A sealing system for sealing a joint of a structure, including a first section having an inner wall, an outer wall and a contact surface extending therebetween, a second section having an inner surface, an outer surface and a contact extending therebetween, the contact surfaces of the first and second sections being in contact with each other, thereby forming a joint. A void is defined by a portion of the contact surface of the first section and a portion of the contact surface of the second section, a port extends from one of the inner surface and the outer surface of the first section to the annular void, and liquid grout disposed in the void and the port.

A manhole cover assembly comprises a base frame, the base frame comprising a base body and a base flange extending laterally outward from the base body. The assembly further comprises a top frame, the top frame comprising a top body disposed annularly about at least a portion of the base body, a top flange extending laterally outward from the top body, and a lip extending laterally inward from the top body.

Apparatus for holding bait including a housing part that can be inserted into a manhole, in particular a sewer manhole or a cable duct manhole, at least one bait platform disposed in the housing part and delimiting at least one passage opening through a rodent can reach a bait disposed on the bait platform and/or a bait held on at least one bait-holding device disposed in the housing part, at least one closing body, which is mounted so that it can be moved relative to the bait platform, wherein the closing body in an open position is moved away from the bait platform, such that the at least one passage opening delimited on the bait-platform side is exposed, and in a closed position is moved toward the bait platform, such that the at least one passage opening delimited on the bait-platform side is closed.

Apparatus for holding bait including a housing part that can be inserted into a manhole, in particular a sewer manhole or a cable duct manhole, at least one bait platform disposed in the housing part and delimiting at least one passage opening through a rodent can reach a bait disposed on the bait platform and/or a bait held on at least one bait-holding device disposed in the housing part, at least one closing body, which is mounted so that it can be moved relative to the bait platform, wherein the closing body in an open position is moved away from the bait platform, such that the at least one passage opening delimited on the bait-platform side is exposed, and in a closed position is moved toward the bait platform, such that the at least one passage opening delimited on the bait-platform side is closed.

A method of repairing a manhole is provided. A mastic material capable of curing and hardening as applied to a lower portion of the manhole, including the barrel, bench, and into at least one pipe line extending from the manhole. A resin saturated liner may also be included into a portion of the pipe extending from the manhole. A manhole liner saturated with a resinous material is then positioned in the manhole, and the manhole liner, pipe liner, and mastic material are configured to cure at approximately the same time to form a homogenous, repaired interior of the manhole, including a portion extending into the pipe. The pipe or pipes can then be repaired in a manner such as inverting a liner or bladder into the pipe. In the addition of an end seal at the juncture between the pipe and manhole is also contemplated for further sealing the juncture.

A method of repairing a manhole is provided. A mastic material capable of curing and hardening as applied to a lower portion of the manhole, including the barrel, bench, and into at least one pipe line extending from the manhole. A resin saturated liner may also be included into a portion of the pipe extending from the manhole. A manhole liner saturated with a resinous material is then positioned in the manhole, and the manhole liner, pipe liner, and mastic material are configured to cure at approximately the same time to form a homogenous, repaired interior of the manhole, including a portion extending into the pipe. The pipe or pipes can then be repaired in a manner such as inverting a liner or bladder into the pipe. In the addition of an end seal at the juncture between the pipe and manhole is also contemplated for further sealing the juncture.

Embodiments of the invention are directed to a protective collar that covers the edges of a manhole or other personnel entryway. One device comprises at least two pieces and a hinge that connects the two pieces, which allows the device to be folded for storage. Another device includes a skirt portion that extends further into the manhole. A further device includes at least one light to provide light into the manhole. A still further device includes a surface port that provides a connecting point for a line, and a subsurface port that provides a connecting point for another line. A still further device includes another portion to cover any equipment that has been inserted into the manhole. A still further device includes at least one rung to assist in personnel in entering and exiting the manhole.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that 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 to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular 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.

A temporary manhole cover and its methods of use are configured to prevent an entire person from falling into a manhole, while providing a unique structure, adjustable in some embodiments, that allows access for a user to simultaneously reach through and/or pass objects through the temporary manhole cover when it is installed in a manhole. The structure may include an annular perimeter portion optionally having an L-shaped cross-section defining a circular interior opening there-through, a first set of two parallel laterally-separated cross-members each attached with and extending across the circular opening, and a second set of two parallel laterally-separated cross-members each extending perpendicularly between and attached with the first set of two parallel laterally-separated cross-members.

A method and device for controlling EM radiation from an exposed manhole around roadways. A remote field unit controller is disposed under a manhole cover proximal to a roadway, with a sensor attached to either the manhole cover, a manhole, or the remote field unit controller, providing information of at least one of a position, acceleration, direction of the manhole cover. An EM transmitter/receiver and EM emitter/absorber are disposed under the manhole cover and an EM controller communicates to the EM transmitter. When the sensor detects sufficient movement of the manhole cover, a signals is sent to the remote field unit controller to at least one of suppress, alter, and turn off EM emissions from the EM transmitter so as to prevent EM radiation from entering the roadway.