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3. 
QUALITY MONITORING OF LARGE STEEL BUILDINGS USING TERRESTRIAL 
LIDAR TECHNIQUE 
Yanmin Wang ^ Guoli Wang an 
a. School of Geometrics and Urban Information, Beijing University of Civil engineering and 
Architecture, 1 Zhanlanguan Road, Xicheng District, Beijing, 100044, P.R. China 
b. State Key lab for Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Luoyu 
Road, Wuhan, 430079, P.R. China 
Commission III, WCIII/2 
Key word: Terrestrial LIDAR, Point cloud, Extraction of feature points, Construction Quality Monitoring. 
Abstract: Terrestrial LIDAR Technology is used for quality monitoring in construction of large-scale steel buildings to solve the 
problem of quick and precise inspecting for large steel structure. Point Cloud is acquired fast and of high accuracy with tie-control 
points that set in different blocks. Feature points are extracted from scan data and compared with its reference points designed to 
analyze its variation of position and size, which has active guidance meaning for engineering construction. Finally three applications 
are given to prove the effectiveness of the method proposed. 
1. INTRUDUCTION 
Modern Large-scale steel building becomes more and 
more popular with the development of construction and 
surveying technique. For examples, 2008 Beijing 
Olympic Main Stadium (Bird’s Nest), National 
Gymnasium and Tianjin West Station Steel-Shell Station 
Building etc. all of these Large steel building have their 
unique appearances; The steel-structure are complex and 
heavy; It is generally assembled on ground and installed 
with big crane; Thus accurate surveying and checking is 
necessary to make the steel structure weld and installed 
successfully. 
Total station is used in traditional quality monitoring to 
observe the components of steel ports and the quality of 
welding is compared with observed point feature which 
includes observing errors (Xiangrui Guo, 2002). The 
fieldwork is hard and surveying features is partially 
hidden. Besides, some feature points designed don’t exist 
actually so it’s impossible to get the data of points. Thus 
the data acquired is limited for the complex and 
featureless areas. 
Terrestrial LIDAR could acquire precise 3D coordinates 
of objects within hundreds of meters all around quickly 
and accurately, which meet the demands for surveying of 
featureless areas. Integrated analysis of target could be 
made conveniently with the extracted features; the 
measured distance and accuracy also satisfy the 
requirement for construct survey and quality monitoring. 
There has been some research and application in LIDAR 
technique in China (Haiying Fan, 2004; Dean Luo, 2005; 
Yanmin Wang, 2009).0.Monserrat (2008) use least 
squares 3D surface matching method to estimate 
  
deformation parameters using local surface matching, 
Van Gosliga et al. (2006) use a cylinder parameterization 
to model a tunnel, while Alba et al. (2006) follow this 
approach for the structural monitoring of a large dam by 
fitting a 3D polynomial surface to the surveyed TLS point 
cloud. Eleftherios TOURNAS (2008) use the control 
points on images captured synchronized to measure the 
structural deformation. Girardeau-Montaut (2005) use 
octree structured Terrestrial LIDAR data to make a direct 
cloud to cloud comparison, which can be useful for fast 
and quick integrated analysis. 
2. FAST AND PRECISE TERRESTRIAL LIDAR 
ACQUIRING TECHNIQUE 
Terrestrial laser scanner measures spatial object with dense laser 
beam in accordance with array, acquires the spatial points by 
laser ranging and stepping motors accurate measurement of the 
angle, forms a point cloud model which is composed of discrete 
points of dense space. The whole technological process includes 
three key technologies: connection of control network, fast data 
acquiring and extraction of feature points. 
2.1 Connection of scan sites and control network 
Multi-view scans are needed to cover an object. Control survey 
is intended to put a general amount of architectural construction 
with high registration accuracy into the datum coordination of 
survey or design to facilitate the comparative analysis of the 
data. 
Control points are selected according to the actual site 
conditions, more alternate points are selected in case of the 
Corresponding author. Fax: +0086 010-68322511 Email: wgli 1(2163.com