的执行。但是，灌浆设计以及项目之间甚至项目内部的性能仍然存在很大差异。为了提高隧道的密封效率，瑞典运输管理局启动了一个项目，以建立统一的设计方法来对硬质结晶岩中的岩石裂缝进行灌浆。设计方法的目的是为灌浆设计提供一个连贯，结构化的过程和方法，从而产生一种与设计者无关的适当，相似和透明的设计方法。因此，目的是为灌浆设计引入明确的指导原则，并将其作为灌浆类别进行介绍，这些灌浆类别将用于技术规范，工程量清单和预后，以进一步采购性能合同中的灌浆工作。改进的招标文件应能降低成本，这是由于有效的设计工作，随后的履约合同采购流程更容易，同时灌浆性能得到改善，希望索赔/争议减少。该设计方法尚未实现。但是，设计方法是基于已知的理论和经验，这些理论和经验现在已被汇编为一种综合的方法论。

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