External water pressure testing device and method for water-rich karst tunnel lining

Abstract

The invention relates to an external water pressure testing device and method for a water-rich karst tunnel lining and belongs to the technical field of tunnel engineering. The external water pressure testing device comprises a drainage device, an external water pressure measuring device and a switching device, wherein the drainage device consists of an internally-threaded attachment joint and a steel transverse water manifold; the external water pressure measuring device consists of a three-way joint, a communicating pipe and a water pressure gauge; the switching device consists of a flange ball valve; the attachment joint is connected with the transverse water manifold; the transverse water manifold is connected with one end of the three-way joint; the intermediate end of the three-way joint is connected with the water pressure gauge through the communicating pipe; and the third end of the three-way joint is connected with the flange ball valve through the transverse water manifold. The external water pressure testing device is reasonable in design, the testing method is reliable, the application is convenient, the external water pressure of the water-rich karst tunnel lining can be effectively measured, particularly, the maximal water pressure value generated at the back of the lining due to the failure of a drain hole during operation of a water-rich karst tunnel can be tested, and accordingly main references are provided for both the design of a tunnel lining structure and selection of an opportunity to dredge crystals at the drain hole during operation.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and relates to a water-rich karst tunnel lining external water pressure testing device and a testing method, in particular to a water-rich karst tunnel lining external water pressure testing device and lining external water under different drainage hole failure section lengths Stress testing method. Background technique [0002] Traffic engineering is an important infrastructure of the country and occupies a very important position in the development of the national economy. In the Yunnan, Guizhou, and Sichuan regions, the administrative divisions of many cities are divided by mountains. In order to speed up the flow of people and goods between urban areas and relieve the pressure on urban public transport, it is necessary to build a large number of inter-urban traffic tunnels in mountainous areas, including road tunnels, railway tunnels, and subway tunnels. However, the tunnel sites...

AI Technical Summary

Problems solved by technology

However, there is no test device and method for the external water pressure of the lining structure of the water-rich karst tunnel in the relevant domestic codes or test procedures.

Images