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Base line-based subway tunnel horizontal displacement deformation monitoring method

A technology of horizontal displacement and deformation monitoring, applied in the field of surveying and mapping science, can solve the problems of unreliable deformation monitoring results, erroneous deformation monitoring results, rear crossing errors, etc. Effect

Active Publication Date: 2017-05-10
HOHAI UNIV
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  • Application Information

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Problems solved by technology

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

Method used

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  • Base line-based subway tunnel horizontal displacement deformation monitoring method
  • Base line-based subway tunnel horizontal displacement deformation monitoring method
  • Base line-based subway tunnel horizontal displacement deformation monitoring method

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Embodiment Construction

[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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Abstract

The invention discloses a base line-based subway tunnel horizontal displacement deformation monitoring method. The base line-based subway tunnel horizontal displacement deformation monitoring method comprises following steps: 1, erection of a total station is carried out, and the total station is used for acquiring two stage controlling point coordinate data; 2, two stage control base line vectors are calculated based on the two stage controlling point coordinates respectively; 3, a base line coordinate system is established based on the two stage control base line vectors; 4, the total station is used for acquiring two stage monitoring point plane coordinate data; 5, monitoring base line vectors are calculated based on controlling point coordinates and monitoring point coordinates; 6, projection of the monitoring base line vectors onto the base line coordinate system is carried out so as to obtain the components of the monitoring base line vectors in the X coordinate axis direction and the Y coordinate axis direction; and 7, the components of a same monitoring base line vector in two stages in the base line coordinate system are compared so as to obtain the deformation of the monitoring point in directions parallel to track and vertical to track in adjacent two stages. The base line-based subway tunnel horizontal displacement deformation monitoring method is capable of eliminating influences of errors caused by rendezvous and directional introduction, test process is simple and flexible, operation time is shortened greatly, and working efficiency is increased.

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...

Claims

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Application Information

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IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 沈月千黄腾高鹏
Owner HOHAI UNIV
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