Cau Dien Thuy Km421+927

8/6/2019 Cau Dien Thuy Km421+927

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TNG CNG TY XY DNG CNG TRNH GIAO THNG 4.CNG TY C phn T VN 497

a Ch : 72 Nguyn S Sch - TP Vinh - Ngh Anin Thoi: 038.832716 fAX 038.832721

S: ....................../TV497/SA-MB

project:Transport Sector Loan for National Road Networkimprovement ( phase 1 )

REPORT On ultraSONIC TESTINGFOR BORED PILE

Engineering: dien thuy bridge.(km 421+ 927 national highway no.1a).

ITEM: - piers t1 - pile: c1,c2

Vinh city november, 2010


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S: ....................../TV497/SA-MB

D ntn dng ngnh GTVT ci to mng li ngquc gia (giai on 1 )

bo co kt qu th nghim

siu m cc khoan nhicng trnh : CU din thy (km 421 + 927 QuC L

1a).Hng mc : - tr t1 cc (c1,c2)

vinh,Thng 11 Nm 2010

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S: ....................../TV497/SA-MB

project:Transport Sector Loan for National Road Networkimprovement ( phase 1 )

REPORT On ultraSONIC TESTING

FOR BORED PILE

Engineering: dien thuy bridge.(km 421+ 927 national highway no.1a).

ITEM: - piers t1 - pile: c1,c2

pmu: Consultant:

Executors :

phan dinh vuongContractor:Transport Works Company 473 Tecco 497

Vinh city november, 2010

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S: ....................../TV497/SA-MB

D ntn dng ngnh GTVT ci to mng li ngquc gia (giai on 1 )

bo co kt qu th nghim

siu m cc khoan nhi

cng trnh : CU din thy (km 421 + 927 QuCL 1a).

Hng mc : - tr t1 cc (c1,c2)

Ban qun l d n: T vn gim st:

NGI thc hin:

n v thi cng: Cng ty cng trnh giao thng 473 cng ty c phn t vn 497

Vinh, Thng 11 Nm 2010

I. general introduction

Dien thuy bridge is at station km 421+927 of National HighwayNo.1A. According to quality management programs, all boredpiles must be tested and valued the quality by ultrasonic method.

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I.Gii thiu chung.Cu Din thy Km 421+927 nm trn Quc l 1A.Theo chng trnh qun l cht lng, cc cc khoan nhi cn

c kim tra, nh gi cht lng bng phng php siu m.II. Principle of Method

II. Nguyn l ca ph ng php.

2.1 Purpose:Ultrasonic testing method is to value quality of pile material

along pile shaft, based on the speed of ultrasonic wave propagationthrough the pile material.

2.1 Mc ch:Phng php siu m s dng sng m nh gi cht lngca vt liu cc dc theo thn cc thng qua c imtruyn sng siu m qua vt liu cc theo sut chiu di thncc.

2.2 Principle of method:Ultrasonic testing method is used to determine the integrity of

piles based on the features during propagating ultrasonic-wave inconcrete material. In sane and undamaged structure, the ultrasonicwave speed is the more bigger (the range of 3000-6000m/s)depending on the component of aggregate and concrete placementquality.

In the ultrasonic testing, ultrasonic receiver and transmitterprobes is initially lowered (at the same level along pile length) to

the bottom of pair of access tubes that must be installed to thecage prior to the concrete placement.

The time for propagating wave through pile material between2 probes is measured by its amplitude during pulling up probes inparallel from bottom to top of tube. The propagation speed ofultrasonic wave through the pile section along the pile length isdetermined when the distance between 2 probes was known (it isdistance between 2 access tubes).

The tubes may be by steel or PVC with suitable diameter to

probes. Quantity of tube pair is to determine quantity of whichsection is in need of test depending on pile dimension. In general,quantity of which tube is in need of installation is from 3 to 10 withpile diameter of 800-2000mm. Tubes must be installed with equaldistance. The quality of the pile concrete will be evaluated based onthe speed of sonic wave propagation.

