Report NVP Foods-Bykampady

7/31/2019 Report NVP Foods-Bykampady

1/12

REPORT ON GEOTECHN ICAL IN VESTIGATIO N A T PROPOSED IN D U STRIAL BUILDIN G

AT BYKAM PADY, M ANG ALORE.

CLIENT: M / s N V P FOO DS, BYKAM PADY .

Soil inve stiga tion s conducted by:

M M AN O H AR R AO

16-66/4 Udayanagar Extn

Srinivasnagar Post

Mangalore 575 025

Ph: 0824 2475161 ; 94481 17343


2/12

CONTENTS

1 .0 Introduct ion

2 .0 Site Reconn aissan ce

3 .0 Obje ct and scope

4 .0 Det ails of investigation

5 .0 Results of investigation

6 .0 Ana lysis of results

6 .1 Bearing capa city for shallow foun dation s

6.2 Pile fou nda tions.

7 .0 Recommendat ions

Borelog


3/12

REPORT ON SOIL INV ESTIGATION CON DU CTEDAT SITE FOR PROPO SED IN DU STRIAL BUILDING A T BYKAM PADY, M AN GALORE.

1 .0 INTRODUCTION:

M / s N V P Foods, Bykampady, M angalore pr oposes to constru ct a wareh ouse at their s i te at

Bykampady Industr ia l Area. In order to evaluate bearing capacity of the si te, soi l

invest igat ion was conducted in Apri l 2012. This is a report g iv ing the observat ions made at

the site, analysis and recom m endat io ns.

2.0 SITE RECON N AISSAN CE:

The proposed site was adjacent to ODC road in Bykampady Industr ia l Area. The site was

orig inal ly a w ater logged area w hich w as f i l led up recent ly.

3.0 OBJECT AN D SCOPE:

The invest iga t ion w as carr ied out to obt a in :

a) Subsoi l str at i f icat ion

b) Physical and Engineering p rop ert ies of soi l layers

c) Level of subsoi l w ater

d) Type o f found at ion su i tab le fo r the s t ructure .

W ith t hese ob ject ives, the scope o f t he w ork com pr ised o f

a) Sinking f ive explorat ory b oreho les.

b) Condu ct ing Standard Penetr at ion Test at regular dep th in b oreho les.

c) Observing the level of subsoi l w ater.

d ) Preparing a detai led report with observat ions made at s i te, borelog, test

resu l ts and recom m endat ions.


4/12

4.0 DETAILS OF INV ESTIGATIO N:

In order t o know the so i l p ro f i le and eng ineer ing propert ies o f so i l at d i f fe rent dept hs, f ive

exploratory boreholes were sunk at locat ions shown in Fig.1 .The boreholes were sunken

upto hard strata using Calyx dri l l ing r ig. Diamond bit was used to dri l l in hard strata.

Standard Penetr at ion Test w as conducted in side th e boreh oles at every 1.5m inter val.

5.0 RESULTS OF IN VESTIGATIO N :

Soi l for m at ion at t he si te can be general ized as fo l low s:

1. Top f i l led up layer 1 to 2m th ick

2. Very weak c lay 6 to 11m th ick wi th N va lues betw een 0 and 3

3. Reddish gray si l ty sand w ith gravel 2m thick w ith N value 7

4. W hit ish green com ple te ly weathered rock 3 to 6m th ick N va lues 4 to 12

5. Yel lowish m odera te ly to h igh ly w eathered rock at 11 .5 to 16m depth , N > 100.

6. Hard rock met a t 20m at BH1 locat ion .

Depth o f hard s t ra ta (N > 100):

BH No Depth (m)

1 16.0

2 11.5

3 13.0

4 14.5

5 16.0


5/12

6.0 AN ALYSIS O F RESU LTS

6.1 Bearing capacity for shallow foun dation s

Soil strata at t he si te comp rised of h ighly com pressible soft c lay at the t op. This layer w as 6

to 11m thick. Due to th e presence of t h is weak soi l , shal low foun dat ion s are not suitable for

heavi ly loaded structures as th is wi l l induce large sett lement. For l ight ly loaded structures,

iso la ted foundat ions can be adopted a f te r im prov ing ground by pr ov id ing we l l compacted

boulder packed with sand 0.5m thick below foot ings. Bearing capacity 5T/m 2 shall be

adopted fo r foo t ings less than 2m w ide laid a t 2m dept h on im proved ground.

6.2 Pile founda t ions

Pile foun dat ion s shal l be adopt ed for h eavi ly loaded stru ctures.

As per IS:2911 Part-I Sec 2-2010 , pile lo ad capacity:

Load capacit y Q = cu1 N c + cu2

W here cu1

= shear str ength o f rock below base of p i le

N c = bearing capacity f actor, taken as 9

B = Pi le d iam eter

Fs = Factor o f safety = 3 = 0.9cu2 = average shear strength of rock in socketed length of

pi le.

L = socket length of p i le.

For h ighly w eathered rock, as per cod e, cu1 = cu2 = 600 kN/ m2

Capaci ty o f 500m m d ia p i le socketed 4 t im es its d ia (2m ) in w eathered rock:

Q = 600x9x + 0.9x600x

= 918.9 kN say 90 Ton

0. 52

4x3

B L

4 Fs

B2

4 Fs

x0.5x2

4 x 3


6/12

7 .0 CON CLUSION S AND RECOM M END ATIONS:

1.0 The site w as orig inal ly a wat er logged area which w as recent ly f i l led up .

2.0 Soft compressible clay was present in the top. Thickness of soft c lay varied

f rom 6 to 11m at the var ious boreho le locat ions.

