การทดสอบและวิเคราะห์วัสดุเชื่อมต่อประสานส่วนของเขื่อนดินเดิมกับส่วนซ่อมแซมใหม่สำหรับการบริหารจัดการปรับปรุงเขื่อนดินที่วิบัติ (เขื่อนขาด)

บทคัดย่อ

3 earth dam in upper northem Thailand collapse from overtopping during 2005 b 2A12. Conventional practice in dam renovation is by stripping existing dam and built new dam effected high cost ofdam renovation. To reduce dam renovation cost, renovation at coliapse zone is proposed and concentrated between new dam and existing darn should have transition zone (Inter-sealant material) which settlement behavior exhibited between new dam and existing dam. Reducing dam renovation cost bring about research of development of technique and inter-sealant materiai between existing dam and nelv dam for renovate and improvement collapse earth dam. Laboratory testing procedure is by mixed base material GM-GC SM-SC and ML-CL with cement-bentonite and cement at l.5o/o 3.Oo 4.5o/o and 6.00/o respectively. Cement mlxing influence to reduce Compression index (Cc) while bentonite mixing influence to increase Compression index (Cc). GM-GC mixedwith cement-bentonite Compression index (Cc) change from0.1442 to 0.1042 0.0843 0.1158 0.1130 and GM-GC mixed with with cement Compression index (Cc) change from 0.1442 to A.0470 0.0398 0.0524 0.0349 respectively. SM-SC mixed with cement-bentonite Compression index (Cc) change from 0.0584 to 0.0602 0.0345 0.0308 0.0292 and SM-SC mixed with cement Compression index (Cc) change from 0.0584 to 0.635 0.0283 0.0170 0.0170. ML-CL mixed with cement-bentonite Compression index (Cc) change from 0.1471 to 0.1976 0.0486 0.0498 0.0530 and ML-CL mixed with cement Compression index (Cc) change from 0.0584 to 0.0880 0.0523 0.0513 0.0363 respectively. Design of Intersealant materiai between existing dam and new dam for renovate and improvement collapse earth dam have to use Compression index (Cc) of sealant material between existing base materiai and new dam material. For new dam crest should have sufficient camber.

คำสำคัญ