2.2 Nguyn tc ca ph ng php:Phng php siu m xc nh tnh ton khi ca cc da trn

c im ca qu trnh truyn sng siu m trong vt liu. Vt

liu c cu to cng c chc, tc lan truyn ca sng sium cng ln (Khong 3000-6000 m/s) ph thuc vo thnh phncp phi ca ct liu v cht lng b tng ca cc.

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Trong kim tra cht lng cc khoan nhi bng phng php siu msng pht v thu b tr bi 2 u d (mt u pht v mt uthu sng siu m) c th song song lun cng cao sut chiudi cc theo cc ng t sn dc thn cc trc khi b tng to cc. Thi gian truyn sng qua vt liu cc gia 2u d c o bin trong qu trnh ko u d song song t

y ng ln nh ng. Tc truyn sng siu m qua tit dincc theo chiu di cc c xc nh khi bit khong cch gia 2u d (chnh xc l khong cch gia 2 ng sonic c t sntrc lc cc).

ng th u d c th bng thp hay nha c ng knhthch hp vi u d. S lng ng cn t tng cp xc nh s l-

ng mt ct cn o trn tit din cc, tu thuc vo kch thccc.Thng thng s lng ng cn t t 3 n 10 vi ng knhcc t 800-2000 mm. Cc ng phi t c khong cch u nhau

trn tit din cc. Da vo tr s vn tc truyn sng siu m kt lun cht lng b tng to cc.

Figure 1: Action diagram of ultrasonic testequipment.

Hnh 1: S hot ng ca thit bkim tra siu m.\

2.3. Method of CSL2:With this method, 2 receiver and probes and 1 transmitter

probe (transmitting probe will transmit ultrasonic wave to 2receiving probes) is lowered in parallel with the same elevationalong the length of pile in 3 tubes which is installed prior to theconcrete placement.

6

Equipmentfor

measuringthe depth

Screen

Transmittingprobe Receiving

probe

Pile concrete


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The time for transmitting ultrasonic wave through pile materialbetween transmitting probe and 2 receiver probes is measuredcontinuously during pulling up probes in parallel from bottom totop of tube. The propagation speed of ultrasonic wave through thepile section along the pile length is determined when the distancebetween 2 probes was known (it is distance from transmitter

probe to receiver probe No.1 and from transmitter probe to receiverprobe No.2). This method indicates 2 sections per 1 measuringtimes.

The second method using 1 transmitter probe and 1 receiverprobe, 1 measuring times indicates 1 section or to be named as themethod CSL1.

2.3.Nguyn l ph ng php CSl2:- Phng php ny s dng hai u thu v 1 u pht sng sium (u pht s pht sng siu m ti 2 u thu) c th songsong lun cng cao sut chiu di cc theo 3 ngt sn dcthn cc trc khi b tng to cc. Thi gian truyn sng quavt liu cc gia u pht v 2 u thu c o lin tc trong qutrnh ko 3 u d song song t y ng ln nh ng. Tc truyn sng siu m qua tit din cc theo chiu di cc c xcnh khi bit khong cch gia 3 u d (chnh l khong cch

gia u pht ti u thu 1 v gia u pht ti u thu 2 thtrong 3 ng sonic). Phng php ny th hin 2 mt ct trn 1 lno.

- Phng php th 2 s dng 1 u pht v 1 u thu, mt lno thu c 1 mt ct hay cn gi l phng php CSL1.

2.4. Method of 3D:This method is preeminent method of CSL2 machine.After fulfilling check by CSL, it finds out the damage at any

part, in order to see clearly mistake or defects to useTOMOGRAPHY program.2.4. Ph ng php 3D:

Phng php ny l phng php u vit ca my CSL2.Sau khi thc hin php kim tra bng CSL xong ta pht hin ra li khong no o trong cc v mun nhn r cc li cng nhkhuyt tt ta dng chng trnh TOMOGRAPHY .

* Process for testing:

* Cc bc tin hnh th nghim:

Step 1: After finding out the defect at specific depth, to lowerdown receiver and transmitter probes deeper 1m comparing withdefect position and to turn on measurement mode.

