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A model test device and method for bridge pile foundation scour based on transparent soil

A model test device and transparent soil technology, which can be used in foundation structure tests, foundation structure engineering, construction, etc., can solve the problems that cannot be used to measure the deformation characteristics of the river bed, it is difficult to embed sensors, and the flow field around the pile foundation is disturbed. problems, to achieve the effect of improving scientific research efficiency, convenient test operation, and reducing waste

Active Publication Date: 2020-12-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional flume device is mainly aimed at the measurement of the range above the river bed, including flow velocity measurement, water level measurement, topographic measurement, etc., and cannot be used to measure the deformation characteristics inside the river bed
[0004] However, the soil around the pile foundation is the main object of scour, it is difficult to embed sensors in it, and it is likely to interfere with the flow field around the pile foundation

Method used

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  • A model test device and method for bridge pile foundation scour based on transparent soil
  • A model test device and method for bridge pile foundation scour based on transparent soil
  • A model test device and method for bridge pile foundation scour based on transparent soil

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Effect test

Embodiment 1

[0041] This embodiment discloses a bridge pile foundation scour model test device based on transparent soil, including a circulating water tank system, a transparent soil simulation system and an imaging device.

[0042] see figure 1 , the circulating tank system includes a tank support frame 1, a tank 2, a connecting pipe 3, a flow pump 4 and a frequency conversion governor 5, the tank support frame 1 is a rectangular box with an open upper end and a hollow interior, and the tank support frame 1 A tank 2 is installed at the upper end of the tank, and a connecting pipe 3 is arranged inside the tank support frame 1 . The tank support frame 1 is fixed on the ground to support and stabilize the test device and provide the required reaction force.

[0043] see figure 2 , the connecting pipe 3 includes a main pipe 301 and a bypass pipe 302, the main pipe 301 is U-shaped, the main pipe 301 includes a horizontal pipe section and two vertical pipe sections, the horizontal pipe sect...

Embodiment 2

[0053] This embodiment discloses a bridge pile foundation scour model test method based on transparent soil, based on the test device described in Example 1, comprising the following steps:

[0054] 1) Make the model pile foundation 10 according to the designed size.

[0055] 2) The circulating fluid 8 and the transparent soil 9 are formulated based on similarity criteria, transparent soil technology, river flow environment and riverbed geological environment engineering data. Wherein, the tracer particles 7 screened are added to the circulating fluid 8 and stirred evenly, and the tracer dye 6 is added to the transparent soil 9 and stirred evenly, so that the transparent soil 9 and the circulating fluid 10 are distinguished.

[0056] 3) Install the circulating water tank system, assemble the tank support frame 1, the tank 2, the connecting pipe 3, the flow-making pump 4 and the frequency conversion speed controller 5 according to the design drawings, inject the circulating flu...

Embodiment 3

[0065] This embodiment discloses a bridge pile foundation scour model test device based on transparent soil, including a circulating water tank system, a transparent soil simulation system and an imaging device.

[0066] see figure 1 , the circulating tank system includes a tank support frame 1, a tank 2, a connecting pipe 3, a flow pump 4 and a frequency conversion governor 5, the tank support frame 1 is a rectangular box with an open upper end and a hollow interior, and the tank support frame 1 A tank 2 is installed at the upper end of the tank, and a connecting pipe 3 is arranged inside the tank support frame 1 .

[0067] see figure 2 , the connecting pipe 3 includes a main pipe 301 and a bypass pipe 302, the main pipe 301 is U-shaped, the main pipe 301 includes a horizontal pipe section and two vertical pipe sections, the horizontal pipe section is installed on the bottom of the sink support frame 1, and the two vertical pipe sections The straight pipe sections are resp...

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Abstract

The invention discloses a bridge pile foundation scouring model test device and method based on transparent soil. The bridge pile foundation scouring model test device comprises a circulating water tank system, a transparent soil simulation system and an imaging device, wherein a stream pump, an adjusting valve and an electromagnetic flowmeter which are mutually spaced communicate between an inletand an outlet in the two ends of a water tank of the circulating water tank system through a connecting pipeline, the stream pump is driven by a variable-frequency governor, the transparent soil simulation system comprises circulating fluid and transparent soil which are prepared based on a similarity criterion, the circulating fluid, the transparent soil and model pile foundation are distributedin the water tank according to the design, during a test, two laser emitters form two speckle tangent planes inside the circulating fluid and the transparent soil, the stream pump is driven to enablethe circulating fluid to flow, two industrial cameras record the change of a speckle field, the test method of the device comprises the following steps of molding, transparent material preparation, fluid scouring and the like. According to the device, dynamic evolution of a scouring pit and visual measurement of a displacement field and a flow field in the pile foundation scouring process are achieved, operation is convenient, and data are comprehensive.

Description

technical field [0001] The invention relates to the technical field of civil and water conservancy engineering visualization model tests, in particular to a bridge pile foundation scour model test device and method based on transparent soil. Background technique [0002] Scouring is one of the important factors causing bridge pile foundation damage. Bridge pile foundations are generally located in a very complex water environment, and the erosion will cause the loss of soil around the bridge pile foundation to form scour pits, which seriously threatens the service safety of bridges. Among them, the formation of scour pits often causes changes in the pile foundation-soil interaction and deformation of the soil around the pile foundation, which is directly related to the bearing capacity of the bridge pile foundation and has very important practical significance. [0003] The current research on bridge pile foundation scour mainly includes theoretical analysis, field observat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 周航殷峰丁选明王增亮申航余昊陈烨
Owner CHONGQING UNIV
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