Internal water pressure loading device for water tunnel structure model test

Abstract

The invention discloses an internal water pressure loading device for a water tunnel structure model test. The internal water pressure loading device comprises two parts, namely a rubber airbag pressurization device and an air supply and pressure maintaining device, wherein the structure of the rubber airbag pressurization device is as follows: a circular cylindrical airbag is formed by a rubber wall on the outer side, a stainless steel on the outer side, and stainless steel flange rings at the upper and lower ends in a sealed manner; air transmission holes are formed in the stainless steel flange rings; the air supply and pressure maintaining device has the structure that: a CO2 source, a three-position rotary valve, a gas-pressure meter and the air transmission holes are sequentially connected with one another. According to the device disclosed by the invention, the tunnel model can be subjected to internal water pressure loading, and the effect and influence of the internal water pressure on the tunnel structure are simulated. When matched with the existing tunnel external water and soil pressure loading device, the device can simulate the mechanical properties and failure modes of a water tunnel in a tunnel lining under the actions of different internal water pressures and external water and soil pressure loads, so that a scientific and reliable test basis can be provided for structural design and construction of the water tunnel. Therefore, the construction and operation safety of the tunnel can be guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of civil engineering, and particularly relates to the technical field of water conveyance tunnel model tests. Background technique [0002] In recent years, the sewage pipe network in many cities has been operating under pressure for a long time, the serious overflow pollution of sewage and the frequent flood disasters have highlighted that the drainage pipe network of most cities in my country can no longer meet the needs of urban development. Reconstruction, expansion and new drainage The system is imminent. Urban deep tunnel drainage has been used for many years in some countries, such as the Tokyo Circle Drainage System in Japan, the Paris Urban Drainage System in France, and the Deep Tunnel Sewage System in Singapore, etc., which give full play to the functions of flood prevention and drainage and overflow pollution control. Outside the Lai Chi Kok rainwater deep tunnel system, there is no deep tunnel drainag...

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Problems solved by technology

[0002] In recent years, the long-term pressurized operation of sewage pipe networks in many cities, serious overflow pollution of sewage, and frequent flood disasters have highlighted that the drainage pipe networks of most cities in my country can no longer meet the needs of urban development. Reconstruction, expansion and new drainage system imminent

Urban deep tunnel drainage has been used for many years in some countries, such as the drainage system in Tokyo, Japan, the urban drainage system in Paris, France, and the deep tunnel sewage system in Singapore. Except for the Lai Chi Kok rainwater deep tunnel system, there is no deep tunnel drainage project. In recent years, with the proposal of the concept of sponge city in my country, the deep drainage of cities such as Guangzhou, Wuhan and Chengdu is being planned, designed and constructed.

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