7/28/2019 Bearing Capacity(SPTM27 1&2)

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BOREHOLE NO. SPT 1 & SPT 2

Neq

(blows/30cm) (blows/30cm) (blows/30cm) (blows/30cm) 1.5 2.0 3.0 4.5

0.5 5 9 6 11 11 2.8 2.4 2.1 3.0

1.0 7 11 7 11 11 3.0 2.7 2.2 3.0

1.5 8 12 9 13 13 3.0 2.9 2.3 3.0

2.0 9 13 8 11 12 3.0 2.9 3.0 3.0

2.5 10 14 14 19 19 3.0 3.0 3.0 3.0

3.0 11 15 18 24 23 3.0 3.0 3.0 3.0

3.5 11 14 8 10 11 3.0 3.0 3.0 3.0

4.0 11 14 7 9 10 2.7 3.0 3.0 3.0

5.0 16 20 13 16 16 3.0 3.0 3.0 3.0

6.0 3 4 5 6 6 3.0 3.0 3.0 3.0

7.0 15 17 12 14 14 3.0 3.0 3.0 3.08.0 50/12 100 50/5 100 100 3.0 3.0 3.0 3.0

9.0 50/10 100 50/10 100 100 3.0 3.0 3.0 3.0

10.0 50/7 100 50/3 100 100 3.0 3.0 3.0 3.0

NOTES:

qa = N Kd B F4F1 SI Fps SI Fps

2 F1 0.05 2.5 0.04 2qa = N B+F3 Kd B > F4 F2 0.08 4 0.06 3.2

F2 B F3 0.3 1

F4 1.2 4

where qa =

Kd = 1+(0.33 x D) 1.33

B

N =

4. Neq = nrx Npillar+ (1-nr) Nsoil where nr= r2/s

2; r = 1.15m, Grid spacing, s = 6.0m

Project

Owner Public Authority for Housing Welfare

Contractor Mushrif Trading & Contracting Co.

10.12

JO # 08690

for overburden pressure. This was in accordance with the client's requirements.

allowable bearing pressure for 25mm or 1-in settlement, kPa or ksf

D = Footing depth (m)

Same

B = Footing Width (m)

Nfield

(pillar)

(SPT 1)

Ncorrected

(soil)(SPT 2)

1. The net allowable bearing capacity is calculated using the following Meyerhof equation as modified by Bowles:

Ncorrected

(pillar)(SPT 1)

Nfield

(soil)

(SPT 2)

Depth

(m)

Net Allowable Bearing Capacity (Kg/cm2)

For Footing Widths (m)

Table 1.1

SPT value (N is the statistical average value of N for the footing influence

Net Allowable Bearing

Capacity For Zone M27

zone about 0.5B above the footing base to atleast 2B below).

3. Ncorrected = Nfield x Cn where Cn = 0.77 log(20/p'); p' = Effective Overburden Pressure (tsf)

Net Allowable Bearing Capacity (Kg/cm2)

Soil Improvement Works for Kuwait New Cities At

North West Sulaibikhat, Kuwait

Allowable Bearing Pressure calculated as per Meyerhof Equation modified by Bowles

N70

It is common practice in State of Kuwait to limit the bearing capacity value for isolated footings to 300 kPa (3 kg/cm2). This practice

was set and is still being followed by the official Government Center for Testing & Laboratories of the Ministry of Public Works,

State of Kuwait.

2. For this report, the number of blows, N, used in the above equations are the N values corrected

Same

N55

INCO - LABSFor Testing: Materials, Soil, Surveying, & Environmental Research

P.O.Box: 21073, Safat 13071,Kuwait. Tel (965) 4710780. Fax (965) 4716526

7/28/2019 Bearing Capacity(SPTM27 1&2)

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Unit Weight of soil 18 kN/m3

Depth of GW 1.42 m

Depth Depth effective stress effective stress CN N

m ft kN/m2 tsf 0.5 1.64 9 0.084 1.83 5

1 3.28 18 0.168 1.60 7

1.5 4.92 26.216 0.244 1.47 8

2 6.56 30.316 0.283 1.42 9

2.5 8.20 34.416 0.321 1.38 10

3 9.84 38.516 0.359 1.34 11

3.5 11.48 42.616 0.397 1.31 11

4 13.12 46.716 0.436 1.28 11

5 16.40 54.916 0.512 1.23 16

6 19.69 63.116 0.588 1.18 3

7 22.97 71.316 0.665 1.14 15

8 26.25 79.516 0.741 1.10 100

9 29.53 87.716 0.818 1.07 100

10 32.81 95.916 0.894 1.04 100

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NC

Blow /15cm Blow /15cm9 3 2

11 3 4

12 4 4

13 4 5

14 4 6

15 5 6

14 5 6

14 6 5

20 8 8

4 1 2

17 6 9

100 100 0

100 100 0

100 100 0

units of p' should be tsf

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Unit Weight of soil 18 kN/m3

Depth of GW 1.44 m

Depth Depth effective stress effective stress CN N

m ft kN/m2 tsf 0.5 1.64 9 0.084 1.83 6

1 3.28 18 0.168 1.60 7

1.5 4.92 26.412 0.246 1.47 9

2 6.56 30.512 0.284 1.42 8

2.5 8.20 34.612 0.323 1.38 14

3 9.84 38.712 0.361 1.34 18

3.5 11.48 42.812 0.399 1.31 8

4 13.12 46.912 0.437 1.28 7

5 16.40 55.112 0.514 1.22 13

6 19.69 63.312 0.590 1.18 5

7 22.97 71.512 0.667 1.14 12

8 26.25 79.712 0.743 1.10 100

9 29.53 87.912 0.820 1.07 100

10 32.81 96.112 0.896 1.04 100

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NC

Blow /15cm Blow /15cm11 2 4

11 4 3

13 4 5

11 3 5

19 6 8

24 8 10

10 4 4

9 3 4

16 6 7

6 3 2

14 5 7

100 100 0

100 100 0

100 100 0

units of p' should be tsf