การพัฒนาเทคนิควิธีการและการออกแบบวัสดุเชื่อมต่อประสานส่วนของเขื่อนดินเดิมกับส่วนซ่อมแซมใหม่สำหรับการบริหารจัดการปรับปรุงเขื่อนดินที่วิบัติ (เขื่อนขาด)

บทคัดย่อ

3 earth dam in upper northem Thailand collapse from overtopping during 2005 to 2012. Conventional practice in dam renovation is by stripping existing dam and built new dam effected high cost of dam renovation. To reduce dam renovation cost, renovation at collapse zone is proposed and concentrated between new dam and existing dam should have transition zone (Inter-sealant material) u.hich settlement behavior exhibited between new dam and existing dam. Reducing dam renovation cost bring about research of development of technique and inter-sealant materiai befween existing dam and neu 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.5oh 3.0% 4.5% and 6.0oh respectively. Cement mixing influence to reduce Compression index (Cc) while bentonite mixing influence to increase Compression index (Cc). GM-GC mixed with cement-bentonite Compression index (Cc) change -2i.i3g% -41.540% -19.695% -21.637% and GM-GC mixed with with cement Compression index (Cc) change -67.406% -72.399% -63.662% -75.798% respectively. SM-SC mixed with cementbentonite Compression index (Cc) change +3.082% -40.925% -47.260% -50.00% and SM-SC mixed with cemenr Compression index (Cc) change +8."133% -51.543% "/0.890% -70.890%. ML-CL mixed with cemenr-bentonite Compression index (Cc) change +34.330o/o -66.961% -66.145%63S70% and ML-CL mixed with cement Compression index (Cc) change -40.177% -64.446% -65.126% -75.323% respectiveiy. Design of Inter-sealant material 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 material and new dam material. For new dam crest should have sufficient camber.

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