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B c 1: Sau khi pht hin khuyt tt su no ta thu thu v u pht xung di khuyt tt khong 1m v bt ch o.

Step 2: And then to pull up receiver probe with a space whichis placed at step 1 and to lower transmitter probe down to bottomand to record data. It starts the test at the next depth . It continue

the test to the end of the depth and to record all data.B c 2: Sau ko u thu ln mt khong m ta t

bc 1 v th u pht ti y sau ghi li. Bt u php th su tip theo. C lm th cho n khi ht su nhp banu v ghi ct cc d liu.

Step 3: After completion of tests at all the depth, it gets dataof 1 section, it continue to get data of next sections until the lastsection.

B c 3: Khi thc hin xong cc su ta thu c cc s liu

ca mt mt ct, ta tip tc thu cc mt ct tip theo cho nkhi thc hin ht cc mt ct.Step 4: It gets all data and to set up 3 D figure.

B c 4:Thu xong s liu v dng thnh hnh nh 3 chiu.

III. Equipment including:Ultrasonic equipment CSL2 is made in USA by OLSON Firm in 2006(Figure 2).

* Equipment with main following parts:- Set of Pentium 1.1 GHz, display screen with pixels 1024x768.- Probes (receiver and transmitter) are connected with

measuring cable unto the depth of 100m.- The Unit for measuring move speed of probes.- The Unit for measuring, recording and saving data.- The data processing software CSL2.- Softwares for processing data of TOMOGRAPHY program to

check pile quality by 3D: Tomo ....- The printer.

III. Thit b th nghim:Thit b siu m CSL2 do hng Olson ca M sn xut nm 2006(Hnh 2).

*Thit b gm cc b phn chnh sau:

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- B vi x l Pentium 1.1Ghz, mn hnh hin th c phn gii 1024x768.

- Cc u d (u thu v u pht) ni vi cp o chiusu ln n 100 m.

- B phn o tc dch chuyn ca u d.- B phn o, ghi, lu tr s liu.

- Phn mm x l s liu CSl2.- Cc phn mm s dng x l s liu ca phng php

TOMOGRAPHY kim tra cht lng cc bng 3D: Tomo- My in.

Figure 2: Introduction of ultrasonic machine CSL2 - OLSON. Hnh 2: Gii thiu v my siu m CSL2 OLSON.

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I H Ni

I Vinh

*The ability of measurement equipment:- Set of Pentium permit to control measuring process, to save,

transfer and display directly (if necessary ) all measure data.- The tested depth reach to 100m with concrete thickness of

2.5m.- To check defect of pile shaft by measurement of 3D. *Kh nng ca my o:

- B vi x l cho php iu khin tin trnh o, lu gi,chuyn i v hin th trc tip (nu cn) s liu o.

- su kim tra ti 100 m vi b dy b tng ti 2.5m.- Kim tra khuyt tt thn cc bng php o khng gian 3

chiu.

IV. The order of test step:IV. Trnh t cc b c tin hnh th nghim:4.1. Prepare:In order to prepare for test work sonic tubes have to be full of

water and then to wash and clean tubes, ... 4.1 Chun b:

chun b cho cng tc th nghim trc ht cc ng sium phi c y nc, thi ra sch cc ng, ...

4.2. Characteristic of tested pile:Tested piles are shown on diagram as follows: (Figure 3)

4.2 c im cc th nghim:Cc cc c th nghim th hin trn s b tr cc nh

sau (Hnh 3)

Figure 3: Diagram of tested pile position. Hnh 3: S v tr cc th nghim.

Note: Piles are tested by ultrasonic:Ghi ch:Cc c th nghim siu m :

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Tr T1

i VinhC1C2


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3

2

4

1

Characteristic of tested piles are summarized in followingtable:

c im cc cc th nghim siu m c tm tt trongbng sau:

Table1: Characteristic of tested pile:Bng 1: c im cc th nghim:

No.

