A device and method for monitoring the groundwater level of a foundation pit using a laser rangefinder
A technology of laser distance meter and groundwater level, which is used in measuring devices, lubrication indicating devices, instruments, etc., can solve the problems of difficult to guarantee accuracy and low accuracy, and achieve the effect of simple and fast monitoring operation, high accuracy and high efficiency.
Active Publication Date: 2021-01-01
SHAOXING UNIVERSITY +2
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Problems solved by technology
[0003] There are two main monitoring methods for the groundwater level of existing foundation pit engineering: one is to bury the groundwater level observation well, directly extend into the water level observation well with a dry steel ruler, and record the distance between the wet trace and the wellhead to calculate the height of the groundwater level; However, it is only applicable to the case of high groundwater level, and the accuracy is not easy to guarantee; the other is to bury the groundwater level observation well, use an electric water level meter to measure, and finally read the water depth directly from the cable scale. also lower
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[0032] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0033] Such as Figure 1 to Figure 6 As shown, a device for monitoring the groundwater level of a foundation pit using a laser range finder includes a well pipe 2 installed in a hole 11 under the ground 1, and groundwater 3 is poured into the well pipe 2, and the well pipe 2 is located in the There is a buoy 4 floating on the water surface of the groundwater 3, the upper surface of the buoy 4 is provided with a reflective sheet, the upper end of the well pipe 2 is blocked by a protective cover 9, and the protective cover 9 can prevent rainwater from entering the well pipe 2 when not monitoring .
[0034] The outer wall of the upper end of the well pipe 2 is symmetrically provided with a plane part 23, and the plane part 23 is formed by cutting a piece of the circular outer wall of the well pipe 2 from top to bottom. Screw holes 24, the top of the m...
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The invention discloses a device for monitoring the underground water level of a foundation pit through a laser range finder. The device comprises a well casing. Underground water floods into the wellcasing, a buoy is floated on the water surface in the well casing, and the upper end of the well casing is plugged by a protecting cover. Plane parts are arranged on the outer wall of the upper end of the well casing, metal semi-ring mounting screw holes are formed in the plane parts, concave strips are arranged on the position, above the metal semi-ring mounting screw holes, of the plane parts,and a metal semi-ring is mounted on the plane parts through fasteners and can rotate along the fasteners. Connecting blocks are arranged at the ends of the metal semi-ring and attached to the plane parts, connecting block penetrating holes are formed in the connecting holes, and semicircular bulges are arranged on the inner side walls of the connecting blocks. When the metal semi-ring rotates tillthe semicircular bulges are clamped into the concave strips correspondingly, the metal semi-ring is in a vertical state. A sunken part is arranged at the upper end of the metal semicircular ring, a laser range finder mounting screw hole is formed in the middle of the sunken part, and the laser range finder is connected to the sunken part. The device for monitoring the underground water level of the foundation pit through the laser range finder is simple in structure, convenient to mount, convenient to operate, capable of meeting the precision requirement, low in cost and easy to apply and popularize.
Description
technical field [0001] The invention relates to the field of civil engineering monitoring, in particular to a device and method for monitoring the groundwater level of a foundation pit by using a laser range finder. Background technique [0002] In order to provide good working conditions and stable conditions for the foundation pit during foundation pit excavation, it is necessary to take corresponding measures to reduce the groundwater level to ensure construction safety and project quality. Through monitoring the groundwater level, it can be judged whether the foundation pit precipitation meets the design requirements. Whether it meets the conditions for foundation pit excavation, or whether it causes a large drop in the surrounding groundwater level to judge the effect of the water-stop curtain, so it is particularly important to grasp the dynamics of the groundwater level. [0003] There are two main monitoring methods for the groundwater level of existing foundation pi...
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IPC IPC(8): G01F23/292
CPCG01F23/292
Inventor 夏才初张秋辉黄建东谷丰杜时贵
Owner SHAOXING UNIVERSITY