Stormwater Connect Access

For more information about this layer please see the GIS Data Catalog. Components of Access Features--Access Riser: A vertical maintenance access to a Vault, Tank or other similar structure. The access opening is wide enough for entry to support maintenance and inspection.--Cleanout: A Pipe with a cap that allows for cleaning or inspection of the Conveyance System. --Non-Standard Access: An access structure that does not meet the structural requirement of any contemporary design standards.--Maintenance Hole: Maintenance holes connect one Pipe to another Pipe, with an opening to the surface. Structurally, manholes are cylindrical, deeper than wide, has an access opening, and without a Sump. Pipe outlet(s) are at the base of structure, often in “channel and shelf”.--Ventilation Port: An opening with a removeable cap or cover that provides access for artificial ventilation (e.g. confined access blowers) to an underground feature prior to access by maintenance personnel. --Viewing Port: An opening that provides view access to an underground feature for the purpose of inspection.

如需了解该图层的更多信息，请查阅地理信息系统（Geographic Information System, GIS）数据目录。接入设施的组成部分如下：
——接入竖管（Access Riser）：用于通往窖井（Vault）、储罐或其他类似结构的垂直维护通道，其接入开口尺寸足以容纳人员进入，以开展维护与巡检工作。
——清通口（Cleanout）：带盖管道结构，可用于清理或检查输送系统（Conveyance System）。
——非标准接入设施（Non-Standard Access）：不符合现行设计标准结构要求的接入结构。
——检修孔（Maintenance Hole）：用于连接两段管道，带有通至地面的开口。从结构特征来看，检查井（Manhole）为圆柱形结构，深大于宽，设有接入开口且无集水坑（Sump），管道出口设于结构底部，通常采用"槽架式"布置。
——通风口（Ventilation Port）：带有可拆除盖体的开口，用于在维护人员进入地下设施前，为人工通风（如受限空间通风机）提供通风通道。
——观察口（Viewing Port）：用于为巡检人员提供地下设施视野的开口，以满足巡检需求。