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008 110902s1979 th uu|m rtt 0| a1eng d
035 _a.b10686162
099 9 _aAIT Thesis no.AE-79-22
100 1 _aChaudhry, Abdul Karim
245 1 4 _aThe design parameters of unlined mole drains in different soil texture
260 _aBangkok :
_bAsian Institute of Technology,
_c1979
300 _a49 p.
490 1 _aThesis ;
_vno. AE-79-22
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1979
520 _aThis study, in continuation of Gupta's studies (1978), reports on the results of two soils tested by means of a model for determining the design parameters of mole drains under simulated conditions. Previously developed functional relationships for pull determination and spacing of a mole drain were analyzed. Dimensionless equations were developed for estimating pull magnitude and spacing of a drain in tested soils. Results of moisture contents on the form of mole drains showed that the moisture content should be higher than that of the lower plastic limit of soils. This confirmed Gupta results. The effect of the physical properties of soils like texture, bulk density, moisture contents and mole drain depths and-mole plow dimensions on the pull requirements were experimentally determined. Dimensionless equations were obtained for -determining the power unit required for the mole construction in tested soils. Pull magnitude for making moles varied with shear strength of soils and the mole plow dimensions. The experimental results were also reported on mole drain, flows at different depths and spacings under different water application rates. The evaluated results showed that a limited increased in mole depth created more fissures and cracks and thereby an increase in the basic infiltration rate was observed. By the least square method dimensionless equations were obtained to determine the mole spacing based upon the information's regarding rainfall intensity in the area to be drained, existing basic infiltration of the field and mole depth and diameter.
650 0 _aSoil moisture
650 0 _aDrainage
700 0 _aApichart Anukularmphai,
_eChairperson
700 1 _aOlesen, Svend Elsnab,
_eExamination Committee
700 1 _aEggers, Helmut,
_eExamination Committee
710 2 _aThe Government of Norway,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AE-79-22
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B22222
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