THAI BINH THERMAL POWER PLANT AND TRANSMISSION LINES CONSTRUCTION PROJECT

ORIGINAL DATA USED FOR SURVEY- Horizontal control points: Third order horizontal control points in VN2000 coordinate system established by Vietnam National Land Administration Department

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THAI BINH THERMAL POWER PLANT AND TRANSMISSION LINES

CONSTRUCTION PROJECT

Report on Establishment of the Permanent and Temporary Benchmark

Carried out by: Port Technology Construction Consulting and Commercial JSC(PTECH)

I THE PURPOSE OF SURVEY

In order to obtain the data for the Permanent and Temporary Benchmarks in coordinates and elevations for excecute construction, survey work is required PTECH is assigned to carry out the survey of IV order and Grade 1 traverse control network at the project site from 19th November to 03rd December 2014

II BASIC FOR SURVEY

- Contract dated 7nd March, 2014 between TOA CORPORATION and Port Technology Construction Consulting & Commercial JSC of “Thai Binh Thermal Power Plant and Transmission Lines Construction Project”

- Working statement for Establishment of the Permanent and Temporary Benchmark prepared by PTECH approved

III STANDARD FOR SURVEY.

- QCVN 04:2009/BTNMT - National technical regulation on establishment of Horizontal control network issued by Ministry of Natural Research and Environment in 2009

- QCVN 11: 2008/BTNMT - National technical regulation on eshtablisment of leveling network issued by Ministry of Natural Research and Environment in 2008

- TCVN 9401_2012 - The technical of measuring and processing GPS data in engineering survey

- TCVN 9398: 2012 – Surveying in construction – General Requirements

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IV ORIGINAL DATA USED FOR SURVEY

- Horizontal control points: Third order horizontal control points in VN2000

coordinate system established by Vietnam National Land Administration Department are used for developing the IV order GPS horizontal control network

- Vertical control points: Third order Benchmark is used for development of IV

order vertical control network

- The table below list the original control points used as based points to develop the IV order Hor/Vertical control network (Detail see in Appendix 1)

Table 1: Table of Original Coordinate, Elevation control points

VN2000 coordinate system, Central Meridian 105 0 00’ , zone 6 0 ,

National Land Survey Datum

No.

coordinate point

Benchmark

V QUANTITY OF SURVEY

4 Establishment of Grade 1 traverse

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VI SURVEY EQUIPMENTS

The survey work are used Equipment as following:

1 04 Trimble 4600LS receivers made in USA which can receive the signals

from GPS (USA) systems were used to establish the IV order horizontal control network and the Grade 1 traverse points (area outside the fence)

The Accuracy in standard condition is as follows:

± (5mm + 0.5ppm x D) (Static and Fast Static Mode) (D is the distance from reference station to mobile station)

GPS Trimble 4600LS receiver

2 Total station Nikkon DTM551 made in Japan was used for measuring grade

1 traverse control network (area inside the fence) and setting out

The Accuracy in standard condition is as follows:

• Angle measurement accuracy 1”;

• Distance measurement accuracy 2mm + 2pmm;

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Total station Nikon DTM 551

3 Leveling equipment Topcon AT-B4 and staffs was used for establishing the

IV order vertical control network

Leveling equipment Topcon AT-B4

4 Equipment and softwares for office data processing

• Trimble Business Centre Software was used for baselines processing and adjustment of IV order horizontal control and grade 1 traverse control network (area outside the fence)

• Hhmaps Software was used for network adjustment (area inside the fence)

• AENET Software was used for vertical network adjustment

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• Microsoft office and assistance drawing software such as AutoCAD, softdesk was used for editing and making the report

VII SURVEY METHODOLOGIES

VII.1 Coordinate and Elevation system

• Coordinate system:

National coordinate system VN2000, with Central Meridian 105030’, zone 30

(Ko=0.9999) was used for whole project The detailed parameters of coordinate system are as follows:

Spheroid

Semi major axis

1/ flattening

Projection

Central Meridian

False Easting

False Northing

Scale factor at C.M

: WGS 84 : 6378137m : 298.257223563 : UTM

: 1050 30' E : 500 km : 0.000 : 0.9999

• Elevation system:

National Land Survey Datum

VII.2 IV order horizontal control network.

