A Baseline-Based Monitoring Method for Horizontal Displacement and Deformation of Subway Tunnel
A horizontal displacement and deformation monitoring technology, which is applied in the field of surveying and mapping science, can solve problems such as unreliable deformation monitoring results, wrong deformation monitoring results, and rear intersection errors, etc., and achieve simple and flexible testing processes, arbitrary stand positions, and improved operating efficiency. Effect
Active Publication Date: 2019-03-12
HOHAI UNIV
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In fact, the above measurement process will introduce two parts of error, one is the error caused by resection, and the other is the error caused by orientation
However, experience has shown that in the field of precision engineering measurement, even small errors can lead to erroneous or unreliable deformation monitoring results
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[0020] Such as figure 1 and 2 As shown, a baseline-based monitoring method for horizontal displacement and deformation of subway tunnels includes the following steps:
[0021] (1) Set up the total station, and use the total station to collect the coordinate data of the two control points. The total station is set up between the two points, and the observation values of the control points A and B in each period are the plane coordinates: and Among them, the subscript j=1,2 indicates the test period number;
[0022] (2) Calculate the two-period control baseline vectors according to the coordinates of the control points Among them, the subscript j=1,2 indicates the test period number;
[0023] (3) Establish a baseline coordinate system according to the control baseline vector;
[0024] (4) Use the total station to collect the plane coordinate data P of the two monitoring points ij (x ij ,y ij )i=1,2,...,n, j=1,2, where n is the number of monitoring points, and j is t...
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The invention discloses a method for monitoring the horizontal displacement and deformation of a subway tunnel based on a baseline, which comprises the following steps: (1) setting up a total station, and using the total station to collect two phases of control point coordinate data; Two-phase control baseline vector; (3) Establish a baseline coordinate system according to the control baseline vector; (4) Use the total station to collect two-phase monitoring point plane coordinate data; (5) Calculate the monitoring baseline vector according to the control point and monitoring point coordinates ; (6) Project the monitoring baseline vector to the baseline coordinate system to obtain the components of the monitoring baseline vector in the direction of the X and Y coordinate axes; (7) obtain the monitoring points by comparing the components of the same monitoring baseline vector in the baseline coordinate system in two phases The deformation of two adjacent phases parallel to the track and perpendicular to the track. The invention eliminates the influence of errors introduced by rendezvous and orientation; the test process is simple and flexible, greatly reduces operation time and improves operation efficiency.
Description
technical field [0001] The invention relates to the field of surveying and mapping science and technology, in particular to a method for monitoring the horizontal displacement and deformation of a subway tunnel based on a baseline. Background technique [0002] In modern cities, the subway has become an important tool for urban transportation because of its advantages such as fast speed, low energy consumption, large transportation volume and less pollution. Due to the rapid development of the city, it is inevitable that a large number of engineering projects will be put into construction around the subway. The construction of these projects will have an impact on the original subway tunnel structure, resulting in changes in the surrounding soil stress field and groundwater level, which will cause displacement of the tunnel structure. Make it difficult to guarantee the safety of train operation, and bring hidden dangers to the safe travel of citizens. Therefore, it is of g...
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IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 沈月千黄腾高鹏
Owner HOHAI UNIV