CN-121976791-A - Direct-measurement type borehole internal pressure water test method and device

CN121976791ACN 121976791 ACN121976791 ACN 121976791ACN-121976791-A

Abstract

The invention discloses a direct-measuring borehole internal pressure water test method and a device, wherein a pressure and flow sensor is arranged at a test section in a borehole, and directly measuring the test pressure in the test section and the permeation flow under the test pressure, and automatically calculating, analyzing and measuring data to form a test result. Human errors caused by manual reading errors, pipeline flow loss calculation, pressure correction and the like are avoided, the accuracy, reliability and working efficiency of test results are effectively improved, and the working cost is reduced.

Inventors

CHEN XINQIU
CHEN DAN
FAN LIAN
LIU YIFEI
XIAO HAIBO

Assignees

中国电建集团北京勘测设计研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260210

Claims (6)

1. A direct-measurement type borehole internal pressure water test method is characterized in that a pressure sensor (1) is arranged at the middle point of a test section in a borehole, a flow sensor (3) is arranged at the lower part of an upper plug (2), test pressure of the test section and seepage flow under the pressure are directly measured, and test data are transmitted to ground control equipment (5) arranged on the ground through a signal transmission cable (4) for data processing.
2. The direct-measurement borehole internal pressure water test method according to claim 1, wherein the ground control equipment (5) comprises functions of displaying, touching operation keys, data storage and uploading, automatically calculates the rock mass permeability and permeability coefficient of a test section, draws a P-Q curve and judges the type of the curve, and automatically generates a pressure test result report and uploads the pressure test result report in real time.
3. The direct-measurement type in-borehole pressurized water test method according to claim 2, wherein a pressure sensor is installed at the midpoint of a test section in the borehole, the elevation of the water level in the borehole is converted by the pressure value and the elevation of the atmospheric pressure value of a measuring point before the test, after water injection into the hole is started, the pressure value of each stage in the test section is measured according to the standard requirement, and the measurement data are collected by ground control equipment.
4. The direct-measurement borehole internal pressure water test method according to claim 3, wherein the ground control device (5) measures test pressure and permeation flow Q according to pressure specified by specifications, calculates rock mass permeability and permeation coefficient of a test section, draws a P-Q curve and judges curve type, generates a pressure test result report and uploads the pressure test result report in real time.
5. The direct measurement borehole internal pressure water test method according to claim 1, wherein the pressure sensor (3) is installed in the middle of the pressure water test probe (6) and is located at a position 2.5m below the middle point of the upper plug.
6. A direct-measurement type borehole internal pressure water test device, which adopts the direct-measurement type borehole internal pressure water test method as set forth in any one of claims 1 to 5, and is characterized by comprising the following components: The ground control equipment is used for controlling the test process, signal transmission and data analysis of the in-hole pressurized water test and comprises display, touch operation keys, data storage and uploading functions, automatically calculating the rock mass permeability and permeability coefficient of a test section, drawing a P-Q curve, judging the type of the curve, automatically generating a pressure test result report and uploading the pressure test result report to related professionals in real time; the flow sensor is arranged at the lower part of the upper plug and is used for measuring the flow of the permeated water under a certain pressure entering the test section and collecting measurement data through ground control equipment; The pressure sensor is arranged at the midpoint of the test section in the drill hole, measures the atmospheric pressure value at the midpoint of the test section in the drill hole when the pressurized water test probe is lowered to the measuring position, thereby converting the elevation of the underground water level in the hole, measures the pressure value of each stage in the test section according to the standard requirement after water injection into the hole is started, and collects measurement data through the ground control equipment.

Description

Direct-measurement type borehole internal pressure water test method and device Technical Field The invention belongs to the field of hydropower engineering, in particular to a direct-measurement borehole internal pressure water test method and device, which are mainly applied to field pressure water tests and data analysis in rope core drilling in hydropower engineering, hydraulic engineering and other engineering exploration (inspection). Background The pressurized water test is one of the conventional in-situ test methods indispensable in the hydropower engineering investigation, is used for measuring the water permeability of the rock mass, and provides basic data for evaluating the permeability characteristics of the rock mass and designing seepage control measures. The in-situ pressurized water test device in the drill hole consists of a water stop plug, a water supply system and a measuring system. The traditional pressurized water test is to manually observe and record test pressure and flow through a mechanical pressure meter and a flowmeter arranged on the ground surface, and then manually calculate, analyze and measure data to form test results, so that the pressurized water test has the advantages of long working time, low efficiency, high cost and larger error. Disclosure of Invention The invention aims to provide a direct-measurement type in-borehole pressurized water test method and device, wherein a pressure sensor is arranged at the middle point of a test section in a borehole, a flow sensor is arranged at the lower part of an upper plug, the test pressure of the test section and the seepage flow under the pressure are directly measured, the accuracy, the reliability and the working efficiency of test results are effectively improved, and therefore the problems in the prior art are solved. In order to achieve the purpose, the technical scheme includes that the method for testing the pressurized water in the drill hole by direct measurement is characterized in that a pressure sensor is arranged at the middle point of a test section in the drill hole, a flow sensor is arranged at the lower part of an upper plug, test pressure of the test section and seepage flow under the pressure are directly measured, and test data are transmitted to ground control equipment arranged on the ground through a signal transmission cable to be subjected to data processing. Further, the ground control equipment comprises display, touch operation keys, data storage and uploading functions, automatically calculates the rock mass permeability and permeability coefficient of the test section, draws a P-Q curve and judges the type of the curve, automatically generates a pressure test result report and uploads the pressure test result report in real time. Further, a pressure sensor is arranged at the middle point of a test section in the drill hole, the elevation of the water level in the drill hole is converted through the pressure value and the elevation of the atmospheric pressure value of the measuring point before the test, after water injection into the hole is started, the pressure value of each stage in the test section is measured according to the standard requirement, and measurement data are acquired through ground control equipment. Further, the ground control equipment measures test pressure and permeation flow Q according to pressure specified by specifications, calculates rock mass permeability and permeation coefficient of a test section, draws a P-Q curve and judges the type of the curve, generates a pressure test result report and uploads the pressure test result report in real time. Further, the pressure sensor is arranged in the middle of the pressurized water test probe and is positioned at a position 2.5m below the middle point of the upper plug. The direct-measurement type borehole internal pressure water test device adopts the direct-measurement type borehole internal pressure water test method, and comprises the following components: The ground control equipment is used for controlling the test process, signal transmission and data analysis of the in-hole pressurized water test and comprises display, touch operation keys, data storage and uploading functions, automatically calculating the rock mass permeability and permeability coefficient of a test section, drawing a P-Q curve, judging the type of the curve, automatically generating a pressure test result report and uploading the pressure test result report to related professionals in real time; the flow sensor is arranged at the lower part of the upper plug and is used for measuring the flow of the permeated water under a certain pressure entering the test section and collecting measurement data through ground control equipment; The pressure sensor is arranged at the midpoint of the test section in the drill hole, measures the atmospheric pressure value at the midpoint of the test section in the drill hole when the pressurized water test prob