the decrease of strength because of water

• Main Authors: len, e lon, 藍義隆
• Other Authors: jyh dong lin
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/13849523295242689510

碩士 === 國立中央大學 === 土木工程學系 === 86 === Due to the subtropical situation of Taiwan, the rain in summer is much and long, and consequently the holes appear on the ground. Since long time ago, it costs much manpower and material resource to maintain the freeway every year. This research focused on the section (from Hsin-Chu to Tou-feng)of the freeway to study the decrease of strength because of water. In the research, drilling is executed at the shoulder of the No.1 Freeway beginning form 103K to 109K, then the performance tests with resilient modulus test,indirect tensile strength test and AECS are used.In AECS test, the decreasing rate of resilient modulus soaking in water in three days about 1 to 10%, and soaking in water in seven days is about -2 to 23%. The later !is more obvious than the front . The decreasing rate of the test is about 30%.We can obtain the decreasing condition and the relation between saturation and bearing force on embankment from CBR and resilient modulus test. It shows that soaking in water affects the bearing force , the decreasing rate obtained from CBR test is 40.5%. Using BASIR program to execute the sensitive analysis on embankment , the compressive strain increasing on the base ground is larger than Bituminous Treated Base , after soaking in water, and it is the critical condition of destruction.