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A retaining wall with a vertical back 5 m high supports cohesion less backfill of unit weight of 19 kN/m3. The upper surface of the backfill rises at an angle of 10° with the horizontal from the crest of the wall. The angle of internal friction for the soil is 30°, and the angle of wall friction is 20°. Verify the total active pressure per lineal metre of the wall and mark the direction and point of application of the thrust. Use Ruthann's graphical method.
Question What is function of a sand layer underlying paving slab or interlocking blocks? Answer Normally after laying of sub-base layer of paving slab or interlocking
Total Dynamic Head: (TDH) y-axis plot point related to each x-axis flow rate along the system curve plot. TDH = h a = TSH + h f + v 2 /2g v 2 / 2g usually small
scientific problem in construction
Q. The field density of a compacted fill is determined by means of a core cutter whose empty weight is 1000 g and volume is 1000 cm 3 . The cutter full of soil weights 2890 g. If
Define Vertical Curves - Transportation 1) Vertical curves are used to change the grade of a highway. 2) Most vertical curves take the shape of an equal-tangent parabola.
Q. Potential advantages of segmental tunnelling when compared with hand-shield pipe-jacking? In segmental tunnelling, jacks are installed at the shield so that itisn't necessar
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what is the heat of hydration and gel space ratio?
Question In modeling a nonrigid mat foundation by using elastic springs, have a uniform modulus of subgrade reaction be used along whole base of mat ? Answer A bed of
NaCl->AgNO3
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