Device and method for judging whether concrete pouring height of cast-in-situ bored pile is reached or not

Abstract

The invention discloses a device and a method for judging whether concrete pouring height of a cast-in-situ bored pile is reached or not. The device comprises a main controller and a plurality of temperature sensors at different heights, which are arranged in formed holes at equal distance, and further comprises a moving mechanism which is arranged along the height of the formed holes, wherein allof the temperature sensors are in signal connection with the main controller; the lower end of the movable mechanism is equipped with a pressure sensor; and the pressure sensor is also in signal connection with the main controller. The key point of the method is characterized in that the main controller calculates height difference Hn between n groups of temperature sensors, temperatures of whichare increased to T0, and the other temperature sensor above which heat up is started, and a mean value is fitted as a thickness of a laitance and mud layer of a concrete layer surface. The device andthe method are precise in judged results, and are quick and convenient in process.

Description

technical field [0001] The invention relates to the field of concrete pouring in civil engineering, specifically a device and method for judging whether the height of concrete pouring of bored piles is in place, and more specifically, when constructing full-sleeved bored piles, use It is a device and method for judging whether the actual pouring height reaches the set height. Background technique [0002] When constructing bored piles in soft soil, mud wall protection is required, but the resulting large amount of mud is inconvenient to discharge and treat later, and is easy to pollute the environment. A full casing is driven from the ground to the height of the bearing layer at the bottom of the pile. The full casing is used to protect the wall, and the soil in the casing is excavated by an excavator. Pour concrete up to the set level. The above-mentioned full casing construction technology replaces the mud protection wall with the full casing casing wall, so the generate...

AI Technical Summary

Problems solved by technology

However, it is found in actual construction that as the depth of the laitance layer increases and the viscosity also increases, the weight hammer of the prior art may not be able to pass through the laitance layer smoothly, but is suspended by the laitance jack. In this way, the existing The technical heavy hammer can't even reach the concrete layer, so it is impossible to judge the actual concrete pouring height; moreover, even if the heavy hammer reaches the concrete layer smoothly, it only depends on the experience of the workers, the slack of the measuring rope and the specific feel of the lowering. Too much noise, very imprecise

[0005] Of course, it is also possible to divide the total amount of concrete poured by the cross-sectional area of ​​the drilled hole to roughly obtain a concrete pouring height, but the accuracy of the above-mentioned conversion method is too low, and due to the existence of reaming holes, the inconsistency of the hole diameter makes it difficult to estimate. Guide the actual construction

Therefore, the existing technology generally adopts a method of overfilling a certain height such as 1 meter for construction. For example, if the elevation of the poured concrete is set to 9 meters, it needs to be poured to 10 meters to ensure that the concrete is fully poured, thereby ensuring the quality of the pile. Overfilling will inevitably lead to waste of concrete materials, resulting in increased costs, and does not meet the needs of energy conservation and environmental protection

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