Use the Assign Tunnel Convergence Points command along with the Trimble Monitoring Cloud service to monitor tunnel convergence points by storing and comparing coordinates for tunnel points that have been measured in the field on multiple occasions. The cumulative data tracks movement over time resulting from tunnel deformation, which can be viewed in graphic and tabular views using the Convergence Points tab in the Tunnel View or in the customizable Tunnel Convergence Report.

Note: To use the tunnel monitoring features, you must have both a Tunneling module and Monitoring module license installed.

Following are the basic steps for this workflow. For more detailed instructions, see Monitor Tunnel Convergence Points.

Steps:

Commands:

1.

Create a project for the first (reference) epoch.

The reference epoch is required to establish a baseline of convergence point coordinates to which coordinates computed in subsequent epochs are compared to show point displacement.

In this step, you import the TXL (.txl) file containing the associated tunnel design and the convergence point data, create a Trimble Connect project in which convergence points from this and all subsequent epochs will be synchronized and stored, assign convergence points to the project, and synchronize the data.

Note: If you have not already done so, you must be logged in to Trimble Identity so that TBC has access to the Trimble Connect cloud, where monitor point data will be stored and synchronized.

New Project

Assign Tunnel Convergence Points

2.

Create a project for each subsequent epoch.

Each subsequent epoch in your Trimble Connect monitoring project will compare that epoch's convergence point coordinates with coordinates in the reference epoch and other previous epochs in the monitoring project to show point displacement over time.

New Project

Assign Tunnel Convergence Points

3.

Set Warning and Alarm thresholds for convergence points.

Specify displacement threshold values that, if exceeded, will result in displacement vector arrows displayed in graphic views to display in yellow (point displacement exceeds one or more Warning thresholds) or red (point displacement exceeds one or more Alarm thresholds).

4.

View convergence point displacement information in any of the following views:

• Plan View and 3D View
• Tunnel View
• Tunnel Convergence Report

Plan View

3D View

Tunnel View

Tunnel Convergence Report