Monitoring device for overfilling of cast-in-situ piles and its application method

Abstract

The invention relates to a cast-in-place pile overfilling monitoring device. The device comprises an equipment bracket, a monitoring sensor, an alarm assembly and a center control host; the monitoring sensor is used for achieving conducting real-time monitoring on a concrete spouting height; the alarm assembly is fixedly arranged on the equipment bracket, electrically connected to the monitoring sensor and used for feeding back monitoring results of the monitoring sensor; the monitoring sensor is connected to the equipment bracket with the help of a connecting assembly arranged on the equipment bracket; the center control host is fixedly arranged on the equipment bracket, in signal connection to the monitoring sensor and the alarm assembly and used for achieving signal transfer between the monitoring sensor and the alarm assembly. Through the cast-in-place pile overfilling monitoring device, the water content of different liquids can be detected through the sensor, accordingly whether concrete reaches a set scale height or not is judged, and after the concrete reaches the set scale height, an alarm is given timely. In this way, not only is the valid spouting height of a cast-in-place pile ensured, but also the overfilling amount is reduced to the greatest extent, and the subsequent chiseling and removing difficulty is lowered.

Description

technical field [0001] The invention relates to a pouring control device, in particular to a pouring pile superfill monitoring device used in the concrete pouring process and a method for using the same, belonging to the field of construction engineering. Background technique [0002] Cast-in-situ piles are formed by directly opening a circular hole with a cross-section on the designed pile position. After the hole is formed, a steel cage is added to the hole and concrete is poured. According to the hole-forming process, the cast-in-place pile can be divided into dry operation Cast-in-place piles, cast-in-place piles with mud retaining walls and artificially dug holes, etc., due to the advantages of no vibration, no soil extrusion, low noise during construction, and suitable for use in densely built urban areas, cast-in-place piles It is widely used in construction. [0003] Although concrete pouring piles are used more and more in construction engineering, the control of t...

AI Technical Summary

Problems solved by technology

[0003] Although concrete pouring piles are used more and more in construction engineering, the control of the top elevation of concrete pouring piles has always been one of the difficulties in the construction of concrete pouring piles. , For example, if the amount of admixture is too high or the water consumption exceeds the standard, the concrete slump will be too large or even segregated, and laitance will appear. The strength of cast-in-place piles cannot meet the standard requirements of cast-in-place piles. Therefore, in order to avoid the influence of laitance layer, when controlling the top elevation of cast-in-place piles, it is often necessary to overfill the specified height on the set height of cast-in-place piles. Generally, cast-in-place piles need to exceed the height It is more than 500mm, and the laitance part is cut off after the concrete is solidified. Therefore, if the top elevation is set too low, the piling body finally formed by the laitance layer cannot be avoided. If the top elevation is set too high, then Cause waste of concrete and difficulties in subsequent construction (cutting away the laitance layer and the concrete exceeding the design height of the cast-in-place pile)

[0004] At present, in the process of superfill height control, the difficult problem is how to accurately identify the interface between concrete and laitance, so as to determine the actual height of concrete. The traditional construction method is to manually place heavy objects on the The design elevation position of the cast-in-situ pile or the penetrating test of the bamboo pole rely on the staff's hand feeling or experience to judge whether the heavy object has a pulling force on the human hand or whether there is concrete pushing the bamboo pole to identify the interface between the concrete and the laitance. The requirements for personnel are high, and it is impossible to ensure that the heavy objects or the bottom of the bamboo pole are accurately located at the design elevation of the cast-in-place pile, so the recognition error of the interface is relatively large. At the same time, due to the complex environment of the construction site, these methods are less affected by the site operation environment. large, which further reduces the recognition accuracy

[0005] Chinese patent CN201310141689.5 discloses an underwater cast-in-situ pile concrete overfill detector and its use method, but the device in this patent is only suitable for underwater cast-in-place piles, not completely suitable for ordinary cast-in-place piles

During the pouring process of cast-in-situ piles, the height of the concrete in the guide tube will be higher than the concrete liquid level in the pile, and the part of the concrete higher than the concrete liquid level in the pile is defined as the remaining material in the guide tube, and this part of the remaining material will further increase The height of the cast-in-place pile causes material waste

And during the pouring process, most construction companies will not do any treatment on the strength of the overfilled concrete on the top of the pile. This will undoubtedly further increase the difficulty of removing the top of the cast-in-situ pile after the pouring is completed.

Images