(TT)

Pilename

(Tncc)

PileDiamet

er(mm)

(ngknhcc)(mm)

Con.casteddate

(Ngy btngcc)

Quantiy ofsonictube

(Sngsium)

Elevation ofpilebottom

(m)

(Cao y

cc)(m)

Pilecuttingpositi

onelev.(m)

(Caoctucc)(m)

Tubetop

elev.(m)

(Cao

nhng

sonic)(m)

Distancefromtube topto pile

topcuttingposition(m)(Khongcch tnhngsonicn v

tr ctucc)(m)

1 T1-C1 150026/ 10 /

201004 - 48.052

+1.948

2.4480.5

2 T1-C2 150007/ 10 /

201004 - 48.052

+1.948

2.4480.5

- Sonic tubes are located as the beside picture.- Theses sections are in need of testing:

Sections: 1-2, 1-3,1-4,2-3,2-4,3-4.Distance between sonic tubes are following design.+ Dpile = 1500 mm+ Dsteel cage = 1300 mm

- Cc ng sonic c b tr nh sau:- Cc mt ct cn th nghim:

Mt ct: 1-2, 1-3,1-4,2-3,2-4,3-4.Khong cch gia cc ng sonic ly theo thit k.+ Dcc = 1500 mm+ DLngthp = 1300 mm.

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4.3 Process for testing:Step 1: After giving a try by probe through the hole, it to

connect cable with receiver and transmitter probe and then tolower them to the bottom of access tubes.

Step 2: Turn on the machine and to enter measurementprogram. To select CSL1 so that with 1 pulling times to get 1section, or select CSL2 (1 transmitter probe and 2 receiver probes)for getting 2 sections with 1 times of pulling 3 probes.

Step 3: To start the test and record data.To press save button and pulling probe up to the top of tubeand press save button. To such to get result of 1 section for CSL1and 2 sections for CSL2.4.3 Cc bc tin hnh th nghim hin trng:B c 1: Sau khi th bng u ri thng l ta tin hnh ni dy v

u thu pht sau th u thu v u pht xung y ng.B c 2: Bt my v vo chng trnh o: Chn CSL1 sau 1 ln

ko ln th thu c 1 mt ct hoc chn CSL2 (1 u pht v 2 u

thu) thu c 2 mt sau 1 ln ko 3 u d ln.B c 3: Bt u php kim tra v ghi d liu vo my:n vo nt ghi d liu v bt u ko dy ln, c th

ko ln ti nh l v n nt ghi li. Nh vy l thu c 1 mt cti vi CSL1 v 2 mt ct i vi CSL2.

4.4. Testing result:4.4 Kt qu th nghim.

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Figure 4: An ultrasonic wave oftested pile.

Hnh 3: Mt sng siu m.

-Based on the ultrasonic wave speed propagating through pileconcrete or section graph for valuation of pile concrete.

Results from sonic testing is presented following form of wavepropagation speed -depth relation graph or section graph, itindicate features of which concrete area was probed and quality ofconcrete following depth.

- Cn c vo biu vn tc sng siu m truyn qua b

tng cc hoc th mt ct nh gi c cht lng b tngcc.

Cc kt qu o t th nghim siu m c th hin theo dng th quan h su v tc sng truyn hoc th mtct nu ln c trng ca cc vng c chiu d trong cc btng v cht lng ca b tng theo su.

Pile concrete quality: Wave speed (m/s)Very good > 4000Good 3500-4000Medium 3000-3500Bad 2000-3000

Very bad < 2000Cht lng b tng cc: Tc sng (m/s)Rt tt > 4000Tt 3500-4000

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Trung bnh 3000-3500Xu 2000-3000Rt xu < 2000

The decrease of wave speed at some depth of pile shaft:Mc suy gim ca tc truyn sng siu m ti im no

trn thn cc:

Pile concrete quality: Wave speed decrease(%):.

Good 20 %Broken Loss of signal

Cht lng b tng cc: Mc suy gim vn tc(%):

Tt 20 %Hng Mt tn hiu.

