6585845004

Bułgaria 23

Bułgaria 23

Tabłe 4

Number of strokes for pen tratlon of the standard oolumn - 10 om			e- Consl8teno: indez *0
Olayey a and	Bandy olay	Olay
<4 4-    5 5-    6 6- 10 >10	<7 7-    8 8- 10 10-16 >16	<3 3- 5 5- 7 7-14 >14	0<=I0<0,2J 0,255: Ia<0,5( 0,50^ Ie< 0,7! 0,75$ Ig d

Tabłe 5

Number of strokes for	Belatiye
penetration of the	density
standard oolumn - 10 om
<10	0^Id<1/3
10-25	1/35 ID< 2/3
>25	2/3«cId<1

4*Interpretation and eyaluation o f the r e s u 1 t 8

Offloial lnstruotiona ara issued in Bułgaria for determinlng the soli properties by tests with statio and dynami o penetrometer*

The lnstruotiona ara valid for determinlng the oonaistenoe₉ the ralatlya density, the angle of internal friotion, the modulus of conrpreesibility and the moduł-us of generał aeformation. In the dynamie penetration for a depth z > 6, a oorrelation la madę and the number of the rammer strokes for penetration of 10 om, ia reduoed by 15 par cent* 4*1* Statie penetration test

When the test ia oarried out with statie penetrometer the oonsiatence of the oo-herent soiła is determined with the aid of Tabłe 2₉ depending on the tip resiat-anoe 0^ _d and the Density indez of non-

Tabłe 2

Tip re8i8tanoe ^ kg/om^2	Conaistenoy indez *0
5	<0 0 - 0f25
5-10	0,25 - 0,50
0 1 •a VJ1	0,50 - 0,75
15-30	0,75 - 1,00
30-60	-
60	>1
ooherent soiła - with the	aid of Tabłe 3*
Table 3
Tip resistanoe ^ kg/cm^2	Density indez *D
<45	0 - 1/3
45 - 110	1/3 - 2/3
>110	2/3 - 1

The angle of the interział friotion ia determined with the aid of the nomogram ahown on Fig* 5 worked out on the basie of the wełł known diagram of E.E.de Baer depending on the tip reaiatanoe _d in kp/om ₉ the depth of testing z in i, meaaured from the surfaoe of the gro and and the ayerage unitę welght f ot the soil layars 0^

The modulus of oompressibllity K in kg/osr which oorresponda to the modułua deterained in lo do me ter, ia determined with relatlozuto the tip re ais tance 0_V A in kp/omr

B-1,6 0_kjd-8    (1)

and the modulus of generał Information K_q whioh oorresponda to the modułua determined by me ans of łoading frame with a cross section 5000 onr

^Eo = ⁴ °k,d -    <²)

4*2* Dynamie penetration test

When testa are oarried out with dynamie penetrometer - light typa the eonaist-enoe ia determined with the aid of Tabłe 4 and the relative density - with Tabłe 5*

The angle of the internal friotion ia determined depending on the number of strokes on the anyll for penetration of the standard oolumn 10 om -    the

soił typa, the depth of penetration Z ln meters and the ayerage unitę welght y in p/cm^ of the soil layers oyer the plaoe of the reading N_1Q with the aid

of the no mo gram on Fig* 5, or the number of the strokes la conyerted in ad-yanoe into tip reaiatanoe 0^ _d with the aid of the formulae fort

- grayel sand	°k,d ^=	5R,o + 10	(3)
- 8 and	°lc,d ^B	^W10 ^+ 7	W
- olayey sand	°k,d ^=	4,2H1q - 10	(5)
- sandy olay	°k,d ^=	2,7H10 - 12	(S)
- olay	°)C,d =	2,4k10 - a	(7)

The modulus of compresslbillty K in kp/om ia determined with relation to