Experimental system and method for researching dispersion characteristics of cohesive soil

A technology of dispersion characteristics and experimental system, applied in the field of geotechnical engineering, can solve problems such as damage, crack expansion, hydraulic geotechnical structure instability, etc.

Pending Publication Date: 2021-03-19
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal erosion of the existing cracks due to uneven settlement and / or improper filling construction methods will cause the cracks to continue to expand and then fail, and the hydraulic geotechnical structure may be unstable due to the internal erosion process

Method used

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  • Experimental system and method for researching dispersion characteristics of cohesive soil
  • Experimental system and method for researching dispersion characteristics of cohesive soil
  • Experimental system and method for researching dispersion characteristics of cohesive soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Such as figure 1 As shown, an experimental system for studying the dispersion characteristics of cohesive soil in this embodiment includes a water tank 1, a support, a seepage chamber 4, and a seepage water outlet pipe 5 communicating with the seepage chamber 4, and the seepage water outlet pipe 5 is far away from the seepage chamber A measuring cylinder 6 is arranged below one end of 4;

[0095] The support includes a base 21 and a plate 22 arranged above the base 21, the plate 22 is parallel to the base 21, and is vertically arranged between the base 21 and the plate 22 and with the base 21 and the plate 22 A support rod is arranged, and the support rod comprises a first support rod 23 and a second support rod 24 parallel to each other, and scales are arranged on the first support rod 23; the first support rod 23 and the second support rod 24 are arranged at intervals On the base 21 and perpendicular to the base 21 and the plate 22;

[0096] The plate 22 is provided...

Embodiment 2

[0108] The present embodiment provides a kind of method that utilizes the experimental system of research clay dispersive characteristic described in embodiment 1 to carry out the micro-crack erosion characteristic test of dispersive clay, comprising the following steps:

[0109] Step 1. According to the preset unevenness coefficient value (i.e. Cu value), the dispersive cohesive soil is prepared into different graded soil samples respectively, and the graded soil samples are prepared into sample 43 according to the pinhole test standard;

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Abstract

The invention discloses an experimental system for researching dispersion characteristics of cohesive soil. The experimental system comprises a water tank, a bracket and a seepage chamber; the bracketcomprises a base, a plate, a first supporting rod and a second supporting rod; a winch and a fixed pulley are mounted on the plate; a winch rope is arranged on the winch and penetrates through the fixed pulley to be connected with the water tank; a first opening, a second opening and a third opening are formed in the lower portion of the water tank; a water inflow pipe penetrates through the first opening; an overflow pipe is arranged in the second opening; the lower portion of the third opening is connected with a water conveying pipe; thewater conveying pipe is provided with a water pump; afirst gravel layer, a first metal net, a sample, a second metal net and a second gravel layer are arranged in the seepage chamber; a conical cylinder is buried in the sample and communicated with thewater conveying pipe. Position adjustment and height positioning can be conducted on the water tank, water erosion of different scouring forces is achieved, the flow velocity is adjusted through thewater pump, water erosion of different flow velocities is achieved, and sample internal erosion experiments under different hydraulic load conditions can be conducted.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an experimental system and method for studying the dispersion characteristics of cohesive soil. Background technique [0002] Dispersive soil is the soil in which the cohesion between fine particles of clay in low-salinity water mostly disappears or completely disappears, and the particles in star agglomerates disperse into primary clay particles by themselves. This kind of soil has strong self-dispersion ability and low erosion resistance, which can easily cause embankment soil piping, dam failure, etc., and even lead to instability or destruction of engineering and roadbeds. Dispersive cohesive soils are widely distributed, highly destructive to engineering, and difficult to control. Clay dispersion tests are indispensable in geotechnical engineering. [0003] There are reports of engineering accidents caused by the dispersion of soil both at home ...

Claims

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Application Information

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IPC IPC(8): G01N3/56
CPCG01N3/567
Inventor 郑文杰吴艾芳尚森肖伟康农波
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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