A manhole base assembly and a method for making the same, in which a non-cylindrical, low-volume concrete base is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures using existing, standard sets of form assembly materials, and may also be used in conjunction with industry-standard cylindrical casting jackets for compatibility with existing casting operations. The resulting system provides for flexible construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

An apparatus and method is provided for lining the wall of a manhole. The apparatus may include a liner assembly. The liner assembly includes a bladder, a liner holding device, and a liner. The bladder comprises a first end positioned near an opening of the manhole, and a bladder body positioned in the manhole. The liner holding device is positioned at least partially above the opening of the manhole. The liner includes a first end operably connected to the holding device, and a liner body positioned at least partially surrounding the bladder in the manhole. The liner holding device is adapted to feed a portion of the liner body into the manhole during expansion of the liner body.

The present invention comprises a method and means for repairing the wall of a manhole wherein a material capable of curing and hardening is adhered to the wall. An expandable bladder engages the curable and hardenable material and presses against and smoothes the material. The bladder may be chemically bonded to the curable and hardenable material or it may be mechanically bonded.

A manhole assembly comprising a plurality of interconnected longitudinal manhole segments is provided. In an embodiment, the plurality of interconnected longitudinal manhole segments may comprise a first edge comprising a plurality of dowel pins, a second edge comprising a plurality of dowel holes, a curved wall extending between the first edge and the second edge, and a plurality of clip bosses extending periodically along the first edge and the second edge. In another embodiment, the plurality of interconnected longitudinal manhole segments may comprise a plurality of hinges extending periodically along the first edge and the second edge.

A manhole assembly comprising a plurality of interconnected longitudinal manhole segments is provided. In an embodiment, the plurality of interconnected longitudinal manhole segments may comprise a first edge comprising a plurality of dowel pins, a second edge comprising a plurality of dowel holes, a curved wall extending between the first edge and the second edge, and a plurality of clip bosses extending periodically along the first edge and the second edge. In another embodiment, the plurality of interconnected longitudinal manhole segments may comprise a plurality of hinges extending periodically along the first edge and the second edge.