Horizontal control points:

Third order horizontal control two points named III-130420 and III-130419 in VN2000 coordinate system established by Vietnam National Land Administration Department were used for establishment the IV order GPS control network points

Field survey

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Horizontal control network was connected to at 02 National control points

(III-130420 and III-130419 )

IV order horizontal control network was carried out include 04 sessions Each session, the signal of satellites was recored for at least 120 minutes

All survey information of each measured point such as weather condition, Antenna’s height, number of satellite were recorded into daily report… All data collected at each point were recorded into memory card or internal memory with

10 seconds interval separately by names for post-processing

Network adjustment

Trimble Business Centre software was used for baselines processing and network adjustment

Adjustment module was used for control network adjustment In order to reduce an affect of scale factor and according to technical specification, the network was adjusted in VN-2000 coordinate system central meridian 105030’, zone 30(Ko=0.9999)

Weighting value of all GPS solution is calculated based on “alternative” method After calculating, received result of root means square of weighting unit error is 1.0 and tested result of χ2 with α=95% is PASS All adjustment results are shown in tables of appendix 2

Coordinate in VN2000 grid coordinate system and WGS84 Geographic coordinate system of control points are shown in Appendix 2

VII.3 Grade 1 traverse horizontal control network.

Grade 1 traverse horizontal control network was connected to IV order GPS control points

By position specific of grade 1 traverse control points, with 05 points outside the fence and 11 points inside the fence (see the attached enclosed in Appendix 3) Therefore, the grade 1 traverse control points were establishment according to two methods: The points the inside the fence was established according to the method Total Station (measuring angles and distances), the points outside the fence was established according to the method measurements GPS

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With 05 points outside the fence:

Field survey:

Based on 02 IV order GPS points (BM-01 and BM-06), Grade 1 traverse control points was established by GPS receivers

Grade 1 traverse horizontal control network was carried out include 03 sessions Each session, the signal of satellites was recorded for at least 90 minutes

All survey information of each measured point such as weather condition, Antenna’s height, number of satellite must be recorded into daily report… All data collected at each point was recorded into internal memory with 10 seconds interval separately by names for post-processing

Trimble Business Centre software was used for baselines processing and network adjustment

Adjustment module was used for control network adjustment In order to reduce

an affect of scale factor and according to technical specification, the network was adjusted in VN-2000 coordinate system central meridian 105030’, zone 30

(Ko=0.9999)

Weighting value of all GPS solution is calculated based on “alternative” method After calculating, received result of root means square of weighting unit error is 1.0 and tested result of χ2 with α=95% is PASS All adjustment results are shown in tables of appendix 3.1

Coordinate in VN2000 grid coordinate system and WGS84 Geographic coordinate system of control points are shown in Appendix 3.1

Transformation coordinate

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The network adjustment results of IV order horizontal control and grade 1 traverse control points (for area outside the fence) are using coordinate system VN2000, Center Meridian 105030' , zone = 30 (UTM projection), at location of project deformed distance is 1/20.000 in this projection It's greater than 1/50.000 (according to TCVN 9398: 2012 Surveying construction-General requirements) therefore need to calculate coordinate transformation after network adjustment

Table 2: Coordinate of IV order control and Grade 1 traverse horizontal control points (for area outside the fence) at Coordinate system: VN 2000,

central Meridian 105 0 30’, k=0.9999.

Coordinate

Remarks

7 TBM-17 2265996.417 610180.289 Grade 1 traverse horizontalcontrol point

8 TBMO-01 2266112.908 610284.056 Grade 1 traverse horizontalcontrol point

11 TBMO-05 2265740.280 610222.565 Grade 1 traverse horizontal

control point

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Above coordinate is transformation to the meridian axis in accordance with the geographical location of the project land (central meridian 105 ° 41 '):

Table 3: Coordinate of IV order control and Grade 1 traverse horizontal control points (for area outside the fence) at Coordinate system: VN 2000,

Central Meridian 105 0 41’, k=0.9999.

