A new simple semi-automatic cast-in-place pile hole depth measuring device

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By designing a semi-automatic pile hole depth measurement device, and utilizing a support frame and electronic control system, the problems of inaccurate positioning and safety risks associated with traditional manual measurement were solved, thereby improving the accuracy and efficiency of measurement.

CN224455660UActive Publication Date: 2026-07-03SHANGHAI BAOYE GRP CORP

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SHANGHAI BAOYE GRP CORP
Filing Date: 2025-07-03
Publication Date: 2026-07-03

AI Technical Summary

Technical Problem

Traditional methods for measuring the depth of cast-in-place pile holes rely on manual operation, which is easily affected by the resistance of the mud in the hole and the unevenness of the hole wall, resulting in inaccurate positioning and large reading errors. In addition, manual setting out is prone to rubbing against the steel cage, the lowering and retrieval speed is slow, and there is a risk of workers slipping.

Method used

A novel, simple, semi-automatic device for measuring the depth of cast-in-place pile holes was designed. It adopts a structure consisting of a bracket, a fixed bearing ring, a central rotating shaft, a rotating wheel, and a winding reel. Combined with electronic control and display, the device automatically records and displays the length of the measuring rope by sending a signal when the pressure sensor touches the bottom. With the help of an adjustable telescopic guide rod and fixing components, the device ensures accurate positioning of the measuring hammer and avoids tilting or displacement of the device.

Benefits of technology

It improves the accuracy and efficiency of hole depth measurement, reduces the safety risks for operators, and ensures the accuracy of measurement data and the convenience of operation.

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Abstract

This utility model relates to the field of grouting measurement technology and discloses a novel, simple, semi-automatic grouting pile hole depth measuring device. It includes a support frame, with two fixed bearing rings internally connected to the support frame. A central rotating shaft is rotatably connected internally to each fixed bearing ring. Two rotating wheels are fixedly connected externally to the central rotating shaft. Multiple fixed rods are fixedly connected to adjacent sides of each rotating wheel. A telescopic guide rod is fixedly connected to the top of the support frame, and an extension fixing assembly is fixedly connected to the bottom of the support frame. The fixing assembly includes multiple fixing plates, and gears are rotatably connected internally to each fixing plate. In this utility model, the telescopic guide rod, which is flexibly adjustable at the top of the support frame, accurately positions the measuring hammer directly above the center of the pile hole. Combined with a reel structure, it achieves semi-automatic manual deployment and retraction of the measuring rope and hammer, thereby greatly improving the efficiency of hole depth measurement while ensuring operator safety.

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