US 11,940,366 B1
Centrifugal testing device and method for simulating ground subsidence induced by buried pipeline leakage and infiltration
Yao Tang, Hangzhou (CN); Qingguo Yang, Hangzhou (CN); Bo Huang, Hangzhou (CN); and Yunmin Chen, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed by ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed on Nov. 10, 2023, as Appl. No. 18/388,535.
Application 18/388,535 is a continuation of application No. PCT/CN2023/086065, filed on Apr. 4, 2023.
Claims priority of application No. 202210670677.0 (CN), filed on Jun. 14, 2022.
Int. Cl. G01N 15/08 (2006.01); G01N 3/12 (2006.01); G01N 33/24 (2006.01)
CPC G01N 15/0806 (2013.01) [G01N 3/12 (2013.01); G01N 33/246 (2013.01); G01N 2203/0075 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A centrifugal testing device for simulating ground subsidence induced by buried pipeline leakage and infiltration, comprising a model box, a damaged pipeline model, a servo control system, and a monitoring and sensing system, wherein the model box is internally divided into a front part and a rear part by a chamber partitioning plate; and the chamber partitioning plate is provided with a mounting hole for fixing the damaged pipeline model;
the front part of the model box is provided with a test soil chamber and seepage chambers located at two sides of the test soil chamber; a front end of the damaged pipeline model in the test soil chamber is provided with a crack having an adjustable size; the rear part of the model box is provided with a soil filtration chamber and water circulation supply chambers located at two sides of the soil filtration chamber; a rear end of the damaged pipeline model in the soil filtration chamber is provided with a water inlet and outlet control device; a water-soil separation device is provided below the water inlet and outlet control device; and the chamber partitioning plate is provided with a water level limiting hole for communicating the seepage chamber with the water circulation supply chamber;
the servo control system is configured to resize the crack of the damaged pipeline model and control water levels inside and outside the damaged pipeline model; and the monitoring and sensing system is configured to measure a soil pressure, a water pressure and a soil surface displacement of the test soil chamber and a strain of the water-soil separation device in the soil filtration chamber in real time;
the damaged pipeline model comprises a pipeline body, a front end cover, a rear end cover, and an electric push rod assembly; wherein the pipeline body is fixed into the mounting hole of the chamber partitioning plate through a flange plate; the front end cover and the rear end cover are configured to seal front and rear ends of the pipeline body, respectively; the crack is located at a position of the pipeline body adjacent to the front end cover; the electric push rod assembly is provided at an inner side of the front end cover; and a rubber plug at an end of an electric push rod is configured to resize the crack; and
the soil filtration chamber is separated from the water circulation supply chambers at the two sides of the soil filtration chamber by a pair of baffles; a bottom part of the baffle is provided with a hole for communicating the soil filtration chamber with the water circulation supply chamber; and the water-soil separation device is fixed inside the soil filtration chamber by the baffles and located below the damaged pipeline model.