Segment with concrete embedded with fluid-filled steel pipes

A segment with concrete embedded with fluid-filled steel pipes, the segment comprising:

• a concrete portion, wherein the concrete portion serves as a main stress component of the segment, is made of ultra-high performance concrete and is provided with a hollow portion for arranging the fluid-filled steel pipes;
• a steel pipe portion, wherein the steel pipe portion comprises the fluid-filled steel pipes uniformly arranged on a tension side of the segment and penetrating through the entire segment in a circumferential direction, and a fluid filling system and a pressure control system connected to the fluid-filled steel pipes;
• a reinforcing bar portion, wherein the reinforcing bar portion comprises longitudinal bars for bearing a tension, stirrups for bearing a shear force and supports;
• and
• a joint portion, wherein the joint portion comprises circumferential seam joints and longitudinal seam joints, each of the circumferential seam joints comprises a circumferential seam hand hole and an inclined bolt, and each of the longitudinal seam joints comprises a steel plate connector, a longitudinal seam hand hole and a straight bolt, wherein fluid filling valves are arranged in steel pipe spans and are used to ensure uniform distribution of an initial stress in the fluid-filled steel pipes, the pressure control system comprises pressure monitoring devices and pressure stabilizing devices are arranged at two ends of the fluid-filled steel pipes, the pressure monitoring devices are used to monitor an internal pressure of the fluid-filled steel pipes in real time,
• wherein when an internal pressure exceeds a preset internal pressure, fluids in the fluid-filled steel pipes are released by the pressure stabilizing devices to maintain a pressure balance in the fluid-filled steel pipes, and an overall stress and deformation conditions of a tunnel structure are fed back according to a change of a fluid pressure in the fluid-filled steel pipes.