施工测量方案英文版

1、1.Rules of planning1.1 The documents and the acceptance regulations & instructions for the quality of building work, which are issued by nation, industry or local government, involved in the construction of civil work are as follows： Regulations of engineering measurement (GB50026-93) Instructio

2、ns of construction measurement in building work (DBJ01-21-95) Instructions of deformation measurement in engineering (JGJ/T8-97) The acceptance regulations for the quality of construction of steel structure (GB50205-2001) The acceptance regulations for the quality of construction of concrete work (G

3、B50204-2002) 1.2 The initial data of level and altitude are based on the points of SWC22 and SWC24 supplied by the owner, i.e. Riyadh Cement Company.The relation converted between the coordinate system of construction and that of measurement is as follows: X=（N-N0）cos+（E-E0）sin+X0 Y=（E-E0）cos-（N-N0）

4、sin+Y0N=（X-X0）cos-（Y-Y0）sin+N0E=（Y-Y0）cos+（X-X0）sin+E0X0=-100.000, Y0=100.000N0=2687000, E0=632800=29.813。The initial data of level and altitude are as followsSWC24：N =2687262.704m E =632412.184m H=847.540m(X =-64.8750m Y =-367.0984m)SWC22: X =2687186.364m Y =632804.400m H=841.689m(A =63.8868m B =11

5、.1629m)1.3 The draws of construction are based on the general layout that is designed by the Sinoma .Ltd2.Description of projectRiyadh Cement Plant 5000t/d Project is invested by Riyadh Cement Company (RCC). Its General Contractor is SINOMA international engineering Co. Ltd., and HOLTEC as a consult

6、ant firm. The site is located at Al Mazahimiyah, about 75km southwest of Riyadh city. And the floor area is rectangular distribution with 1500 meter of length in west east direction and 1100 meter of width in north south direction, level and altitude is between 823 and 850 meter. The stratum layer o

7、n site mainly consists of filled-in layer by manual, natural layer and limestone layer. The types of construction structure mainly include silo, mass concrete foundation, corridor of transportation belt, yard of raw materials and some frames. Due to mass construction area and wide distribution of bu

8、ildings, the measurement scheme is planned to ensure the quality of construction and meet the requirement of progress.3 Construction arrangement 31 Programme of Measurement PreparationMeasurement WorkSelf-checked and Certified by Sub-Contractor Checked and Certified by General Contractor Checked and

9、 Certified by Consultant Engineer Enter the Next Procedure of Construction32 Organization of Construction MeasurementThe group of measurement consists of special measuring personnel (2 surveyors and 2 assistants) in civil work from manager department of project, which fulfills the layout of control

10、network of construction and the engineering allocation according to the coordinate points and control points of altitude supplied by owner, and carries out strictly the check & acceptance work according to the requirement of regulations and programs. The member of group must be informed complete

11、ly the technical details and expressly divided the responsibilities. All of the measuring work must be arranged day-to-day according to the general scheduled plan of project.4、The Fundamental Requirements of Measurement Work 4.1 Principle of Measurement Carry out strictly the regulations of measurem

12、ent. Observe the procedure of work, i.e. first to entirety, then to parts respectively. According to the principle that the entirety controls the parts and high precision controls low precision, the control networks of plane and altitude of plant must be confirmed at first, then various buildings an

13、d frames (including partial axis) should be positioned & laid accordingly. Verified strictly the accuracy of original data of measurement adhered to the layout of measurement and calculation work should be checked synchronously.The allocating work of measurement should be followed the rules, i.e

14、. self-check, mutual check, certified and then submitted for verification.The method of measurement should be simple. The operation of instrument should be skilled. Under the premise to meet the requirement of engineering, it should save the labor, time and cost as possible.Clarified the aim of serv

15、ice for engineering, construction as per drawings and quality is the first, cooperated closely the construction of engineering and developed the style of work, i.e. unity and fraternity, seeking truth from facts and earnest & conscience. 4.2 Preparation workUnderstand completely the intention of

16、 design, be familiar and check conscientiously the drawings.The personnel who is in charge of measurement should understand the distribution and features of project, surrounding conditions and the position & coordinates of buildings and frames through the study of layout and description of desig

17、n; secondly, find out the relation between local coordinates of measurement and buildings, the position and altitude of reference points and the absolute elevation ±0.000 of various buildings & flames. After understanding the layout, learn carefully the construction drawings; check the plai

18、n, stereo and sectional dimensions, shape and structure of buildings and the inter-relation between various buildings in time, which is served as the base for setting-out of project. When going through the drawings, it should emphasize on understanding the interdependence of various buildings in pro

