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Trial Pit Single-Ring Water Injection Test Device

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Trial Pit Single-Ring Water Injection Test Device

3.1 Applicable Conditions and Test Equipment

3.1.1 The single-ring infiltration test in trial pits is suitable for non-cohesive soil layers such as sand, sandy gravel, and gravelly soils located above the groundwater table.

3.1.2 Single-ring water injection test equipment and its applications are shown in the table. 3.1.2。

Table 3.1.2 Overview of Single-Loop Water Injection Test Equipment

Name Specification

Iron Ring, Tall 20cm , Straight diameter 35.75cm

Water tank capacity 1m

3 . 1

The measuring cylinder has a uniform cross-section, with an area no larger than 5000cm

3.2 Field Testing

3.2.1 The trial pit excavation shall meet the following requirements:

1 1. At the selected test location, excavate a circular or square test pit to the predetermined depth;

2 , Dig another deep one on one side at the bottom of the test pit 15–20 cm Fill the test pit with water, ensuring the pit bottom is leveled and that the structure of the test soil layer remains undisturbed.

3.2.2 The installation of the iron ring shall comply with the following requirements:

1 1. Place an iron ring inside the water-filled test pit, ensuring it makes tight contact with the pit; then seal the exterior thoroughly with clay to prevent any leaks around the sides.

2 , Lay at the bottom of the loop 2~3 cm Thick particle size 5~10mm The fine gravel serves as a buffer layer.

3、2.3 Pour water into the ring until the water depth inside reaches 10cm At that time, start recording the measured time and the amount of water added, according to the appendix. A Table A.0.1-1 Keep a record. During the experiment, the water depth should be maintained. 10 cm, The fluctuation range should not exceed 0.5 cm 。

1 The accuracy of water volume measurement should reach 0.1L。

2 Start every other 5min Measure once, continuous measurement 5 Next time ; From now on, every 20min Measure once and continue measuring at least continuously. 6 Next.

3 When continuous 2 The difference between consecutive measured injection flows should not exceed the value of the most recent flow. 10% At that point, the test can be concluded. Take the last injected flow rate as the calculated value.

Company Profile

Hebei Yinfeng Experimental Instrument Co., Ltd. is a high-tech enterprise dedicated to the research and development, production, and sales of experimental instruments. The company is headquartered in Hebei Province, relying on the strong industrial foundation and technological innovation resources in the Beijing Tianjin Hebei region. It is committed to providing high-precision and high reliability testing equipment and solutions for material testing, engineering quality control, scientific research experiments and other fields.

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