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Self-drilling confined water head in-situ test device and usage method

A pressurized water head and in-situ test technology, which is applied to measuring devices, measuring fluid pressure, instruments, etc., can solve the problem that the pressurized water head is difficult to test reliably, and achieve efficient testing, reliable testing, and high reliability.

Active Publication Date: 2017-01-11
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention aims at the deficiencies of the existing underground multi-layer aquifer confined water head testing method, and the present invention proposes a new device for in-situ testing of underground confined hydraulic head and its application method. To solve the technical problem that it is difficult to reliably test the pressure head of the foundation pit and underground engineering dewatering design

Method used

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  • Self-drilling confined water head in-situ test device and usage method
  • Self-drilling confined water head in-situ test device and usage method

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Embodiment

[0050] A new device for in-situ testing of underground pressurized water heads, including a drilling system, an expansion mechanism and a testing system;

[0051] The drilling system includes a power source 1, a water pump 2, a water tank 3, a water pipeline 4, an outer casing 5, an inner hollow drill pipe 6, and a power source 1, a water pump 2, a water tank 3, and a water pipeline 4 Drilling circulating water system, the lower end of the casing 5 is the cutting edge 7, and the lower end of the inner drill pipe 6 is connected to the drill bit 8. The power source 1 provides downward power for the casing 5 and the inner drill pipe 6 to drill in the soil ;

[0052] The expansion mechanism is composed of an expansion film 9, an expansion film protective cover 10, a high-pressure gas or liquid bottle or pump 11, a vent tube 12 and a controller 13, wherein the high-pressure gas or liquid bottle or pump 11 is expanded through the vent or liquid tube 12 The expansion of the membrane 9 pr...

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Abstract

The invention discloses a self-drilling confined water head in-situ test device and a usage method thereof. The device comprises a drilling system, an expansion mechanism and a test system. A cutting edge is installed at the bottom end of an outer casing. A drill head is connected to the bottom of an inner rod. The expansion mechanism is fixed to a specific position of the middle-lower part of the outer casing. An osmometer is built in the lower end of the inner rod in the test process. The lower parts of the outer casing and the inner rod are trepanning floral tubes and inside provided with permeable steel filter screen. The device utilizes the cooperation of the inner rod / outer casing to achieve self-drilling to the specific aquifer position, in order to reduce disturbance of the stratum. The expansion of the expansion mechanism on the outer casing enables sealing barrier of the upper and lower aquifers, and the built-in osmometer is used for testing a confined water head, so that effective test of water heads of different aquifers is available. The device overcomes the problem that the existing pre-drilling holing water head observation is low in precision and efficiency, and unreliable.

Description

Technical field [0001] The invention belongs to the technical fields of civil engineering, traffic engineering, and environmental engineering, and specifically relates to a self-drilling pressurized water head in-situ test device and a use method thereof. Background technique [0002] The engineering geological body involved in the development of urban underground space is often a groundwater circulation system including a phreatic aquifer and multiple confined aquifers. Therefore, deep foundation pits and underground engineering decompression and precipitation have become an important link that affects construction safety and construction efficiency , Has always been one of the difficult problems in engineering construction, and accurate and reliable testing of the pressure head of underground multi-layer aquifers is the key to precipitation design. [0003] At present, the test of underground confined water level at home and abroad mainly adopts the method of drilling observation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L11/00G01L19/00
CPCG01L11/00G01L19/00
Inventor 童立元张明飞孟长江万义辉郭俊车鸿博
Owner SOUTHEAST UNIV
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