Device and method for detecting depth of foundation pit dewatering

Abstract

The invention discloses a device and method for detecting the depth of foundation pit dewatering. The detecting device is composed of a hole-forming pipe, a detecting pipe and a ruler rod. The top of the hole-forming pipe is sleeved with a smashing-preventing plate embedded with a gradienter, water leaking holes are distributed in the side wall of the hole-forming pipe, and the bottom end of the hole-forming pipe is a closed end and is provided with a solid conical head. The detecting pipe is arranged inside the hole-forming pipe, the bottom end of the detecting pipe is closed, small water inlet holes are distributed in the side wall of the detecting pipe, and the detecting pipe is wrapped by a sand separating net. The ruler rod is arranged inside the detecting pipe and is made of light materials, the upper portion of the ruler rod is provided with a scale ruler, and the bottom end of the ruler rod is provided with a light hollow ball. The top portion of the ruler rod is sleeved with a vertical cover. When the device is used for detecting the water level, water leaks into the hole-forming pipe, is deposited in a sand depositing area and filtered through the sand separating net and then enters the detecting pipe, the ruler rod inside the detecting pipe rises under the action of buoyancy, the water level height on the scale ruler of the ruler rod is read, and then water level detecting is finished. The device is low in cost, simple in structure, convenient to operate, free of the effect of sediment during detecting, accurate and reliable in detecting result and wide in application range.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a detection device for foundation pit precipitation depth. Background technique [0002] At present, if the groundwater level in the construction project area is high, it is necessary to take measures to reduce the groundwater level during the construction phase of the underground structure to meet the construction environment requirements of the underground structure construction phase. In the prior art, because there is a certain distance between adjacent dewatering wells, the groundwater level elevation in the middle of two adjacent dewatering wells adopts theoretically calculated values. The "Code for Quality Acceptance of Underground Waterproof Engineering" stipulates that the designed dewatering water level in the foundation pit should be It is 0.5m below the bottom of the foundation pit. Therefore, it is necessary to strictly detect and control the groundwater level. T...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a foundation pit dewatering depth detection device and detection method, which solves the problem that existing devices for actual measurement of groundwater level have complex structures, complex application of technical principles such as ultrasonic waves, high application costs, and low technical level of operators. Strict requirements, large equipment and small scope of application; at the same time, it solves the problem that the existing water level detection equipment is easily affected by sediment during detection, and the detection results are not ideal

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