19、cess and the dimension of axis and height of floor of buildings, comparing the dimension of axis among foundation, the surface of floor, buildings and structure, check for the conformation of axis and elevation concerned, whether there is discrepancy or not. Selection of apparatus for measurementAcc

20、ording to the relevant stipulations, the apparatus and steel rules etc. for measurement should be submitted to the competent department with qualification concerned in Guangzhou to carry out the calibration, and which can be put into use only after obtaining the certificates.List of local apparatus

21、for measurementSerial No.NameSpecificationsUnitQuantity 1TheodoliteJ2Piece12Level gaugeS1Piece13Level gaugeDS3Piece24Laser theodoliteJ2-JDPiece15Full-station instrumentGTS-602Piece16Tilt-type single prism combination3.0km/1PSet27Bar of single prism2.15mPiece18interphoneMOTOROLA T5428Piece49Steel rul

22、e50mPiece110Level staff30mPiece111Steel rule5mPiece34.3 The fundamental requirement of measurementThe records of measurement should be original and true, the digits should be correct, the contents should be complete and the character style should be regular; the precision of measurement should meet

23、the requirement of regulations, and the precision should be controlled according to valid regulations and instructions of measurement.According to the features of project and Regulations of engineering measurement, the precision of plain control network of project should be set to class I, and the a

24、ngular error of measurement should be of 5, the relative error of length of side should be of 1/30000.5、The measurement & layout of control network and the allocation of project.5.1The layout of plain control networkAccording to the principle of plain arrangement and layout, we arrange one polyg

25、onal network around plant using TOPCON GTS602 as the first control of plant. The first control network consists of one polygon and two pivots (figure 1), and it is used for leveling and grading work. Secondary control network is planning to lay vertical and horizontal axes at the first product line

26、after leveling and grading work and earth work blasting, and the precision of layout should be set to class I (figure 2). After finishing survey and adjusted calculation, we will submit the detailed coordinates data to you. None plant building, Zone 1, 2 and 3, according to RCC01 & RCC02, laying

27、 one pivot between two points to control the construction.FIGURE25.2 The measurement & layout of altitude control network The layout principle of altitude control networka. Firstly, taking the elevation of SWC24, H=847.540 as reference mark, laying a annular close level net as first control net

28、around plant through leveling method (figure 3), and having observation according to class III leveling. b. Secondly, taking the traverse of first control as reference mark, forming a annular close level net (figure 4),and having observation according to class 4 leveling.FIGURE4 5.3 The technical re

29、quirements of horizontal control grid:The technical requirements of horizontal control grid（table1）Class（mm）Relative Mean Square Error of Range Observation Set Number（DJ2）4th class traverse±2.5181/8000065n1/35000I±5.0151/30000210n1/15000 II±8.0151/14000116n1/10000 note：N is station nu

30、mber. 5.4 Technical Requirements of Vertical Control Net （table2、table3）：Main Technical Requirements Of Leveling table2ClassElevation Error Per km（mm）The Length Of Course（km）Connecting Or Ring Number Return Error, Connecting Or Ring Closing Error（mm）III650Return OnceReturn Once 12/4nIV1016Return Onc

31、eOnce 20/6nNote：L is return survey section, connecting or ring level length(km)，used for plat tolerance; n is survey station number, used for mountainous region. The Technical Requirements of Leveling table3ClassLevel Gauge TypeLength of Line of Sight （M）Difference between fore and after stadium（m）A

32、ccumulated difference between fore and after stadium（m）Minimum height from line of sight to ground（m）Value reading difference of black side and red side of level staff（mm）Height Difference of black side and red side of level staff3rdDS375360.32.03.04thDS31005100.23.05.0 5.5 Two Types of Controlling

33、Points：one is concrete inside imbedded reinforced bar（chart5a）；another is concrete top imbedded steel plate（chart5b）。5.6 Check and Protection of Controlling Points: Controlling points should be checked regularly. In the first two months after first observation, monthly check is required. And after t

34、hat every three months should have a check. When laying out through controlling points, connection survey with other controlling points is necessary. And all controlling points should be protected. If the controlling points were damaged, please contact with the surveyor immediately to have a repetit

35、ion. 5.7 Project locating of construction or structure The horizontal control grid of structure can be set out as cross axis or rectangular control grid according to the characteristic of structure, and then locating, orientating and calculating subject to plant control grid. The project locating of

36、 structure mainly adopts full-station instrument and polar diagram location method, the details thereof are as follows:a. Putting the full-station instrument on controlling point, and calibrating the instrument after initialization, check the temperature, pressure and three dimensional coordinates a

37、re input, equipment height is measured and input, and rear view coordinate is also tested. If there is prism on the rear view, then the height of it should also be put in and the coordinate and the height can be measured and checked right after.b. Target at another controlling point, check the angle

