1.1 本规范适用于混凝土隧道衬砌、耐火材料、隧道结构构件的耐火性能。 1.2 混凝土配合比设计、隧道衬砌和被动防火方法因每个隧道项目而异。因此，尽管有最大和最小限制，剥落测试的结果仅对每次测试期间使用的特定材料和系统有效。 1.3 隧道可能会暴露在地下水中，即使是那些穿过高地的隧道，如山脉、道路盐和维护表面冲洗。应考虑由此产生的潜在不利影响，如这些暴露导致的材料降解。 1.4 应考虑活动接头，并通过试验评估其对整体耐火性的影响。试验应作为一个系统进行。 1.5 由于可能的方法和负载多种多样，本说明书不涉及设备的机械连接方法。然而，应考虑在加热条件下明显影响混凝土温度的方法。应考虑使用附件进行第二次测试以评估效果。附着试验应包括最大直径锚杆、安装最深锚杆和施加在锚杆上的最大载荷。该要求导致测试单个锚或测试多个锚。如果需要测试多个锚，则每个锚都应在其最大载荷下进行测试。 1.6 本规范要求对水平和垂直方向进行测试。对于耐火材料，通常认为水平取向代表最坏情况的测试场景。 1.7 以SI单位表示的值将被视为标准值。括号中给出的值是英寸-磅单位的数学转换，仅供参考，不被视为标准。 1.8 本标准用于测量和描述材料、产品或组件在受控条件下对热和火焰的响应，但其本身并不包含材料、产品或组件在实际火灾条件下的火灾危险或火灾风险评估所需的所有因素。 1.9 火灾测试本质上是危险的。在进行这些试验时，应对人员和财产采取充分的安全措施。 1.10 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.11 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification is applicable to the fire resistance of concrete tunnel linings, fire-resistive materials, and structural tunnel members. 1.2 Concrete mix design, tunnel linings, and passive fire protection methods are specific to each tunnel project. Therefore results of the spalling test are only valid for the specific materials and systems employed during each test, notwithstanding maximum and minimum limitations. 1.3 Tunnels are potentially exposed to ground water, even those passing through elevated terrain, such as mountains, road salt, and maintenance surface washing. Consideration shall be given to potential adverse effects that result, such as material degradation due to these exposures. 1.4 Movement joints shall be considered and their impact on the overall fire resistance shall be assessed by testing. Tests shall be conducted as a system. 1.5 This specification does not address mechanical attachment methods for equipment due to the vast variety of possible methods and loads. However, consideration shall be given to methods that appreciably affect the concrete temperature during the heating conditions. Consideration shall be given to a second test conducted with the attachment to evaluate the effect. The attachment test shall include the largest diameter anchor, the deepest installed anchor, and the largest load applied to the anchor. This requirement results in a single anchor being tested or multiple anchors being tested. If multiple anchors are required to be tested, then each shall be tested under its maximum load. 1.6 This specification requires testing of both horizontal and vertical orientations. For fire-resistive materials, it is generally accepted that the horizontal orientation represents the worst case test scenario. 1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.8 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not, by itself, incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions. 1.9 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.11 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.