A Dissolved Air Balance Monitoring System and Method for Preparation of Air-Containing Soil Samples
A monitoring system and soil sample technology, which are applied in the preparation of test samples, test water, material inspection products, etc., can solve the problems of lack of monitoring methods, errors, and lack of monitoring methods.
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Embodiment 1
[0047] Such as Figure 1 ~ Figure 3 As shown, a dissolved air balance monitoring system for the preparation of air-bearing soil samples includes a monitoring kettle 1, a triaxial instrument 2, a high-pressure dissolved gas saturation instrument 3, and a volume pressure controller 106. The bottom of the monitoring kettle 1 is the bottom plate of the kettle, There is a monitoring cavity 15 in the bottom plate of the kettle, one end of the monitoring cavity 15 is connected with a pipe C171, and the other end of the monitoring cavity 15 is connected with a pipe D141. The top of the monitoring kettle 1 is a top cover, the top cover of the monitoring kettle 1 is sealed with a pH sensor 102 , the bottom of the pH sensor 102 has a pH probe 103 , and the pH probe 103 at the bottom of the pH sensor 102 is placed in the monitoring cavity 15 . The top cover of the monitoring kettle 1 is sealed with a vacuum pressure gauge 105 and a temperature sensor 101 , and the detection ends of the va...
Embodiment 2
[0084] Monitor CO 2 The time for a gas to dissolve, saturate, and desolvate in an aqueous solution
[0085]Refer to the method disclosed in the Chinese patent (Patent No. ZL201410027361.5) titled "High-pressure dissolved gas saturation test device and its application in the artificial preparation of gas-containing samples" to prepare CO 2 Saturated aqueous solution, the whole process of the test is controlled at a constant temperature of 25°C.
[0086] A: CO in aqueous solution 2 Determination of dissolution saturation time
[0087] (1) Open the eighth valve 33, the ninth valve 34, and the tenth valve 36, so that the degassed water slowly enters the lifting kettle 30 from the ninth valve 34, and when the water surface rises to 3 / 4 of the height of the lifting kettle 30, close The ninth valve 34 stops water intake.
[0088] (2) Adjust the height of the lifting kettle 30 to be 50cm higher than the height of the fixed kettle 35, connect the pipe C171 with the pipe B341 corres...
Embodiment 3
[0095] 1. Determination of the complete displacement time of degassed water in saturated soil during sample preparation of aerobic soil
[0096] In the present embodiment, take the geotechnical triaxial test as an example, with seabed fine sand (specific gravity Gs is 2.68, maximum dry density 1.55g / cm 3 , the minimum dry density is 1.27g / cm 3 ) as the object, the remolded soil was prepared according to the "Standards for Soil Engineering Test Methods" (GB / T50123-2019), the test process was controlled at a constant temperature of 25 °C, and the triaxial air-bearing sand samples were prepared. The specific test process is carried out according to the following steps:
[0097] (1) Prepare the soil sample 21 according to the method for conventional geotechnical triaxial test sample preparation, and complete the installation of the soil sample 21 in the triaxial pressure chamber of the geotechnical triaxial instrument 2, and carry out back pressure saturation. After the soil samp...
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