An auxiliary detection device for drilling water injection test and its use method

Abstract

The invention relates to an auxiliary detection device for drilling water injection testing and a utilization method thereof, and discloses a device capable of moving a water head to a hole bottom andcooperating with a water line to more accurately detect and measure the water inlet amount of water injection testing, and the utilization method of the device. Accuracy for reading of seepage quantity of water injection testing is improved. The auxiliary detection device is characterized in that an electromagnetic valve is arranged at one end of a connecting pipe; a flowmeter is arranged in themiddle of the connecting pipe; one end of a hose communicates with the other end of the connecting pipe; scales are arranged on the outer surface of the hose; an annular counterweight is arranged at the other end of the hose; a centring device is arranged on the hose; a fixing plate is arranged on the electromagnetic valve; a storage battery is arranged on the fixing plate; a switch is arranged onthe fixing plate; the switch, the storage battery and the electromagnetic valve form a loop through a power line; a transformer is arranged on the fixing plate and is connected with the storage battery through the power line; a charging port is arranged on the fixing plate and is connected with the transformer through the power line; a power indicator light is arranged on the storage battery; andthree fixing sleeves are arranged on the hose.

Description

technical field [0001] The invention relates to an auxiliary detection device for a borehole water injection test and a use method thereof, and relates to an auxiliary detection device for a borehole water injection test in engineering construction and a use method thereof, belonging to the field of hydrogeological exploration. In particular, it relates to a device for transferring the water head to the bottom of the hole and matching with the water level line to more accurately check and measure the water inflow in the water injection test and its use method. Background technique [0002] At present, in the process of water conservancy, electric power, railway, housing construction and other engineering surveys and foundation pit treatment, the hydrogeological exploration often involves drilling water injection tests. Injecting water into the test section, maintaining a fixed water head height, measuring the amount of water injected into the rock-soil layer, or measuring th...

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Problems solved by technology

[0002] At present, in the process of water conservancy, electric power, railway, housing construction and other engineering surveys and foundation pit treatment, the hydrogeological exploration often involves drilling water injection tests. Injecting water into the test section, maintaining a fixed water head height, measuring the amount of water injected into the rock-soil layer, or measuring the change rate of the water head height and the test time to determine the in-situ test method of the permeability coefficient of the rock-soil layer, the main problems are as follows: First of all, the current field conditions of drilling water injection tests are generally relatively simple, so measuring cylinders or cups are mainly used for measuring, and the accuracy of reading data is low. , Marking and other relatively rough means, the accuracy is low, and the experience of the test personnel is tested. Third, the water injection at the construction site is generally injected directly from the bore hole. Due to the different test water heads, there are often differences in the water head. Hysteresis makes the data of water level detection asynchronous, and will cause the wall of the test hole to be scoured and affect the test results. Finally, in the current measurement process of the on-site water injection test, some soft water pipes are used to inject water, but due to the inclination of the hole, etc. , there are situations such as hose bending and hose touching the wall, the above problems are the main reasons for the distortion of the measured data of the water injection experiment, and cannot be directly used

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