Device for determining soil layer in-situ permeability coefficient

A permeability coefficient and in-situ technology, which is applied in the fields of environmental engineering, traffic engineering, and civil engineering, can solve problems such as the difficulty of accurately determining the permeability coefficient of the soil layer, and achieve the effects of high reliability, convenient and quick operation, and strong adaptability

Inactive Publication Date: 2011-11-23
SOUTHEAST UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] technical problem: The purpose of the present invention is to provide a device for measuring the in-situ permeability coefficient of the soil layer, which can effectively solve the problem that the soil layer permeability coefficient is difficult to accurately determine during the dewatering design of the foundation pit project

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  • Device for determining soil layer in-situ permeability coefficient
  • Device for determining soil layer in-situ permeability coefficient
  • Device for determining soil layer in-situ permeability coefficient

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Embodiment Construction

[0019] The present invention will be described below with reference to the accompanying drawings.

[0020] The idea, specific structure, testing method and technical effect of the invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present invention.

[0021] The device for measuring the in-situ permeability coefficient of the soil layer provided by the present invention, the test device includes a pore water pressure measurement module 2 and a downhole pressure water test module 3, which can simultaneously realize the pore water pressure and downhole pressure water test water Pressure and flow velocity, pore pressure (or water pressure) dissipation test, the two modules described have different principles for judging the permeability coefficient of the soil layer, and the permeability of the cohesive soil layer can be well judged by using the pore pressure test and it...

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Abstract

The invention discloses a device for determining a soil layer in-situ permeability coefficient, and the device comprises a multifunctional probe (1) located at the lower end of the device, a miniature water pump (4) and a pressurized water controller (5) which are located on the ground, and a data collector (6); wherein the multifunctional probe (1) is connected to the data collector (6) and the pressurized water controller (5) respectively; the water pump (4) is connected to the pressurized water controller (5); the data collector (6) is connected to the pressurized water controller (5); the miniature water pump (4) supplies water for an under-hole water pressurization test; the pressurized water controller (5) control the flow velocity and water pressure of the water; the data collector (6) performs real-time data collection and storage for hole water pressure, water pressurization test water pressure, and flow velocity, dissipation tests. The invention has strong adaptability, can meet the requirements for large-scale profile tests with different depths, is not only convenient and fast, but also not limited by soil types, and has reliable and accurate test results.

Description

technical field [0001] The invention relates to the fields of civil engineering, traffic engineering and environmental engineering, in particular to a device for measuring the in-situ permeability coefficient of soil layers. Background technique [0002] In Shanghai, Nanjing and other developed coastal areas along the river, in recent years, the construction of high-rise buildings, the construction of large-scale municipal facilities, and the development of a large number of underground spaces such as subway tunnels have promoted the rapid development of foundation pit engineering. , close to the direction of development. However, during the deep excavation of foundation pits, engineering accidents caused by improper groundwater control frequently occur, such as quicksand, piping, excessive ground settlement, etc., causing damage or destruction to surrounding buildings, subway tunnels, large underground pipelines, etc. Therefore, the dewatering design and construction of fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 童立元刘松玉李仁民王强
Owner SOUTHEAST UNIV
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