No Point name

Coordinate

Remarks

7 TBM-17 2265883.736 591054.065 Grade 1 traverse horizontalcontrol point

10 TBMO-04 2265876.642 590928.053 Grade 1 traverse horizontal

control point

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Transfer of coordinate values from CM=105041’, K=0.9999 to CM=105°30', K=1.000000

To calculate coordinate transformation, was used benchmark named: BM-01 as original point, azimuth side BM-01_BM-02 Result this calculate coordinate transformation is used for construction

Table 4: Coordinate of IV order control and Grade 1 traverse horizontal control points (for area outside the fence) at Coordinate system:

VN 2000, Central Meridian 105 0 30’, k=1.000000.

Coordinate

Remarks

control point

With 11 points inside the fence:

Field survey

Based on 05 IV order GPS points (BM-01, BM-02, BM-03, BM-05 and BM-06), Eleven (11) grade 1 traverse points were established by Total station Nikon DTM551

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The accuracy of measurement was within following limits:

o The Traverse angles were measured in 3 times with Root Mean Square (RMS) Error of better than 3.1”

o The Traverse lines were measured in 3 times with Relative RMS error of better than 1:28.600

Hhmaps software was used for processing and network adjustment

This grade 1 traverse control network is used coordinate of 05 IV order GPS

points (BM-01, BM-02, BM-03, BM-05 and BM-06) in Table.4 of Item VII.3

(after transformation) for calculate adjustment

Result of grade 1 traverse horizontal control network (area insde the fence) is shown in appendix 3.2

VII.4 IV order vertical control network.

Vertical control points:

Third order National Benchmarks established by Vietnam National Land Administration Department were used for Establishment of IV order vertical control network

Field survey:

In accordance with standard of V.N.L.A.D the IV order vertical control network was established by using closed geometry levelling method

The benchmarks location were chosen same as location of IV order horizontal control points and Grade 1 traverse control points

National benchmarks were used as basic control points The IV order levelling route run though all IV order control points and Grade 1 traverse control points based on National benchmarks (III(TD-GL)7 and III(TD-GL)6 with miscloser 9.0mm, less than the allowable miscloser of =±85.48mm (where L is the length of levelling route in kilometre = 18.269km)

Network adjustment:

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The AENET software provided by Geodetic Department of Mining and Geology University was used for adjustment of IV order vertical control network

(Results are shown in appendix 4)

VIII RESULTS:

Table 5: Coordinate and elevation of IV order and Grade 1 traverse control points at

Coordinate system: VN2000, central Meridian 105 0 30’, k=1.000000.

No Point name

Remarks

7 TBM-01 2265876.768 610335.730 4.280 Grade 1 traverse horizontal , IV order vertical point

, IV order vertical point

15 TBM-12A 2265697.446 610661.641 5.171 Grade 1 traverse horizontal , IV order vertical point

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19 TBMO-01 2266112.905 610284.064 4.669 Grade 1 traverse horizontal , IV order vertical point

This is point the same Plant Coordinate

X(East)=0.000,

Y (North)=0.000,

Table 6: Coordinate and elevation of IV order and Grade 1 traverse control

points at Coordinate system: Plant.

No Point name

Remarks

7 TBM-01 521.570 851.453 4.280 Grade 1 traverse horizontal, IV order vertical point

IV order vertical point

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15 TBM-12A 625.224 494.200 5.171 Grade 1 traverse horizontal, IV order vertical point

20 TBMO-03 345.009 924.947 4.725 Grade 1 traverse horizontal, IV order vertical point

22 TBMO-05 345.057 834.964 4.676 Grade 1 traverse horizontal, IV order vertical point

This is point the same Plant Coordinate

X(East)=0.000,

Y (North)=0.000,

Remark: Relative between plant coordinate and VN2000 system:

- Vertical axis symbol N(Y), parallel to the west fence of the TB1 thermal power plant

- South-West corner point of Project is assigned the value: X=0.000 (m); Y=0.000 (m) the same with VN2000 coordinate system Easting = 610568.993 (m); Northing

= 2264905.894 (m)

IX CONCLUSION

Report on Establishment of the Permanent and Temporary Benchmark for Thai Binh Thermal Power Plant and Transmission Lines Construction Project prepared

by PTECH follow Technical Specification and Technical standard Results of Elevation and Coordinate ensure for construction

XI REPORT

The final report are submitted to the client including 08 sets English

The Establishment of the Permanent and Temporary Benchmark report consists of the following:

•Technical report

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