Deep horizontal displacement monitoring method for soil body based on remote distance measurement

Abstract

The invention relates to a deep horizontal displacement monitoring method for a soil body based on remote distance measurement, and belongs to the field of deep horizontal displacement monitoring. Thedeep horizontal displacement monitoring method comprises the steps: S1, freely placing a total station at any point P around a foundation pit, and obtaining the coordinate of the point P of a free station by observing any two known datum points C1 and C2; S2, on monitoring sections, setting all deep horizontal displacement monitoring points; S3, observing all monitoring points SC1-i on each monitoring section SC1 of the foundation pit by using the total station, thus obtaining the horizontal distance between the point P and other datum points C1 and C2 and the monitoring points SC1 and horizon dial reading, and calculating to obtain the horizontal distance between the datum point C2 and all monitoring points SC1-I; S4, calculating the horizontal displacement of the monitoring points relative to the datum points and the cumulative deformation of horizontal displacement; and S5, calculating the component of the horizontal displacement of the monitoring points in the slope direction of the foundation pit. The deep horizontal displacement monitoring method does not need drilling and is convenient in construction, the observed data can truly reflect the variation of deep horizontal displacement of a supporting structure, and the monitored deformation is more intuitive.

Description

technical field [0001] The invention relates to a method for monitoring deep horizontal displacement of soil based on distance measurement of opposite sides, and belongs to the technical field of deep horizontal displacement monitoring. Background technique [0002] The deep horizontal displacement of the foundation pit slope is divided into the deep horizontal displacement of the retaining wall (pile) and the deep horizontal displacement of the soil. A method of observing the horizontal displacement at various depths in the vertical direction with a bore inclinometer. The inclinometer tube in the support pile is completed together with the pouring construction of the support pile. There is no gap between the inclinometer tube and the pile body, and the deformation of the inclinometer tube completely represents the deformation of the support pile. The horizontal displacement represents the horizontal displacement of the supporting structure at each depth in the vertical dir...

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Problems solved by technology

[0003] After the setting of the inclinometer pipe is completed, the inclination measurement of the borehole is used to monitor the deep horizontal displacement, such as figure 1 and figure 2 As shown, this observation method is to use the inclinometer to observe the horizontal displacement of the inclinometer tube at every 0.5m in the vertical direction. Since there are many gaps between the inclinometer tube and the borehole wall, although the sand and gravel However, limited by the construction method or construction conditions, it is difficult to backfill the gap between the inclinometer tube and the soil compactly, and the deformation of the inclinometer tube is not completely consistent with the deformation of the supporting slope. The inclinometer observation The deep horizontal displacement data cannot fully reflect the deformation of the foundation pit soil slope

In addition, the use of inclinometer pipes requires drilling, which is inconvenient for construction

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