Quality of pile concrete is valued as follows:Cht lng ca b tng cc th nghim c nh githeo bng sau:



S: ....................../TV497/SA-MB

kt qu kim tra cht lngcc khoan nhi bng phng php siu

m

cng trnh : CU din thy (km 421 + 927 QuC L1a). Hng mc : - tr t1 cc (c1,c2)

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Pilename

Tncc

Section

Mt

ct

Testdepth(m)Chi

usuthnghim(m)

Testingelev.(m)Cao

thnghim(m)

Concrete quality of each section

Cht lng b tng tng mt ct.

Pileconcre

tequalitynh

gicht l-ng btngtoncc:

T1 c1

1-2 49+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:T cao ct cc(+1.948m) n htchiu su thnghim vn tc TB.

3700 4300m/s

Concretequality

isfrom

average to

good.(Chtlng btngt

trungbnhntt).

1-3 49.01+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:T cao ct cc

(+1.948m) n ht

3400 4600

m/s

1-4 49+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:T cao ct cc(+1.948m) n htchiu su thnghim vn tc TB.

3900 4800m/s

Pilename

Tncc

Section

Mtct

Testdepth(m)Chiusuthnghim(m)

Testingelev.(m)Caothnghim(m)

Concrete quality of eachsection

Cht lng b tng tng mtct.

Pileconcretequality

nhgicht l-ng btngtoncc:

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T1 c1

2-3 49.8+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:T cao ct cc(+1.948m) n ht

chiu su th nghimvn tc TB. 3500 4500m/s

Concrete

qualityis

fromaverag

e togood.(Chtlng btngt

trung

bnhntt).

2-4 49.8+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:T cao ct cc(+1.948m) n ht

3700 4400m/s

3-4 49.8+1.94

8

From elev. of pile topcutting position

(+1.948m) to end oftesting depth withaverage speed:T cao ct cc(+1.948m) n htchiu su th nghimvn tc TB.

3400 4300m/s

T1 c2

1-2 49 +1.948

From elev. of pile topcutting position(+1.948m) to end of

testing depth withaverage speed:T cao ct cc(+1.948m) n htchiu su th nghimvn tc TB.

3700 4300m/s

Concrete

qualityis

fromaverag

e togood.

(Chtlng btngt

trungbnhntt).

1-3 49.01+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:

T cao ct cc(+1.948m) n htchiu su th nghimvn tc TB.

3500 4400m/s

1-4 49+1.94

8


(+1.948m) n htchiu su th nghimvn tc TB.

3900 4900m/s

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Pilename

Tncc

Section

Mtct

Testdepth(m)Chiusuthnghim(m)

Testingelev.(m)Caothnghim(m)

Concrete quality of each section

Cht lng b tng tng mt ct.

Pileconcretequality

nhgicht l-ng btngtoncc:

T1 c2

2-3 49.8

+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth with

average speed:T cao ct cc(+1.948m) n htchiu su th nghimvn tc TB.

3500 4600m/s

Concrete

qualityis

fromaverag

e togood.(Chtlng b

tngttrungbnhntt).

2-4 49.8+1.94

8


(+1.948m) n ht

3800 4600

m/s

3-4 49.8+1.94

8

From elev. of pile topcutting position(+1.948m) to end oftesting depth withaverage speed:T cao ct cc(+1.948m) n htchiu su th nghimvn tc TB.

3700 4600m/s

Remark: - Ultrasonic testing result of piers t1 piles (c1,c2) Dien thuy bridge (km 421 + 927 National highway No.1A)-indicates the concrete quality is from average to good.Nhn xt: - Kt qu siu m: - Tr T1 Cc (C1,C2)- Cu Din thy (Km 421 + 927 Quc l 1A). cht lng b tng

ng nht t t trung bnh n tt.Ghi ch: Trong biu vn tc v tr im 0 c tnh t cao th nghim(m).Note: Speed at position 0 point is calculated from testingelevation (m).

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Ngy 5 thng 11nm2010

November, 5 , 2010Laboratory chief

tecco 497

Tecco 497

Trng phng th nghim cng ty c phn t vn 497

Appendixtesting result

ph lckt qu th nghim

Documents

Cau Dien Thuy Km421+927