Method for measuring water level and water head height of confined aquifer by pore pressure static cone penetration test

A technology for pore pressure static penetration and confined aquifer, which is applied in groundwater detection/exploration, measurement device, water resource assessment, etc. The effect of low cost, low cost and rapid test

Active Publication Date: 2017-08-29
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the prior art, and propose a method for determining the water level and head height of a confined aquifer by pore pressure static contact, directly and quickly testing the water level and head height of a confined aquifer, and solving the current problems. Difficult to measure water level and water head in confined aquifers

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  • Method for measuring water level and water head height of confined aquifer by pore pressure static cone penetration test
  • Method for measuring water level and water head height of confined aquifer by pore pressure static cone penetration test
  • Method for measuring water level and water head height of confined aquifer by pore pressure static cone penetration test

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] In the present invention, a method for determining the water level and water head height of a confined aquifer by pore pressure static contact detection comprises the following steps:

[0036] 1) The pore pressure static penetrating penetration test is carried out on the soil layer in the measurement area.

[0037] 11) Arrange the test hole position of the static sounding hole, and determine the test depth H.

[0038] According to the geotechnical engineering survey data, determine the hole position that needs to be tested at the survey site, and measure the setting out. According to the geotechnical engineering survey data, determine the depth of the confined aquifer that needs to be tested, that is, the test depth H.

[0039] 12) Install counter force device and penetration equipment ( figure 1 , figure 2 ).

[0040] Lev...

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Abstract

The invention discloses a method for measuring the water level and the water head height of a confined aquifer by the pore pressure static cone penetration test. The method comprises steps of 1) carrying out the pore pressure static cone penetration test on the soil layer of the measured area; 2) according to the soil layer divided by the pore pressure static cone penetration test, determining the aquiclude and the confined aquifer, and determining the top buried depth H1 of the confined aquifer; 3) collecting the pore pressure dissipation test stabilization pore water pressure value u0 in the confined aquifer; and 4) calculating the water level h and the water head height hw of the confined aquifer, wherein the calculation formulas are hw=(u0-[gamma]wD) / [gamma]w=u0 / [gamma]w - D (1) and h=H1 - hw (2), hw indicates the pressure head height of the top surface of the confined aquifer; [gamma]w represents the water weight, taking 10kN / m3; H is the test depth; H1 is the top surface buried depth of the confined aquifer; D is the distance from the hole pressure filter of the pore pressure static cone penetration probe to the top surface of the confined aquifer D = H-h; u0 indicates the pore pressure dissipation test stabilization pore water pressure value at the confined aquifer test depth; h represents the buried depth of the water level of the confined aquifer.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering survey, in particular to a method for determining the water level and water head height of a confined aquifer by means of pore pressure static contact. Background technique [0002] In geotechnical engineering investigation, the water level and water head height of the confined aquifer are important hydrogeological parameters, especially for the calculation of the anti-inrush stability of the deep foundation pit engineering. At present, in the geotechnical engineering investigation, in order to obtain accurate water level and water head height of the confined aquifer, the hydrological observation hole of the confined aquifer must be set separately. The metal round pipe wrapped with the filter screen reaches the confined aquifer, and a certain grade of sandstone (as reverse filter material) is filled between the outer side of the metal round pipe and the borehole wall to the roof o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/02
CPCG01V9/02Y02A90/30
Inventor 涂启柱熊大生王忠华黄俊杰于廷新张燕谢凡
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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