Monitoring Method of Layered Horizontal Displacement of Multi-storey Floors

Abstract

The invention discloses a multilayer floor slab layered horizontal displacement monitoring method. The method includes the following steps that forced centering devices are installed on a first-layer floor slab; positions of digital display light targets are adjusted to enable outer contours of the digital display light targets to be parallel with a building axis, and the digital display light targets are fixed to layers of to-be-monitored floor slabs respectively; a total station is erected on forced centering horizontal displacement control observation pillars; the total station measures and obtains center coordinates of the forced centering devices; a laser plummet is started to project laser signals to layers of the to-be-monitored floor slabs; light sources sent out by the laser plummet are supported by the to-be-monitored floor slabs layer by layer through the digital display light targets, the laser plummet is sequentially rotated to enable the laser plummet to project points in different directions of 0 degree, 90 degrees, 180 degrees and 270 degrees, four groups of grid coordinate data read by the digital display light targets on the floor slabs are recorded, and average values of the four groups of grid coordinate data are calculated to serve as monitoring data; displacement of horizontal displacement monitoring points of floor slabs is obtained. The method has the advantages of saving time and labor and being high in precision.

Description

Technical field [0001] The invention relates to a layered horizontal displacement monitoring method of a multi-layer floor slab. Background technique [0002] The construction of the construction project disturbs the underground soil, destroys the original stress balance, and may cause the existing buildings in the surrounding affected area, especially the underground part, to shift in the horizontal displacement direction. This slight displacement will affect the main body of the existing building. The structure has an impact, resulting in changes in the internal force distribution of the building, and even affecting the quality and service life of the building. Therefore, it is necessary to monitor the deformation of the existing buildings within the affected area during the construction process. figure 1 As shown in the schematic diagram of the traditional multi-layer floor horizontal displacement monitoring method, the traditional method is to use the horizontal control points...

AI Technical Summary

Problems solved by technology

[0002] The construction of the construction project disturbs the underground soil, which destroys the original stress balance, and may cause the existing buildings in the surrounding affected area, especially the underground part, to be displaced in the horizontal displacement direction. This small displacement will affect the main body of the existing building. The impact of the structure will lead to changes in the distribution of the internal force of the building, and even affect the quality and service life of the building. Therefore, it is necessary to monitor the deformation of the existing buildings within the affected area during the construction of the construction project. Refer to figure 1 The schematic diagram of the traditional method for monitoring the horizontal displacement of multi-storey floors is shown. The traditional method is to use the horizontal control points to conduct wire measurement layer by layer, and then use the wire points to measure the displacement monitoring points, and then compare the monitoring results to obtain the floor by floor level. The amount and trend of the horizontal displacement change, this method is time-consuming and labor-intensive, and the accuracy is not high due to the influence of cumulative errors

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