Method for measuring deformation of underground diaphragm wall

Abstract

The invention discloses a method for measuring deformation of an underground diaphragm wall. In the aspect of data acquisition, a three-dimensional laser scanner is adopted and is capable of quickly measuring three-dimensional coordinates of the underground diaphragm wall; working base points are used as joint control points, a control network is established through the layout of deformation monitoring working base points and datum points, the underground diaphragm wall and the working base points can be simultaneously scanned, and point clouds of the underground diaphragm wall can be registered in an absolute coordinate system of the control network. In the aspect of data processing, a point cloud regular gridding modeling technology is adopted to reconstruct a three-dimensional model of the underground diaphragm wall. By comparing the three-dimensional models of the underground diaphragm wall in different periods, the deformation of all the positions of the underground diaphragm wall can be obtained. Through the method, the overall deformation of the underground diaphragm wall can be measured in the excavation process of a foundation pit, monitoring points do not need to be laid, interference on the construction is reduced, the measuring efficiency is high, and comprehensive monitoring data are provided for the excavation of the foundation pit.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering monitoring, and relates to the deformation monitoring technology of foundation pit engineering, in particular to the deformation monitoring technology of foundation pit engineering with an underground diaphragm wall as the enclosure structure. Background technique [0002] With the rapid development of urban construction, urban land resources are becoming more and more scarce, and it has become a trend for building land to develop into underground space, and there are more and more foundation pit engineering projects. Due to the many uncertain factors in the engineering geological survey and design and construction plan, coupled with the dense urban buildings, the excavation of the foundation pit will affect the stability of the surrounding buildings, so the deformation of the enclosure structure and the Surrounding environmental impact monitoring has become an indispensable lin...

AI Technical Summary

Problems solved by technology

However, this monitoring method can only obtain deformation data of certain sections, and cannot accurately reflect the overall deformation information of the foundation pit.

Images