Two-dimensional test model and method for simulating tunnel excavation stratum loss

• Main Authors: LI GEN, GAN WANWEI, LI JIE, SI YINGYING, LIU QI, WANG ZHIDE, WU HAIGANG
• Format: Patent
• Language: Chinese; English
• Published: 20.05.2022
• Subjects: GYROSCOPIC INSTRUMENTS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING DISTANCES, LEVELS OR BEARINGS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The invention discloses a two-dimensional test model for simulating tunnel excavation stratum loss. The two-dimensional test model comprises a model box and soil layer system, a stratum loss simulation system, a loading system and a monitoring system, wherein the model box and soil layer system comprises a U-shaped movable steel frame and similar soil filled in the U-shaped movable steel frame; the stratum loss system comprises an air bag, a barometer is arranged on the air bag, and the air bag is connected with an air pressure regulating valve and an inflator pump; the loading system is arranged at the upper part of the U-shaped movable steel frame and comprises a component force plate above the similar soil, and a plurality of jacks are arranged on the component force plate; the monitoring system comprises an industrial camera, the industrial camera is arranged on a tripod, and a light compensator is arranged beside the industrial camera. The invention further discloses a two-dimensional test method for sim