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Centrifugal model test device for simulating ground collapse induced by damaged non-pressure pipeline

A test device and pipeline technology, applied in the field of civil engineering, can solve unseen problems

Active Publication Date: 2021-06-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no centrifugal model test device that uses a centrifuge test to simulate ground collapse induced by damaged non-pressure pipelines

Method used

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  • Centrifugal model test device for simulating ground collapse induced by damaged non-pressure pipeline
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  • Centrifugal model test device for simulating ground collapse induced by damaged non-pressure pipeline

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Embodiment Construction

[0040] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Using the centrifuge test technology in the Ng hypergravity field, the scale and time-lapse effects of the geotechnical model can reproduce the ground collapse process induced by the damaged unpressurized pipeline in the city under the action of the real stress level, and reveal the pore water pressure during the ground collapse p...

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Abstract

The invention discloses a centrifugal model test device for simulating the ground collapse induced by a damaged non-pressure pipeline. The centrifugal model test device comprises a base, a lower water storage tank, an upper model box, a water pump, a servo control system, a turbidity meter and a high-speed camera, wherein the lower water storage tank and the upper model box are mounted on the base. The model box comprises two water permeable plates, a pipeline simulating damage, a transparent window, a pore pressure sensor used for measuring the water level, a pore pressure sensor used for monitoring the pore water pressure in foundation soil and a laser displacement sensor. The water storage tank is in an inverted-T shape and comprises a water permeable plate, a muddy water collecting funnel and a flow meter. According to the present invention, by utilizing the scale reduction and time reduction effects of a geotechnical model under an Ng high gravity field and by utilizing a centrifugal machine test technology, and the occurrence and evolution process of the ground collapse induced by the damaged non-pressure pipeline under the action of a real stress level can be represented.

Description

technical field [0001] The invention belongs to the field of civil engineering, in particular to a centrifugal model test device for simulating ground collapse induced by damaged pressureless pipelines. Background technique [0002] Pressureless pipelines such as urban rainwater and sewage drainage pipelines are important infrastructures to ensure the normal operation of modern cities. Due to reasons such as service time and construction quality, the damage to the pipe wall and joints of non-pressure pipelines is relatively common. In areas with high water table, damaged pipelines will change the boundary of groundwater seepage, and the surrounding soil will form concentrated seepage erosion, which will eventually cause the foundation to collapse and collapse. Such disasters often have the characteristics of concealment and suddenness, and mostly occur in densely populated urban areas, which can easily cause loss of personnel and property. With the aging of pipelines, the ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 唐耀高志成陈云敏黄博
Owner ZHEJIANG UNIV