An underwater traffic tunnel that includes a body immersed in water, a connector, and a ventilation system. The body comprises a first cavity for providing a passage space and a second cavity located below the first cavity. The second cavity is in communication with water; the connector connects the body and the water bottom and is used to resist buoyancy, and the ventilation system is in communication with the first cavity and extends above the water surface; the body of the present invention is safely immersed in water, and a vessel can navigate freely above the body; the second cavity is in communication with water and is not easy to be overturned by seawater; the connector resists buoyancy; the ventilation system can prevent damage by external forces through deformation and movement, and an escape system can be activated in emergency situations.

A high-speed transportation system, the system including at least one transportation path having at least one track, at least one transportation vehicle configured for travel along the at least one transportation path, a propulsion system adapted to propel the at least one transportation vehicle along the at least one transportation path; and a levitation system adapted to levitate the transportation vehicle along the at least one transportation path. The at least one transportation vehicle additionally comprises wheels for at least intermittently supporting the transportation vehicle on the at least one track.

A high-speed transportation system, the system including at least one transportation path having at least one track, at least one transportation vehicle configured for travel along the at least one transportation path, a propulsion system adapted to propel the at least one transportation vehicle along the at least one transportation path; and a levitation system adapted to levitate the transportation vehicle along the at least one transportation path. The at least one transportation vehicle additionally comprises wheels for at least intermittently supporting the transportation vehicle on the at least one track.

The present disclosure provides a sea tunnel, and relates to the technical field of sea-crossing bridge tunnels. The sea tunnel comprises a body; and the body has a hollow cavity extending from one end to the other end, the cavity is divided into mutually independent first cavity and second cavity by a passage pavement, the first cavity is mainly used for passing and is wholly or partly protruded out of the sea level, the second cavity is immersed in the seawater, water holes are formed in the second cavity, and the second cavity is communicated with the seawater through the water holes. When the seawater impacts one side of the body, the second cavity is immersed in the seawater, and the seawater flows into the second cavity, so the body is not easy to be flushed over by the seawater.

In one or more arrangements, a lagoon entry system and method of retrofitting a lagoon entry system to a covered lagoon is presented. In one or more arrangements, the lagoon entry system includes a center wall connected to an interior portion, an exterior portion, and a gate complex. The gate complex includes a gate which is configured to provide selective access into the covered lagoon, namely access by a submersible robot cleaner configured to clean the floor of the covered lagoon. In one or more arrangements, the lagoon entry system is retrofitted to a covered lagoon by cutting a hole in the cover of the covered lagoon, excavating material from an interior area located inside the covered lagoon and an exterior area located outside the lagoon. Once the interior area and exterior area have been excavated, the center wall, interior portion, and exterior portion can be placed and properly connected.

In one or more arrangements, a lagoon entry system and method of retrofitting a lagoon entry system to a covered lagoon is presented. In one or more arrangements, the lagoon entry system includes a center wall connected to an interior portion, an exterior portion, and a gate complex. The gate complex includes a gate which is configured to provide selective access into the covered lagoon, namely access by a submersible robot cleaner configured to clean the floor of the covered lagoon. In one or more arrangements, the lagoon entry system is retrofitted to a covered lagoon by cutting a hole in the cover of the covered lagoon, excavating material from an interior area located inside the covered lagoon and an exterior area located outside the lagoon. Once the interior area and exterior area have been excavated, the center wall, interior portion, and exterior portion can be placed and properly connected.

The present disclosure provides a sea tunnel, and relates to the technical field of sea-crossing bridge tunnels. The sea tunnel comprises a body; and the body has a hollow cavity extending from one end to the other end, the cavity is divided into mutually independent first cavity and second cavity by a passage pavement, the first cavity is mainly used for passing and is wholly or partly protruded out of the sea level, the second cavity is immersed in the seawater, water holes are formed in the second cavity, and the second cavity is communicated with the seawater through the water holes. When the seawater impacts one side of the body, the second cavity is immersed in the seawater, and the seawater flows into the second cavity, so the body is not easy to be flushed over by the seawater.

The present application discloses a prestressed tube section structure and a construction method thereof. The prestressed tube section structure includes multiple successively connected segments. A shear-resistant structure and a water stop system are arranged between two segments; multiple prestressing tendons are arranged in the tube section along the circumferential direction of the tube section; and each prestressing tendon is communicated along the longitudinal direction of the tube section, and is partitioned into multiple sections at a position close to a segment joint. By the arrangement of the multiple successively connected segments of the present application, the shear-resistant structure and the water stop system are arranged between the two segments, so that a portion between two segments may bear a shear force and have watertightness; the arrangement of the multiple prestressing tendons in the tube section enables the multiple segments to be connected in series and spliced into a whole; in addition, each prestressing tendon is partitioned into multiple sections at the position close to each segment joint, so that the tube section has higher flexibility on the premise of not losing the overall rigidity, and the loading capacity and deformability of each segment are effectively improved; and a proper pressure is applied between two segments, so that the tube section has higher deformability to adapt to a subsea foundation bed.

A method of monitoring tube integrity of a high-speed transportation system. The high-speed transportation system includes at least one tube structure having at least one track, at least one capsule configured for travel through the at least one tube structure between a plurality of stations, a propulsion system adapted to propel the at least one capsule through the structure, and a levitation system adapted to levitate the capsule within the structure. The tube structure is maintained as a low-pressure environment. The method includes directing a vehicle having at least one sensor along a tube path; and detecting a plume of air leaked from the low-pressure environment using the at least one sensor.

A method of monitoring tube integrity of a high-speed transportation system. The high-speed transportation system includes at least one tube structure having at least one track, at least one capsule configured for travel through the at least one tube structure between a plurality of stations, a propulsion system adapted to propel the at least one capsule through the structure, and a levitation system adapted to levitate the capsule within the structure. The tube structure is maintained as a low-pressure environment. The method includes directing a vehicle having at least one sensor along a tube path; and detecting a plume of air leaked from the low-pressure environment using the at least one sensor.