Method for determining horizontal consolidation coefficient of saturated soft clay by use of flat dilatometer test C-value dissipation test

A technology of lateral expansion and horizontal consolidation of a flat shovel, which is applied in the field of horizontal consolidation coefficient of saturated soft clay, can solve the problem of not measuring the horizontal consolidation coefficient of soil, and achieve the effects of saving survey costs, obvious effects, and improving efficiency

Active Publication Date: 2017-11-03
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Description
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Problems solved by technology

However, there is currently no in-depth study on the determination of the horizontal consolidation coefficient of soils using the dissipation test of the C value

Method used

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  • Method for determining horizontal consolidation coefficient of saturated soft clay by use of flat dilatometer test C-value dissipation test
  • Method for determining horizontal consolidation coefficient of saturated soft clay by use of flat dilatometer test C-value dissipation test
  • Method for determining horizontal consolidation coefficient of saturated soft clay by use of flat dilatometer test C-value dissipation test

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] A kind of method of the present invention utilizes flat shovel lateral expansion C value dissipation test to measure the horizontal consolidation coefficient of saturated soft clay, comprising the following steps:

[0041] 1) Carry out the dissipation test of the side expansion C value of the flat shovel, and collect the side expansion C of several flat shovels within the test time t value, where the subscript t represents time;

[0042] 2) Draw according to the collected data Dissipation curve;

[0043] 3) According to the The curve determines the initial state value C 0 with steady state value C 100 ;

[0044] 4) Determine the time t for 50% of the C value of the flat shovel to dissipate in the dissipation test 50-C ;

[0045] 5) Calculate the horizontal consolidation coefficient C h :

[0046]

[0047] In the ...

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Abstract

The invention discloses a method for determining the horizontal consolidation coefficient of saturated soft clay by use of a flat dilatometer C-value dissipation test. The method comprises the following steps: performing the flat dilatometer C-value dissipation test to acquire a plurality of flat dilatometer Ct values within the test time, wherein the subscript t represents time; (2)drawing an A dissipation curve; (3) determining an initial status value C0 and a stable status value C100; (4)determining the time t50 C of 50% dissipation of the flat dilatometer C-value dissipation test; and (5) calculating the horizontal consolidation coefficient Ch: as shown in the description. On the premise of not increasing the test technical measures, the problem caused by directly utilizing the flat dilatometer test to test the horizontal consolidation coefficient of the saturated soft clay is solved, the application function of the flat dilatometer test is expanded, the investigation cost is lowered, the efficiency is improved, and the effect is obvious.

Description

technical field [0001] The invention relates to the field of geotechnical engineering investigation, in particular to a method for measuring the horizontal consolidation coefficient of saturated soft clay by using a flat shovel lateral expansion C value dissipation test. Background technique [0002] In my country, soft soils with poor physical and mechanical properties are widely distributed, such as coastal marine soft soils, floodplain soft soils in the Yangtze River Basin, and lacustrine soft soils in various lakes. The construction of infrastructure such as roads and railways is changing with each passing day, which puts forward higher requirements for geotechnical engineering investigation. The consolidation coefficient is a controlling index for the calculation of soil consolidation and settlement. The larger the soil consolidation coefficient, the faster the pore water in the soil is discharged, and the faster the soil layer is consolidated. The relationship between t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 涂启柱储团结熊大生米军吴守富王忠华黄俊杰于廷新张燕
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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