Water immersion system for centrifugal model test and test method

Abstract

The invention discloses a water immersion system for a centrifugal model test and a test method. Requirements of different water immersion operating conditions in the centrifugal model test are met through setting a centrifugal field water immersion device, the water flow getting into a water immersion control water tank is controlled through an electromagnetic valve, the water immersion control water tank distributes inlet water to each compartments, and water in each compartment permeates into a test simulation material through a corresponding water immersion probe. The water immersion system disclosed by the invention is clear in structure and convenient to manufacture, and has high practical values.

Description

technical field [0001] The invention belongs to the field of centrifugal model tests, and in particular relates to a water immersion system and a test method for centrifugal model tests. Background technique [0002] With the continuous development of underground space, subway tunnels are important urban traffic arteries, and their construction and operation safety cannot be ignored. In order to study the stress and deformation characteristics of subway tunnels under different geological conditions, indoor test simulation research is often required, and centrifugal model test, as a better test method, is widely used in various geotechnical engineering simulation tests. , the use of centrifugal test system for various tests of subway tunnels has become a new trend of research. [0003] Centrifugal test simulation technology uses centrifugal force to simulate gravity. Under Ng conditions, the stress and strain of the small-scale model are the same or similar to the prototype,...

AI Technical Summary

Problems solved by technology

China's geotechnical centrifugal test technology started late, but it has developed rapidly in the past 20 or 30 years, and the centrifugal simulation test technology has also made great progress. The performance of centrifuges is getting better and better, the power is getting bigger, and the performance of various auxiliary equipment is getting better In addition, in order to meet the requirements of various tests, researchers have upgraded the centrifuge test system in an ineffective manner. For example, the patent with the application number "201010263610.2" and the name "Rainfall Simulation System" discloses a centrifugal test system. The experimental rainfall system includes water supply system, pressurization system, rainfall device and model box, but the system must maintain a certain amount of water in the rainfall device in order to ensure the uniformity of rainfall in the rainfall area, so it is difficult to control and obtain relatively Accurate rainfall simulation; the application number is "201410581766.3", and the patent titled "Rainfall simulation method and device for centrifugal model" discloses a rainfall simulation device for centrifugal model, including A rain plate with small holes, at least one installation beam is arranged on the top of the rain plate, and there are multiple rectangular nozzles on the installation beam. The rectangular nozzles are direct pressure type atomizing nozzles, which can realize the simulation of rainfall in the centrifugal field; the application number is " 201320337971.6", the patent titled "Visual centrifuge model test device for rainfall-induced debris flow" also upgraded the centrifuge system, providing a visual centrifuge model test device for rainfall-induced debris flow, including research on rain-induced debris flow in a centrifugal environment The remote adjustable artificial uniform rainfall system and visual dynamic measurement system can better conduct research on debris flow

It can be seen that the current upgrading of the centrifugal test system is mostly focused on the simulation of the rainfall system, and is mostly used in the research of natural disasters such as slopes and debris flows. There is no centrifugal test flooding supporting system for subway tunnel flooding and subsidence disasters. It also brings inconvenience to the research on the mechanical characteristics of the subway tunnel immersion.

Images