การเปรียบเทียบการออกแบบโครงสร้างชั้นทางหยุ่นตัวตามวิธี The Asphalt Institute แบบเก่ากับแบบใหม่

Comparison of Flexible Pavement Design by the Old and New Concepts of the Asphalt Institute Method

Name: ปิยะ รัตนสุวรรณ

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Flexible pavement

; Equivalent 80 kN single Axle Load

; โครงสร้างชั้นทางหยุ่นตัว

Abstract: Pavement design methods for the road in Thailand are adapated from the ones employed in some other countries such as the flexible pavement design method of the Asphalt Institute in the United States. The flexible pavement is generally designed forthe service life of 7 years. After that the pavement will be strengthened by overlaying with additional thickness of asphalt concrete surface lengthening the service life more longer. The presently used design method tends to follow the Asphalt Institute thickness design manual for the eighth edition which was developed in 1969. This design method developed on the basis of the result from the laboratory test as well as the road test. The pavement design method developed on basis of the test results is generally know to be an empirical approach. In 1982 the Asphalt Institute published the flexible pavement design manual for the ninth edition. The design parameters for the design manual of the ninth edition might be stress, strian or deflection incuded in the pavement layers. Comparing the induce values of some selected parameters with the adopted criteria, the pavement thicknesses could be determined. Designing the pavement layers by employing the employing the stress, strain or deflection criteria as a basis is generally know as an analytical approach. This reseach project has the objective of comparing the resultof the pavement design by both method on babsis of the same design data.Design data are from 25 roads of the Department of Highways having the Subgrade CBR of 2, 3, 4, 5, 6 and 10 with the ADT of 1,000-10,000 vpd. In making the pavement analysis following the ninth edition of the Asphalt Institute design manual, the Truckfactor has to be know for estimating the number of Equivalent Axel Load (EAL) Repetition for each road. Various value of Truck Factor are assumed to be 0.8, 1.0, 1.2, 1.4, 1.6, 2.0, 2.4, 3.0 and 3.6 for obtainig different EAL for comparision. Results of pavement analysis by both methods of design indicated that the full depth Asphalt thickness (TA) could be greater or smaller for the nith edition depending on the Subgrade CBR, Truck Factor and EAL. For greater values of the Subgrade CBR, Truck Factor and EAL, the TA value for the ninth edition tends to be greater than the eighth edition.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: ดร. ธีระชาติ รื่นไกรฤกษ์

Role: อาจารย์ที่ปรึกษา

Created: 2533

Issued: 2005-04-15

Modified: 2006-05-31

วิทยานิพนธ์/Thesis

ISBN: 9748154653

CallNumber: CVE326

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: วิศวกรรมโยธา

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	CVE326.pdf	16.78 MB	169	2024-02-10 20:46:02
2	CVE326ab.pdf	87.16 KB	53	2020-02-14 10:25:03
3	CVE326ab.smi	2.57 KB	31	2020-02-14 10:25:15

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