Water outburst and mud outburst excavation simulation device and method of simulating water outburst and mud outburst disasters

Abstract

The invention relates to a water outburst and mud outburst excavation simulation device which comprises a base, a test chamber, a pressurizing device which pressurizes vertically and a water inlet, wherein two excavation inlets are formed in one side of the test chamber and are separately located in the upper and lower sides of the test chamber; a tunnel is excavated toward the chamber through the excavation inlet in the upper side or in the lower side; a rock body similar material and a karst cavity are formed in the test chamber, and the rock body similar material surrounds the karst cavity; and the test chamber is formed in the base, the pressurizing device is arranged on the top of the test chamber, and the water inlet is also formed in the test chamber. The invention also relates to a method of simulating by means of the device. The device provided by the invention is great in rigidity, high in strength, relatively good in sealing property and accurate in measuring data, can simulate a water outburst and mud outburst rule in a karst tunnel excavating process in different positions and under different filling conditions and different pressure conditions, and is wide in application range.

Description

technical field [0001] The invention relates to a water and mud inrush excavation simulation device, in particular to a device for simulating hidden karst water and mud inrush disasters during the excavation process of high-speed railway tunnels, and also relates to a method for simulating water and mud inrush disasters, belonging to High-speed railway tunnel engineering field. Background technique [0002] The total area of ​​karst areas in China is about 3.44×106km 2 , of which, the exposed karst area is 9.07×105km 2 . Southwest is dominated by Yunnan, Guizhou and Guangxi, including parts of Sichuan, Chongqing, Hubei and Hunan, with a karst area of ​​5.0×105km 2 , More than 80% of the area of ​​Guizhou Province is soluble rock. The construction and operation of high-speed railways in karst mountainous areas are largely restricted by the complex geological environment and hydrogeological conditions. On the one hand, the existence of hidden karst caves in the tunnel sur...

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Problems solved by technology

However, in the actual simulation process, due to the many factors affecting the process of water and mud inrush in hidden karst tunnels, the relevant physical simulation devices for water and mud inrush are more or less defective. For example, the patent CN101231226B discloses a large-scale rock test A sample high-pressure penetration test device, but it is only for rock sample testing; patent CN101308126A discloses a simulation device for excavation water inrush, but its maximum water pressure is only 1MPa, which cannot meet the requirements of tunnel water inrush under the action of high pressure water. Mud test simulation requirements; patent CN204855131U discloses a water and mud inrush test device for structural fissure filling structures. Although it can simulate water and mud inrush under high pressure conditions, it cannot realize water and mud inrush under excavation conditions. mud simulation, it is also difficult to find out the corresponding law of water and mud inrush

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