A settlement monitoring device and method for a high-support formwork

Abstract

The invention discloses a high formwork settlement monitoring device and method. The reference point is set at the lower end and inserted into and fixed on the column of the bedrock layer, and the column is supported by the bedrock layer with stable geological properties, so that the reference point set on the column The point will not settle due to the settlement of the soft soil layer in the corresponding area, so as to ensure that the reference point remains stationary; the monitoring point is set on the high-support formwork to settle synchronously with the high-support formwork, and the monitoring points are monitored by drones, cameras and lasers. With the cooperation of the rangefinder, the laser rangefinder is used to measure the straight-line distance between the laser rangefinder and the monitoring point at the second position where the vertical distance between the laser rangefinder and the reference point is H, and the corresponding first straight line is successively obtained. distance L 1 and the second straight line distance L 2 , and the first angle a and the second angle β are used for calculation and analysis, and the vertical height change value D of the monitoring point is obtained, so as to accurately judge whether the high branch formwork has settled and the settlement amount.

Description

Technical field [0001] Technical Field The present invention relates to monitoring of construction, and more particularly to a method and apparatus for monitoring subsidence high formwork. Background technique [0002] With the social and economic development, the scale of construction work is growing, more and more construction projects require the use of high formwork auxiliary operations. High formwork height is generally from a few meters to ten meters, some even up to tens of meters. Generally the greater the height, high formwork, the greater the load, during the construction process, high formwork system occurs the greater the likelihood of collapse, and once in the construction process, high formwork system collapse occurred, will resulting in workers on the Qunsiqunshang, causing a larger, even major construction accidents. Thus, in the construction process, the need for safety monitoring of high-count mode to determine the index value higher formwork exceeds a safe rang...

AI Technical Summary

Problems solved by technology

[0004] Among them, the total station is based on the principle of optical testing. Although it can roughly realize the settlement monitoring of most high-supported forms, it still has the following deficiencies: 1. In the process of monitoring the overall settlement of the forms, due to the stability of the soft soil layer It is weak and prone to local changes due to the rise and fall of the water level or the effect of external pressure, so the reference point set on the surface of the soft soil layer (or called the ground) (the reference point refers to the need to keep still during the monitoring process) The reference point) is easy to settle with the settlement of the surface of the soft soil layer, resulting in its own settlement error and affecting the reliability of monitoring data

2. When the internal rods of the high-support formwork are dense, it is difficult to find a suitable measuring point for the total station to realize all-round one-point measurement; Monitoring labor costs are high

However, there are still deficiencies in the method of using the laser range finder to monitor the high branch form. The reason is that the first laser range finder is installed on the top of the high support form above the reference point, and by monitoring the distance between it and the reference point In addition to the settlement, the high-branch mode may also be tilted. Once the tilt occurs, the laser emission angle of the first laser rangefinder will follow and change, and it will no longer be vertically opposite to the reference point, resulting in monitoring The distance to be reached is no longer the vertical distance, which will lead to deviations in monitoring results (and the greater the inclination angle, the greater the deviation), which will affect the accuracy of monitoring data and eventually lead to the possibility of safety misjudgment

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