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LOINOIDAU Trong nhltng ndm gdn dAy da c6 m6t s6'sach ue Co hoc dflt ud Ndn mong dtoc xuat ban Trong nhltng sdch d6, cac th[ nghi€m hi€n ffting thtdng dtoc trinh bay hodc ld m6t chrtci,,gngd,n.,lzodcla rai rac ii cac phtin cdn xng dUrg.Voi nhltng cu6n sach,co chi d0,chung do, dung ltQng ctic d0 muc ldm cho ui6c trinh bay cac thi nghi\m hi€n trxing kho co thd ki cang, day du Cbn thxc hanh, theo ccim nhdn cia chrtng fii, nhi6u kit sx, cd, nh[tng ngtiti lam khdo sat ud nhttng ngtrctiphdn ttch thiAl kA',chta chrt bong nhi\u d€n thl nghi|m hi€n tning Cu6n sach Thi nghiim ddi hi|n tuing vd nrg dung phdn tich na'nmdng trinh bdy chuy/n u0 tht nghiAm dit hiln txdng Tuy udy khtii "th{ niAm nghi|m hiAn tuxirng" rdt r6ng ua phon.g phi, n|n day ching toi chl trinh bdy ky hon u€ nhttng tht ngh.iAmdxctc dilng pttd Urcn nhd't Mdt s6'khia canh chuy1n sd,uchta duoc d0 cqp dAn nht cach xdc dinh nd.ng ltong hltu ich cila SPT dxa uao thiAt bi SPTPC, crich chua'n hori thiet bi ECPT, hay cach ti|n hanh thf nghi\m fi€u tan dp lqc nxoc 16r6ng ct)a CPTU (piezocone) Ching t6i danh phdn chn ! dang k0 cho uidc dilng cdc k€| qud thf nghi€m hiAn fixdng phdn tlch n€n mong Trong sach da gi6i thiAu rdt nhiOu cric txdng quan thtc nghiAm cia nhiAu ffic giit ud hr nhi€u nguon khcic Chrtng tei nghl rdng, nAu cdn ct ud,ocdc dd,ctrxng ugttly, co st phdn loai dat thfch hop thi cung co thd dt"tng kinh nghi€m cua nhttng ngxoi nghiAn ctu khdc Ngtoi phdn tich co thd dilng nhi€u cach.diAn dich mit k\t qud chd.ckh6ng hodn todn trilng nhau, nhxng no cho ph6p ta chon lxa gia tri hop ly cho dd.cirtlng cila ddt md ta mu6n danh giri Tril thr nghi€m xuy€n ti€u chudn, cdc th[ nghiAm kh.dc thxdng la rat it clilng, thdm chi hod,n tod.n chta dxoc dilng d nxoc ta Nhxng ViAt Nam ta nhat dinh phai phtit tridr cac thi nghi€m dat hi€n trting Hy ugng sach nd,yse gdy dtoc stt chi y noi nhttng ngtdi khao sdt xdy dttng, nhltng ngxdi trJ udn thiAt kA'xdy dtng ua nhtng ngxoi qud,n Iy xay d,/ng Mdc dil ngxdi uiAi dd hAt st?cc6'giing quti trith biAn soan, nhung nhftng hidu biei cdn han ch€'ud kinh nghiAm thi [t 6i, n\n chd.cchd:n cu6n sdch ndy cbn nhiAu thi€u sot Ching tbi rdt mong nhdn dttoc srt gop y cua d6c giri Crict6c giri vA r/NGDUNG TRoNGPHANT[cHNENMONG THfNGHTeM oAr H|ENTRUdNG MUCLUC L o tN O O t AU M U CL U C K YH | E U 13 14 NH U O N G DUNG c A c T H UN G U Y E T CHIJONG7 TOMTAT XI TT THUCDlA KV THUATCO BAN 11 1.1.cACriNs cnAr co Lv 17 1T i n hc h t ' tv a tl i .18 2T f n hn nh i n I 1D Ol f n c o k e t t h a md n d i n h 19 I 2D h i n c d k d t t h d mt h e ot h d i g i a n 22 3D h i n t r l ct h d i 22 4D d l f n t i t b i d n 23 5H s d n d n 23 3H e s d p l u c n g a n gt l n h K 24 4S r i cc h d n gc i t c r i ad d t 24 1S r i cc h d n gc i t c i r ad d t s t 24 25 1.I.4.2.Srlcch6ng c6t cia ddtc6t 1.1.5.Ty sd fng suAtchu trinh (khdngchdn) 25 1.2.TI-IONG QUANGrIIACACrixU CnAr COLY CUADAr .26 1.2.1.Tuongquangifrachi sd d6o PI vdi srlckh6ngcit S" 26 1.2.2.Tuongquanv6i tinh bidn dangcriaddt 27 1.2.2.1.TucrngquangifrahOsd Poisson(n&hdng)vd q, PI l.2.2.2.M6dunkhOngtho6tnudcciras6t 3C h i s d n n .27 27 .: ,, 1.2.3.H0 sd 6p lgc ngangtlnh Ko vI h0 sd qu6 cd kdt OCR 28 .28 MUCLUC 1H s o q u i i c d k e t O C R c i r ac i i t 29 1.2.3.2 H€ sd 6p luc ngangtinh K v) h€ sd qu6 co ket OCR ciraddt s6t .30 32 3N h i n x t v d g i t r i K 4S f r ck h d n ec a tc i r ad a t -.' " - 33 "" ' 33 , ci{t dat 9cua $ftmnMttron6 1.1,1,1' xuYENCoN (CPT) 2' THiNGHIEM }H;JONG 1G I o l r H I EU - N g u yl i€ "n" " " " " ' z.r.L-Lich su CPT -"'-" 2.2 r'ror DUN(; """""""""' 41 """"""""41 """"""""'41 -.- 45 THi Nair-rr Frw cer 2.2.1.Cic thd.nhphdncia thiel bi 2.2.2C h o nd d s A um d x u y nc t h dl d m v i c 45 45 2.2.3.Thf nghi€mxuyon c6n bangco hoc (MCpr - Mechanicalcone P e n e t r a t i oTne s t ) 46 2.2.4.Thf nghi€mxuy6n c6n bangdi€n ECPT (ElectricCone P e n e t r a t i oTne s t ) 47 2.2.4.1.F,6ohoi vdngdd thdmtrongCW\J 2.2.4.2.Hi€u chinh srlckh6ngmfri rrongCPTU 49 50 C h u d nh o i {s d d e c 51 2.2.6.So si{nhMCPT vd ECpT .52 2.3.UOC rfNH cAc crri rreu Co LV CUADATDUATREN KET QUA CPT 2.3.1.C6ctinh chdtvat lf dua tr6nket qui CpT 1P h A nl o a i d d td u at r O nk d t q u i C p T 2.3.1.2.Dr4nhgi6 trangth6i ciradat dua trOnkdt qui CpT 2.3.2.Dr{nhgi6 tinh thamciraddt dua tr6nkdt quACpT .54 .54 54 5g 61 2.3.3.D6nh gizitinh bidn dangcfraddt dua rronkdt qui cpr 61 MUCLUC 1H s d q u i l c o k e t O C Rc f r ac i i t 29 | 2.3.2.H€ sd 6p luc ngangtrnhK" vI h€ sd quii cd kdt OCR c[radat s6t .30 3N h A nx t v d g i r it r i K 32 4S i c k h d n gc i t c f r ad d t 33 1.2.4.1.G6c ma s6ttrong