Geotechnical Engineering

DHARM 400 GEOTECHNICAL ENGINEERING line, as shown in Fig. 11.4(a). (Although some rebound and some recompression occur during th ...

DHARM SETTLEMENT ANALYSIS 401 11.4.2 Correction for Lateral Strain The assumption that the soil does not undergo lateral strain ...

DHARM 402 GEOTECHNICAL ENGINEERING maximum value, especially during the early stages of settlement. However, the structural memb ...

DHARM SETTLEMENT ANALYSIS 403 The flexible building shown in Fig. 11.6(a) will exert on the soil just below it a pressure distri ...

DHARM 404 GEOTECHNICAL ENGINEERING The effect of this horizontal drainage is to accelerate the time-rate of consolidation when c ...

DHARM SETTLEMENT ANALYSIS 405 Many building codes and foundation authorities place restriction on differential settle- ment. Ter ...

DHARM 406 GEOTECHNICAL ENGINEERING Isolated foundations Raft foundations Sl. Type of Structure Sand and hard clay Plastic clay S ...

DHARM SETTLEMENT ANALYSIS 407 In order to make large settlements harmless, structures may be designed as statically determinate ...

DHARM 408 GEOTECHNICAL ENGINEERING (a) Clay (saturated) ( = 0, perfectly elastic)f (b) Sand (c = 0) (c) c- soilf Fig. 11.8 Conta ...

DHARM SETTLEMENT ANALYSIS 409 Terzaghi pointed out that the depth, Dn, of the (1/n) (q)-isobar increases in direct pro- portion ...

DHARM 410 GEOTECHNICAL ENGINEERING base of the foundation and decreases with depth in a curvilinear fashion based on the theory ...

DHARM SETTLEMENT ANALYSIS 411 11.9 ILLUSTRATIVE EXAMPLES Example 11.1: A reinforced concrete foundation, of dimensions 18 m × 36 ...

DHARM 412 GEOTECHNICAL ENGINEERING 25 m X 50 m 200 m 50 m 25 m X 50 m 150 m 50 m 1 50 m 2 3 (a) Plan of heap (b) Division into r ...

DHARM SETTLEMENT ANALYSIS 413 Dense sand 9m gsat= 18.9 kN/m^3 3m Clay G = 2.70w = 40.5% LL = 54% Hard rock 3.6 m 1.8 m 1.8 m 3.6 ...

DHARM 414 GEOTECHNICAL ENGINEERING Example 11.5: A clay stratum of 18 metres thickness was found above a sand stratum when a bor ...

DHARM SETTLEMENT ANALYSIS 415 12 m 48 m 6m 24 m 12 m Centre of clay layer (a) Plan (b) Pictorial view Fig. 11.16 Details of foun ...

DHARM 416 GEOTECHNICAL ENGINEERING Example 11.7: The loading period for a building extended from Feb., 1957 to Feb., 1959. In Fe ...

DHARM SETTLEMENT ANALYSIS 417 Estimate: (i) the ultimate settlement, (ii) the settlement at the end of the loading period, and ( ...

DHARM 418 GEOTECHNICAL ENGINEERING 18 m 9m 54 m 27 m 30 m Hard rock Clay G.W.T. 3m 6m 1.5 m Sandgsat= 18 kN/m ; N = 18^3 m = 0.0 ...

DHARM SETTLEMENT ANALYSIS 419 ∴ Si for sand = 2 × 48.7 = 97.4 mm Clay: With reference to Fig. 11.3(b), H 1 = 4.5 m; H 2 = 34.5 m ...