Prefabricated pipe pile welding seam quality inspection device and its inspection method

Abstract

The invention discloses a prefabricated pipe pile welding seam quality detection device and a detection method thereof. The detection device is equipped with a rubber holster on the outside of each welding seam, and according to the welding seams at different depth positions, thin water injection hoses of corresponding lengths are configured, and the upper ends of each thin water injection hose are connected to the The pressurizing device with the hydraulic gauge on the ground is connected, and the lower ends are respectively wrapped in the rubber sheaths socketed outside the welding seams at different depths. Therefore, pressurize and inject water into the rubber holster at the location of the welding seam through the corresponding water injection thin hose, and then read the reading of the hydraulic gauge after applying a certain pressure, and the quality of the welding seam at the location can be judged according to the change of the reading of the hydraulic gauge . It can be seen that the present invention can detect multiple welding seams of different depths separately, avoiding mutual interference between the welding seams; no hole cleaning operation is required, and the detection efficiency is high and the cost is low.

Description

technical field [0001] The invention relates to a prefabricated pipe pile welding seam quality detection device and a detection method thereof. Background technique [0002] Prefabricated tubular piles are widely used in civil engineering because of the advantages of reliable pile quality, convenient transportation, fast construction speed, and low cost per unit bearing capacity. Restricted by conditions such as hoisting, transportation and pile sinking machinery, the length of single-section pipe piles is generally not large, and multi-section pipe piles are often welded together for use in projects. Workers' welding skills and on-site operating conditions will affect the welding quality. Pile sinking by hammering has a great impact on the pile, especially when passing through uneven soil layers, which may cause cracks at the welding seam; The effect can also lead to impaired quality of the weld or even desoldering. The quality defects of the welded seam will reduce the b...

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Problems solved by technology

[0003] At present, the commonly used method for detecting the quality of welded joints of pipe piles is the low-strain reflected wave method, which judges the quality of welded joints by testing the low-strain reflected signals at the position of the welded joint. The area is obviously smaller than the cross-sectional area at the normal position of the pile body, so that there will be reflection signals at this position even when the welding quality is intact, and the amplitude of the reflection signals is also affected by the properties of the soil around the pile. The magnitude of the value determines the severity of the quality problem of the welded seam; secondly, in general, the number of sections of the pipe pile will exceed two sections, that is, there are multiple welded seams with different depths, and the welded seam at the deep position will be affected by the upper welded seam. The reflection signal is difficult to distinguish due to interference or its own depth is too large, and its quality cannot be evaluated

Recently, the in-hole camera method has been used in engineering to judge the quality of pipe piles. The camera is lowered from the top of the pile along the cavity of the pipe pile. During this process, the quality of the inner wall of the pipe pile is observed in real time through a computer placed on the ground surface. The method is more intuitive than the low-strain reflection wave method, but there are still some problems: first, it is difficult to clean the hole. For the case of rich groundwater level, the water accumulation in the hole is too fast to be detected; secondly, the pipe pile welding operation is carried out in the gap reserved outside the end plate, and the inside of the pipe pile connection is not welded, which itself is There is a gap, and the camera in the hole captures the inner gap, which cannot be used to judge the quality of the outer weld

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