3.0 Due to the presence of soft compressible clay, shal low foundat ions are not

suitable for heavi ly loaded structu res.

4.0 For l igh t ly loaded s t ructures, sha l low foundat ions w i th w id th less than 2m can

be adopted. These foot ings shal l be la id af ter improving ground by laying

packed bou lder sand bed 0 .5m th ick . Ground improvement sha l l be done

at least 0.5m out side the edges of foot ings.

5.0 Bear ing capaci ty recomm ended for sha l low foundat ions la id a t 2m depth and

rest ing on im proved ground is 5 T/ m 2

6.0 Pile foundat ion shal l be adopted for heavi ly loaded structures. Load carrying

capacity of p i les:

Pile dia 450 500 600

Pile capacity (Ton) 70 90 120

The pi les shal l be socketed at least 4 t im es i ts d iam eter in hard strata (N > 100)

or r est ing on h ard rock.

M M anohar RaoM .Tech, M IGS.


7/12

O D C R O A D

BH 2

BH 3

BH 4

BH 1

BH 5

Fig1: Location of Bore ho les


8/12

MManohar Rao16-66 / 4 , Udayanagar Ex tn ; Sr in ivasnaga r Post ; M anga lo re 575014

Ph: 0824 247516 1; 9448117343

ProjectProposed warehouse at

BykampadyB.H No 1

Client N V P Foods, Bykampady Date of boring 21.04.2012

Type of boring Rotary drilling by Calyx machine Ground Water 1.8m

Depth(m)

Profile Field SPT N value Visual Soil Description Remarks

1 Filled soil

21.5 0/0/0 0

3 3.0 0/01 1 Dark soft clay

4

5

4.5 1/1/1 2

6 6.0 1/1/2 3

7

87.5 2/3/4 7 Reddish gray

silty sand with gravel

9 9.0 3/5/8 13

10

Yellowish gray

Medium sandy silt

11

10.5 4/4/9 13

12 12.0 2/2/3 5

13

1413.5 3/3/4 7 Whitish green

fine sandy silt with mica

15 15.0 3/4/7 11

16

16.5 35/RB >100

17

18 18.0 RB >100 Yellowish soft rock

19

19.5

20 Recovery 34%

20.5 Hard rock RQD 13%

21.0


9/12

MManohar Rao

16-66 / 4 , Udayanagar Ex tn ; Sr in ivasnaga r Post ; M anga lo re 575014 Ph: 0824 247516 1; 9448117343


BykampadyB.H No 2



Depth(m)


1 Filled soil

2

1.5 0/0/1 1

3 3.0 1/1/1 2

4

Dark soft clay

5

4.5 1/1/2 3

6 6.0 1/1/2 3

7

8

7.5 1/3/4 7 Reddish gray

silty sand with gravel

9 9.0 3/3/5 8

10 Whitish green

11

10.5 3/4/7 11 fine sandy silt with mica

12 12.0 28/RB >100

13

14

13.5 RB >100 Yellowish soft rock

15 15.0

16

17

18

19

20


10/12

MManohar Rao



BykampadyB.H No 3



Depth(m)


1 Filled soil

2

1.5 1/2/3 5

3 3.0 0/0/1 1

4 Dark soft clay

5

4.5 0/0/2 2

6 6.0 1/1/2 3

7

8

7.5 4/5/5 10

9 9.0 5/6/6 12

10 Whitish green

11

10.5 2/3/7 10 fine sandy silt with mica

12 12.0 2/4/7 11

13

14

13.5 7/19/20 39

15

12/22/RB >100 Yellowish soft rock

15.0

16

16.5

17

1818.0

19

20


11/12

MManohar Rao



BykampadyB.H No 4



Depth(m)


1 Filled soil

2

1.5 2/1/1 2

3 3.0 1/1/1 2

4

5

4.5 0/0/0 0

6

Dark soft clay

6.0 0/0/0 0

7

8

7.5 0/0/1 1

9 9.0 3/3/4 7

10

11

10.5 2/3/3 6

Yellowish gray

12

medium sandy silt

12.0 2/2/2 4

13

14

13.5 2/2/2 4

15 15.0 17/13/RB >100

16

16.5 28/RB >100

17 Yellowish brown

soft rock

1818.0 24/RB >100

19 19.0

20 20.0 RB >100


12/12

MManohar Rao



BykampadyB.H No 5



Depth(m)


1 Filled soil

21.5 0/0/0 0

3 3.0 0/0/0 0

4

5

4.5 0/0/0 0

6 6.0 0/0/0 0 Dark soft clay

7

8

7.5 0/0/1 1

9 9.0 0/0/1 1

10

11

10.5 0/1/1 2

12 12.0 7/8/10 18

13

Pinkish gray

medium sandy silt

14

13.5 8/8/9 17 with angular gravel

15 15.0 8/10/10 20 Brownish

medium silty sand

16

16.5 14/RB >100

17

18 18.0 RB >100 Yellowish soft rock

19

20

Documents

Report NVP Foods-Bykampady