Rapport de TP Génie Civil LIMITES D’ATTERBERG
Réalisé par : Oua!a Ait A"derra#ane Mira Mo#aed $GC$ %roupe & En'adré ar : Mr (ettar alal
Année universitaire 2016/2017
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Rapport de TP
SOMMAIRE Introdu'tion.......... Introdu'tion .................... ..................... ..................... ..................... ...................... ..................... ..................... ..................... ...................... ............ 2 1. Introd Introduct uction ion sur l'essa l'essaii Proc Proctor tor :........... :...................... ..................... ..................... ..........................3 ...............3 2. Bu Butt de l’e l’essai ssai :.................... ............................... ..................... ..................... ..................... ..................... ..................... ................ ...... 3 3. Princ rincip ipe e de de l’e l’ess ssai ai :................................................................................4 :................................................................................4 1. Maté Matéri riel els s uti utili lisé sés s :.......... :.................... ..................... ..................... ..................... ......................................... .............................. 5 2. Mode Mode opér opérat atoi oire re :..................... ............................... ..................... ..................... ......................................... ............................... 7 $* Cal'uls et résultats: ……………………………………………………………………………………………………………. .8 CONCLUION........... CONCLUION ..................... ..................... ..................... ..................... ...................... ........................................... ................................ 12
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Rapport de TP
Introdu'tion Le laboratoir laboratoire e est lun !es "rin#i"au$ "rin#i"au$ a#teurs a#teurs intervenant !ire#te%ent !ans la &ualité !es travau$ !e '(P) en *ouant un r+le tr,s i%"ortant avant) "en!ant et a"r,s le "ro "ro#essus sus !e réalis lisation !es !es "ro "ro*ets) !e" !e"uis uis les étu!e u!es "réalables *us&uau$ essais !e ré#e"tion !es ouvrages. -l !evra "our #ela tre en %esure !e ournir !es "restations !e &ualité an !e ré"on!re au$ attentes !es !onneurs !or!re !evenus !e "lus en "lus e$igeants. La on#tion on#tion !un laboratoir laboratoire) e) !essais !essais ou !an !anal als se) e) est est !e "ro! "ro!ui uirre !es !es résul ésulta tats ts !es !essa sais is.. eu$ eu$# #ii "euvent aussi servir la #on#e"tion !e nouveau$ "ro!uits &u la véri#ation !e la #onor%ité !un "ro!uit !es s"é#i#ations !onnées. ans #es !eu$ #as) il est né#essaire &ue les résultats "ro!ui "ro!uits ts soient soient ables) ables) #est #est!i !ire re ré"ét ré"étable ables s le labora laboratoi toire re ré",te é",te les lessa saii trou trouve ve le %%e %%e résult ésultat at et re"r re"ro! o!u#t u#tibl ible e un un autre laboratoire !e %%e niveau !e &ualité trouve un résultat #o%"arable.
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Rapport de TP
I* Li Liit ites es d’A d’Atte tter"e r"er% r% 1.
Intr In trod oduc uctio tion n su surr li! li!it ites es d’ d’at atte ter" r"er# er# :
Les li%ites !Atterberg !Atterberg sont !es essais &ui "er%ettent !e !énir !es in!i#ateurs &ualiant la "lasti#ité !un sol) et "lus "ré#isé%ent !e "révoir le #o%"orte%ent !es sols "en!ant les o"érations !e terrasse%ent) en "arti#ulier sous la#tion !es variations !e teneur en eau. 9otons &ue #et essai se ait uni&ue%ent sur les élé%ents ns !u sol et il #onsiste aire varier la teneur en eau !e lélé%ent en observant sa #onsistan#e) #e &ui "er%et !e aire une #lassi#ation !u sol.
2.
Butt de l’ Bu l’es essa sai i ::
Le but !e #es tests est !e !éter%iner les li%ites !e #onsistan#e &ui sont e$"ri%ées en ter%es !e teneur en eau %ar&uant les li%ites entre état soli!e) "lasti&ue) et li&ui!e. -l est i%"ortant !e noter &ue #es tests ne sa""li&uent &ue "our les sol sols ns) ns) !énis #o% #o%%e aant !es !es grains !e !ia%,tr ,tres inérieurs 0.06 %%;.
3.
Princip Prin cipe e de l’ l’ess essai ai ::
Détermination de la limite de liquidité : Pour #e) on utilise la coupole de Casagrande) Casagrande) &ui #onsiste en un a""areillage #o%"osé !un bol et !un arbre #a%e "er%ettant !e tran transo sor% r%er er le %ouv %ouve%e e%ent nt !e rotat otatio ion n en tran transla slati tion) on) on
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Rapport de TP
arri arrive ve !on# !on# élev élever er le bol bol !un !une e #ert #ertai aine ne
• • •
•
•
•
=u%i!ier lé#taler lé#
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Rapport de TP
Détermination de la limite de plasticité Pour !éter%iner #ette li%ite) le "ro#é!é est le suivant : • • •
•
•
Pren!re un é#
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Rapport de TP
Liites de li+uidité Matériel : ▪
▪
▪
a""areil !e asa gran!e et #+ne !e "énétration outil rainurer #ale !é"aisseur 10 %%
Divers : ▪
▪
étuve. balan#e.
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Rapport de TP
-
!ébuter lessai !e li%ite !e li&ui!ité. @e#
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Rapport de TP
▪
▪
▪
"la&ue !e %arbre. %arbre. s,#
Divers : ▪
▪
▪
▪
▪
étuve. balan#e. s"atule. "issette. #
Mode Mo de op opér érat atoi oire re :
-
-
Sé'#er le sol en le %ala$ant sur le %arbre et en létalant. Bor%er une "oulette ave# une "artie !e lé#Je#tue? une %esure !e teneur en eau.
$ésultats:
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Rapport de TP
,o"re de 'oups Masse -uide .%/ Masse sé'#e .%/ Teneur en eau
11
17
27
38
6)3
2)O
3)3
5)2
4)8
2)2
2)54
4)06
32)82
31)13
2O)3
28)6
Masse -uide .%/ Masse sé'#e .%/ Teneur en eau
5)8O 5)04 16)84
5)O4 5)12 16)01
'/ Coentaires Ee basant sur les résultats notés !ans le tableau) la li%ite !e "last "lasti#i i#ité té t<éo t<éori ri&ue &ue sobt sobtien ientt "ar "ar #al#ul #al#ul !e la %oe %oenn nne e !es
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Rapport de TP
en eau eau si le sill sillon on sét sétai aitt reer eer%é %é e$a#t $a#te% e%en entt 25 #ou" #ou"s s gra"
40
38
35 30
27
25
9o%bre !e #ou"s
20
17
15
11
10 5 0 28
2O
30
31
32
33
(eneu eneurr en en eau eau
Ainsi "our 25 #ou"s) on a lQ 30.17R;. #e ait on "eut #al#uler lin!i#e !e "lasti#ité -"Q l e"Q 13.6O R;.
34
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Rapport de TP
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Rapport de TP
9ous "ouvons #on#lure &ue les sols #o<érents sols ns "assent !un état !e #onsistan#e un autre !e %ani,re "rogressive en *ouant sur la teneur en eau. Plus la teneur en eau est gran!e) "lus le no%bre !e #ou"s #