Handheld underwater grouting pile top-surface elevation control early-warning device and method

Abstract

The invention discloses a handheld underwater grouting pile top-surface elevation control early-warning device and method. The handheld underwater grouting pile top-surface elevation control early-warning device comprises a handheld alarm, a waterproof lead and an underwater closed probe. The handheld alarm is provided with a main controller, a power supply, a signal processing circuit and an alarm circuit inside, wherein the power supply, the signal processing circuit and the alarm circuit are connected with the main controller respectively. A motor is arranged in the underwater closed probe. When concrete is grouted, coarse aggregate rises to the designed elevation, the motor inside the underwater closed probe rotates in a resistant manner, and shoot-up current signals generated by the resistant rotation are connected to the handheld alarm through the waterproof lead to generate alarm signals. The handheld underwater grouting pile top-surface elevation control has the advantages of simple structure and convenience in operation and can be accepted by on-site constructors. Through test on the construction site, pile top elevation of the underwater grouting pile can be accurately controlled, within 5 cm, and control accuracy is remarkably improved as compared with that of conventional pile detection methods.

Description

technical field [0001] The invention relates to the related technical field of construction engineering equipment, in particular to a hand-held early warning device and method for controlling the top elevation of underwater grouting piles. Background technique [0002] Concrete is the most common construction material in civil engineering construction. It has a wide range of uses and plays an important role in the construction of buildings and the like. In the construction of buildings, the construction of the lower foundation is the most important, which directly determines the safety and stability of the upper structure. Most of the lower concrete foundations are pile foundation projects, and all of them are concealed pile foundations, that is, the design elevation of the pile top is below the ground and the borehole is filled with mud. Human eyes cannot directly judge the elevation of the top surface of the foundation pile. [0003] The most commonly used detection metho...

AI Technical Summary

Problems solved by technology

[0004] 1) The volume is too bulky

[0005] 2) The detection work needs to be carried out at regular intervals, which greatly delays the construction progress

[0006] 3) Relying entirely on the experience of construction personnel, it is very easy to cause serious over-irrigation

[0007] 4) Overfilling causes waste of concrete, and a lot of manpower and financial resources are wasted in removing pile heads

[0008] 5) Concrete waste is very serious to environmental pollution

This device has the following disadvantages: 1) The proportion of mud in each area is different, and the proportion of different grades of concrete also has a large difference

Therefore, it will inevitably cause false alarms of the device, which will affect the quality of the entire pile body and may cause economic losses.

2) During the pouring process, the upwelling surface of the concrete is irregular, and the upwelling surface when it is about to reach the design elevation will be higher than the elevation surface, which will also cause false alarms

Due to the complex environment of the construction site, this device will undoubtedly increase the workload of the on-site staff, and the grab bucket of the device uses a large number of bolt structures, and the sand particles in the mud will block the bolts after entering the bolts, which will cause the device to fail to work

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