1.1 本规范涵盖了由波纹板或薄板制成的铝制箱形涵洞的材料、几何结构和壁截面特性，以及用于现场组装的附加加劲肋。还描述了适当的紧固件和可选材料，如铝倒置板和端墙。铝箱涵的应用包括用于地表水重力流排水的导管，如涵洞和雨水道，以及用于小桥和立交结构，如行人或车辆地下通道和公用工程隧道。 1.2 本规范不包括基础、回填要求，也不包括覆土或活荷载与强度要求之间的关系。AASHTO LRFD中描述了这些重要的设计考虑因素 桥 设计 规范和LRFD桥梁施工规范。 1.3 本规范不包括这些结构的水力设计要求。FHWA HDS No。 5. 1.4 附录X1 列出了常用箱涵尺寸的标称尺寸。还列出了这些尺寸的横截面积和水力设计参数。 1.5 附录X2 列出了制造商建议的本规范中描述的加劲肋类型、间距等级和材料厚度的设计特性。 1.6 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值； 因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.7 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》中确立的国际公认标准化原则制定的。

1.1 This specification covers material, geometric, and wall section properties of aluminum box culverts manufactured from corrugated plate or sheet, with attached rib stiffeners, for field assembly. Appropriate fasteners and optional materials, such as aluminum invert plates and headwalls, are also described. Applications for aluminum box culverts include conduits for gravity flow drainage of surface water, such as culverts and storm drains, as well as for small bridges and grade separation structures such as pedestrian or vehicular underpasses, and utility tunnels. 1.2 This specification does not include requirements for foundations, backfill, or the relationship between earth cover or live loads and strength requirements. These important design considerations are described in the AASHTO LRFD Bridge Design Specifications and the LRFD Bridge Construction Specifications. 1.3 This specification does not include requirements for the hydraulic design of these structures. Hydraulic design, placement of footings or inverts, and end treatments to resist scour are described in FHWA HDS No. 5. 1.4 Appendix X1 lists nominal dimensions of box culvert sizes commonly available. Also listed are cross-sectional area and hydraulic design parameters for these sizes. 1.5 Appendix X2 lists manufacturer's suggested design properties for the rib stiffener types, spacing classes, and material thicknesses described in this specification. 1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.7 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.