Apparatus and method for detecting grouting fullness of reinforcement semi-grouted sleeve by endoscopic water injection method

Abstract

The invention discloses an apparatus and a method for detecting grouting fullness of a reinforcement semi-grouted sleeve by an endoscopic water injection method. The apparatus comprises a guiding frame, an industrial endoscope and an injection apparatus; the guiding frame comprises a guiding ruler, two side surfaces of the guide ruler are respectively provided with a plurality of guide rings, andone side surface of an entry end of the guide ruler is provided with a cornering auxiliary part; the injection apparatus consists of an injection hose and an injector which are connected, and the injection hose is arranged in the guide rings on one side; the industrial endoscope comprises a detector pipeline, two ends of the detector pipeline are respectively connected with an endoscope main machine and an endoscope detector, and the detector pipeline is arranged in the guide rings on the other side; and by virtue of the cooperation of the industrial endoscope, the guiding frame and the injection apparatus, the endoscopic water injection is performed for grouting defects inside the sleeve, so that the grouting fullness can be effectively and accurately detected. The grouting fullness detection apparatus and method provided by the invention have the advantages of reasonable structure, no need of embedding a sensor, reusability, convenience in operation and low comprehensive applicationcost.

Description

technical field [0001] The invention relates to the field of prefabricated buildings, in particular to a device and a method for detecting the grouting fullness of a steel half-grouting sleeve by an endoscopic water injection method. Background technique [0002] As a structural form in line with industrial production methods, prefabricated concrete structures have the advantages of fast construction speed, low labor intensity, less noise pollution and wet work, and easy control of product quality. It has become the mainstream development direction of the construction industry at home and abroad. In February 2016, "Several Opinions of the Central Committee of the Communist Party of China and the State Council on Further Strengthening the Management of Urban Planning and Construction" proposed to strive to make the proportion of prefabricated buildings account for 30% of new buildings in about ten years. Raised to unprecedented heights. [0003] In prefabricated building str...

AI Technical Summary

Problems solved by technology

However, this method has the following three disadvantages: (1) It can only detect qualitatively, and cannot quantitatively analyze the fullness of the grouting material, which makes it difficult to judge the results in the later stage; (2) The damping vibration sensor must be installed in place before the grouting construction , once the sensor is embedded in the sleeve, it cannot be reused. If all the sensors are arranged on all the sleeves in the project, and the random sampling test is carried out later, the detection cost will be too high, which is unacceptable to all parties. If a limited number of randomly arranged before the grouting construction Sensors, the construction party knows the detection points in advance according to the location of the sensors, and must carefully construct the known detection points, eventually losing the meaning of random sampling, and still burying potential safety hazards

(3) During the internal painting construction, the sensor that protrudes from the wall must be cut off to ensure the smoothness of the wall, which is time-consuming and laborious

The above-mentioned device and method seem to be simple and feasible, but actually have the following disadvantages and will lead to misjudgment of the detection results: (1) For the grouting sleeve itself, four holes are added above the grout hole for inserting four pipes , too many openings may lead to a decrease in the mechanical properties of the grouting sleeve, which will bring major safety hazards

(2) For the production and manufacture of prefabricated components, there are too many additional pipes on the sleeve, and in addition to the original grouting pipeline and grouting pipeline, six pipelines will be arranged in the sleeve position of the prefabricated component at the same time. Double-row sleeves will double the number of pipes, which will undoubtedly bring great inconvenience to concrete pouring and vibration, thus affecting production efficiency and component quality

(3) On-site detection equipment is complex, and on-site assembly and debugging of input liquid volume measuring instruments, output liquid volume measuring instruments, and water supply devices are cumbersome and inconvenient to carry

(4) The quantitative detection method is not combined with the actual engineering, and there may be large errors in the detection results, which may easily lead to misjudgment; the above method judges the fullness of the grouting by the volume of the liquid retained in the grouting sleeve. The grout hole fills the cavity area in the sleeve and the cavity area in the slurry outlet pipe. Due to the high viscosity of the grouting material, after the grouting is completed, the grout outlet is tightly sealed, even if the slurry in the sleeve is empty, the horizontal There will still be grouting material in the grouting pipe in the same direction, but the final shape of the grouting material in the grouting pipe cannot be determined, that is, the volume of the cavity area in the grouting pipe is unknown. The liquid volume in the grout is used to measure the degree of incompleteness of the grout, and the volume measurement error caused by the residual grout in the grout pipeline is not considered, which can easily lead to misjudgment

(5) When replenishing the grout, it is not to choose to pump out the test liquid before refilling the grout, but to replace the test liquid through the repair material; when the above repair device and method are used on site, the density of the repair material output pipe that can be stably discharged from the repair material cannot be quickly Accurate detection and blind continuous grouting will easily cause waste of grouting materials and increase costs

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