Two-dimensional physical simulation testing system for deeply-buried tunnel water bursting hazard and testing method thereof

Abstract

The invention discloses a two-dimensional physical simulation testing system for deeply-buried tunnel water bursting hazard. The two-dimensional physical simulation testing system comprises a rigid testing box, a water pressure servo control system, a vertical loading system, pressure stress sensors and seepage pressure sensors. The rigid testing box is of the cubic structure with an opening arranged on the top. The frontal side surface of the rigid testing box is a high intensity glass plate. The high intensity glass plate is provided with a reserved tunnel portal. Rock-like materials are paved inside the rigid testing box, and a karst cave hollow cavity is arranged in a predetermined position. The pressure stress sensors and the seepage pressure sensors are arranged around the karst cave hollow cavity and a tunnel. The karst cave hollow cavity is communicated with the water pressure servo control system through a high pressure water pipe. A setting load value is loaded by the opening on the top of the rigid testing box through the vertical loading system. The two-dimensional physical simulation testing system has the advantages that the structure is simple, the rigidness is strong and water-sealing capability is good. The two-dimensional model testing system and the method of the two-dimensional model testing system enable a more direct observation on surrounding rock rupture evolvement characteristics during the tunnel water bursting process.

Description

Technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a test system for simulating the water inrush disaster of a deep buried tunnel and the failure and instability of the surrounding rock of the tunnel. Background technique [0002] The catastrophic evolution mechanism of water inrush disasters in deep-buried tunnels is one of the hotspots and difficulties in the scientific research of the National Key Basic Research and Development Plan (973). At present, the buried depth of tunnels in the field of transportation and water conservancy engineering in my country has increased significantly, and the buried depth of kilometers is constantly emerging. The buried depth of the diversion tunnel of Jinping II Hydropower Station even reaches 2525m. The disasters caused by this during the construction period are becoming more and more serious. Among them, water inrush is The major geological disasters that are common in the tunneling pr...

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Problems solved by technology

However, the test system is designed for the Qingdao Jiaozhou Bay Submarine Tunnel. It has its natural defects in the tunnel water inrush test research. For example, the location of the water source cannot be c

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