Method for measuring penetration rule of moisture in loess foundation
A measurement method and technology for moisture, applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of less research on moisture permeability
Inactive Publication Date: 2016-12-07
NORTHWEST RES INST CO LTD OF C R E C +1
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[0003] Through the analysis of the current research status of similar technologies at home and abroad, it can be seen that most of the previous research on the test pit immersion test only discussed the loess foundation's total self-weight collapsibility deformation and external load under the condition of continuous and sufficient immersion. Under the condition of total collapsible deformation, there are few studies on the water penetration rate in large-thickness collapsible loess foundation under the condition of continuous flooding. The above problems need to be further studied to be solved.
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[0062] Specific embodiments of the present invention will be described in detail below.
[0063] Such as Figure 1~4 As shown, a method for measuring the law of water infiltration in a loess foundation comprises the following steps:
[0064] (1) Excavate the immersion test pit 1, the depth of the immersion test pit 1 is 0.5m lower than the original ground, the diameter of the immersion test pit 1 is not less than 10m and greater than the thickness of the collapsible loess layer (the immersion test pit here is The diameter of the pit is 20 meters);
[0065] (2) In the water immersion test pit 1 obtained in step (1), two exploratory wells 2 with a vertical height of 24.5 meters are dug to the original ground. The two exploratory wells 2 include 1# exploratory well and 2# exploratory well. In the center of the test pit 1, the distance from the 2# exploratory well to the edge of the immersion test pit 1 is 1m.
[0066] (3) On the outside of the water immersion test pit 1 that s...
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Abstract
The invention relates to a method for measuring a penetration rule of moisture in a loess foundation. The method comprises the following steps: (1) excavating a test pit for water immersion test; (2) digging two exploration wells with the vertical height of 24.5 m to the original ground in the test pit for water immersion test; (3) digging seven exploration wells with the vertical height of 24.5 m to the original ground outside the test pit for water immersion test; (4) digging transverse exploration grooves inclined upward in the exploration wells, wherein the transverse exploration grooves in the same exploration well are located on the same vertical line; (5) inserting a TDR moisture meter probe at the end of each transverse exploration groove, connecting all the TDR moisture meter probes with a data acquisition device placed on the ground through coaxial cables, and connecting the data acquisition device with a computer; and (6) transmitting data acquired by the TDR moisture meter probes to the computer in real time, analyzing the data acquired by the TDR moisture meter probes, and analyzing a change curve of water immersion time and volume moisture content.
Description
technical field [0001] The invention belongs to the technical field of testing water infiltration in soil, and in particular relates to a method for measuring water infiltration laws in loess foundations. Background technique [0002] The main regional soil quality in the central and western regions of my country is loess. Studying and mastering the deformation characteristics of loess collapsibility and the law of water infiltration in loess provides a reliable scientific basis for the selection of design parameters such as building foundation treatment measures, treatment depth, waterproof and drainage width, etc. The collapsibility deformation of loess is directly related to engineering safety. In actual engineering construction, engineering accidents often occur due to the lack of research on loess subsidence and seepage rate. [0003] Through the analysis of the current research status of similar technologies at home and abroad, it can be seen that most of the previous...
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IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 武小鹏房建宏徐安花周有禄米纬军屈耀辉刘贺业李奋王新燕
Owner NORTHWEST RES INST CO LTD OF C R E C