Horizontal displacement monitoring method for pier column in bridge pile foundation underpinning

Abstract

The invention discloses a horizontal displacement monitoring method for a pier column in bridge pile foundation underpinning. The method comprises the following steps of: (1) arranging monitoring points, namely correspondingly arranging the monitoring points at the top and the bottom of the pier column in groups up and down; (2) burying monitoring points: burying a monitoring mark at a horizontaldisplacement monitoring point; (3) observation and data acquisition: monitoring the horizontal displacement of the pier column by using a total station and adopting a polar coordinate method; and (4)data processing and analysis: 1) carrying out data transmission and adjustment calculation to obtain coordinates of each monitoring point; and 2) analyzing the stability of the monitoring points according to the adjustment calculation result, and judging whether the horizontal displacement of the pier column is changed or not by combining a comparison result of the maximum deformation and a maximum measurement error of the monitoring points in two adjacent stages. According to the horizontal displacement monitoring method, deformation and displacement of the pier column can be continuously monitored and fed back, whether horizontal displacement happens to the pier column or not is judged according to the monitoring method, and the stability and safety of the pile foundation underpinning construction process are improved.

Description

technical field [0001] The invention relates to the technical field of foundation treatment and foundation reinforcement of existing buildings, in particular to a horizontal displacement monitoring method for bridge pile foundation underpinning middle pier columns. Background technique [0002] During the construction of the pile foundation underpinning project, the bridge pier columns will be affected, resulting in settlement, deformation, and even cracking and damage of the pier columns, so strict control should be given. In the existing technology, during the pile foundation underpinning construction process, the inspection of the settlement and deformation of the pier column is mainly done by one-time inspection whether it meets the standard or regular measurement, and there is no continuous monitoring of the change of the pier column. The existing regular or interval inspection methods have the defect of incomplete monitoring, and monitoring omissions will occur for chr...

AI Technical Summary

Problems solved by technology

In the existing technology, during the pile foundation underpinning construction process, the inspection of the settlement and deformation of the pier column is mainly done by one-time inspection whether it meets the standard or regular measurement, and there is no continuous monitoring of the change of the pier column. The existing regular or interval inspection methods have the defect of incomplete monitoring, and there will be monitoring omissions for the performance of pier columns with chronic changes, which will bring other safety hazards

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