本文件的《环境工程混凝土结构规范要求》部分涵盖了环境工程混凝土结构的结构设计、材料选择和施工。此类结构用于输送、储存或处理水和废水、其他液体和固体废物。本规范中使用的固体废物一词包括处置材料的不均匀质量，以及更均匀的农业、工业和矿物废物。该规范还包括对现有环境工程混凝土结构的评估。环境工程混凝土结构受到独特的不同荷载和严重暴露条件的影响，这些条件要求更严格的适用性要求，并可能比非环境工程混凝土结构提供更长的使用寿命- 环境结构。荷载包括正常恒载和活载、土压力荷载、静水压和水动力荷载以及振动设备荷载。暴露包括浓缩化学品、交替湿润和干燥、高速流动液体以及饱和混凝土的冻结和解冻。适用性要求包括液体密封性、气体密封性和耐久性。需要对环境工程混凝土结构进行适当的设计、材料和施工，以生产出密实、耐用、几乎不透水、耐相关化学品、挠度和裂缝有限的可用混凝土。这包括最大限度地减少泄漏，控制环境或地下水的渗透或污染。 该规范介绍了适用于环境工程混凝土结构的ACI 318-05、ACI 318-08和ACI 318-11建筑规范的附加材料和修改部分。评注讨论了委员会在制定ACI 350规范时的一些考虑，以及其与ACI 318的关系。重点是解释一些守则使用者可能不熟悉的条款。对于那些希望更详细地研究某些要求的人，本规范编制过程中提到的许多研究数据都有参考。本准则的章节编号贯穿于评注中。涵盖的主题包括:图纸和规范、检查、材料、混凝土质量、搅拌和浇筑、成型、预埋管道、接头、钢筋细节、分析和设计、强度和适用性、弯曲和轴向荷载、剪切和扭转、钢筋开发、板系统、墙壁、基脚、预制混凝土、预应力混凝土、壳体结构、，折板构件、抗震设计规定和附录A中的替代设计方法。 施工中使用的材料的质量和测试参考适当的标准规范。钢筋的焊接参考适当的AWS标准。液密性和气密性测试标准见ACI 350.1。

The Code Requirements for Environmental Engineering Concrete Structures (Code) portion of this document covers the structural design, materials selection, and construction of environmental engineering concrete structures. Such structures are used for conveying, storing, or treating water and wastewater, other liquids, and solid waste. The term solid waste as used in the Code encompasses the heterogeneous mass of disposed-of materials, as well as more homogeneous agricultural, industrial, and mineral wastes.The Code also covers the evaluation of existing environmental engineering concrete structures.Environmental engineering concrete structures are subject to uniquely different loadings and severe exposure conditions that require more restrictive serviceability requirements and may provide longer service lives than non-environmental structures.Loadings include normal dead and live loads, earth pressure loads, hydrostatic and hydrodynamic loads, and vibrating equipment loads. Exposures include concentrated chemicals, alternate wetting and drying, high-velocity flowing liquids, and freezing and thawing of saturated concrete. Serviceability requirements include liquid-tightness, gas-tightness, and durability.Proper design, materials, and construction of environmental engineering concrete structures are required to produce serviceable concrete that is dense, durable, nearly impermeable, and resistant to relevant chemicals, with limited deflections and cracking. This includes minimizing leakage and control over the infiltration of, or contamination to, the environment or groundwater.The Code presents additional material as well as modified portions of the ACI 318-05, ACI 318-08, and ACI 318-11 building codes that are applicable to environmental engineering concrete structures.The Commentary discusses some of the considerations of the committee in developing the ACI 350 Code, and its relationship with ACI 318. Emphasis is given to the explanation of provisions that may be unfamiliar to some users of the Code. References to much of the research data referred to in preparing the Code are given for those who wish to study certain requirements in greater detail.The chapter and section numbering of the Code are followed throughout the Commentary.Among the subjects covered are: drawings and specifications, inspections, materials, concrete quality, mixing and placing, forming, embedded pipes, joints, reinforcement details, analysis and design, strength and serviceability, flexural and axial loads, shear and torsion, development of reinforcement, slab systems, walls, footings, precast concrete, prestressed concrete, shell structures, folded plate members, provisions for seismic design, and an alternate design method in Appendix A.The quality and testing of materials used in the construction are covered by reference to the appropriate standard specifications. Welding of reinforcement is covered by reference to the appropriate AWS standard. Criteria for liquid-tightness and gas-tightness testing may be found in ACI 350.1.