Establishing the Resilient testing system for Study of Geocell Reinforced Sand Soil

• Main Authors: Shu-Wei Pai, 白書維
• Other Authors: Ta-Teh Chang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/36416019132507804259

碩士 === 中原大學 === 土木工程研究所 === 94 === Geosynthetics have been in use for many years as subgrade and reinforced fill. Previously, the R and CBR static penetration test values were applied to the developmental process of designing pavement thickness. For this reason, static penetration style tests were adopted to many researches of reinforcement materials. However, due to the increasing traffic quantity, static penetration style tests are unable to simulate in situ state appropriately. Thus, dynamic carrying capacity replaced static penetration testing because it satisfied the environment and loading type of the road. This research used repeated loading to conduct the test. The interface of the resilient testing system, written in LabVIEW (Laboratory Virtual Instrument Engineering Workbench), precisely controlled the stressing duration and the frequency of the test and applied the immediate artistic window graph of the test to handle the situation to raise the completeness of system control program. This study applied a custom-made, dynamic load plate testing device, which was 45.7 centimeters high, 45.7 centimeters wide, and 70 centimeters long. The study used sandy soils to fit two types of geocells with different heights and two types of circle plate with different diameters, one was 5.08 centimeters and the other was 10.16 centimeters. According to the settlement and fabric reinforced ratio, a 10-centimeter thick geocell had better fabric reinforced ratio. Will attack the number of times and divide into 100~500 and have better dynamic subgrade reaction coefficients.The result indicated that geocell reinforcement on sand subgrade could improve the loading capacity effectively.