Research On 4D Construction Information Model For Core Rock-fill Dam And Its Application

Core rock-fill dam produces massive and multi-source construction information during its construction process.The information reflects characteristics and changes of construction process.Thus whether the construction information can be fully recognized and reasonably used concerns the success or failure of the project.However,there is a lack of in-depth analysis of multi-sources of construction information and research of the dynamic integration of multi-source construction information.Current research doesn’t realize the effective integration and sharing of multi-source construction information,which cannot satisfy the need of visually and directly analyzing the construction process.On account of the questions above,this paper analyzes the multi-sources of the construction information in-depth firstly,then 4D construction information model and its framework are proposed based on the earlier analysis.The method of the establishment of the 4D construction information model are mainly researched,which include the method of the establishment of the 3D model of the core rock-fill dam,the integration of multi-source construction information and the 4D visualization of the construction process of the core rock-fill dam and etal.Based on a project,Based on an engineering project,the integration and interactive analysis of multi-source information and 4D visualization of the construction process are realized based on 3DGIS,which offer theoretical and technical support for site control and management.The achievements of this paper are as follows:(1)the multi-sources of the construction information is analyzed systematically,then 4D construction information model and its mathematical model are proposed.Next the framework of the 4D construction information is researched,which lay the foundation of the dynamical and visual integration of the multi-source construction information in theory.(2)the method of the establishment of the 4D construction information model,which includes:(a)make use of CATIA to establish the 3D model of the core rock-fill dam,the key techniques of CATIA are researched,which lay the 3D model foundation of the 4D construction information model;(b)the organization and management of the 3D model are researched based on the 3DGIS,and the restructure of the 3D model is realized;(c)the method of the integration of multi-source information is researched,which includes the framework and key techniques of multi-source information,the correlation method between multi-source information and 3D model that realizes the dynamic integration between the 3D model and multi-source information;(d)the method of 4D visualization of the construction process of the core rock-fill dam is researched based on 3DGIS,VTK is used to realize the dynamic display of the face of the 3D model.(3)Based on a core rock fill dam project locating in the southwestern china,considering the need of the integration and visual management of the construction information,4D visualization of construction information system for core rock fill dam is developed using C/S mode.This system not only realize the integration and visual analysis of construction information but also the 4D visualization of the construction process,which offers important measure for site control and management.