Analysis of Pavement Monitoring Data at Chiang Kai-Shek International Airport
Date Issued
2004
Date
2004
Author(s)
Cheng, Hsiang-Jen
DOI
zh-TW
Abstract
“Pavement Monitoring and Analysis for Chiang Kai-Shek International Airport ” is the first large-scale monitoring project on airport pavement in Taiwan, and it is a newly growing research area in the field of pavement management system. This paper mainly analyzes the monitoring data of optical fiber sensors and positioning gauges of nose gear in this project. Optical fiber sensors are primarily used to measure the joint movements of the instrumented slab, while positioning gauges are used to collect large amount of aircraft positioning data on the N1 taxiway at CKS Airport. Through the analysis, it is expected to research on the field joint movements under the weather condition and investigate the taxiing patterns on the taxiway at CKS airport to establish the basis for slab fatigue analysis of long-term repetitive loadings.
Based on the observed data of optical fiber sensors, it is found that the joint movements are more significantly affected by air temperature than the hydration reaction around 20 days after pouring. Four days after saw cutting, the depth of induced crack is down to 16cm from the top and the width is approximately 0.29mm. Joint movements behavior affected by seasonal temperature change are clustered into two groups: cold seasons（Jan. to Mar., Oct. to Dec.）and hot seasons（Apr. to Sep.）. The joint movements regarding temperature change is about 0.035mm per degree centigrade, and the strain due to temperature change is 5×10-6/℃. By utilizing the air temperature to the prediction models, joint movements are efficiently predicted both in low-temperature and high-temperature seasons. Restrained stress is calculated from restrained strain, which is by subtracting the measured joint movement from theoretical joint movement under free condition at different temperature changes. It is found that the maximum tensile and compressive horizontal thermal stresses might happen in Jan.（9kg/cm2, 128psi）and Sep.（41kg/cm2, 583psi）, based on the field data, respectively. Further analysis found that maximum tensile horizontal thermal stress would occur in Jan. if pavement construction conducted in August. Therefore, it is concluded that avoidance of the pavement construction at hot season（Jun. to Aug.）would help reduce the probability of high tensile stress in cold season.
By combining FAMOS and EXCEL program, the analyzing procedure of nose gear position is developed. After analyzing a large amount of aircraft taxiing data, it is found that aircrafts taxiing pattern follows the normal distribution with 50.4cm as standard deviation. However, compared with narrow-body aircraft, taxiing behavior of wide-body aircrafts is more diversified and slightly shifts to the left of centerline.
Subjects
接縫變化
航機橫向交通量分佈
剛性鋪面
鋪面監測
版塊溫度應力
Joint Movements
Pavement Monitoring
Slab Horizontal Thermal Stress
Aircraft Transverse Traffic Distribution
Airport Pavement
Type
thesis
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