38、 and coordinate, erect prism or ruler to check the view height of the instrument. While the instrument is calculation with its function, the operator should also, at the same time, calculate to check its correctness. c. Erect prism at every point to measure and record the prism height, coordinate an

39、d the height. (There will be two times of angle observation)The above are the measurements for those points which can not be measured directly.d. Install the instrument on the point as per procedure 1 and check the coordinate and height according to the other prism.e. The operator calculates the dis

40、tance and angle as per the tested points.(or feed the coordinate figures into the instrument and it will calculate automatically.)fThe operator turn the instrument clockwise until the first angle, and Instructs the prism operator to move the prism until the instrument view to measure the level dista

41、nce D.g. Calculate the distance between the actual distance and the measured distance: D=D-D°, instructs the prism operator to move forward or backward on the view line.h. Repeat procedure g until D is smaller than the measured difference( stake can be erected on soft ground)i. Check the angle

42、data of the instrument, the prism bubble should be in sharp middle(install tripod when necessary), measure it again, if D is smaller than the limit requirement, the exact point can be located.j. Measure and record site coordinate and height, and compare them with the theoretical coordinate, and mark

43、 them on the points after confirmation.k. Repeat procedures f to j, measure all the points on the site.l. If one measure station is not able to result to all points, the measurement can be continued on another measuring point, but before that, the two points already measured should be tested. The di

44、fference should not be bigger than the allowance.m. When all points are finished, random tests are effected and the results recorded. The difference should not be bigger than the allowance.n. When all job is finished, the operator check the record and sign.o. The operator compares the data with the

45、record sequentially and at the same time checks the geometrical relation between the points and the relevant dimension of the structural line and records those same to verify the noted data and measured point.p. Fill in the Measurement List.6、Measurement of Foundation6.1 Method of projected measurem

46、ent for level axis of foundation Firstly, setting out the upper line and lower line of excavation of foundation pit according to the position of axis controlling pile and ichnography of foundation excavation of building. And then mark the line with white lime. When foundation slot excavation reaches

47、 the designed elevation, using theodolite to project and measure the sideline of foundation pit and of sump, and instruct excavation by controlling peg. Before the allocation and layout of foundation are carried out on the cushion layer, the control piles of axis should be checked on the base of con

48、trol line on the surface of buildings, and then the main control lines should be projected and measured through the reiteration method with DJ2 theodolite. The allowable error of projected measurement is ±5mm.6.1.3 After the coincidence of axis of building profile projected & measured on th

49、e cushion layer has been checked and certified, the detailed axis should be made in black lines. The concealed columns & beams and opening should be marked in triangular form clearly on the relevant edges or corners with red paint. The allowable error of axis is as follows: L<30m the allowabl

50、e error is ±mm 30<L60m the allowable error is ±10mm 60<L90m the allowable error is ±15mm L>90m the allowable error is ±20mm The diagonal dimension of axis, the allowable difference is 2 times of that of length on side.6.2 Control of elevation below ±0.000 The connec

51、ting measurement of altitude control pointsWhen the elevation is measured and led into foundation ditch, the points of altitude control network should be measured jointly at first to confirm the level points needed to be contacted or not. Only after the joint measurement is correct, the elevation ne

52、eded can be measured and led into foundation ditch. Transmission of elevation below ±0.000The elevation can be transferred into foundation ditch through steel rule incorporated with level gauge in the course of construction, which is served as the base to level the bottom of ditch. The surface

53、of bottom should be checked each other, and the error of three points on the surface after check-up must not exceed 3mm, which the average value is served as reference point of elevation in the construction of surface. The reference point should be marked on the position that is easy to be accessed

54、and protected. The absolute altitude and relative elevation should be marked clearly for the purpose of construction.After the stripping work of walls and columns is finished, the designed elevation of the line of one meter should be measured and marked on the walls and columns by DS3 theodolite (th

55、e line of one meter depends on the elevation designed of each layer). The measurement of elevation and requirement of precisionWhen the elevations are measured and led, the elevations on the same floor, which has been measured and led several times, should be measured jointly and checked besides car

56、rying out the self-closed work. The error of measurement must not exceed ±5mm except that the error resulted from the settlement of buildings.7. Measurement of major structure7.1 Measurement of plain control network for buildings ±0.0007.1.1 After concrete of foundation is poured, accordin

57、g to the plain control network of plant, check the axis pile of buildings, and lead the control line of axis to draw on the outside structure surface through theodolite, which should be led to the top of column after the striking work concerned is finished. The control line of axis should be led upward as construction progress is going-on upward. W